SN74LXC1T45-Q1中文资料德州仪器数据手册PDF规格书

1 Features

• Fully configurable dual-rail design allows each port

to operate from 1.1 V to 5.5 V

• Robust, glitch-free power supply sequencing

• Up to 420-Mbps support for 3.3 V to 5.0 V

• Schmitt-trigger inputs allow for slow or noisy inputs

• I/O's with integrated dynamic pull-down resistors

help reduce external component count

• Control inputs with integrated static pull-down

resistors allow for floating control inputs

• High drive strength (up to 32 mA at 5 V)

• Low power consumption

– 3-μA maximum (25°C)

– 6-μA maximum (–40°C to 125°C)

• VCC isolation and Vcc disconnect (Ioff-float) feature

– If either VCC supply is < 100 mV or

disconnected, all I/O's get pulled-down and

then become high-impedance

• Ioff supports partial-power-down mode operation

• Compatible with LVC family level shifters

• Control logic (DIR and OE) are referenced to VCCA

• Operating temperature from –40°C to +125°C

• Latch-up performance exceeds 100 mA per JESD

78, class II

• ESD protection exceeds JESD 22

– 4000-V human-body model

– 1000-V charged-device model

2 Applications

• Eliminate slow or noisy input signals

• Driving indicator LEDs or buzzers

• Debouncing a mechanical switch

• General purpose I/O level shifting

3 Description

The SN74LXC1T45-Q1 is a 1-bit, dual-supply

noninverting bidirectional voltage level translation

device. The I/O pin A and control pin (DIR) are

referenced to VCCA logic levels, and the I/O pin B are

referenced to VCCB logic levels. The A pin is able to

accept I/O voltages ranging from 1.1 V to 5.5 V, while

the B pin can accept I/O voltages from 1.1 V to 5.5 V.

A high on DIR allows data transmission from A to B

and a low on DIR allows data transmission from B to

A. See Device Functional Modes for a summary of the

operation of the control logic.