SN74AVC2T45DCTR集成电路（IC）的转换器电平移位器规格书PDF中文资料

SN74AVC2T45DCTR属于集成电路（IC）的转换器电平移位器。由德州仪器制造生产的SN74AVC2T45DCTR转换器，电平移位器逻辑转换器或电平移位器 IC 可用于在数字逻辑设备之间传递信息，这些设备可在不同/不兼容的供电电压下工作，或可实现不同的信令方式。例如，可以将需要 5 V 电源的数字输出传感器连接到具有 3.3 V I/O 电源的 FPGA，或者在 CMOS 或 TTL 等单端信令方式与 PECL 或 LVDS 等差分技术之间进行转换。

1 Features

• Available in the Texas Instruments NanoFree™

Package

• VCC Isolation Feature: If Either VCC Input Is at

GND, Both Ports Are in the High-Impedance State

• Dual Supply Rail Design

• I/Os Are 4.6V Over Voltage Tolerant

• Ioff Supports Partial-Power-Down Mode Operation

• Max Data Rates

– 500Mbps (1.8V to 3.3V)

– 320Mbps (<1.8V to 3.3V )

– 320Mbps (Level-Shifting to 2.5V or 1.8V)

– 280Mbps (Level-Shifting to 1.5V)

– 240Mbps (Level-Shifting to 1.2V)

• Latch-Up Performance Exceeds 100mA Per JESD

78, Class II

• ESD Protection Exceeds JESD 22

2 Applications

• Smartphones

• Servers

• Desktop PCs and notebooks

• Other portable devices

3 Description

This 2-bit non-inverting bus transceiver uses two

separate configurable power-supply rails. The A ports

are designed to track VCCA and accepts any supply

voltage from 1.2V to 3.6V. The B ports are designed

to track VCCB and accepts any supply voltage from

1.2V to 3.6V. This allows for universal low-voltage

bidirectional translation and level-shifting between any

of the 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V voltage nodes.

The SN74AVC2T45 is designed for asynchronous

communication between two data buses. The logic

levels of the direction-control (DIR pin) input activate

either the B-port outputs or the A-port outputs. The

device transmits data from the A bus to the B bus

when the B-port outputs are activated and from the

B bus to the A bus when the A-port outputs are

activated. The input circuitry on both A and B ports

always is active and must have a logic HIGH or LOW

level applied to prevent excess leakage current on the

internal CMOS structure.