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參數(shù)資料
| 型號(hào)： | TC74VHC221AFK |
| 廠商： | Toshiba Corporation |
| 英文描述： | Dual Monostable Multivibrator |
| 中文描述： | 雙單穩(wěn)態(tài)觸發(fā)器 |
| 文件頁數(shù)： | 3/15頁 |
| 文件大?。?/td> | 323K |
| 代理商： | TC74VHC221AFK |
TC74VHC123,221AF/AFN/AFT/AFK
2007-10-19
3
Block Diagram (Note 1) (Note 2)
Note 1: C
X
, R
X
, D
X
are external
Capacitor, resistor, and diode, respectively.
Note 2: External clamping diode, D
X
;
The external capacitor is charged to V
CC
level in the wait state, i.e. when no trigger is applied.
If the supply voltage is turned off, C
X
is discharges mainly through the internal (parasitic) diode. If C
X
is
sufficiently large and V
CC
drops rapidly, there will be some possibility of damaging the IC through in rush
current or latch-up. If the capacitance of the supply voltage filter is large enough and V
CC
drops slowly, the
in rush current is automatically limited and damage to the IC is avoided.
The maximum value of forward current through the parasitic diode is
±
20 mA.
In the case of a large C
X
, the limit of fall time of the supply voltage is determined as follows:
t
f
≥
(V
CC
0.7) C
X
/20 mA
(t
f
is the time between the supply voltage turn off and the supply voltage reaching 0.4 V
CC
.)
In the even a system does not satisfy the above condition, an external clamping diode (D
X
) is needed to
protect the IC from rush current.
C
X
1
2
13
4
14
15
D
X
V
CC
R
X
C
X
R
X
/C
X
3
CLR
A
B
Q
Q
C
X
9
10
5
12
6
7
D
X
V
CC
R
X
C
X
R
X
/C
X
11
CLR
A
B
Q
Q
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TC74VHC221AFK(EL,K | 制造商:Toshiba America Electronic Components 功能描述:Logic,TC74VHC,MonoStable Multivbrtr,US16 |
| TC74VHC221AFN | 制造商:Toshiba America Electronic Components 功能描述:MONOSTABLE MULTIVIBRATOR DUAL 16PIN SOL - Tape and Reel |
| TC74VHC221-AFT | 制造商:Toshiba America Electronic Components 功能描述: |
| TC74VHC221AFT(EK2M | 功能描述:單穩(wěn)態(tài)多諧振蕩器 CMOS LOGIC IC STD LOGIC IC’S RoHS:否 制造商:Texas Instruments 每芯片元件:1 邏輯系列:LVC 邏輯類型:Monostable Multivibrator 封裝 / 箱體:SSOP-8 傳播延遲時(shí)間:18.6 ns 高電平輸出電流:- 32 mA 低電平輸出電流:32 mA 電源電壓-最大:5.5 V 電源電壓-最小:1.65 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel |
| TC74VHC221AFT(EL,K | 制造商:Toshiba America Electronic Components 功能描述:Logic,C-MOS,74VHC,TC74VHC221AFT |
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