SN74AVCH2T45DCUR
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Texas Instruments SN74AVCH2T45DCUR

Manufacturer No:
SN74AVCH2T45DCUR
Manufacturer:
Texas Instruments
Package:
Tape & Reel (TR)
Description:
IC TRNSLTR BIDIRECTIONAL US8
Delivery:
Payment:
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Product Introduction

Overview

The SN74AVCH2T45DCUR is a dual-bit, dual-supply bus transceiver manufactured by Texas Instruments. This device is designed for asynchronous communication between two data buses and supports universal low-voltage bidirectional translation and level-shifting. The A ports track VCCA and accept supply voltages from 1.2V to 3.6V, while the B ports track VCCB and also accept supply voltages from 1.2V to 3.6V. This allows for level-shifting between various voltage nodes such as 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V. The device features active bus-hold circuitry, VCC isolation, and partial power-down mode operation, making it suitable for a wide range of applications requiring voltage translation and data transmission between different voltage domains.

Key Specifications

Parameter Value Unit
Package VSSOP (DCU)
Pins 8
Operating Temperature Range -40 to 85 °C
Supply Voltage (VCCA and VCCB) 1.2 to 3.6 V
High-Level Input Voltage (Data Inputs) 0.65 * VCCI to VCCI V
Low-Level Input Voltage (Data Inputs) 0.35 * VCCI to 0.8 V
Maximum Data Rates 500 Mbps (1.8V to 3.3V), 320 Mbps (< 1.8V to 3.3V), 280 Mbps (Level-Shifting to 1.5V), 240 Mbps (Level-Shifting to 1.2V) Mbps
Junction-to-Ambient Thermal Resistance (RθJA) 246.9 °C/W

Key Features

  • Available in the Texas Instruments NanoFree™ Package
  • VCC Isolation: Ensures outputs are in high-impedance state if either VCC input is at GND
  • 2-Rail Design: Supports separate configurable power-supply rails for A and B ports
  • I/Os are 4.6V Tolerant
  • Partial Power-Down-Mode Operation: Prevents damaging current backflow when powered down
  • Active Bus-Hold Circuitry: Holds unused or un-driven inputs at a valid logic state
  • Maximum Data Rates: Up to 500 Mbps depending on voltage levels
  • ESD Protection: Exceeds JESD 22 standards
  • Latch-Up Performance: Exceeds 100mA per JESD 78, Class II

Applications

The SN74AVCH2T45DCUR is suitable for various applications requiring voltage translation and level-shifting between different voltage domains. These include:

  • Asynchronous communication between two data buses
  • Universal low-voltage bidirectional translation
  • Level-shifting between 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V voltage nodes
  • Partial power-down mode applications
  • Systems requiring active bus-hold circuitry to maintain valid logic states on unused inputs

Q & A

  1. What is the primary function of the SN74AVCH2T45DCUR?

    The primary function is to act as a dual-bit, dual-supply bus transceiver for asynchronous communication between two data buses, supporting universal low-voltage bidirectional translation and level-shifting.

  2. What are the acceptable supply voltage ranges for VCCA and VCCB?

    The supply voltage ranges for both VCCA and VCCB are from 1.2V to 3.6V.

  3. What is the maximum data rate supported by the SN74AVCH2T45DCUR?

    The maximum data rate is up to 500 Mbps, depending on the voltage levels used.

  4. What is the purpose of the active bus-hold circuitry?

    The active bus-hold circuitry holds unused or un-driven inputs at a valid logic state.

  5. Does the SN74AVCH2T45DCUR support partial power-down mode operation?
  6. What is the significance of VCC isolation in the SN74AVCH2T45DCUR?

    VCC isolation ensures that if either VCC input is at GND, both outputs are in the high-impedance state.

  7. What are the thermal resistance values for the VSSOP (DCU) package?

    The junction-to-ambient thermal resistance (RθJA) is 246.9 °C/W.

  8. Is the SN74AVCH2T45DCUR ESD protected?
  9. What is the latch-up performance of the SN74AVCH2T45DCUR?
  10. In what package types is the SN74AVCH2T45 available?

Product Attributes

Translator Type:Voltage Level
Channel Type:Bidirectional
Number of Circuits:1
Channels per Circuit:2
Voltage - VCCA:1.2 V ~ 3.6 V
Voltage - VCCB:1.2 V ~ 3.6 V
Input Signal:- 
Output Signal:- 
Output Type:Tri-State, Non-Inverted
Data Rate:500Mbps
Operating Temperature:-40°C ~ 85°C (TA)
Features:- 
Mounting Type:Surface Mount
Package / Case:8-VFSOP (0.091", 2.30mm Width)
Supplier Device Package:8-VSSOP
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Similar Products

Part Number SN74AVCH2T45DCUR SN74AVCH2T45DCUT SN74AVC2T45DCUR SN74AVCH2T45DCTR
Manufacturer Texas Instruments Texas Instruments Texas Instruments Texas Instruments
Product Status Active Active Active Active
Translator Type Voltage Level Voltage Level Voltage Level Voltage Level
Channel Type Bidirectional Bidirectional Bidirectional Bidirectional
Number of Circuits 1 1 1 1
Channels per Circuit 2 2 2 2
Voltage - VCCA 1.2 V ~ 3.6 V 1.2 V ~ 3.6 V 1.2 V ~ 3.6 V 1.2 V ~ 3.6 V
Voltage - VCCB 1.2 V ~ 3.6 V 1.2 V ~ 3.6 V 1.2 V ~ 3.6 V 1.2 V ~ 3.6 V
Input Signal - - - -
Output Signal - - - -
Output Type Tri-State, Non-Inverted Tri-State, Non-Inverted Tri-State, Non-Inverted Tri-State, Non-Inverted
Data Rate 500Mbps 500Mbps 500Mbps 500Mbps
Operating Temperature -40°C ~ 85°C (TA) -40°C ~ 85°C (TA) -40°C ~ 85°C (TA) -40°C ~ 85°C (TA)
Features - - - -
Mounting Type Surface Mount Surface Mount Surface Mount Surface Mount
Package / Case 8-VFSOP (0.091", 2.30mm Width) 8-VFSOP (0.091", 2.30mm Width) 8-VFSOP (0.091", 2.30mm Width) 8-LSSOP, 8-MSOP (0.110", 2.80mm Width)
Supplier Device Package 8-VSSOP 8-VSSOP 8-VSSOP SM8

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