MAX350MJN [MAXIM]
Serially Controlled, Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers; 串口控制，低电压， 8通道/双4通道多路复用器
| 型号： | MAX350MJN |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Serially Controlled, Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers |
| 文件： | 总20页 (文件大小：302K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-0451; Rev 1; 10/98
S e ria lly Co n t ro lle d , Lo w -Vo lt a g e ,
8 -Ch a n n e l/Du a l 4 -Ch a n n e l Mu lt ip le x e rs
49/MAX350
Ge n e ra l De s c rip t io n
____________________________Fe a t u re s
The MAX349/MAX350 are 8-channel and dual 4-channel
serially controlled multiplexers (muxes). These muxes
conduct equally well in either direction. On-resistance
(100Ω max) is matched between switches to 16Ω max
and is flat (10Ω max) over the specified signal range.
♦ SPI/QSPI, MICROWIRE-Compatible Serial
Interface
♦ 8 Separately Controlled SPST Switches
♦ Single 8-to-1 Mux (MAX349)
These CMOS devices can operate continuously with
dual power supplies ranging from ±2.7V to ±8V or a sin-
gle supply between +2.7V and +16V. Each mux can
handle rail-to-rail analog signals. The off-leakage current
is only 0.1nA at +25°C or 5nA at +85°C.
Dual 4-to-1 Mux (MAX350)
♦ 100Ω Signal Paths with ±5V Supplies
®
♦ Rail-to-Rail Signal Handling
♦ Asynchronous RESET Input
Upon power-up, all switches are off and the internal
shift registers are reset to zero.
♦ ±2.7V to ±8V Dual Supplies
+2.7V to +16V Single Supply
The serial interface is compatible with SPI™/QSPI™
and MICROWIRE™. Functioning as a shift register, it
allows data (at DIN) to be clocked in synchronously
with the rising edge of clock (SCLK). The shift register’s
output (DOUT) enables several MAX349s or MAX350s
to be daisy chained.
♦ >2kV ESD Protection per Method 3015.7
♦ TTL/CMOS-Compatible Inputs (with +5V or ±5V
Supplies)
Ord e rin g In fo rm a t io n
All digital inputs have 0.8V or 2.4V logic thresholds,
ensuring both TTL and CMOS-logic compatibility when
using ±5V supplies or a single +5V supply.
PART
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
18 Plastic DIP
18 Wide SO
20 SSOP
MAX349CPN
MAX349CWN
MAX349CAP
MAX349C/D
________________________Ap p lic a t io n s
Serial Data-Acquisition
Systems
Industrial and Process-
Control Systems
Dice*
Ordering Information continued at end of data sheet.
*Contact factory for dice specifications.
Avionics
ATE Equipment
Networking
Audio Signal Routing
P in Co n fig u ra t io n s /Fu n c t io n a l Dia g ra m s
TOP VIEW
SCLK
CS
18
SCLK
1
CS
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
MAX349
MAX350
V+
DIN
RESET
17
2
3
4
5
6
7
8
9
V+
DIN
RESET
DOUT
V-
DOUT
16
LOGIC
LOGIC
GND
GND
V-
15
COM
NO0
NO1
NO2
N.C.
14
COMA
NO0A
NO1A
NO2A
COMB
NO0B
NO1B
NO2B
NO3B
NO7
NO6
NO5
NO4
13
12
11
10
NO3
NO3A
DIP/SO
N.C. = NOT INTERNALLY
CONNECTED
DIP/SO
Pin Configurations continued at end of data sheet.
SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
S e ria lly Co n t ro lle d , Lo w -Vo lt a g e ,
8 -Ch a n n e l/Du a l 4 -Ch a n n e l Mu lt ip le x e rs
ABSOLUTE MAXIMUM RATINGS
Voltages Referenced to GND
Continuous Power Dissipation (T = +70°C)
A
V+ ...........................................................................-0.3V, +17V
V- ............................................................................-17V, +0.3V
V+ to V-...................................................................-0.3V, +17V
SCLK, CS, DIN, DOUT, RESET .................-0.3V to (V+ + 0.3V)
NO, COM.................................................(V- - 2V) to (V+ + 2V)
Continuous Current into Any Terminal..............................±30mA
Peak Current, NO or COM
18-Pin Plastic DIP (derate 11.11mW/°C above +70°C) ..889mW
18-Pin SO (derate 9.52mW/°C above +70°C)...............762mW
20-Pin SSOP (derate 8.00mW/°C above +70°C) ..........640mW
18-Pin CERDIP (derate 10.53mW/°C above +70°C).....842mW
Operating Temperature Ranges
MAX349C_ _, MAX350C_ _ .................................0°C to +70°C
MAX349E_ _, MAX350E_ _ ...............................-40°C to +85°C
MAX349M_ _, MAX350M_ _ ...........................-55°C to +125°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°C
(pulsed at 1ms, 10% duty cycle).................................±100mA
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
49/MAX350
ELECTRICAL CHARACTERISTICS—Dual Supplies
(V+ = +4.5V to +5.5V, V- = -4.5V to -5.5V, T = T
to T , unless otherwise noted. Typical values are at T = +25°C.)
MAX A
A
MIN
MIN
TYP
(Note 1)
MAX
PARAMETER
SYMBOL
CONDITIONS
UNITS
ANALOG SWITCH
Analog Signal Range
V
, V
C, E, M
= +25°C
V-
V+
100
125
16
20
10
15
0.1
5
V
COM NO
T
A
60
V+ = 5V, V- = -5V,
= ±3V, I
COM-NO On-Resistance
R
Ω
ON
V
COM
= 1mA
= 1mA
NO
C, E, M
= +25°C
T
A
COM-NO On-Resistance Match
Between Channels (Note 2)
V+ = 5V, V- = -5V,
= ±3V, I
∆R
Ω
Ω
ON
V
COM
NO
C, E, M
= +25°C
T
A
COM-NO On-Resistance
Flatness (Note 2)
V+ = 5V, V- = -5V, I = 1mA,
NO
R
FLAT(ON)
V
COM
= -3V, 0V, 3V
C, E, M
= +25°C
T
-0.1
-5
0.002
0.002
0.002
0.002
0.002
0.002
A
V+ = 5.5V, V- = -5.5V,
= -4.5V, V = 4.5V
C, E
M
V
COM
NO
-10
-0.1
-5
10
0.1
5
NO Off-Leakage Current
(Note 3)
I
nA
NO(OFF)
T
A
= +25°C
V+ = 5.5V, V- = -5.5V,
= 4.5V, V = -4.5V
C, E
M
V
COM
NO
-10
-0.1
-10
-100
-0.1
-5
10
0.1
10
100
0.1
5
T
A
= +25°C
V+ = 5.5V,
V- = -5.5V,
MAX349
C, E
M
V
COM
=
T
A
= +25°C
±4.5V,
= ±4.5V MAX350
V
C, E
M
NO
-50
-0.2
-10
-100
-0.2
-5
50
0.2
10
100
0.2
5
COM Off-Leakage Current
(Note 3)
I
nA
COM(OFF)
T
A
= +25°C
V+ = 5.5V,
V- = -5.5V,
MAX349
MAX350
C, E
M
V
COM
=
T
A
= +25°C
-4.5V,
= 4.5V
V
C, E
M
NO
-50
50
2
_______________________________________________________________________________________
S e ria lly Co n t ro lle d , Lo w -Vo lt a g e ,
8 -Ch a n n e l/Du a l 4 -Ch a n n e l Mu lt ip le x e rs
49/MAX350
ELECTRICAL CHARACTERISTICS—Dual Supplies (continued)
(V+ = +4.5V to +5.5V, V- = -4.5V to -5.5V, T = T
to T , unless otherwise noted. Typical values are at T = +25°C.)
