UT54ACS164646S Schmitt CMOS 16-bit Bidirectional Multi-Purpose Registered Transceiver


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The UT54ACS164646S is a 16-bit, MultiPurpose, registered, level shifting, bus transceiver consisting of D-type flip-flops,
control circuitry, and 3-state outputs arranged for multiplexed transmission of data directly from the data bus or from the
internal storage registers. The high-speed, low power UT54ACS164646S transceiver is designed to perform multiple functions including: asynchronous two-way communication, signal buffering, voltage translation, cold- and warmsparing. The device can be used as two independant 8-bit transceivers or one 16-bit transceiver. Data on the A or B bus is clocked into the registers on the rising edge of the appropriate clock (xCLKAB or xCLKBA) input. With either VDD supply equal to zero volts, the UT54ACS164646S outputs and inputs present a minimum impedance of 750k making it ideal for “cold-spare” and "warm-spare" applications. By virtue of its flexible power supply interface, the UT54ACS164646S may operate as a 3.3-volt only, 5-volt only,
or mixed 3.3V/5V bus transceiver.


 Flexible voltage operation
- 5V bus to 3.3V bus
- 3.3V bus to 5V bus
- 5V bus to 5V bus
- 3.3V bus to 3.3V bus
 Independent registers for A and B buses
 Multiplexed real-time and stored data
 Flow-through architecture optimizes PCB layout
 Cold- and Warm-sparing
- 750k minimum input impedance power-off
- Guranteed output tri-state while one power supply is "off"
and the other is "on"
 Schmitt trigger inputs to filter noisy signals
 All inputs are 5V tolerant regardless of power supply voltage
 0.6um CRH CMOS Technology
 Operational Environment:
- Total dose: 100K rad(Si)
- Single Event Latchup immune>110 MeV-cm2/mg
- SEU Onset LET >75 MeV-cm2/mg
 High speed, low power consumption
 Available QML Q or V processes
 Standard Microcircuit Drawing: 5962-06234
 Package:
- 56-pin ceramic flatpack


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