ISL81485IUZ [INTERSIL]
5V, 30Mbps, RS-485/RS-422 Transceiver; 5V ， 30Mbps的， RS - 485 / RS - 422收发器
| 型号： | ISL81485IUZ |
| 厂家： | 
Intersil |
| 描述： | 5V, 30Mbps, RS-485/RS-422 Transceiver |
| 文件： | 总11页 (文件大小：378K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ISL81485
®
Data Sheet
July 2004
FN6061.1
5V, 30Mbps, RS-485/RS-422 Transceiver
Features
The Intersil ISL81485 is a BiCMOS, 5V powered, single
transceiver that meets both the RS-485 and RS-422
standards for balanced communication, and features a larger
output voltage and higher data rate to benefit high speed
applications.
• Specified for 10% Tolerance Supplies
• High Data Rates. . . . . . . . . . . . . . . . . . . . . up to 30Mbps
• Large Differential Output Voltage . . . . 2.0V(min.) into 54Ω
• Drop-In Replacement for the ADM1485
Unlike competitive devices, this Intersil transceiver is
specified for 10% tolerance supplies (4.5V to 5.5V), and it
delivers a much larger worst case differential output voltage
(2.0V compared to the typical 1.5V) over the full supply
range. The increased output voltage translates into longer
reach, or better data integrity, at the 30Mbps data rate.
• One Unit Load Allows up to 32 Devices on the Bus
• Low Quiescent Current . . . . . . . . . . . . . . . . . . . . . 800µA
• -7V to +12V Common Mode Input Voltage Range
• Three State Rx and Tx Outputs
• 15ns (Max) Propagation Delays, 5ns (Max) Skew
• Operates from a Single +5V Supply (10% Tolerance)
This device presents a “1 unit load” to the RS-485 bus, which
allows up to 32 transceivers on the network.
• Current Limiting and Thermal Shutdown for driver
Overload Protection
Receiver (Rx) inputs feature a “fail-safe if open” design,
which ensures a logic high Rx output if Rx inputs are
floating.
• Pb-free available
Driver (Tx) outputs are short circuit protected, even for
voltages exceeding the power supply voltage. Additionally,
on-chip thermal shutdown circuitry disables the Tx outputs to
prevent damage if power dissipation becomes excessive.
Applications
• SCSI “Fast 20” Drivers and Receivers
• Factory Automation
• Field Bus Networks
Ordering Information
• Security Networks
PART NO.
(BRAND)
TEMP.
RANGE ( C)
PKG.
DWG. #
o
PACKAGE
8 Ld SOIC
• Building Environmental Control Systems
• Industrial/Process Control Networks
ISL81485IB
(81485IB)
-40 to 85
M8.15
M8.15
ISL81485IBZ
(81485IB) (See Note)
-40 to 85
8 Ld SOIC
(Pb-free)
Pinout
ISL81485 (SOIC, MSOP)
ISL81485IU (1485)
-40 to 85
-40 to 85
8 Ld MSOP
M8.118
M8.118
TOP VIEW
ISL81485IUZ (1485)
(See Note)
8 Ld MSOP
(Pb-free)
RO
RE
DE
DI
1
2
3
4
8
7
6
5
V
CC
R
D
*Add “-T” suffix to part number for tape and reel packaging.
B / Z
A / Y
GND
NOTE: Intersil Pb-free products employ special Pb-free material
sets; molding compounds/die attach materials and 100% matte tin
plate termination finish, which is compatible with both SnPb and
Pb-free soldering operations. Intersil Pb-free products are MSL
classified at Pb-free peak reflow temperatures that meet or exceed
the Pb-free requirements of IPC/JEDEC J Std-020B.
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2003, 2004. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
ISL81485
Truth Table
Truth Table
TRANSMITTING
RECEIVING
INPUTS
OUTPUTS
INPUTS
OUTPUT
RE
X
DE
1
DI
1
B / Z
A / Y
RE
0
DE
0
A-B
≥ +0.2V
≤ -0.2V
Inputs Open
X
RO
0
1
1
0
1
X
1
0
0
0
0
1
X
0
X
High-Z
High-Z
0
0
1
X
High-Z
Pin Descriptions
PIN
FUNCTION
RO
RE
Receiver output: If A > B by at least 0.2V, RO is high; If A < B by 0.2V or more, RO is low; RO = High if A and B are unconnected (floating).