MAX A
A
MIN
MIN
TYP
(Note 1)
MAX
PARAMETER
SYMBOL
CONDITIONS
UNITS
T
= +25°C
-0.2
-10
-100
-0.2
-5
0.001
0.2
10
A
MAX349
C, E
M
V+ = 5.5V,
V- = -5.5V,
100
0.2
5
COM On-Leakage Current
(Note 3)
I
nA
COM(ON)
V
COM
= V
=
NO
T
A
= +25°C
0.02
±4.5V
MAX350
C, E
M
-50
50
DIGITAL I/O
DIN, SCLK, CS, RESET Input
Voltage Logic Threshold High
V
C, E, M
C, E, M
C, E, M
2.4
V
V
IH
DIN, SCLK, CS, RESET Input
Voltage Logic Threshold Low
V
IL
0.8
1
V
V
, V
,
DIN, SCLK, CS, RESET Input
Current Logic High or Low
DIN SCLK
I
I
-1
0.03
100
µA
IH, IL
= 0.8V or 2.4V
CS
DOUT Output Voltage Logic High
DOUT Output Voltage Logic Low
SCLK Input Hysteresis
V
I
= 0.8mA
= -1.6mA
DOUT
C, E, M
C, E, M
C, E, M
2.8
0
V+
V
V
DOUT
DOUT
V
I
0.4
DOUT
SCLK
mV
HYST
SWITCH DYNAMIC CHARACTERISTICS
T
= +25°C
200
90
275
400
150
300
A
Turn-On Time
Turn-Off Time
t
ns
ns
From rising edge of CS
ON
C, E, M
= +25°C
T
A
t
From rising edge of CS
From rising edge of CS
OFF
C, E, M
= +25°C
Break-Before-Make Delay
Charge Injection (Note 4)
NO Off-Capacitance
t
T
5
40
1
ns
pC
pF
pF
BBM
A
V
CTE
C
= 1nF, V = 0V, R = 0Ω
T
= +25°C
= +25°C
T = +25°C
A
10
L
NO
S
A
C
V
NO
= GND, f = 1MHz
T
A
2
NO(OFF)
COM Off-Capacitance
C
V
COM
= GND, f = 1MHz
2
COM(OFF)
V
= V = GND,
NO
COM
Switch On-Capacitance
Off-Isolation
C
T
= +25°C
= +25°C
= +25°C
8
pF
dB
dB
(ON)
A
f = 1MHz
R
L
= 50Ω, C = 15pF,
L
V
T
A
> 90
< -90
ISO
V
NO
= 1V
, f = 100kHz
RMS
R
L
= 50Ω, C = 15pF,
L
Channel-to-Channel Crosstalk
V
T
A
CT
V
NO
= 1V
, f = 100kHz
RMS
POWER SUPPLY
Power-Supply Range
V+, V-
I+
C, E, M
= +25°C
±3
±8
20
30
1
V
T
A
7
DIN = CS = SCLK = 0V or V+,
RESET = 0V or V+
V+ Supply Current
V- Supply Current
µA
C, E, M
= +25°C
T
-1
-2
0.1
DIN = CS = SCLK = 0V or V+,
RESET = 0V or V+
A
I-
µA
C, E, M
2
_______________________________________________________________________________________
3
S e ria lly Co n t ro lle d , Lo w -Vo lt a g e ,
8 -Ch a n n e l/Du a l 4 -Ch a n n e l Mu lt ip le x e rs
TIMING CHARACTERISTICS—Dual Supplies (Figure 1)
(V+ = +4.5V to +5.5V, V- = -4.5V to -5.5V, T = T
to T , unless otherwise noted. Typical values are at T = +25°C.)
MAX A
A
MIN
MIN
TYP
(Note 1)
MAX
PARAMETER
SYMBOL
CONDITIONS
UNITS
SERIAL DIGITAL INTERFACE
SCLK Frequency
f
C, E, M
C, E, M
C, E, M
0
2.1
MHz
ns
SCLK
Cycle Time
t
+ t
CL
480
240
CH
t
ns
CS Lead Time
CSS
t
C, E, M
C, E, M
C, E, M
C, E, M
C, E, M
240
190
190
ns
ns
ns
ns
ns
CS Lag Time
CSH2
SCLK High Time
SCLK Low Time
Minimum Data Setup Time
Data Hold Time
t
CH
t
CL
DS
DH
t
17
-17
85
100
t
0
T
A
= +25°C
DIN Data Valid after Falling SCLK
(Note 4)
50% of SCLK to 10% of DOUT,
= 10pF
t
ns
ns
µs
ns
DO
49/MAX350
C
L
C, E, M
400
100
20% of V+ to 70% of V+,
= 10pF
Rise Time of DOUT (Note 4)
t
DR
C, E, M
C
L
Allowable Rise Time at DIN, SCLK
(Note 4)
20% of V+ to 70% of V+,
= 10pF
t
C, E, M
C, E, M
C, E, M
2
100
2
SCR
C
L
20% of V+ to 70% of V+,
= 10pF
Fall Time of DOUT (Note 4)
t
DF
C
L
Allowable Fall Time at DIN, SCLK
(Note 4)
20% of V+ to 70% of V+,
= 10pF
t
µs
ns
SCF
C
L
t
T
A
= +25°C
70
RESET Minimum Pulse Width
RW
Note 1: The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column.
Note 2: ∆R = R - R . On-resistance match between channels and on-resistance flatness are guaranteed only with
ON
ON(max)
ON(min)
specified voltages. Flatness is defined as the difference between the maximum and minimum value of on-resistance as
measured over the specified analog signal range.
