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SN74AVCBH164245GR-SN74AVCBH164245KR
16-Bit Dual-Supply Bus Xcvr w/ Config. Voltage Xlation and 3-State Outputs 48-TSSOP -40 to 85
1FEATURES
DESCRIPTION/ORDERING INFORMATION
SN74AVCBH164245
16-BIT DUAL-SUPPLY BUS TRANSCEIVER
WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTSSCES393B–JUNE 2002–REVISED MARCH 2008
www.ti.com Memberof the Texas Instruments •
Ioff Supports Partial-Power-Down Mode
Widebus™ Family Operation Dynamic Output Control (DOC™) Circuitry •
Fully Configurable Dual-Rail Design Allows
Dynamically Changes Output Impedance, Each Portto Operate Over the Full 1.4-Vto
Resultingin Noise Reduction Without Speed 3.6-V Power-Supply Range
Degradation •
Bus Hold on Data Inputs Eliminates the Need Dynamic Drive CapabilityIs Equivalentto for External Pullup/Pulldown Resistorsthe High-Impedance State – 1000-V Charged-Device Model (C101)•
Overvoltage-Tolerant Inputs/Outputs Allow
Mixed-Voltage-Mode Data CommunicationsThis 16-bit (dual-octal) noninverting bus transceiver uses two separate configurable power-supply rails. The
A-portis designedto track VCCA. VCCA accepts any supply voltage from 1.4Vto 3.6V. The B-portis designedto
track VCCB. VCCB accepts any supply voltage from 1.4Vto 3.6 V. This allows for universal low-voltage
bidirectional translation between anyof the 1.5-V, 1.8-V, 2.5-V, and 3.3-V voltage nodes.
The SN74AVCBH164245is designed for asynchronous communication between data buses. The device
transmits data from theA busto theB busor from theB busto theA bus, depending on the logic levelat the
direction-control (DIR) input. The output-enable (OE) input can be usedto disable the outputsso the buses are
effectively isolated.
The SN74AVCBH164245is designedso that the control pins (1DIR, 2DIR, 1OE, and 2OE) are suppliedby VCCB.
Active bus-hold circuitryis providedto hold unusedor floating data inputsata valid logic level. Useof pullupor
pulldown resistors with the bus-hold circuitryis not recommended. ensure the high-impedance state during powerupor power down, OE should be tiedto VCCB througha pullup
resistor; the minimum valueof the resistoris determinedby the current-sinking capabilityof the driver.
This deviceis fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs,
preventing damaging current backflow through the device whenitis powered down.If either VCC inputisat GND,
both ports arein the high-impedance state.
ORDERING INFORMATION PACKAGE (1)(2) ORDERABLE PART NUMBER TOP-SIDE MARKINGTSSOP– DGG Tape and reel SN74AVCBH164245GR AVCBH164245
TVSOP– DGV Tape and reel SN74AVCBH164245VR WBH4245–40°Cto 85°C VFBGA– GQL Tape and reel SN74AVCBH164245KR WBH4245
VFBGA– ZQL (Pb-free) Tape and reel SN74AVCBH164245ZQLR WBH4245
(1) Package drawings, thermal data, and symbolizationare availableat www.ti.com/packaging.
(2) Forthe most current package and ordering information, seethe Package Option Addendumatthe endof this document,or seetheTI
websiteat www.ti.com.
