Datasheet > ISL81487L

ISL81487L

更新时间： 2024-11-28 14:57:19

品牌	Logo	应用领域
瑞萨 - RENESAS		/
页数	文件大小	规格书
16页	821K
描述
5V, Half Duplex, 250kbps Slew Rate Limited, ±15kV ESD Protected, RS-485/RS-422 Transceiver

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ISL81487L 数据手册

DATASHEET

ISL8487E, ISL81487L, ISL81487E

±15kV ESD Protected, 1/8 Unit Load, 5V, Low Power, High Speed or Slew Rate

Limited RS-485/RS-422 Transceivers

FN6051

Rev.8.00

Sep 20, 2018

The ISL8487E, ISL81487L, and ISL81487E RS-485/RS-422

devices are ESD protected, fractional unit load (UL),

Features

• RS-485 I/O pin ESD protection . . . . . . . . . . . ±15kV HBM

- Class 3 ESD level on all other pins . . . . . . . >7kV HBM

BiCMOS, 5V powered, single transceivers that meet both

the RS-485 and RS-422 standards for balanced

communication. Each driver output/receiver input is

protected against ±15kV ESD strikes without latch-up. Unlike

competitive devices, this device family is specified for 10%

tolerance supplies (4.5V to 5.5V).

• Fractional unit load allows up to 256 devices on the bus

• Specified for 10% tolerance supplies

• High data rate version (ISL81487E). . . . . . . up to 5Mbps

• Slew rate limited versions for error free data

transmission (ISL8487E, ISL81487L) . . . . .up to 250kbps

All devices 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 (for example, process automation and remote

meter reading systems). In a remote utility meter reading

system, individual utility meter readings (in apartments, for

example) are routed to a concentrator with 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 from a

single access port or a wireless link.

• Low current shutdown mode (except ISL81487E) . . . 0.5µA

• Low quiescent supply current:

- ISL8487E, ISL81487L . . . . . . . . . . . 145µA (maximum)

- ISL81487E . . . . . . . . . . . . . . . . . . . . 420µA (maximum)

• -7V to +12V common mode input voltage range

• Three state Rx and Tx outputs

• 30ns propagation delays, 5ns skew (ISL81487E)

• Half duplex pinouts

Slew rate limited drivers on the ISL8487E and ISL81487L

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.

• Operate from a single +5V supply (10% tolerance)

• Current limiting and thermal shutdown for driver overload

protection

Data rates up to 5Mbps are achievable by using the

ISL81487E, which features higher slew rates.

• Pin compatible replacements for: MAX487E, (ISL8487E);

LTC1487, ADM1487 (ISL81487L); MAX1487E, ST485ER

(ISL81487E)

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

which ensures a logic high Rx output if Rx inputs are floating.

• Pb-free plus anneal available (RoHS compliant)

The 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.

Applications

• High node count networks

• Automated utility meter reading systems

• Factory automation

The half duplex devices multiplex the Rx inputs and Tx

outputs to allow transceivers with Rx and Tx disable

functions in 8 lead packages.

• Security networks

• Building environmental control systems

• Industrial/process control networks

Related Literature

For a full list of related documents, visit our website:

• ISL8487E, ISL81487L, and ISL81487E product pages

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?

(A) SHUTDOWN? COUNT

120

ISL8487E

ISL81487L

ISL81487E

Half

256

Yes

120

350

FN6051 Rev.8.00

Sep 20, 2018

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与ISL81487L相关器件

型号	品牌	获取价格	描述	数据表
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
ISL81487LIBZ-T	INTERSIL	获取价格	【15kV ESD Protected, 1/8 Unit Load, 5V, Low P
ISL81487LIP	INTERSIL	获取价格	【15kV ESD Protected, 1/8 Unit Load, 5V, Low P
ISL81487LIP-T	RENESAS	获取价格	Line Transceiver, 1 Func, 1 Driver, 1 Rcvr, BICMOS, PDIP8
ISL81487LIPZ	INTERSIL	获取价格	【15kV ESD Protected, 1/8 Unit Load, 5V, Low P
ISL81601	RENESAS	获取价格	60V Bidirectional 4-Switch Synchronous Buck-Boost Controller

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