DS8922AMX ,TRI-STATE RS-422 Dual Differential Line Drivers and Receiver PairGeneral Descriptionthe outputs and prevent erroneous glitches on the transmis-The DS8922/22A and DS ..
DS8922AN ,TRI-STATE RS-422 Dual Differential Line Drivers and Receiver PairGeneral Descriptionthe outputs and prevent erroneous glitches on the transmis-The DS8922/22A and DS ..
DS8922M ,TRI-STATE RS-422 Dual Differential Line Drivers and Receiver PairDS8922/DS8922A/DS8923A TRI-STATE RS-422 Dual Differential Line Driver and Receiver PairsJuly 2004®D ..
DS8922MX ,TRI-STATE RS-422 Dual Differential Line Drivers and Receiver PairGeneral Descriptionthe outputs and prevent erroneous glitches on the transmis-The DS8922/22A and DS ..
DS8922N ,TRI-STATE RS-422 Dual Differential Line Drivers and Receiver PairDS8922/DS8922A/DS8923A TRI-STATE RS-422 Dual Differential Line Driver and Receiver PairsJuly 2004®D ..
DS8923AM ,TRI-STATE RS-422 Dual Differential Line Drivers and Receiver PairGeneral Descriptionthe outputs and prevent erroneous glitches on the transmis-The DS8922/22A and DS ..
DS8922AM-DS8922AMX-DS8922AN-DS8922M-DS8922MX-DS8922N-DS8923AM-DS8923AN
TRI-STATE RS-422 Dual Differential Line Drivers and Receiver Pair
DS8922/DS8922A/DS8923A TRI-STATE®
RS-422 Dual Differential Line Driver and Receiver Pairs
General DescriptionThe DS8922/22A and DS8923A are Dual Differential Line
Driver and Receiver pairs. These devices are designed spe-
cifically for applications meeting the ST506, ST412 and
ESDI Disk Drive Standards.In addition,the devices meetthe
requirementsofthe EIA Standard RS-422.
These devices offeran input sensitivityof 200 mV overa
±7V common mode operating range. Hysteresisis incorpo-
rated (typically70 mV)to improve noise marginfor slowly
changing input waveforms.An input fail-safe circuitis pro-
vided such thatif the receiver inputs are open the output
assumes the logical one state.
The DS8922A and DS8923A drivers are designedto provide
unipolar differential driveto twisted pairor parallel wire trans-
mission lines. Complementary outputs are logically ANDed
and providean output skewof0.5ns (typ.) with propagation
delaysof12ns.
Both devices feature TRI-STATE outputs. The DS8922/22A
have independent control functions commontoa driver and
receiver pair. The DS8923A has separate driver and receiver
control functions.
Power up/down circuitryis featured which will TRI-STATE
the outputs and prevent erroneous glitchesonthe transmis-
sion lines during system powerupor power down operation.
The DS8922/22A and DS8923Aare designedtobe compat-
ible with TTL and CMOS.
Features12ns typical propagation delay Output skew—±0.5ns typical Meetsthe requirementsof EIA Standard RS-422 Complementary Driver Outputs High differentialor common-mode input voltage ranges ±7V ±0.2V receiver sensitivity over the input voltage range Receiver input fail-safe circuitry Receiver input hysteresis—70 mV typical Glitch free power up/down TRI-STATE outputs
Connection Diagrams
DS8922A Dual-In-LineOrder Number DS8922M, DS8922N,
DS8922AMor DS8922AN
See NS Package Number M16Aor N16E
July 2004
DS8922/DS8922A/DS8923A
TRI-ST
RS-422
Dual
Differential
Line
Driver
and
Receiver
Pairs
