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74LVX125MX

Quad 3-state bus buffer, 2V-3.6V, 5V-tolerant inputs, 4.4ns tpd, SOIC-14

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Manufacturer Part：

74LVX125MX

Package：

SOIC-14 (8.75 x 4.0 x 1.5 mm)

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Description

Product Overview

The 74LVX125MX from onsemi (formerly Fairchild) is a low-voltage quad bus buffer with 3-state outputs in a 14-pin SOIC package. Operating from 2V to 3.6V with 5V-tolerant inputs, it provides four non-inverting buffer channels with independent output enables, ideal for interfacing 5V and 3V logic systems.

Key Specifications

Supply Voltage Range 2V to 3.6V
5V Tolerant Inputs Yes
Max Propagation Delay (3.3V) 9.7 ns
Max Supply Current 4 µA
Output Drive ±4 mA
Number of Channels 4
Operating Temperature -40°C to +85°C
Package SOIC-14

Features

  • High speed: tPD = 4.4 ns (typ) at 3.3V
  • Low power dissipation: 4µA max ICC
  • 5V-tolerant inputs for mixed-voltage interfacing
  • Power-down protection on inputs
  • Balanced propagation delays
  • Low noise: VOLP = 0.5V max
  • Pin and function compatible with standard 74HC125
  • Latch-up performance exceeds 300mA

Applications

  • Mixed 3V/5V system interfacing
  • Bus buffering in multi-voltage designs
  • Memory address/data bus isolation
  • Level translation in portable equipment
  • Glue logic in battery-powered systems

The 74LVX125MX is an advanced high-speed CMOS quad bus buffer with 3-state outputs from onsemi. It features four independent non-inverting buffer channels, each with its own output enable (active-high to disable). The inputs tolerate voltages up to 7V, allowing direct interfacing of 5V systems to 3V systems. With a typical propagation delay of 4.4 ns at 3.3V and a maximum quiescent current of just 4 µA, it is well-suited for mixed-voltage, low-power designs.

The 74LVX125MX comprises four identical non-inverting buffer channels with independent 3-state output control: (1) Input Stage: Each channel features a 5V-tolerant input that can accept signals above the supply voltage, enabling safe interface with higher-voltage logic families. Power-down protection circuitry prevents damaging current flow when the device is unpowered. (2) Buffer Stage: The LVX CMOS technology provides fast propagation (4.4ns typical at 3.3V) while maintaining low static power (4µA max). (3) Output Stage: Each channel has an independent active-high output enable. When the OE pin is HIGH, the output enters a high-impedance state, disconnecting it from the bus.

Pin Name Type Description
1 1OE Input Channel 1 output enable (active-high disables)
2 1A Input Channel 1 data input
3 2A Input Channel 2 data input
4 2OE Input Channel 2 output enable
5 3OE Input Channel 3 output enable
6 3A Input Channel 3 data input
7 GND Ground Ground
8 4Y Output Channel 4 data output (3-state)
9 4OE Input Channel 4 output enable
10 3Y Output Channel 3 data output
11 4A Input Channel 4 data input
12 2Y Output Channel 2 data output
13 1Y Output Channel 1 data output
14 VCC Power Supply voltage (2V to 3.6V)
  • Interfacing 5V microcontrollers with 3.3V peripherals
  • Bus isolation and buffering in multi-voltage systems
  • Memory address/data bus drivers with 3-state capability
  • Level translation in portable and battery-powered equipment
  • Glue logic for mixed-signal board designs
Model Manufacturer Supply Package Notes
74HC125MX onsemi 2-6V SOIC-14 Wider voltage range
74LVX125MTCX onsemi 2-3.6V TSSOP-14 Smaller package
74LVC125AD Nexperia 1.65-3.6V SOIC-14 Broader low-voltage range
SN74LV125ADBR TI 2-5.5V SOIC-14 Wider supply range
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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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