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SN74ABTE16246DL bảng dữ liệu(PDF) 1 Page - Texas Instruments |
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1 / 13 page SN74ABTE16246 11-BIT INCIDENT-WAVE SWITCHING BUS TRANSCEIVER WITH 3-STATE AND OPEN-COLLECTOR OUTPUTS SCBS227J – JULY 1993 – REVISED AUGUST 2003 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D Member of the Texas Instruments Widebus Family D Supports the VME64 ETL Specification D Reduced TTL-Compatible Input Threshold Range D High-Drive Outputs (IOH = –60 mA, IOL = 90 mA) Support Equivalent 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/ordering information The SN74ABTE16246 is an 11-bit noninverting transceiver designed for asynchronous two-way communication between buses. This device has open-collector and 3-state outputs. The device allows 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 on the B port 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. ORDERING INFORMATION TA PACKAGE† ORDERABLE PART NUMBER TOP-SIDE MARKING –40 C to 85 C SSOP – DL Tube SN74ABTE16246DL ABTE16246 –40 °C to 85°C SSOP – DL Tape and reel SN74ABTE16246DLR ABTE16246 TSSOP – DGG Tape and reel SN74ABTE16246DGGR ABTE16246 † Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. Copyright 2003, 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. 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 11OE 11DIR 11B GND 10B 9B VCC 8BI 8BO GND 7BO 6BI 6BO 5BO GND 4BO 4BI VCC 3BO 2BI GND 2BO 1BO 1BI VCCBIAS 11A 10DIR GND 10A 9A VCC 9DIR 8A GND 7A 7BI 6A 5A GND 5BI 4A VCC 3A 3BI GND 2A 1A OE |
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