The DS8923AM/NOPB is a dual differential Line Driver and Receiver designed specifically for applications meeting the ST506, ST412 and ESDI disk drive standards. In addition, the device meets the requirements of the EIA Standard RS-422. This device offers an input sensitivity of 200mV over a ±7V common-mode operating range. Hysteresis is incorporated (typically 70mV) to improve noise margin for slowly changing input waveforms. An input fail-safe circuit is provided such that if the receiver inputs are open the output assumes the logical one state. It is designed to provide unipolar differential drive to twisted pair or parallel wire transmission lines. Complementary outputs are logically ANDed and provide an output skew of 0.5ns (typical) with propagation delays of 12ns. It has separate driver and receiver control functions.
Complementary driver outputs
Receiver input failsafe circuitry
Glitch-free power up/down
Tri-state outputs
12ns Typical propagation delay
±0.5ns Typical output skew
±0.2V Receiver sensitivity over the input voltage range
