ISL81487 Intersil Corporation, ISL81487 Datasheet

ISL81487

Manufacturer Part Number

ISL81487

Description

1/8 Unit Load, 5v, Low Power, High Speed or Slew Rate Limited, Rs-485/rs-422 Transceivers

Manufacturer

Intersil Corporation

Datasheet

1.ISL81487.pdf (13 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

ISL81487EIBZ

Manufacturer:

INTERSIL

Quantity:

20 000

Company:

Amily Shenzhen XNWY Technology Co., Ltd

Part Number:

ISL81487EIBZ

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

ISL81487EIBZ-T

Manufacturer:

INTERSIL

Quantity:

12 000

Company:

Meier Automation Equipment Co., Limited

Part Number:

ISL81487EIBZ-T

Manufacturer:

INTERSIL

Quantity:

20 000

Company:

Amily Shenzhen XNWY Technology Co., Ltd

Part Number:

ISL81487EIBZ-T

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

ISL81487EIP

Manufacturer:

Intersil

Quantity:

Company:

Meier Automation Equipment Co., Limited

Part Number:

ISL81487EIPE

Manufacturer:

INTERSIL

Quantity:

20 000

Company:

Meier Automation Equipment Co., Limited

Part Number:

ISL81487EIPZ

Manufacturer:

INTERSIL

Quantity:

20 000

Company:

H&T Electronics

Part Number:

ISL81487IB

Quantity:

406

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

ISL81487IBZ-T

Manufacturer:

INTERSIL

Quantity:

15 000

Company:

Meier Automation Equipment Co., Limited

Part Number:

ISL81487IBZ-T

Manufacturer:

INTERSIL

Quantity:

20 000

Company:

H&T Electronics

Part Number:

ISL81487IBZ-T

Quantity:

5 400

Company:

H&T Electronics

Part Number:

ISL81487LIBZ-T

Quantity:

5 000

Company:

H&T Electronics

Part Number:

ISL81487LIPZ

Quantity:

1 460

Current page: 1 of 13
Download datasheet (431Kb)

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

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

Transceivers

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).

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.

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.

Data rates up to 5Mbps are achievable by using the

ISL81487, 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.

These half duplex devices multiplex the Rx inputs and Tx

outputs to allow transceivers with Rx and Tx disable

functions in 8 lead packages.

NUMBER

ISL81483

ISL81487

ISL8487

PART

HALF/FULL

DUPLEX

Half

ALLOWED ON BUS

NO. OF DEVICES

128

256

Data Sheet

DATA RATE

TABLE 1. SUMMARY OF FEATURES

(Mbps)

0.25

1-888-INTERSIL or 321-724-7143

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

SLEW-RATE

LIMITED?

Yes

Features

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

• Specified for 10% Tolerance Supplies

• 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

• Low Current Shutdown Mode (Except ISL81487) . . . 1nA

• Low Quiescent Supply Current:

• -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)

• Current Limiting and Thermal Shutdown for driver

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

Applications

• High Node Count Networks

• Automated Utility Meter Reading Systems

• Factory Automation

• Security Networks

• Building Environmental Control Systems

• Industrial/Process Control Networks

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

- ISL8487, ISL81483. . . . . . . . . . . . . . . . . . 120

- ISL81487 . . . . . . . . . . . . . . . . . . . . . . . . . 300

Overload Protection

(ISL81483); MAX1487, LMS1487 (ISL81487)

DRIVER ENABLE?

ISL8487, ISL81483, ISL81487

December 2003

RECEIVER/

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

Yes

Intersil (and design) is a registered trademark of Intersil Americas Inc.

QUIESCENT

100

250

(µA)

SHUTDOWN?

LOW POWER

Yes

FN6050.2

A (Max.)

COUNT

Related parts for ISL81487

ISL81487 Summary of contents

Page 1

... Transmission (ISL8487, ISL81483 .up to 250kbps • Low Current Shutdown Mode (Except ISL81487 1nA • Low Quiescent Supply Current: - ISL8487, ISL81483 120 - ISL81487 . . . . . . . . . . . . . . . . . . . . . . . . . 300 • -7V to +12V Common Mode Input Voltage Range • Three State Rx and Tx Outputs • 30ns Propagation Delays, 5ns Skew (ISL81487) • ...

Page 2

... Pinout ISL8487, ISL81483, ISL81487 (PDIP, SOIC) TOP VIEW Ordering Information PART NO. TEMP. o (BRAND) RANGE ( C) PACKAGE ISL8487IB - SOIC (8487IB) ISL8487IP - PDIP ISL81483IB - SOIC (81483IB) ISL81483IP - PDIP ISL81487IB - SOIC ...

