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SN74LS490NDS PDF预览

SN74LS490NDS

更新时间: 2024-11-29 12:58:47
品牌 Logo 应用领域
摩托罗拉 - MOTOROLA 计数器
页数 文件大小 规格书
5页 164K
描述
LS SERIES, ASYN NEGATIVE EDGE TRIGGERED 4-BIT UP DECADE COUNTER, PDIP16, PLASTIC, DIP-16

SN74LS490NDS 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:unknown
HTS代码:8542.39.00.01风险等级:5.46
计数方向:UP系列:LS
JESD-30 代码:R-PDIP-T16JESD-609代码:e0
长度:20.07 mm负载/预设输入:YES
逻辑集成电路类型:DECADE COUNTER工作模式:ASYNCHRONOUS
位数:4功能数量:2
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
传播延迟(tpd):54 ns认证状态:Not Qualified
座面最大高度:5.08 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:NEGATIVE EDGE
宽度:7.62 mm最小 fmax:65 MHz
Base Number Matches:1

SN74LS490NDS 数据手册

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SN54/74LS490  
DUAL DECADE COUNTER  
The SN54/74LS490 contains a pair of high-speed 4-stage ripple counters.  
Each half of the SN54/74LS490 has individual Clock, Master Reset and Mas-  
ter Set (Preset 9) inputs. Each section counts in the 8, 4, 2, 1 BCD code.  
Dual Version of SN54/74LS490  
Individual Asynchronous Clear and Preset to 9 for Each Counter  
Count Frequency — Typically 65 MHz  
DUAL DECADE COUNTER  
LOW POWER SCHOTTKY  
Input Clamp Diodes Limit High-Speed Termination Effects  
CONNECTION DIAGRAM DIP (TOP VIEW)  
J SUFFIX  
CERAMIC  
CASE 620-09  
16  
1
N SUFFIX  
PLASTIC  
CASE 648-08  
16  
1
PIN NAMES  
LOADING (Note a)  
D SUFFIX  
SOIC  
CASE 751B-03  
HIGH  
LOW  
16  
1
MS  
MR  
CP  
Master Set (Set to 9) Input  
Master Reset  
Clock Input (Active LOW Going Edge)  
Counter Outputs (Note b)  
0.5 U.L.  
0.5 U.L.  
1.5 U.L.  
10 U.L.  
0.25 U.L.  
0.25 U.L.  
1.5 U.L.  
Q Q  
0
5 (2.5) U.L.  
3
ORDERING INFORMATION  
NOTES:  
a) 1 TTL Unit Load (U.L.) = 40 µA HIGH/1.6 mA LOW.  
b) The Output LOW drive factor is 2.5 U.L. for Military (54) and 5 U.L. for Commercial  
(74) Temperature Ranges.  
SN54LSXXXJ  
Ceramic  
SN74LSXXXN Plastic  
SN74LSXXXD SOIC  
LOGIC DIAGRAM (ONE HALF SHOWN)  
TRUTH TABLE  
OUTPUTS  
COUNT  
Q
Q
Q
Q
0
3
2
1
0
1
2
L
L
L
L
L
L
L
L
H
L
H
L
3
4
5
L
L
L
L
H
H
H
L
L
H
L
H
6
7
8
9
L
L
H
H
H
H
L
H
H
L
L
H
L
L
L
H
FAST AND LS TTL DATA  
5-563  

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