
FUNCTIONAL DIAGRAM
ABSOLUTE MAXIMUM RATING
Symbol
V
DD
*
Parameter
Value
-0.5 to +20
-0.5 to +18
-0.5 to V
DD
+ 0.5
±
10
200
Unit
V
V
V
mA
mW
Supply Voltage:
HCC
Types
HCF
Types
V
i
I
I
P
tot
Input Voltage
DC Input Current (any one input)
Total Power Dissipation (per package)
Dissipation per Output Transistor
for Top = Full Package Temperature Range
Operating Temperature:
HCC
Types
100
mW
o
C
o
C
o
C
T
op
HCF
Types
-55 to +125
-40 to +85
-65 to +150
T
stg
Storage Temperature
Stressesabove thoselistedunder ”Absolute Maximum Ratings”maycausepermanent damagetothedevice. Thisisastressratingonly and functional
operation ofthe device at these or any otherconditions above thoseindicated in theoperational sections of thisspecification isnotimplied.Exposure
to absolute maximum ratingconditions forexternal periods may affect device reliability.
* Allvoltage values are referred to V
SS
pinvoltage.
RECOMMENDED OPERATING CONDITIONS
Symbol
V
DD
Parameter
Value
3 to 18
3 to 15
0 to V
DD
-55 to +125
-40 to +85
Unit
V
V
V
o
C
o
C
Supply Voltage:
HCC
Types
HCF
Types
V
I
T
op
Input Voltage
Operating Temperature:
HCC
Types
HCF
Types
prevent output pulses when power is turned on. An
unused RESET input should be tied to V
DD
. How-
ever, if an entire section of the
HCC/HCF4538B
is
not used,itsinputs mustbe tied to eitherV
DD
or V
SS
(see table 1). In normal operation thecircuit triggers
(extends the output pulse one period) on the appli-
cationofeach new triggerpulse. Foroperation inthe
non-retriggerable mode, Q is connected to – TR
when leading-edge triggering (+ TR) is used or Q is
connected to + TR when trailingedge triggering (–
TR)isused.The timeperiod (T) for this multivibrator
can be calculated by : T = R
X
C
X
. The min. value of
external resistance, R
X
, is4K
. The max. and min.
values of external capacitance, C
X
, are 100
μ
F and
5nF,respectively.
HCC/HCF4538B
2/14