Page 3

... Typical Operating Circuits + B/Z A GND 5 3 ISL8487, ISL81483, ISL81487 ISL8487, ISL81483, ISL81487 + 0.1µ +5V + 0.1µ B A GND 5 ...

Page 4

... Receiver Output High Voltage V Receiver Output Low Voltage V Three-State (high impedance) I OZR Receiver Output Current 4 ISL8487, ISL81483, ISL81487 Thermal Information Thermal Resistance (Typical, Note SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . +0.5V PDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . Maximum Junction Temperature (Plastic Package 150 Maximum Storage Temperature Range . . . . . . . . . -65 +0.5V) Maximum Lead Temperature (Soldering 10s) ...

Page 5

... Time to Shutdown t SHDN 5 ISL8487, ISL81483, ISL81487 = 4.5V to 5.5V; Unless Otherwise Specified. Typicals are TEST CONDITIONS -7V ≤ V ≤ 12V ISL81483, ISL81487 IN CM ISL8487 ISL81487, DI ISL8487, ISL81483, DI (Note 7 0V -7V ≤ V ≤ ...

Page 6

... Devices meeting these limits are denoted as “1/4 unit load (1/4 UL)” transceivers. The RS-485 standard allows Unit Loads on the bus, so there can be 128 1/4 UL devices on a bus. Test Circuits and Waveforms 6 ISL8487, ISL81483, ISL81487 = 4.5V to 5.5V; Unless Otherwise Specified. Typicals are TEST CONDITIONS ...

Page 7

... ZH t Y/Z 0 (Note Y/Z 1 (Note 7) ZH(SHDN) t Y/Z 1 (Note 7) ZL(SHDN) FIGURE 3A. TEST CIRCUIT RE B +1. SIGNAL GENERATOR FIGURE 4A. TEST CIRCUIT 7 ISL8487, ISL81483, ISL81487 (Continued 100pF L OUT (Y) DIFF C = 100pF L OUT (Z) DIFF OUT ( SKEW = |t 500Ω GND (pF) ...

Page 8

... EMI, and to minimize reflections in unterminated or improperly terminated networks. Data rate on these slew rate limited versions is a maximum of 250kbps. ISL81487 drivers are not limited, so faster output transition times allow data rates of at least 5Mbps. Data Rate, Cables, and Terminations RS-485 and RS-422 are intended for network lengths up to 4000’ ...

Page 9

... Note that receiver and driver enable times increase when enabling from shutdown. Refer to Notes 5-9, at the end of the Electrical Specification table, for more information 5V ISL8487, ISL81483 and ISL81487; Unless Otherwise Specified CC A 3.6 3.4 3.2 2.8 2.6 2.4 2 ...

Page 10

... PHLY 16 -40 0 -25 25 TEMPERATURE ( FIGURE 12. DRIVER PROPAGATION DELAY vs TEMPERATURE (ISL81487) 10 ISL8487, ISL81483, ISL81487 5V ISL8487, ISL81483 and ISL81487; Unless Otherwise Specified (Continued 350 ISL81487E 300 ISL8487E, ISL81487L 250 200 150 HIGH 100 250 200 ...

Page 11

... FIGURE 16. DRIVER AND RECEIVER WAVEFORMS, LOW TO HIGH (ISL81487) Die Characteristics SUBSTRATE POTENTIAL (POWERED UP): GND TRANSISTOR COUNT: 518 PROCESS: Si Gate CMOS 11 ISL8487, ISL81483, ISL81487 5V ISL8487, ISL81483 and ISL81487; Unless Otherwise Specified (Continued 54Ω 100pF FIGURE 15. DRIVER AND RECEIVER WAVEFORMS, = 54Ω ...

Page 12

... Dambar protrusions shall not exceed 0.010 inch (0.25mm the maximum number of terminal positions. 10. Corner leads (1, N, N/2 and N for E8.3, E16.3, E18.3, E28.3, E42.6 will have a B1 dimension of 0.030 - 0.045 inch (0.76 - 1.14mm). 12 ISL8487, ISL81483, ISL81487 E8.3 8 LEAD DUAL-IN-LINE PLASTIC PACKAGE SYMBOL E A2 ...

Page 13

... 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 13 ISL8487, ISL81483, ISL81487 M8.15 (JEDEC MS-012-AA ISSUE C) 8 LEAD NARROW BODY SMALL OUTLINE PLASTIC ...

Related keywords

ISL81487 datasheet
ISL81487 data sheet
ISL81487 pdf datasheet
ISL81487 component
ISL81487 part
ISL81487 distributor
ISL81487 RoHS
ISL81487 datasheet download