8-Bit Dual-Supply Bus Transceiver with Configurable Voltage-Level Shifting and 3-State Outputs - SN74AVC8T245

SN74AVC8T245 (ACTIVE)

8-Bit Dual-Supply Bus Transceiver with Configurable Voltage-Level Shifting and 3-State Outputs

 

Description

This 8-bit noninverting bus transceiver uses two separate configurable power-supply rails. The SN74AVC8T245 is optimized to operate with VCCA/VCCB set at 1.4 V to 3.6 V. The device is operational with VCCA/VCCB as low as 1.2 V. 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 SN74AVC8T245 is designed for asynchronous communication between data buses. The device transmits data from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the direction-control (DIR) input. The output-enable (OE) input can be used to disable the outputs so the buses are effectively isolated.

The SN74AVC8T245 is designed so that the control pins (DIR and OE) are supplied by VCCA.

The SN74AVC8T245 solution is compatible with a single-supply system and can be replaced later with a ’245 function, with minimal printed circuit board redesign.

This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, thus 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 shall be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

Features

  • 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)
  • Control Inputs VIH/VIL Levels Are Referenced to VCCA Voltage
  • VCC Isolation Feature – If Either VCC Input Is at GND, All I/O Ports Are in the High-Impedance State
  • Ioff Supports Partial Power-Down Mode Operation
  • Fully Configurable Dual-Rail Design Allows Each Port to Operate Over the Full 1.4-V to 3.6-V Power-Supply Range
  • I/Os Are 4.6-V Tolerant
  • Maximum Data Rates
    • 170 Mbps (VCCA  < 1.8 V or VCCB  < 1.8 V)
    • 320 Mbps (VCCA  ≥ 1.8 V and VCCB  ≥ 1.8 V)

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Parametrics Compare all products in Direction Controlled Voltage Translation

 
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
SN74AVC8T245 SN74AVC8T245-Q1 SN74AVCH8T245 SN74LVC8T245 TXB0108 TXS0108E
AVC    AVC    AVC    LVC    TXB    TXS   
8    8    8    8    8    8   
1.2    1.2    1.2    1.65       
3.6    3.6    3.6    5.5       
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    50    30   
0.25    0.025    0.016    0.025    0.01    0.008   
Catalog    Automotive    Catalog    Catalog    Catalog    Catalog   
-40 to 125    -40 to 125    -40 to 85    -40 to 85    -40 to 85    -40 to 85   
24TSSOP
24TVSOP
24VQFN   
24TSSOP
24VQFN   
24TSSOP
24TVSOP
24VQFN   
24SO
24SOIC
24SSOP
24SSOP
24TSSOP
24TVSOP
24VQFN   
20BGA MICROSTAR JUNIOR
20DSBGA
20TSSOP
20USON
20VQFN   
20BGA MICROSTAR JUNIOR
20TSSOP
20VQFN   

Other qualified versions of SN74AVC8T245

Version Part Number Definition
Automotive SN74AVC8T245-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects