MAX218CPP+ [MAXIM]
Line Transceiver, 1 Func, 2 Driver, 2 Rcvr, CMOS, PDIP20, PLASTIC, DIP-20;
| 型号： | MAX218CPP+ |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Line Transceiver, 1 Func, 2 Driver, 2 Rcvr, CMOS, PDIP20, PLASTIC, DIP-20 |
| 文件： | 总8页 (文件大小：94K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-0246; Rev 1; 7/95
1 .8 V t o 4 .2 5 V-P o w e re d ,
Tru e RS -2 3 2 Du a l Tra n s c e ive r
MAX218
_______________Ge n e ra l De s c rip t io n
____________________________Fe a t u re s
The MAX218 RS-232 transceiver is intended for battery-
powered EIA/TIA-232E and V.28/V.24 communications
interfaces that need two drivers and two receivers with
minimum power consumption. It provides a wide +1.8V
to +4.25V operating voltage range while maintaining
true RS-232 a nd EIA/TIA-562 volta g e le ve ls . The
MAX218 runs from two alkaline, NiCd, or NiMH cells
without any form of voltage regulator.
BETTER THAN BIPOLAR!
♦ Operates Directly from Two Alkaline, NiCd,
or NiMH Cells
♦ +1.8V to +4.25V Supply Voltage Range
♦ 120kbps Data Rate
♦ Low-Cost Surface-Mount Components
♦ Meets EIA/TIA-232E Specifications
♦ 1µA Low-Power Shutdown Mode
♦ Both Receivers Active During Low-Power Shutdown
♦ Three-State Receiver Outputs
A shutdown mode reduces current consumption to
1µA, extending battery life in portable systems. While
shut down, all receivers can remain active or can be
disabled under logic control, permitting a system incor-
p ora ting the CMOS MAX218 to monitor e xte rna l
devices while in low-power shutdown mode.
♦ Flow-Through Pinout
A guaranteed 120kbps data rate provides compatibility
with popular software for communicating with personal
computers. Three-state drivers are provided on all
receiver outputs so that multiple receivers, generally of
different interface standards, can be wire-ORed at the
UART. The MAX218 is available in 20-pin DIP, SO, and
SSOP packages.
♦ On-Board DC-DC Converters
♦ 20-Pin SSOP, Wide SO, or DIP Packages
______________Ord e rin g In fo rm a t io n
PART
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
20 Plastic DIP
20 Wide SO
20 SSOP
MAX218CPP
MAX218CWP
MAX218CAP
MAX218C/D
MAX218EPP
MAX218EWP
MAX218EAP
________________________Ap p lic a t io n s
Battery-Powered Equipment
Computers
Dice*
Printers
20 Plastic DIP
20 Wide SO
20 SSOP
Peripherals
Instruments
Modems
*Contact factory for dice specifications.
__________Typ ic a l Op e ra t in g Circ u it
__________________P in Co n fig u ra t io n
TOP VIEW
1
19
LX
N.C.
GND
V+
1
2
20
19
18
17
16
15
14
13
12
11
V+
LX
1.8V
TO
15
18
16
6
V-
V
CC
4.25V
C1+
SHDN
EN
C1+
3
MAX218
3
GND
C1-
4
ON/OFF
SHDN
T1IN
C1-
MAX218
GND
5
T1OUT
7
14
13
T1
T2
V
CC
V-
6
T2IN
T2OUT
8
9
T1IN
T2IN
T1OUT
T2OUT
R1IN
R2IN
7
R1OUT
R1IN 12
8
R1
R1OUT
R2OUT
9
R2OUT
EN
R2IN
11
10
R2
10
GND
5, 17, 20
4
ENABLE
DIP/SO/SSOP
________________________________________________________________ Maxim Integrated Products
1
Ca ll t o ll fre e 1 -8 0 0 -9 9 8 -8 8 0 0 fo r fre e s a m p le s o r lit e ra t u re .
