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74ACT11478NT

更新时间： 2024-11-26 02:58:51
品牌 Logo 应用领域
德州仪器 - TI 驱动光电二极管输出元件逻辑集成电路
页数 文件大小 规格书
5页 84K
描述
METASTABLE-RESISTAND OCTAL D-TYPE DUAL-RANK FLIP-FLOP WITH 3-STATE OUTPUTS

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74ACT11478NT 技术参数

是否无铅： 含铅是否Rohs认证： 不符合
生命周期：Obsolete包装说明：DIP, DIP24,.3
Reach Compliance Code：not_compliant风险等级：5.75
系列：ACTJESD-30 代码：R-PDIP-T24
长度：31.64 mm负载电容（CL）：50 pF
逻辑集成电路类型：BUS DRIVER最大I（ol）：0.024 A
位数：8功能数量：1
端口数量：2端子数量：24
最高工作温度：85 °C最低工作温度：-40 °C
输出特性：3-STATE输出极性：TRUE
封装主体材料：PLASTIC/EPOXY封装代码：DIP
封装等效代码：DIP24,.3封装形状：RECTANGULAR
封装形式：IN-LINE峰值回流温度（摄氏度）：NOT SPECIFIED
电源：5 V认证状态：Not Qualified
座面最大高度：5.08 mm子类别：FF/Latches
最大供电电压 (Vsup)：5.5 V最小供电电压 (Vsup)：4.5 V
标称供电电压 (Vsup)：5 V表面贴装：NO
技术：CMOS温度等级：INDUSTRIAL
端子形式：THROUGH-HOLE端子节距：2.54 mm
端子位置：DUAL处于峰值回流温度下的最长时间：NOT SPECIFIED
触发器类型：POSITIVE EDGE宽度：7.62 mm

74ACT11478NT 数据手册

 浏览型号74ACT11478NT的Datasheet PDF文件第2页浏览型号74ACT11478NT的Datasheet PDF文件第3页浏览型号74ACT11478NT的Datasheet PDF文件第4页浏览型号74ACT11478NT的Datasheet PDF文件第5页 
74ACT11478  
METASTABLE-RESISTAND OCTAL D-TYPE DUAL-RANK FLIP-FLOP  
WITH 3–STATE OUTPUTS  
SCAS131 – APRIL 1990 – REVISED APRIL 1993  
DW OR NT PACKAGE  
•
•
Inputs Are TTL-Voltage Compatible  
(TOP VIEW)  
Specifically Designed for Data  
Synchronization Applications  
1
24  
23  
22  
21  
20  
19  
18  
17  
16  
15  
14  
13  
1Q  
2Q  
3Q  
OE  
1D  
2D  
3D  
4D  
•
Improved Metastable Characteristics  
Provide Greater System Reliability  
2
3
•
•
3-State Outputs Drive Bus Lines Directly  
4
4Q  
5
GND  
GND  
GND  
GND  
5Q  
6Q  
7Q  
8Q  
Flow-Through Architecture to Optimize  
PCB Layout  
6
V
V
CC  
CC  
7
•
•
•
•
Center-Pin V  
Minimize High-Speed Switching Noise  
and GND Configurations to  
CC  
8
5D  
6D  
7D  
8D  
9
EPIC (Enhanced-Performance Implanted  
CMOS) 1- m Process  
10  
11  
12  
500-mA Typical Latch-Up Immunity  
at 125°C  
CLK  
Package Options Include Plastic Small  
Outline Packages and Standard Plastic  
300-mil DIPs  
description  
The 74ACT11478 is an 8-bit dual-rank synchronizer circuit designed specifically for data synchronization  
applications where the normal setup and hold time specifications are frequently violated.  
Synchronization of two digital signals operating at different frequencies is a common system problem. This  
problem is typically solved by synchronizing one of the signals to the local clock through a flip-flop. This solution,  
however, causes the setup and hold time specifications associated with the flip-flop to be violated. When the  
setup or hold time specification is violated, the output response is uncertain.  
A flip-flop is metastable if its output hangs up in the region between V and V . The metastable condition lasts  
IL  
IH  
until the flip-flop recovers into one of its two stable states. With conventional flip-flops, this recovery time can  
be longer than the specified maximum propagation delay.  
The problem of metastability is typically solved by adding an additional layer of synchronization. This type of  
dual ranking is employed in the 74ACT11478. The probability of the second stage entering the metastable state  
is exponentially reduced by this dual-rank architecture. The 74ACT11478 provides a one-chip solution for  
system designers in asynchronous applications.  
The 74ACT11478 is characterized for operation from – 40°C to 85°C.  
FUNCTION TABLE  
(each flip-flop)  
INPUTS  
OUTPUT  
†
OE  
H
L
CLOCK  
D
X
L
Q
Z
L
X
↑
L
↑
H
X
H
L
H
Q
O
†
Data presented at the D input requires two  
clock cycles to appear at the Q output.  
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.  
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265  
12345

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与74ACT11478NT相关器件

型号 品牌 获取价格 描述 数据表
74ACT11520 TI

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 		8-BIT IDENTITY COMPARATORS
74ACT11520D PHILIPS

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 		Identity Comparator, CMOS, PDSO20
74ACT11520D YAGEO

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 		Identity Comparator, ACT Series, 8-Bit, Inverted Output, CMOS, PDSO20
74ACT11520D-T PHILIPS

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 		Identity Comparator, CMOS, PDSO20
74ACT11520D-T YAGEO

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 		Identity Comparator, ACT Series, 8-Bit, Inverted Output, CMOS, PDSO20
74ACT11520DW TI

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 		暂无描述
74ACT11520DWR TI

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 		暂无描述
74ACT11520N TI

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 		8-Bit Identity Comparators 20-PDIP -40 to 85
74ACT11520N PHILIPS

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 		Identity Comparator, CMOS, PDIP20
74ACT11520N YAGEO

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 		Identity Comparator, ACT Series, 8-Bit, Inverted Output, CMOS, PDIP20

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