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Texas Instruments SN74ALVC125PWG4
- Part No.:
- SN74ALVC125PWG4
- Manufacturer:
- Texas Instruments
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74ALVC125PWG4.pdf
- Description:
- IC BUF NON-INVERT 3.6V 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,593
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Product details
Overview
SN74ALVC125PWG4 from Texas Instruments is a quadruple bus buffer gate with 3-state outputs, designed for 1.65 V to 3.6 V operation in low-voltage digital systems. It provides four independent non-inverting buffers, each controlled by a dedicated output-enable (OE) input, enabling bidirectional bus isolation in memory interfaces, data routing, and level-translating logic subsystems.
For engineers reviewing the SN74ALVC125PWG4 datasheet, SN74ALVC125PWG4 pinout, SN74ALVC125PWG4 application, or SN74ALVC125PWG4 equivalent, key selection criteria include its 2.8 ns max propagation delay at 3.3 V, ±24-mA drive strength, TSSOP-14 package footprint, and guaranteed 3-state behavior during power-up when OE is pulled high.
Technical Context
This device implements four independent CMOS buffer stages, each with active-low 3-state control logic - output goes high-impedance when OE is high. All inputs are 5-V tolerant across the full 1.65–3.6 V supply range, supporting mixed-voltage interfacing without external level shifters.
It features robust ESD protection exceeding 2000-V HBM, latch-up immunity >250 mA per JESD 17, and operates reliably from –40°C to +85°C. The design targets low-noise, low-power bus driving where precise timing control and output disable sequencing are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.65 V to 3.6 V - Enables interoperability across 1.8-V, 2.5-V, and 3.3-V logic domains |
| Max Propagation Delay | 2.8 ns at 3.3 V - Supports high-speed data routing up to ~350 MHz system clock edges |
| Output Drive Strength | ±24 mA at 3.3 V - Sustains signal integrity driving 50-pF loads or multiple CMOS inputs |
| Input Voltage Tolerance | 0 V to 3.6 V - Accepts 5-V-tolerant inputs without damage or clamping diodes required |
| 3-State Enable Polarity | Active-high OE - Output disables (high-Z) when OE = HIGH; enables when OE = LOW |
| Operating Temperature | –40°C to +85°C - Qualified for industrial-grade embedded and communications equipment |
Pinout & Package
TSSOP-14 (PW) package: 4.4 mm × 5.0 mm body, 0.65 mm lead pitch, 1.2 mm max height, gull-wing leads, RoHS-compliant NiPdAu finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | OE₁, OE₂, OE₃, OE₄ | Independent 3-state enable inputs - each controls one buffer's output impedance |
| 2, 5, 11, 14 | A₁, A₂, A₃, A₄ | Data inputs - non-inverting buffer inputs referenced to VCC/GND |
| 3, 6, 12, 9 | Y₁, Y₂, Y₃, Y₄ | Buffered outputs - driven low/high when OE = LOW; high-Z when OE = HIGH |
| 7 | GND | Ground reference - must be connected to system ground plane for noise immunity |
| 14 | VCC | Power supply - decoupling capacitor (0.1 µF ceramic) required within 1 cm of pin |
Key Features
| Feature | Design Value |
|---|---|
| 1.65-V to 3.6-V VCC operation | Supports single-supply interface between 1.8-V microcontrollers and 3.3-V peripherals |
| 5-V tolerant inputs | Eliminates need for external level translators when interfacing legacy 5-V logic |
| ±24-mA output drive at 3.3 V | Drives ≥10 LVTTL loads or 50-pF PCB traces without signal degradation |
| 2.8 ns max tpd at 3.3 V | Enables sub-350-MHz data path timing margins in synchronous bus applications |
| High-impedance state on power-up | OE tied to VCC via pullup ensures outputs remain disabled until system initialization completes |
Applications
| Memory Address/Data Bus Isolation | Low-Voltage Microcontroller I/O Expansion |
|---|---|
Use Scenario: Isolating address/data lines between a 1.8-V SoC and 3.3-V SRAM or Flash memory. IC Role / Device Role / Timing Role: Bidirectional bus buffer with independent OE control per channel, enabling selective read/write gating without contention. Use Value: Prevents back-driving and bus contention during memory access arbitration; supports 2.8 ns timing alignment across all four channels. |
Use Scenario: Expanding GPIO count of an ARM Cortex-M0+ MCU operating at 1.8 V while driving 3.3-V sensors and displays. IC Role / Device Role / Timing Role: Level-translating buffer with 5-V-tolerant inputs and 3.3-V-compatible outputs, synchronized to MCU clock domain. Use Value: Eliminates discrete level shifters; ±24-mA drive directly interfaces LED segments and I²C pull-ups without external transistors. |
| FPGA Configuration Interface Buffering | Industrial PLC Digital I/O Module |
Use Scenario: Driving configuration data from a 3.3-V FPGA configuration controller to multiple 1.8-V FPGA banks. IC Role / Device Role / Timing Role: Quad non-inverting buffer with per-channel OE, allowing staggered bank programming sequences. Use Value: Ensures clean, glitch-free configuration bitstream delivery with <2.8 ns skew between channels. |
Use Scenario: Isolating field-side 24-V digital inputs from a 3.3-V logic controller in DIN-rail mounted I/O modules. IC Role / Device Role / Timing Role: Input conditioning buffer with high-noise-immunity thresholds and fast enable/disable transitions. Use Value: Meets IEC 61000-4-4 EFT immunity requirements via robust input clamp structure and fast 3-state recovery (<4 ns). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC125APW | Same TSSOP-14 package; lower drive (±24 mA only at 3.3 V, reduced at 1.8 V); identical 1.65–3.6 V range | Suitable for cost-sensitive 3.3-V-only systems where 1.8-V operation is not required | Prefer SN74ALVC125PWG4 when 1.8-V compatibility or guaranteed 24-mA drive at 1.8 V is needed |
| 74AVC125T14X | Different manufacturer (Nexperia); same pinout; slightly faster tpd (2.5 ns @ 3.3 V); higher ICC (15 µA vs. 10 µA) | Better suited for ultra-low-skew applications but requires revalidation of power supply filtering | Choose SN74ALVC125PWG4 for TI-qualified industrial temperature support and documented latch-up immunity >250 mA |
Compared with SN74LVC125APW and 74AVC125T14X, SN74ALVC125PWG4 delivers superior 1.8-V drive capability, tighter ESD/latch-up specifications, and broader industrial qualification - making it optimal for mixed-voltage, safety-critical, or long-lifecycle designs.
