SCES576H June   2004  – March 2024 SN74AVC4T245

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1  Absolute Maximum Ratings
    2. 5.2  ESD Ratings
    3. 5.3  Recommended Operating Conditions
    4. 5.4  Thermal Information
    5. 5.5  Electrical Characteristics
    6. 5.6  Operating Characteristics
    7. 5.7  Switching Characteristics: VCCA = 1.2V
    8. 5.8  Switching Characteristics: VCCA = 1.5V ± 0.1V
    9. 5.9  Switching Characteristics: VCCA = 1.8V ± 0.15V
    10. 5.10 Switching Characteristics: VCCA = 2.5V ± 0.2V
    11. 5.11 Switching Characteristics: VCCA = 3.3V ± 0.3V
    12. 5.12 Typical Characteristics
  7. 6 Parameter Measurement Information
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Fully Configurable Dual-Rail Design
      2. 7.3.2 Supports High Speed Translation
      3. 7.3.3 Ioff Supports Partial-Power-Down Mode Operation
    4. 7.4 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Receiving Notification of Documentation Updates
    2. 9.2 Support Resources
    3. 9.3 Trademarks
    4. 9.4 Electrostatic Discharge Caution
    5. 9.5 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • BQB|16
  • PW|16
  • DYY|16
  • RGY|16
  • D|16
  • DGV|16
  • RSV|16
Thermal pad, mechanical data (Package|Pins)
Orderable Information

3 Description

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 1.2V to 3.6V. The B port is designed to track VCCB. VCCB accepts any supply voltage from
1.2V to 3.6V. The SN74AVC4T245 is optimized to operate with VCCA/VCCB set at 1.4V to 3.6V. It is operational with VCCA/VCCB as low as 1.2V. 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 SN74AVC4T245 device 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 SN74AVC4T245 device is designed so that VCCA supplies the control pins (1DIR, 2DIR, 1 OE, and 2 OE).

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 is designed so that if either VCC input is at GND, then both ports are in the high-impedance state.

To put the device in the high-impedance state during power up or power down, tie OE to VCC through a pullup resistor; the current-sinking capability of the driver determines the minimum value of the resistor.

Package Information
PART NUMBER PACKAGE(1) PACKAGE SIZE(2)
SN74AVC4T245 D (SOIC, 16) 9.9mm × 6mm
DGV (TVSOP, 16) 3.6mm × 6.4mm
PW (TSSOP, 16) 5mm × 6.4mm
RGY (WQFN, 16) 4mm × 3.5mm
RSV (UQFN, 16) 2.6mm × 1.8mm
BQB (WQFN, 16) 3.5mm × 2.5mm
DYY (SOT, 16) 4.2mm × 2mm
(1) For more information, see Section 11.
(2) The package size (length × width) is a nominal value and includes pins, where applicable.
GUID-CFB84144-D29B-478D-B45A-E87822507615-low.gif Logic Diagram (Positive Logic) for 1/2 of SN74AVC4T245