SN54ALS74A, SN54AS74, SN74ALS74A, SN74AS74 are dual D-type positive-edge triggered flip-flops with clear and preset functions
The document details the specifications for four models of dual D-type positive-edge-triggered flip-flops: SN54ALS74A, SN54AS74, SN74ALS74A, and SN74AS74. These devices contain two independent flip-flops with clear and preset inputs, designed for military and commercial applications.
| Clock Frequency (AS74) | 134 MHz |
|---|---|
| Operating Temperature (Military) | -55°C to 125°C |
| Operating Temperature (Commercial) | 0°C to 70°C |
| Supply Voltage | 4.5 V to 5.5 V |
| High-Level Input Voltage | 2 V |
| Low-Level Input Voltage | 0.8 V |
| High-Level Output Current | -0.4 mA |
| Low-Level Output Current | 8 mA |
| Hold Time | 0 ns |
The SN54ALS74A and SN54AS74 are characterized for operation over the full military temperature range of -55°C to 125°C.
The SN74ALS74A and SN74AS74 are characterized for operation from 0°C to 70°C.
A low level at the Preset or Clear inputs sets or resets the outputs regardless of the levels of the other inputs.
Data at the D input meeting the setup time requirements are transferred to the outputs on the positive-going edge of the clock pulse.