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SN74LS669N PDF预览

SN74LS669N

更新时间： 2024-09-13 23:06:23
品牌 Logo 应用领域
安森美 - ONSEMI 计数器触发器逻辑集成电路光电二极管输出元件
页数 文件大小 规格书
4页 78K
描述
SYNCHRONOUS 4-BIT UP/DOWN COUNTER

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中文翻译

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SN74LS669N 技术参数

是否Rohs认证： 不符合生命周期：Obsolete
零件包装代码：DIP包装说明：DIP, DIP16,.3
针数：16Reach Compliance Code：not_compliant
HTS代码：8542.39.00.01风险等级：5.21
其他特性：TCO OUTPUT计数方向：BIDIRECTIONAL
系列：LSJESD-30 代码：R-PDIP-T16
JESD-609代码：e0长度：19.175 mm
负载/预设输入：YES逻辑集成电路类型：BINARY COUNTER
最大频率@ Nom-Sup：25000000 Hz最大I（ol）：0.008 A
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：DIP
封装等效代码：DIP16,.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最大电源电流（ICC）：34 mA
传播延迟（tpd）：27 ns认证状态：Not Qualified
座面最大高度：4.44 mm子类别：Counters
最大供电电压 (Vsup)：5.25 V最小供电电压 (Vsup)：4.75 V
标称供电电压 (Vsup)：5 V表面贴装：NO
技术：TTL温度等级：COMMERCIAL
端子面层：Tin/Lead (Sn/Pb)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最小 fmax：25 MHz
Base Number Matches：1

SN74LS669N 数据手册

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SN54/74LS669  
SYNCHRONOUS 4-BIT  
UP/DOWN COUNTER  
The SN54/74LS669 is a synchronous 4-bit up/down counter. The LS669 is  
a 4-bit binary counter. For high speed counting applications, this presettable  
counter features an internal carry lookahead for cascading purposes. By  
clocking all flip-flops simultaneously so the outputs change coincident with  
each other (when instructed to do so by the count enable inputs and internal  
gating) synchronous operation is provided. This helps to eliminate output  
counting spikes, normally associated with asynchronous (ripple-clock) count-  
ers. Thefourmaster-slaveflip-flopsaretriggeredontherising(positive-going)  
edge of the clock waveform by a buffered clock input.  
SYNCHRONOUS 4-BIT  
UP/DOWN COUNTER  
LOW POWER SCHOTTKY  
Circuitry of the load inputs allows loading with the carry-enable output of the  
cascaded counters. Because loading is synchronous, disabling of the counter  
by setting up a low level on the load input will cause the outputs to agree with  
the data inputs after the next clock pulse.  
J SUFFIX  
CERAMIC  
Cascading counters for N-bit synchronous applications are provided by the  
carry look-ahead circuitry, without additional gating. Two count-enable inputs  
and a carry output help accomplish this function. Count-enable inputs (P and  
T) must both be low to count. The level of the up-down input determines the  
direction of the count. When the input level is low, the counter counts down,  
and when the input is high, the count is up. Input T is fed forward to enable the  
carry output. The carry output will now produce a low level output pulse with a  
CASE 620-09  
16  
1
N SUFFIX  
PLASTIC  
CASE 648-08  
16  
duration ≈ equal to the high portion of the Q output when counting up and  
A
1
when counting down ≈ equal to the low portion of the Q output. This low level  
A
carry pulse may be utilized to enable successive cascaded stages. Regard-  
less of the level of the clock input, transitions at the P or T inputs are allowed.  
By diode-clamping all inputs, transmission line effects are minimized which  
allows simplification of system design.  
Any changes at control inputs (ENABLE P, ENABLE T, LOAD, UP/DOWN)  
will have no effect on the operating mode until clocking occurs because of the  
fully independant clock circuits. Whether enabled, disabled, loading or count-  
ing, the function of the counter is dictated entirely by the conditions meeting  
the stable setup and hold times.  
D SUFFIX  
SOIC  
CASE 751B-03  
16  
1
ORDERING INFORMATION  
• Programmable Look-Ahead Up/Down Binary/Decade Counters  
• Fully Synchronous Operation for Counting and Programming  
• Internal Look-Ahead for Fast Counting  
• Carry Output for n-Bit Cascading  
SN54LSXXXJ  
SN74LSXXXN Plastic  
SN74LSXXXD SOIC  
Ceramic  
• Fully Independent Clock Circuit  
• Buffered Outputs  
CONNECTION DIAGRAM (TOP VIEW)  
OUTPUTS  
RIPPLE  
ENABLE  
T
Q
D
CARRY  
OUTPUT  
V
Q
Q
Q
LOAD  
9
CC  
A
B
C
16  
15  
14  
13  
12  
11  
10  
Q
Q
Q
Q
RIPPLE  
CARRY  
OUTPUT  
ENABLE  
T
A
B
C
D
LOAD  
UP/DOWN  
ENABLE  
P
CK  
A
B
C
D
1
2
3
4
5
6
8
7
U/D  
CK  
A
B
C
D
ENABLE GND  
P
DATA INPUTS  
FAST AND LS TTL DATA  
5-1  
1234

中文翻译

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SN74LS669N 替代型号

型号 品牌 替代类型 描述 数据表
SN74LS169N ONSEMI

功能相似

 BCD DECADE/MODULO 16 BINARY SYNCHRONOUS BI-DIRECTIONAL COUNTERS
SN54LS169J ONSEMI

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 BCD DECADE/MODULO 16 BINARY SYNCHRONOUS BI-DIRECTIONAL COUNTERS

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