MC74HC4538ADTR2 ON Semiconductor, MC74HC4538ADTR2 Datasheet - Page 9
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MC74HC4538ADTR2
Manufacturer Part Number
MC74HC4538ADTR2
Description
IC MULTIVIBRATOR DUAL 16-TSSOP
Manufacturer
ON Semiconductor
Series
74HCr
Datasheet
1.MC74HC4538ADG.pdf
(16 pages)
Specifications of MC74HC4538ADTR2
Logic Type
Monostable
Independent Circuits
2
Schmitt Trigger Input
No
Propagation Delay
30ns
Current - Output High, Low
5.2mA, 5.2mA
Voltage - Supply
3 V ~ 6 V
Operating Temperature
-55°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
16-TSSOP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
INPUTS
A1, A2 (Pins 4, 12)
either of these pins triggers the corresponding multivibrator
when there is a high level on the B1 or B2 input.
B1, B2 (Pins 5, 11)
either of these pins triggers the corresponding multivibrator
when there is a low level on the A1 or A2 input.
Reset 1, Reset 2 (Pins 3, 13)
one of these pins, the Q output of the corresponding
multivibrator is reset to a low level and the Q output is set to
a high level.
C
common points of the external timing resistors and
X
A
B
Positive−edge trigger inputs. A rising−edge signal on
Negative−edge trigger inputs. A falling−edge signal on
Reset inputs (active low). When a low level is applied to
External timing components. These pins are tied to the
1/R
X
1 and C
RESET
X
2/R
V
CC
X
2 (Pins 2 and 14)
M2
V
CC
M1
M3
2 kW
POWER
RESET
ON
RxCx
Figure 11. Logic Detail (1/2 the Device)
REFERENCE
REFERENCE
CIRCUIT
CIRCUIT
LOWER
UPPER
TRIGGER
CONTROL CIRCUIT
LOWER
−
+
−
+
UPPER
V
V
re
PIN DESCRIPTIONS
re
,
http://onsemi.com
MC74HC4538A
,
C
CB
R
Q
9
capacitors (see the Block Diagram). Polystyrene capacitors
are recommended for optimum pulse width control.
Electrolytic capacitors are not recommended due to high
leakages associated with these type capacitors.
GND (Pins 1 and 15)
to ground through these pins.
OUTPUTS
Q1, Q2 (Pins 6, 10)
low) pulse high when the multivibrator is triggered at either
the A or the B input. The width of the pulse is determined by
the external timing components, R
Q1, Q2 (Pins 7, 9)
pulse low when the multivibrator is triggered at either the A
or the B input. These outputs are the inverse of Q1 and Q2.
OUTPUT
External ground. The external timing capacitors discharge
Noninverted monostable outputs. These pins (normally
Inverted monostable outputs. These pins (normally high)
LATCH
RESET LATCH
TRIGGER CONTROL
RESET CIRCUIT
X
and C
X
.
Q
Q