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參數(shù)資料
| 型號(hào)： | 54122FMQB |
| 元件分類： | 通用總線功能 |
| 英文描述： | Dual/Triple Ultra-Low-Voltage SOT23 µP Supervisory Circuits |
| 中文描述： | 單穩(wěn)態(tài)觸發(fā)器 |
| 文件頁(yè)數(shù)： | 1/6頁(yè) |
| 文件大小： | 125K |
| 代理商： | 54122FMQB |
TL/F/10212
5
June 1989
54122/DM74122
Retriggerable Resettable Multivibrator
General Description
The ’122 features positive and negative DC level triggering
inputs, complementary outputs, an optional 10 k
X
internal
timing resistor and an overriding Direct Clear (C
D
) input.
When the circuit is in the quasi-stable (delay) state, another
trigger applied to the inputs (per Truth Table) will cause the
delay period to start again, without disturbing the outputs.
This process can be repeated indefinitely and thus the out-
put pulse period (Q HIGH, Q LOW) can be made as long as
desired. Alternatively, a delay period can be terminated
by a LOW signal applied to C
D
, which also prevents trigger-
ing. An internal connection from C
D
to the input gate makes
it possible to trigger the circuit by a positive-going signal on
C
D
, as shown in the Truth Table. For timing capacitor values
greater than 1000 pF, the output pulse width is defined as
follows:
t
w
e
0.32 R
X
C
X
(1.0
a
0.7/R
X
)
Where t
w
is in ns, R
X
is in k
X
and C
X
is in pF.
Connection Diagram
Dual-In-Line Package
TL/F/10212–1
Order Number 54122DMQB, 54122FMQB or DM74122N
See NS Package Number J14A, N14A or W14B
Logic Symbol
TL/F/10212–2
V
CC
e
Pin 14
GND
e
Pin 7
NC
e
Pins 10 and 12
Pin Names
Description
A
1
, A
2
B
1
, B
2
C
D
Q, Q
Trigger Inputs (Active Falling Edge)
Trigger Inputs (Active Rising Edge)
Direct Clear Inputs (Active LOW)
Outputs
C
1995 National Semiconductor Corporation
RRD-B30M105/Printed in U. S. A.
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| 54122-TB | 制造商:Thomas & Betts 功能描述:700 CU. STD. BRL. 1 HOLE 5/8" BOLT 制造商:Thomas & Betts 功能描述:Lug Terminal (9.2/0)AWG 93.5mm 46.7mm Electro-Tin |
| 54122UB | 制造商:Thomas & Betts 功能描述:54122TB 90 DEGREE BEND |
| 54122UF | 制造商:Thomas & Betts 功能描述:700 CU. STD. BRL. 1 HOLE 5/8 45 |
| 54122W/B | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| 54123 | 制造商:Brady Corporation 功能描述: 制造商:Greenlee Textron Inc 功能描述: 制造商:Woodhead Molex 功能描述: |
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