SN74LVCH32244A_15 Datasheet, PDF (1/13 Pages) Texas Instruments – 32-BIT BUFFER/DRIVER WITH 3-STATE OUTPUTS

www.ti.com
FEATURES
• Member of the Texas Instruments Widebus+™
Family
• Operates From 1.65 V to 3.6 V
• Inputs Accept Voltages to 5.5 V
• Max t_pd of 4.1 ns at 3.3 V
• Typical V_OLP (Output Ground Bounce)
<0.8 V at V_CC = 3.3 V, T_A = 25°C
• Typical V_OHV (Output V_OH Undershoot)
>2 V at V_CC = 3.3 V, T_A = 25°C
• I_off Supports Partial-Power-Down Mode
Operation
SN74LVCH32244A
32-BIT BUFFER/DRIVER
WITH 3-STATE OUTPUTS
SCAS617E – OCTOBER 1998 – REVISED MARCH 2005
• Supports Mixed-Mode Signal Operation on
All Ports (5-V Input/Output Voltage With
3.3-V V_CC)
• Bus Hold on Data Inputs Eliminates the Need
for External Pullup/Pulldown Resistors
• Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
• ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
DESCRIPTION/ORDERING INFORMATION
This 32-bit buffer/driver is designed for 1.65-V to 3.6-V V_CC operation.
The SN74LVCH32244A is designed specifically to improve the performance and density of 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 can be driven from either 3.3-V or 5-V devices. This feature allows the use of these devices as translators
in a mixed 3.3-V/5-V system environment.
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.
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.
Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors
with the bus-hold circuitry is not recommended.
T_A
–40°C to 85°C
ORDERING INFORMATION
PACKAGE ⁽¹⁾
ORDERABLE PART NUMBER
LFBGA – GKE
LFBGA – ZKE (Pb-free)
Tape and reel
SN74LVCH32244AGKER
SN74LVCH32244AZKER
TOP-SIDE MARKING
CH244A
(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Widebus+ is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 1998–2005, Texas Instruments Incorporated