74LVCH244A Datasheet, PDF (1/10 Pages) Diodes Incorporated – OCTAL BUFFER/LINE DRIVER WITH BUS HOLD

74LVCH244A
OCTAL BUFFER/LINE DRIVER WITH BUS HOLD / 3 STATE OUTPUTS
Description
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_OFF. The I_OFF circuitry disables the
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.
Features
• Supply Voltage Range from 1.65V to 3.6V
• Sinks or Sources 24mA at V_CC = 3V
• CMOS Low Power Consumption
• I_OFF Supports Partial-Power Down Operation
• Inputs or Outputs Accept up to 5.5V
• Inputs Can be Driven by 3.3V or 5V Allowing for Mixed Voltage
Applications
• Schmitt Trigger Action at All Inputs
• Typical V_OLP (Quiet Output Ground Bounce) less than 0.8V with
V_CC = 3.3V and T_A = +25°C
• Typical V_OHV (Quiet Output Dynamic VOH) greater than 2.0V
with V_CC = 3.3V and T_A = +25°C
• 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)
Pin Assignments
Applications
• General Purpose Logic
• Bus Driving
• Power Down Signal Isolation
• Wide array of products such as:
ƒ PCs, Notebooks, Netbooks, Ultrabooks
ƒ Networking Computer Peripherals, Hard Drives, CD/DVD
ROM
ƒ TV, DVD, DVR, set top box
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
74LVCH244A
Document number: DS35889 Rev. 1 - 2
1 of 10
www.diodes.com
July 2014
© Diodes Incorporated