Availability
SN74ALVC125PWG4 is available at Aetrix Electronics and suitable for industrial automation controllers, medical diagnostic interfaces, and automotive infotainment head units requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for SN74ALVC125PWG4 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 50 years of innovation in high-reliability logic and interface solutions.
The SN74ALVC125PWG4 belongs to TI's ALVC (Advanced Low-Voltage CMOS) logic family, engineered for low-power, high-speed bus interfacing in portable, industrial, and communications equipment operating across 1.65–3.6 V rails.
FAQ
What is the recommended power-up sequence for SN74ALVC125PWG4 to avoid bus contention?
TI recommends tying all OE pins to VCC through a pullup resistor (minimum value determined by driver sink capability) to ensure outputs remain in high-impedance state during power ramp-up. This prevents unintended driving before the host controller initializes. The SN74ALVC125PWG4's internal circuitry guarantees high-Z behavior at VCC < 0.8 V, but external pullups provide deterministic control. Always verify OE voltage exceeds VIH(min) before enabling any buffer.
Does SN74ALVC125PWG4 support hot-swap or live-insertion applications?
SN74ALVC125PWG4 is not rated for hot-swap operation. Its absolute maximum ratings specify no current injection during power-off conditions, and the input clamp structure is not designed for sustained I/O biasing while VCC = 0 V. For live-insertion, use TI's dedicated hot-swap buffers like the TPS229xx series. The SN74ALVC125PWG4 should only be powered and operated within its specified 1.65–3.6 V VCC and –40°C to +85°C ambient range.
Can SN74ALVC125PWG4 drive a 50-Ω transmission line directly?
No - SN74ALVC125PWG4 is not designed for direct 50-Ω line driving. Its ±24-mA output drive is optimized for capacitive loads (≤50 pF) and fanout into CMOS/LVTTL inputs. For 50-Ω termination, use a dedicated line driver IC (e.g., SN65LVDS1/2) or add series termination (e.g., 33 Ω) with proper PCB impedance control. Driving 50 Ω directly would exceed continuous output current limits and cause excessive VOL/VOH deviation.
Is SN74ALVC125PWG4 pin-compatible with SN74LVC125APW?
Yes - SN74ALVC125PWG4 and SN74LVC125APW share identical TSSOP-14 (PW) package dimensions, pinout, and terminal numbering. Both follow JEDEC MO-153 and TI's PW0014A outline. However, SN74ALVC125PWG4 offers enhanced 1.8-V performance and stricter latch-up immunity, so functional substitution is valid but electrical validation at lowest VCC is recommended.
What is the maximum capacitive load SN74ALVC125PWG4 can drive while maintaining 2.8 ns propagation delay?
At VCC = 3.3 V and TA = 25°C, SN74ALVC125PWG4 maintains ≤2.8 ns tpd driving a 30-pF load (per TI test condition in SCES110H). With 50-pF load, typical tpd increases to ~3.5 ns. For designs requiring strict 2.8 ns compliance, limit total node capacitance (including PCB trace, probe, and input capacitance of downstream devices) to ≤30 pF. Use Co = 5.5 pF (output capacitance) and Ci = 3.5 pF (input capacitance) values from the datasheet for accurate modeling.
SN74ALVC125PWG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALVC
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- 24mA, 24mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
SN74ALVC125PWG4 FAQ
1.How can I place an order for SN74ALVC125PWG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALVC125PWG4 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 SN74ALVC125PWG4 reliable?
The price and inventory of SN74ALVC125PWG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVC125PWG4 is usually 5 days.
3.What payment methods are accepted for SN74ALVC125PWG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALVC125PWG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ALVC125PWG4?
SN74ALVC125PWG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALVC125PWG4 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 SN74ALVC125PWG4?
For technical support, including SN74ALVC125PWG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVC125PWG4 requirements.
6.How does Aetrix verify that SN74ALVC125PWG4 is sourced from the original manufacturer or authorized distributors?
All SN74ALVC125PWG4 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 SN74ALVC125PWG4 meets industry standards.
7.What is the process for return or replacement of SN74ALVC125PWG4?
All SN74ALVC125PWG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVC125PWG4, 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 SN74ALVC125PWG4 part is unused and in its original packaging.
Return procedure for SN74ALVC125PWG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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