Receiver output enable. RO is enabled when RE is low; RO is high impedance when RE is high.
Driver output enable. The driver outputs, Y and Z, are enabled by bringing DE high. They are high impedance when DE is low.
Driver input. A low on DI forces output Y low and output Z high. Similarly, a high on DI forces output Y high and output Z low.
Ground connection.
DE
DI
GND
A/Y
B/Z
RS-485/422 level, noninverting receiver input and noninverting driver output. Pin is an input (A) if DE = 0; pin is an output (Y) if DE = 1.
RS-485/422 level, inverting receiver input and inverting driver output. Pin is an input (B) if DE = 0; pin is an output (Z) if DE = 1.
System power supply input (4.5V to 5.5V).
V
CC
Typical Operating Circuit
ISL81485
+5v
+5v
+
+
0.1µF
0.1µF
8
8
V
V
CC
CC
RO
1
2
4
DI
R
D
RE
DE
R
T
R
T
3
2
7
6
7
6
B / Z
A / Y
DE
RE
B / Z
A / Y
3
4
DI
1
RO
R
D
GND
5
GND
5
2
ISL81485
Absolute Maximum Ratings
Thermal Information
o
V
to Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V
Thermal Resistance (Typical, Note 1)
θJA ( C/W)
CC
Input Voltages
8 Ld SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . .
8 Ld MSOP Package . . . . . . . . . . . . . . . . . . . . . . . .
Maximum Junction Temperature (Plastic Package) . . . . . . . 150 C
Maximum Storage Temperature Range. . . . . . . . . . -65 C to 150 C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300 C
105
140
DI, DE, RE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to 7V
Input / Output Voltages
A/Y, B/Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -8V to +12.5V
RO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to (V
Short Circuit Duration
Y, Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous
o
o
o
o
+0.5V)
CC
(Lead Tips Only)
Operating Conditions
Temperature Range
ISL81485IX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40 C to 85 C
o
o
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE:
1. θ is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
JA
o
Electrical Specifications Test Conditions: V = 4.5V to 5.5V; Unless Otherwise Specified. Typicals are at V
= 5V, T = 25 C,
CC
CC
A
Note 2
TEMP
o
PARAMETER
SYMBOL
TEST CONDITIONS
( C)
MIN
TYP
MAX UNITS
DC CHARACTERISTICS
Driver Differential V
(no load)
V
V
Full
Full
Full
Full
Full
-
2.5
2
-
3
V
V
V
V
V
V
OUT
OUT
OD1
OD2
CC
-
Driver Differential V
(with load)
R = 50Ω (RS-422) (Figure 1A)
R = 27Ω (RS-485) (Figure 1A)
2.5
-
5
-
R
= 60Ω, -7V ≤ V
≤ 12V (Figure 1B)
CM
1.5
-
D
Change in Magnitude of Driver
Differential V for
∆V
R = 27Ω or 50Ω (Figure 1A)
0.01
0.2
OD
OUT
Complementary Output States
Driver Common-Mode V
V
R = 27Ω or 50Ω (Figure 1A)
R = 27Ω or 50Ω (Figure 1A)
Full
Full
-
-
-
3
V
V
OUT
Change in Magnitude of Driver
Common-Mode V for
OC
∆V
0.01
0.2
OC
OUT
Complementary Output States
Logic Input High Voltage
Logic Input Low Voltage
Logic Input Current
V
DE, DI, RE
DE, DI, RE
DE, DI, RE
Full
Full
Full
Full
Full
Full
2
-
-
-
-
-
-
-
-
0.8
1
V
V
IH
V
IL
I
-1
µA
mA
mA
V
IN1
