HEF4538BP,652(2009) View Datasheet(PDF) - NXP Semiconductors.
Part Name
Description
MFG CO.
HEF4538BP,652 Datasheet PDF : 17 Pages
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NXP Semiconductors
HEF4538B
Dual precision monostable multivibrator
6.2 Pin description
Table 2. Pin description
Symbol
1CEXT, 2CEXT
1REXT/CEXT, 2REXT/CEXT
1CD, 2CD
1B, 2B
1A, 2A
1Q, 2Q
1Q, 2Q
VSS
VDD
Pin
1, 15
2, 14
3, 13
4, 12
5, 11
6, 10
7, 9
8
16
Description
external capacitor connection (always connected to ground)
external capacitor/resistor connection
direct reset input (active LOW)
input (LOW-to-HIGH triggered)
input (HIGH-to-LOW triggered)
output
complementary output (active LOW)
ground supply voltage
supply voltage
7. Functional description
Table 3.
Inputs
nA
↓
Function table
nB
L
nCD
H
Outputs
nQ
nQ
H
↑
H
X
X
L
L
H
[1] H = HIGH voltage level; L = LOW voltage level; X = don’t care;
↑ = positive-going transition; ↓ = negative-going transition;
= one HIGH level output pulse, with the pulse width determined by CEXT and REXT;
= one LOW level output pulse, with the pulse width determined by CEXT and REXT.
HEF4538B_6
Product data sheet
Rev. 06 — 2 November 2009
© NXP B.V. 2009. All rights reserved.
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