Datasheet > ISL81487IBZ

ISL81487IBZ

更新时间： 2024-11-24 03:11:07

品牌	Logo	应用领域
英特矽尔 - INTERSIL		/
页数	文件大小	规格书
13页	454K
描述
1/8 Unit Load, 5V, Low Power, High Speed or Slew Rate Limited, RS-485/RS-422 Transceivers

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ISL81487IBZ 数据手册

ISL8487, ISL81483, ISL81487

Data Sheet

July 31, 2006

FN6050.7

1/8 Unit Load, 5V, Low Power, High Speed

or Slew Rate Limited, RS-485/RS-422

Transceivers

Features

• Fractional Unit Load Allows up to 256 Devices on the Bus

• Specified for 10% Tolerance Supplies

These Intersil RS-485/RS-422 devices are “fractional” unit

load (UL), BiCMOS, 5V 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 (4.5V to 5.5V).

• Class 3 ESD Protection (HBM) on all Pins. . . . . . . . >7kV

• High Data Rate Version (ISL81487). . . . . . . up to 5Mbps

• Slew Rate Limited Versions for Error Free Data

Transmission (ISL8487, ISL81483) . . . . . . .up to 250kbps

The ISL81483 and ISL81487 present a 1/8 unit load to the

RS-485 bus, which allows up to 256 transceivers on the

network for large node count systems (e.g., process

automation, remote meter reading systems). The 1/4 UL

ISL8487 allows up to 128 transceivers on the bus. In a

remote utility meter reading system, individual (apartments

for example) utility meter readings are routed to a

concentrator via an RS-485 network, so the high allowed

node count minimizes the number of repeaters required to

network all the meters. Data for all meters is then read out

from the concentrator via a single access port, or a wireless

link.

• Low Current Shutdown Mode (Except ISL81487) . . 0.5μA

• Low Quiescent Supply Current:

- ISL8487, ISL81483. . . . . . . . . . . . . . . . . . 145μA (Max.)

- ISL81487 . . . . . . . . . . . . . . . . . . . . . . . . . 420μA (Max.)

• -7V to +12V Common Mode Input Voltage Range

• Three State Rx and Tx Outputs

• 30ns Propagation Delays, 5ns Skew (ISL81487)

• Half Duplex Pinouts

• Operate from a Single +5V Supply (10% Tolerance)

Slew rate limited drivers on the ISL8487 and ISL81483

reduce EMI, and minimize reflections from improperly

terminated transmission lines, or unterminated stubs in

multidrop and multipoint applications. Data rates up to

250kbps are achievable with these devices.

• Current Limiting and Thermal Shutdown for Driver

Overload Protection

• Drop-In Replacements for: MAX487 (ISL8487); MAX1483

(ISL81483); MAX1487, LMS1487 (ISL81487)

• Pb-Free Plus Anneal Available (RoHS Compliant)

Data rates up to 5Mbps are achievable by using the

ISL81487, which features higher slew rates.

Applications

Receiver (Rx) inputs feature a “fail-safe if open” design,

which ensures a logic high Rx output if Rx inputs are

floating.

• High Node Count Networks

• Automated Utility Meter Reading Systems

• Factory Automation

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.

• Security Networks

• Building Environmental Control Systems

• Industrial/Process Control Networks

These half duplex devices multiplex the Rx inputs and Tx

outputs to allow transceivers with Rx and Tx disable

functions in 8 lead packages.

TABLE 1. SUMMARY OF FEATURES

PART

NUMBER

HALF/FULL

DUPLEX

NO. OF DEVICES

ALLOWED ON BUS

DATA RATE SLEW-RATE

RECEIVER/

DRIVER ENABLE?

QUIESCENT LOW POWER

(Mbps)

0.25

LIMITED?

(μA) SHUTDOWN? COUNT

120

ISL8487

ISL81483

ISL81487

Half

128

256

Yes

120

350

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.

All other trademarks mentioned are the property of their respective owners.

12 3 4 5 6 7...13

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与ISL81487IBZ相关器件

型号	品牌	获取价格	描述	数据表
ISL81487IP	INTERSIL	获取价格	1/8 Unit Load, 5V, Low Power, High Speed or Slew Rate Limited, RS-485/RS-422 Transceivers
ISL81487IPZ	RENESAS	获取价格	LINE TRANSCEIVER, PDIP8, ROHS COMPLIANT, PLASTIC, MS-001BA, DIP-8
ISL81487IPZ	INTERSIL	获取价格	1/8 Unit Load, 5V, Low Power, High Speed or Slew Rate Limited, RS-485/RS-422 Transceivers
ISL81487L	INTERSIL	获取价格	【15kV ESD Protected, 1/8 Unit Load, 5V, Low P
ISL81487L	RENESAS	获取价格	5V, Half Duplex, 250kbps Slew Rate Limited, ±
ISL81487LIB	INTERSIL	获取价格	【15kV ESD Protected, 1/8 Unit Load, 5V, Low P
ISL81487LIB*	INTERSIL	获取价格	【15kV ESD Protected, 1/8 Unit Load, 5V, Low P
ISL81487LIB-T	INTERSIL	获取价格	【15kV ESD Protected, 1/8 Unit Load, 5V, Low P
ISL81487LIBZ	INTERSIL	获取价格	【15kV ESD Protected, 1/8 Unit Load, 5V, Low P
ISL81487LIBZ*	INTERSIL	获取价格	【15kV ESD Protected, 1/8 Unit Load, 5V, Low P

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