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SN74ALVC16269DL датащи(PDF) 1 Page - Texas Instruments |
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SN74ALVC16269DL датащи(HTML) 1 Page - Texas Instruments |
1 / 9 page 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 25 26 27 28 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 OEA OEB1 2B3 GND 2B2 2B1 VCC A1 A2 A3 GND A4 A5 A6 A7 A8 A9 GND A10 A11 A12 VCC 1B1 1B2 GND 1B3 NC SEL OEB2 CLKENA2 2B4 GND 2B5 2B6 VCC 2B7 2B8 2B9 GND 2B10 2B11 2B12 1B12 1B11 1B10 GND 1B9 1B8 1B7 VCC 1B6 1B5 GND 1B4 CLKENA1 CLK NC − No internal connection SN74ALVC16269 12BIT TO 24BIT REGISTERED BUS TRANSCEIVER WITH 3STATE OUTPUTS SCAS417B − OCTOBER 1993 − REVISED JULY 1995 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 D EPIC (Enhanced-Performance Implanted CMOS) Submicron Process D Member of the Texas Instruments Widebus Family D ESD Protection Exceeds 2000 V Per MIL-STD-883C, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0) D Latch-Up Performance Exceeds 250 mA Per JEDEC Standard JESD-17 D Bus Hold on Data Inputs Eliminates the Need for External Pullup/ Pulldown Resistors D Package Options Include Plastic Shrink Small-Outline (DL) and Thin Shrink Small-Outline (DGG) Packages description The SN74ALVC16269 is a 12-bit to 24-bit registered bus transceiver, which is intended for applications where two separate ports must be multiplexed onto, or demultiplexed from, a single port. The device is particularly suitable as an interface between synchronous DRAMs and high-speed microprocessors. The SN74ALVC16269 is designed specifically for low-voltage (3.3-V ) VCC operation; it is tested at 2.5-V, 2.7-V, and 3.3-V VCC. Data is stored in the internal B-port registers on the low-to-high transition of the clock (CLK) input when the appropriate clock-enable (CLKENA) inputs are low. Proper control of these inputs allows two sequential 12-bit words to be presented as a 24-bit word on the B port. For data transfer in the B-to-A direction, a single storage register is provided. The select (SEL) line selects 1B or 2B data for the A outputs. The register on the A output permits the fastest possible data transfer, thus extending the period that the data is valid on the bus. The control terminals are registered so that all transactions are synchronous with CLK. Data flow is controlled by the active-low output enables (OEA, OEB1, OEB2). Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level. The SN74ALVC16269 is available in TI’s shrink small-outline (DL) and thin shrink small-outline (DGG) packages, which provide twice the I/O pin count and functionality of standard small-outline packages in the same printed-circuit-board area. The SN74ALVC16269 is characterized for operation from − 40 °C to 85°C. Copyright 1995, 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. EPIC and Widebus are trademarks of Texas Instruments Incorporated. |
Аналогичный номер детали - SN74ALVC16269DL |
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Аналогичное описание - SN74ALVC16269DL |
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