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74AVCB324245ZKER-SN74AVCB324245KR
32-BIT DUAL-SUPPLY BUS TRANSCEIVER WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS
www.ti.com
FEATURES
DESCRIPTION/ORDERING INFORMATION
SN74AVCB324245
32-BIT DUAL-SUPPLY BUS TRANSCEIVER
WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTSSCES485A–AUGUST 2003–REVISED MARCH 2005
Inputs/Outputs Can Tolerate upto 4.6V,
Which Allows Mixed-Voltage-Mode Data•
Memberof the Texas Instruments Widebus+™
CommunicationsFamily Ioff Supports Partial-Power-Down Mode•
DOC™ Circuitry Dynamically Changes Output
OperationImpedance, Resultingin Noise Reduction
Without Speed Degradation •
Fully Configurable Dual-Rail Design Allows
Each Portto Operate Over the Full 1.4-Vto•
Dynamic Drive CapabilityIs Equivalentto 3.6-V Power-Supply RangeStandard Outputs With IOH and IOLof Latch-Up Performance Exceeds 100 mA Per– ±24
mAat 3-VVCC JESD 78, ClassII– ±15
mAat 2.3-V VCC •
ESD Protection Exceeds JESD22–±9
mAat 1.65-V VCC If EitherVCC InputIsat GND, Both Ports Arein
the High-Impedance StateThis 32-bit noninverting bus transceiver uses two separate configurable power-supply rails. TheA portis
designedto track VCCA. VCCA accepts any supply voltage from 1.4Vto 3.6V. TheB portis designedto track
VCCB. VCCB accepts any supply voltage from 1.4Vto 3.6V. 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 SN74AVCB324245is designed for asynchronous communication between data buses. The device transmits
data from theA busto theB bus or 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 SN74AVCB324245is designedso that the control pins (1DIR, 2DIR, 1OE, and 2OE) are suppliedby VCCB. ensure the high-impedance state during powerupor power down, OE shall 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. TheIoff 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) ORDERABLE PART NUMBER TOP-SIDE MARKINGLFBGA– GKE SN74AVCB324245KR–40°Cto 85°C Tape and reel WD4245LFBGA– ZKE (Pb-free) 74AVCB324245ZKER
(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelinesare availableat
www.ti.com/sc/package.
