Functional Description

• Octal D-Type Latch with 3-State Outputs

General

The 74VHCT573A is an advanced high speed CMOS OCTAL LATCH with 3-STATE OUTPUT fabricated with

silicon gateC2MOS technology.

It achieves the high speed operation similar to equivalent Bipolar Schottky TTL while maintaining the CMOS

low power dissipation.

This 8-bit D-type latch is controlled by a latch enable input (LE) and an output enable input (OE).When the OE

input is high, the eight outputs are in a high impedance state.

The input voltage are compatible with TTL output voltage.

This device may be used as a level converter for interfacing 3.3V to 5 V system.

Input protection and output circuit ensure that 0 to 5.5 V can be applied to the input and output (Note) pins

without regard to the supply voltage. These structure prevents device destruction due to mismatched supply and

input/output voltages such as battery back up, hot board insertion, etc.

Note: Output in off-state

Features

(1) AEC-Q100 (Rev. H) (Note 1)

(2) Wide operating temperature range: Topr = -40 to 125 

(3) High speed: Propagation delay time = 7.7 ns (typ.) at VCC = 5.0 V

(4) Low power dissipation: ICC = 4.0 μA (max) at Ta = 25

(5) Compatible with TTL inputs: VIL = 0.8 V (max)

VIH = 2.0 V (min)

(6) Power down protection is provided on all inputs and outputs.

(7) Balanced propagation delays: tPLH ≈ tPHL

(8) Low noise: VOLP = 1.5 V (max)

(9) Pin and function compatible with the 74 series (74ACT/HCT/AHCT etc.) 573 type.