16-BIT BUS TRANSCEIVERS AND REGISTERS
54AC16646, 74AC16646
16-BIT BUS TRANSCEIVERS AND REGISTERS
WITH 3-STATE OUTPUTS
SCAS241A – MARCH 1990 – REVISED APRIL 19...
Description
54AC16646, 74AC16646
16-BIT BUS TRANSCEIVERS AND REGISTERS
WITH 3-STATE OUTPUTS
SCAS241A – MARCH 1990 – REVISED APRIL 1996
D Members of the Texas Instruments
Widebust Family
D Independent Registers for A and B Buses D Multiplexed Real-Time and Stored Data D Flow-Through Architecture Optimizes
PCB Layout
D Distributed VCC and GND Pin Configurations
Minimize High-Speed Switching Noise
D EPICt (Enhanced-Performance Implanted
CMOS) 1-mm Process
D 500-mA Typical Latch-Up Immunity at
125°C
D Package Options Include Plastic 300-mil
Shrink Small-Outline (DL) Packages Using 25-mil Center-to-Center Pin Spacings and 380-mil Fine-Pitch Ceramic Flat (WD) Packages Using 25-mil Center-to-Center Pin Spacings
description
The ’AC16646 are 16-bit bus transceivers that consist of D-type flip-flops and control circuitry, with 3-state outputs arranged for multiplexed transmission of data directly from the data bus or from the internal storage registers. The devices can be used as two 8-bit transceivers or one 16-bit transceiver. Data on the A or B bus is clocked into the registers on the low-to-high transition of the appropriate clock (CLKAB or CLKBA) input. Figure 1 illustrates the four fundamental bus-management functions that can be performed with the bus transceivers and registers.
54AC16646 . . . WD PACKAGE 74AC16646 . . . DL PACKAGE
(TOP VIEW)
1DIR 1CLKAB
1SAB GND 1A1 1A2 VCC 1A3 1A4 1A5 GND 1A6 1A7 1A8 2A1 2A2 2A3 GND 2A4 2A5 2A6 VCC 2A7 2A8 GND 2SAB 2CLKAB 2DIR
1 2 3 4 5 6 7 8 9 10 11 ...
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