Note 3: Leakage parameters are 100% tested at maximum rated hot temperature and guaranteed by correlation at room temp.
Note 4: Guaranteed by design.
Note 5: Leakage testing at single supply is guaranteed by testing with dual supplies.
Note 6: See Figure 6. Off-isolation = 20log
V
/V , V
= output. NO = input to off switch.
10 COM NO COM
Note 7: Between any two switches. See Figure 3.
4
_______________________________________________________________________________________
S e ria lly Co n t ro lle d , Lo w -Vo lt a g e ,
8 -Ch a n n e l/Du a l 4 -Ch a n n e l Mu lt ip le x e rs
49/MAX350
ELECTRICAL CHARACTERISTICS—Single +5V Supply
(V+ = +4.5V to +5.5V, V- = 0V, T = T
A
to T , unless otherwise noted. Typical values are at T = +25°C.)
MAX A
MIN
MIN
TYP
(Note 1)
MAX
PARAMETER
SYMBOL
CONDITIONS
UNITS
ANALOG SWITCH
Analog Signal Range
V
, V
C, E, M
= +25°C
V-
V+
175
225
0.1
5
V
COM NO
T
A
125
V+ = 5V, V
= 3.5V,
COM
COM-NO On-Resistance
R
Ω
ON
I
NO
= 1mA
C, E, M
= +25°C
T
-0.1
-5
0.002
A
V+ = 5.5V, V
= 4.5V,
COM
C, E
M
V
NO
= 0V
-10
-0.1
-5
10
0.1
5
NO Off-Leakage Current
(Notes 4, 5)
I
nA
nA
nA
NO(OFF)
T
A
= +25°C
0.002
0.002
0.002
0.002
0.002
0.01
V+ = 5.5V, V
= 0V,
COM
C, E
M
V
NO
= 4.5V
-10
-0.1
-10
-100
-0.1
-5
10
0.1
10
100
0.1
5
T
A
= +25°C
MAX349
C, E
M
V+ = 5.5V,
= 4.5V,
V
COM
T
A
= +25°C
V
NO
= 0V
MAX350
MAX349
MAX350
MAX349
MAX350
C, E
M
-50
-0.2
-10
-100
-0.2
-5
50
0.2
10
100
0.2
5
COM Off-Leakage Current
(Notes 4, 5)
I
COM(OFF)
T
A
= +25°C
C, E
M
V+ = 5.5V,
V
COM
= 0V,
T
A
= +25°C
V
NO
= 4.5V
C, E
M
-50
-0.2
-10
-100
-0.2
-5
50
0.2
10
100
0.2
5
T
A
= +25°C
C, E
M
V+ = 5.5V,
= V
COM On-Leakage Current
(Notes 4, 5)
I
V
COM
=
NO
COM(ON)
T
A
= +25°C
0.02
±4.5V
C, E
M
-50
50
DIGITAL I/O
DIN, SCLK, CS, RESET Input
Voltage Logic Threshold High
V
C, E, M
C, E, M
C, E, M
2.4
V
V
IH
DIN, SCLK, CS, RESET Input
Voltage Logic Threshold Low
V
IL
0.8
1
V
V
, V
,
DIN, SCLK, CS, RESET Input
Current Logic High or Low
DIN SCLK
I
, I
IH IL
-1
0.03
µA
= 0.8V or 2.4V
CS
DOUT Output Voltage Logic High
DOUT Output Voltage Logic Low
SCLK Input Hysteresis
V
I
= 0.8mA
= -1.6mA
DOUT
C, E, M
C, E, M
C, E, M
2.8
0
V+
V
V
DOUT
DOUT
V
DOUT
I
0.4
SCLK
100
7
mV
HYST
POWER SUPPLY
T
A
= +25°C
20
30
DIN = CS = SCLK = 0V or V+,
RESET = 0V or V+
V+ Supply Current
I+
µA
C, E, M
_______________________________________________________________________________________
5
S e ria lly Co n t ro lle d , Lo w -Vo lt a g e ,
8 -Ch a n n e l/Du a l 4 -Ch a n n e l Mu lt ip le x e rs
ELECTRICAL CHARACTERISTICS—Single +5V Supply (continued)
(V+ = +4.5V to +5.5V, V- = 0V, T = T
A
to T , unless otherwise noted. Typical values are at T = +25°C.)
MAX A
MIN
MIN
TYP
(Note 1)
MAX
PARAMETER
SYMBOL
CONDITIONS
UNITS
SWITCH DYNAMIC CHARACTERISTICS
T
= +25°C
160
60
400
500
200
300
A
Turn-On Time
Turn-Off Time
t
ns
ns
From rising edge of CS
ON
C, E, M
= +25°C
T
A
t
From rising edge of CS
From rising edge of CS
OFF
C, E, M
= +25°C
Break-Before-Make Delay
Charge Injection (Note 4)
t
T
15
1
ns
BBM
A
V
CTE
C
= 1nF, V = 0V, R = 0Ω
T
= +25°C
= +25°C
A
10
pC
L
NO
S
A
R
L
= 50Ω, C = 15pF,
L
Off-Isolation (Note 6)
V
T
> 90
dB
dB
ISO
V
NO
= 1V
, f = 100kHz
RMS
Channel-to-Channel Crosstalk
(Note 7)
R = 50Ω, C = 15pF,
L L
V
T
A
= +25°C
< -90
CT
V
NO
= 1V
, f = 100kHz
RMS
49/MAX350
6
_______________________________________________________________________________________
S e ria lly Co n t ro lle d , Lo w -Vo lt a g e ,
8 -Ch a n n e l/Du a l 4 -Ch a n n e l Mu lt ip le x e rs
49/MAX350
TIMING CHARACTERISTICS—Single +5V Supply (Figure 1)
(V+ = +4.5V to +5.5V, V- = 0V, T = T
A
to T , unless otherwise noted. Typical values are at T = +25°C.)
