SN74CBT34X245 Datasheet | Texas Instruments

description The SN74CBT34X245 provides 32 bits of high-speed TTL-patible bus switching. The low on-state resistance of the switch allows connections to be made with minimal propagation delay. The device is organized as four 8-bit bus switches, two 16-bit bus switches, or one 32-bit bus switch. When output enable (OE) is low, the switch is on, and port A is connected to port B. When OE is high, the switch is open, and the high-impedance state exists between the two ports. This device is fully specified for partial-powerdown applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down. SN74CBT34X245 32-BIT FET BUS SWITCH SCDS089C - MAY 1999 - REVISED MAY 2001 DBB PACKAGE (TOP VIEW) NC 1 1A1 2 1A2 3 1A3 4 1A4 5 1A5 6 1A6 7 1A7 8 1A8 9 GND 10 NC 11 2A1 12 2A2 13 2A3 14 2A4 15 2A5 16 2A6 17 2A7 18 2A8 19 GND 20 NC 21 3A1 22 3A2 23 3A3 24 3A4 25 3A5 26 3A6 27 3A7 28 3A8 29 GND 30 NC 31 4A1 32 4A2 33 4A3 34 4A4 35 4A5 36 4A6 37 4A7 38 4A8 39 GND 40 80 VCC 79 1OE 78 1B1 77 1B2 76 1B3 75 1B4 74 1B5 73 1B6 72 1B7 71 1B8 70 VCC 69 2OE 68 2B1 67 2B2 66 2B3 65 2B4 64 2B5 63 2B6 62 2B7 61 2B8 60 VCC 59 3OE 58 3B1 57 3B2 56 3B3 55 3B4 54 3B5 53 3B6 52 3B7 51 3B8 50 VCC 49 4OE 48 4B1 47 4B2 46 4B3 45 4B4 44 4B5 43 4B6 42 4B7 41 4B8 - No internal connection Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. Widebus+ is a trademark of Texas Instruments. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright  2001, Texas Instruments Incorporated - POST OFFICE BOX 655303 DALLAS, TEXAS 75265 SN74CBT34X245 32-BIT FET BUS...