1. General description
The 74ABT574A high-performance BiCMOS device combines low static and dynamic
power dissipation with high speed and high output drive.
The 74ABT574A is an 8-bit, edge triggered register coupled to eight 3-State output
buffers. The clock input (CP) and output enable input (OE
) control gates, control the two
sections of the device independently. The state of each data input (Dn, one set-up time
before the Low-to-High clock transition) is transferred to the Q output of the corresponding
flip-flop.
When OE
is Low, the stored data appears at the outputs. When OE is High, the outputs
are in the High-impedance “off” state, which means they do not drive or load the bus.
The 3-State output buffers are designed to drive heavily loaded 3-State buses, MOS
memories, or MOS microprocessors. The active-Low Output Enable (OE
) controls all
eight 3-State buffers independent of the clock operation.
2. Features and benefits
74ABT574A is flow-through pinout version of 74ABT374A
Inputs and outputs on opposite side of package allow easy
interface to microprocessors
3-State outputs for bus interfacing
Power-on 3-state
Power-on reset
Common output enable
Latch-up protection exceeds 500 mA per JESD78B class II level A
ESD protection:
HBM JESD22-A114F exceeds 2000 V
MM JESD22-A115-A exceeds 200 V
Live insertion/extraction permitted.
74ABT574A
Octal D-type flip-flop; 3-state
Rev. 2 — 23 November 2012 Product data sheet
