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74ACT16254DGGR 数据表(PDF) 1 Page - Texas Instruments |
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74ACT16254DGGR 数据表(HTML) 1 Page - Texas Instruments |
1 / 6 page 74ACT16254 16-BIT ADDRESS/DATA MULTIPLEXER WITH 3-STATE OUTPUTS SCAS527A – AUGUST 1995 – NOVEMBER 1995 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D Member of the Texas Instruments Widebus ™ Family D Latch-Up Performance Exceeds 500 mA Per JEDEC Standard JESD-17 D Bus-Hold Inputs Eliminate the Need for External Pullup Resistors D Typical VOLP (Output Ground Bounce) < 0.8 V at VCC = 5 V, TA = 25°C D Distributed VCC and GND Pin Configuration Minimizes High-Speed Switching Noise D Packaged in Plastic Thin Shrink Small-Outline (DGG) Package description The 74ACT16254 is a dual 16-bit, noninverting bus-interface device. The A and C ports perform a transceiver function, like that of the 74ACT245. The B and C ports perform the buffer/driver function of the 74ACT244. The A and C port outputs are designed to sink up to 12 mA. The 74ACT16254 is designed for asynchronous communication between data buses. The control function implementation minimizes external timing requirements. Data transmission from the A port to the C port, C port to A port, or B port to C port is accomplished by setting the appropriate logic levels on the bus enable (EN1 and EN2) inputs. All outputs are disabled when logic highs are placed on both EN1 and EN2; the buses are effectively isolated. The 74ACT16254 is packaged in TI’s thin shrink small-outline package (DGG), which provides twice the I/O pin count and functionality of standard small-outline packages in the same printed-circuit-board area. Active bus-hold circuitry is provided to hold unused or floating data and I/O pins at a valid logic level. The 74ACT16254 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. Widebus is a trademark of Texas Instruments Incorporated. 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. 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 29 30 31 32 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 B1 B3 B6 B7 B9 GND B11 B13 B15 VCC A16 A15 A14 GND A13 A12 A11 A10 GND A9 A8 A7 VCC A6 A5 A4 GND A3 A2 A1 EN2 EN1 B2 B4 B6 B8 B10 GND B12 B14 B16 VCC C16 C15 C14 GND C13 C12 C11 C10 GND C9 C8 C7 VCC C6 C5 C4 GND C3 C2 C1 NC NC DGG PACKAGE (TOP VIEW) NC – No internal connection |
类似零件编号 - 74ACT16254DGGR |
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类似说明 - 74ACT16254DGGR |
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