HEF4538B View Datasheet(PDF) - NXP Semiconductors.
Part Name
Description
Manufacturer
HEF4538B Datasheet PDF : 18 Pages
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NXP Semiconductors
HEF4538B
Dual precision monostable multivibrator
Table 8. Dynamic characteristics …continued
VSS = 0 V; Tamb = 25 C; for test circuit see Figure 11.
Symbol Parameter
Conditions
VDD
trec
recovery time nCD to nA, nB;
see Figure 7
5V
10 V
15 V
trtrig
retrigger time nQ, nQ to nA, nB;
see Figure 7
5V
10 V
15 V
tW
pulse width
nA LOW; minimum width; 5 V
see Figure 7
10 V
15 V
nB HIGH;
minimum width;
see Figure 7
5V
10 V
15 V
nCD LOW;
minimum width;
see Figure 7
5V
10 V
15 V
nQ or nQ;
REXT = 100 k;
CEXT =2.0 nF;
see Figure 7
5V
10 V
15 V
nQ or nQ ;
REXT = 100 k;
CEXT = 0.1 F;
see Figure 7
5V
10 V
15 V
nQ or nQ;
REXT = 100 k;
CEXT = 10 F;
see Figure 7
5V
10 V
15 V
tW
pulse width
variation
nQ or nQ variation over
temperature range;
see Figure 8
5V
10 V
15 V
nQ or nQ variation over
VDD voltage range
5 V to 15 V; see Figure 9
REXT
external timing
resistor
nQ or nQ variation
between monostables in
the same device;
REXT = 100 k;
CEXT = 2 nF to 10 F
5V
10 V
15 V
CEXT
external timing
capacitor
Extrapolation formula[1] Min
-
-
-
0
0
0
90
30
24
50
24
20
55
25
20
218
213
211
Typ Max Unit
20 40 ns
10 20 ns
5 10 ns
-
-
ns
-
-
ns
-
-
ns
45 -
ns
15 -
ns
12 -
ns
25 -
ns
12 -
ns
10 -
ns
25 -
ns
12 -
ns
10 -
ns
230 242 s
224 235 s
223 234 s
10.3 10.8 11.3 ms
10.2 10.7 11.2 ms
10.1 10.6 11.1 ms
1.01 1.09
0.99 1.04
0.99 1.04
1.11 s
1.09 s
1.09 s
-
0.2 -
%
-
0.2 -
%
-
0.2 -
%
-
1.5 -
%
-
1 -
%
-
1 -
%
-
1 -
%
5-
[2]
k
2000 -
no
pF
limits
[1] The typical values of the propagation delay and transition times are calculated from the extrapolation formulas shown (CL in pF).
[2] The maximum permissible resistance REXT, which holds the specified accuracy of tW (nQ, nQ output), depends on the leakage current
of the capacitor CEXT and the leakage of the HEF4538B.
HEF4538B
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 8 — 16 November 2011
© NXP B.V. 2011. All rights reserved.
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