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MC14538BDWR2G

P1-P3P4-P6P7-P9P10-P12P13-P13
MC14538B
http://onsemi.com
4
SWITCHING CHARACTERISTICS (Note 6) (C
L
= 50 pF, T
A
= 25_C)
Characteristic Symbol
V
DD
Vdc
All Types
Unit
Min Typ
(Note 7)
Max
Output Rise Time
t
TLH
= (1.35 ns/pF) C
L
+ 33 ns
t
TLH
= (0.60 ns/pF) C
L
+ 20 ns
t
TLH
= (0.40 ns/pF) C
L
+ 20 ns
t
TLH
5.0
10
15
−
−
−
100
50
40
200
100
80
ns
Output Fall Time
t
THL
= (1.35 ns/pF) C
L
+ 33 ns
t
THL
= (0.60 ns/pF) C
L
+ 20 ns
t
THL
= (0.40 ns/pF) C
L
+ 20 ns
t
THL
5.0
10
15
−
−
−
100
50
40
200
100
80
ns
Propagation Delay Time
A or B to Q or Q
t
PLH
, t
PHL
= (0.90 ns/pF) C
L
+ 255 ns
t
PLH
, t
PHL
= (0.36 ns/pF) C
L
+ 132 ns
t
PLH
, t
PHL
= (0.26 ns/pF) C
L
+ 87 ns
t
PLH
,
t
PHL
5.0
10
15
−
−
−
300
150
100
600
300
220
ns
Reset to Q or Q
t
PLH
, t
PHL
= (0.90 ns/pF) C
L
+ 205 ns
t
PLH
, t
PHL
= (0.36 ns/pF) C
L
+ 107 ns
t
PLH
, t
PHL
= (0.26 ns/pF) C
L
+ 82 ns
5.0
10
15
−
−
−
250
125
95
500
250
190
ns
Input Rise and Fall Times
Reset
t
r
, t
f
5
10
15
−
−
−
−
−
−
15
5
4
ms
B Input 5
10
15
−
−
−
300
1.2
0.4
1.0
0.1
0.05
ms
A Input 5
10
15
No Limit
−
Input Pulse Width
A, B, or Reset
t
WH
,
t
WL
5.0
10
15
170
90
80
85
45
40
−
−
−
ns
Retrigger Time t
rr
5.0
10
15
0
0
0
−
−
−
−
−
−
ns
Output Pulse Width — Q or Q
Refer to Figures 8 and 9
C
X
= 0.002 mF, R
X
= 100 kW
T
5.0
10
15
198
200
202
210
212
214
230
232
234
ms
C
X
= 0.1 mF, R
X
= 100 kW
5.0
10
15
9.3
9.4
9.5
9.86
10
10.14
10.5
10.6
10.7
ms
C
X
= 10 mF, R
X
= 100 kW
5.0
10
15
0.91
0.92
0.93
0.965
0.98
0.99
1.03
1.04
1.06
s
Pulse Width Match between circuits in
the same package.
C
X
= 0.1 mF, R
X
= 100 kW
100
[(T
1
– T
2
)/T
1
]
5.0
10
15
−
−
−
±1.0
±1.0
±1.0
±5.0
±5.0
±5.0
%
6. The formulas given are for the typical characteristics only at 25_C.
7. Data labelled “Typ” is not to be used for design purposes but is intended as an indication of the IC’s potential performance.
MC14538B
http://onsemi.com
5
Figure 1. Logic Diagram
(1/2 of DevIce Shown)
NOTE: Pins 1, 8 and 15 must
be externally grounded
-
+
-
+
V
DD
V
DD
P1
R
X
C
X
2
1
(14)
(15)
4 (12)
5(11)
3 (13)
A
B
RESET
V
SS
N1
V
ref1
C1 C2
ENABLE
V
ref2
ENABLE
CONTROL
S
RESET LATCH
Q
R
Q
R
RS
R
S
Q
Q
6(10)
7(9)
OUTPUT
LATCH