Input Current (A/Y, B/Z) (Note 5)
I
DE = 0V, V
4.5 to 5.5V
= 0V or
V
V
= 12V
= -7V
-
1
IN2
CC
IN
IN
-0.8
-0.2
-
Receiver Differential Threshold
Voltage
V
-7V ≤ V
≤ 12V
0.2
TH
CM
Receiver Input Hysteresis
∆V
V
= 0V
25
-
4
-
40
-
-
-
mV
V
TH
CM
Receiver Output High Voltage
Receiver Output Low Voltage
V
I
I
= -4mA, V = 200mV
ID
Full
Full
Full
OH
O
O
V
= -4mA, V = 200mV
ID
-
0.4
±1
V
OL
Three-State (high impedance)
Receiver Output Current
I
0.4V ≤ V ≤ 2.4V
-
-
µA
OZR
O
Receiver Input Resistance
R
-7V ≤ V
≤ 12V
Full
Full
Full
Full
12
-
-
1
-
kΩ
mA
mA
mA
IN
CM
No-Load Supply Current, Note 3
I
DI, RE = 0V or V
DE = V
2.2
1
CC
CC
CC
DE = 0V
DE = V , -7V ≤ V or V ≤ 12V (Note 4)
-
0.8
-
Driver Short-Circuit Current,
I
60
250
OSD1
CC
Y
Z
V
= High or Low
O
3
ISL81485
o
Electrical Specifications Test Conditions: V = 4.5V to 5.5V; Unless Otherwise Specified. Typicals are at V
= 5V, T = 25 C,
A
CC
CC
Note 2 (Continued)
TEMP
o
PARAMETER
SYMBOL
TEST CONDITIONS
( C)
MIN
TYP
MAX UNITS
Receiver Short-Circuit Current
SWITCHING CHARACTERISTICS
Driver Input to Output Prop Delay
Driver Prop Delay Skew
I
0V ≤ V ≤ V
CC
Full
7
-
85
mA
OSR
O
t
, t
PLH PHL
R
R
R
C
C
= 54Ω, C = 100pF (Figure 2)
Full
Full
Full
Full
Full
Full
2
-
9
1
5
9
9
1
15
5
ns
ns
ns
ns
ns
ns
DIFF
DIFF
DIFF
L
t
= 54Ω, C = 100pF (Figure 2)
L
SKEW
t , t
Driver Differential Rise or Fall Time
Driver Enable to Output High
Driver Enable to Output Low
Matched Enable Switching
= 54Ω, C = 100pF (Figure 2)
-
15
25
25
3
R
F
L
t
= 50pF, SW = GND (Figure 3)
-
ZH
L
L
t
= 50pF, SW = V
(Figure 3)
CC
-
ZL
∆t
(Figure 3)
-
EN
|t
- t
| or |t
- t |
AZH BZL
BZH AZL
Driver Disable from Output High
Driver Disable from Output Low
Matched Disable Switching
t
C
C
= 50pF, SW = GND (Figure 3)
Full
Full
Full
-
-
-
9
9
2
25
25
5
ns
ns
ns
HZ
L
t
= 50pF, SW = V
(Figure 3)
CC
LZ
L
∆t
(Figure 3)
DIS
|t
- t
AHZ BLZ
| or |t
- t |
BHZ ALZ
Driver Maximum Data Rate
f
|V | ≥ 1.5V (Figure 4)
Full
Full
30
8
-
-
Mbps
ns
MAXD
OD
Receiver Input to Output Prop
Delay
t
, t
PLH PHL
(Figure 5)
17
30
Receiver Prop Delay Skew
t
(Figure 5)
Full
-
1
5
ns
SKD
| t
- t |
PLH PHL
Receiver Enable to Output High
Receiver Enable to Output Low
Receiver Disable from Output High
Receiver Disable from Output Low
Receiver Maximum Data Rate
NOTES:
t
C
C
C
C
C
= 15pF, SW = GND (Figure 6)
Full
Full
Full
Full
Full
-
-
7
7
7
7
-
20
20
20
20
-
ns
ns
ZH
L
L
L
L
L
t
= 15pF, SW = V
(Figure 6)
ZL
CC
= 15pF, SW = GND (Figure 6)
= 15pF, SW = V (Figure 6)
t
-
ns
HZ
t
-
ns
LZ
CC
= 15pF, V ≥ 1.5V, RO t and t ≥ 20ns
f
30
Mbps
MAXR
ID
H
L
2. All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to device ground unless
otherwise specified.
3. Supply current specification is valid for loaded drivers when DE = 0V.
4. Applies to peak current. See “Typical Performance Curves” for more information.
5. Devices meeting these limits are denoted as “1 unit load (UL)” transceivers. The RS-485 standard allows up to 32 Unit Loads on the bus, so a
1UL transceiver permits > 32 devices on the bus.