MAX A
MIN
MIN
TYP
(Note 1)
MAX
PARAMETER
SYMBOL
CONDITIONS
UNITS
SERIAL DIGITAL INTERFACE
SCLK Frequency
f
C, E, M
C, E, M
C, E, M
0
2.1
MHz
ns
SCLK
Cycle Time (Note 4)
t
+ t
CL
480
240
CH
t
ns
CS Lead Time (Note 4)
CSS
t
C, E, M
C, E, M
C, E, M
240
190
190
ns
ns
ns
CS Lag Time (Note 4)
CSH2
SCLK High Time (Note 4)
SCLK Low Time (Note 4)
t
CH
t
CL
DS
DH
DO
Minimum Data Setup Time
(Note 4)
t
C, E, M
C, E, M
17
100
ns
ns
ns
Data Hold Time (Note 4)
t
-17
85
T = +25°C
A
DIN Data Valid after Falling SCLK
(Note 4)
50% of SCLK to 10% of
DOUT, C = 10pF
L
t
C, E, M
400
100
20% of V+ to 70% of V+,
Rise Time of DOUT (Note 4)
t
C, E, M
ns
µs
ns
DR
C
= 10pF
L
Allowable Rise Time at DIN,
SCLK (Note 4)
20% of V+ to 70% of V+,
= 10pF
t
C, E, M
C, E, M
C, E, M
2
100
2
SCR
C
L
20% of V+ to 70% of V+,
= 10pF
Fall Time of DOUT (Note 4)
t
DF
C
L
Allowable Fall Time at DIN,
SCLK (Note 4)
20% of V+ to 70% of V+,
= 10pF
t
µs
ns
SCF
C
L
t
T
A
= +25°C
70
RESET Minimum Pulse Width
RW
Note 1: The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column.
Note 2: ∆R = R - R . On-resistance match between channels and on-resistance flatness are guaranteed only with
ON
ON(max)
ON(min)
specified voltages. Flatness is defined as the difference between the maximum and minimum value of on-resistance as
measured over the specified analog signal range.
Note 3: Leakage parameters are 100% tested at maximum rated hot temperature and guaranteed by correlation at room temp.
Note 4: Guaranteed by design.
Note 5: Leakage testing at single supply is guaranteed by testing with dual supplies.
Note 6: See Figure 6. Off-isolation = 20log
V
/V , V
= output. NO = input to off switch.
10 COM NO COM
Note 7: Between any two switches. See Figure 3.
_______________________________________________________________________________________
7
S e ria lly Co n t ro lle d , Lo w -Vo lt a g e ,
8 -Ch a n n e l/Du a l 4 -Ch a n n e l Mu lt ip le x e rs
ELECTRICAL CHARACTERISTICS—Single +3V Supply
(V+ = +3.0V to +3.6V, V- = 0V, T = T
A
to T , unless otherwise noted. Typical values are at T = +25°C.)
MAX A
MIN
MIN
TYP
(Note 1)
MAX
PARAMETER
SYMBOL
CONDITIONS
UNITS
ANALOG SWITCH
Analog Signal Range
V
, V
C, E, M
= +25°C
V-
V+
500
600
0.1
10
V
COM NO
T
A
270
V+ = 3.0V, V
= 1.5V,
COM
COM-NO On-Resistance
R
Ω
ON
I
NO
= 1mA
C, E, M
= +25°C
T
-0.1
-10
-100
-0.1
-5
0.002
A
MAX349
C, E
M
V+ = 3.6V,
= 3V,
100
0.1
5
V
COM
T
A
= +25°C
0.002
0.002
0.002
0.01
V
NO
= 0V
MAX350
MAX349
MAX350
MAX349
MAX350
C, E
M
-50
-0.2
-10
-100
-0.2
-5
50
COM Off-Leakage Current
(Notes 4, 5)
49/MAX350
I
nA
COM(OFF)
T
A
= +25°C
0.2
10
C, E
M
V+ = 3.6V,
= 0V,
100
0.2
5
V
COM
T
A
= +25°C
V
NO
= 3V
C, E
M
-50
-0.2
-10
-100
-0.2
-5
50
T
A
= +25°C
0.2
10
C, E
M
100
0.2
5
COM On-Leakage Current
(Notes 4, 5)
V+ = 3.6V,
= V = 3V
I
nA
COM(ON)
V
COM
NO
T
A
= +25°C
0.02
C, E
M
-50
50
DIGITAL I/O
DIN, SCLK, CS, RESET Input
Voltage Logic Threshold High
V
C, E
C, E
C, E
2.4
V
V
IH
DIN, SCLK, CS, RESET Input
Voltage Logic Threshold Low
V
IL
0.8
1
V
, V
,
DIN, SCLK, CS, RESET Input
Current Logic High or Low
DIN SCLK
I
, I
IH IL
-1
0.03
µA
V
CS
= 0.8V or 2.4V
DOUT Output Voltage Logic High
DOUT Output Voltage Logic Low
SCLK Input Hysteresis
V
I
= 0.1mA
= -1.6mA
DOUT
C, E, M
C, E, M
C, E, M
2.8
0
V+
V
V
DOUT
DOUT
V
DOUT
I
0.4
SCLK
100
6
mV
HYST
POWER SUPPLY
T
A
= +25°C
20
30
DIN = CS = SCLK = 0V or V+,
RESET = 0V or 5V
V+ Supply Current
I+
µA
C, E, M
8
_______________________________________________________________________________________
S e ria lly Co n t ro lle d , Lo w -Vo lt a g e ,
8 -Ch a n n e l/Du a l 4 -Ch a n n e l Mu lt ip le x e rs
49/MAX350
ELECTRICAL CHARACTERISTICS—Single +3V Supply (continued)
(V+ = +3.0V to +3.6V, V- = 0V, T = T
A
to T , unless otherwise noted. Typical values are at T = +25°C.)
MAX A
MIN
MIN
TYP
(Note 1)
MAX
PARAMETER
SYMBOL
CONDITIONS
UNITS
SWITCH DYNAMIC CHARACTERISTICS
T
= +25°C
275
120
600
700
300
400
A
Turn-On Time (Note 4)
Turn-Off Time (Note 4)
t
ns
ns
From rising edge of CS
ON
C, E, M
= +25°C
T
A
t
From rising edge of CS
From rising edge of CS
OFF
C, E, M
= +25°C
Break-Before-Make Delay (Note 4)
Charge Injection (Note 4)
t
T
5
15
1
ns
BBM
A
V
CTE
C
= 1nF, V = 0V, R = 0Ω
T
= +25°C
= +25°C
A
10
pC
L
NO
S
A
R
L
= 50Ω, C = 15pF,
L
Off-Isolation (Note 6)
V
T
> 90
dB
dB
ISO
V
NO
= 1V
, f = 100kHz
RMS
Channel-to-Channel Crosstalk
(Note 7)
R = 50Ω, C = 15pF,
L L
V
T
A
= +25°C
< –90
CT
V
NO
= 1V
, f = 100kHz
RMS
49/MAX350
_______________________________________________________________________________________
9
S e ria lly Co n t ro lle d , Lo w -Vo lt a g e ,
8 -Ch a n n e l/Du a l 4 -Ch a n n e l Mu lt ip le x e rs
TIMING CHARACTERISTICS—Single +3V Supply (Figure 1)
(V+ = +3.0V to +3.6V, V- = 0V, T = T
A
to T , unless otherwise noted. Typical values are at T = +25°C.)
