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| 型号： | ISL4491EIB |
| 厂商： | INTERSIL CORP |
| 元件分类： | 通用总线功能 |
| 英文描述： | Low Power, High Speed and Slew Rate Limited, Full Duplex, RS-485/RS-422 Transceivers |
| 中文描述： | LINE TRANSCEIVER, PDSO14 |
| 封装： | PLASTIC, MS-012AB, SOIC-14 |
| 文件页数： | 1/12页 |
| 文件大小： | 477K |
| 代理商： | ISL4491EIB |
1
FN6074.2
ISL4489E, ISL4491E
±
15kV ESD Protected, 1/8 Unit Load, 5V,
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.
Features
Pb-free Available as an Option (RoHS Compliant)
(See Ordering Info)
RS-485 I/O Pin ESD Protection
. . . . . . . . . . . . . ±
15kV HBM
- 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) . . . . . . . . . . . up to 15Mbps
Slew Rate Limited Version for Error Free Data
Transmission (ISL4489E)
Very Low Quiescent Current:
- 140
μ
A (ISL4489E)
- 370
μ
A (ISL4491E)
-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
Overload Protection
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”
TABLE 1. SUMMARY OF FEATURES
PART
NUMBER
HALF/FULL
DUPLEX
HIGH ESD
NO. OF DEVICES
ALLOWED ON BUS
DATA RATE
(Mbps)
SLEW-RATE
LIMITED
RECEIVER/
DRIVER ENABLE
QUIESCENT
I
CC
(
μ
A)
PIN
COUNT
ISL4489E
Full
Yes
256
0.25
Yes
Yes
140
14
ISL4491E
Full
Yes
256
15
No
Yes
370
14
Data Sheet
October 27, 2004
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. 2004. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL4491EIB-T | 功能描述:IC TXRX RS-485/422 LP HS 14-SOIC RoHS:否 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:25 系列:- 类型:收发器 驱动器/接收器数:2/2 规程:RS232 电源电压:4.5 V ~ 5.5 V 安装类型:通孔 封装/外壳:16-DIP（0.300"，7.62mm） 供应商设备封装:16-PDIP 包装:管件 |
| ISL4491EIBZ | 功能描述:IC TXRX RS485/422 LP HS 14-SOIC RoHS:是 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 类型:发射器 驱动器/接收器数:4/0 规程:RS422，RS485 电源电压:4.75 V ~ 5.25 V 安装类型:表面贴装 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC 包装:带卷 (TR) |
| ISL4491EIBZ-T | 功能描述:IC TXRX RS485/422 LP HS 14-SOIC RoHS:是 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 类型:发射器 驱动器/接收器数:4/0 规程:RS422，RS485 电源电压:4.75 V ~ 5.25 V 安装类型:表面贴装 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC 包装:带卷 (TR) |
| ISL45041 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:TFT-LCD I2C Programmable VCOM Calibrator |
| ISL45041_0608 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:TFT-LCD I2C Programmable VCOM Calibrator |
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