74HC4538D,652 Philips Semiconductors, 74HC4538D,652 Datasheet
74HC4538D,652
Manufacturer Part Number
74HC4538D,652
Description
MULTIVIBRATOR; SOIC; -40; +125
Manufacturer
Philips Semiconductors
Datasheet
1.74HC4538N652.pdf
(3 pages)
Specifications of 74HC4538D,652
Capacitance, Input, Maximum
3.5 pF
Circuit Type
High Speed, Silicon Gate
Current, Leakage, Input
10 μA
Logic Function
Multivibrator
Logic Type
CMOS
Number Of Circuits
Dual
Package Type
SO-16
Propagation Delay
27 ns
Special Features
Monostable, Retriggerable, Schmitt-Trigger
Temperature, Operating, Range
-40 to +125 °C
Voltage, Supply
4.5 V
Lead Free Status / Rohs Status
RoHS Compliant part
Electrostatic Device
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
74HC4538D,652
Manufacturer:
NEXPERIA/安世
Quantity:
20 000
Philips Semiconductors
FEATURES
GENERAL DESCRIPTION
The 74HC/HCT4538 are high-speed Si-gate CMOS
devices and are pin compatible with “4538” of the “4000B”
series. They are specified in compliance with JEDEC
standard no. 7A.
The 74HC/HCT4538 are dual retriggerable-resettable
monostable multivibrators. Each multivibrator has an
active LOW trigger/retrigger input (nA
QUICK REFERENCE DATA
GND = 0 V; T
Notes
1. C
2. For HC the condition is V
ORDERING INFORMATION
See
t
C
C
PHL
Separate reset inputs
Triggering from leading or trailing edge
Output capability: standard
I
Power-on reset on-chip
Dual retriggerable precision monostable
multivibrator
I
PD
SYMBOL
CC
f
f
C
V
D = duty factor in %
C
For HCT the condition is V
i
o
“74HC/HCT/HCU/HCMOS Logic Package Information”
/ t
CC
PD
= input frequency in MHz
L
EXT
category: MSI
= output frequency in MHz
(C
PLH
= output load capacitance in pF
P
= supply voltage in V
is used to determine the dynamic power dissipation (P
L
D
0.48
= timing capacitance in pF
= C
V
amb
CC
PD
2
propagation delay nA
input capacitance
power dissipation capacitance per multivibrator notes 1 and 2
C
= 25 C; t
EXT
V
f
o
CC
) = sum of outputs
2
V
CC
f
r
i
2
= t
I
f
f
I
o
= GND to V
= 6 ns
= GND to V
(C
PARAMETER
L
D
0
0
V
), an active HIGH
, nA
0.8
CC
2
1
CC
CC
to nQ, nQ
V
f
o
CC
)
1.5 V
where:
2
.
trigger/retrigger input (nA
direct reset input (nR
(nQ), and two pins (nC
external timing components C
variation over temperature range is
The “4538” may be triggered by either the positive or the
negative edges of the input pulse. The duration and
accuracy of the output pulse are determined by the
external timing components C
width (T) is equal to 0.7
techniques guarantee precise control of the output pulse
width.
A LOW level at nR
immediately.
Schmitt-trigger action in the trigger inputs makes the circuit
highly tolerant to slower rise and fall times.
D
in W):
C
L
= 15 pF; V
CONDITIONS
CC
D
D
terminates the output pulse
= 5 V
), an output (nQ) and its complement
TC
1
and nRC
) , an overriding active LOW
R
t
27
3.5
136
t
t
and R
C
74HC/HCT4538
and R
HC
t
. The linear design
TYPICAL
TC
Product specification
t
) for connecting the
. Typical pulse width
t
0.2%.
. The output pulse
30
3.5
138
HCT
ns
pF
pF
UNIT
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74HC4538D,652 Summary of contents
Page 1
... Philips Semiconductors Dual retriggerable precision monostable multivibrator FEATURES Separate reset inputs Triggering from leading or trailing edge Output capability: standard I category: MSI CC Power-on reset on-chip GENERAL DESCRIPTION The 74HC/HCT4538 are high-speed Si-gate CMOS devices and are pin compatible with “4538” of the “4000B” ...
Page 2
... Philips Semiconductors Dual retriggerable precision monostable multivibrator DC CHARACTERISTICS FOR 74HC For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications” Output capability: standard I category: MSI CC AC CHARACTERISTICS FOR 74HC GND = ns SYMBOL PARAMETER t propagation delay PLH propagation delay PHL propagation delay PHL propagation delay ...
Page 3
... Philips Semiconductors Dual retriggerable precision monostable multivibrator SYMBOL PARAMETER t retrigger time external timing EXT resistor C external timing EXT capacitor NON-STANDARD DC CHARACTERISTICS FOR 74HC Voltages are referenced to GND (ground = 0 V) SYMBOL PARAMETER I input leakage current I nRC EXT Note 1. This measurement can only be carried out after a trigger pulse is applied. ...