Datasheet > DM54121

DM54121

更新时间： 2024-11-14 23:47:15

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DM54121 数据手册

June 1989

54121/DM54121/DM74121 One-Shot with

Clear and Complementary Outputs

Jitter free Schmitt-trigger input

General Description

Excellent noise immunity typically 1.2V

Stable pulse width up to 90% duty cycle

TTL, DTL compatible

The DM54/74121 is a monostable multivibrator featuring

both positive and negative edge triggering with complemen-

tary outputs. An internal 2kX timing resistor is provided for

design convenience minimizing component count and lay-

out problems. This device can be used with a single external

capacitor. Inputs (A) are active-low trigger transition inputs

and input (B) is an active-high transition Schmitt-trigger in-

put that allows jitter-free triggering from inputs with tran-

sition rates as slow as 1 volt/second. A high immunity to

Compensated for V

Input clamp diodes

and temperature variations

Alternate Military/Aerospace device (54121) is avail-

able. Contact a National Semiconductor Sales Office/

Distributor for specifications.

noise of typically 1.5V is also provided by internal cir-

cuitry at the input stage.

Functional Description

The basic output pulse width is determined by selection of

To obtain optimum and trouble free operation please read

operating rules and NSC one-shot application notes careful-

ly and observe recommendations.

an internal resistor R or an external resistor (R ) and

INT

capacitor (C ). Once triggered the output pulse width is in-

dependent of further transitions of the inputs and is a func-

tion of the timing components. Pulse width can vary from a

few nano-seconds to 28 seconds by choosing appropriate

Features

and C combinations. There are three trigger inputs from

Triggered from active-high transition or active-low tran-

sition inputs

the device, two negative edge-triggering (A) inputs, one pos-

itive edge Schmitt-triggering (B) input.

Variable pulse width from 30 ns to 28 seconds

Connection Diagram

Function Table

Inputs

Outputs

Dual-In-Line Package

High Logic Level

Low Logic Level

Can Be Either Low or High

Positive Going Transition

Negative Going Transition

A Positive Pulse

TL/F/6538–1

Order Number 54121DMQB, 54121FMQB,

DM54121J, DM54121W or DM74121N

A Negative Pulse

See NS Package Number J14A, N14A or W14B

1995 National Semiconductor Corporation

TL/F/6538

RRD-B30M105/Printed in U. S. A.

12 3 4 5 6

中文翻译

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与DM54121相关器件

型号	品牌	获取价格	描述	数据表
DM54121J	NSC	获取价格	One-Shot with Clear and Complementary Outputs
DM54121J/883	TI	获取价格	TTL/H/L SERIES, MONOSTABLE MULTIVIBRATOR, CDIP14, CERAMIC, DIP-14
DM54121J/883B	NSC	获取价格	IC 54 SERIES, MONOSTABLE MULTIVIBRATOR, CDIP14, CERAMIC, DIP-14, Prescaler/Multivibrator
DM54121J/883B	ROCHESTER	获取价格	Monostable Multivibrator, 54 Series, 1-Func, TTL, CDIP14, CERAMIC, DIP-14
DM54121J/883C	NSC	获取价格	IC 54 SERIES, MONOSTABLE MULTIVIBRATOR, CDIP14, CERAMIC, DIP-14, Prescaler/Multivibrator
DM54121J-MIL	ROCHESTER	获取价格	Monostable Multivibrator
DM54121J-MIL	NSC	获取价格	IC,MONOSTABLE MULTIVIBRATOR,STD-TTL,DIP,14PIN,CERAMIC
DM54121W	NSC	获取价格	One-Shot with Clear and Complementary Outputs
DM54121W/883	ROCHESTER	获取价格	Monostable Multivibrator, TTL/H/L Series, 1-Func, TTL, CDFP14, W14B
DM54121W/883C	NSC	获取价格	IC,MONOSTABLE MULTIVIBRATOR,STD-TTL,FP,14PIN,CERAMIC

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