SN74ALS374A Octal D-Type Edge Triggered Flip-Flops with 3-State Outputs | TI.com

SN74ALS374A
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Octal D-Type Edge Triggered Flip-Flops with 3-State Outputs

 

Description

These octal D-type edge-triggered flip-flops feature 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. They are particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers.

On the positive transition of the clock (CLK) input, the Q outputs are set to the logic levels set up at the data (D) inputs.

A buffered output-enable (OE\) input places the eight outputs in either a normal logic state (high or low logic levels) or the high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance state and the increased drive provide the capability to drive bus lines without interface or pullup components.

OE\ does not affect internal operations of the flip-flops. Old data can be retained or new data can be entered while the outputs are in the high-impedance state.

The SN54ALS374A and SN54AS374 are characterized for operation over the full military temperature range of -55°C to 125°C. The SN74ALS374A and SN74AS374 are characterized for operation from 0°C to 70°C.


Features

  • D-Type Flip-Flops in a Single Package With 3-State Bus Driving True Outputs
  • Full Parallel Access for Loading
  • Buffered Control Inputs
  • Package Options Include Plastic Small-Outline (DW) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) DIPs

Parametrics

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Part number Order Technology Family Input type Output type VCC (Min) (V) VCC (Max) (V) IOL (Max) (mA) IOH (Max) (mA) Rating Package Group
SN74ALS374A Order now ALS     TTL     TTL     4.5     5.5     24     -2.6     Catalog     PDIP | 20
SOIC | 20
SO | 20    
SN54ALS374A Samples not available ALS     TTL     TTL     4.5     5.5     24     -2.6     Military     CDIP | 20
CFP | 20
LCCC | 20