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SN74LVCH32245AGKER-SN74LVCH32245AZKER
32-Bit Bus Transceiver With 3-State Output
www.ti.com
FEATURES
SN74LVCH32245A
32-BIT BUS TRANSCEIVER
WITH 3-STATE OUTPUTSSCAS616H–OCTOBER 1998–REVISED MARCH 2005
Supports Mixed-Mode Signal Operation on
All Ports (5-V Input/Output Voltage With•
Memberof the Texas Instruments Widebus+™
3.3-V VCC)Family Bus Hold on Data Inputs Eliminates the Need•
Operates From 1.65Vto 3.6V
for External Pullup/Pulldown Resistors•
Inputs Accept Voltagesto 5.5V •
Other Productsto Consider: SN74LVC32245•
Maxtpdof4nsat 3.3V •
Latch-Up Performance Exceeds 100 mA Per•
Typical VOLP (Output Ground Bounce) JESD 78, ClassII<0.8Vat VCC= 3.3V,TA= 25°C •
ESD Protection Exceeds JESD22•
Typical VOHV (Output VOH Undershoot) 2000-V Human-Body Model (A114-A)>2Vat VCC= 3.3V, TA= 25°C 200-V Machine Model (A115-A)•
Ioff Supports Partial-Power-Down Mode
Operation – 1000-V Charged-Device Model (C101)The SN74LVCH32245Ais designed for asynchronous communication between data buses. The control-function
implementation minimizes external timing requirements.
This device can be usedas four 8-bit transceivers, two 16-bit transceivers,or one 32-bit transceiver.It allows
data transmission from theA busto theB busor from theB busto theA bus, dependingon the logic levelat the
direction-control (DIR) input. The output-enable (OE) input can be usedto disable the device so that the buses
effectively are isolated.
Inputs canbe driven from either 3.3-Vor 5-V devices. This feature allows the useof these devicesas translatorsa mixed 3.3-V/5-V system environment.
This deviceis fully specified for partial-power-down applications usingIoff. TheIoff circuitry disables the outputs,
preventing damaging current backflow through the device whenitis powered down. ensure the high-impedance state during power upor power down, OE should be tiedtoVCC througha pullup
resistor; the minimum valueof the resistoris determinedby the current-sinking capabilityof the driver.
Active bus-hold circuitryis providedto hold unusedor floating data inputsata valid logic level. Useof pullupor
pulldown resistors with the bus-hold circuitryis not recommended. The bus-hold circuitryis partof the input
circuit andis not disabledby OEor DIR.
ORDERING INFORMATION PACKAGE(1) ORDERABLE PART NUMBER TOP-SIDE MARKINGLFBGA– GKE SN74LVCH32245AGKER–40°Cto 85°C Tape and reel CH245ALFBGA– ZKE (Pb-free) SN74LVCH32245AZKER
(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelinesare availableat
www.ti.com/sc/package.
