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SN74LVC8T245-Q1

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Bus-Transceiver für die Automobilindustrie, 8 Bit, Doppelversorgung, mit Spannungsumsetzung und Tri-

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SN74LVC8T245-Q1

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Produktdetails

Technology family LVC Applications GPIO Bits (#) 8 High input voltage (min) (V) 1.08 High input voltage (max) (V) 5.5 Vout (min) (V) 1.65 Vout (max) (V) 5.5 Data rate (max) (Mbps) 200 IOH (max) (mA) -32 IOL (max) (mA) 32 Supply current (max) (µA) 25 Features Output enable, Overvoltage tolerant inputs, Partial power down (Ioff) Input type Standard CMOS Output type 3-State, Balanced CMOS, Push-Pull Rating Automotive Operating temperature range (°C) -40 to 125
Technology family LVC Applications GPIO Bits (#) 8 High input voltage (min) (V) 1.08 High input voltage (max) (V) 5.5 Vout (min) (V) 1.65 Vout (max) (V) 5.5 Data rate (max) (Mbps) 200 IOH (max) (mA) -32 IOL (max) (mA) 32 Supply current (max) (µA) 25 Features Output enable, Overvoltage tolerant inputs, Partial power down (Ioff) Input type Standard CMOS Output type 3-State, Balanced CMOS, Push-Pull Rating Automotive Operating temperature range (°C) -40 to 125
TSSOP (PW) 24 49.92 mm² 7.8 x 6.4
  • Control inputs V IH/V IL levels are referenced to V CCA voltage
  • V CC isolation feature – if either V CC 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)
  • Control inputs V IH/V IL levels are referenced to V CCA voltage
  • V CC isolation feature – if either V CC 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)

The SN74LVC8T245-Q1 is an eight bit non-inverting bus transceiver with configurable dual power supply rails that enables bidirectional voltage level translation. The SN74LVC8T245-Q1 is optimized to operate with V CCA and V CCB set at 1.65 V to 5.5 V. The A port is designed to track V CCA. V CCA accepts any supply voltage from 1.65 V to 5.5 V. The B port is designed to track V CCB. V CCB 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-Q1 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 I CC and I CCZ.

This device is fully specified for partial-power-down applications using I off. The I off circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down. The V CC isolation feature ensures that if either V CC 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 V CC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

The SN74LVC8T245-Q1 is designed so that the control pins (DIR and OE) are supplied by V CCA.

The SN74LVC8T245-Q1 is an eight bit non-inverting bus transceiver with configurable dual power supply rails that enables bidirectional voltage level translation. The SN74LVC8T245-Q1 is optimized to operate with V CCA and V CCB set at 1.65 V to 5.5 V. The A port is designed to track V CCA. V CCA accepts any supply voltage from 1.65 V to 5.5 V. The B port is designed to track V CCB. V CCB 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-Q1 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 I CC and I CCZ.

This device is fully specified for partial-power-down applications using I off. The I off circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down. The V CC isolation feature ensures that if either V CC 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 V CC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

The SN74LVC8T245-Q1 is designed so that the control pins (DIR and OE) are supplied by V CCA.
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Typ Titel Datum
* Data sheet SN74LVC8T245-Q1 Automotive 8-Bit Dual-Supply Bus Transceiver With Configurable Voltage Translation and 3-State Outputs datasheet (Rev. A) PDF | HTML 14 Dez 2022
Application note Schematic Checklist - A Guide to Designing With Fixed or Direction Control Translators PDF | HTML 02 Okt 2024
Application note Schematic Checklist - A Guide to Designing with Auto-Bidirectional Translators PDF | HTML 12 Jul 2024
Application note Understanding Transient Drive Strength vs. DC Drive Strength in Level-Shifters (Rev. A) PDF | HTML 03 Jul 2024
EVM User's guide TXV010xEVM Evaluation Module User's Guide PDF | HTML 05 Feb 2024
Application note Implications of Slow or Floating CMOS Inputs (Rev. E) 26 Jul 2021
Selection guide Voltage Translation Buying Guide (Rev. A) 15 Apr 2021
Selection guide Little Logic Guide 2018 (Rev. G) 06 Jul 2018
Selection guide Logic Guide (Rev. AB) 12 Jun 2017
Application note How to Select Little Logic (Rev. A) 26 Jul 2016
Application note Understanding and Interpreting Standard-Logic Data Sheets (Rev. C) 02 Dez 2015
More literature Automotive Logic Devices Brochure 27 Aug 2014
User guide LOGIC Pocket Data Book (Rev. B) 16 Jan 2007
Product overview Design Summary for WCSP Little Logic (Rev. B) 04 Nov 2004
Application note Semiconductor Packing Material Electrostatic Discharge (ESD) Protection 08 Jul 2004
Application note Selecting the Right Level Translation Solution (Rev. A) 22 Jun 2004
User guide Signal Switch Data Book (Rev. A) 14 Nov 2003
Application note Use of the CMOS Unbuffered Inverter in Oscillator Circuits 06 Nov 2003
User guide LVC and LV Low-Voltage CMOS Logic Data Book (Rev. B) 18 Dez 2002
Application note Texas Instruments Little Logic Application Report 01 Nov 2002
Application note TI IBIS File Creation, Validation, and Distribution Processes 29 Aug 2002
More literature Standard Linear & Logic for PCs, Servers & Motherboards 13 Jun 2002
Application note 16-Bit Widebus Logic Families in 56-Ball, 0.65-mm Pitch Very Thin Fine-Pitch BGA (Rev. B) 22 Mai 2002
Application note Power-Up 3-State (PU3S) Circuits in TI Standard Logic Devices 10 Mai 2002
More literature STANDARD LINEAR AND LOGIC FOR DVD/VCD PLAYERS 27 Mär 2002
Application note Migration From 3.3-V To 2.5-V Power Supplies For Logic Devices 01 Dez 1997
Application note Bus-Interface Devices With Output-Damping Resistors Or Reduced-Drive Outputs (Rev. A) 01 Aug 1997
Application note CMOS Power Consumption and CPD Calculation (Rev. B) 01 Jun 1997
Application note LVC Characterization Information 01 Dez 1996
Application note Input and Output Characteristics of Digital Integrated Circuits 01 Okt 1996
Application note Live Insertion 01 Okt 1996
Design guide Low-Voltage Logic (LVC) Designer's Guide 01 Sep 1996
Application note Understanding Advanced Bus-Interface Products Design Guide 01 Mai 1996

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