8-Bit Dual-Supply Bus Transceiver with Configurable Voltage Translation and Three-State Outputs - SN74LVC8T245

SN74LVC8T245 (ACTIVE)

8-Bit Dual-Supply Bus Transceiver with Configurable Voltage Translation and Three-State Outputs

Description

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.

For all available packages, see the orderable addendum at the end of the datasheet.

All trademarks are the property of their respective owners.

Description

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.

All trademarks are the property of their respective owners.

Features

  • 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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Parametrics Compare all products in Direction Controlled Voltage Translation

 
Technology Family
Bits (#)
VCC (Min) (V)
VCC (Max) (V)
Voltage (Nom) (V)
Static Current (mA)
F @ Nom Voltage (Max) (Mhz)
ICC @ Nom Voltage (Max) (mA)
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
SN74LVC8T245 SN74AVC8T245 SN74LVC8T245-Q1 TXB0108 TXS0108E
LVC     AVC     LVC        
8     8     8     8     8    
1.65     1.2     1.65        
5.5     3.6     5.5        
1.8
2.5
3.3
5    
1.2
1.5
1.8
2.5
3.3    
1.8
2.5
3.3
5    
   
      0.01     0.008    
100     100     100        
0.025     0.25     0.04        
Catalog     Catalog     Automotive     Catalog     Catalog    
-40 to 85     -40 to 85     -40 to 125     -40 to 85     -40 to 85    
24SO
24SOIC
24SSOP
24TSSOP
24TVSOP
24VQFN    
24TSSOP
24TVSOP
24VQFN    
24TSSOP     20BGA MICROSTAR JUNIOR
20DSBGA
20TSSOP
20USON
20VQFN    
20BGA MICROSTAR JUNIOR
20TSSOP
20VQFN    
0.46 | 1ku     0.55 | 1ku     0.52 | 1ku     0.80 | 1ku     0.80 | 1ku    

Other qualified versions of SN74LVC8T245

Version Part Number Definition
Enhanced Product SN74LVC8T245-EP Supports Defense, Aerospace and Medical Applications
Automotive SN74LVC8T245-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects
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