SN74AVC4T245DR集成电路（IC）的缓冲器驱动器接收器收发器规格书PDF中文资料

SN74AVC4T245DR属于集成电路（IC）的缓冲器驱动器接收器收发器。由美国德州仪器公司制造生产的SN74AVC4T245DR缓冲器，驱动器，接收器，收发器逻辑缓冲器、驱动器、接收器和收发器允许隔离对某个电路的逻辑信号的访问，以用于另一电路。缓冲器将其输入信号（不变或反相）传递到其输出，并可能用于清除弱信号或驱动负载。在布尔逻辑仿真器中，缓冲器主要用于增加传播延迟。逻辑接收器和收发器允许在数据总线之间进行隔离通信。

1 Features

• Control inputs VIH/VIL levels are referenced to

VCCA voltage

• Fully configurable dual-rail design allows each port

to operate over the full 1.2V to 3.6V power-supply

range

• I/Os Are 4.6V tolerant

• Ioff supports partial power-down-mode operation

• Maximum data rates:

– 380Mbps (1.8V to 3.3V translation)

– 200Mbps (< 1.8V to 3.3V translation)

– 200Mbps (translate to 2.5V or 1.8V)

– 150Mbps (translate to 1.5V)

– 100Mbps (translate to 1.2V)

• Latch-up performance exceeds 100mA per JESD

78, Class II

• ESD protection exceeds JESD 22:

– 8000V Human-Body Model (A114-A)

– 150V Machine Model (A115-A)

– 1000V Charged-Device Model (C101)

2 Applications

• Personal electronics

• Industrial

• Enterprise

• Telecom

3 Description

This 4-bit noninverting bus transceiver uses two

separate configurable power-supply rails. The A port

is designed to track VCCA. VCCA accepts any supply

voltage from 1.2V to 3.6V. The B port is designed to

track VCCB. VCCB accepts any supply voltage from

1.2V to 3.6V. The SN74AVC4T245 is optimized

to operate with VCCA/VCCB set at 1.4V to 3.6V.

It is operational with VCCA/VCCB as low as 1.2V.

This allows for universal low-voltage bidirectional

translation between any of the 1.2V, 1.5V, 1.8V, 2.5V,

and 3.3V voltage nodes.

The SN74AVC4T245 device is designed for

asynchronous communication between two data

buses. The logic levels of the direction-control (DIR)

input and the output-enable (OE) input activate either

the B-port outputs or the A-port outputs or place

both output ports into the high-impedance mode. 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

is always active and must have a logic HIGH or LOW

level applied to prevent excess ICC and ICCZ.

The SN74AVC4T245 device is designed so that VCCA

supplies the control pins (1DIR, 2DIR, 1 OE, and 2

OE).

This device is fully specified for partial-power-down

applications using Ioff. The Ioff circuitry disables

the outputs, preventing damaging current backflow

through the device when it is powered down.

The VCC isolation feature is designed so that if either

VCC input is at GND, then both ports are in the highimpedance

state.

To put the device in the high-impedance state during

power up or power down, tie OE to VCC through a

pullup resistor; the current-sinking capability of the

driver determines the minimum value of the resistor.