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MC14521B PDF预览

MC14521B

更新时间： 2024-09-09 04:59:27
品牌 Logo 应用领域
摩托罗拉 - MOTOROLA 驱动器
页数 文件大小 规格书
8页 266K
描述
24-Stage Frequency Driver

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中文翻译

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MC14521B 数据手册

 浏览型号MC14521B的Datasheet PDF文件第2页浏览型号MC14521B的Datasheet PDF文件第3页浏览型号MC14521B的Datasheet PDF文件第4页浏览型号MC14521B的Datasheet PDF文件第5页浏览型号MC14521B的Datasheet PDF文件第6页浏览型号MC14521B的Datasheet PDF文件第7页 
SEMICONDUCTOR TECHNICAL DATA  
L SUFFIX  
CERAMIC  
CASE 620  
The MC14521B consists of a chain of 24 flip–flops with an input circuit that  
allows three modes of operation. The input will function as a crystal  
oscillator, an RC oscillator, or as an input buffer for an external oscillator.  
Each flip–flop divides the frequency of the previous flip–flop by two,  
consequently this part will count up to 2 = 16,777,216. The count advances  
on the negative going edge of the clock. The outputs of the last  
seven–stages are available for added flexibility.  
24  
P SUFFIX  
PLASTIC  
CASE 648  
•
•
•
All Stages are Resettable  
Reset Disables the RC Oscillator for Low Standby Power Drain  
RC and Crystal Oscillator Outputs Are Capable of Driving External  
Loads  
D SUFFIX  
SOIC  
•
•
Test Mode to Reduce Test Time  
CASE 751B  
V
′ and V ′ Pins Brought Out on Crystal Oscillator Inverter to Allow  
SS  
DD  
ORDERING INFORMATION  
the Connection of External Resistors for Low–Power Operation  
MC14XXXBCP  
MC14XXXBCL  
MC14XXXBD  
Plastic  
Ceramic  
SOIC  
•
•
Supply Voltage Range = 3.0 Vdc to 18 Vdc  
Capable of Driving Two Low–power TTL Loads or One Low–power  
Schottky TTL Load over the Rated Temperature Range.  
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
– 0.5 to + 18.0  
DD  
V , V  
PIN ASSIGNMENT  
Input or Output Voltage (DC or Transient)  
– 0.5 to V  
DD  
+ 0.5  
V
in out  
Q24  
RESET  
1
2
16  
15  
V
DD  
I , I  
in out  
Input or Output Current (DC or Transient),  
per Pin  
± 10  
mA  
Q23  
P
D
Power Dissipation, per Package†  
Storage Temperature  
500  
mW  
C
V
′
3
4
5
6
7
8
14  
13  
12  
11  
10  
9
Q22  
Q21  
Q20  
Q19  
Q18  
IN 1  
SS  
OUT 2  
T
stg  
– 65 to + 150  
260  
T
L
Lead Temperature (8–Second Soldering)  
C
V
′
DD  
* Maximum Ratings are those values beyond which damage to the device may occur.  
†Temperature Derating:  
IN 2  
OUT 1  
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  
V
SS  
BLOCK DIAGRAM  
RESET  
2
Output  
Count Capacity  
18  
2
19  
2
20  
2
21  
2
22  
2
23  
2
24  
2
Q18  
Q19  
Q20  
Q21  
Q22  
Q23  
Q24  
= 262,144  
= 524,288  
STAGES  
1 THRU 17  
STAGES  
18 THRU 24  
Q18 Q19 Q20 Q21 Q22 Q23 Q24  
= 1,048,576  
= 2,097,152  
= 4,194,304  
= 8,388,608  
= 16,777,216  
9
IN 1  
6
IN 2  
V
V
= PIN 16  
= PIN 8  
DD  
SS  
5
DD  
4
3
7
10 11 12 13 14 15  
1
V
′
OUT2  
OUT 1  
V
′
SS  
REV 3  
1/94  
Motorola, Inc. 1995  
12345678

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