ADM488 5 V, Slew-Rate Limited, Low Power, 250 kbps, Full Duplex EIA RS-485 Transceiver

The ADM488 and ADM489 are low power differential line transceiver suitable for communication on multipoint bus transmission lines.

They are intended for balanced data transmission and comply with both EIA Standards RS-485 and RS-422. Both products contains a single differential line driver and a single differential line receiver making them suitable for full duplex data transfer.

The ADM489 contains an additional receiver and driver enable control.

The input impedance is 12 kohms, allowing 32 transceivers to be connected on the bus.

The ADM488/ADM489 operates from a single +5 V ± 10% power supply. Excessive power dissipation caused by bus contention or by output shorting is prevented by a thermal shutdown circuit. This feature forces the driver output into a high impedance state if during fault conditions a significant temperature increase is detected in the internal driver circuitry.

The receiver contains a fail-safe feature that results in a logic high output state if the inputs are unconnected (floating). The ADM488/ADM489 is fabricated on BiCMOS, an advanced mixed technology process combining low power CMOS with fast switching bipolar technology.

The ADM488/ADM489 is fully specified over the industrial temperature range and is available in DIP, SOIC and TSSOP packages.

Features and Benefits

Meets EIA RS-485 Standard
250 kbps Data Rate
Single 5 V ± 10% Supply
–7 V to +12 V Bus Common-Mode Range
12 kO Input Impedance
2 kV EFT Protection Meets IEC1000-4-4

High EM Immunity Meets IEC1000-4-3
Reduced Slew Rate for Low EM Interference
Short Circuit Protection
Excellent Noise Immunity
30 µA Supply Current

Interface & Isolation

Interface RS-485 and RS-422

Data Sheets

Document	note
ADM488/ADM489: Full-Duplex, Low Power, Slew Rate Limited, EIA RS-485 Transceivers Data Sheet (Rev. D)	PDF 379 kB

Application Notes

Document	note
AN-1176: Component Footprints and Symbols in the Binary .Bxl File Format (Rev. 0)	PDF 671 kB
AN-960: RS-485/RS-422 Circuit Implementation Guide (Rev. 0)	PDF 245 kB

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
ADM488AN Obsolete	8 ld PDIP	OTH 50		0	0	N
ADM488ANZ Production	8 ld PDIP	OTH 50	-40 to 85C	1.4	1.22	Y
ADM488AR Obsolete	8 ld SOIC	OTH 98		0	0	N
ADM488AR-REEL7 Obsolete	8 ld SOIC	REEL 1000		0	0	N
ADM488ARZ Production	8 ld SOIC	OTH 98	-40 to 85C	1.77	1.54	Y
ADM488ARZ-REEL Production	8 ld SOIC	REEL 2500	-40 to 85C	0	1.54	Y
ADM488ARZ-REEL7 Production	8 ld SOIC	REEL 1000	-40 to 85C	0	1.54	Y