Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

54121 Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. 54121
Description  One-Shot with Clear and Complementary Outputs
Download  6 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
Logo 

54121 Datasheet(HTML) 1 Page - National Semiconductor (TI)

   
Zoom Inzoom in Zoom Outzoom out
 1 / 6 page
background image
TLF6538
June 1989
54121DM54121DM74121 One-Shot with
Clear and Complementary Outputs
General Description
The DM5474121 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 voltsecond A high immunity to
VCC noise of typically 15V is also provided by internal cir-
cuitry at the input stage
To obtain optimum and trouble free operation please read
operating rules and NSC one-shot application notes careful-
ly and observe recommendations
Features
Y
Triggered from active-high transition or active-low tran-
sition inputs
Y
Variable pulse width from 30 ns to 28 seconds
Y
Jitter free Schmitt-trigger input
Y
Excellent noise immunity typically 12V
Y
Stable pulse width up to 90% duty cycle
Y
TTL DTL compatible
Y
Compensated for VCC and temperature variations
Y
Input clamp diodes
Y
Alternate MilitaryAerospace device (54121) is avail-
able Contact a National Semiconductor Sales Office
Distributor for specifications
Functional Description
The basic output pulse width is determined by selection of
an internal resistor RINT or an external resistor (RX) and
capacitor (CX) 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
RX and CX combinations There are three trigger inputs from
the device two negative edge-triggering (A) inputs one pos-
itive edge Schmitt-triggering (B) input
Connection Diagram
Dual-In-Line Package
TLF6538 – 1
Order Number 54121DMQB 54121FMQB
DM54121J DM54121W or DM74121N
See NS Package Number J14A N14A or W14B
Function Table
Inputs
Outputs
A1
A2
B
Q
Q
LX
H
L
H
XL
H
L
H
XX
L
L
H
HH
X
L
H
H
v
H
v
HH
vv
H
LX
u
XL
u
H
e
High Logic Level
L
e
Low Logic Level
X
e
Can Be Either Low or High
u e Positive Going Transition
v e Negative Going Transition
e
A Positive Pulse
e
A Negative Pulse
C1995 National Semiconductor Corporation
RRD-B30M105Printed in U S A


Html Pages

1  2  3  4  5  6 


Datasheet Download




Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ]  

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Alldatasheet API   |   Link Exchange   |   Manufacturer List
All Rights Reserved© Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn