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74LVCH322244AZKERTIN/a498avai32-Bit Buffer/Driver With 3-State Outputs
SN74LVCH322244AKRTIN/a498avai32-Bit Buffer/Driver With 3-State Outputs


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74LVCH322244AZKER-SN74LVCH322244AKR
32-Bit Buffer/Driver With 3-State Outputs
www.ti.com
FEATURES
DESCRIPTION/ORDERING INFORMATION
SN74LVCH322244A
32-BIT BUFFER/DRIVER
WITH 3-STATE OUTPUTS

SCES405B–JULY 2002–REVISED APRIL 2005 Ioff Supports Partial-Power-Down Mode
Operation
Memberof the Texas Instruments Widebus+™
Family Mixed-Mode Signal Operation (5-V Input/Output Voltage With
Operates From 1.65Vto 3.6V Inputs Accept Voltagesto 5.5V on Data Inputs Eliminates the Maxtpdof 4.4 nsat 3.3V External Pullup/Pulldown Output Ports Have Equivalent 26-Ω ResistorsResistors, So No External Resistors Are Latch-Up Performance Exceeds 100 mARequired Per JESD 78, ClassII Typical VOLP (Output Ground Bounce) ESD Protection Exceeds JESD22< 0.8Vat VCC= 3.3V,TA= 25°C
This 32-bit buffer/driveris designedfor 1.65-Vto 3.6-VVCC operation.
The SN74LVCH322244Ais designed specificallyto improve the performance and densityof 3-state memory
address drivers, clock drivers, and bus-oriented receivers and transmitters.
The device can be used as eight 4-bit buffers, four 8-bit buffers, two 16-bit buffers,or one 32-bit buffer.It
provides true outputs and symmetrical active-low output-enable (OE) inputs.
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.
The outputs, which are designedto sinkupto12 mA, include equivalent 26-Ω resistorsto reduce overshoot and
undershoot. 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 circuitry holds unusedor undriven inputsata valid logic state. Useof pullupor pulldown resistors
with the bus-hold circuitryis not recommended.
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.
ORDERING INFORMATION PACKAGE(1) ORDERABLE PART NUMBER TOP-SIDE MARKING

LFBGA– GKE SN74LVCH322244AKR–40°Cto 85°C Tape and reel CG244ALFBGA– ZKE (Pb-free) 74LVCH322244AZKER
(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelinesare availableat
www.ti.com/sc/package.
FUNCTION TABLE
(EACH 4-BIT BUFFER)
INPUTS OUTPUT A
H H L L X Z
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