74LVCH244A
OCTAL BUFFER/LINE DRIVER WITH BUS HOLD / 3 STATE OUTPUTS
Description Pin Assignments
The 74LVCH244A 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.
Bus hold circuitry holds unused or un-driven inputs at a high or low
logic state. The use of external pull-up or pull down resistors is not
recommended.
Applications
Features
General Purpose Logic
Supply Voltage Range from 1.65V to 3.6V
Sinks or Sources 24mA at V = 3V Bus Driving
CC
CMOS Low Power Consumption Power Down Signal Isolation
I Supports Partial-Power Down Operation Wide array of products such as:
OFF
Inputs or Outputs Accept up to 5.5V PCs, Notebooks, Netbooks, Ultrabooks
Inputs Can be Driven by 3.3V or 5V Allowing for Mixed Voltage Networking Computer Peripherals, Hard Drives, CD/DVD
Applications ROM
Schmitt Trigger Action at All Inputs TV, DVD, DVR, set top box
Typical V (Quiet Output Ground Bounce) less than 0.8V with
OLP
V = 3.3V and T = +25C
CC A
Typical V (Quiet Output Dynamic VOH) greater than 2.0V
OHV
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
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
74LVCH244A
Ordering Information
74 LVC H244A xxx -13
Logic Device Function Package Packing
74 : Logic Prefix H244 : OCTAL T20 : TSSOP-20 -13 : 13 Tape & Reel
BUFFER/LINE
Q20 : QFN-20
DRIVER WITH
BUS HOLD / 3
STATE
OUTPUTS
13 Tape and Reel
Package Package
Package
Part Number
Code (Notes 4 & 5) Size
Quantity Part Number Suffix
6.4mm X 6.5mm X 1.2mm
74LVCH244AT20-13 T20 TSSOP-20 2500/Tape & Reel -13
0.65 mm lead pitch
2.5mm X 4.5mm X 0.95mm
74LVCH244AQ20-13 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