ISL32457EIUZ-T7A Intersil, ISL32457EIUZ-T7A Datasheet

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ISL32457EIUZ-T7A

Manufacturer Part Number
ISL32457EIUZ-T7A
Description
RS-422/RS-485 Interface IC 60V OVP POLV -40+85 5V RS-485 1/2 DUP
Manufacturer
Intersil
Datasheet

Specifications of ISL32457EIUZ-T7A

Product Category
RS-422/RS-485 Interface IC
Rohs
yes
Data Rate
250 Kbps, 1 Mbps
Operating Supply Voltage
3.3 V to 5 V
Supply Current
4.5 mA
Operating Temperature Range
- 40 C to + 85 C
Mounting Style
SMD/SMT
Package / Case
MSOP-8
Function
Transceiver
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Shutdown
Yes
±60V Fault Protected, 3.3V to 5V, ±20V Common Mode
Range, RS-485/RS-422 Transceivers with Cable Invert
and ±15kV ESD
ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E
The ISL32450E through ISL32457E are 3.3V to 5V powered, fault
protected, extended common mode range differential transceivers
for balanced communication. The RS-485 bus pins (driver outputs
and receiver inputs) are protected against overvoltages up to
±60V, and against ±15kV ESD strikes. These transceivers operate
in environments with common mode voltages up to ±20V
(exceeds the RS-485 requirement), making this RS-485 family
one of the more robust on the market.
Transmitters are RS-485 compliant with V
1.1V differential output voltage into the RS-485 specified 54Ω
load even with V
Receiver (Rx) inputs feature a “Full Fail-Safe” design, which
ensures a logic-high Rx output if Rx inputs are floating, shorted, or
on a terminated but undriven (idle) bus. Rx full fail-safe operation
is maintained even when the Rx input polarity is switched (cable
invert function on ISL32457E).
The ISL32457E includes a cable invert function that reverses the
polarity of the Rx and Tx bus pins in case the cable is
misconnected during installation.
See Table 1 on page 2 for key features and configurations by
device number.
Related Literature
• See FN7784, “ISL32470E, ISL32472E, ISL32475E,
February 20, 2012
FN7921.0
ISL32478E: Fault Protected, Extended Common Mode Range,
RS-485/RS-422 Transceivers with ±16.5kV ESD”
FIGURE 1. EXCEPTIONAL ISL32453E RX OPERATES AT >1Mbps
20
15
10
5
0
RO
EVEN WITH ±20V COMMON MODE VOLTAGE
CC
A
B
= 3V.
TIME (200ns/DIV)
1
CC
≥ 4.5V and deliver a
VID = ±1V
2Mbps
V
CC
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
= 3V
1-888-INTERSIL or 1-888-468-3774
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
Features
• Fault Protected RS-485 Bus Pins . . . . . . . . . . . . . . Up to ±60V
• Extended Common Mode Range . . . . . . . . . . . . . . . . . . . ±20V
• ±15kV HBM ESD Protection on RS-485 Bus Pins
• Wide Supply Range . . . . . . . . . . . . . . . . . . . . . . . . . 3V to 5.5V
• Cable Invert Pin (ISL32457E Only)
• 1/4 Unit Load for Up to 128 Devices on the Bus
• High Transient Overvoltage Tolerance . . . . . . . . . . . . . . . ±80V
• Full Fail-safe (Open, Short, Terminated) RS-485 Receivers
• Choice of RS-485 Data Rates . . . . . . . . . . . . 250kbps or 1Mbps
• Low Quiescent Supply Current . . . . . . . . . . . . . . . . . . . 2.1mA
• Pb-Free (RoHS Compliant)
Applications
• Utility Meters/Automated Meter Reading Systems
• Air Conditioning Systems
• Security Camera Networks
• Building Lighting and Environmental Control Systems
• Industrial/Process Control Networks
Larger Than Required for RS-485
Corrects for Reversed Cable Connections While Maintaining Rx
Full Fail-safe Functionality
Ultra Low Shutdown Supply Current . . . . . . . . . . . . . . . 10µA
FIGURE 2. TRANSCEIVERS DELIVER SUPERIOR COMMON MODE
-20
20
12
-7
All other trademarks mentioned are the property of their respective owners.
0
STANDARD RS-485
RANGE vs STANDARD RS-485 DEVICES
TRANSCEIVER
|
Copyright Intersil Americas Inc. 2012. All Rights Reserved
ISL3245XE

Related parts for ISL32457EIUZ-T7A

ISL32457EIUZ-T7A Summary of contents

Page 1

... FIGURE 2. TRANSCEIVERS DELIVER SUPERIOR COMMON MODE CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 Intersil (and design trademark owned by Intersil Corporation or one of its subsidiaries. All other trademarks mentioned are the property of their respective owners. ISL3245XE ...