1 .8 V t o 4 .2 5 V-P o w e re d ,
Tru e RS -2 3 2 Du a l Tra n s c e ive r
ABSOLUTE MAXIMUM RATINGS
Supply Voltages
Short-Circuit Duration, R_OUT, T_OUT to GND ....... Continuous
V
CC
....................................................................-0.3V to +4.6V
Continuous Power Dissipation (T = +70°C)
A
V+ .......................................................... (V - 0.3V) to +7.5V
V- .......................................................................+0.3V to -7.4V
Plastic DIP (derate 11.11mW/°C above +70°C) ..........889mW
Wide SO (derate 10.00mW/°C above +70°C)..............800mW
SSOP (derate 8.00mW/°C above +70°C) ...................640mW
Operating Temperature Ranges
CC
V
CC
to V-..........................................................................+12V
LX ................................................................-0.3V to (1V + V+)
Input Voltages
MAX218C_ P ..................................................... 0°C to +70°C
MAX218E_ P ................................................... -40°C to +85°C
Storage Temperature Range ........................... -65°C to +150°C
Lead Temperature (soldering, 10sec) ........................... +300°C
———–
MAX218
T_IN, EN, SHDN ................................................. -0.3V to +7V
R_IN .................................................................................±25V
Output Voltages
T_OUT.............................................................................±15V)
R_OUT....................................................-0.3V to (V + 0.3V)
CC
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.
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, VCC = 1.8V to 4.25V, C1 = 0.47µF, C2 = C3 = C4 = 1µF, L1 = 15µH, TA = TMIN to TMAX, unless otherwise noted.
Typical values are at VCC = 3.0V, TA = +25°C.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
DC CHARACTERISTICS
Operating Voltage Range
Supply Current (Note 1)
1.8
4.25
3.0
10
V
———–
No load, V = EN = SHDN = 3.0V, T = +25°C
1.9
mA
CC
A
———–
SHDN = EN = 0V, all R_INs static
———–
0.04
0.04
Shutdown Supply Current
µA
SHDN = 0V, EN = V , all R_INs static
CC
10
LOGIC
———–
Input Logic Threshold Low
Input Logic Threshold High
Input Hysteresis
T_IN, EN, SHDN
0.33 x V
V
V
CC
———–
T_IN, EN, SHDN
0.67 x V
CC
T_IN
0.1
V
———–
Input Leakage Current
Output Voltage Low
Output Voltage High
Output Leakage Current
T_IN, EN, SHDN = 0V or V
0.001
±1
µA
V
CC
R_OUT, I
R_OUT, I
= 1.0mA
= -0.4mA
0.4
OUT
OUT
V
CC
- 0.25
V
CC
- 0.08
V
R_OUT, 0V ≤ R_OUT ≤ V , EN = 0V
0.05
±10
+25
µA
CC
EIA/TIA-232E RECEIVER INPUTS
Input Voltage Range
-25
V
V
V
= 2.0V to 4.25V
= 1.8V to 4.25V
= 1.8V to 4.25V
= 1.8V to 3.6V
0.4
0.3
CC
Input Threshold Low
Input Threshold High
V
CC
V
CC
3.0
2.8
V
V
CC
Input Hysteresis
Input Resistance
0.7
5
V
-15V < R_IN < +15V
3
7
kΩ
EIA/TIA-232E TRANSMITTER OUTPUTS
Output Voltage Swing
Output Resistance
All transmitter outputs loaded with 3kΩ to ground
= 0V, -2V < T_OUT < +2V
±5
±6
V
Ω
V
CC
300
Output Short-Circuit Current
±24
±100
mA
Note 1: Entire supply current for the circuit of Figure 1.
2
_______________________________________________________________________________________
1 .8 V t o 4 .2 5 V-P o w e re d ,
Tru e RS -2 3 2 Du a l Tra n s c e ive r
MAX218
TIMING CHARACTERISTICS
(Circuit of Figure 1, VCC = 1.8V to 4.25V, C1 = 0.47µF, C2 = C3 = C4 = 1µF, L1 = 15µH, TA = TMIN to TMAX, unless otherwise noted.
Typical values are at VCC = 3.0V, T = +25°C.)
A
PARAMETER
Data Rate
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
1000pF || 3kΩ load each transmitter,
150pF load each receiver
120
kbps
Receiver Output Enable Time
Receiver Output Disable Time
Transmitter Output Enable Time
Transmitter Output Disable Time
t
90
300
500
450
ns
ns
µs
ns
ER
t
200
140
500
290
260
1.9
DR
t
ET
t
DT
t
t
150pF load
700
700
2.7
PHLR
PLHR
Receiver Propagation Delay
Transmitter Propagation Delay
ns
µs
150pF load
t
t
2500pF || 3kΩ load
2500pF || 3kΩ load
PHLT
PLHT
1.8
2.7
T
A
= +25°C, V = 3.0V, R = 3kΩ to 7kΩ,
CC
L
Transition Region Slew Rate
C
= 50pF to 2500pF, measured from
3.0
30
V/µs
L
+3V to -3V or -3V to +3V
______________________________________________________________P in De s c rip t io n
PIN
1
NAME
LX
FUNCTION
Inductor/Diode Connection Point
Not internally connected
2
N.C.
