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M74HC221TTR PDF预览

M74HC221TTR

更新时间: 2024-11-02 05:00:55
品牌 Logo 应用领域
意法半导体 - STMICROELECTRONICS 振荡器
页数 文件大小 规格书
14页 374K
描述
DUAL MONOSTABLE MULTIVIBRATOR

M74HC221TTR 数据手册

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M74HC221  
DUAL MONOSTABLE MULTIVIBRATOR  
HIGH SPEED :  
= 24 ns (TYP.) at V = 6V  
LOW POWER DISSIPATION:  
STAND BY STATE :  
t
PD  
CC  
I
=4µA (MAX.) at T =25°C  
CC  
A
ACTIVE STATE :  
=700µA (MAX.) at V = 5V  
I
DIP  
SOP  
TSSOP  
T & R  
CC  
CC  
HIGH NOISE IMMUNITY:  
= V = 28 % V (MIN.)  
V
NIH  
NIL  
CC  
SYMMETRICAL OUTPUT IMPEDANCE:  
|I | = I = 4mA (MIN)  
ORDER CODES  
PACKAGE  
OH  
OL  
TUBE  
BALANCED PROPAGATION DELAYS:  
DIP  
SOP  
M74HC221B1R  
M74HC221M1R  
t
t
PLH  
PHL  
M74HC221RM13TR  
M74HC221TTR  
WIDE OPERATING VOLTAGE RANGE:  
(OPR) = 2V to 6V  
TSSOP  
V
CC  
WIDE OUTPUT PULSE WIDTH RANGE :  
= 150 ns ~ 60 s OVER AT V = 4.5 V  
PIN AND FUNCTION COMPATIBLE WITH  
74 SERIES 221  
t
WOUT  
CC  
triggering  
the  
output  
maintains  
the  
MONOSTABLE STATE for the time period  
determined by the external resistor Rx and  
capacitor Cx. Taking CLR low breaks this  
MONOSTABLE STATE. If the next trigger pulse  
occurs during the MONOSTABLE period it makes  
the MONOSTABLE period longer.  
DESCRIPTION  
The M74HC221 is an high speed CMOS  
MONOSTABLE MULTIVIBRATOR fabricated with  
2
Limit for values of Cx and Rx :  
silicon gate C MOS technology.  
Cx : NO LIMIT  
There are two trigger inputs, A INPUT (negative  
edge) and B INPUT (positive edge).  
Rx : V < 3.0V 5Kto 1MΩ  
cc  
V
0.7  
> 3.0V 1Kto 1MΩ  
Triggering on the B input occurs at a particular  
voltage threshold and is not related to rise and fall  
time of the applied pulse. The device may also be  
trigger by using the CLR input (positive edge)  
because of the Schimtt-trigger input; after  
cc  
K
All inputs are equipped with protection circuits  
against static discharge and transient excess  
voltage.  
PIN CONNECTION AND IEC LOGIC SYMBOLS  
July 2001  
1/14  

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