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ISL32496EIUZ Datasheet, PDF (1/22 Pages) Intersil Corporation – ±60V Fault Protected, 5V, RS-485/RS-422 Transceivers with ±25V CMR and ESD Protection | |||
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±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 54⦠load.
This yields better noise immunity than standard RS-485 ICs or
allows up to six 120⦠terminations 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 âFull Fail-Safeâ 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
1
FN7786.2
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 |Copyright Intersil Americas Inc. 2011, 2012. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
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