DS8921M - Differential Line Driver and Receiver Pair

DS8921/DS8921A/DS8921AT - Differential Line Driver and Receiver Pair


General Description
The DS8921, DS8921A are Differential Line Driver and Receiver pairs designed specifically for applications meeting the ST506, ST412 and ESDI Disk Drive Standards. In addition, these devices meet the requirements of the EIA Standard RS-422.



The DS8921, DS8921A receivers offer an input sensitivity of
200 mV over a ±7V common mode operating range. Hysteresis
is incorporated (typically 70 mV) to improve noise margin
for slowly changing input waveforms.



The DS8921, DS8921A drivers are 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 0.5 ns (typ.) with propagation   delays of 12 ns.


The DS8921, DS8921A are designed to be compatible with TTL and CMOS.



Features

• 12 ns typical propagation delay
• Output skew - 0.5 ns typical
• Meet the requirements of EIA Standard RS-422
• Complementary Driver Outputs
• High differential or common-mode input voltage ranges of ±7V
• ±0.2V receiver sensitivity over the input voltage range
• Receiver input hysteresis-70 mV typical
• DS8921AT industrial temperature operation: (−40°C to +85°C)

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