MAX A
MIN
MIN
TYP
(Note 1)
MAX
PARAMETER
SYMBOL
CONDITIONS
UNITS
SERIAL DIGITAL INTERFACE
SCLK Frequency
f
C, E, M
C, E, M
C, E, M
0
2.1
MHz
ns
SCLK
Cycle Time (Note 4)
t
+ t
CL
480
240
CH
CS Lead Time (Note 4)
t
ns
CSS
CS Lag Time (Note 4)
t
C, E, M
C, E, M
C, E, M
240
190
190
ns
ns
ns
CSH2
SCLK High Time (Note 4)
SCLK Low Time (Note 4)
t
CH
t
CL
DS
DH
DO
Minimum Data Setup Time
(Note 4)
t
C, E, M
C, E, M
38
120
ns
ns
ns
Data Hold Time (Note 4)
t
-38
49/MAX350
T = +25°C
A
150
DIN Data Valid after Falling SCLK
(Note 4)
50% of SCLK to 10% of
DOUT, C = 10pF
L
t
C, E, M
400
100
20% of V+ to 70% of V+,
Rise Time of DOUT (Note 4)
t
C, E, M
ns
µs
ns
µs
ns
DR
C
= 10pF
L
Allowable Rise Time at DIN,
SCLK (Note 4)
20% of V+ to 70% of V+,
= 10pF
t
C, E, M
C, E, M
C, E, M
2
100
2
SCR
C
L
20% of V+ to 70% of V+,
= 10pF
Fall Time of DOUT (Note 4)
t
DF
C
L
Allowable Fall Time at DIN, SCLK
(Note 4)
20% of V+ to 70% of V+,
= 10pF
t
SCF
C
L
RESET Minimum Pulse Width
(Note 4)
t
T
A
= +25°C
105
RW
Note 1: The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column.
Note 2: ∆R = R - R . On-resistance match between channels and on-resistance flatness are guaranteed only with
ON
ON(max)
ON(min)
specified voltages. Flatness is defined as the difference between the maximum and minimum value of on-resistance as
measured over the specified analog signal range.
Note 3: Leakage parameters are 100% tested at maximum rated hot temperature and guaranteed by correlation at room temp.
Note 4: Guaranteed by design.
Note 5: Leakage testing at single supply is guaranteed by testing with dual supplies.
Note 6: See Figure 6. Off-isolation = 20log
V
/V , V
= output. NO = input to off switch.
10 COM NO COM
Note 7: Between any two switches. See Figure 3.
10 ______________________________________________________________________________________
S e ria lly Co n t ro lle d , Lo w -Vo lt a g e ,
8 -Ch a n n e l/Du a l 4 -Ch a n n e l Mu lt ip le x e rs
49/MAX350
__________________________________________Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s
(V+ = +5V, V- = -5V, GND = 0V, T = +25°C, unless otherwise noted.)
A
ON-RESISTANCE vs. V
COM
ON-RESISTANCE vs. V
ON-RESISTANCE vs. V
COM
COM
AND TEMPERATURE
(DUAL SUPPLIES)
(SINGLE SUPPLY)
(DUAL SUPPLIES)
140
120
100
400
350
300
250
110
100
90
V+ = 2.5V
V- = 0V
V± = ±5.5V
V± = ±2.5V
V± = ±3V
T = +125°C
A
80
80
60
40
T = +85°C
A
200
70
V+ = 3V
V+ = 5V
150
100
60
T = +25°C
A
V± = ±5V
50
V+ = 9V
20
0
T = -55°C
A
50
0
40
V+ = 12V
10
30
-5 -4 -3 -2 -1
0
1
2
3
4
5
0
2
4
6
8
12
-5 -4 -3 -2 -1
0
1
2
3
4
5
V
COM
(V)
V
COM
(V)
V
COM
(V)
ON-RESISTANCE vs. V
AND TEMPERATURE
(SINGLE SUPPLY)
COM
OFF-LEAKAGE vs.
TEMPERATURE
ON-LEAKAGE vs.
TEMPERATURE
1,000
100
180
160
10,000
1,000
100
V± = ±5.5V
V+ = 5V
V- = 0V
V± = ±5.5V
T = +125°C
A
140
120
100
80
T = +85°C
A
10
1
T = +25°C
A
10
1
T = -55°C
A
60
40
0.1
0.1
-50 -25
0
25
50
75 100 125
-50 -25
0
25
50
75 100 125
0
1
2
3
4
5
TEMPERATURE (°C)
TEMPERATURE (°C)
V
COM
(V)
DATA HOLD TIME vs.
POWER-SUPPLY VOLTAGE
CHARGE INJECTION vs. V
TURN-ON/TURN-OFF TIMES vs. V
COM
COM
5
4
3
250
200
150
100
50
A: V+ = 5V, V- = 5V
B: V+ = 5V, V- = 0V
A: V+ = 5V, V- = -5V
B: V+ = 5V, V- = 0V
40
30
20
2
1
A
10
0
0
B = t
ON
A = t
ON
-1
-10
B
-2
-3
-4
-5
B = t
-20
-30
-40
-50
OFF
A = t
OFF
50
0
-5 -4 -3 -2 -1
0
1
2
3
4
5
-5 -4 -3 -2 -1
0
1
2
3
4
5
0
2
4
6
8
V
COM
(V)
V
COM
(V)
SUPPLY VOLTAGE (V)
______________________________________________________________________________________ 11
S e ria lly Co n t ro lle d , Lo w -Vo lt a g e ,
8 -Ch a n n e l/Du a l 4 -Ch a n n e l Mu lt ip le x e rs
Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s (c o n t in u e d )
(V+ = +5V, V- = -5V, GND = 0V, T = +25°C, unless otherwise noted.)
A
DATA SETUP TIME vs.
POSITIVE SUPPLY VOLTAGE
POWER-SUPPLY CURRENT
vs. TEMPERATURE
MINIMUM SCLK PULSE WIDTH vs.
