74LVT245BB 3.3 V OCTAL BUS TRANSCEIVER WITH 3 STATE OUTPUTS Description Pin Assignments The 74LVT245BB is an octal transceiver designed for asynchronous ( ) Top View ( ) Top Transparent View communication between data buses. The device transmits data from terminal 1 1 20 DIR Vcc index area the A bus to the B bus or from the B bus to the A bus, depending on 19 2 the logic level at the direction-control (DIR) input. The output-enable A0 OE 2 19 OE A0 (OE) Pin can be used to disable the device so the buses effectively 3 18 A1 B0 A1 3 18 B0 are isolated. 4 17 A2 B1 4 17 B1 A2 5 16 A3 B2 5 A3 16 B2 The device is designed for operation with a power supply range of 6 15 6 15 B3 A4 B3 A4 2.7V to 3.6V. 7 A5 14 B4 7 A5 14 B4 A6 8 13 B5 A6 8 13 B5 The inputs are tolerant to 5.5V allowing this device to be used in a 9 12 B6 A7 A7 9 12 B6 mixed voltage environment. The device is fully specified for partial power down applications using I . The I circuitry disables the GND 10 11 B7 OFF OFF output preventing damaging current backflow when the device is TSSOP-20 QFN-20 powered down. Applications Features General Purpose Logic Supply Voltage Range from 2.7V to 3.6V Bus Driving Outputs Sink 64mA or Source 32mA Power Down Signal Isolation CMOS Low Power Consumption Wide Array of Products such as: I Supports Partial Power-Down Operation OFF Servers, PCs, Notebooks, Netbooks, Ultrabooks Inputs or Outputs Accept Up to 5.5V Networking Computer Peripherals, Hard Drives, CD/DVD Inputs Include Bus-Hold No Resistors on Unused Inputs. ROM Inputs can be Driven by 3.3V or 5V Allowing for Mixed Voltage TVs, DVDs, DVRs, Set Top Boxes Applications Schmitt Trigger Action at All Inputs Outputs in 3-State During Power Up Allows for Hot Insertion Outputs Have Less than 125A Leakage when Forced to 5.5V 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 500mA per JESD 78, Class II 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 74LVT245BB Ordering Information 74 LVT 245BB xxx -13 Logic Device Function Package Packing 74: Logic Prefix 245BB: 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 74LVT245BBT20-13 T20 TSSOP-20 2,500/Tape & Reel -13 0.65mm lead pitch 2.5mm x 4.5mm x 0.95mm 74LVT245BBQ20-13 Q20 V-QFN4525-20 2,500/Tape & Reel -13 0.50mm lead pitch Notes: 4. Pad layout as shown on Diodes Incorporateds package outline PDFs, which can be found on our website at