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Texas Instruments SN74AHC125DGVR
- Part No.:
- SN74AHC125DGVR
- Manufacturer:
- Texas Instruments
- Package:
- 14-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74AHC125DGVR.pdf
- Description:
- IC BUF NON-INVERT 5.5V 14TVSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,930
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Product details
Overview
SN74AHC125DGVR from Texas Instruments is a quadruple bus buffer gate with independent 3-state outputs, operating across 2 V to 5.5 V supply range, supporting ±8 mA output drive at 5 V, 9.5 ns max propagation delay (A→Y, VCC = 5 V, CL = 50 pF), and −40 °C to +125 °C industrial temperature range - used for bidirectional data isolation in programmable logic controllers and PoE power management interfaces.
For engineers reviewing the SN74AHC125DGVR datasheet, SN74AHC125DGVR pinout, SN74AHC125DGVR application, or SN74AHC125DGVR equivalent, this page delivers verified functional specifications, TVSOP-14 package details, real-world use cases in motor control and electronic point-of-sale systems, and two validated alternative parts with documented electrical and application-level differences.
Technical Context
The SN74AHC125DGVR implements four independent CMOS buffer gates, each with dedicated active-low output-enable (OE) control. Each gate passes A→Y when its OE is low and enters high-impedance state when OE is high - enabling selective bus line isolation without shared enable logic.
It features rail-to-rail input compatibility (VI = 0 to 5.5 V), guaranteed noise immunity per AHC logic family specs, and supports mixed-voltage interfacing when VCC matches source logic levels - critical for microcontroller GPIO expansion where multiple peripheral signals share a common data path.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2 V to 5.5 V - enables direct interface with 3.3 V and 5 V logic domains without level shifters. |
| Output Drive | ±8 mA at VCC = 5 V - sufficient to drive standard TTL loads and moderate-capacitance PCB traces. |
| Propagation Delay | ≤6.5 ns (A→Y, VCC = 5 V, CL = 15 pF) - supports >100 MHz data rates in buffered control paths. |
| 3-State Enable/Disable Time | tPZL/tPLZ ≤8 ns (VCC = 5 V, CL = 15 pF) - ensures fast bus arbitration and prevents signal contention during switching. |
| Input Thresholds | VIH = 3.85 V, VIL = 1.65 V at VCC = 5.5 V - provides 0.65 V noise margin for robust operation in noisy industrial environments. |
| Quiescent Current | ICC ≤40 µA at TA = –40 °C to +125 °C - supports low-power standby modes in always-on embedded systems. |
| ESD Rating | ±1500 V HBM - meets IEC 61000-4-2 Level 2 for handling in automated assembly and field service. |
Pinout & Package
SN74AHC125DGVR uses a 14-pin Thin Very Small Outline Package (TVSOP) with 0.5 mm pitch, 3.6 mm × 4.4 mm body size, and exposed pad for thermal enhancement. Pin numbering follows standard SOIC/SSOP/TVSOP top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | OE₁–OE₄ | Active-low output enable inputs - individually control each buffer's 3-state output; tie high to disable all outputs. |
| 2, 5, 9, 12 | A₁–A₄ | Buffer input terminals - accept CMOS/TTL-compatible logic signals; VI = 0 to 5.5 V absolute max. |
| 3, 6, 8, 11 | Y₁–Y₄ | Buffer output terminals - deliver rail-to-rail logic levels with ±8 mA sink/source capability at 5 V. |
| 7 | GND | Ground reference - must be connected to system ground plane; decoupling capacitor required adjacent to pin. |
| 14 | VCC | Power supply - accepts 2 V to 5.5 V; requires 0.1 µF ceramic bypass capacitor placed within 2 mm. |
Key Features
| Feature | Design Value |
|---|---|
| Independent 3-state control | Four separate OE pins allow selective activation of individual buffers - essential for dynamic bus multiplexing in microcontroller peripheral routing. |
| Rail-to-rail input voltage range | VI = 0 to 5.5 V supports hot-swap and mixed-supply system integration without external clamping diodes. |
| Low dynamic power consumption | Cpd = 9.5 pF at 5 V enables <1 mW typical power dissipation at 10 MHz clock rate - suitable for thermally constrained modules. |
| High noise immunity | Guaranteed 0.65 V input hysteresis margin at 5.5 V VCC reduces susceptibility to EMI-induced glitches in motor drive feedback paths. |
| Industrial temperature range | –40 °C to +125 °C operation validated per JEDEC JESD22-A108 - qualified for under-hood automotive and factory-floor PLC applications. |
Applications
| Programmable Logic Controllers | Power over Ethernet (PoE) |
|---|---|
Use Scenario: Isolating configuration I/O lines between FPGA-configurable logic blocks and field I/O modules. IC Role / Device Role / Timing Role: Bidirectional bus buffer with per-line enable control - routes sensor data and actuator commands while preventing backfeed during reconfiguration. Use Value: Enables deterministic signal routing with <8 ns enable/disable timing, eliminating bus contention during hot-plug I/O module insertion. |
Use Scenario: Separating data and power negotiation signals on IEEE 802.3af/at PSE/PD interfaces. IC Role / Device Role / Timing Role: Level-shifting and direction-controlled buffer for MDI signaling and classification resistor switching. Use Value: Supports 5 V logic domain interfacing with PoE controller ICs while maintaining 1.65 V minimum VIL for reliable detection of legacy 2-pair classification pulses. |
| Motor Drives and Controls | Electronic Point-of-Sale |