POSITIVE SUPPLY VOLTAGE
100
90
100
10
1
35
30
25
20
V± = ±5.5V
80
I+
70
60
50
40
0.1
30
20
10
0
I-
0.01
15
10
49/MAX350
0.001
0
2
4
6
8
-50 -25
0
25
50
75 100 125
0
2
4
6
8
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
FREQUENCY RESPONSE
20
100
INSERTION LOSS
V± = ±5V
600Ω IN AND OUT
0
0
V± = ±5V
50W IN AND OUT
10
1
-20
-20
-40
PHASE
-40
-60
ISOLATION OF
A BARE SOCKET
-60
OFF ISOLATION
-80
0.1
0.01
-80
-100
-120
-100
10
100
1k
10k
10k
100k
1M
10M
100M
1G
FREQUENCY (Hz)
FREQUENCY (Hz)
12 ______________________________________________________________________________________
S e ria lly Co n t ro lle d , Lo w -Vo lt a g e ,
8 -Ch a n n e l/Du a l 4 -Ch a n n e l Mu lt ip le x e rs
49/MAX350
P in De s c rip t io n
PIN
MAX349
MAX350
NAME
FUNCTION
DIP/SO
SSOP
DIP/SO
SSOP
1
2
3
1
2
3
1
2
3
1
2
3
SCLK
V+
Serial Clock Digital Input
Positive Analog Supply Voltage Input
Serial Data Digital Input
DIN
Ground. Connect to digital ground. (Analog signals have
no ground reference; they are limited to V+ and V-.)
4
4
5
4
4
GND
5
6–13
—
—
—
—
—
COM
NO0–NO7
COMA
Common Analog Switch (mux output)
Normally Open Analog Switch Inputs 0–7
Common Analog Switch “A” (mux output)
Normally Open Analog Switch “A” Inputs 0–3
Normally Open Analog Switch “B” Inputs 0–3
Common Analog Switch “B” (mux output)
No Connect, not internally connected.
6–9, 11–14
—
—
5
5
—
6–9
10–13
14
6–9
11–14
15
NO0A–NO3A
NO3B–NO0B
COMB
—
—
—
—
14
10, 15, 16
—
10, 16
N.C.
Negative Analog Supply Voltage Input. Connect to GND
for single-supply operation.
15
16
17
18
17
18
19
20
15
16
17
18
17
18
19
20
V-
DOUT
RESET
CS
Serial Data Digital Output. Output high is V+.
RESET Input. Connect to logic high (or V+) for normal operation.
Drive low to set all switches off and set internal shift registers to 0.
Chip-Select Digital Input (Figure 1)
Note: NO and COM pins are identical and interchangeable. Either may be considered as an input or an output; signals pass equally
well in either direction.
tCSH2
CS
• • •
tCSS
tCH
tON,
tOFF
SCLK
• • •
tCL
tDS
tDH
DIN
• • •
tDO
DOUT
• • •
• • •
• • •
COM-OUT
Figure 1. Timing Diagram
______________________________________________________________________________________ 13
S e ria lly Co n t ro lle d , Lo w -Vo lt a g e ,
8 -Ch a n n e l/Du a l 4 -Ch a n n e l Mu lt ip le x e rs
and a stream of data is shifted through the MAX349s or
De t a ile d De s c rip t io n
MAX350s in s e rie s . Whe n CS is b roug ht hig h, a ll
switches are updated simultaneously. Additional shift
registers may be included anywhere in series with the
MAX349/MAX350 data chain. Note that the DOUT high
le ve l is V+ , whic h ma y not b e c omp a tib le with
TTL/CMOS devices if V+ differs from the logic supply
for these other devices.
Ba s ic Op e ra t io n
The MAX349/MAX350 are 8-channel and dual 4-chan-
nel, serially controlled multiplexers (muxes). These
muxes are unusual in that any, all, or none of the input
channels can be directed to the output. All switches
a re b id ire c tiona l, s o inp uts a nd outp uts a re inte r-
changeable. When multiple inputs are connected to an
output, they are also connected to one another, sepa-
rated from each other only by the on-resistance of two
switches. Both parts require eight bits of serial data to
set all eight switches.
Ad d re s s a b le S e ria l In t e rfa c e
When several serial devices are configured as slaves,
a d d re s s a b le b y the p roc e s s or, DIN p ins of e a c h
decode logic individually control CS of each slave
device. When a slave is selected, its CS pin is driven
low, data is shifted in, and CS is driven high to latch the
data. Typically, only one slave is addressed at a time.
DOUT is not used.
S e ria l Dig it a l In t e rfa c e
The MAX349/MAX350 interface can be thought of as an
8-bit shift register controlled by CS (Figure 2). While CS
is low, input data appearing at DIN is clocked into the
shift register synchronously with SCLK’s rising edge.
The input is an 8-bit word, each bit controlling one of
the eight switches (Tables 1 and 2). DOUT is the output
of the shift register, with data appearing synchronously
with SCLK’s falling edge. Data at DOUT is simply the
input data delayed by eight clock cycles.
49/MAX350
Ap p lic a t io n s In fo rm a t io n
8 x 1 Mu lt ip le x e r
The MAX349 can be programmed normally, with only
one channel selected for every eight clock pulses, or it
can be programmed in a fast mode, where channel
changing occurs on each clock pulse.
When shifting the input data, D7 is the first bit in and
out of the shift register. While shifting data, the switches
remain in their previous configuration. When the eight
bits of data have been shifted in, CS is driven high.
This updates the new switch configuration and inhibits
further data from entering the shift register. Transitions
at DIN and SCLK have no effect when CS is high, and
DOUT holds the first input bit (D7) at its output.
In fast mode, select the channels by sending a single high
pulse (corresponding to the selected channel) at DIN, and
a corresponding CS low pulse for every eight clock puls-
es. As SCLK clocks this through the register, each switch
sequences one channel at a time, starting with channel 0.
SWITCHES UPDATED
More or fewer than eight clock cycles can be entered
during the CS low period. When this happens, the shift
register contains only the last eight serial data bits,
regardless of when they were entered. On the rising
edge of CS, all switches are set to the corresponding
states.
CS
SCLK
DATA CLOCKED IN
DIN
The MAX349/MAX350 thre e -wire s e ria l inte rfa c e is
compatible with SPI, QSPI, and MICROWIRE standards.
If interfacing with a Motorola processor serial interface,
set CPOL = 0. The MAX349/MAX350 are considered to
be slave devices (Figures 2 and 3). At power-up, the
shift register contains all zeros, and all switches are off.
D7
D6 D5 D4 D3 D2 D1 D0
LSB
MSB
INPUT DATA BITS
DATA CLOCKED OUT
The latch that drives the analog switch is updated on
the rising edge of CS, regardless of SCLK’s state. This
meets all SPI and QSPI requirements.
