SDYU001AC June   2015  – November 2025 LSF0101 , LSF0102 , LSF0108 , SN74GTL2014 , SN74HC245 , SN74LS07 , SN74LV123A , SN74LV1T08 , SN74LV1T34 , SN74LV244AT , SN74LV245A , SN74LV4T125 , SN74LVC14A , SN74LVC1G08 , SN74LVC1G125 , SN74LVC245A , SN74LVTH125 , SN74LVTH16244A , SN74LVTH16245A , SN74LVTH245A

 

  1.   1
  2.   Trademarks
  3. 1Introduction
  4. 2Logic Overview
    1. 2.1 Logic Family Quick Reference
    2. 2.2 Comparison of Switching Standards
    3. 2.3 Automotive Logic
    4. 2.4 Ongoing Packaging Investment
    5. 2.5 TI's Programmable Logic Devices: TPLD
    6. 2.6 Function Table
  5. 3Logic Families
    1. 3.1  Legacy Logic
    2. 3.2  AC(T): Advanced CMOS
    3. 3.3  AHC(T): Advanced High-Speed CMOS
    4. 3.4  ALVC: Advanced Low-Voltage CMOS
    5. 3.5  AUC: Advanced Ultra Low Voltage CMOS
    6. 3.6  AUP: Advanced Ultra-Low Power
    7. 3.7  AVC: Advanced Very-Low-Voltage CMOS
    8. 3.8  HC(T): High-Speed CMOS
    9. 3.9  HCS: High-Speed CMOS with Schmitt-trigger inputs
    10. 3.10 LV-A(T): Low Voltage
    11. 3.11 LVxT: Low-Voltage CMOS Single Supply Translating Logic
    12. 3.12 LVC: Low-Voltage CMOS
    13. 3.13 LVT: Low-Voltage BiCMOS Technology
  6. 4Appendix A: Logic Packages
  7. 5Appendix B: Competitor Family Cross Reference
  8. 6Appendix C: Logic Part Number Naming Conventions
  9. 7Appendix D: Standard Logic Functions
  10. 8Revision History

3.1 Legacy Logic

Legacy Family Comparison

Texas Instruments continues to support a variety of legacy logic families to support those customers and products that have not yet updated to the latest and greatest technologies. This table provides a brief summary for comparison of our legacy logic family offerings.

Table 3-1
Family Name Example GPN Recommended Replacement Family Typical Supply Voltage (V) Typical Static Supply Current (mA) Switching Standard

Defining Features

 Intro Year
Transistor-Transistor Logic (TTL) SN7400

AHCT

ACT

HCT

 5 12 TTL

First commercial integrated transistor-transistor logic

 1966
Complimentary Metal-Oxide Semiconductor (CMOS) logic CD4011B

AHC

AC

HC

 3 to 18 0.001 CMOS

First CMOS logic family, originally introduced by RCA

 1968
Schottky TTL SN74S00

AHCT

ACT

HCT

 5 20 TTL

Schottky diodes used to improve switching speeds

 1969
Low-power Schottky TTL SN74LS00

AHCT

ACT

HCT

 5 2.4 TTL

Lower power version of the S family

 1971
Fast Schottky TTL SN74F00

AHCT

ACT

 5 6.8 TTL

Originally from Fairchild, included "miller-killer" circuit to improve low-to-high transition times

 1978
Advanced low-power Schottky TTL SN74ALS08

AHCT

ACT

HCT

 5 1.5 TTL

Same technology as the AS family, but with reduced speed to improve power consumption

 1980
Advanced Schottky TTL SN74AS00

AHCT

ACT

 5 10.8 TTL

Improved version of the F logic family, producing the best speed to power ratio (Propagation Delay Product, PDP) available in any bipolar logic family

 1982
Bipolar-CMOS (BiCMOS) logic SN74BCT245

LVT

ACT

 5 57 TTL

High drive (+64/-15mA) bus buffers and transceivers, 5ns typical delay

 1986
Fast CMOS CY74FCT245T

LVT

ACT

 5 0.0001 TTL

High drive (+64/-32mA) bus buffers and transceivers, 3ns typical delay

 1988
Advanced BiCMOS SN74ABT245B

LVT

ACT

 5 30 TTL

High drive (+64/-32mA) bus buffers and transceivers, 2ns typical delay

 1991