|
|
PDF 74HC4538 Data sheet ( Hoja de datos )
| Número de pieza | 74HC4538 | |
| Descripción | Dual Precision Monostable Multivibrator(Retriggerable / Resettable) | |
| Fabricantes | ON | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de 74HC4538 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
|
No Preview Available !
MC74HC4538A
Dual Precision
Monostable Multivibrator
(Retriggerable, Resettable)
The MC74HC4538A is identical in pinout to the MC14538B. The
device inputs are compatible with standard CMOS outputs; with
pullup resistors, they are compatible with LSTTL outputs.
This dual monostable multivibrator may be triggered by either the
positive or the negative edge of an input pulse, and produces a
precision output pulse over a wide range of pulse widths. Because the
device has conditioned trigger inputs, there are no trigger–input rise
and fall time restrictions. The output pulse width is determined by the
external timing components, Rx and Cx. The device has a reset
function which forces the Q output low and the Q output high,
regardless of the state of the output pulse circuitry.
• Unlimited Rise and Fall Times Allowed on the Trigger Inputs
• Output Pulse is Independent of the Trigger Pulse Width
• ± 10% Guaranteed Pulse Width Variation from Part to Part (Using
the Same Test Jig)
• Output Drive Capability: 10 LSTTL Loads
• Outputs Directly Interface to CMOS, NMOS and TTL
• Operating Voltage Range: 3.0 to 6.0 V
• Low Input Current: 1.0 µA
• High Noise Immunity Characteristic of CMOS Devices
• In Compliance with the Requirements Defined by JEDEC Standard
No. 7A
• Chip Complexity: 145 FETs or 36 Equivalent Gates
TRIGGER A1 4
INPUTS B1 5
LOGIC DIAGRAM
CX1 RX1
VCC
12
6 Q1
7 Q1
RESET 1 3
TRIGGER A2 12
INPUTS B2 11
CX2 RX2
VCC
15 14
10 Q2
9 Q2
PIN 16 = VCC
PIN 8 = GND
RESET 2 13
RX AND CX ARE EXTERNAL COMPONENTS
PIN 1 AND PIN 15 MUST BE HARD WIRED TO GND
© Semiconductor Components Industries, LLC, 2000
March, 2000 – Rev. 7
1
http://onsemi.com
16
1
16
1
MARKING
DIAGRAMS
16
PDIP–16
N SUFFIX
CASE 648
MC74HC4538AN
AWLYYWW
1
16
SO–16
D SUFFIX
CASE 751B
HC4538A
AWLYWW
1
A = Assembly Location
WL = Wafer Lot
YY = Year
WW = Work Week
PIN ASSIGNMENT
GND
CX1/RX1
RESET 1
A1
B1
Q1
Q1
GND
1
2
3
4
5
6
7
8
16 VCC
15 GND
14 CX2/RX2
13 RESET 2
12 A2
11 B2
10 Q2
9 Q2
FUNCTION TABLE
Inputs
Reset A
B
Outputs
QQ
H
HL
H
HX
HH
L Not Triggered
X Not Triggered
H L,H,
H Not Triggered
H L L,H, Not Triggered
LX
X
X LH
X Not Triggered
ORDERING INFORMATION
Device
Package Shipping
MC74HC4538AN
PDIP–16 2000 / Box
MC74HC4538AD
SOIC–16 48 / Rail
MC74HC4538ADR2
SOIC–16 2500 / Reel
Publication Order Number:
MC74HC4538A/D
1 page  
MC74HC4538A
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎOUTPUT PULSE WIDTH CHARACTERISTICS (CL = 50 pF)t
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎConditions
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎSymbol
Parameter
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎτ OutputPulseWidth*
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ(Figures 6 and 8)
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎΗ PulseWidthMatch
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎBetween Circuits in the
same Package
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎΗ PulseWidthMatch
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎVariation (Part to Part)
Timing Components
Rx = 10 kΩ, Cx = 0.1 µF
—
—
VCC
Volts
5.0
Guaranteed Limits
– 55 to
25_C
v 85_C
v 125_C
Min Max Min Max Min Max
0.63 0.77 0.6 0.8 0.59 0.81
Unit
ms
— ± 5.0 %
— ± 10 %
*For output pulse widths greater than 100 µs, typically τ = kRxCx, where the value of k may be found in Figure 1.
0.8
TA = 25°C
0.7
0.6
0.5
0.4
0.3
1 2 34 56 7
VCC, POWER SUPPLY VOLTAGE (VOLTS)
Figure 1. Typical Output Pulse Width Constant, k,
versus Supply Voltage
(For output pulse widths > 100 µs: τ = kRxCx)
10 s
1s
100 ms
VCC = 5 V, TA = 25°C
10 ms
1 ms
100 µs 1 MΩ
10 µs 100 kΩ
1 µs 10 kΩ
1 kΩ
100 ns
0.00001 0.0001
0.001 0.01 0.1
CAPACITANCE (µF)
1
10
Figure 2. Output Pulse Width versus
Timing Capacitance
100
1.1
Rx = 100 kΩ
1 Cx = 1000 pF
TA = 25°C
0.9
0.8
Rx = 1 MΩ
0.7 Cx = 0.1 µF
0.6
0.5
123 4 5 6
VCC, POWER SUPPLY VOLTAGE (VOLTS)
Figure 3. Normalized Output Pulse Width
versus Power Supply Voltage
7
http://onsemi.com
5
5 Page 
RISING–EDGE
TRIGGER
A
B
B = VCC
MC74HC4538A
TYPICAL APPLICATIONS
CX RX
VCC
Q
Q
RISING–EDGE
TRIGGER
A
B
RESET = VCC
CX RX
VCC
Q
Q
RESET = VCC
CX RX
A = GND
B
FALLING–EDGE
TRIGGER
VCC
Q
Q
RESET = VCC
Figure 12. Retriggerable Monostable Circuitry
CX RX
A
B
FALLING–EDGE
TRIGGER
VCC
Q
Q
RESET = VCC
Figure 13. Non–retriggerable Monostable Circuitry
A = GND
VCC B
GND N/C
RXCX
Q
Q
RESET
N/C
N/C
Figure 14. Connection of Unused Section
ONE–SHOT SELECTION GUIDE
100 ns 1 µs 10 µs 100 µs 1 ms 10 ms 100 ms 1 s
MC14528B
MC14536B
MC14538B
MC14541B
HC4538A*
*Limited operating voltage (2 – 6 V)
10 s
23 HR
5 MIN
TOTAL OUTPUT PULSE WIDTH RANGE
RECOMMENDED PULSE WIDTH RANGE
http://onsemi.com
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet 74HC4538.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| 74HC4538 | Dual retriggerable precision monostable multivibrator |  Philips |
| 74HC4538 | Dual retriggerable precision monostable multivibrator |  ON Semiconductor |
| 74HC4538 | Dual retriggerable precision monostable multivibrator |  Toshiba |
| 74HC4538 | Dual retriggerable precision monostable multivibrator |  Fairchild |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |