54AC11534, 74AC11534
OCTAL D-TYPE EDGE-TRIGGERED FLIP-FLOPS
WITH 3-STATE OUTPUTS

SCAS037A - JULY 1987 - REVISED APRIL 1993

Copyright © 1992, Texas Instruments Incorporated

features

• Eight D-Type Flip-Flops in a Single Package
• 3-State Bus Driving Inverting Outputs
• Full Parallel Access for Loading
• Inputs Are TTL-Voltage Compatible
• Flow-Through Architecture to Optimize PCB Layout
• Center-Pin V_CC and GND Configurations to Minimize High-Speed Switching Noise
• EPIC^TM (Enhanced-Performance Implanted CMOS) 1-m Process
• 500-mA Typical Latch-Up Immunity
  at 125°C
• Package Options Include Plastic Small- Outline Packages, Ceramic Chip Carriers, and Standard Plastic and Ceramic 300-mil DIPs

EPIC is a trademark of Texas Instruments Incorporated.

description

These eight flip-flops feature 3-state outputs designed for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers.

The eight flip-flops of the ´AC11534 are edge- triggered, D-type flip-flops. On the positive transition of the clock, the Q\ outputs are set to the complement of the logic levels at the D inputs. The ´AC11534 is functionally equivalent to the ´AC11374 except for having inverted outputs.

An output-control input is used to place the eight outputs in either a normal logic state (high or low logic levels) or a high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance third state and increased drive provide the capability to drive the bus lines in a bus-organized system without need for interface or pull-up components. The output control does not affect the internal operation 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 54AC11534 is characterized for operation over the full military temperature range of -55°C to 125°C. The 74AC11534 is characterized for operation from - 40°C to 85°C.