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參數(shù)資料
| 型號： | DM74121N |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 諧振器 |
| 英文描述： | One-Shot with Clear and Complementary Outputs |
| 中文描述： | TTL/H/L SERIES, MONOSTABLE MULTIVIBRATOR, PDIP14 |
| 封裝： | 0.300 INCH, PLASTIC, MS-001, DIP-14 |
| 文件頁數(shù)： | 1/5頁 |
| 文件大?。?/td> | 69K |
| 代理商： | DM74121N |
1999 Fairchild Semiconductor Corporation
DS006538
www.fairchildsemi.com
June 1989
Revised November 1999
D
DM74121
One-Shot with Clear and Complementary Outputs
General Description
The DM74121 is a monostable multivibrator featuring both
positive and negative edge triggering with complementary
outputs. An internal 2k
timing resistor is provided for
design convenience minimizing component count and lay-
out problems. this device can be used with a single exter-
nal capacitor. Inputs (A) are active-LOW trigger transition
inputs and input (B) is and active-HIGH transition Schmitt-
trigger input that allows jitter-free triggering from inputs with
transition rates as slow as 1 volt/second. A high immunity
to V
CC
noise of typically 1.5V is also provided by internal
circuitry at the input stage.
To obtain optimum and trouble free operation please read
operating rules and one-shot application notes carefully
and observe recommendations.
Features
I
Triggered from active-HIGH transition or active-LOW
transition inputs
I
Variable pulse width from 30 ns to 28 seconds
I
Jitter free Schmitt-trigger input
I
Excellent noise immunity typically 1.2V
I
Stable pulse width up to 90% duty cycle
I
TTL, DTL compatible
I
Compensated for V
CC
and temperature variations
I
Input clamp diodes
Ordering Code:
Connection Diagram
Function Table
H
=
HIGH Logic Level
L
=
LOW Logic Level
X
=
Can Be Either LOW or HIGH
=
A Positive Pulse
=
A Negative Pulse
↑
=
Positive Going Transition
↓
=
Negative Going Transition
Functional Description
The basic output pulse width is determined by selection of
an internal resistor R
INT
or an external resistor (R
X
) and
capacitor (C
X
). Once triggered the output pulse width is
independent of further transitions of the inputs and is func-
tion of the timing components. Pulse width can vary from a
few nano-seconds to 28 seconds by choosing appropriate
R
X
and C
X
combinations. There are three trigger inputs
from the device, two negative edge-triggering (A) inputs,
one positive edge Schmitt-triggering (B) input.
Order Number
DM74121N
Package Number
N14A
Package Description
14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Inputs
Outputs
A1
L
X
X
H
H
↓
↓
L
X
A2
X
L
X
H
↓
H
↓
X
L
B
H
H
L
X
H
H
H
↑
↑
Q
L
L
L
L
Q
H
H
H
H
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| DM74123 | Dual Retriggerable One-Shot with Clear and Complementary Outputs |
| DM74123N | Dual Retriggerable One-Shot with Clear and Complementary Outputs |
| DM74145 | BCD to Decimal Decoders/Drivers |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| DM74121N/A+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Monostable Multivibrator |
| DM74121N/B+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Monostable Multivibrator |
| DM74122 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Retriggerable Resettable Multivibrator |
| DM74123 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:DUAL RETRIGGERABLE ONE-SHOP WITH CLEAR AND COMPLEMENTARY OUTPUTS |
| DM74123J/A+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Monostable Multivibrator |
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