ISL32496E Datasheet PDF


Part Number

ISL32496E

Description

(ISL32490E - ISL32498E) RS-485/RS-422 Transceivers

Manufacture

Intersil

Total Page 22 Pages
PDF Download
Download ISL32496E Datasheet PDF


Features Datasheet pdf ±60V Fault Protected, 5V, RS-485/RS-422 Transceivers with ±25V CMR and ESD Pr otection ISL32490E, ISL32492E, ISL32493 E, ISL32495E, ISL32496E, ISL32498E The ISL32490E, ISL32492E, ISL32493E, ISL324 95E, Features ISL32496E, ISL32498E are fault protected, 5V powered, differenti al transceivers that exceed the RS-485 and RS-422 standards for balanced commu nication. The RS-485 transceiver pins ( driver outputs and receiver inputs) are fault protected up to ±60V and are pr otected against ±16.5kV ESD strikes wi thout latch-up. Additionally, the exten ded common mode range allows these tran sceivers to operate in environments wit h common mode voltages up to ±25V (>2x the RS-485 requirement), making this fau.
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ISL32496E Datasheet
±60V Fault Protected, 5V, RS-485/RS-422 Transceivers
with ±25V CMR and ESD Protection
ISL32490E, ISL32492E, ISL32493E, ISL32495E, ISL32496E,
ISL32498E
The ISL32490E, ISL32492E, ISL32493E, ISL32495E,
ISL32496E, ISL32498E are fault protected, 5V powered,
differential transceivers that exceed the RS-485 and RS-422
standards for balanced communication. The RS-485 transceiver
pins (driver outputs and receiver inputs) are fault protected up to
±60V and are protected against ±16.5kV ESD strikes without
latch-up. Additionally, the extended common mode range allows
these transceivers to operate in environments with common
mode voltages up to ±25V (>2x the RS-485 requirement),
making this fault protected RS-485 family one of the most
robust on the market.
Transmitters (Tx) deliver an exceptional 2.5V (typical)
differential output voltage into the RS-485 specified 54load.
This yields better noise immunity than standard RS-485 ICs or
allows up to six 120terminations in star network topologies.
Features
• Fault Protected RS-485 Bus Pins . . . . . . . . . . . . . . Up to ±60V
• Extended Common Mode Range . . . . . . . . . . . . . . . . . . . ±25V
More than Twice the Range Required for RS-485
±16.5kV HBM ESD Protection on RS-485 Bus Pins
• 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
• High Rx IOL for Opto-Couplers in Isolated Designs
• Hot Plug Circuitry; Tx and Rx Outputs Remain Three-State
During Power-Up/Power-Down
• Choice of RS-485 Data Rates. . . . . . . . . 250kbps to 15Mbps
Receiver (Rx) inputs feature a “Full Fail-Safe” design that
ensures a logic high Rx output if Rx inputs are floating, shorted,
or on a terminated but undriven (idle) bus. Rx outputs have high
drive levels; typically, 15mA @ VOL = 1V (for opto-coupled,
isolated applications).
Half duplex (Rx inputs and Tx outputs multiplexed together)
and full duplex pinouts are available. See Table 1 on page 2 for
key features and configurations by device number.
For fault protected or wide common mode range RS-485
transceivers with cable invert (polarity reversal) pins, please
see the ISL32483E data sheet.
• Low Quiescent Supply Current . . . . . . . . . . . . . . . . . . . 2.3mA
• Ultra Low Shutdown Supply Current . . . . . . . . . . . . . . . . 10µA
Applications
• Utility Meters/Automated Meter Reading Systems
• High Node Count RS-485 Systems
• PROFIBUS™ and RS-485 Based Field Bus Networks, and
Factory Automation
• Security Camera Networks
• Building Lighting and Environmental Control Systems
• Industrial/Process Control Networks
30
B
25
A
20
VID = ±1V
15
10
5
RO
0
-5
TIME (20ns/DIV)
FIGURE 1. EXCEPTIONAL Rx OPERATES AT >15Mbps EVEN WITH
A ±25V COMMON MODE VOLTAGE
25
12
0
-7
-12
-20
-25
STANDARD RS-485
TRANSCEIVER
CLOSEST
COMPETITOR
ISL3249xE
FIGURE 2. ISL3249xE DELIVERS SUPERIOR COMMON MODE
RANGE vs STANDARD RS-485 DEVICES
March 16, 2012
FN7786.2
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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