SN74AHCT125DIn StockTexas Instruments
Quadruple bus buffer gate IC with 3-state outputs and AHCT logic family. Features 4 independent channels with active-low enable control, 50pF load capacitance, and 8mA output current. From $0.13, in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 14
- Lifecycle
- OBSOLETE
- Datasheet
- SN74AHCT125D Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.1264(MOQ 1)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 4 independent bus buffer channels with 3-state outputs for flexible bus control
- Active-low enable (OE) per channel allows easy bus isolation and signal direction control
- AHCT logic family: 5V tolerant inputs with CMOS-compatible outputs, ideal for mixed-voltage designs
- Low propagation delay and high drive strength: 8mA sink current with 50pF load capacitance
- Available in compact 14-pin SOIC package for space-constrained PCB layouts
Applications
The SN74AHCT125D is widely used in microcontroller and FPGA systems to buffer and isolate data buses, preventing signal contention between multiple devices. It is commonly deployed in memory interface circuits, bus expansion applications, and level-shifting designs where 5V-tolerant inputs must drive CMOS logic outputs. The 3-state output capability makes it ideal for shared-bus architectures in industrial controllers, communication equipment, and embedded computing platforms.
Specifications
| YTEOL | 0 |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | AHCT/VHCT/VT |
| JESD-30 Code | R-PDSO-G14 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS DRIVER |
| Max I(ol) | 0.008A |
| Number of Bits | 1 |
| Number of Functions | 4 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP14,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TUBE |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 0.02mA |
| Prop. Delay@Nom-Sup | 8.5ns |
| Propagation Delay (tpd) | 8.5ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Trigger Type | POSITIVE EDGE |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74AHCT125D:
Bus Driver, AHCT/VHCT/VT Series, 4-Func, 1-Bit, True Output, CMOS, PDSO14
Bus Driver, AHCT/VHCT/VT Series, 4-Func, 1-Bit, True Output, CMOS, PDSO14
Bus Driver, AHCT/VHCT/VT Series, 4-Func, 1-Bit, True Output, CMOS, PDSO14
Bus Driver, AHCT/VHCT/VT Series, 4-Func, 1-Bit, True Output, CMOS, PDSO14
Bus Driver, AHCT/VHCT/VT Series, 4-Func, 4-Bit, True Output, CMOS, PDSO14
Frequently Asked Questions
What is the SN74AHCT125D and what does it do?
The SN74AHCT125D is a quadruple bus buffer gate IC from Texas Instruments featuring 3-state outputs. It contains 4 independent unidirectional buffer channels, each controlled by an active-low output enable (OE) pin. When enabled, it drives signals from input to output with minimal delay; when disabled, the output enters a high-impedance state, allowing multiple devices to share a common bus without conflict.
What are the key electrical specifications of the SN74AHCT125D?
The SN74AHCT125D operates with a 5V supply voltage and belongs to the AHCT/VHCT/VT logic family. It supports a maximum output sink current (I_ol) of 8mA, a load capacitance of 50pF, and 5V-tolerant inputs compatible with both TTL and CMOS logic levels. It is rated for industrial temperature ranges and packaged in a 14-pin Small Outline (SOIC) package (JESD-30 Code: R-PDSO-G14).
What are typical applications for the SN74AHCT125D?
The SN74AHCT125D is commonly used in bus buffering, signal isolation, and bus expansion circuits in embedded systems, microcontroller boards, and FPGAs. It is well-suited for mixed-voltage designs where 5V-tolerant inputs interface with CMOS outputs. Typical applications include data bus drivers, memory interfaces, communication bus isolation, and shared-bus architectures in industrial and consumer electronics.
Are there compatible alternatives or pin-compatible replacements for the SN74AHCT125D?
Yes, the SN74AHCT125D is functionally and pin-compatible with other AHCT125 variants such as the SN74AHCT125N (DIP package), SN74AHCT125PW (TSSOP package), and SN74AHCT125QPWRQ1 (automotive-grade). Other logic family alternatives include the 74HCT125 and 74ACT125 from multiple manufacturers. Always verify supply voltage, speed grade, and package footprint before substituting.
What package options are available for the SN74AHCT125D and how do I order it?
The SN74AHCT125D comes in a 14-pin Small Outline Integrated Circuit (SOIC) package with 3.9mm body width, suitable for surface-mount PCB assembly. Texas Instruments also offers this device in DIP (SN74AHCT125N) and TSSOP (SN74AHCT125PW) packages. It is available for purchase from authorized distributors worldwide, with pricing starting from approximately $0.13 per unit in quantity.
Related Guides
Ultra Low Power Microcontroller Comparison 2026: STM32L4 vs MSP430 vs MSP432 vs CC2640
Engineer-grade 2026 comparison of ultra-low-power MCUs — STM32L476, MSP430A139, MSP432P401R, CC2640F128 across standby current, active current, and battery life.
May 5, 2026
BOM Cost Reduction: 7 Strategies for Electronics Manufacturers in 2026
Practical 2026 BOM optimization playbook — 7 proven strategies, ranked by payback time and risk. With realistic per-unit savings and verification steps.
May 5, 2026
STM32F072C8T6 Pin-Compatible Alternatives 2026: Cheaper Drop-In Options Compared
Engineer-grade compatibility analysis for STM32F072C8T6 alternatives in 2026 — pin compatibility, firmware portability, cost and lead time for each option.
May 5, 2026
Top Microcontrollers for IoT 2026: ESP32 vs Arduino vs STM32 vs RPi Pico
The five IoT MCU platforms compared on 2026 pricing, lead time, and use case — ESP32-S3, Arduino, STM32F0, RP2040, TI CC2640/CC1352P.
May 5, 2026
Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.2370 | $0.24 |
| 52+ | $0.1580 | $8.22 |
| 317+ | $0.1264 | $40.07 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”