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SN74AHCT125-Q1

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Automotive 4-ch, 4.5-V to 5.5-V buffers with TTL-compatible CMOS inputs and 3-state outputs

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Data sheet

SN74AHCT125-Q1

ACTIVE
Data sheet Order now

Product details

Technology family AHCT Supply voltage (min) (V) 4.5 Supply voltage (max) (V) 5.5 Number of channels 4 IOL (max) (mA) 8 Supply current (max) (µA) 20 IOH (max) (mA) -8 Input type TTL-Compatible CMOS Output type 3-State Features Balanced outputs, Over-voltage tolerant inputs, Very high speed (tpd 5-10ns) Rating Automotive Operating temperature range (°C) -40 to 125
Technology family AHCT Supply voltage (min) (V) 4.5 Supply voltage (max) (V) 5.5 Number of channels 4 IOL (max) (mA) 8 Supply current (max) (µA) 20 IOH (max) (mA) -8 Input type TTL-Compatible CMOS Output type 3-State Features Balanced outputs, Over-voltage tolerant inputs, Very high speed (tpd 5-10ns) Rating Automotive Operating temperature range (°C) -40 to 125
SOIC (D) 14 51.9 mm² 8.65 x 6 TSSOP (PW) 14 32 mm² 5 x 6.4 WQFN (BQA) 14 7.5 mm² 3 x 2.5
  • Inputs are TTL-voltage compatible
  • Latch-up performance exceeds 250mA per JESD 17
  • Functional Safety Capable
    • Documentation available to aid safety system design
  • Inputs are TTL-voltage compatible
  • Latch-up performance exceeds 250mA per JESD 17
  • Functional Safety Capable
    • Documentation available to aid safety system design

The SN74AHCT125-Q1 devices are quadruple bus buffer gates featuring independent line drivers with 3-state outputs. Each output is disabled when the associated output-enable (OE) input is high. When OE is low, the respective gate passes the data from the A input to its Y output.

To establish the high-impedance state during power up or power down, tiedown the OE to VCC through a pullup resistor; the current-sinking capability of the driver determines the minimum value of the resistor.

The SN74AHCT125-Q1 devices are quadruple bus buffer gates featuring independent line drivers with 3-state outputs. Each output is disabled when the associated output-enable (OE) input is high. When OE is low, the respective gate passes the data from the A input to its Y output.

To establish the high-impedance state during power up or power down, tiedown the OE to VCC through a pullup resistor; the current-sinking capability of the driver determines the minimum value of the resistor.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet SN74AHCT125-Q1 Automotive Quadruple Bus Buffer Gates With 3-State Outputs datasheet (Rev. D) PDF | HTML 10 Sep 2025
Selection guide Logic Guide (Rev. AC) PDF | HTML 13 Nov 2025
Application note Implications of Slow or Floating CMOS Inputs (Rev. E) 26 Jul 2021
Functional safety information SN74AHCT125-Q1 Functional Safety FIT Rate and Failure Mode Distribution 29 Dec 2019
Selection guide Little Logic Guide 2018 (Rev. G) 06 Jul 2018
Application note How to Select Little Logic (Rev. A) 26 Jul 2016
Application note Understanding and Interpreting Standard-Logic Data Sheets (Rev. C) 02 Dec 2015
More literature Automotive Logic Devices Brochure 27 Aug 2014
User guide LOGIC Pocket Data Book (Rev. B) 16 Jan 2007
Product overview Design Summary for WCSP Little Logic (Rev. B) 04 Nov 2004
Application note Semiconductor Packing Material Electrostatic Discharge (ESD) Protection 08 Jul 2004
Application note Selecting the Right Level Translation Solution (Rev. A) 22 Jun 2004
Application note Advanced High-Speed CMOS (AHC) Logic Family (Rev. C) 02 Dec 2002
Application note Texas Instruments Little Logic Application Report 01 Nov 2002
Application note TI IBIS File Creation, Validation, and Distribution Processes 29 Aug 2002
Design guide AHC/AHCT Designer's Guide February 2000 (Rev. D) 24 Feb 2000
Product overview Military Advanced High-Speed CMOS Logic (AHC/AHCT) (Rev. C) 01 Apr 1998
Application note Migration From 3.3-V To 2.5-V Power Supplies For Logic Devices 01 Dec 1997
Application note Bus-Interface Devices With Output-Damping Resistors Or Reduced-Drive Outputs (Rev. A) 01 Aug 1997
Application note CMOS Power Consumption and CPD Calculation (Rev. B) 01 Jun 1997
Application note Live Insertion 01 Oct 1996

Design & development

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

Evaluation board

14-24-LOGIC-EVM — Logic product generic evaluation module for 14-pin to 24-pin D, DB, DGV, DW, DYY, NS and PW packages

The 14-24-LOGIC-EVM evaluation module (EVM) is designed to support any logic device that is in a 14-pin to 24-pin D, DW, DB, NS, PW, DYY or DGV package,

User guide: PDF | HTML
Not available on TI.com
Simulation model

SN74AHCT125 Behavioral SPICE Model

SCLM256.ZIP (7 KB) - PSpice Model
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Package Pins CAD symbols, footprints & 3D models
SOIC (D) 14 Ultra Librarian
TSSOP (PW) 14 Ultra Librarian
WQFN (BQA) 14 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

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