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