Test Circuits and Waveforms
R
375Ω
DE
DI
DE
DI
V
V
CC
CC
Z
Y
Z
Y
V
CM
R
= 60Ω
V
V
OD
D
D
D
OD
-7V to +12V
V
R
375Ω
OC
FIGURE 1B. V
OD
WITH COMMON MODE LOAD
FIGURE 1A. V
OD
AND V
OC
FIGURE 1. DC DRIVER TEST CIRCUITS
4
ISL81485
Test Circuits and Waveforms (Continued)
3V
0V
DI
1.5V
PLH
1.5V
PHL
t
t
t
V
OH
C
= 100pF
50%
50%
50%
L
OUT (Y)
OUT (Z)
DE
DI
V
V
OL
CC
Z
Y
t
R
PHL
PLH
DIFF
D
V
C
= 100pF
OH
L
50%
90%
SIGNAL
GENERATOR
V
OL
+V
OD
90%
10%
DIFF OUT (Y - Z)
10%
-V
OD
t
t
R
F
SKEW = |CROSSING PT. OF Y↑ & Z↓ - CROSSING PT. OF Y↓ & Z↑|
FIGURE 2A. TEST CIRCUIT
FIGURE 2B. MEASUREMENT POINTS
FIGURE 2. DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES
DE
DI
3V
0V
Z
Y
110Ω
DE
1.5V
1.5V
HZ
V
CC
D
GND
SW
SIGNAL
GENERATOR
C
t
ZH
L
t
OUTPUT HIGH
2.3V
V
OH
V
- 0.5V
OH
OUT (Y, Z)
OUT (Y, Z)
0V
PARAMETER OUTPUT
RE
DI
SW
C
L
(pF)
t
Y / Z
Y / Z
Y / Z
Y / Z
X
X
X
X
1 / 0
0 / 1
1 / 0
0 / 1
GND
50
50
50
50
t
HZ
ZL
t
LZ
t
V
V
LZ
CC
CC
t
GND
2.3V
ZH
V
+ 0.5V
V
OL
OL
t
V
CC
ZL
OUTPUT LOW
FIGURE 3A. TEST CIRCUIT
FIGURE 3B. MEASUREMENT POINTS
FIGURE 3. DRIVER ENABLE AND DISABLE TIMES
C
= 100pF
= 100pF
L
DE
DI
V
CC
3V
0V
Z
Y
DI
R
DIFF
D
C
L
SIGNAL
GENERATOR
+V
OD
DIFF OUT (Y - Z)
0V
-V
OD
FIGURE 4A. TEST CIRCUIT
FIGURE 4B. MEASUREMENT POINTS
FIGURE 4. DRIVER DATA RATE
5
ISL81485
Test Circuits and Waveforms (Continued)
RE
3V
0V
15pF
A
B
1.5V
PLH
1.5V
PHL
+1.5V
RO
R
A
t
t
V
SIGNAL
GENERATOR
CC
50%
50%
RO
0V
FIGURE 5A. TEST CIRCUIT
FIGURE 5B. MEASUREMENT POINTS
FIGURE 5. RECEIVER PROPAGATION DELAY
3V
RE
RE
1.5V
1.5V
HZ
B
1kΩ
V
CC
RO
R
0V
GND
SW
SIGNAL
GENERATOR
t
A
ZH
t
15pF
OUTPUT HIGH
1.5V
V
OH
V
- 0.5V
OH
RO
RO
0V
PARAMETER
DE
0
A
SW
GND
t
ZL
t
LZ
t
+1.5V
-1.5V
+1.5V
-1.5V
HZ
V
CC
t
0
V
CC
LZ
1.5V
t
0
GND
ZH
V
+ 0.5V
OL
V
OL
t
0
V
OUTPUT LOW
ZL
CC
FIGURE 6A. TEST CIRCUIT
FIGURE 6B. MEASUREMENT POINTS
FIGURE 6. RECEIVER ENABLE AND DISABLE TIMES
Receiver Features
Application Information
This device utilizes a differential input receiver for maximum
noise immunity and common mode rejection. Input sensitivity
is ±200mV, as required by the RS422 and RS-485
specifications.
RS-485 and RS-422 are differential (balanced) data
transmission standards for use in long haul or noisy
environments. RS-422 is a subset of RS-485, so RS-485
transceivers are also RS-422 compliant. RS-422 is a point-
to-multipoint (multidrop) standard, which allows only one
driver and up to 10 (assuming one unit load devices)
receivers on each bus. RS-485 is a true multipoint standard,
which allows up to 32 one unit load devices (any
combination of drivers and receivers) on each bus. To allow
for multipoint operation, the RS-485 spec requires that
drivers must handle bus contention without sustaining any
damage.
Receiver input resistance surpasses the RS-422 spec of
4kΩ, and meets the RS-485 “Unit Load” requirement of 12kΩ
minimum, thereby allowing up to 32 devices on a bus.
Receiver inputs function with common mode voltages as
great as 7V outside the power supplies (i.e., +12V and -7V),
making them ideal for long networks, or industrial
applications, where induced voltages are a definite concern.
The receiver includes a “fail-safe if open” function that
guarantees a high level receiver output if the receiver inputs
are unconnected (floating).
Another important advantage of RS-485 is the extended
common mode range (CMR), which specifies that the driver
outputs and receiver inputs withstand signals that range from
+12V to -7V. RS-422 and RS-485 are intended for runs as
long as 4000’, so the wide CMR is necessary to handle
ground potential differences, as well as voltages induced in
the cable by external fields.
The receiver easily meets the data rate supported by the
driver, and receiver outputs are three-statable via the active
low RE input.
6
ISL81485
Proper termination is imperative, when using a 30Mbps
Driver Features
device, to minimize reflections. In point-to-point, or point-to-
multipoint (single driver on bus) networks, the main cable
should be terminated in its characteristic impedance
(typically 120Ω) at the end farthest from the driver. In multi-
receiver applications, stubs connecting receivers to the main
cable should be kept as short as possible. Multipoint (multi-
driver) systems require that the main cable be terminated in
its characteristic impedance at both ends. Stubs connecting
a transceiver to the main cable should be kept as short as
possible.
The RS-485, RS-422 driver is a differential output device that
delivers at least 2V across a 54Ω load (RS-485), and at least
2.5V across a 100Ω load (RS-422) even with V
= 4.5V.
CC
The drivers feature low propagation delay skew to maximize
bit width, and to minimize EMI.
The driver is three-statable via the active high DE input.
Outputs of the driver are not slew rate limited, so faster
output transition times allow data rates of at least 30Mbps.
Data Rate, Cables, and Terminations
Built-In Driver Overload Protection
RS-485/RS-422 are intended for network lengths up to
4000’, but the maximum system data rate decreases as the
transmission length increases. Devices operating at 30Mbps
usually are limited to lengths of a couple hundred feet, but
the larger differential output voltage of this transceiver allows
that distance to be pushed past 350’. Figure 7 illustrates the
30Mbps performance of the ISL81485 driving 350’ of CAT5
cable, terminated in 120Ω at both the driver and receiver
ends. As shown, the differential signal (A-B) delivered to the
receiver inputs at the end of the cable is still greater than
1.5V (i.e., 7.5 times the required Rx sensitivity). Thus, even
longer cables can be driven if lower noise margins are
acceptable.
As stated previously, the RS-485 spec requires that drivers
survive worst case bus contentions undamaged. The
ISL81485 meets this requirement via driver output short
circuit current limits, and on-chip thermal shutdown circuitry.
The driver output stages incorporate short circuit current
limiting circuitry which ensures that the output current never
exceeds the RS-485 spec, even at the common mode
voltage range extremes.
In the event of a major short circuit condition, the device also
includes a thermal shutdown feature that disables the drivers
whenever the die temperature becomes excessive. This
eliminates the power dissipation, allowing the die to cool.
The drivers automatically reenable after the die temperature
drops about 15 degrees. If the contention persists, the
thermal shutdown/reenable cycle repeats until the fault is
cleared. Receivers stay operational during thermal
shutdown.
