STMICROELECTRONICS M54HC123K1

M54HC123
RAD-HARD DUAL
RETRIGGERABLE MONOSTABLE MULTIVIBRATOR
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HIGH SPEED: tPD = 23 ns (TYP.) at VCC = 6V
LOW POWER DISSIPATION:
STAND BY STATE:
ICC=4µA (MAX.) at TA=25°C
ACTIVE STATE:
ICC=200µA (MAX.) at VCC = 5V
HIGH NOISE IMMUNITY:
VNIH = VNIL = 28% VCC (MIN.)
SYMMETRICAL OUTPUT IMPEDANCE:
|IOH| = IOL = 4mA (MIN)
BALANCED PROPAGATION DELAYS:
tPLH ≅ tPHL
WIDE OPERATING VOLTAGE RANGE:
VCC (OPR) = 2V to 6V
WIDE OUTPUT PULSE WIDTH RANGE:
tWOUT = 120 ns ~ 60 s OVER AT VCC = 4.5 V
PIN AND FUNCTION COMPATIBLE WITH
54 SERIES 123
SPACE GRADE-1: ESA SCC QUALIFIED
50 krad QUALIFIED, 100 krad AVAILABLE ON
REQUEST
NO SEL UNDER HIGH LET HEAVY IONS
IRRADIATION
DEVICE FULLY COMPLIANT WITH
SCC-9207-006
DESCRIPTION
The M54HC123 is an high speed CMOS
MONOSTABLE MULTIVIBRATOR fabricated with
silicon gate C2MOS technology.
There are two trigger inputs, A INPUT (negative
edge) and B INPUT (positive edge). These inputs
DILC-16
FPC-16
ORDER CODES
PACKAGE
FM
EM
DILC
FPC
M54HC123D
M54HC123K
M54HC123D1
M54HC123K1
are valid for slow rising/falling signals, (tr=tf=l sec).
The device may also be triggered by using the
CLR input (positive-edge) because of the
Schmitt-trigger input; after triggering the output
maintains the MONOSTABLE state for the time
period determined by the external resistor RX and
capacitor CX. When CX > 10nF and RX > 10KΩ,
the output pulse width value is approximately
given by the formula: tW(OUT) = K · Cx · Rx.
(K ≅ 0.45).
Taking CLR low breaks this MONOSTABLE
STATE. If the next trigger pulse occurs during the
MONOSTABLE
period
it
makes
the
MONOSTABLE period longer. Limit for values of
Cx and Rx : Cx : NO LIMIT
Rx : VCC < 3.0V 5KΩ to 1MΩ
VCC > 3.0V 1KΩ to 1MΩ
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.
PIN CONNECTION
March 2004
1/11
M54HC123
IEC LOGIC SYMBOLS
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN N°
SYMBOL
1,9
1A, 2A
2, 10
1B, 2B
3, 11
1 CLR
2 CLR
4, 12
1Q, 2Q
7
2RX/CX
13, 5
1Q, 2Q
1CX
2CX
14, 6
15
1RX/CX
8
GND
VCC
16
NAME AND FUNCTION
Trigger Inputs (Negative
Edge Triggered)
Trigger Inputs (Positive
Edge Triggered)
Direct Reset LOW and
trigger Action at Positive
Edge
Outputs (Active Low)
External Resistor
Capacitor Connection
Outputs (Active High)
External Capacitor
Connection
External Resistor
Capacitor Connection
Ground (0V)
Positive Supply Voltage
TRUTH TABLE
INPUTS
OUTPUTS
NOTE
A
X
H
B
CLR
H
H
L
X
H
H
L
2/11
Q
OUTPUT ENABLE
L
L
H
H
H
L
H
X
X
X : Don’t Care
Q
INHIBIT
INHIBIT
OUTPUT ENABLE
OUTPUT ENABLE
L
L
H
INHIBIT
M54HC123
SYSTEM DIAGRAM
This logic diagram has not be used to estimate propagation delays
TIMING CHART
3/11
M54HC123
BLOCK DIAGRAM
(1) Cx, Rx, Dx are external components.
(2) Dx is a clamping diode.
The external capacitor is charged to Vcc in the stand-by-state, i.e. no trigger. When the supply voltage is turned off Cx is discharged mainly
trough an internal parasitic diode (see figures). If Cx is sufficiently large and Vcc decreases rapidly, there will be some possibility of damaging
the I.C. with a surge current or latch-up. If the voltage supply filter capacitor is large enough and Vcc decrease slowly, the surge current is
automatically limited and damage to the I.C. is avoided. The maximum forward current of the parasitic diode is approximately 20 mA. In cases
where Cx is large the time taken for the supply voltage to fall to 0.4 Vcc can be calculated as follows:
tf > (Vcc - 0.7) x Cx/20mA
In cases where tf is too short an external clamping diode is required to protect the I.C. from the surge current.
