WITH 3-STATE OUTPUTS
SCES009O – JULY 1995 – REVISED FEBRUARY 2007
• Operate From 1.65 V to 3.6 V
• Inputs Accept Voltages to 5.5 V
• Max tpd of 5.9 ns at 3.3 V
• Typical VOLP (Output Ground Bounce)
<0.8 V at VCC = 3.3 V, TA = 25°C
• Typical VOHV (Output VOH Undershoot)
>2 V at VCC = 3.3 V, TA = 25°C
• Support Mixed-Mode Signal Operation on All
(5-V Input/Output Voltage With 3.3-V VCC)
• Ioff Supports Partial-Power-Down Mode
• Bus Hold on Data Inputs Eliminates the Need
for External Pullup/Pulldown Resistors
• Latch-Up Performance Exceeds 250 mA Per
• ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
SN54LVCH244A . . . J OR W PACKAGE
SN74LVCH244A . . . DB, DBQ, DGV, DW,
NS, OR PW PACKAGE
SN74LVCH244A . . . RGY PACKAGE
SN54LVCH244A . . . FK PACKAGE
3 2 1 20 19
9 10 11 12 13
The SN54LVCH244A octal buffer/line driver is designed for 2.7-V to 3.6-V VCC operation, and the
SN74LVCH244A octal buffer/line driver is designed for 1.65-V to 3.6-V VCC operation.
These devices are organized as two 4-bit line drivers with separate output-enable (OE) inputs. When OE is low,
these devices pass data from the A inputs to the Y outputs. When OE is high, the outputs are in the
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.
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.
These devices are fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the
outputs, preventing damaging current backflow through the devices when they are powered down.
To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
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.
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 © 1995–2007, Texas Instruments Incorporated