M54HC423 ST Microelectronics, M54HC423 Datasheet

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M54HC423

Manufacturer Part Number
M54HC423
Description
DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR
Manufacturer
ST Microelectronics
Datasheet
1.M54HC423.pdf (14 pages)
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DESCRIPTION
The M54/74HC423/423A are high speed CMOS
MONOSTABLE multivibrators
silicon gate C
They achieve the high speed operation similar to
equivalent LSTTL while maintaining the CMOS low
power dissipation. There are two trigger inputs, A
INPUT (negative edge) and B INPUT (positive
edge). These inputs are valid for rising/falling
signals, (t
maintains the MONOSTABLE state for the time
period determined by the external resistor Rx and
capacitor Cx.
Two different pulse width constant are available:
K
Taking CLR low breaks this MONOSTABLE
STATE. If the next trigger pulse occurs during the
MONOSTABLEperiod it makes the MONOSTABLE
period longer. Limit for values of Cx and Rx :
Cx : NO LIMIT
Rx : V
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.
October 1993
HIGH SPEED
t
LOW POWER DISSIPATION
STANDBY STATE I
ACTIVE STATE I
HIGH NOISE IMMUNITY
V
OUTPUT DRIVE CAPABILITY
10 LSTTL LOADS
SYMMETRICAL OUTPUT IMPEDANCE
I
BALANCED PROPAGATION DELAYS
t
WIDE OPERATING VOLTAGE RANGE
V
WIDE OUTPUT PULSE WIDTH RANGE
t
PIN AND FUNCTION COMPATIBLE WITH
54/74LS423
PD
OH
PLH
WOUT
0.46 for HC423
NIH
CC
V
CC
CC
= 25 ns (TYP) at V
= I
DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR
= t
(OPR) = 2 V TO 6 V
= V
OL
= 120 ns
< 3.0 V 5 K
r
PHL
3.0 V 1 K
– t
NIL
= 4 mA (MIN.)
2
f
MOS technology.
= 28 % V
– 1 sec). After triggering the output
CC
60 s OVER AT V
CC
K
= 700 A (MAX.) AT V
to 1 M
to 1 M
CC
=4 A (MAX.) AT T
CC
1 for HC423A.
(MIN.)
= 5V
fabricated
CC
= 4.5 V
A
CC
=25 C
=5V
with
NC =
No Internal
Connecti o n
(Plastic Package)
(Micro Package)
M54HCXXXF1R
M74HCXXXB1R
PIN CONNECTIONS (top view)
M1R
B1R
M54HC423/423A
M74HC423/423A
ORDER CODES :
M74HCXXXM1R
M74HCXXXC1R
(Ceramic Package)
(Chip Carrier)
C1R
F1R
1/14

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M54HC423 Summary of contents

Page 1

... Limit for values of Cx and LIMIT < All inputs are equipped with protection circuits against static discharge and transient excess voltage. October 1993 M54HC423/423A M74HC423/423A = =5V CC B1R (Plastic Package) M1R (Micro Package) M54HCXXXF1R = 4.5 V M74HCXXXB1R CC ...

Page 2

M54/M74HC423/423A SYSTEM DIAGRAM TIMING CHART 2/14 ...

Page 3

BLOCK DIAGRAM Note : (1) Cx, Rx, Dx are external components. ( clamping diode. The external capacitor is charged to V inthe stand-by state, i.e. no trigger. When the supply voltage is turned off Cx is discharged ...

Page 4

M54/M74HC423/423A FUNCTIONAL DESCRIPTION (continued) RE-TRIGGERED OPERATION When a second trigger pulse follows the first its effect will depend on the state of the multivibrator. If the capacitor Cx is being charged the voltage level of R/C external falls to Vrefl ...

Page 5

PIN DESCRIPTION PIN No SYMBOL NAME AND FUNCTION 1, 9 1A, 2A Trigger Inputs (Negative Edge Triggered 1B, 2B Trigger Inputs (Positive Edge Triggered 1CLR, Direct Reset (Active LOW) 2CLR 4, 12 1Q, 2Q Outputs (Active ...

Page 6

M54/M74HC423/423A RECOMMENDED OPERATING CONDITIONS Symbol Parameter V Supply Voltage CC V Input Voltage I V Output Voltage O T Operating Temperature: M54HC Series op M74HC Series Input Rise and Fall Time External Capacitor X ...

Page 7

AC ELECTRICAL CHARACTERISTICS (C Test Conditions Symbol Parameter V CC (V) t Output Transition 2.0 TLH t Time 4.5 THL 6.0 t Propagation 2.0 PLH t Delay Time 4.5 PHL ( 6.0 t Propagation 2.0 PLH ...

Page 8

M54/M74HC423/423A Output Pulse Width Constant Characteristics (for HC423) Output Pulse Width Characteristics (for HC423) 8/14 Output Pulse Width Constant Characteristics (for HC423A) Output Pulse Width Characteristics (for HC423A) ...

Page 9

TEST CIRCUIT I (Opr TRANSITION TIME OF INPUT WAVEFORM IS THE SAME AS THAT IN SASE OF SWITCHINGCHARACTERISTICS TESTS. SWITCHING CHARACTERISTICS TEST WAVEFORM M54/M74HC423/423A 9/14 ...

Page 10

M54/M74HC423/423A Plastic DIP16 (0.25) MECHANICAL DATA DIM. MIN. a1 0. 10/14 mm TYP. MAX. MIN. 0.020 1.65 0.030 0.5 0.25 20 8.5 2.54 17.78 7.1 5.1 3.3 1.27 ...

Page 11

Ceramic DIP16/1 MECHANICAL DATA mm DIM. MIN. TYP 3.3 E 0.38 e3 17.78 F 2.29 G 0.4 H 1.17 L 0. 7.8 Q M54/M74HC423/423A inch MAX. MIN. TYP 0.130 0.015 0.700 ...

Page 12

M54/M74HC423/423A SO16 (Narrow) MECHANICAL DATA DIM. MIN 0 0. 9 3.8 G 4 12/14 mm TYP. MAX. MIN. 1.75 0.2 0.004 1.65 ...

Page 13

PLCC20 MECHANICAL DATA mm DIM. MIN. TYP. A 9.78 B 8.89 D 4.2 d1 2.54 d2 0.56 E 7.37 e 1.27 e3 5. 1.27 M1 1.14 M54/M74HC423/423A inch MAX. MIN. TYP. 10.03 0.385 9.04 0.350 4.57 ...

Page 14

M54/M74HC423/423A Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsability for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from ...

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