SN74AUCH244_10 Datasheet, PDF (1/12 Pages) Texas Instruments – OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS

D Optimized for 1.8-V Operation and is 3.6-V
I/O Tolerant to Support Mixed-Mode Signal
Operation
D I_off Supports Partial-Power-Down Mode
Operation
D Sub 1-V Operable
D Max t_pd of 1.9 ns at 1.8 V
D Low Power Consumption, 20-µA Max I_CC
D ±8-mA Output Drive at 1.8 V
D Bus Hold on Data Inputs Eliminates the
Need for External Pullup/Pulldown
Resistors
D Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
D ESD Protection Exceeds JESD 22
− 2000-V Human-Body Model (A114-A)
− 200-V Machine Model (A115-A)
− 1000-V Charged-Device Model (C101)
SN74AUCH244
OCTAL BUFFER/DRIVER
WITH 3ĆSTATE OUTPUTS
SCES433 − MARCH 2003
RGY PACKAGE
(TOP VIEW)
1
1A1 2
2Y4 3
1A2 4
2Y3 5
1A3 6
2Y2 7
1A4 8
2Y1 9
10
20
19 2OE
18 1Y1
17 2A4
16 1Y2
15 2A3
14 1Y3
13 2A2
12 1Y4
11
description/ordering information
This octal buffer/driver is operational at 0.8-V to 2.7-V V_CC, but is designed specifically for 1.65-V to 1.95-V V_CC
operation.
The SN74AUCH244 is organized as two 4-bit line drivers with separate output-enable (OE) inputs. When OE
is low, the device passes data from the A inputs to the Y outputs. When OE is high, the outputs are in the
high-impedance state.
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.
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.
ORDERING INFORMATION
TA
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
−40°C to 85°C QFN − RGY
Tape and reel SN74AUCH244RGYR
MT244
† _{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.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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Copyright  2003, Texas Instruments Incorporated
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