ADM489A 5 V, Slew-Rate Limited, Low Power, 250 kbps, Full Duplex EIA RS-485 Transceiver (with DE/RE)

The ADM488A and ADM489A are low power, differential line transceivers suitable for communication on multipoint bus transmission lines. They are intended for balanced data transmission and comply with both RS-485 and RS-422 standards of the Electronics Industries Association (EIA). Both products contain a single differential line driver and a single differential line receiver, making them suitable for full-duplex data transfer. The ADM489A contains an additional receiver and driver enable control. Applications

The input impedance is 12 kΩ, allowing 32 transceivers to be connected on the bus. The ADM488A/ADM489A operate from a single 5 V ± 10% power supply.

Excessive power dissipation that is caused by bus contention or 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 ADM488A/ADM489A are fabricated on BiCMOS, an advanced mixed technology process combining low power CMOS with fast switching bipolar technology.

The ADM488A/ADM489A are fully specified over the industrial temperature range and are available in SOIC and MSOP packages.

Features and Benefits

Complies with ANSI TIA/EIA-485-A-1998 and ISO 8482: 1987(E)

250 kbps data rate

Single 5 V ± 10% supply

−7 V to +12 V bus common-mode range

Connect up to 32 nodes on the bus

Reduced slew rate for low EM interference

Short-circuit protection

30 μA supply current

Interface & Isolation

Interface RS-485 and RS-422

Data Sheets

Document	note
ADM488A/ADM489A: Full-Duplex, Low Power,Slew Rate Limited, EIA RS-485 Transceivers Data Sheet (Rev. B)	PDF 281 kB

Application Notes

Document	note
AN-1176: Component Footprints and Symbols in the Binary .Bxl File Format (Rev. 0)	PDF 671 kB

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
ADM489ABRMZ Production	10 ld MSOP	OTH 50	-40 to 85C	1.29	1.1	Y
ADM489ABRMZ-REEL7 Production	10 ld MSOP	REEL 1000	-40 to 85C	0	1.1	Y
ADM489ABRZ Production	14 ld SOIC	OTH 56	-40 to 85C	1.24	1.05	Y
ADM489ABRZ-REEL7 Production	14 ld SOIC	REEL 1000	-40 to 85C	0	1.05	Y