SN74AVC2T245 - 具有可配置电压转换和三态输出的双位 2-DIR 引脚双电源总线收发器

SN74AVC2T245是TI德州仪器公司的一款无产品，SN74AVC2T245是具有可配置电压转换和三态输出的双位 2-DIR 引脚双电源总线收发器，本站介绍了SN74AVC2T245的封装应用图解、特点和优点、功能等，并给出了与SN74AVC2T245相关的TI元器件型号供参考。

SN74AVC2T245 - 具有可配置电压转换和三态输出的双位 2-DIR 引脚双电源总线收发器 - 无 - 小尺寸逻辑器件 - 德州仪器

产品特性

Each Channel Has Independent Direction Control
Control Inputs VIH/VIL Levels Are Referenced to VCCA Voltage
Fully Configurable Dual-Rail Design Allows Each Port to Operate Over the Full 1.2 V to 3.6 V Power-Supply Range
I/Os Are 4.6 V Tolerant
Ioff Supports Partial-Power-Down Mode Operation
VCC Isolation Feature - If Either VCC Input is at GND, Both Ports are in High-Impedance State
Typical Data Rates
- 500 Mbps (1.8 V to 3.3 V Level-Shifting)
- 320 Mbps (<1.8 V to 3.3 V Level-Shifting)
- 320 Mbps (Translate to 2.5 V or 1.8 V)
- 280 Mbps (Translate to 1.5 V)
- 240 Mbps (Translate to 1.2 V)
Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
ESD Protection Exceeds JESD 22
- 5000 V Human-Body Model (A114-A)
- 200 V Machine Model (A115-A)
- 1500 V Charged-Device Model (C101)

产品应用

Personal Electronics
Industrial
Enterprise
Telecom

Logic Diagram (Positive Logic)

1. Shown for a single channel

产品说明

This dual-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 1.2 V to 3.6 V. The B port is designed to track VCCB. VCCB accepts any supply voltage from 1.2 V to 3.6 V. This allows for universal low-voltage bidirectional translation between any of the 1.2 V, 1.5 V, 1.8 V, 2.5 V, and 3.3 V voltage nodes.

The SN74AVC2T245 is designed for asynchronous communication between two data buses. The logic levels of the direction-control (DIR) input and the output-enable (OE) 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 always is active and must have a logic HIGH or LOW level applied to prevent excess ICC and ICCZ.

The SN74AVC2T245 control pins (DIR1, DIR2, and OE) are supplied by VCCA.

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 ensures that if either VCC input is at GND, both ports are in the high-impedance state.

To ensure the high-impedance state during power up or power down, OE must be connected to VCC through a pull-up resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
SN74AVC2T245	UQFN (10)	1.80 mm × 1.40 mm

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