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74AC11590

更新时间： 2024-11-11 03:53:07
品牌 Logo 应用领域
德州仪器 - TI 计数器输出元件
页数 文件大小 规格书
9页 124K
描述
8-BIT BINARY COUNTER WITH REGISTERED 3-STATE OUTPUTS

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74AC11590 数据手册

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74AC11590  
8-BIT BINARY COUNTER  
WITH REGISTERED 3-STATE OUTPUTS  
SCAS194 – D3988, MARCH 1992 – REVISED APRIL 1993  
DW OR N PACKAGE  
(TOP VIEW)  
• Parallel Registered Outputs  
• Internal Counters Have Direct Clear  
• Flow-Through Architecture Optimizes  
Q
Q
Q
GND  
GND  
GND  
GND  
Q
A
CCK  
CCKEN  
CCLR  
1
2
3
4
5
6
7
8
9
10  
20  
19  
18  
17  
16  
15  
14  
13  
12  
11  
B
PCB Layout  
C
D
• Center-Pin V  
and GND Configurations  
Minimize High-Speed Switching Noise  
CC  
V
CC  
• EPIC (Enhanced-Performance Implanted  
CMOS) 1-µm Process  
V
CC  
OE  
RCK  
RCO  
• 500-mA Typical Latch-Up Immunity  
at 125°C  
Q
Q
F
E
• Package Options Include Plastic  
Small-Outline Packages and Standard  
Plastic 300-mil DIPs  
Q
Q
H
G
description  
The 74AC11590 contains an 8-bit binary counter that feeds an 8-bit storage register. The storage register has  
parallel outputs. Separate clocks are provided for both the binary counter and storage register.  
The binary counter features a direct clear (CCLR) input and a count-enable (CCKEN) input. For cascading, a  
ripple-carry (RCO) output is provided. Expansion is easily accomplished for two stages by connecting RCO of  
the first stage to CCKEN of the second stage. Cascading for larger count chains can be accomplished by  
connecting RCO of each stage to CCK of the following stage.  
Both the register and the counter have individual positive-edge-triggered clocks. If both clocks are connected  
together, the counter state is always one count ahead of the register. Internal circuitry prevents clocking from  
the clock enable.  
The 74AC11590 is characterized for operation from –40°C to 85°C.  
†
logic symbol  
14  
13  
EN3  
C2  
OE  
RCK  
12  
CTR8  
18  
19  
4
RCO  
G1  
1+  
CT = 0  
CCKEN  
CCK  
(CT = 255) Z4  
17  
CCLR  
20  
1
Q
2D  
3
A
B
C
Q
Q
2
3
Q
Q
Q
Q
Q
D
E
F
8
9
10  
11  
G
H
†
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.  
EPIC is a trademark of Texas Instruments Incorporated.  
Copyright 1993, 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.  
2–1  
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265  
1234567...9

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74AC11593DWR ROCHESTER

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