ISL4491E Intersil Corporation, ISL4491E Datasheet

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ISL4491E

Manufacturer Part Number
ISL4491E
Description
(ISL4489E / ISL4491E) RS-485/RS-422 Transceivers
Manufacturer
Intersil Corporation
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ISL4491EIBZ
Manufacturer:
INTERSIL
Quantity:
20 000
Part Number:
ISL4491EIBZ
Manufacturer:
INTERSIL
Quantity:
6 105
±
Low Power, High Speed and Slew Rate
Limited, Full Duplex, RS-485/RS-422
Transceivers
The ISL4489E, ISL4491E are ESD protected, “fractional”
unit load, BiCMOS, 5V powered, single transceivers that
meet both the RS-485 and RS-422 standards for balanced
communication. Each driver output and receiver input is
protected against ±15kV ESD strikes, without latch-up.
Unlike competitive versions, these Intersil devices are
specified for 10% tolerance supplies (4.5V to 5.5V).
Rx inputs and Tx outputs present a “1/8 unit load” to the
RS-485 bus, which allows a total of 256 transmitters and
receivers on the network for large node count systems.
These devices are configured for full duplex (separate Rx
input and Tx output pins) applications, so they are ideal for
RS-422 networks requiring high ESD tolerance on the bus
pins.
The ISL4489E utilizes a slew rate limited driver which
reduces EMI, and minimizes reflections from improperly
terminated transmission lines, or unterminated stubs in
multidrop and multipoint applications.
Data rates up to 15Mbps are achievable by using the
ISL4491E, which features higher slew rates.
Receiver (Rx) inputs feature a “fail-safe if open” design,
which ensures a logic high Rx output if Rx inputs are floating.
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.
NUMBER
ISL4489E
ISL4491E
15kV ESD Protected, 1/8 Unit Load, 5V,
PART
HALF/FULL
DUPLEX
Full
Full
HIGH ESD?
®
1
Yes
Yes
Data Sheet
ALLOWED ON BUS
NO. OF DEVICES
TABLE 1. SUMMARY OF FEATURES
256
256
1-888-INTERSIL or 321-724-7143
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
DATA RATE
(Mbps)
0.25
15
Features
• Pb-free Available as an Option (RoHS Compliant)
• RS-485 I/O Pin ESD Protection
• 1/8 Unit Load Allows up to 256 Devices on the Bus
• High Data Rates (ISL4491E) . . . . . . . . . . . up to 15Mbps
• Slew Rate Limited Version for Error Free Data
• Very Low Quiescent Current:
• -7V to +12V Common Mode Input Voltage Range
• Three-State Rx and Tx Outputs
• Full Duplex Pinout
• Operates from a Single +5V Supply (10% Tolerance)
• Current Limiting and Thermal Shutdown for driver
Applications
• Factory Automation
• Security Networks
• Building Environmental Control Systems
• Industrial/Process Control Networks
• Level Translators (e.g., RS-232 to RS-422)
• RS-232 “Extension Cords”
(See Ordering Info)
- Class 3 ESD Level on all Other Pins . . . . . . >7kV HBM
Transmission (ISL4489E)
- 140
- 370
Overload Protection
SLEW-RATE
LIMITED?
μ
μ
All other trademarks mentioned are the property of their respective owners.
April 28, 2006
A (ISL4489E)
A (ISL4491E)
Yes
No
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2004, 2006. All Rights Reserved.
DRIVER ENABLE?
ISL4489E, ISL4491E
RECEIVER/
Yes
Yes
. . . . . . . . . . . . . ±
QUIESCENT
I
CC
140
370
(μA)
FN6074.3
15kV HBM
COUNT
PIN
14
14

Related parts for ISL4491E

ISL4491E Summary of contents

Page 1

... RS-485 I/O Pin ESD Protection - Class 3 ESD Level on all Other Pins . . . . . . >7kV HBM • 1/8 Unit Load Allows up to 256 Devices on the Bus • High Data Rates (ISL4491E 15Mbps • Slew Rate Limited Version for Error Free Data Transmission (ISL4489E) • Very Low Quiescent Current: μ ...

