SCHS147J November   1998  – November 2021 CD54HC138 , CD54HC238 , CD54HCT138 , CD54HCT238 , CD74HC138 , CD74HC238 , CD74HCT138 , CD74HCT238

PRODUCTION DATA  

  1. Features
  2. Description
  3. Revision History
  4. Pin Configuration and Functions
    1.    
  5. Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 Recommended Operating Conditions
    3. 5.3 Thermal Information
    4. 5.4 Electrical Characteristics
    5. 5.5 Switching Characteristics (2)
  6. Parameter Measurement Information
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Device Functional Modes
  8. Power Supply Recommendations
  9. Layout
    1. 9.1 Layout Guidelines
  10. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  11. 11Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • PW|16
  • NS|16
  • N|16
  • D|16
Thermal pad, mechanical data (Package|Pins)
Orderable Information

Features

  • Select one of eight data outputs:
    • Active low for '138
    • Active high for '238
  • l/O port or memory selector
  • Three enable inputs to simplify cascading
  • Typical propagation delay of 13 ns at VCC = 5 V, CL = 15 pF, TA = 25°C
  • Fanout (over temperature range)
    • Bus driver outputs: 15 LSTTL loads
    • Standard outputs: 10 LSTTL loads
  • Wide operating temp range: -55°C to 125°C
  • Balanced propagation delay and transition times
  • Significant power reduction compared to LSTTL logic ICs
  • HC types
    • 2 V to 6 V operation
    • High noise immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5 V
  • HCT types
    • 4.5-V to 5.5-V operation
    • Direct LSTTL input logic compatibility, VIL= 0.8 V (Max), VIH = 2 V (Min)
    • CMOS input compatibility, Il ≤ 1µA at VOL, VOH
GUID-20210218-CA0I-M11P-LCKQ-TNXKGB9NZGJB-low.gif Functional Block Diagram '138