74HC573D

Product Summary

The 74HC573D is a high-speed Si-gate CMOS device and is pin compatible with low power Schottky TTL (LSTTL). It is specified in compliance with JEDEC standard no. 7A. The 74HC573D is a octal D-type transparent latch featuring separate D-type inputs for each latch and 3-state outputs for bus oriented applications. A latch enable (LE) input and an output enable (OE) input are common to all latches. The 74HC573D consists of eight D-type transparent latches with 3-state true outputs. When LE is HIGH, data at the Dn inputs enter the latches. In this condition the latches are transparent, i.e. a latch output will change state each time its corresponding D-input changes. When LE is LOW the latches store the information that was present at the D-inputs a set-up time preceding the HIGH-to-LOW transition of LE. When OE is LOW, the contents of the 8 latches are available at the outputs. When OE is HIGH, the outputs go to the high impedance OFF-state. Operation of the OE input does not affect the state of the latches. The 74HC573D is functionally identical to the 563 and 373, but the 563 has inverted outputs and the 373 has a different pin arrangement.

Parametrics

74HC573D absolute maximum ratings: (1)tPHL/ tPLH propagation delay Dn to Qn: 47 to 225ns; 2.0V; 17 to 45ns; 14 to 38ns; 6.0V; (2)tPHL/ tPLH propagation delay LE to Qn: 50 to 225ns; 2.0V; 18 to 45ns; 4.5V; 14 to 38ns; 6.0V; (3)tPZH/ tPZL 3-state output enable time OE to Qn: 44 to 210ns; 2.0V; 16 to 42ns, 4.5V; 13 to 36ns, 6.0V; (4)tPHZ/ tPLZ 3-state output disable time OE to Qn: 55 to 225ns; 2.0V; 5 to 18ns, 4.5V; 4 to 15ns, 6.0V; (5)tTHL/ tTLH output transition time: 14 to 90ns, 2.0V; 5 to 18ns; 4.5V; 4 to 15V, 6.0V.

Features

74HC573D features: (1)Inputs and outputs on opposite sides of package allowing easy interface with microprocessors; (2)Useful as input or output port for microprocessors/microcomputers; (3)3-state non-inverting outputs for bus oriented applications; (4)Common 3-state output enable input; (5)Functionally identical to the 563 and 373; (6)Output capability: bus driver; (7)ICC category: MSI.

Diagrams