Page 2

... EIBZ ISL32455EIUZ 2455E ISL32457EIBZ 32457 EIBZ ISL32457EIUZ 2457E NOTES: 1. Add “-T*” suffix for tape and reel. Please refer to Tech Brief 2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and 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-020 ...

Page 3

ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E Pin Configurations ISL32450E, ISL32453E (14 LD SOIC) TOP VIEW GND 6 GND 7 ISL32452E, ISL32455E (8 LD SOIC MSOP) TOP VIEW ...

Page 4

ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E Pin Descriptions ISL32452E, ISL32450E, ISL32450E, ISL32455E ISL32453E, ISL32453E SOIC, PIN (14 LD SOIC) (10 LD MSOP MSOP) NAME PIN # PIN # ...

Page 5

ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E Typical Operating Circuits +3. GND 6, 7 +3. ...

Page 6

... Maximum Junction Temperature (Plastic Package +150°C Maximum Storage Temperature Range . . . . . . . . . . . . . . . -65°C to +150°C +0.3V) Pb-free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see link below CC http://www.intersil.com/pbfree/Pb-FreeReflow.asp Recommended Operating Conditions Supply Voltage (V Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C Bus Pin Common Mode Voltage Range -20V to +20V = ...

Page 7

ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E Electrical Specifications Test Conditions 3.3V +25°C (Note 9). Boldface limits apply over the operating temperature range, -40°C to +85° PARAMETER SYMBOL Input/Output Current ...

Page 8

ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E Electrical Specifications Test Conditions 3.3V +25°C (Note 9). Boldface limits apply over the operating temperature range, -40°C to +85° PARAMETER SYMBOL Driver Enable ...

Page 9

ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E Electrical Specifications Test Conditions 3.3V +25°C (Note 9). Boldface limits apply over the operating temperature range, -40°C to +85° PARAMETER SYMBOL Receiver Skew ...

Page 10

ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E Test Circuits and Waveforms SIGNAL GENERATOR FIGURE 4A. TEST CIRCUIT FIGURE 4. DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES SIGNAL Y GENERATOR PARAMETER OUTPUT ...

Page 11

ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E Test Circuits and Waveforms SIGNAL SIGNAL GENERATOR GENERATOR +1.5V FIGURE 7A. TEST CIRCUIT SIGNAL GENERATOR PARAMETER (Note 13) ...

Page 12

ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E Application Information RS-485 and RS-422 are differential (balanced) data transmission standards used for 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 ...

Page 13

... B and Z as inverting. With the invert pin high, the corresponding bus pins reverse their polarity and Z become noninverting, and A and Y become inverting. Intersil’s unique cable invert function is superior to that found on competing devices, because the Rx full fail-safe function is maintained, even when the Rx polarity is reversed. Competitor devices implement the Rx invert function simply by inverting the Rx output ...

Page 14

ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E Typical Performance Curves 20Ω 30Ω +25°C 60 +85°C +25° +85° 3. 0.5 1 1.5 2 2.5 DIFFERENTIAL ...

Page 15

ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E Typical Performance Curves 300 290 280 V = 3.3V CC 270 260 250 240 230 t PLH 220 t PHL 210 200 -40 -30 -20 - TEMPERATURE (°C) FIGURE 15. DRIVER ...

Page 16

ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E Typical Performance Curves A TIME (1µs/DIV) FIGURE 21 3.3V, DRIVER AND RECEIVER WAVEFORMS CC (ISL32450E, ISL32452E, ISL32457E ...

Page 17

... 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. ...

Page 18

ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E Package Outline Drawing M8.118 8 LEAD MINI SMALL OUTLINE PLASTIC PACKAGE Rev 4, 7/11 3.0±0. PIN TOP VIEW H 0.25 - 0.36 0. SIDE ...

Page 19

ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E Package Outline Drawing M8.15 8 LEAD NARROW BODY SMALL OUTLINE PLASTIC PACKAGE Rev 4, 1/12 INDEX AREA TOP VIEW 5.00 (0.197) 4.80 (0.189) 1.27 (0.050) 0.51(0.020) 0.33(0.013) SIDE VIEW “A 19 DETAIL ...

Page 20

ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E Mini Small Outline Plastic Packages (MSOP -B- INDEX 1 2 0.20 (0.008) AREA TOP VIEW 0.25 (0.010) GAUGE PLANE SEATING PLANE - 0.10 (0.004) b -H- - ...

Page 21

ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E Package Outline Drawing M14.15 14 LEAD NARROW BODY SMALL OUTLINE PLASTIC PACKAGE Rev 1, 10/09 14 3 PIN NO.1 ID MARK 5 0.31-0.51 0. A-B D TOP VIEW ...

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