My Inquiry
My Account
onsemi 74LVTH125M
- Part No.:
- 74LVTH125M
- Manufacturer:
- onsemi
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74LVTH125M.pdf
- Description:
- IC BUF NON-INVERT 3.6V 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,317
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74LVTH125M from Fairchild Semiconductor is a low-voltage quad non-inverting buffer with 3-STATE outputs, designed for 3.3V VCC operation while interfacing to 5V TTL systems. It delivers ±32mA/±64mA drive strength, supports –40°C to +85°C operation, and features bushold inputs eliminating external pull-ups - used in bus buffering and level translation in industrial control backplanes.
For engineers reviewing the 74LVTH125M datasheet, pinout, applications, or equivalent options, key selection criteria include 3.3V-compatible 5V-tolerant I/O, high-current 3-STATE drive capability, live insertion support, and bushold input functionality for unused input management.
Technical Context
The 74LVTH125M implements four independent BiCMOS-based non-inverting buffers with active-low 3-STATE enable logic per channel. Its architecture enables simultaneous 3.3V core operation and 5V-tolerant I/O, validated by VI ratings up to 5.5V and VO tolerance to 7.0V in all states.
Bushold circuitry maintains stable logic levels on un-driven inputs without external resistors, and power-up/down high-impedance behavior prevents bus contention during supply transitions. Dynamic performance includes tPLH/tPHL ≤ 4.5 ns at 3.3V with 50 pF load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7V to 3.6V - ensures compatibility with standard 3.3V supply rails and margin for voltage droop |
| IOH/IOL | –32mA / +64mA - drives heavy capacitive loads and multiple TTL inputs without external buffers |
| tPLH, tPHL | ≤ 4.5 ns (max) at VCC = 3.3V, CL = 50pF - supports >100 MHz bus timing in short trace applications |
| VIH/VIL | 2.0V / 0.8V - compatible with both 3.3V LVTTL and 5V TTL logic thresholds |
| Bushold Current | ±75 µA at VI = 0.8V/2.0V - actively holds floating inputs at valid logic levels without pull-up/pull-down resistors |
| Operating Temp | –40°C to +85°C - qualified for industrial temperature environments without derating |
| ESD Rating | HBM > 2000V - meets JEDEC JESD22-A114 reliability requirements for handling and assembly |
Pinout & Package
74LVTH125M is housed in a 14-lead SOIC package (JEDEC MS-012, 0.150" narrow body), with 1.27 mm lead pitch and gull-wing leads. The package is lead-free per JEDEC J-STD-020B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | Buffer Inputs (A1–A4) | Non-inverting data inputs with bushold; tolerate up to 5.5V regardless of VCC |
| 2, 5, 9, 12 | Output Enables (B1–B4) | Active-low enables; each controls one buffer's 3-STATE output independently |
| 3, 6, 8, 11 | 3-STATE Outputs (O1–O4) | High-drive outputs capable of sourcing –32mA or sinking +64mA in active state |
| 7 | GND | Ground reference for all logic and I/O; separate from power return path in layout-sensitive designs |
| 14 | VCC | 3.3V supply input; decoupling capacitor required within 1 cm for stable high-speed switching |
Key Features
| Feature | Design Value |
|---|---|
| 5V-tolerant I/O at 3.3V VCC | Enables direct connection to legacy 5V TTL buses without level shifters or voltage dividers |
| Bushold input circuitry | Eliminates need for 10kΩ pull-up resistors on unused inputs, reducing BOM count and board space |
| Live insertion/extraction support | Allows hot-swap of daughter cards or modules without system reset or bus lockup |
| Glitch-free power-up/down 3-STATE | Prevents transient bus contention during power sequencing in multi-rail systems |
| High sink/source drive | Drives ≥10 LVTTL loads or ≥5 TTL loads per output, reducing need for fanout buffers |
Applications
| Industrial Backplane Buffering | Memory Address Bus Driver |
|---|---|
|
Use Scenario: Driving shared address/data lines across modular PLC I/O racks with mixed 3.3V and 5V modules. IC Role / Device Role / Timing Role: Quad buffer isolates and strengthens signals between controller and peripheral slots; 3-STATE enables bidirectional bus arbitration. Use Value: Bushold inputs prevent floating states during module removal; 64mA sink current handles stub capacitance and noise margins in long backplane traces. |
Use Scenario: Strengthening address lines from an FPGA to multiple SRAM chips on a memory expansion card. IC Role / Device Role / Timing Role: Non-inverting buffer with fast propagation (<4.5 ns) ensures setup/hold timing compliance across distributed loads. Use Value: 5V-tolerant inputs accept FPGA I/O at 3.3V while driving 5V SRAM address pins directly - no level shifter needed. |
| Hot-Swappable Communication Module | Legacy Interface Adapter |
|
Use Scenario: Enabling safe insertion/removal of RS-485 or CAN interface cards into powered industrial controllers. IC Role / Device Role / Timing Role: 3-STATE buffers isolate module I/O from main bus during insertion; bushold holds control lines stable pre-initialization. Use Value: Live insertion support eliminates system downtime; glitch-free power-up prevents bus corruption during card boot sequence. |
Use Scenario: Interfacing modern 3.3V microcontrollers to legacy 5V peripheral ICs (e.g., UARTs, display drivers). IC Role / Device Role / Timing Role: Voltage-level translator and signal repeater - accepts 3.3V logic, outputs robust 5V-compatible signals. Use Value: Eliminates discrete resistor networks or dedicated level translators; ±32mA/±64mA drive sustains signal integrity over 10+ inch PCB traces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad buffer with 3-STATE applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC125APW | Lower drive (±24mA), no bushold, 1.65–3.6V VCC; TSSOP-14 only | Lacks 5V-tolerant I/O without external clamping; unsuitable for direct 5V bus interfacing | Select when cost and footprint are prioritized over 5V compatibility and bushold |
| 74ALVC125M | Higher speed (tPD ≤ 3.3 ns), same bushold and 5V-tolerance, but higher ICCZ (0.5 mA vs. 0.19 mA) | Same functional replacement; better for high-frequency clock distribution where leakage matters less | Choose for sub-3ns timing-critical paths where static power is secondary |
Compared with SN74LVC125APW and 74ALVC125M, the 74LVTH125M uniquely balances 5V-tolerant I/O, bushold, and 64mA sink capability at industrial temperature range - making it optimal for legacy-interfacing backplane and hot-swap applications where reliability trumps raw speed or ultra-low quiescent current.
