SN74LVC8T245 (正在供货)

具有可配置电压转换和三态输出的 8 位双电源总线收发器

 

描述

This 8-bit noninverting bus transceiver uses two separate configurable power-supply rails. The SN74LVC8T245 is optimized to operate with VCCA and VCCB set at 1.65 V to 5.5 V. The A port is designed to track VCCA. VCCA accepts any supply voltage from 1.65 V to 5.5 V. The B port is designed to track VCCB. VCCB accepts any supply voltage from 1.65 V to 5.5 V. This allows for universal low-voltage bidirectional translation between any of the 1.8-V, 2.5-V, 3.3-V, and 5.5-V voltage nodes.

The SN74LVC8T245 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 SN74LVC8T245 is designed so that the control pins (DIR 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, all outputs are in the high-impedance state.

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

特性

  • Control Inputs VIH/VIL Levels Are Referenced to VCCA Voltage
  • VCC Isolation Feature – If Either VCC Input Is at GND, All Are in the High-Impedance State
  • Fully Configurable Dual-Rail Design Allows Each Port to Operate Over the Full 1.65-V to 5.5-V Power-Supply Range
  • Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
  • ESD Protection Exceeds JESD 22
    • 4000-V Human-Body Model (A114-A)
    • 100-V Machine Model (A115-A)
    • 1000-V Charged-Device Model (C101)

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参数 与其它产品相比 方向控制电压转换

 
Technology Family
Bits (#)
VCC (Min) (V)
VCC (Max) (V)
Voltage (Nom) (V)
F @ Nom Voltage (Max) (Mhz)
ICC @ Nom Voltage (Max) (mA)
Rating
Operating Temperature Range (C)
Pin/Package
SN74LVC8T245 SN74AVC8T245 SN74AVC8T245-Q1 SN74AVCH8T245 SN74LVC8T245-Q1 TXB0108 TXS0108E
LVC    AVC    AVC    AVC    LVC    TXB    TXS   
8    8    8    8    8    8    8   
1.65    1.2    1.2    1.2    1.65       
5.5    3.6    3.6    3.6    5.5       
1.8
2.5
3.3
5   
1.2
1.5
1.8
2.5
3.3   
1.2
1.5
1.8
2.5
3.3   
1.2
1.5
1.8
2.5
3.3   
1.8
2.5
3.3
5   
1.2
1.5
1.8
2.5
3.3
5   
1.8
2.5
3.3
5   
100    100    100    100    100    50    30   
0.025    0.25    0.025    0.016    0.04    0.01    0.008   
Catalog    Catalog    Automotive    Catalog    Automotive    Catalog    Catalog   
-40 to 85    -40 to 125    -40 to 125    -40 to 85    -40 to 125    -40 to 85    -40 to 85   
24SO
24SOIC
24SSOP
24SSOP
24TSSOP
24TVSOP
24VQFN   
24TSSOP
24TVSOP
24VQFN   
24TSSOP
24VQFN   
24TSSOP
24TVSOP
24VQFN   
24TSSOP    20BGA MICROSTAR JUNIOR
20DSBGA
20TSSOP
20USON
20VQFN   
20BGA MICROSTAR JUNIOR
20TSSOP
20VQFN   

其它合格版本 SN74LVC8T245

版本 器件型号 定义
增强型产品 SN74LVC8T245-EP 支持国防、航天和医疗应用
汽车电子 SN74LVC8T245-Q1 Q100 适用于追求零缺陷的高可靠性汽车电子应用的器件

WEBENCH® SN74LVC8T245

Tx:
Mid Channel:
Rx:
Max Data Rate: Gbps
Number of UI:
PRBS:
Eye Diagram