SN74AVCH4T245是TI公司的一款方向控制电压转换产品，SN74AVCH4T245是具有可配置电压转换和 3 态输出的 4 位双电源总线收发器，本页介绍了SN74AVCH4T245的产品说明、应用、特性等，并给出了与SN74AVCH4T245相关的TI元器件型号供参考。
SN74AVCH4T245 - 具有可配置电压转换和 3 态输出的 4 位双电源总线收发器 - 方向控制电压转换 - 电压电平转换 - TI公司（Texas Instruments，德州仪器）
- 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
- Bus Hold on Data Inputs Eliminates the Need for External pull-up/pull-down Resistors
- Max Data Rates
- 380 Mbps (1.8 V to 3.3 V Translation)
- 200 Mbps (<1.8 V to 3.3 V Translation)
- 200 Mbps (Translate to 2.5 V or 1.8 V)
- 150 Mbps (Translate to 1.5 V)
- 100 Mbps (Translate to 1.2 V)
- Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
- ESD Protection Exceeds JESD 22
- 8000 V Human Body Model (A114-A)
- 200 V Machine Model (A115-A)
- 1000 V Charged-Device Model (C101)
- Personal Electronics
- Industrial
- Enterprise
- Telecom
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 1.2 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. The SN74AVCH4T245 is optimized to operate with VCCA/VCCB set at 1.4 V to 3.6 V. It is operational with VCCA/VCCB as low as 1.2 V. 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 SN74AVCH4T245 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 SN74AVCH4T245 device control pins (1DIR, 2DIR, 1OE, and 2OE) 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.
| PART NUMBER | PACKAGE | BODY SIZE (NOM) |
|---|---|---|
| SN74AVCH4T245 | UQFN (16) | 1.80 mm × 2.60 mm |
| VQFN (16) | 3.50 mm × 4.00 mm | |
| TVSOP (16) | 4.40 mm × 3.60 mm | |
| TSSOP (16) | 4.40 mm × 5.00 mm | |
| SOIC (16) | 3.91 mm × 9.90 mm |
