Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

DM74LS122 Datasheet(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. DM74LS122
Description  DM74LS122 Retriggerable 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 

DM74LS122 Datasheet(HTML) 3 Page - National Semiconductor (TI)

   
Zoom Inzoom in Zoom Outzoom out
 3 / 6 page
background image
Switching Characteristics at VCC e 5V and TA e 25 C (See Section 1 for Test Waveforms and Output Load)
RL e 2kX
Symbol
Parameter
From (Input)
CL e 15 pF
CL e 15 pF
Units
To (Output)
CEXT e 0 pF REXT e 5kX
CEXT e 1000 pF REXT e 10 kX
Min
Max
Min
Max
tPLH
Propagation Delay Time
A to Q
33
ns
Low to High Level Output
tPLH
Propagation Delay Time
B to Q
44
ns
Low to High Level Output
tPHL
Propagation Delay Time
A to Q
45
ns
High to Low Level Output
tPHL
Propagation Delay Time
B to Q
56
ns
High to Low Level Output
tPLH
Propagation Delay Time
Clear to Q
45
ns
Low to High Level Output
tPHL
Propagation Delay Time
Clear to Q
27
ns
High to Low Level Output
tWQ(Min)
Minimum Width of Pulse
A or B to Q
200
ns
at Output Q
tW(out)
Output Pulse Width
A or B to Q
4
5
m
s
Note 1
All typicals are at VCC e 5V TA e 25 C
Note 2
Not more than one output should be shorted at a time and the duration should not exceed one second
Note 3
Quiescent ICC is measured (after clearing) with 24V applied to all clear and A inputs B inputs grounded all outputs open CEXT e 002 mF and REXT e
25 kX
Note 4
ICC is measured in the triggered state with 24V applied to all clear and B inputs A inputs grounded all outputs open CEXT e 002 mF and REXT e 25 kX
Note 5
With all outputs open and 45V applied to all data and clear inputs ICC is measured after a momentary ground then 45V is applied to the clock
Note 6
TA e 25 C and VCC e 5V
Operating Rules
1 To use the internal 10 kX timing resistor connect the
RINT pin to VCC
2 An external resistor (RX) or the internal resistor (10 kX)
and an external capacitor (CX) are required for proper
operation The value of CX may vary from 0 to any neces-
sary value For small time constants use high-quality
mica glass polypropylene polycarbonate or polystyrene
capacitors For large time constants use solid tantalum or
special aluminum capacitors If the timing capacitors
have leakages approaching 100 nA or if stray capaci-
tance from either terminal to ground is greater than 50 pF
the timing equations may not represent the pulse width
the device generates
3 The pulse width is essentially determined by external tim-
ing components RX and CX For CX k 1000 pF see Fig-
ure 1 design curves on TW as function of timing compo-
nents value For CX ll 1000 pF the output is defined as
TW e KRXCX
where RX is in kX
CX is in pF
TW is in ns
K
037
TLF6385 – 2
FIGURE 1
3


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