———–
SHDN
Shutdown Control. Connect to V for normal operation. Connect to GND to shut down the
CC
power supply and to disable the drivers. Receiver status is not changed by this control.
3
Receiver Output Enable Control. Connect to V for normal operation. Connect to GND to
CC
force the receiver outputs into high-Z state.
4
5, 17, 20
6
EN
GND
Ground. Connect all GND pins to ground.
Supply Voltage Input; 1.8V to 4.25V. Bypass to GND with at least 1µF. See Capacitor
Selection section.
V
CC
7, 8
9, 10
11, 12
13, 14
15
T1IN, T2IN
R1OUT, R2OUT
R2IN, R1IN
T2OUT, T1OUT
V-
Transmitter Inputs
Receiver Outputs; swing between GND and V
CC.
Receiver Inputs
Transmitter Outputs; swing between V+ and V-.
Negative Supply generated on-board
Terminals for Negative Charge-Pump Capacitor
Positive Supply generated on-board
16, 18
19
C1-, C1+
V+
_______________________________________________________________________________________
3
1 .8 V t o 4 .2 5 V-P o w e re d ,
Tru e RS -2 3 2 Du a l Tra n s c e ive r
__________________________________________Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s
(Circuit of Figure 1, V = 1.8V, all transmitter outputs loaded with 3kΩ, T = +25°C, unless otherwise noted.)
CC
A
TRANSMITTING SUPPLY CURRENT
vs. LOAD CAPACITANCE
SUPPLY CURRENT vs.
SUPPLY VOLTAGE
100
90
140
120
100
80
1 TRANSMITTER FULL DATA RATE
1 TRANSMITTER 1/8 DATA RATE
L
V
= 2.4V
CC
R
= 3kΩ + 2500pF
MAX218
80
70
60
235kbps
120kbps
TRANSMITTER 1 OPERATING
AT SPECIFIED BIT RATE,
TRANSMITTER 2 OPERATING
AT 1/16 THAT RATE.
240kbps
60
120kbps
50
40
20kbps
0kbps
40
20
20kbps
1000
30
20
0
0
2000
3000
4000 5000
1.8
2.4
3.0
3.6
4.2
LOAD CAPACITANCE (pF)
SUPPLY VOLTAGE (V)
TIME TO EXIT SHUTDOWN
(ONE TRANSMITTER HIGH,
ONE TRANSMITTER LOW)
SHDN
V
OH
2V/div
T_OUT
V
R
L
1.8V
= 3kΩ || 2500pF
CC =
V
OL
100µs/div
SLEW RATE vs.
TRANSMITTER CAPACITANCE
TRANSMITTER OUTPUT VOLTAGE vs.
LOAD CAPACITANCE AT 120kbps
12
10
8
8
6
V
OUT+
+SLEW
-SLEW
4
2
0
6
-2
-4
4
DATA RATE 120kbps,
TRANSMITTERS LOADED WITH
3kΩ PLUS INDICATED CAPACITANCE
V
OUT-
2
0
-6
-8
1000
LOAD CAPACITANCE (pF)
0
2000
3000
4000 5000
1000
LOAD CAPACITANCE (pF)
0
2000
3000
4000 5000
4
_______________________________________________________________________________________
1 .8 V t o 4 .2 5 V-P o w e re d ,
Tru e RS -2 3 2 Du a l Tra n s c e ive r
MAX218
The transmitters and receivers are guaranteed to oper-
ate at 120kbps data rates, providing compatibility with
LapLink™ and other high-speed communications soft-
ware. A shutdown mode extends battery life by reduc-
ing supply current to 0.04µA. While shut down, all
receivers can either remain active or be disabled under
logic control. With this feature, the MAX218 can be in
low-power shutdown mode and still monitor activity on
external devices. Three-state drivers are provided on
D1
1N6050
15µH
1µF
C2
19
1
V+
LX
1.8V
TO
15
18
16
6
V-
V
CC
1µF
C3
1µF
C4
4.25V
C1+
MAX218
T1
0.47µF
C1
3
both receiver outputs.
