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PDF MC14538B Data sheet ( Hoja de datos )
| Número de pieza | MC14538B | |
| Descripción | Dual Precision Retriggerable/Resettable Monostable Multivibrator | |
| Fabricantes | Motorola Semiconductors | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MC14538B (archivo pdf) en la parte inferior de esta página. Total 10 Páginas | ||
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MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
MC14538B
Dual Precision
Retriggerable/Resettable
Monostable Multivibrator
The MC14538B is a dual, retriggerable, resettable monostable multivibra-
tor. It may be triggered from either edge of an input pulse, and produces an
accurate output pulse over a wide range of widths, the duration and accuracy
of which are determined by the external timing components, CX and RX.
• Unlimited Rise and Fall Time Allowed on the A Trigger Input
• Pulse Width Range = 10 µs to 10 s
• Latched Trigger Inputs
• Separate Latched Reset Inputs
• 3.0 Vdc to 18 Vdc Operational Limits
• Triggerable from Positive (A Input) or Negative–Going Edge (B–Input)
• Capable of Driving Two Low–power TTL Loads or One Low–power
Schottky TTL Load Over the Rated Temperature Range
• Pin–for–pin Compatible with MC14528B and CD4528B (CD4098)
• Use the MC54/74HC4538A for Pulse Widths Less Than 10 µs with
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎSupplies Up to 6 V.
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎMAXIMUM RATINGS* (Voltages Referenced to VSS)
Symbol
Parameter
Value
Unit
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎVDD
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎVin, Vout
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎIin, Iout
DC Supply Voltage
Input or Output Voltage (DC or Transient)
Input or Output Current (DC or Transient),
per Pin
– 0.5 to + 18.0
– 0.5 to VDD + 0.5
± 10
V
V
mA
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎPD Power Dissipation, per Package†
500 mW
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎTstg Storage Temperature
– 65 to + 150
_C
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎTL Lead Temperature (8–Second Soldering)
260 _C
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ* Maximum Ratings are those values beyond which damage to the device may occur.
†Temperature Derating:
Plastic “P and D/DW” Packages: – 7.0 mW/_C From 65_C To 125_C
Ceramic “L” Packages: – 12 mW/_C From 100_C To 125_C
ONE–SHOT SELECTION GUIDE
100 ns 1 µs 10 µs 100 µs 1 ms 10 ms 100 ms 1 s
MC14528B
MC14536B
MC14538B
MC14541B
MC4538A*
10 s
23 HR
5 MIN.
L SUFFIX
CERAMIC
CASE 620
P SUFFIX
PLASTIC
CASE 648
DW SUFFIX
SOIC
CASE 751G
ORDERING INFORMATION
MC14XXXBCP
MC14XXXBCL
*MC14XXXBDW
Plastic
Ceramic
SOIC
TA = – 55° to 125°C for all packages.
BLOCK DIAGRAM
CX RX
A
4
B
5
3
12
Q1
Q1
RESET
VDD
6
7
A
12
11 B
CX RX
15 14
Q2
Q2
RESET
VDD
10
9
13
RX AND CX ARE EXTERNAL COMPONENTS.
VDD = PIN 16
VSS = PIN 8, PIN 1, PIN 15
*LIMITED OPERATING VOLTAGE (2 – 6 V)
TOTAL OUTPUT PULSE WIDTH RANGE
RECOMMENDED PULSE WIDTH RANGE
* Consult factory for possible “D” suffix SOIC
Case 751B.
REV 3
1/94
©MMOotoTrOolaR, IOncL. A199C5MOS LOGIC DATA
MC14538B
1
1 page  
A
B
RESET
tPLH
Q
Q
50%
tWH
50%
T
50%
tPLH
50% 50%
tPHL tPHL
50%
50%
tTLH
tWL
tTHL
90%
10%
tTLH
90%
10%
tTHL
tTHL
90%
10%
tTHL
90%
10%
tTLH
tPHL
50%
tWL
tPHL
tTHL
tPLH
90%
10%
50%
tTLH
Figure 4. Switching Test Waveforms
50% VDD
VDD
VDD
trr
50%
50%
TA = 25°C
RX = 100 kΩ
CX = 0.1 µF
1.0
0.8
0% POINT PULSE WIDTH
VDD = 5.0 V, T = 9.8 ms
VDD = 10 V, T = 10 ms
VDD = 15 V, T = 10.2 ms
0.6
0.4
0.2
0
–4 –2 0 2 4
T, OUTPUT PULSE WIDTH (%)
Figure 5. Typical Normalized Distribution
of Units for Output Pulse Width
1000
RX = 100 kΩ, CL = 50 pF
100 ONE MONOSTABLE SWITCHING ONLY
VDD = 15 V
10
10 V
1.0
5.0 V
0.1
0.001
0.1 1.0
10
OUTPUT DUTY CYCLE (%)
Figure 7. Typical Total Supply Current
versus Output Duty Cycle
100
MOTOROLA CMOS LOGIC DATA
RX = 100 kΩ
CX = 0.1 µF
2
1
0
1
2
5 6 7 8 9 10 11 12 13 14 15
VDD, SUPPLY VOLTAGE (VOLTS)
Figure 6. Typical Pulse Width Variation as
a Function of Supply Voltage VDD
Reset
H
H
H
H
H
H
L
FUNCTION TABLE
Inputs
Outputs
ABQQ
H
L
L
H
Not Triggered
Not Triggered
L, H,
L
H
L, H,
Not Triggered
Not Triggered
XXLH
XX
Not Triggered
MC14538B
5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet MC14538B.PDF ] | |
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