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74ACT11651NT датащи(PDF) 1 Page - Texas Instruments |
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74ACT11651NT датащи(HTML) 1 Page - Texas Instruments |
1 / 9 page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 GAB A1 A2 A3 A4 GND GND GND GND A5 A6 A7 A8 GBA CAB SAB B1 B2 B3 B4 VCC VCC B5 B6 B7 B8 CBA SBA DW OR NT PACKAGE (TOP VIEW) 74ACT11651 OCTAL BUS TRANSCEIVER AND REGISTER WITH 3STATE OUTPUTS SCAS134 − D3445, MARCH 1990 − REVISED APRIL 1993 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 Copyright 1993, Texas Instruments Incorporated 1 • Inputs Are TTL-Voltage Compatible • Bus Transceivers/Registers • Independent Registers and Enables for A and B Buses • Multiplexed Real-Time and Stored Data • Inverting Data Paths • Flow-Through Architecture to Optimize PCB Layout • Center-Pin V CC and GND Configurations to Minimize High-Speed Switching Noise • EPICt (Enhanced-Performance Implanted CMOS) 1- mm Process • 500-mA Typical Latch-Up Immunity at 125 °C • Package Options Include Plastic Small Outline Packages and Standard Plastic 300-mil DIPs description These devices consist of bus transceiver circuits, D-type flip-flops, and control circuitry arranged for multiplexed transmission of data directly from the data bus or from the internal storage registers. Enables GAB and GBA are provided to control the transceiver functions. SAB and SBA control pins are provided to select whether real-time or stored data is transferred. The circuitry used for select control eliminates the typical decoding glitch that occurs in a multiplexer during the transition between stored and real-time data. A low input level selects real-time data and a high selects stored data. Figure 1 illustrates the four fundamental bus-management functions that can be performed with the octal bus transceivers and registers. Data on the A or B bus, or both, can be stored in the internal D flip-flops by low-to-high transitions at the appropriate clock pins (CAB or CBA) regardless of the select or enable control pins. When SAB and SBA are in the real-time transfer mode, it is also possible to store data without using the internal D-type flip-flops by simultaneously enabling GAB and GBA. In this configuration, each output reinforces its input. Thus, when all other data sources to the two sets of bus lines are at high impedance, each set of bus lines remains at its last state. The 74ACT11651 is characterized for operation from − 40 °C to 85°C. EPIC is a trademark of 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. |
Аналогичный номер детали - 74ACT11651NT |
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Аналогичное описание - 74ACT11651NT |
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