ON/OFF
SHDN
T1IN
C1-
S w it c h -Mo d e P o w e r S u p p ly
The switch-mode power supply uses a single inductor
with one diode and three small capacitors to generate
± 6.5V from a n inp ut volta g e in the 1.8V to 4.25V
range.
T1OUT
7
14
13
T2IN
T2OUT
8
9
T2
R1
R1OUT
R1IN 12
Inductor Selection
Use a 15µH inductor with a saturation current rating of at
least 350mA and less than 1Ω resistance. Table 1 lists
suppliers of inductors that meet the 15µH/350mA/1Ω
specifications.
R2OUT
R2IN
11
10
R2
EN
GND
4
5, 17, 20
ENABLE
Diode Selection
Key diode specifications are fast recovery time (<10ns),
average current rating (>100mA), and peak current rat-
ing (>350mA). Inexpensive fast silicon diodes, such as
the 1N6050, are generally recommended. More expen-
sive Schottky diodes improve efficiency and give slightly
Figure 1. Single-Supply Operation
better performance at very low V voltages. Table 1
CC
_______________De t a ile d De s c rip t io n
lists suppliers of both surface-mount and through-hole
diodes. 1N914s are usually satisfactory, but specifica-
tions and performance vary widely with different manu-
facturers.
The MAX218 line driver/receiver is intended for battery-
powered EIA/TIA-232 and V.28/V.24 communications
interfaces that require two drivers and two receivers.
The operating voltage extends from 1.8V to 4.25V, yet
the d e vic e ma inta ins true RS-232 a nd EIA/TIA-562
transmitter output voltage levels. This wide supply volt-
age range permits direct operation from a variety of
batteries without the need for a voltage regulator. For
example, the MAX218 can be run directly from a single
lithium cell or a pair of alkaline cells. It can also be run
directly from two NiCd or NiMH cells from full-charge
voltage down to the normal 0.9V/cell end-of-life point.
The 4.25V ma ximum supply volta ge a llows the two
rechargeable cells to be trickle- or fast-charged while
driving the MAX218.
Capacitor Selection
Use capacitors with values at least as indicated in
Figure 1. Capacitor C2 determines the ripple on V+,
but not the absolute voltage. Capacitors C1 and C3
determine both the ripple and the absolute voltage of
V-. Bypass V to GND with at least 1µF (C4) placed
CC
close to pins 5 and 6. If the V line is not bypassed
CC
elsewhere (e.g., at the power supply), increase C4 to
4.7µF.
You may use ceramic or polarized capacitors in all
locations. If you use polarized capacitors, tantalum
types are preferred because of the high operating fre-
quency of the power supplies (about 250kHz). If alu-
minum electrolytics are used, higher capacitance val-
ues may be required.
The circuit comprises three sections: power supply,
transmitters, and receivers. The power-supply section
converts the supplied input voltage to 6.5V, providing the
voltages necessary for the drivers to meet true RS-232
levels. External components are small and inexpensive.
™ LapLink is a trademark of Traveling Software, Inc.
_______________________________________________________________________________________
5
1 .8 V t o 4 .2 5 V-P o w e re d ,
Tru e RS -2 3 2 Du a l Tra n s c e ive r
Table 1. Suggested Component Suppliers
MANUFACTURER
PART NUMBER
PHONE
FAX
Inductors—Surface Mount
USA (404) 436-1300
Japan (075) 951-9111
USA (404) 436-3030
Japan (075) 955-6526
Murata-Erie
Sumida
TDK
LQH4N150K-TA
CD43150
USA (708) 956-0666
Japan (03) 3607-5111
USA (708) 956-0702
Japan (03) 3607-5428
MAX218
USA (708) 803-6100
Japan (03) 3278-5111
USA (708) 803-6296
Japan (03) 3278-5358
NLC453232T-150K
Diodes—Surface Mount
Central Semiconductor
Motorola
CMPSH-3, Schottky
MMBD6050LT1, Silicon
PMBD6050, Silicon
USA (516) 435-1110
USA (408) 749-0510
USA (401) 762-3800
USA (516) 435-1824
USA (408) 991-7420
USA (401) 767-4493
Philips
Diodes—Through-Hole
1N6050, Silicon
1N5817, Schottky
Motorola
USA (408) 749-0510
———–
USA (408) 991-7420
RS -2 3 2 Drive rs
The two drivers are identical, and deliver EIA/TIA-232E
and EIA/TIA-562 output voltage levels when V is
S h u t d o w n
When SHDN is low, the power supplies are disabled and
the transmitters are put into a high-impedance state.
