SN74HC21

ACTIVE

Dual 4-Input Positive-AND Gates

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Product details

Parameters

Technology Family HC VCC (Min) (V) 2 VCC (Max) (V) 6 Channels (#) 2 Inputs per channel 4 IOL (Max) (mA) 5.2 IOH (Max) (mA) -5.2 Input type Standard CMOS Output type Push-Pull Features High Speed (tpd 10-50ns) Data rate (Max) (Mbps) 28 Rating Catalog Operating temperature range (C) -40 to 85 open-in-new Find other AND gate

Package | Pins | Size

PDIP (N) 14 181 mm² 19.3 x 9.4 SOIC (D) 14 52 mm² 8.65 x 6 SOP (NS) 14 80 mm² 10.2 x 7.8 TSSOP (PW) 14 32 mm² 5 x 6.4 open-in-new Find other AND gate

Features

  • Wide Operating Voltage Range of 2 V to 6 V
  • Outputs Can Drive Up To 10 LSTTL Loads
  • Low Power Consumption, 20-µA Max ICC
  • Typical tpd = 11 ns
  • ±4-mA Output Drive at 5 V
  • Low Input Current of 1 µA Max

open-in-new Find other AND gate

Description

These devices contain two independent 4-input AND gates. They perform the Boolean function Y = A • B • C • D or Y = (A\ + B\ + C\ + D\)\ in positive logic.

open-in-new Find other AND gate
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Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet SN54HC21, SN74HC21 datasheet (Rev. E) Aug. 06, 2003
Technical articles How to keep your motor running safely Jun. 04, 2020
Selection guides Logic Guide (Rev. AB) Jun. 12, 2017
Application notes Implications of Slow or Floating CMOS Inputs (Rev. D) Jun. 23, 2016
Application notes Understanding and Interpreting Standard-Logic Data Sheets (Rev. C) Dec. 02, 2015
User guides LOGIC Pocket Data Book (Rev. B) Jan. 16, 2007
Application notes Semiconductor Packing Material Electrostatic Discharge (ESD) Protection Jul. 08, 2004
User guides Signal Switch Data Book (Rev. A) Nov. 14, 2003
More literature Logic Cross-Reference (Rev. A) Oct. 07, 2003
Application notes TI IBIS File Creation, Validation, and Distribution Processes Aug. 29, 2002
Application notes CMOS Power Consumption and CPD Calculation (Rev. B) Jun. 01, 1997
Application notes Designing With Logic (Rev. C) Jun. 01, 1997
Application notes Input and Output Characteristics of Digital Integrated Circuits Oct. 01, 1996
Application notes Live Insertion Oct. 01, 1996
Application notes SN54/74HCT CMOS Logic Family Applications and Restrictions May 01, 1996
Application notes Using High Speed CMOS and Advanced CMOS in Systems With Multiple Vcc Apr. 01, 1996

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS 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
EVALUATION BOARDS Download
document-generic User guide
1299
Description

The DLP® LightCrafter™ 4500 development module provides a flexible light steering solution with high brightness and resolution for industrial, medical and scientific applications. DLP LightCrafter 4500 features the 0.45 WXGA chipset and offers a compelling combination of resolution (...)

Features
  • RGB LED light engine with 150L light output
  • Onboard LED Driver with 0-5A LED Driver
  • Simultaneous RGB LED operation
  • High speed pattern display with native DLP4500 resolution (912x1140)
    • Up to 4225 Hz binary pattern rate
    • Up to 120 Hz 8-bit grayscale pattern rate
  • Image or video display up to WXGA resolution (...)

Reference designs

REFERENCE DESIGNS Download
High Resolution, Portable Light Steering Reference Design using DLP Technology
DLP4500-C350REF This reference design, featuring the DLP® 0.45” WXGA chipset and implemented in the DLP® LightCrafter™ 4500 evaluation module (EVM), enables flexible control of high resolution, accurate patterns for industrial, medical, and scientific applications. With a free USB-based GUI and (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Accurate Point Cloud Generation for 3D Machine Vision Applications using DLP® Technology
TIDA-00254 The 3D Machine Vision reference design employs Texas Instruments DLP® Advanced Light Control Software Development Kit (SDK) for LightCrafter™ series controllers, which allows developers to easily construct 3D point clouds by integrating TI’s digital micromirror device (DMD (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
PDIP (N) 14 View options
SO (NS) 14 View options
SOIC (D) 14 View options
TSSOP (PW) 14 View options

Ordering & quality

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