CD74HC573

ACTIVE

High Speed CMOS Logic Octal Transparent Latches with 3-State Outputs

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Product details

Parameters

Channels (#) 8 Technology Family HC VCC (Min) (V) 2 VCC (Max) (V) 6 Input type Standard CMOS Output type 3-State Clock Frequency (Max) (MHz) 28 IOL (Max) (mA) 7.8 IOH (Max) (mA) -7.8 ICC (Max) (uA) 80 Features Balanced outputs, High speed (tpd 10-50ns), Positive input clamp diode, Flow-through pinout open-in-new Find other D-type latch

Package | Pins | Size

PDIP (N) 20 229 mm² 24.33 x 9.4 SOIC (DW) 20 132 mm² 12.8 x 10.3 open-in-new Find other D-type latch

Features

  • 2-V to 6-V VCC Operation
  • Wide Operating Temperature Range of –55°C to 125°C
  • 3-State Outputs Directly Drive Bus Lines
  • Balanced Propagation Delays and Transition Times
  • Bus Driver Outputs Drive Up To 15 LS-TTL Loads
  • Significant Power Reduction Compared to LS-TTL Logic ICs
open-in-new Find other D-type latch

Description

The 'HC573 devices are octal transparent D-type latches designed for 2-V to 6-V VCC operation.

When the latch-enable (LE) input is high, the Q outputs follow the data (D) inputs. When LE is low, the Q outputs are latched at the logic levels of the D inputs.

A buffered output-enable (OE\) input can be used to place the eight outputs in either a normal logic state (high or low) 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 increased drive provide the capability to drive bus lines without interface or pullup components.

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

To ensure the high-impedance state during power up or power down, OE\ should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

open-in-new Find other D-type latch
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Technical documentation

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Type Title Date
* Datasheet CD54HC573, CD74HC573 datasheet (Rev. A) Apr. 24, 2003
Selection guide Logic Guide (Rev. AB) Jun. 12, 2017
Application note Implications of Slow or Floating CMOS Inputs (Rev. D) Jun. 23, 2016
Application note Understanding and Interpreting Standard-Logic Data Sheets (Rev. C) Dec. 02, 2015
Application note Power-Up Behavior of Clocked Devices (Rev. A) Feb. 06, 2015
User guide LOGIC Pocket Data Book (Rev. B) Jan. 16, 2007
Application note Semiconductor Packing Material Electrostatic Discharge (ESD) Protection Jul. 08, 2004
User guide Signal Switch Data Book (Rev. A) Nov. 14, 2003
More literature Logic Cross-Reference (Rev. A) Oct. 07, 2003
Application note TI IBIS File Creation, Validation, and Distribution Processes Aug. 29, 2002
Application note CMOS Power Consumption and CPD Calculation (Rev. B) Jun. 01, 1997
Application note Designing With Logic (Rev. C) Jun. 01, 1997
Application note Input and Output Characteristics of Digital Integrated Circuits Oct. 01, 1996
Application note Live Insertion Oct. 01, 1996
Application note SN54/74HCT CMOS Logic Family Applications and Restrictions May 01, 1996
Application note Using High Speed CMOS and Advanced CMOS in Systems With Multiple Vcc Apr. 01, 1996

Design & development

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Hardware development

EVALUATION BOARD Download
document-generic User guide
10
Description
This EVM is designed to support any logic device that has a D, DW, DB, NS, PW, P, N, or DGV package in a 14 to 24 pin count.
Features
  • Board design allows for versatility in evaluation
  • Supports a wide-range of logic devices

CAD/CAE symbols

Package Pins Download
PDIP (N) 20 View options
SOIC (DW) 20 View options

Ordering & quality

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