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 | 德州仪器 TI.com.cn

SN74AVC2T245
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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

 

描述

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.

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)

参数

与其它产品相比 方向控制电压转换 邮件 下载到电子表格中
Part number 立即下单 Technology Family Application Bits (#) High input voltage (Min) (Vih) High input voltage (Max) (Vih) Output voltage (Min) (V) Output voltage (Max) (V) IOH (Max) (mA) IOL (Max) (mA) Package Group Rating
SN74AVC2T245 立即下单 AVC     JTAG     2     0.78     3.6     1.2     3.6     -12     12     UQFN | 10     Catalog    
SN74AVC2T244 立即下单 AVC       2     0.81     3.6     0.9     3.6     -24     24     X2SON | 8
X2SON | 8    
Catalog    
SN74AVC2T45 立即下单 AVC     I2S     2     0.78     3.6     1.2     3.6     -12     12     DSBGA | 8
SM8 | 8
VSSOP | 8    
Catalog    
SN74AVC2T45-Q1 立即下单 AVC     GPIO
I2S    
2     0.78     3.6     1.2     3.6     -12     12     VSSOP | 8     Automotive    
SN74AVCH2T45 立即下单 AVC     GPIO
I2S    
2     0.8     3.6     1.2     3.6     -12     12     DSBGA | 8
SM8 | 8
VSSOP | 8    
Catalog    
SN74LVC2T45 立即下单 LVC     GPIO
I2S    
2     1.08     5.5     1.65     5.5     -32     32     DSBGA | 8
SM8 | 8
VSSOP | 8    
Catalog    
SN74LVC2T45-Q1 立即下单 LVC     GPIO
I2S    
2     1.08     5.5