Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

Texas Instruments SN74ABT125DE4

Name: SN74ABT125DE4
Brand: Texas Instruments
SKU: SN74ABT125DE4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: SN74ABT125DE4

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: SN74ABT125DE4.pdf

Description:: IC BUFF NON-INVERT 5.5V 14SOIC

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:1,391

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

SN74ABT125DE4 from Texas Instruments is a quadruple bus buffer gate with independent 3-state outputs, designed for high-speed bidirectional data bus isolation in industrial and embedded systems. It delivers −32-mA high-level and 64-mA low-level output drive, supports hot insertion via I_off and power-up 3-state, and operates across −40°C to 85°C with 4.5–5.5-V supply.

For engineers reviewing the SN74ABT125DE4 datasheet, SN74ABT125DE4 pinout, SN74ABT125DE4 application, or SN74ABT125DE4 equivalent, this device is selected for robust bus buffering where ground bounce control (<1 V VOLP), latch-up immunity (>500 mA), and ESD protection (2000-V HBM) are critical in mixed-voltage board interfaces.

Technical Context

The SN74ABT125DE4 implements four independent noninverting buffers, each with dedicated output-enable (OE) control. Each channel transitions between active driving and high-impedance states based solely on its OE input level - low enables, high disables - with no internal feedback or bus arbitration logic.

Its hot-insertion capability relies on two distinct circuits: I_off blocks current flow when V_CC = 0 V, and power-up 3-state holds outputs in Z-state during supply ramp-up/down. These functions operate without external biasing, though OE pull-up to V_CC is recommended to guarantee initial high-Z state.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply voltage (V_CC)	4.5 V to 5.5 V - ensures compatibility with standard 5-V TTL and mixed-supply systems.
Output drive (I_OH/I_OL)	−32 mA / 64 mA - enables direct interface with multiple TTL loads or unterminated transmission lines.
Propagation delay (t_PLH/t_PHL)	1 ns (min) to 4.9 ns (max) at V_CC = 5 V - supports >100-MHz bus toggle rates in short-trace applications.
Input clamp current (I_IK)	−18 mA - limits damage from transient negative inputs, e.g., during hot-swap transients.
Latch-up immunity	>500 mA per JEDEC JESD-17 - guarantees robustness against accidental supply reversal or ground bounce-induced latch-up.
ESD rating (HBM)	2000 V - exceeds standard industrial requirements, reducing need for external protection diodes.
Thermal resistance (θ_JA)	86°C/W (SOIC-D package) - defines maximum power dissipation limit under natural convection (e.g., ≤300 mW at ΔT = 26°C).

Pinout & Package

SN74ABT125DE4 is housed in a 14-pin SOIC (D) package, 3.90 mm wide, 1.75 mm max height, with 1.27 mm lead pitch and Ni/Pd/Au lead finish. Pin 1 index is marked by a beveled corner or dot.

Pin/Terminal	Circuit Role	Design Meaning
1, 4, 10, 13	OE (Output Enable)	Active-low control per channel; high = output high-Z, low = output follows A input.
2, 5, 11, 14	A (Input)	Noninverting data input for corresponding buffer channel (1A–4A).
3, 6, 12, 9	Y (Output)	Noninverting buffered output (1Y–4Y); driven only when associated OE is low.
7	GND	Ground reference for all I/O and internal circuitry; must be low-impedance connection.
14	V_CC	Positive supply (4.5–5.5 V); decoupling capacitor (0.1 µF ceramic) required within 10 mm.

Key Features

Feature	Design Value
Hot-insertion support	I_off and power-up 3-state eliminate backfeed current and bus conflicts during live board insertion.
High-drive outputs	−32 mA/64 mA drive strength allows fanout to ≥10 standard TTL loads without external buffers.
Low ground bounce (VOLP)	<1 V at V_CC = 5 V, T_A = 25°C - reduces noise coupling into adjacent signal or analog sections.
Robust ESD/latch-up	2000-V HBM ESD and >500 mA latch-up rating - meets industrial reliability standards without derating.
Wide operating temperature	−40°C to +85°C ambient range - validated for use in factory automation, telecom line cards, and instrumentation.

