DS89C21 Datasheet | National Semiconductor

Description The DS89C21 is a differential CMOS line driver and receiver pair, designed to meet the requirements of TIA/EIA-422-A (RS-422) electrical characteristics interface standard. The DS89C21 provides one driver and one receiver in a minimum footprint. The device is offered in an 8-pin SOIC package. The CMOS design minimizes the supply current to 6 m A, making the device ideal for use in battery powered or power conscious applications. The driver features a fast transition time specified at 2.2 ns, and a maximum differential skew of 2 ns making the driver ideal for use in high speed applications operating above 10 MHz. The receiver can detect signals as low as 200 m V, and also incorporates hysteresis for noise rejection. Skew is specified at 4 ns maximum. The DS89C21 is patible with TTL and CMOS levels (DI and RO). Features n Meets TIA/EIA-422-A (RS-422) and CCITT V.11 remendation n LOW POWER design - 15 m W typical n Guaranteed AC parameters: - Maximum driver skew 2.0 ns - Maximum receiver skew 4.0 ns n Extended temperature range: - 40˚C to +85˚C n Available in SOIC packaging n Operates over 20 Mbps n Receiver OPEN input failsafe feature Connection Diagram Truth Tables Driver Input DI H L DS011753-1 Outputs DO H L DO- L H Order Number DS89C21TM See NS Package Number M08A Receiver Inputs RI- RI- VDIFF ≥ +200 m V VDIFF ≤ - 200 m V OPEN† †Non-terminated Output RO H L H © 1998 National Semiconductor Corporation DS011753 .national. Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (VCC) Driver Input Voltage (DI) Driver Output Voltage (DO, - DO ) Receiver Input Voltage - V 7V - 1.5V to VCC + 1.5V - 0.5V to +7V (TSTG) - 65˚C to +150˚C +260˚C Lead Temperature (TL) (Soldering 4 sec.) Maximum Junction Temperature 150˚C Maximum Package Power Dissipation @+25˚C M Package 714 m W Derate M Package 5.7 m W/˚C...