Functional Description

• Quad Bus Buffer, Non-Inverted 3-State Outputs with Level Shifting

General

74LV4T125 is high speed CMOS quad 3-state bus buffer gate fabricated with silicon gate CMOS technology.

This product is able to allow level-up or level-down voltage translation with only one power supply.

The output level is referenced to the power supply voltage and is able to support 1.8-V, 2.5-V, 3.3-V, and 5.0-V

CMOS level. The input circuit is designed with a lower threshold. So level-up translation from 1.8 V to 3.3 V or

from 3.3 V to 5.0 V is possible.

All input terminals have an input protection circuit with no diode from input terminal to power supply side. All

output terminals have an output circuit with no parasitic diode from output terminal to power supply side. These

circuits realize an input tolerant function and output power-down protection, and ensure the voltage of input

terminals up to 5.5 V without regard to the supply voltage, and the voltage of output terminals up to 5.5 V even

if the output terminal is high impedance state or the power supply voltage is not applied. So level-down translation

from 3.3 V to 1.8 V or from 5.0 V to 3.3 V is possible.

The wide power supply voltage range of 1.65 V to 5.5 V allows the generation of desired output level to connect

to controllers or processors and prevents device destruction due to mismatched supply voltage and input voltage.

Features

(1) Wide operating voltage range: VCC = 1.65 V to 5.5 V

(2) Level-up voltage translation

1.2 V to 1.8 V → 1.8 V (VCC = 1.8 V)

1.5 V to 2.5 V → 2.5 V (VCC = 2.5 V)

1.8 V to 3.3 V → 3.3 V (VCC = 3.3 V)

2.5 V to 5.0 V → 5.0 V (VCC = 5.0 V)

(3) Level-down voltage translation

5.0 V to 1.8 V → 1.8 V (VCC = 1.8 V)

5.0 V to 2.5 V → 2.5 V (VCC = 2.5 V)

5.0 V to 3.3 V → 3.3 V (VCC = 3.3 V)

(4) Low power dissipation: ICC = 4.0 μA (max) at Ta = 25 

(5) Wide operating temperature range: Topr = -40 to 125 

(6) 5.5 V tolerant is provided on all inputs, power down protection is provided on all outputs.

(7) Low noise: VOLP = 0.8 V (max)