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SN74F161ADE4 PDF预览

SN74F161ADE4

更新时间： 2024-11-06 04:51:15
品牌 Logo 应用领域
德州仪器 - TI 计数器
页数 文件大小 规格书
17页 434K
描述
SYNCHRONOUS 4-BIT BINARY COUNTER

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SN74F161ADE4 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Obsolete零件包装代码：SOIC
包装说明：SOP, SOP16,.25针数：16
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.31
其他特性：TCO OUTPUT计数方向：UP
系列：F/FASTJESD-30 代码：R-PDSO-G16
JESD-609代码：e4长度：9.9 mm
负载电容（CL）：50 pF负载/预设输入：YES
逻辑集成电路类型：BINARY COUNTER最大频率@ Nom-Sup：90000000 Hz
最大I（ol）：0.02 A工作模式：SYNCHRONOUS
湿度敏感等级：1位数：4
功能数量：1端子数量：16
最高工作温度：70 °C最低工作温度：
封装主体材料：PLASTIC/EPOXY封装代码：SOP
封装等效代码：SOP16,.25封装形状：RECTANGULAR
封装形式：SMALL OUTLINE包装方法：TUBE
峰值回流温度（摄氏度）：260电源：5 V
最大电源电流（ICC）：55 mA传播延迟（tpd）：11 ns
认证状态：Not Qualified座面最大高度：1.75 mm
子类别：Counter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：YES技术：TTL
温度等级：COMMERCIAL端子面层：Nickel/Palladium/Gold (Ni/Pd/Au)
端子形式：GULL WING端子节距：1.27 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：3.9 mm
最小 fmax：90 MHz

SN74F161ADE4 数据手册

 浏览型号SN74F161ADE4的Datasheet PDF文件第2页浏览型号SN74F161ADE4的Datasheet PDF文件第3页浏览型号SN74F161ADE4的Datasheet PDF文件第4页浏览型号SN74F161ADE4的Datasheet PDF文件第5页浏览型号SN74F161ADE4的Datasheet PDF文件第6页浏览型号SN74F161ADE4的Datasheet PDF文件第7页 
SN74F161A  
SYNCHRONOUS 4-BIT BINARY COUNTER  
SDFS056B – MARCH 1987 – REVISED AUGUST 2001  
D, DB, OR N PACKAGE  
(TOP VIEW)  
Internal Look-Ahead Circuitry for Fast  
Counting  
Carry Output for N-Bit Cascading  
V
RCO  
Q
CLR  
CLK  
A
1
2
3
4
5
6
7
8
16  
15  
14  
13  
12  
11  
10  
9
CC  
Fully Synchronous Operation for Counting  
A
description  
Q
B
Q
B
C
D
This synchronous, presettable, 4-bit binary  
counter has internal carry look-ahead circuitry  
for use in high-speed counting designs.  
Synchronous operation is provided by having all  
flip-flops clocked simultaneously so that the  
outputs change coincident with each other when  
C
Q
D
ENT  
ENP  
GND  
LOAD  
so instructed by the count-enable (ENP, ENT) inputs and internal gating. This mode of operation eliminates the  
output counting spikes that are normally associated with asynchronous (ripple-clock) counters. However,  
counting spikes can occur on the ripple-carry (RCO) output. A buffered clock (CLK) input triggers the four  
flip-flops on the rising (positive-going) edge of CLK.  
This counter is fully programmable. That is, it can be preset to any number between 0 and 15. Because  
presettingissynchronous, alowlogiclevelattheload(LOAD)inputdisablesthecounterandcausestheoutputs  
to agree with the setup data after the next clock pulse, regardless of the levels of ENP and ENT.  
The clear function is asynchronous, and a low logic level at the clear (CLR) input sets all four of the flip-flop  
outputs to low, regardless of the levels of CLK, LOAD, ENP, and ENT.  
The carry look-ahead circuitry provides for cascading counters for n-bit synchronous applications, without  
additional gating. This function is implemented by the ENP and ENT inputs and an RCO output. Both ENP and  
ENT must be high to count, and ENT is fed forward to enable RCO. RCO, thus enabled, produces a  
high-logic-levelpulse while the count is 15 (HHHH). The high-logic-level overflow ripple-carry pulse can be used  
to enable successive cascaded stages. Transitions at ENP or ENT are allowed, regardless of the level of CLK.  
The SN74F161A features a fully independent clock circuit. Changes at ENP, ENT, or LOAD that modify the  
operating mode have no effect on the contents of the counter until clocking occurs. The function of the counter  
(whether enabled, disabled, loading, or counting) is dictated solely by the conditions meeting the setup and hold  
times.  
ORDERING INFORMATION  
ORDERABLE  
PART NUMBER  
TOP-SIDE  
MARKING  
†
PACKAGE  
T
A
PDIP – N  
SOIC – D  
SSOP – DB  
Tube  
SN74F161AN  
SN74F161AD  
SN74F161ADR  
SN74F161ADBR  
SN74F161AN  
Tube  
0°C to 70°C  
F161A  
Tape and reel  
Tape and reel  
F161A  
†
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines  
are available at www.ti.com/sc/package.  
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.  
Copyright 2001, 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  
1234567...17

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