Availability
74LVTH125M is available at Aetrix Electronics and suitable for industrial backplane buffering, memory address driving, hot-swappable communication modules, and legacy interface adaptation requiring stable component supply and long-term lifecycle assurance.
Supply support for 74LVTH125M 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
Fairchild Semiconductor was a U.S.-based semiconductor company specializing in analog and mixed-signal ICs, acquired by ON Semiconductor in 2016; its legacy logic portfolio remains widely deployed in industrial and telecom infrastructure.
The 74LVTH125M belongs to Fairchild's LVTH (Low-Voltage TTL-High Speed) logic family, engineered for 3.3V systems needing robust 5V bus interoperability, high drive, and hot-swap resilience - targeting industrial control, test equipment, and communications hardware.
FAQ
What is the maximum input voltage rating for 74LVTH125M?
The 74LVTH125M supports DC input voltages up to 5.5V across the full operating temperature range (–40°C to +85°C), enabling direct interfacing with 5V TTL signals while powered from a 3.3V supply. This 5V tolerance is explicitly specified in the Recommended Operating Conditions table and verified under VI ≤ 5.5V, not dependent on external clamping diodes or limiting resistors.
Does 74LVTH125M require external pull-up resistors on unused inputs?
No - the 74LVTH125M integrates bushold circuitry on all inputs, which actively maintains a valid logic state (HIGH or LOW) without external components. Per the datasheet, bushold provides ±75 µA minimum holding current at 0.8V/2.0V, eliminating the need for 10kΩ pull-up resistors typically required on standard TTL or CMOS buffers.
What is the output drive capability of 74LVTH125M in LOW and HIGH states?
The 74LVTH125M delivers +64mA sink current (IOL) when output is LOW and –32mA source current (IOH) when output is HIGH, measured at VCC = 3.3V. These values exceed standard LVTTL and match legacy TTL drive strength, allowing direct connection to multiple 74-series loads or termination networks without fanout buffers.
Is 74LVTH125M suitable for hot-swap applications?
Yes - the 74LVTH125M is explicitly characterized for live insertion/extraction, and its power-up/down 3-STATE behavior ensures outputs remain high-impedance during supply ramp-up or ramp-down. This prevents bus contention and signal glitches when modules are inserted or removed from powered systems, as confirmed in the General Description and Features sections.
What package type is used for the 74LVTH125M part number?
The 74LVTH125M uses a 14-lead Small Outline Integrated Circuit (SOIC) package per JEDEC MS-012, 0.150" narrow body (package code M14A). Its dimensions are 8.75 mm × 4.00 mm × 1.75 mm max height, with 1.27 mm lead pitch and gull-wing leads - fully compatible with standard SOIC-14 reflow and wave soldering profiles.
74LVTH125M Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74LVTH
- Package/Case:
- 14-SOIC (0.154", 3.90mm 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:
- 32mA, 64mA
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
74LVTH125M FAQ
1.How can I place an order for 74LVTH125M through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVTH125M 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 74LVTH125M reliable?
The price and inventory of 74LVTH125M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVTH125M is usually 5 days.
3.What payment methods are accepted for 74LVTH125M?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVTH125M transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVTH125M?
74LVTH125M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVTH125M 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 74LVTH125M?
For technical support, including 74LVTH125M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVTH125M requirements.
6.How does Aetrix verify that 74LVTH125M is sourced from the original manufacturer or authorized distributors?
All 74LVTH125M 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 74LVTH125M meets industry standards.
7.What is the process for return or replacement of 74LVTH125M?
All 74LVTH125M units undergo pre-shipment inspection (PSI). If there is an issue with 74LVTH125M, 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 74LVTH125M part is unused and in its original packaging.
Return procedure for 74LVTH125M:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74LVTH125M Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
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.
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…
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…
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…
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 …
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…
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…
