HEF4538B(2009) View Datasheet(PDF) - NXP Semiconductors.
Part Name
Description
MFG CO.
HEF4538B Datasheet PDF : 17 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 kΩ;
CEXT =2.0 nF;
see Figure 7
5V
10 V
15 V
nQ or nQ ;
REXT = 100 kΩ;
CEXT = 0.1 µF;
see Figure 7
5V
10 V
15 V
nQ or nQ;
REXT = 100 kΩ;
CEXT = 10 µF;
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 kΩ;
CEXT = 2 nF to 10 µF
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 µs
224 235 µs
223 234 µs
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 ms
1.09 ms
1.09 ms
-
±0.2 -
%
-
±0.2 -
%
-
±0.2 -
%
-
±1.5 -
%
-
±1 -
%
-
±1 -
%
-
±1 -
%
5-
2000 -
[2]
kΩ
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_6
Product data sheet
Rev. 06 — 2 November 2009
© NXP B.V. 2009. All rights reserved.
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