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MC14518B

更新时间： 2024-11-02 22:58:11
品牌 Logo 应用领域
摩托罗拉 - MOTOROLA /
页数 文件大小 规格书
7页 206K
描述
DUAL UP COUNTERS

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中文翻译

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MC14518B 数据手册

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SEMICONDUCTOR TECHNICAL DATA  
The MC14518B dual BCD counter and the MC14520B dual binary counter  
are constructed with MOS P–channel and N–channel enhancement mode  
devices in a single monolithic structure. Each consists of two identical,  
independent, internally synchronous 4–stage counters. The counter stages  
are type D flip–flops, with interchangeable Clock and Enable lines for  
incrementing on either the positive–going or negative–going transition as  
required when cascading multiple stages. Each counter can be cleared by  
applying a high level on the Reset line. In addition, the MC14518B will count  
out of all undefined states within two clock periods. These complementary  
MOS up counters find primary use in multi–stage synchronous or ripple  
counting applications requiring low power dissipation and/or high noise  
immunity.  
L SUFFIX  
CERAMIC  
CASE 620  
P SUFFIX  
PLASTIC  
CASE 648  
DW SUFFIX  
SOIC  
CASE 751G  
•
•
•
•
Diode Protection on All Inputs  
Supply Voltage Range = 3.0 Vdc to 18 Vdc  
Internally Synchronous for High Internal and External Speeds  
Logic Edge–Clocked Design — Incremented on Positive Transition of  
Clock or Negative Transition on Enable  
Capable of Driving Two Low–power TTL Loads or One Low–power  
Schottky TTL Load Over the Rated Temperature Range  
ORDERING INFORMATION  
MC14XXXBCP  
MC14XXXBCL  
MC14XXXBDW  
Plastic  
Ceramic  
SOIC  
•
T
A
= – 55° to 125°C for all packages.  
MAXIMUM RATINGS* (Voltages Referenced to V  
)
SS  
Symbol  
Parameter  
DC Supply Voltage  
Value  
Unit  
V
V
DD  
– 0.5 to + 18.0  
BLOCK DIAGRAM  
V , V  
Input or Output Voltage (DC or Transient)  
0.5 to V  
DD  
+ 0.5  
V
in out  
CLOCK  
1
I , I  
in out  
Input or Output Current (DC or Transient),  
per Pin  
± 10  
mA  
Q0  
3
4
5
6
Q1  
C
2
Q2  
P
D
Power Dissipation, per Package†  
Storage Temperature  
500  
mW  
C
ENABLE  
Q3  
R
T
stg  
– 65 to + 150  
260  
T
L
Lead Temperature (8–Second Soldering)  
C
7
* Maximum Ratings are those values beyond which damage to the device may occur.  
†Temperature Derating:  
CLOCK  
9
11  
12  
13  
14  
Q0  
Plastic “P and D/DW” Packages: – 7.0 mW/ C From 65 C To 125 C  
Ceramic “L” Packages: – 12 mW/ C From 100 C To 125 C  
Q1  
C
10  
Q2  
ENABLE  
Q3  
R
TRUTH TABLE  
Clock Enable Reset  
Action  
Increment Counter  
Increment Counter  
No Change  
15  
V
V
= PIN 16  
= PIN 8  
DD  
SS  
1
X
0
0
0
0
0
0
0
1
0
This device contains protection circuitry to  
guard against damage due to high static  
voltages or electric fields. However, pre-  
cautions must be taken to avoid applications of  
any voltage higher than maximum rated volt-  
ages to this high–impedance circuit. For proper  
operation, V and V  
to the range V  
Unused inputs must always be tied to an  
appropriatelogic voltage level (e.g., either V  
or V ). Unused outputs must be left open.  
DD  
X
No Change  
No Change  
1
No Change  
X
X
Q0 thru Q3 = 0  
should be constrained  
in  
out  
(V or V  
X = Don’t Care  
)
V
DD  
.
SS  
in out  
SS  
REV 3  
1/94  
Motorola, Inc. 1995  
1234567

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