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ISL84391

更新时间： 2024-11-30 23:59:51
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17页 532K
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3.3V. Low Power. Slew Rate Limited. RS-485/RS-422 Transeivers

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ISL83483, ISL83485, ISL83488,  
ISL83490, ISL83491  
®
Data Sheet  
September 2003  
FN6052.1  
3.3V, Low Power, High Speed or Slew  
Features  
Rate Limited, RS-485/RS-422 Trans ceivers  
• Operate from a Single +3.3V Supply (10% Tolerance)  
• Interoperable with 5V Logic  
These Intersil RS-485/RS-422 devices are BiCMOS 3.3V  
powered, single transceivers that meet both the RS-485 and  
RS-422 standards for balanced communication. Unlike  
competitive devices, this Intersil family is specified for 10%  
tolerance supplies (3V to 3.6V).  
• High Data Rates. . . . . . . . . . . . . . . . . . . . . up to 10Mbps  
• Single Unit Load Allows up to 32 Devices on the Bus  
• Slew Rate Limited Versions for Error Free Data  
The ISL83483 and ISL83488 utilize slew rate limited drivers  
which reduce EMI, and minimize reflections from improperly  
terminated transmission lines, or unterminated stubs in  
multidrop and multipoint applications.  
Transmission (ISL83483, ISL83488) . . . . . .up to 250kbps  
• Low Current Shutdown Mode (ISL83483, ISL83485,  
ISL83491). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15nA  
• -7V to +12V Common Mode Input Voltage Range  
Data rates up to 10Mbps are achievable by using the  
ISL83485, ISL83490, or ISL83491, which feature higher  
slew rates.  
• Three State Rx and Tx Outputs (Except ISL83488,  
ISL83490)  
• 10ns Propagation Delay, 1ns Skew (ISL83485, ISL83490,  
ISL83491)  
Logic inputs (e.g., DI and DE) accept signals in excess of  
5.5V, making them compatible with 5V logic families.  
• Full Duplex and Half Duplex Pinouts  
Receiver (Rx) inputs feature a “fail-safe if open” design,  
which ensures a logic high output if Rx inputs are floating. All  
devices present a “single 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  
Applications  
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.  
• 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”  
The ISL83488, ISL83490, ISL83491 are configured for full  
duplex (separate Rx input and Tx output pins) applications.  
The ISL83488 and ISL83490 are offered in space saving 8  
lead packages for applications not requiring Rx and Tx  
output disable functions (e.g., point-to-point and RS-422).  
Half duplex configurations (ISL83483, ISL83485) multiplex  
the Rx inputs and Tx outputs to provide transceivers with Rx  
and Tx disable functions in 8 lead packages.  
TABLE 1. SUMMARY OF FEATURES  
PART  
NUMBER  
HALF/FULL  
DUPLEX  
DATA RATE  
(Mbps)  
SLEW-RATE RECEIVER/DRIVER QUIESCENT I  
LOW POWER  
SHUTDOWN?  
CC  
LIMITED?  
ENABLE?  
Yes  
(mA)  
0.65  
0.65  
0.65  
0.65  
0.65  
PIN COUNT  
ISL83483  
ISL83485  
ISL83488  
ISL83490  
ISL83491  
Half  
Half  
Full  
Full  
Full  
0.25  
10  
Yes  
No  
Yes  
Yes  
No  
8
8
Yes  
0.25  
10  
Yes  
No  
No  
8
No  
No  
8
10  
No  
Yes  
Yes  
14  
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.  
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.  
Copyright © Intersil Americas Inc. 2003. All Rights Reserved  
1
All other trademarks mentioned are the property of their respective owners.  
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