DOUT
D7
D6 D5 D4 D3 D2 D1 D0
D7
Da is y-Ch a in in g
For a simple interface using several MAX349s and
MAX350s, “daisy-chain” the shift registers as shown in
Figure 5. The CS pins of all devices are connected,
DATA BITS FROM PREVIOUS DATA INPUT
DOUT POWER-UP DEFAULT: D7–D0 = 0
Figure 2. 3-Wire Interface Timing
14 ______________________________________________________________________________________
S e ria lly Co n t ro lle d , Lo w -Vo lt a g e ,
8 -Ch a n n e l/Du a l 4 -Ch a n n e l Mu lt ip le x e rs
49/MAX350
Table 1. MAX349 Serial-Interface Switch Programming
DATA BITS
RESET
MAX349 FUNCTION
D7
D6
D5
D4
D3
D2
D1
D0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
X
0
X
0
X
0
X
0
X
0
X
0
X
0
X
0
All switches open, D7–D0 = 0
All switches open, D7–D0 = 0
All switches closed to COM, D7–D0 = 1
Switch 7 open (off)
1
1
1
1
1
1
1
1
0
X
X
0
X
X
X
X
0
X
X
X
X
X
X
0
X
X
X
X
X
X
X
X
0
X
X
X
X
X
X
X
X
X
X
0
X
X
X
X
X
X
X
X
X
X
X
X
0
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
1
Switch 7 closed to COM
Switch 6 open (off)
X
X
X
X
X
X
X
X
X
X
X
X
X
X
1
Switch 6 closed to COM
Switch 5 open (off)
X
X
X
X
X
X
X
X
X
X
X
X
1
Switch 5 closed to COM
Switch 4 open (off)
X
X
X
X
X
X
X
X
X
X
1
Switch 4 closed to COM
Switch 3 open (off)
X
X
X
X
X
X
X
X
1
Switch 3 closed to COM
Switch 2 open (off)
X
X
X
X
X
X
1
Switch 2 closed to COM
Switch 1 open (off)
X
X
X
X
1
Switch 1 closed to COM
Switch 0 open (off)
X
X
1
Switch 0 closed to COM
Table 2. MAX350 Serial-Interface Switch Programming
DATA BITS
RESET
MAX350 FUNCTION
D7
D6
D5
D4
D3
D2
D1
D0
0
X
0
X
0
X
0
X
0
X
0
X
0
X
0
X
0
All switches open, D7–D0 = 0
All switches open, D7–D0 = 0
1
All “A” switches closed to COMA; All “B”
switches closed to COMB, D7–D0 = 1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
X
X
0
X
X
X
X
0
X
X
X
X
X
X
0
X
X
X
X
X
X
X
X
0
X
X
X
X
X
X
X
X
X
X
0
X
X
X
X
X
X
X
X
X
X
X
X
0
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
Switch NO0B open (off)
Switch NO0B closed
Switch NO1B open (off)
Switch NO1B closed
Switch NO2B open (off)
Switch NO2B closed
Switch NO3B open (off)
Switch NO3B closed
Switch NO3A open (off)
Switch NO3A closed
Switch NO2A open (off)
Switch NO2A closed
Switch NO1A open (off)
Switch NO1A closed
Switch NO0A open (off)
Switch NO0A closed
1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
1
X
X
X
X
X
X
X
X
X
X
X
X
1
X
X
X
X
X
X
X
X
X
X
1
X
X
X
X
X
X
X
X
1
X
X
X
X
X
X
1
X
X
X
X
1
X
X
1
X = Don’t care. Data bit D7 is first bit in; data bit D0 is last in.
______________________________________________________________________________________ 15
S e ria lly Co n t ro lle d , Lo w -Vo lt a g e ,
8 -Ch a n n e l/Du a l 4 -Ch a n n e l Mu lt ip le x e rs
quent channel sequencing after the first eight bits have
Du a l, Diffe re n t ia l 4 -Ch a n n e l Mu lt ip le x e r
The MAX350 can be programmed normally, with only
one differential channel selected for every eight clock
pulses, or it can be programmed in a fast mode, where
channel changing occurs on each clock pulse.
been sent. For even faster channel sequencing, send
only one DIN high pulse and one CS low pulse for
every four clock pulses.
Re s e t Fu n c t io n
RESET is the internal reset pin. It is usually connected
to a logic signal or V+. Drive RESET low to open all
switches and set the contents of the internal shift regis-
ter to zero simultaneously. When RESET is high, the
part functions normally and DOUT is sourced from V+.
RESET must not be driven beyond V+ or GND.
In fast mode, select the channels by sending two high
pulses, spaced four clock pulses apart (corresponding
to the two selected channels) at DIN, and a corre -
sponding CS low pulse for each of the first eight clock
pulses. As SCLK clocks this through the register, each
switch sequences one differential channel at a time,
starting with channel 0. Repeat this process for subse-
49/MAX350
SCLK
DIN
SK
SO
DOUT
DIN
MISO
MOSI
MAX349
MAX350
MAX349
MAX350
SPI
PORT
MICROWIRE
PORT
DOUT
CS
SI
SCLK
CS
SCK
I/O
I/O
CPOL = 0, CPHA = 0
THE DOUT-SI CONNECTION IS NOT REQUIRED FOR WRITING TO THE
MAX349/MAX350, BUT MAY BE USED FOR DATA-ECHO PURPOSES.
THE DOUT-MISO CONNECTION IS NOT REQUIRED FOR WRITING TO THE
MAX349/MAX350, BUT MAY BE USED FOR DATA-ECHO PURPOSES.
Figure 3. Connections for MICROWIRE
Figure 4. Connections for SPI and QSPI
SCLK
SCLK
SCLK
SCLK
DIN
CS
MAX349
MAX350
MAX349
MAX350
MAX349
MAX350
DIN
CS
DOUT
DIN
CS
DOUT
DIN
CS
DOUT
TO OTHER
SERIAL DEVICES
Figure 5. Daisy-Chained Connection
16 ______________________________________________________________________________________
S e ria lly Co n t ro lle d , Lo w -Vo lt a g e ,
8 -Ch a n n e l/Du a l 4 -Ch a n n e l Mu lt ip le x e rs
49/MAX350
DIN
SCLK
CS1
CS2
CS3
TO OTHER
SERIAL
DEVICES
CS
CS
CS
MAX349
MAX350
MAX349
MAX350
MAX349
MAX350
SCLK
DIN
SCLK
DIN
SCLK
DIN
Figure 6. Addressable Serial Interface
Virtually all the analog leakage current is through the
ESD diodes. Although the ESD diodes on a given sig-
nal pin are identical, and therefore fairly well balanced,
they are reverse biased differently. Each is biased by
either V+ or V- and the analog signal. This means their
leakages vary as the signal varies. The difference in the
two diode leakages to the V+ and V- pins constitutes
the analog signal-path leakage current. All analog leak-
age current flows to the supply terminals, not to the
other switch terminal. This is why both sides of a given
switch can show leakage currents of either the same or
opposite polarity.
