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74F169SCX PDF预览

74F169SCX

更新时间: 2024-02-03 14:58:12
品牌 Logo 应用领域
其他 - ETC 计数器触发器逻辑集成电路光电二极管
页数 文件大小 规格书
8页 89K
描述
Synchronous Up/Down Counter

74F169SCX 技术参数

生命周期:Obsolete零件包装代码:SOIC
包装说明:0.300 INCH, PLASTIC, SOIC-16针数:16
Reach Compliance Code:unknownHTS代码:8542.39.00.01
风险等级:5.68Is Samacsys:N
计数方向:BIDIRECTIONAL系列:F/FAST
JESD-30 代码:R-PDSO-G16长度:10.11 mm
负载/预设输入:YES逻辑集成电路类型:BINARY COUNTER
工作模式:SYNCHRONOUS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
封装形状:RECTANGULAR封装形式:SMALL OUTLINE
传播延迟(tpd):13 ns座面最大高度:2.108 mm
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
端子形式:GULL WING端子节距:1.27 mm
端子位置:DUAL触发器类型:POSITIVE EDGE
宽度:5.3 mm最小 fmax:70 MHz
Base Number Matches:1

74F169SCX 数据手册

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Unit Loading/Fan Out  
Input IIH/IIL  
U.L.  
Pin Names  
Description  
Output IOH/IOL  
HIGH/LOW  
CEP  
CET  
CP  
Count Enable Parallel Input (Active LOW)  
Count Enable Trickle Input (Active LOW)  
Clock Pulse Input (Active Rising Edge)  
Parallel Data Inputs  
1.0/1.0  
1.0/2.0  
1.0/1.0  
1.0/1.0  
1.0/1.0  
1.0/1.0  
50/33.3  
50/33.3  
20 µA/0.6 mA  
20 µA/1.2 mA  
20 µA/0.6 mA  
20 µA/0.6 mA  
20 µA/0.6 mA  
20 µA/0.6 mA  
1 mA/20 mA  
1 mA/20 mA  
P0P3  
PE  
Parallel Enable Input (Active LOW)  
Up-Down Count Control Input  
Flip-Flop Outputs  
U/D  
Q0Q3  
TC  
Terminal Count Output (Active LOW)  
Functional Description  
Mode Select Table  
The 74F169 uses edge-triggered J-K type flip-flops and  
has no constraints on changing the control or data input  
signals in either state of the clock. The only requirement is  
that the various inputs attain the desired state at least a  
setup time before the rising edge of the clock and remain  
valid for the recommended hold time thereafter. The paral-  
lel load operation takes precedence over other operations,  
as indicated in the Mode Select Table. When PE is LOW,  
the data on the P0P3 inputs enters the flip-flops on the  
Action on Rising  
Clock Edge  
PE CEP CET U/D  
L
H
H
H
H
X
L
X
L
X
H
L
Load (Pn Qn)  
Count Up (Increment)  
Count Down (Decrement)  
No Change (Hold)  
No Change (Hold)  
L
L
H
X
X
H
X
X
next rising edge of the clock. In order for counting to occur,  
both CEP and CET must be LOW and PE must be HIGH;  
the U/D input then determines the direction of counting.  
The Terminal Count (TC) output is normally HIGH and goes  
LOW, provided that CET is LOW, when a counter reaches  
zero in the Count Down mode or reaches 15 for the  
74F169 in the Count Up mode. The TC output state is not a  
function of the Count Enable Parallel (CEP) input level.  
Since the TC signal is derived by decoding the flip-flop  
states, there exists the possibility of decoding spikes on  
TC. For this reason the use of TC as a clock signal is not  
recommended (see logic equations below).  
H = HIGH Voltage Level  
L = LOW Voltage Level  
X = Immaterial  
State Diagram  
1. Count Enable = CEP CET PE  
2. Up: (74F169): TC = Q0 Q1 Q2 Q3 (Up) CET  
3. Down: TC = Q0 Q1 Q2 Q3 (Down) CET  
www.fairchildsemi.com  
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