Twisted pair is the cable of choice for RS-485, RS-422
networks. Twisted pair cables tend to pick up noise and other
electromagnetically induced voltages as common mode
signals, which are effectively rejected by the differential
receivers in these ICs.
o
Typical Performance Curves V = 5V, T = 25 C; Unless Otherwise Specified
CC
A
160
140
120
100
80
DI = 30Mbps
5
0
Y OR Z = LOW
5
0
60
RO
40
20
0
DRIVER+CABLE DELAY (~490ns)
-20
-40
3
1.5
0
Y OR Z = HIGH
-60
-80
A - B
-100
-120
-140
-1.5
-3
-160
-7 -6
-4
-2
0
2
4
6
8
10
12
TIME (20ns/DIV)
OUTPUT VOLTAGE (V)
FIGURE 7. DRIVER AND RECEIVER WAVEFORMS DRIVING
350 FEET (107 METERS) OF CAT5 CABLE
(DOUBLE TERMINATED WITH 120Ω)
FIGURE 8. DRIVER OUTPUT CURRENT vs SHORT CIRCUIT
VOLTAGE
7
ISL81485
o
Typical Performance Curves V = 5V, T = 25 C; Unless Otherwise Specified (Continued)
CC
A
4
3.8
3.6
3.4
3.2
3
120
100
80
60
40
20
0
R
= 100Ω
DIFF
R
= 54Ω
DIFF
2.8
0
1
2
3
4
5
-40
0
50
85
-25
25
75
o
DIFFERENTIAL OUTPUT VOLTAGE (V)
TEMPERATURE ( C)
FIGURE 9. DRIVER OUTPUT CURRENT vs DIFFERENTIAL
OUTPUT VOLTAGE
FIGURE 10. DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs
TEMPERATURE
12
3
R
= 54Ω
DIFF
R
= 54Ω
DIFF
2.5
2
11
10
9
|t | = PW Distortion
- t
PHL(Y or Z) PLH(Y or Z)
t
PLHZ
t
PLHY
1.5
1
|t
- t
| or |t
- t
|
PHLY PLHZ
PLHY PHLZ
t
PHLY
t
PHLZ
8
0.5
7
-40
0
-40
0
50
85
-25
25
75
0
50
85
-25
25
o
75
o
TEMPERATURE ( C)
TEMPERATURE ( C)
FIGURE 11. DRIVER PROPAGATION DELAY vs
TEMPERATURE
FIGURE 12. DRIVER SKEW AND PULSE DISTORTION vs
TEMPERATURE
R
= 54Ω, C = 15pF
L
R
= 54Ω, C = 15pF
DIFF
DIFF
L
5
0
5
0
DI
DI
5
0
5
0
RO
RO
5
5
4
3
2
1
0
4
3
2
1
0
B/Z
A/Y
A/Y
B/Z
TIME (10ns/DIV)
TIME (10ns/DIV)
FIGURE 13. DRIVER AND RECEIVER WAVEFORMS,
LOW TO HIGH
FIGURE 14. DRIVER AND RECEIVER WAVEFORMS,
HIGH TO LOW
8
ISL81485
o
Typical Performance Curves V = 5V, T = 25 C; Unless Otherwise Specified (Continued)
CC
A
950
900
850
800
750
700
DE = V , RE = X
CC
DE = GND, RE = X
-40
0
50
85
-25
25
o
75
TEMPERATURE ( C)
FIGURE 15. SUPPLY CURRENT vs TEMPERATURE
Die Characteristics
SUBSTRATE POTENTIAL (POWERED UP):
GND
TRANSISTOR COUNT:
528
PROCESS:
Si Gate BiCMOS
9
ISL81485
Mini Small Outline Plastic Packages (MSOP)
N
M8.118 (JEDEC MO-187AA)
8 LEAD MINI SMALL OUTLINE PLASTIC PACKAGE
INCHES
MILLIMETERS
E1
E
SYMBOL
MIN
MAX
MIN
0.94
0.05
0.75
0.25
0.09
2.95
2.95
MAX
1.10
0.15
0.95
0.36
0.20
3.05
3.05
NOTES
A
A1
A2
b
0.037
0.002
0.030
0.010
0.004
0.116
0.116
0.043
0.006
0.037
0.014
0.008
0.120
0.120
-
-B-
0.20 (0.008)
INDEX
AREA
1 2
A
B
C
-
-
TOP VIEW
4X θ
9
0.25
(0.010)
R1
c
-
R
GAUGE
PLANE
D
3
E1
e
4
SEATING
PLANE
L
0.026 BSC
0.65 BSC
-
-C-
4X θ
L1
A
A2
E
0.187
0.016
0.199
0.028
4.75
0.40
5.05
0.70
-
L
6
SEATING
PLANE
L1
N
0.037 REF
0.95 REF
-
0.10 (0.004)
-A-
C
C
b
8
8
7
-H-
A1
e
R
0.003
0.003
-
-
0.07
0.07
-
-
-
D
0.20 (0.008)
C
R1
0
-
o
o
o
o
5
15
5
15
-
a
SIDE VIEW
C
L
o
o
o
o
0
6
0
6
-
α
E
1
-B-
Rev. 2 01/03
0.20 (0.008)
C
D
END VIEW
NOTES:
1. These package dimensions are within allowable dimensions of
JEDEC MO-187BA.