FUNCTIONAL DESCRIPTION
STAND-BY STATE
The external capacitor, Cx, is fully charged to VCC
in the stand-by state. Hence, before triggering,
transistor Qp and Qn (connected to the Rx/Cx
node) are both turned-off. The two comparators
that control the timing and the two reference
voltage sources stop operating. The total supply
current is therefore only leakage current.
TRIGGER OPERATION
Triggering occurs when:
1 st) A is "LOW" and B has a falling edge;
2 nd) B is "HIGH" and A has a rising edge;
3 rd) A is "LOW" and B is HIGH and C1 has a
rising edge;
After the multivibrator has been retriggered
comparator C1 and C2 start operating and Qn is
turned on. Cx then discharges through Qn. The
voltage at the node R/C external falls.
When it reaches VREFL the output of comparator
C1 becomes low. This in turn reset the flip-flop
and Qn is turned off.
At this point C1 stops functioning but C2 continues
to operate.
The voltage at R/C external begins to rise with a
time constant set by the external components Rx,
Cx.
Triggering the multivibrator causes Q to go high
after internal delay due to the flip-flop and the
gate. Q remains high until the voltage at R/C
external rises again to VREFH. At this point C2
4/11
output goes low and O goes low. C2 stop
operating. That means that after triggering when
the voltage R/C external returns to VREFH the
multivibrator has returned to its MONOSTABLE
STATE. In the case where Rx · Cx are large
enough and the discharge time of the capacitor
and the delay time in the I.C. can be ignored, the
width of the output pulse tw(out) is as follows:
tW(OUT) = 0.45 Cx · Rx
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 again and Q
remains High i.e. the retrigger pulse arrives in a
time shorter than the period Rx · Cx seconds, the
capacitor charging time constant. If the second
trigger pulse is very close to the initial trigger pulse
it is ineffective; i.e. the second trigger must arrive
in the capacitor discharge cycle to be ineffective;
Hence the minimum time for a second trigger to be
effective depends on VCC and Cx
RESET OPERATION
CL is normally high. If CL is low, the trigger is not
effective because Q output goes low and trigger
control flip-flop is reset.
Also transistor Op is turned on and Cx is charged
quickly to VCC. This means if CL input goes low
the IC becomes waiting state both in operating
and non operating state.
M54HC123
ABSOLUTE MAXIMUM RATINGS
Symbol
VCC
Parameter
Supply Voltage
Value
Unit
-0.5 to +7
V
VI
DC Input Voltage
-0.5 to VCC + 0.5
V
VO
DC Output Voltage
-0.5 to VCC + 0.5
V
IIK
DC Input Diode Current
± 20
mA
IOK
DC Output Diode Current
± 20
mA
IO
DC Output Current
± 25
mA
± 50
mA
ICC or IGND DC VCC or Ground Current
PD
Power Dissipation
Tstg
Storage Temperature
TL
Lead Temperature (10 sec)
300
mW
-65 to +150
°C
265
°C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied
RECOMMENDED OPERATING CONDITIONS
Symbol
VCC
Parameter
Supply Voltage
Value
Unit
2 to 6
V
VI
Input Voltage
0 to VCC
V
VO
Output Voltage
0 to VCC
V
Top
Operating Temperature
Input Rise and Fall Time
tr, tf
Cx
Rx
External Capacitor
External Resistor
-55 to 125
°C
VCC = 2.0V
0 to 1000
ns
VCC = 4.5V
0 to 500
ns
VCC = 6.0V
0 to 400
ns
NO LIMITATION
pF
VCC < 3V
5K to 1M
VCC > 3V
1K to 1M
Ω
The Maximum allowable values of Cx and Rx are a function of leakage of capacitor Cx, the leakage of device and leakage due to the board
layout and surface resistance. Susceptibility to externally induced noise may occur for Rx > 1MΩ
DC SPECIFICATIONS
Test Condition
Symbol
VIH
VIL
Parameter
High Level Input
Voltage
Low Level Input
Voltage
VCC
(V)
2.0
4.5
6.0
2.0
4.5
6.0
Value
TA = 25°C
Min.
Typ.
Max.
1.5
3.15
4.2
-40 to 85°C
-55 to 125°C
Min.
Min.
Max.
1.5
3.15
4.2
0.5
1.35
1.8
Max.
1.5
3.15
4.2
0.5
1.35
1.8
Unit
V
0.5
1.35
1.8
V
5/11
M54HC123
Test Condition
Symbol
VOH
VOL
II
ICC
ICC’
Parameter
High Level Output
Voltage
Low Level Output
Voltage
Input Leakage
Current
Quiescent Supply
Current
Active State Supply
Current (1)
(1) : Per Circuit
6/11
Value
TA = 25°C
VCC
(V)
Min.
Typ.
Max.
-40 to 85°C
-55 to 125°C
Min.
Min.
Max.
Unit
Max.
