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

STMicroelectronics 74LVX125TTR

Name: 74LVX125TTR
Brand: STMicroelectronics
SKU: 74LVX125TTR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74LVX125TTR

Manufacturer:: STMicroelectronics

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 14-TSSOP (0.173", 4.40mm Width)

Datasheet:: 74LVX125TTR.pdf

Description:: IC BUF NON-INVERT 3.6V 14TSSOP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

74LVX125TTR from STMicroelectronics is a low-voltage CMOS quad 3-state bus buffer with 5V-tolerant inputs, operating from 2V to 3.6V supply. It delivers 4.4ns typical propagation delay at 3.3V, ±4mA symmetrical output drive, and 2µA max quiescent current-enabling low-power, noise-sensitive 3.3V system interfacing between 5V and 3V logic domains.

For engineers reviewing the 74LVX125TTR datasheet, 74LVX125TTR pinout, 74LVX125TTR application, or 74LVX125TTR equivalent, key selection criteria include 5V input tolerance, 3-state enable timing (tPZL/tPLZ), output impedance matching, ESD immunity (2kV HBM), and TSSOP-14 package compatibility in space-constrained mixed-voltage PCBs.

Technical Context

The device implements four independent non-inverting buffers, each controlled by a dedicated active-high 3-state enable input (1G–4G). All inputs accept 0–7V regardless of VCC, enabling safe level translation without external clamping.

Its sub-micron C2MOS process ensures latch-up immunity and rail-to-rail output swing under load, while balanced tPLH ≅ tPHL and low VOLP (0.3V typ.) minimize ground bounce and crosstalk in high-density digital buses.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2V to 3.6V - supports battery-backed 2.5V/3.3V systems with 1.2V data retention
t_PD	4.4ns (typ) at V_CC=3.3V, CL=15pF - enables >100MHz bus operation in short trace layouts
I_OH/I_OL	±4mA (min) at V_CC=3V - drives standard CMOS loads across full voltage range
V_IL/V_IH	0.8V / 2.0V at V_CC=3V - compatible with TTL and 3.3V LVTTL logic thresholds
Input Tolerance	0–7V independent of V_CC - allows direct connection to 5V signals without level shifters
ICC (Quiescent)	2µA (max) at T_A=25°C - suitable for always-on battery-powered monitoring nodes
ESD Rating	2kV HBM - protects against handling-induced discharge in assembly and field service

Pinout & Package

TSSOP-14 package: 4.4mm × 5.0mm body, 0.65mm pitch, 1.2mm max height, gull-wing leads. RoHS-compliant, moisture sensitivity level 1.

Pin/Terminal	Circuit Role	Design Meaning
1, 4, 10, 13	1G–4G (OE)	Active-high 3-state enable inputs - drive high to disable outputs (Z-state)
2, 5, 9, 12	1A–4A (IN)	Buffer data inputs - tolerate 0–7V regardless of V_CC supply
3, 6, 8, 11	1Y–4Y (OUT)	Non-inverting buffered outputs - deliver rail-aligned logic levels with ±4mA drive
7	GND	Ground reference - decoupling capacitor must be placed adjacent to pin 7
14	V_CC	Positive supply - requires local 100nF ceramic bypass between pins 14 and 7

Key Features

Feature	Design Value
5V-tolerant inputs	Enables direct interface between legacy 5V peripherals and modern 3.3V microcontrollers without external resistors or translators
Power-down protection	Inputs remain safe and non-latching even when V_CC = 0V - critical for hot-swap and partial-power-down systems
Low dynamic noise (VOLP = 0.3V)	Reduces simultaneous switching noise on shared V_CC/GND rails in multi-buffer configurations
Symmetrical output drive	Ensures matched rise/fall times and consistent signal integrity across bidirectional data lanes
Pin-compatible with 74-series 125	Allows drop-in replacement in existing 74HC/HCT/LS designs with no layout change required

Applications

Industrial PLC I/O Expansion

Portable Medical Sensor Hub

Use Scenario: Isolating and buffering digital I/O lines between 5V fieldbus modules and 3.3V ARM-based controller.

IC Role / Device Role / Timing Role: Level-translating bus buffer with 3-state control for time-multiplexed address/data sharing.

Use Value: Eliminates need for discrete level shifters; 4.4ns delay preserves timing margin in 20MHz parallel bus cycles.

Use Scenario: Aggregating multiple low-power analog sensor outputs (ADC, temp, motion) into a shared SPI/I²C interface.

IC Role / Device Role / Timing Role: Low-noise signal conditioner and bus isolator during sleep/wake transitions.

Use Value: 2µA quiescent current extends battery life; 2kV ESD withstand protects sensitive front-end circuitry.

Automotive Body Control Module

Test Equipment Digital Pattern Generator

Use Scenario: Interfacing 5V CAN transceiver status lines and switch inputs to a 3.3V MCU in harsh automotive environments.

