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MC14521B PDF预览

MC14521B

更新时间: 2024-11-03 22:58:11
品牌 Logo 应用领域
安森美 - ONSEMI /
页数 文件大小 规格书
12页 223K
描述
24-Stage Frequency Divider

MC14521B 数据手册

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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  
24  
previous flip–flop by two, consequently this part will count up to 2  
=
http://onsemi.com  
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.  
MARKING  
DIAGRAMS  
16  
All Stages are Resettable  
Reset Disables the RC Oscillator for Low Standby Power Drain  
PDIP–16  
P SUFFIX  
CASE 648  
MC14521BCP  
AWLYYWW  
RC and Crystal Oscillator Outputs Are Capable of Driving External  
Loads  
1
Test Mode to Reduce Test Time  
16  
V and V Pins Brought Out on Crystal Oscillator Inverter to  
DD  
SS  
SOIC–16  
D SUFFIX  
CASE 751B  
Allow the Connection of External Resistors for Low–Power  
Operation  
14521B  
AWLYWW  
Supply Voltage Range = 3.0 Vdc to 18 Vdc  
1
Capable of Driving Two Low–power TTL Loads or One Low–power  
16  
Schottky TTL Load over the Rated Temperature Range.  
SOEIAJ–16  
F SUFFIX  
CASE 966  
MC14521B  
AWLYWW  
1
MAXIMUM RATINGS (Voltages Referenced to V ) (Note 2.)  
SS  
A
= Assembly Location  
Symbol  
Parameter  
Value  
Unit  
V
WL or L = Wafer Lot  
YY or Y = Year  
V
DD  
DC Supply Voltage Range  
0.5 to +18.0  
WW or W = Work Week  
V , V  
in out  
Input or Output Voltage Range  
(DC or Transient)  
0.5 to V + 0.5  
V
DD  
I , I  
in out  
Input or Output Current  
(DC or Transient) per Pin  
±10  
mA  
ORDERING INFORMATION  
Device  
Package  
PDIP–16  
SOIC–16  
Shipping  
P
Power Dissipation,  
per Package (Note 3.)  
500  
mW  
D
MC14521BCP  
MC14521BD  
2000/Box  
48/Rail  
T
A
Ambient Temperature Range  
Storage Temperature Range  
55 to +125  
65 to +150  
260  
°C  
°C  
°C  
T
stg  
MC14521BDR2  
SOIC–16 2500/Tape & Reel  
T
Lead Temperature  
L
MC14521BF  
SOEIAJ–16  
SOEIAJ–16  
SOEIAJ–16  
See Note 1.  
See Note 1.  
See Note 1.  
(8–Second Soldering)  
2. Maximum Ratings are those values beyond which damage to the device  
may occur.  
3. Temperature Derating:  
MC14521BFEL  
MC14521BFR2  
Plastic “P and D/DW” Packages: – 7.0 mW/ C From 65 C To 125 C  
1. For ordering information on the EIAJ version of  
the SOIC packages, please contact your local  
ON Semiconductor representative.  
This device contains protection circuitry to guard against damage due to high  
static voltages or electric fields. However, precautions must be taken to avoid  
applications of any voltage higher than maximum rated voltages to this  
high–impedancecircuit. For proper operation, V and V should be constrained  
in  
out  
to the range V  
(V or V  
)
V
DD  
.
SS  
in  
out  
Unused inputs must always be tied to an appropriate logic voltage level (e.g.,  
either V or V ). Unused outputs must be left open.  
SS  
DD  
Semiconductor Components Industries, LLC, 2000  
1
Publication Order Number:  
March, 2000 – Rev. 3  
MC14521B/D  

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