74LVC245A OCTAL BUS TRANSCEIVER WITH 3 STATE OUTPUTS Description Pin Assignments The 74LVC245A is an octal transceiver designed for asynchronous communication between data buses. The device transmits data from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the direction-control (DIR) input. The output-enable (OE) pin can be used to disable the device so the buses effectively are isolated. 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 Applications Sinks or Sources 24ma at V = 3V CC General Purpose Logic CMOS Low Power Consumption Bus Driving I Supports Partial Power Down Operation OFF Power Down Signal Isolation Inputs or Outputs Accept Up to 5.5V Wide array of products such as: Inputs Can Be Driven by 3.3V or 5V Allowing for Mixed Voltage PCs, Notebooks, Netbooks, Ultrabooks Applications Networking Computer Peripherals, Hard Drives, CD/DVD Schmitt Trigger Action at All Inputs ROM Typical V (Quiet Output Ground Bounce) Less Than 0.8V with OLP TV, DVD, DVR, Set Top Box V = 3.3V and T = +25C CC A Typical V (Quiet Output dynamic VOH) Greater than 2.0V with OHV 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 74LVC245A Ordering Information 74 LVC 245A xxx -13 Logic Device Function Package Packing 74 : Logic Prefix 245 : Octal Bus T20 : TSSOP-20 -13 : 13 Tape & Reel Transceiver with Q20 : QFN-20 3-state Outputs Package 13 Tape and Reel Package Package Part Number Code Size (Note 4 & 5) Quantity Part Number Suffix 6.4mm X 6.5mm X 1.2mm 74LVC245AT20-13 T20 TSSOP-20 2500/Tape & Reel -13 0.65 mm lead pitch 2.5mm X 4.5mm X 0.95mm 74LVC245AQ20-13 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