Figure 2. Power Dissipation Test Circuit and Waveforms
500 pF
V
DD
0.1 mF
CERAMIC
R
X
R
X
′
C
X
′
V
SS
C
X
V
SS
V
in
C
X
/R
X
A
B
RESET
A′
B′
RESET
′
Q
Q
Q′
Q
′
V
SS
C
L
C
L
C
L
C
L
20 ns 20 ns
V
DD
0 V
90%
10%
V
in
I
D
INPUT CONNECTIONS
Characteristics Reset A B
t
PLH
, t
PHL
, t
TLH
, t
THL
,
T, t
WH
, t
WL
V
DD
PG1 V
DD
t
PLH
, t
PHL
, t
TLH
, t
THL
,
T, t
WH
, t
WL
V
DD
V
SS
PG2
t
PLH(R)
, t
PHL(R)
,
t
WH
, t
WL
PG3 PG1 PG2
Figure 3. Switching Test Circuit
*Includes capacitance of probes,
wiring, and fixture parasitic.
NOTE: Switching test waveforms
for PG1, PG2, PG3 are shown
In Figure 4.
V
DD
R
X
R
X
′
V
SS
C
X
C
X
/R
X
A
B
RESET
A′
B′
RESET
′
Q
Q
Q′
Q
′
C
L
C
X
′
C
L
C
L
C
L
V
SS
PULSE
GENERATOR
PULSE
GENERATOR
PULSE
GENERATOR
V
SS
*C
L
= 50 pF
PG1 =
PG2 =
PG3 =
MC14538B
http://onsemi.com
6
Figure 4. Switching Test Waveforms
RESET
A
B
t
PLH
Q
Q
50%
t
WH
90%
10%
t
TLH
t
THL
t
WL
t
THL
t
PHL
t
THL
90%
10%
50%
T
50% 50% 50%
90%
10%
t
PLH
t
THL
t
TLH
t
PHL
t
WL
50%
90%
10%
t
PHL
t
PHL
t
TLH
t
THL
t
PLH
50% 50%
90%
10%
50%
50%
50%
t
rr
50% V
DD
V
DD
V
DD
t
TLH
Figure 5. Typical Normalized Distribution
of Units for Output Pulse Width
Figure 6. Typical Pulse Width Variation as
a Function of Supply Voltage V
DD
0
0.2
0.4
0.6
0.8
1.0
-4 -2 0 2 4
T, OUTPUT PULSE WIDTH (%)
RELATIVE FREQUENCY OF OCCURRENCE
2
1
0
1
2
15141312111098765
V
DD
, SUPPLY VOLTAGE (VOLTS)
NORMALIZED PULSE WIDTH CHANGE
WITH RESPECT TO VALUE AT V
DD
= 10 V (%)
T
A
= 25°C
R
X
= 100 kW
C
X
= 0.1 mF
0% POINT PULSE WIDTH
V
DD
= 5.0 V, T = 9.8 ms
V
DD
= 10 V, T = 10 ms
V
DD
= 15 V, T = 10.2 ms
R
X
= 100 kW
C
X
= 0.1 mF
Figure 7. Typical Total Supply Current
versus Output Duty Cycle
TOTAL SUPPLY CURRENT ( A)μ
1000
100
10
1.0
0.1
0.001 0.1 1.0 10 100
OUTPUT DUTY CYCLE (%)
R
X
= 100 kW, C
L
= 50 pF
ONE MONOSTABLE SWITCHING ONLY
V
DD
= 15 V
10 V
5.0 V
FUNCTION TABLE
Inputs Outputs
Reset A B Q Q
H H
H L
H L Not Triggered
H H Not Triggered
H L, H, H Not Triggered
H L L, H, Not Triggered
L X X L H
X X Not Triggered
P1-P3P4-P6P7-P9P10-P12P13-P13

MC14538BDWR2G

Mfr. #:
Buy MC14538BDWR2G
Manufacturer:
ON Semiconductor
Description:
Monostable Multivibrator 3-18V Dual Precision MonoStable
Lifecycle:
New from this manufacturer.
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