2.0
IO=-20 µA
1.9
2.0
1.9
1.9
4.5
IO=-20 µA
4.4
4.5
4.4
4.4
6.0
IO=-20 µA
5.9
6.0
5.9
5.9
4.5
IO=-4.0 mA
4.18
4.31
4.13
4.10
6.0
IO=-5.2 mA
5.68
5.8
5.63
5.60
2.0
IO=20 µA
0.0
0.1
0.1
0.1
4.5
IO=20 µA
0.0
0.1
0.1
0.1
6.0
IO=20 µA
0.0
0.1
0.1
0.1
4.5
IO=4.0 mA
0.17
0.26
0.33
0.40
6.0
IO=5.2 mA
0.18
0.26
0.33
0.40
6.0
VI = VCC or GND
± 0.1
±1
±1
µA
6.0
VI = VCC or GND
4
40
80
µA
2.0
4.5
6.0
VI = VCC or GND
Pin 7 or 15
VIN = VCC/2
200
600
1
260
780
1.3
320
960
1.6
µA
µA
mA
45
500
0.7
V
V
M54HC123
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6ns)
Test Condition
Symbol
Parameter
tPLH tPHL Propagation Delay Time
(A, B - Q, Q)
tPLH tPHL Propagation Delay Time
(CLR TRIGGER - Q, Q)
tPLH tPHL Propagation Delay Time
(CLR - Q, Q)
tWOUT
∆tWOUT
tW(H)
tW(L)
tW(L)
trr
TA = 25°C
VCC
(V)
tTLH tTHL Output Transition Time
Output Pulse Width
Output Pulse Width Error
Between Circuits in Same
Package
Minimum Pulse Width
Minimum Pulse Width
(CLR)
Minimum Retrigger Time
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
Value
Min.
Cx = 100 pF
Rx = 10KΩ
Cx = 0.1µF
Rx = 100KΩ
Typ.
Max.
30
8
7
102
29
22
102
31
23
68
20
16
1.4
1.2
1.1
4.6
4.4
4.3
±1
75
15
13
210
42
36
235
47
40
160
32
27
-40 to 85°C
-55 to 125°C
Min.
Min.
Max.
95
19
16
265
53
45
295
59
50
200
40
34
Unit
Max.
110
22
19
315
63
54
355
71
60
240
48
41
ns
ns
ns
ns
µs
ms
%
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
75
15
13
75
15
13
95
19
16
95
19
16
110
22
19
110
22
19
325
108
78
5
1.4
1.2
Cx = 100 pF
Rx = 10KΩ
Cx = 0.1µF
Rx = 100KΩ
ns
ns
ns
µs
CAPACITIVE CHARACTERISTICS
Test Condition
Symbol
Parameter
CIN
Input Capacitance
CPD
Power Dissipation
Capacitance
(note 1)
VCC
(V)
Value
TA = 25°C
Min.
Typ.
Max.
5.0
5
10
5.0
162
-40 to 85°C
-55 to 125°C
Min.
Min.
Max.
10
Unit
Max.
10
pF
pF
1) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without
load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC’ Duty/100
+ Ic/2(per monostable) (Icc’: Active Supply current) (Duty:%)
7/11
M54HC123
TEST CIRCUIT
CL = 50pF or equivalent (includes jig and probe capacitance)
RT = ZOUT of pulse generator (typically 50Ω)
WAVEFORM: SWITCHING CHARACTERISTICS TEST WAVEFORM (f=1MHz; 50% duty cycle)
8/11
M54HC123
DILC-16 MECHANICAL DATA
mm.
inch
DIM.
MIN.
TYP
MAX.
MIN.
TYP.
MAX.
A
2.1
2.71
0.083
0.107
a1
3.00
3.70
0.118
0.146
a2
0.63
1.14
0.025
B
1.82
2.39
0.072
b
0.40
0.45
0.50
0.016
0.018
0.020
b1
0.20
0.254
0.30
0.008
0.010
0.012
D
20.06
20.32
20.58
0.790
0.800
0.810
e
7.36
7.62
7.87
0.290
0.300
0.310
e1
0.88
2.54
0.035
0.045
0.094
0.100
e2
17.65
17.78
17.90
0.695
0.700
0.705
e3
7.62
7.87
8.12
0.300
0.310
0.320
F
7.29
7.49
7.70
0.287
0.295
0.303
I
3.83
0.151
K
10.90
12.1
0.429
0.476
L
1.14
1.5
0.045
0.059
0056437F
9/11
M54HC123
FPC-16 MECHANICAL DATA
mm.
inch
DIM.
MIN.
TYP
MAX.
MIN.
TYP.
MAX.
A
6.75
6.91
7.06
0.266
0.272
0.278
B
9.76
9.94
10.14
0.384
0.392
0.399
C
1.49
1.95
0.059
D
0.102
0.127
0.152
0.004
0.005
0.006
E
8.76
8.89
9.01
0.345
0.350
0.355
F
0.077
1.27
G
0.38
H
6.0
L
18.75
M
0.33
0.050
0.43
0.48
0.015
0.017
0.019
0.237
0.38
N
22.0
0.738
0.43
0.013
0.867
0.015
4.31
0.017
0.170
G
F
D
H
9
16
A
N
L
8
1
H
E
B
10/11
M
C
0016030E
M54HC123
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11/11