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74ACT16651

更新时间： 2024-11-17 23:00:15
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德州仪器 - TI 输出元件
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10页 177K
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16-BIT TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS

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74ACT16651 数据手册

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SN54ACT16651, 74ACT16651  
16-BIT TRANSCEIVERS AND REGISTERS  
WITH 3-STATE OUTPUTS  
SCAS449A – FEBRUARY 1993 – REVISED APRIL 1996  
SN54ACT16651 . . . WD PACKAGE  
74ACT16651 . . . DL PACKAGE  
(TOP VIEW)  
Members of the Texas Instruments  
Widebus Family  
Inputs Are TTL-Voltage Compatible  
Inverting Data Paths  
1
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  
1OEAB  
1CLKAB  
1SAB  
GND  
1OEBA  
1CLKBA  
1SBA  
GND  
Independent Registers and Enables for  
A and B Buses  
2
3
4
Multiplexed Real-Time and Stored Data  
5
1A1  
1B1  
Flow-Through Architecture Optimizes  
PCB Layout  
6
1A2  
1B2  
7
V
V
CC  
CC  
Distributed V  
and GND Pin  
CC  
8
1A3  
1A4  
1A5  
GND  
1A6  
1A7  
1A8  
2A1  
2A2  
2A3  
GND  
2A4  
2A5  
2A6  
1B3  
1B4  
1B5  
GND  
1B6  
1B7  
1B8  
2B1  
2B2  
2B3  
GND  
2B4  
2B5  
2B6  
Configurations Minimize High-Speed  
Switching Noise  
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
EPIC (Enhanced-Performance Implanted  
CMOS) 1-µm Process  
500-mA Typical Latch-Up Immunity at  
125°C  
Packaged in Plastic 300-mil Shrink  
Small-Outline (DL) Packages and 380-mil  
Fine-Pitch Ceramic Flat (WD) Packages  
Using 25-mil Center-to-Center Pin Spacings  
description  
The SN54ACT16651 and 74ACT16651 are 16-bit  
bus transceivers that consist of D-type flip-flops  
and control circuitry arranged for multiplexed  
transmission of data directly from the data bus or  
from the internal storage registers. These devices  
can be used as two 8-bit transceivers or one 16-bit  
transceiver.  
V
V
CC  
CC  
2A7  
2A8  
GND  
2SAB  
2B7  
2B8  
GND  
2SBA  
2CLKBA  
2OEBA  
2CLKAB  
2OEAB  
Complementary output-enable (OEAB and  
OEBA) inputs are provided to control the  
transceiver functions. Select-control (SAB and  
SBA) inputs are provided to select whether  
real-time or stored data is transferred. A low input  
level selects real-time data, and a high input level  
selects stored data. 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. Figure 1  
illustrates the four fundamental bus-management  
functions that can be performed with the  
SN54ACT16651 and 74ACT16651.  
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.  
Copyright 1996, Texas Instruments Incorporated  
UNLESS OTHERWISE NOTED this document contains PRODUCTION  
DATA information 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.  
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265  
1234567...10

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