Page 2

... DWG SOIC M14. SOIC M14.15 (Pb-free SOIC M14. SOIC M14.15 (Pb-free) OUTPUTS High-Z High FUNCTION ISL4489E, ISL4491E (SOIC) TOP VIEW GND ...

Page 3

... Typical Operating Circuit +5V + 0.1µ GND ISL4489E, ISL4491E ISL4489E, ISL4491E T +5V + 0.1µ GND 6, 7 FN6074.3 ...

Page 4

... V = 200mV -4mA 200mV 0.4V ≤ V ≤ 2.4V O -7V ≤ V ≤ 12V IN CM ISL4489E, DE, DI ISL4491E, DE, DI -7V ≤ V ≤ 12V (Note ≤ V ≤ θ (°C/W) JA 128 = 5V 25° TEMP (° ...

Page 5

... Receiver Enable to Output High t Receiver Enable to Output Low t Receiver Disable from Output High t Receiver Disable from Output Low t Maximum Data Rate f MAX SWITCHING CHARACTERISTICS (ISL4491E) Driver Input to Output Delay t PLH Driver Output Skew t SKEW Driver Differential Rise or Fall Time t R Driver Enable to Output High ...

Page 6

... Test Circuits and Waveforms SIGNAL GENERATOR FIGURE 2A. TEST CIRCUIT FIGURE 2. DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES 6 ISL4489E, ISL4491E FIGURE 1. DRIVER V AND 100pF L OUT (Y) DIFF C = 100pF L OUT (Z) DIFF OUT ( SKEW = | ...

Page 7

... R A SIGNAL GENERATOR FIGURE 4A. TEST CIRCUIT SIGNAL A GENERATOR PARAMETER FIGURE 5A. TEST CIRCUIT 7 ISL4489E, ISL4491E (Continued) 500Ω GND SW OUT ( (pF) L 1/0 GND 15 0 OUT (Y, Z) 1/0 GND 100 0/1 V 100 CC FIGURE 3. DRIVER ENABLE AND DISABLE TIMES 15pF FIGURE 4 ...

Page 8

... Data rates on these slew 8 ISL4489E, ISL4491E rate limited versions are a maximum of 250kbps. Outputs of ISL4491E drivers are not limited, so faster output transition times allow data rates of at least 15Mbps. Data Rate, Cables, and Terminations Twisted pair is the cable of choice for RS-485/422 networks. ...

Page 9

... ISL4489E 250 200 150 HIGH 100 100Ω DIFF 3 2 -40 0 -25 25 TEMPERATURE (°C) TEMPERATURE ISL4491E ISL4489E -40 0 -25 25 TEMPERATURE (°C) FIGURE 9. SUPPLY CURRENT vs TEMPERATURE R = 54Ω DIFF FN6074.3 ...

Page 10

... TEMPERATURE (ISL4489E PLHY 22 t PLHZ PHLY 16 -40 - TEMPERATURE (°C) FIGURE 12. DRIVER PROPAGATION DELAY vs TEMPERATURE (ISL4491E) R DIFF TIME (400ns/DIV) FIGURE 14. DRIVER AND RECEIVER WAVEFORMS, LOW TO HIGH (ISL4489E) 10 ISL4489E, ISL4491E 25°C; Unless Otherwise Specified (Continued) ...

Page 11

... Typical Performance Curves R DIFF TIME (20ns/DIV) FIGURE 16. DRIVER AND RECEIVER WAVEFORMS, LOW TO HIGH (ISL4491E) Die Characteristics SUBSTRATE POTENTIAL (POWERED UP): GND TRANSISTOR COUNT: 518 PROCESS: Si Gate BiCMOS 11 ISL4489E, ISL4491E 25°C; Unless Otherwise Specified (Continued 54Ω, C ...

Page 12

... 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 12 ISL4489E, ISL4491E M14.15 (JEDEC MS-012-AB ISSUE C) 14 LEAD NARROW BODY SMALL OUTLINE PLASTIC ...

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