Applications

Industrial Backplane Bus Isolation	Test Equipment Signal Routing
Use Scenario: Isolating processor address/data buses from peripheral modules on a multi-slot industrial backplane. IC Role / Device Role / Timing Role: Bidirectional bus buffer enabling hot-swappable module insertion without disrupting active bus traffic. Use Value: I_off prevents backdrive damage during partial power-down; 4.9 ns max propagation delay maintains timing margins in 25-MHz parallel bus systems.	Use Scenario: Routing digital stimulus signals from pattern generators to DUT pins in automated test equipment (ATE). IC Role / Device Role / Timing Role: Output-enable-controlled signal gate that isolates test vectors until DUT is ready. Use Value: 64-mA sink capability drives capacitive ATE cabling directly; 1 ns min delay preserves edge integrity for <5 ns pulse widths.
Legacy System Voltage Translation	Embedded Controller I/O Expansion
Use Scenario: Interfacing 5-V microcontrollers with 3.3-V peripherals where level-shifting ICs are unavailable or cost-prohibitive. IC Role / Device Role / Timing Role: Unidirectional buffer providing current gain and noise margin enhancement at the 5-V side of a mixed-voltage interface. Use Value: VOH ≥2.0 V at I_OH = −24 mA ensures reliable logic-high recognition by 3.3-V CMOS inputs; VOL ≤0.55 V at I_OL = 64 mA guarantees solid logic-low.	Use Scenario: Expanding GPIO count on an ARM-based controller by adding isolated, enable-controlled data paths to sensors and actuators. IC Role / Device Role / Timing Role: Four independent buffer channels managed via GPIO-controlled OE lines for dynamic I/O partitioning. Use Value: Independent OE pins allow per-channel power gating; 86°C/W θ_JA permits operation at full drive in sealed enclosures up to 70°C ambient.

Industrial Backplane Bus Isolation

Test Equipment Signal Routing

Use Scenario: Isolating processor address/data buses from peripheral modules on a multi-slot industrial backplane.

IC Role / Device Role / Timing Role: Bidirectional bus buffer enabling hot-swappable module insertion without disrupting active bus traffic.

Use Value: I_off prevents backdrive damage during partial power-down; 4.9 ns max propagation delay maintains timing margins in 25-MHz parallel bus systems.

Use Scenario: Routing digital stimulus signals from pattern generators to DUT pins in automated test equipment (ATE).

IC Role / Device Role / Timing Role: Output-enable-controlled signal gate that isolates test vectors until DUT is ready.

Use Value: 64-mA sink capability drives capacitive ATE cabling directly; 1 ns min delay preserves edge integrity for <5 ns pulse widths.

Legacy System Voltage Translation

Embedded Controller I/O Expansion

Use Scenario: Interfacing 5-V microcontrollers with 3.3-V peripherals where level-shifting ICs are unavailable or cost-prohibitive.

IC Role / Device Role / Timing Role: Unidirectional buffer providing current gain and noise margin enhancement at the 5-V side of a mixed-voltage interface.

Use Value: VOH ≥2.0 V at I_OH = −24 mA ensures reliable logic-high recognition by 3.3-V CMOS inputs; VOL ≤0.55 V at I_OL = 64 mA guarantees solid logic-low.

Use Scenario: Expanding GPIO count on an ARM-based controller by adding isolated, enable-controlled data paths to sensors and actuators.

IC Role / Device Role / Timing Role: Four independent buffer channels managed via GPIO-controlled OE lines for dynamic I/O partitioning.

Use Value: Independent OE pins allow per-channel power gating; 86°C/W θ_JA permits operation at full drive in sealed enclosures up to 70°C ambient.

Equivalent & Alternatives

The following parts are listed as comparable options for similar bus buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74ABT125DR	Same silicon, tape-and-reel packaging (2500 pcs), identical electrical specs and SOIC-D footprint.	No functional difference; selected for automated SMT assembly instead of tube-based manual placement.	Choose SN74ABT125DR for high-volume production; SN74ABT125DE4 suits prototyping and low-volume builds.
SN74LVC125A	Lower drive (−24 mA/24 mA), 1.65–3.6-V supply range, higher input capacitance (4.5 pF vs. 3 pF), no I_off.	Suitable for 3.3-V-only systems but lacks hot-insertion support and cannot replace SN74ABT125DE4 in 5-V or mixed-voltage hot-swap contexts.	Select SN74LVC125A only for cost-sensitive, single-supply 3.3-V designs where hot-swap is not required.