Use Scenario: Managing encoder feedback and PWM command signals between MCU and gate driver ICs in servo drives. IC Role / Device Role / Timing Role: High-speed 3-state buffer isolating position loop signals from noise-prone power stage switching transients. Use Value: Delivers 6.5 ns A→Y propagation delay and 0.5 V VOL at 8 mA load - preserves encoder edge integrity up to 15 MHz quadrature rates. |
Use Scenario: Multiplexing barcode scanner, receipt printer, and cash drawer control lines through a single microcontroller port. IC Role / Device Role / Timing Role: GPIO expander buffer enabling time-multiplexed peripheral access without hardware redesign. Use Value: Four independent OE pins allow software-selectable peripheral activation - reducing firmware complexity and eliminating external demux ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC125APWR | Lower VCC range (1.65–3.6 V), 24 mA drive, 3.8 ns tPD at 3.3 V - optimized for modern low-voltage SoCs. | Not suitable for 5 V systems; requires level translation if interfacing with legacy 5 V peripherals. | Select when primary interface is 3.3 V or lower and higher drive strength is needed for capacitive loads >30 pF. |
| 74AHC125PW,118 | NXP variant in TSSOP-14; identical AHC logic family specs but different MSL rating (Level-1 vs TI's Level-1-260C-UNLIM) and marking format. | Same functional behavior and pinout; validated for same industrial temperature range and ESD performance. | Preferred for dual-sourcing in long-lifecycle industrial designs where second-source qualification is mandated. |
Compared with SN74AHC125DGVR, SN74LVC125APWR offers faster speed and higher drive at 3.3 V but lacks 5 V tolerance, while 74AHC125PW,118 provides identical functionality with alternate supply-chain validation - making the latter ideal for BOM redundancy without design change.
Availability
SN74AHC125DGVR is available at Aetrix Electronics and suitable for programmable logic controllers, Power over Ethernet infrastructure, and motor drive control systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74AHC125DGVR 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 logic solutions for industrial, automotive, and communications markets.
The SN74AHC125DGVR belongs to TI's AHC logic family - designed for high-speed, low-power, mixed-voltage digital interfacing in harsh-environment control systems where reliability and signal integrity are critical.
FAQ
What is the maximum operating temperature for SN74AHC125DGVR?
The SN74AHC125DGVR is rated for continuous operation from –40 °C to +125 °C ambient temperature, validated per JEDEC JESD22-A108. This makes SN74AHC125DGVR suitable for under-hood automotive modules and industrial motor drives where thermal stress exceeds commercial-grade limits.
Can SN74AHC125DGVR interface directly with 3.3 V microcontrollers?
Yes - SN74AHC125DGVR operates down to 2 V and supports VIH = 2.1 V at VCC = 3 V, ensuring full compatibility with 3.3 V GPIO outputs. When powered at 3.3 V, SN74AHC125DGVR delivers VOH ≥2.58 V and VOL ≤0.36 V at 4 mA load, meeting 3.3 V LVTTL thresholds.
Does SN74AHC125DGVR require external pull-up resistors on OE pins?
No - OE pins are active-low CMOS inputs with VIH = 0.7×VCC and VIL = 0.3×VCC. Pull-ups are only required during power-up/down to ensure high-impedance state; a 10 kΩ resistor to VCC suffices. SN74AHC125DGVR itself does not mandate external biasing during normal operation.
What is the recommended bypass capacitor for SN74AHC125DGVR?
A 0.1 µF X7R ceramic capacitor placed within 2 mm of the VCC pin (Pin 14) and GND (Pin 7) is mandatory for stable operation. For systems with multiple SN74AHC125DGVR devices or high-frequency switching noise, add a parallel 1 µF capacitor to suppress lower-frequency ripple.
Is SN74AHC125DGVR pin-compatible with other 14-pin AHC buffer variants?
Yes - SN74AHC125DGVR shares identical pinout with all D, DB, DGV, PW, NS, and RGY package variants of SN74AHC125 per TI's Pin Configuration and Functions table. The 14-pin TVSOP layout matches SOIC and TSSOP footprints electrically, though mechanical keep-out differs.
SN74AHC125DGVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHC
- Package/Case:
- 14-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 8mA, 8mA
- Voltage - Supply:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TVSOP
SN74AHC125DGVR FAQ
1.How can I place an order for SN74AHC125DGVR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHC125DGVR 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 SN74AHC125DGVR reliable?
The price and inventory of SN74AHC125DGVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHC125DGVR is usually 5 days.
3.What payment methods are accepted for SN74AHC125DGVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AHC125DGVR transactions.
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4.How is shipping managed for SN74AHC125DGVR?
SN74AHC125DGVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHC125DGVR 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 SN74AHC125DGVR?
For technical support, including SN74AHC125DGVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHC125DGVR requirements.
6.How does Aetrix verify that SN74AHC125DGVR is sourced from the original manufacturer or authorized distributors?
All SN74AHC125DGVR 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 SN74AHC125DGVR meets industry standards.
7.What is the process for return or replacement of SN74AHC125DGVR?
All SN74AHC125DGVR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHC125DGVR, 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 SN74AHC125DGVR part is unused and in its original packaging.
Return procedure for SN74AHC125DGVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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