2. Dimensioning and tolerancing per ANSI Y14.5M-1994.
3. Dimension “D” does not include mold flash, protrusions or gate
burrs and are measured at Datum Plane. Mold flash, protrusion
and gate burrs shall not exceed 0.15mm (0.006 inch) per side.
4. Dimension “E1” does not include interlead flash or protrusions
- H -
and are measured at Datum Plane.
Interlead flash and
protrusions shall not exceed 0.15mm (0.006 inch) per side.
5. Formed leads shall be planar with respect to one another within
0.10mm (0.004) at seating Plane.
6. “L” is the length of terminal for soldering to a substrate.
7. “N” is the number of terminal positions.
8. Terminal numbers are shown for reference only.
9. Dimension “b” does not include dambar protrusion. Allowable
dambar protrusion shall be 0.08mm (0.003 inch) total in excess
of “b” dimension at maximum material condition. Minimum space
between protrusion and adjacent lead is 0.07mm (0.0027 inch).
- B -
to be determined at Datum plane
-A -
10. Datums
and
.
- H -
11. Controlling dimension: MILLIMETER. Converted inch dimen-
sions are for reference only.
10
ISL81485
Small Outline Plastic Packages (SOIC)
M8.15 (JEDEC MS-012-AA ISSUE C)
8 LEAD NARROW BODY SMALL OUTLINE PLASTIC
PACKAGE
N
INDEX
AREA
0.25(0.010)
M
B M
H
E
INCHES
MILLIMETERS
-B-
SYMBOL
MIN
MAX
MIN
1.35
0.10
0.33
0.19
4.80
3.80
MAX
1.75
0.25
0.51
0.25
5.00
4.00
NOTES
A
A1
B
C
D
E
e
0.0532
0.0040
0.013
0.0688
0.0098
0.020
-
1
2
3
L
-
9
SEATING PLANE
A
0.0075
0.1890
0.1497
0.0098
0.1968
0.1574
-
-A-
o
h x 45
D
3
4
-C-
α
µ
0.050 BSC
1.27 BSC
-
e
A1
H
h
0.2284
0.0099
0.016
0.2440
0.0196
0.050
5.80
0.25
0.40
6.20
0.50
1.27
-
C
B
0.10(0.004)
5
0.25(0.010) M
C A M B S
L
6
N
α
8
8
7
NOTES:
o
o
o
o
0
8
0
8
-
1. Symbols are defined in the “MO Series Symbol List” in Section 2.2 of
Publication Number 95.
Rev. 0 12/93
2. Dimensioning and tolerancing per ANSI Y14.5M-1982.
3. Dimension “D” does not include mold flash, protrusions or gate burrs.
Mold flash, protrusion and gate burrs shall not exceed 0.15mm (0.006
inch) per side.
4. Dimension “E” does not include interlead flash or protrusions. Inter-
lead flash and protrusions shall not exceed 0.25mm (0.010 inch) per
side.
5. The chamfer on the body is optional. If it is not present, a visual index
feature must be located within the crosshatched area.
6. “L” is the length of terminal for soldering to a substrate.
7. “N” is the number of terminal positions.
8. Terminal numbers are shown for reference only.
9. The lead width “B”, as measured 0.36mm (0.014 inch) or greater
above the seating plane, shall not exceed a maximum value of
0.61mm (0.024 inch).
10. Controlling dimension: MILLIMETER. Converted inch dimensions
are not necessarily exact.
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.
Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
11
相关型号：
ISL81487
1/8 Unit Load, 5V, Low Power, High Speed or Slew Rate Limited, RS-485/RS-422 Transceivers
INTERSIL
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