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74ABTE16245DGGRE4 Datasheet(PDF) 1 Page - Texas Instruments |
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74ABTE16245DGGRE4 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 13 page SN54ABTE16245, SN74ABTE16245 16-BIT INCIDENT-WAVE SWITCHING BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCBS226J – JULY 1993 – REVISED DECEMBER 2001 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D Members of the Texas Instruments Widebus Family D Support the VME64 ETL Specification D Reduced, TTL-Compatible, Input Threshold Range D High-Drive Outputs (IOH = –60 mA, IOL = 90 mA) Support 25-Ω Incident-Wave Switching D VCCBIAS Pin Minimizes Signal Distortion During Live Insertion D Internal Pullup Resistor on OE Keeps Outputs in High-Impedance State During Power Up or Power Down D Distributed VCC and GND Pins Minimize High-Speed Switching Noise D Equivalent 25-Ω Series Damping Resistor on B Port D Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors description The ’ABTE16245 devices are 16-bit (dual-octal) noninverting 3-state transceivers designed for synchronous two-way communication between data buses. The control-function implementation minimizes external timing requirements. These devices can be used as two 8-bit transceivers or one 16-bit transceiver. They allow data transmission 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) input can be used to disable the device so that the buses are effectively isolated. When OE is low, the device is active. The B port has an equivalent 25- Ω series output resistor to reduce ringing. Active bus-hold inputs also are on the B port to hold unused or floating inputs at a valid logic level. The A port provides for the precharging of the outputs via VCCBIAS, which establishes a voltage between 1.3 V and 1.7 V when VCC is not connected. Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors with the bus-hold circuitry is not recommended. Copyright 2001, Texas Instruments Incorporated 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. 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. SN54ABTE16245 . . . WD PACKAGE SN74ABTE16245 . . . DGG OR DL PACKAGE (TOP VIEW) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 1DIR 1B1 2B1 GND 1B2 2B2 VCC 1B3 2B3 GND 1B4 2B4 1B5 2B5 GND 1B6 2B6 VCC 1B7 2B7 GND 1B8 2B8 2DIR VCCBIAS 1A1 2A1 GND 1A2 2A2 VCC 1A3 2A3 GND 1A4 2A4 1A5 2A5 GND 1A6 2A6 VCC 1A7 2A7 GND 1A8 2A8 OE On products compliant to MIL-PRF-38535, all parameters are tested unless otherwise noted. On all other products, production processing does not necessarily include testing of all parameters. |
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