Receiver operation is not affected by taking SHDN low.
DD
———–
between 1.8V and 4.25V. The transmitters drive up to
3kΩ in parallel with 1000pF at up to 120kbps. Connect
Power consumption is dramatically reduced in shutdown
mode. Supply current is minimized when the receiver
inputs are static in any of three states: floating (ground),
unused driver inputs to either GND or V
drivers by taking SHDN low. The transmitter outputs are
. Disable the
CC
———–
———–
forced into a high-impedance state when SHDN is low.
GND, or V .
CC
RS -2 3 2 Re c e ive rs
The two re c e ive rs a re id e ntic a l, a nd a c c e p t b oth
EIA/TIA-232E a nd EIA/TIA-562 inp ut s ig na ls . The
CMOS receiver outputs swing rail-to-rail. When EN is
__________Ap p lic a t io n s In fo rm a t io n
Op e ra t io n fro m Re g u la t e d /Un re g u la t e d
Du a l S ys t e m P o w e r S u p p lie s
The MAX218 is intended for use with three different
power-supply sources: it can be powered directly from
a battery, from a 3.0V or 3.3V power supply, or simulta-
neously from both. Figure 1 shows the single-supply
configuration. Figure 2 shows the circuit for operation
from both a 3V supply and a raw battery supply—an
ide a l c onfigura tion whe re a re g ula te d 3V sup p ly is
being derived from two cells. In this application, the
MAX218’s logic levels remain appropriate for interface
with 3V logic, yet most of the power for the MAX218 is
drawn directly from the battery, without suffering the
efficiency losses of the DC-DC converter. This pro-
longs battery life.
high, the receivers are active regardless of the state of
———–
SHDN. When EN is low, the receiver outputs are put
into a high-impedance state. This allows two RS-232
ports (or two ports of different types) to be wired-ORed
at the UART.
Op e ra t in g Mo d e s
———–
SHDN and EN determine the MAX218’s mode of opera-
tion, as shown in Table 2.
Table 2. Operating Modes
–———–
SHDN EN
RECEIVER DRIVER
OUTPUT OUTPUT CONVERTER CURRENT
DC-DC
SUPPLY
Bypass the input supplies with 0.1µF at V (C4) and at
CC
L
L
L
H
L
High-Z
Enabled
High-Z
High-Z
High-Z
OFF
OFF
ON
Minimum
Minimum
Normal
least 1µF at the inductor (C5). Increase C5 to 4.7µF if
the power supply has no other bypass capacitor con-
nected to it.
H
H
Enabled
Enabled
H
Enabled
ON
Normal
6
_______________________________________________________________________________________
1 .8 V t o 4 .2 5 V-P o w e re d ,
Tru e RS -2 3 2 Du a l Tra n s c e ive r
MAX218
power straight from the battery, but still provides logic-
level compatibility with the 3V logic.
D1
1N6050
15µH
Keep communications cables short to minimize capaci-
tive loading. Lowering the capacitive loading on the
transmitter outputs reduces the MAX218’s power con-
sumption. Using short, low-capacitance cable also
1µF
C2
3V
1µF
C5
DC-DC
19
V+
1
LX
CONVERTER
15
6
MAX878
OR
V-
V
helps transmission at the highest data rates.
CC
1µF
C3
MAX756
OR
———–
0.1µF
C4
18
16
Keep the SHDN pin low while power is being applied to
———–
C1+
MAX856
MAX218
T1
the MAX218, and take SHDN high only after V has
CC
0.47µF
C1
3
risen above about 1.5V. This avoids active operation at
very low voltages, where currents of up to 150mA can be
ON/OFF
SHDN
T1IN
C1-
drawn. This is especially important with systems pow-
T1OUT
7
14
13
———–
ered from rechargeable cells; if SHDN is high while the
cells are being trickle charged from a deep discharge,
the MAX218 could draw a significant amount of the
charging current until the battery voltage rises above
1.5V.
T2IN
T2OUT
8
9
T2
R1
R1IN 12
R1OUT
Pin Configuration Change
The Pin Configuration shows pin 2 as N.C. (no con-
nect). Early samples had a bypass capacitor for the
inte rna l re fe re nc e c onne c te d to p in 2, whic h wa s
la b e le d REF. This b yp a s s c a p a c itor p rove d to b e
unnecessary and the connection has been omitted. Pin
2 ma y now b e c onne c te d to g round , le ft op e n, or
bypassed to GND with a capacitor.
