SN74LV4T125PWR datasheet(10/25 Pages) TI1

номер детали	SN74LV4T125PWR

подробное описание детали	Single Power Supply Quadruple Buffer Translator GATE With 3-State Output CMOS Logic Level Shifter

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SN74LV4T125

SCLS749B – FEBRUARY 2014 – REVISED SEPTEMBER 2014

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9 Detailed Description

9.1 Overview

The SN74LVxTxx family was created to allow up- or down-voltage translation with only one power rail. The family

has over-voltage tolerant inputs that allow down translation from up to 5.5 V to the VCC level that can be as low

as 1.8 V. The family SN74LVxTxx also has a lowered switching threshold that allows it to translate up to the VCC

level that can be as high as 5.5 V.

9.1.1 Translating Down

Using these parts to translate down is very simple. Because the inputs are tolerant to 5.5 V at any valid VCC, they

can be used to down translate. The input can be any level above VCC up to 5.5 V and the output will equal the

VCC level, which can be as low as 1.8 V. One important advantage to down translating using this part is that the

ICC current will remain less than or equal to the specified value.

Down translation possibilities with SN74LVxTxx:

•

With 1.8-V VCC from 2.5 V, 3.3 V, or 5 V down to 1.8 V.

•

With 2.5-V VCC from 3.3 V or 5 V down to 2.5 V.

•

With 3.3-V VCC from 5 V down to 3.3 V.

9.1.2 Translating Up

Using the SN74LVxTxx family to translate up is very simple. The input switching threshold is lowered so the high

level of the input voltage can be much lower than a typical CMOS VIH. For instance, If the VCC is 3.3 V then the

typical CMOS switching threshold would be VCC / 2 or 1.65 V. This means the input high level must be at least

VCC × 0.7 or 2.31 V. On the LVxT devices the input threshold for 3.3-V VCC is approximately 1 V. This allows a

signal with a 1.8-V VIH to be translated up to the VCC level of 3.3 V.

Up translation possibilities with SN74LVxTxx:

•

With 2.5-V VCC from 1.8 V to 2.5 V.

•

With 3.3-V VCC from 1.8 V or 2.5 V to 3.3 V.

•

With 5-V VCC From 2.5 V or 3.3 V to 5 V.

9.2 Functional Block Diagram

10

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Аналогичный номер детали - SN74LV4T125PWR

производитель	номер детали	датащи	подробное описание детали
Texas Instruments	SN74LV4T125PWREP	1Mb / 23P	[Old version datasheet] SN74LV4T125-EP Single Power Supply Quadruple Buffer Translator GATE With 3- State Output CMOS Logic Level Shifter JANUARY 2024
Texas Instruments	SN74LV4T125PWREP	1Mb / 23P	[Old version datasheet] SN74LV4T125-EP Single Power Supply Quadruple Buffer Translator GATE With 3- State Output CMOS Logic Level Shifter JANUARY 2024

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Аналогичное описание - SN74LV4T125PWR

производитель	номер детали	датащи	подробное описание детали
Texas Instruments	SN54SC4T125-SEP	918Kb / 18P	[Old version datasheet] SN54SC4T125-SEP Radiation Tolerant, Single Power Supply Quadruple Buffer Translator GATE With 3-State Output CMOS Logic Level Shifter NOVEMBER 2023
	SN54SC4T125-SEP	1,011Kb / 23P	[Old version datasheet] SN54SC4T125-SEP Radiation Tolerant, Single Power Supply Quadruple Buffer Translator GATE With 3-State Output CMOS Logic Level Shifter NOVEMBER 2023
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