D4
D0
SCLK
SW4
SW0
DIN
FOUR CLOCK
PULSES
The re is no c onne c tion b e twe e n the a na log s ig na l
paths and GND.
Figure 7. Differential Multiplexer Input Control
V+ and GND power the internal logic and logic-level
translators, and set both the input and output logic lim-
its. The logic-level translators convert the logic levels to
switched V+ and V- signals to drive the analog signal
gates. This drive signal is the only connection between
the logic supplies (and signals) and the analog sup-
plies. V+ and V- have ESD-protection diodes to GND.
The logic-level inputs and output have ESD protection
to V+ and to GND.
P o w e r-S u p p ly Co n s id e ra t io n s
Overview
The MAX349/MAX350 construction is typical of most
CMOS analog switches. It has three supply pins: V+, V-
and GND. V+ and V- are used to drive the internal
CMOS switches, and they set the limits of the analog
voltage on any switch. Reverse ESD-protection diodes
are internally connected between each analog signal
pin and both V+ and V-. If any analog signal exceeds
V+ or V-, one of these diodes will conduct. During normal
operation, these (and other) reverse-biased ESD diodes
leak, forming the only current drawn from V+ or V-.
The logic-level thresholds are CMOS and TTL compati-
ble when V+ is +5V. As V+ rises, the threshold increases
slightly. Therefore, when V+ reaches +12V, the threshold
is about 3.1V; above the TTL-guaranteed high-level mini-
mum of 2.8V, but still compatible with CMOS outputs.
______________________________________________________________________________________ 17
S e ria lly Co n t ro lle d , Lo w -Vo lt a g e ,
8 -Ch a n n e l/Du a l 4 -Ch a n n e l Mu lt ip le x e rs
Bipolar Supplies
The MAX349/MAX350 operate with bipolar supplies
from ±3.0V and ±8V. The V+ and V- supplies need not
b e s ymme tric a l, b ut the ir s um c a nnot e xc e e d the
absolute maximum rating of 17V. Do not connect the
MAX349/MAX350 V+ to +3V and connect the logic-
level pins to TTL logic-level signals. This exceeds
the absolute maximum ratings and can damage the
part and/or external circuits.
Hig h -Fre q u e n c y P e rfo rm a n c e
In 50Ω systems, signal response is reasonably flat up
to 50MHz (s e e Typ ic a l Op e ra ting Cha ra c te ris tic s ).
Ab ove 20MHz, the on re s p ons e ha s s e ve ra l minor
peaks that are highly layout dependent. The problem is
not turning the switch on, but turning it off. The off-state
switch acts like a capacitor and passes higher frequen-
cies with less attenuation. At 10MHz, off-isolation is
about -45dB in 50Ω systems, becoming worse (approx-
imately 20dB per decade) as frequency increases.
Hig he r c irc uit imp e d a nc e s a ls o ma ke off-is ola tion
wors e . Ad ja c e nt c ha nne l a tte nua tion is a b out 3d B
above that of a bare IC socket, and is entirely due to
capacitive coupling.
Single Supply
The MAX349/MAX350 operate from single supplies
between +3V and +16V when V- is connected to GND.
All of the bipolar precautions must be observed.
49/MAX350
P in Co n fig u ra t io n s /Fu n c t io n a l Dia g ra m s (c o n t in u e d )
TOP VIEW
SCLK
V+
SCLK
V+
CS
CS
1
2
20
19
18
17
16
15
14
13
12
11
1
2
20
19
18
17
16
15
14
13
12
11
MAX349
MAX350
RESET
DOUT
V-
RESET
DOUT
V-
DIN
DIN
LOGIC
LOGIC
3
3
GND
GND
4
4
COM
NO0
NO1
NO2
COMA
NO0A
NO1A
NO2A
N.C.
N.C.
NO7
NO6
NO5
NO4
N.C.
5
5
6
COMB
NO0B
NO1B
NO2B
NO3B
6
7
7
8
8
NO3
N.C.
NO3A
N.C.
9
9
10
10
SSOP
SSOP
N.C. = NOT INTERNALLY CONNECTED
18 ______________________________________________________________________________________
S e ria lly Co n t ro lle d , Lo w -Vo lt a g e ,
8 -Ch a n n e l/Du a l 4 -Ch a n n e l Mu lt ip le x e rs
49/MAX350
Ord e rin g In fo rm a t io n (c o n t in u e d )
_________________Ch ip To p o g ra p h ie s
MAX349
CS
PART
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
0°C to +70°C
PIN-PACKAGE
18 Plastic DIP
18 Wide SO
20 SSOP
V+
MAX349EPN
MAX349EWN
MAX349EAP
MAX349MJN
MAX350CPN
MAX350CWN
MAX350CAP
MAX350C/D
MAX350EPN
MAX350EWN
MAX350EAP
MAX350MJN
DIN
DOUT
SCLK RESET
V-
18 CERDIP**
18 Plastic DIP
18 Wide SO
20 SSOP
GND
0°C to +70°C
COM
NO0
0°C to +70°C
0°C to +70°C
Dice*
NO7
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
18 Plastic DIP
18 Wide SO
20 SSOP
0. 120"
(3. 05mm)
NO1
18 CERDIP**
NO6
*
Contact factory for dice specifications.
** Contact factory for availability.
NO4
NO5
NO3
NO2
0. 100"
(2. 54mm)
MAX350
V+
CS
SCLK
DIN
RESET DOUT
V-
GND
COMA
NO0A
COMB
NO0B
0. 120"
(3. 05mm)
NO1A
NO1B
NO2A
NO3A
NO3B
NO2B
0. 100"
(2. 54mm)
TRANSISTOR COUNT: 500
SUBSTRATE CONNECTED TO V+.
______________________________________________________________________________________ 19
S e ria lly Co n t ro lle d , Lo w -Vo lt a g e ,
8 -Ch a n n e l/Du a l 4 -Ch a n n e l Mu lt ip le x e rs
________________________________________________________P a c k a g e In fo rm a t io n
49/MAX350
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
20 ____________________Ma x im In t e g ra t e d P ro d u c t s , 1 2 0 S a n Ga b rie l Drive , S u n n yva le , CA 9 4 0 8 6 4 0 8 -7 3 7 -7 6 0 0
© 1998 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
相关型号：
MAX35102ETJ+
Analog Circuit, 1 Func, CMOS, 4 X 4 MM, 0.75 MM HEIGHT, 0.40 MM PITCH, ROHS COMPLIANT, TQFN-32
MAXIM
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