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
(1)
nB input
(3)
nA input
nCD input
nREXT/CEXT input
Vref1
Vref2
nQ output
T
T
(5)
(1) Positive edge triggering.
(2) Positive edge re-triggering (pulse lengthening).
(3) Negative edge triggering.
(4) Reset (pulse shortening).
(5) T = REXT CEXT.
Fig 4. Timing diagram
(1)
(2)
(1)
(4)
Vref1
Vref2
T
001aae737
CEXT
REXT
VDD
nCEXT
nREXT/CEXT
nQ
T
nA
T = REXT × CEXT
nB
nQ
nCD
001aae735
Fig 5. Connection of the external timing components REXT and CEXT
7. Limiting values
Table 4. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to VSS = 0 V (ground)
Symbol
Parameter
Conditions
Min
Max
Unit
VDD
supply voltage
0.5
+18
V
IIK
input clamping current
VI < 0.5 V or VI > VDD + 0.5 V
-
10
mA
VI
input voltage
0.5
VDD + 0.5 V
IOK
output clamping current
VI < 0.5 V or VI > VDD + 0.5 V
-
10
mA
II/O
input/output current
-
10
mA
IDD
supply current
Tstg
storage temperature
-
50
mA
65
+150
C
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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