Compared with SN74ABT125DR, SN74ABT125DE4 offers identical performance in a tube format ideal for evaluation and small-batch use; versus SN74LVC125A, it provides superior drive, 5-V compatibility, and essential I_off-based hot-swap safety - making it irreplaceable in industrial backplane and legacy interface roles.

Availability

SN74ABT125DE4 is available at Aetrix Electronics and suitable for industrial backplane bus isolation, automated test equipment signal routing, legacy system voltage translation, and embedded controller I/O expansion requiring stable component supply and long-term manufacturability.

Supply support for SN74ABT125DE4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with over 90 years of innovation in industrial, automotive, and communications markets.

The SN74ABT125 series belongs to TI's ABT logic family, engineered for high-speed, high-drive 5-V TTL-compatible bus interfacing in mission-critical industrial and telecom infrastructure where reliability under dynamic insertion and electrical stress is mandatory.

FAQ

What is the maximum output current rating for SN74ABT125DE4?

The SN74ABT125DE4 supports −32 mA high-level output current (I_OH) and 64 mA low-level output current (I_OL) under recommended operating conditions. These values are specified at V_CC = 4.5 V and ensure reliable driving of multiple TTL loads or moderate-capacitance traces without external amplification. Exceeding these ratings risks thermal overstress or parametric shift.

Does SN74ABT125DE4 support hot insertion, and how is it implemented?

Yes, SN74ABT125DE4 supports hot insertion via two integrated features: I_off circuitry disables outputs when V_CC = 0 V to prevent damaging back-current, and power-up 3-state forces outputs into high-impedance during supply ramp-up/down. These functions require no external components, though tying OE to V_CC via a pull-up resistor ensures deterministic startup behavior in the SN74ABT125DE4.

What is the operating temperature range for SN74ABT125DE4?

The SN74ABT125DE4 is rated for operation from −40°C to +85°C ambient temperature. This industrial-grade range is validated per TI's production testing and applies specifically to the SOIC-D package variant (SN74ABT125DE4), making it suitable for deployment in factory automation controllers, outdoor telecom equipment, and other environments with uncontrolled thermal profiles.

Can SN74ABT125DE4 be used in 3.3-V systems?

No - SN74ABT125DE4 requires a minimum V_CC of 4.5 V and is not characterized for reliable operation below that threshold. Its input thresholds (VIH = 2.0 V, VIL = 0.8 V) and output levels (VOH ≥ 2.0 V at −24 mA) are optimized for 5-V TTL compatibility. For 3.3-V systems, TI recommends SN74LVC125A or SN74ALVC125, which are explicitly specified down to 1.65 V.

What package type and dimensions does SN74ABT125DE4 use?

SN74ABT125DE4 uses a 14-pin SOIC (D) package: 8.65 mm × 3.90 mm body size, 1.75 mm maximum height, 1.27 mm lead pitch, and Ni/Pd/Au lead finish. The package drawing is TI's D0014A, compliant with JEDEC MS-012AB, and includes a gull-wing lead form suitable for standard reflow soldering profiles including Level-1-260°C.

SN74ABT125DE4 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74ABT

Package/Case:: 14-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Discontinued at Digi-Key

Logic Type:: Buffer, Non-Inverting

Number of Elements:: 4

Number of Bits per Element:: 1

Input Type:: -

Output Type:: 3-State

Current - Output High, Low:: 32mA, 64mA

Voltage - Supply:: 4.5V ~ 5.5V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-SOIC

SN74ABT125DE4 FAQ

1.How can I place an order for SN74ABT125DE4 through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74ABT125DE4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for SN74ABT125DE4 reliable?

The price and inventory of SN74ABT125DE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT125DE4 is usually 5 days.

3.What payment methods are accepted for SN74ABT125DE4?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT125DE4 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74ABT125DE4?

SN74ABT125DE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74ABT125DE4 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for SN74ABT125DE4?

For technical support, including SN74ABT125DE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT125DE4 requirements.

6.How does Aetrix verify that SN74ABT125DE4 is sourced from the original manufacturer or authorized distributors?

All SN74ABT125DE4 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN74ABT125DE4 meets industry standards.

7.What is the process for return or replacement of SN74ABT125DE4?

All SN74ABT125DE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT125DE4, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The SN74ABT125DE4 part is unused and in its original packaging.

Return procedure for SN74ABT125DE4:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…