IC Role / Device Role / Timing Role: Robust voltage-domain translator with latch-up immunity and wide temperature support (−40°C to +125°C).

Use Value: Guaranteed operation across full AEC-Q100 Grade 2 range; 0–7V input tolerance prevents damage during load dump events.

Use Scenario: Driving multiple DUT inputs simultaneously from a single FPGA pattern generator with precise timing alignment.

IC Role / Device Role / Timing Role: Skew-controlled fanout buffer ensuring <1.5ns inter-output skew for synchronized stimulus delivery.

Use Value: tOSLH ≤ 1.5ns (max) guarantees deterministic edge alignment across all four channels at 100MHz test frequencies.

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad 3-state buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
74LVC125PW,118 (Nexperia)	Lower V_CC min (1.65V), higher I_OL (24mA), no 5V tolerance without external clamping	Requires external diode clamps for 5V input use; better suited for pure 1.8V/3.3V systems	Select when operating below 2V or requiring higher drive strength in 3.3V-only designs
SN74LV125APW (TI)	Identical V_CC range and 5V tolerance; slightly higher t_PD (5.5ns typ); same TSSOP-14 footprint	Drop-in replacement with identical pinout and DC specs; minor AC timing variation acceptable in most systems	Choose for TI-design ecosystems or where dual-sourcing with identical functional behavior is prioritized

Compared with 74LVC125PW and SN74LV125APW, the 74LVX125TTR uniquely combines guaranteed 2V operation, true 5V input tolerance without external components, and lowest dynamic noise (VOLP = 0.3V), making it optimal for mixed-voltage industrial and portable applications demanding robustness and signal integrity.

Availability

74LVX125TTR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, portable medical sensor hubs, automotive body control modules, and test equipment digital pattern generators requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVX125TTR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing silicon solutions for automotive, industrial, power, and consumer markets.

The 74LVX series targets low-voltage, low-power, mixed-signal interfacing applications-specifically engineered for reliable 3.3V/5V domain bridging in battery-operated and noise-critical embedded systems.

FAQ

Can 74LVX125TTR operate with V_CC = 1.8V?

No. The recommended operating V_CC range is strictly 2.0V to 3.6V per datasheet Section 4. Below 2.0V, DC parameters including V_IL, V_IH, and output drive are not guaranteed, and functionality may fail. Data retention is specified down to 1.2V, but only for static storage-not active operation.

Is the 74LVX125TTR pinout identical to standard 74HC125 in TSSOP-14?

Yes. Pin numbering and function mapping (1G–4G, 1A–4A, 1Y–4Y, GND, V_CC) match JEDEC-standard 74-series 125 devices in TSSOP-14. This enables direct PCB-level replacement in existing designs without layout modification, provided V_CC and input voltage conditions align with LVX specifications.

What is the maximum capacitive load this device can drive reliably?

The datasheet specifies AC performance up to 50pF (CL) with defined t_PD, t_PZL, and skew limits. While outputs can physically drive >50pF, timing margins degrade beyond that point. For loads exceeding 50pF, derating curves in Section 4 indicate t_PD increases ~0.1ns/pF above 50pF-designers should verify setup/hold timing at target frequency and trace length.

Does the 74LVX125TTR require external pull-up or pull-down resistors on unused inputs?

No. Unused inputs may be left floating due to integrated input protection and internal biasing; however, STMicroelectronics recommends tying them to V_CC or GND for deterministic logic state and reduced noise coupling. Floating inputs increase susceptibility to EMI-induced glitches, especially in high-noise industrial environments.

74LVX125TTR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: 74LVX

Package/Case:: 14-TSSOP (0.173", 4.40mm Width)

Packaging:: Tape & Reel (TR)

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:: 4mA, 4mA

Voltage - Supply:: 2V ~ 3.6V

Operating Temperature:: -55°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-TSSOP

74LVX125TTR FAQ

1.How can I place an order for 74LVX125TTR through Aetrix?

Please submit a Request for Quotation (RFQ) for 74LVX125TTR 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 74LVX125TTR reliable?

The price and inventory of 74LVX125TTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVX125TTR is usually 5 days.

3.What payment methods are accepted for 74LVX125TTR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVX125TTR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74LVX125TTR?

74LVX125TTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74LVX125TTR 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 74LVX125TTR?

For technical support, including 74LVX125TTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVX125TTR requirements.

6.How does Aetrix verify that 74LVX125TTR is sourced from the original manufacturer or authorized distributors?

All 74LVX125TTR 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 74LVX125TTR meets industry standards.

7.What is the process for return or replacement of 74LVX125TTR?

All 74LVX125TTR units undergo pre-shipment inspection (PSI). If there is an issue with 74LVX125TTR, 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 74LVX125TTR part is unused and in its original packaging.

Return procedure for 74LVX125TTR:

1.Submit a request within 90 days.

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

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