74LVC244A
OCTAL BUFFER/LINE DRIVER WITH 3 STATE OUTPUTS
Description Pin Assignments
The 74LVC244A provides 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.
The device is designed for operation with a power supply range of
1.65V to 3.6V.
The inputs are tolerant to 5.5V allowing this device to be used in a
mixed voltage environment. The device is fully specified for partial
power down applications using I . The I circuitry disables the
OFF OFF
output preventing damaging current backflow when the device is
powered down.
Features
Supply Voltage Range from 1.65V to 3.6V
Sinks or Sources 24ma at V = 3V
CC
CMOS Low Power Consumption
Applications
I Supports Partial - Power Down Operation
OFF
General Purpose Logic
Inputs or Outputs Accept up to 5.5V
Bus Driving
Inputs can be Driven by 3.3V or 5V Allowing for Mixed Voltage
Power Down Signal Isolation
Applications
Wide array of products such as:
Schmitt Trigger Action at All Inputs
PCs, Notebooks, Netbooks, Ultrabooks
Typical V (Quiet Output Ground Bounce) Less than 0.8V with
OLP
Networking Computer Peripherals, Hard Drives, CD/DVD
V = 3.3V and T = +25C
CC A
ROM
Typical V (Quiet Output Dynamic VOH) Greater than 2.0V
OHV
TV, DVD, DVR, Set Top Box
with V = 3.3V and T = +25C
CC A
ESD Protection Tested per JESD 22
Exceeds 200-V Machine Model (A115)
Exceeds 2000-V Human Body Model (A114)
Exceeds 1000-V Charged Device Model (C101)
Latch-Up Exceeds 250mA per JESD 78, Class I
All devices are:
Totally Lead-Free & Fully RoHS compliant (Notes 1 & 2)
Halogen and Antimony Free. Green Device (Note 3)
Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See
74LVC244A
Ordering Information
74 LVC 244A xxx -13
Logic Device Function Package Packing
74 : Logic Prefix 244 : Octal T20 : TSSOP-20 -13 : 13 Tape & Reel
Buffer/Line
Q20 : QFN-20
Driver with 3
State Outputs
Package Package 13 Tape and Reel
Package
Part Number
Code (Note 4 & 5) Size
Quantity Part Number Suffix
6.4mm X 6.5mm X 1.2mm
74LVC244AT20-13 T20 TSSOP-20 2500/Tape & Reel -13
0.65 mm lead pitch
2.5mm X 4.5mm X 0.95mm
74LVC244AQ20-13 Q20 V-QFN4525-20 2500/Tape & Reel -13
0.50 mm lead pitch
Notes: 4. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at