R2OUT
EN
R2IN
11
10
R2
GND
5, 17, 20
4
ENABLE
Figure 2. Operating from Unregulated and Regulated Supplies
EIA/TIA-2 3 2 E a n d
_____________EIA/TIA-5 6 2 S t a n d a rd s
RS-232 circuits consume much of their power because
the EIA/TIA-232E standard demands that the transmit-
ters deliver at least 5V to receivers with impedances
that can be as low as 3kΩ. For applications where
power consumption is critical, the EIA/TIA-562 standard
provides an alternative.
Lo w -P o w e r Op e ra t io n
The following suggestions will help you get maximum
life out of your batteries.
Shut the MAX218 down when it is not being used for
transmission. The receivers can remain active when
the MAX218 is shut down, to alert your system to exter-
nal activity.
Transmit at the highest practical data rate. Although
this raises the supply current while transmission is in
progress, the transmission will be over sooner. As long
as the MAX218 is shut down as soon as each transmis-
sion ends, this practice will save energy.
EIA/TIA-562 transmitter output voltage levels need only
reach ±3.7V, and because they have to drive the same
3kΩ receiver loads, the total power consumption is con-
s id e ra b ly re d uc e d . Sinc e the EIA/TIA-232E a nd
EIA/TIA-562 receiver input voltage thresholds are the
s a me , inte rop e ra b ility b e twe e n EIA/TIA-232E a nd
EIA/TIA-562 devices is guaranteed. Maxim’s MAX560
and MAX561 are EIA/TIA-562 transceivers that operate
on a single supply from 3.0V to 3.6V, and the MAX562
transceiver operates from 2.7V to 5.25V while produc-
ing EIA/TIA-562 levels.
Operate your whole system from the raw battery volt-
age rather than suffer the losses of a regulator or DC-
DC converter. If this is not possible, but your system is
powered from two cells and employs a 3V DC-DC con-
verter to generate the main logic supply, use the circuit
of Figure 2. This circuit draws most of the MAX218’s
_______________________________________________________________________________________
7
1 .8 V t o 4 .2 5 V-P o w e re d ,
Tru e RS -2 3 2 Du a l Tra n s c e ive r
______3 V-P o w e re d EIA/TIA-2 3 2 a n d EIA/TIA-5 6 2 Tra n s c e ive rs fro m Ma x im
No. OF
RECEIVERS
ACTIVE IN
SUPPLY
VOLTAGE TRANSMITTERS/
No. OF
GUARANTEED EIT/TIA-
PART
DATA RATE
(kbps)
232
OR 562
FEATURES
(V)
RECEIVERS
SHUTDOWN
MAX212
3.0 to 3.6
3/5
3/5
5
120
120
232
232
Drives mice
AutoShutdown, complementary receiver,
drives mice, transient detection
MAX218
MAX3212 2.7 to 3.6
MAX218 1.8 to 4.25
MAX3218 1.8 to 4.25
5
Operates directly from a battery
without a voltage regulator
2/2
2
120
232
2/2
4/5
4/5
3/5
2/2
2/2
2/2
2/2
2
2
0
5
2
2
2
2
120
120
120
230
120
120
120
120
232
562
562
562
562
232
232
232
Same as MAX218, but with AutoShutdown
Pin-compatible with MAX213
Pin-compatible with MAX214
Wide supply range
MAX560
MAX561
MAX562
MAX563
3.0 to 3.6
3.0 to 3.6
2.7 to 5.25
3.0 to 3.6
0.1µF capacitors
MAX3222 3.0 to 5.5
MAX3223 3.0 to 5.5
MAX3232 3.0 to 5.5
0.1µF capacitors
0.1µF capacitors
Pin-compatible with MAX232
0.1µF capacitors, 2 complementary
receivers, drives mice
0.1µF capacitors, AutoShutdown,
complementary receivers, drives mice
MAX3241 3.0 to 5.5
MAX3243 3.0 to 5.5
2/2
3/5
2
1
120
120
232
232
___________________Ch ip To p o g ra p h y
LX GND
V+
SHDN
C1+
EN
GND
C1-
V-
0. 101"
(2. 565mm)
GND
T1OUT
T2OUT
V
CC
T1IN
T2IN
R1OUT
R1IN
R2OUT
R2IN
0. 122"
(3. 099mm)
TRANSISTOR COUNT: 571
SUBSTRATE CONNECTED TO GND
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.
8
___________________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
© 1995 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
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