voltage timing application. An external resistor (R
X
)
and an external capacitor (C
X
) control the timing and
accuracy for the circuit. Adjustment of R
X
and C
X
provides a wide range of output pulse widths from
the Q and Q terminals. The time delay from trigger
input to output transition (trigger propagation delay)
and the time delay from reset input to output transi-
tion (reset propagation delay) are independent of R
X
and C
X
. Precision control of output pulse widths is
achieved through linear CMOS techniques. Lead-
ing-edge-triggering (+ TR) and trailing-edge-trigger-
ing (– TR) inputs are provided for triggering from
either edge of an input pulse. An unused + TR input
should be tied to V
SS
. An unused – TR input should
be tied to V
DD
. A RESET (on low level) is provided
for immediate termination of the output pulse or to
September 1988
PIN CONNECTIONS
1/14
HCC/HCF4538B
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, its inputs must be tied to either V
DD
or V
SS
(see table 1). In normal operation the circuit triggers
(extends the output pulse one period) on the appli-
cation of each new trigger pulse. For operation in the
non-retriggerable mode, Q is connected to – TR
FUNCTIONAL DIAGRAM
when leading-edge triggering (+ TR) is used or Q is
connected to + TR when trailingedge triggering (–
TR) is used. The time period (T) for this multivibrator
can be calculated by : T = R
X
C
X
. The min. value of
external resistance, R
X
, is 4KΩ. The max. and min.
values of external capacitance, C
X
, are 100µF and
5nF, respectively.
ABSOLUTE MAXIMUM RATING
Symbol
V
DD
*
V
i
I
I
P
tot
Parameter
Supply Voltage:
HCC
Types
HCF
Types
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
HCF
Types
Storage Temperature
Value
-0.5 to +20
-0.5 to +18
-0.5 to V
DD
+ 0.5
±
10
200
100
-55 to +125
-40 to +85
-65 to +150
Unit
V
V
V
mA
mW
mW
o
o
T
op
T
stg
C
C
o
C
Stresses above those listed under ”Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress ratingonly and functional
operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure
to absolute maximum rating conditions for external periods may affect device reliability.
* All voltage values are referred to V
SS
pin voltage.
RECOMMENDED OPERATING CONDITIONS
Symbol
V
DD
V
I
T
op
Parameter
Supply Voltage:
HCC
Types
HCF
Types
Input Voltage
Operating Temperature:
HCC
Types
HCF
Types
Value
3 to 18
3 to 15
0 to V
DD
-55 to +125
-40 to +85
Unit
V
V
V
o
o
C
C
2/14
HCC/HCF4538B
LOGIC DIAGRAM
(1/2 of device shown)
TABLE 1:
Functional Terminal Connections
V
DD
to Term. NO
Function
Mono
(1)
Leading-Edge
Trigger/Retriggerable
Leading-Edge
Trigger/Non-retriggerable
Trailing-Edge
Trigger/Retriggerable
Trailing-Edge
Trigger/Non-retriggerable
3, 5
3
3
3
Mono
(2)
11, 13
13
13
13
4
12
Mono
(1)
Mono
(2)
V
SS
to Term. NO
Input Pulse to
Term. No
Mono
(1)
4
4
5
5
Mono
(2)
12
12
11
11
4, 6
12, 10
5, 7
11, 9
Other
Connections
Mono
(1)
Mono
(2)
Notes :
1. A Retriggerable one-shot multivibrator has an output pulse width which is extended on full time period (T) after application of the last
trigger pulse.
2. A Non-retriggerable one-shot multivibrator has a time period (T) referenced from the application of the first trigger pulse.
Pulse Width
3/14
HCC/HCF4538B
STATIC ELECTRICAL CHARACTERISTICS
(over recommended operating conditions)
Test Conditios
Symbol
I
L
Parameter
Quiescent
Current
V
I
(V)
0/5
HCC
Types
0/10
0/15
0/20
HCF
Types
V
OH
Output High
Voltage
Output Low
Voltage
Input High
Voltage
Input Low
Voltage
Output
Drive
Current
0/5
HCC
Types
0/5
0/10
0/15
0/5
HCF
Types
0/5
0/10
0/15
I
OL
Output
Sink
Current
HCC
Types
HCF
Types
I
IH
, I
IL
C
I
o
Value
T
LOW
*
Min. Max.
5
10
20
100
5
10
20
4.95
9.95
14.95
0.05
0.05
0.05
3.5
7
11
1.5
3
4
-2
-0.64
-1.6
-4.2
-1.8
-0.61
-1.5
-4
0.64
1.6
4.2
0.61
1.5
3.6
±0.1
-1.6
-0.51
-1.3
-3.4
-1.6
-0.51
-1.3
-3.4
0.51
1.3
3.4
0.51
1.3
3.4
-3.2
-1
-2.6
-6.8
-3.2
-1
-2.6
-6.8
1
2.6
6.8
1
2.6
6.8
±10
-5
5
±0.1
7.5
3.5
7
11
1.5
3
4
-1.15
-0.36
-0.9
-2.4
-1.3
-0.42
-1.1
-2.8
0.36
0.9
2.4
0.42
1.1
2.8
±1
µA
pF
mA
mA
4.95
9.95
14.95
25
o
C
Min. Typ. Max.
0.04
0.04
0.04
0.08
0.04
0.04
0.04
5
10
15
0.05
0.05
0.05
3.5
7
11
1.5
3
4
V
V
5
10
20
100
5
10
20
4.95
9.95
14.95
0.05
0.05
0.05
V
V
T
HIGH
*
Min. Max.
150
300
600
3000
150
300
600
µA
Unit
V
O
(V)
|I
O
| V
DD
(µA) (V)
5
10
15
20
5
10
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
15
5
10
15
5
10
15
5
10
15
5
10
15
5
5
10
15
5
5
10
15
5
10
15
5
10
15
18
0/5
0/10
0/15
0/5
0/10
0/15
5/0
10/0
15/0
0.5/4.5
1/9
1.5/13.5
4.5/0.5
9/1
13.5/1.5
2.5
4.6
9.5
13.5
2.5
4.6
9.5
13.5
0.4
0.5
1.5
0.4
0.5
1.5
Any Input
Any Input
V
OL
V
IH
V
IL
I
OH
0/5
0/10
0/15
0/5
0/10
0/15
Input Leakage
Current
Input Capacitance
o
0/18
* T
LOW
= -55 C for
HCC
device: -40 C for
HCF
device.
* T
HIGH
= +125
o
C for
HCC
device: +85
o
C for
HCF
device.
The Noise Margin for both ”1” and ”0” level is: 1V min. with V
DD
= 5 V, 2 V min. with V
DD
= 10 V, 2.5 V min. with V
DD
= 15 V
4/14
HCC/HCF4538B
DYNAMIC ELECTRICAL CHARACTERISTICS
(T
amb
= 25
o
C, C
L
= 50 pF, R
L
= 200 KΩ,
o
typical temperature coefficent for all V
DD
values is 03 %/ C, all input rise and fall times= 20 ns)
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