IK Semicon IN74HC123A Dual retriggerable monostable multivibrator Datasheet

TECHNICAL DATA
IN74HC123A
Dual Retriggerable Monostable
Multivibrator
The IN74HC123A is identical in pinout to the LS/ALS123. The
device inputs are compatible with standard CMOS outputs; with pullup
resistors, they are compatible with LS/ALSTTL outputs.
There are two trigger inputs, A INPUT (negative edge) and
B INPUT (positive edge). These inputs are valid for rising/falling signals.
The device may also be triggered by using the CLR input (positiveedge) 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. Taking CLR low breaks this
MONOSTABLE STATE. If the next trigger pulse occurs during the
MONOSTABLE period it makes the MONOSTABLE period longer.
• 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
ORDERING INFORMATION
IN74HC123AN Plastic
IN74HC123AD SOIC
TA = -55° to 125° C for all packages
PIN ASSIGNMENT
LOGIC DIAGRAM
FUNCTION TABLE
PIN 16 =VCC
PIN 8 = GND
Note
(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 through an internal parasitic diode.
If CX is sufficiently large and VCC decreases rapidy, 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 the I.C. is avoided. The
maximum forward current of the parasitic diode is
approximately 20 mA.
Inputs
A
X
H
Outputs
B
CLR
H
H
L
H
L*
H*
Inhibit
H
*
*
Inhibit
X
L
Q
Note
Q
Output
Enable
L
H
H
L
H
X
X
Output
Enable
Output
Enable
L
L
H
Inhibit
X = don’t care
*
- except for monostable period
Rev. 00
IN74HC123A
MAXIMUM RATINGS*
Symbol
Parameter
Value
Unit
-0.5 to +7.0
V
VCC
DC Supply Voltage (Referenced to GND)
VIN
DC Input Voltage (Referenced to GND)
-1.5 to VCC +1.5
V
DC Output Voltage (Referenced to GND)
-0.5 to VCC +0.5
V
±20
±30
mA
VOUT
IIN
DC Input Current, per Pin
A, B, CLR
CX, RX
IOUT
DC Output Current, per Pin
±25
mA
ICC
DC Supply Current, VCC and GND Pins
±50
mA
PD
Power Dissipation in Still Air, Plastic DIP+
SOIC Package+
750
500
mW
-65 to +150
°C
260
°C
Tstg
TL
Storage Temperature
Lead Temperature, 1 mm from Case for 10 Seconds
(Plastic DIP or SOIC Package)
*
Maximum Ratings are those values beyond which damage to the device may occur.
Functional operation should be restricted to the Recommended Operating Conditions.
+Derating - Plastic DIP: - 10 mW/°C from 65° to 125°C
SOIC Package: : - 7 mW/°C from 65° to 125°C
RECOMMENDED OPERATING CONDITIONS
Symbol
VCC
VIN, VOUT
Parameter
Min
DC Supply Voltage (Referenced to GND)
Operating Temperature, All Package Types
tr, tf
Input Rise and Fall Time - CLR
(Figure 2)
VCC =2.0 V
VCC =4.5 V
VCC =6.0 V
A or B
**
RX
External Timing Resistor
CX
External Timing Capacitor
Unit
6.0
V
0
VCC
V
-55
+125
°C
0
0
0
1000
500
400
ns
-
No
Limit
10
2.0
1000
1000
kΩ
0
No
Limit
µF
3.0
DC Input Voltage, Output Voltage (Referenced to GND)
TA
Max
VCC <4.5 V
VCC ≥ 4.5 V
**
The In74HC123 will function at 2.0 V but for optimum pulse width stability, VCC should be above
3.0 V.
This device contains protection circuitry to guard against damage due to high static voltages or electric fields.
However, precautions must be taken to avoid applications of any voltage higher than maximum rated voltages to this
high-impedance circuit. For proper operation, VIN and VOUT should be constrained to the range GND≤(VIN or
VOUT)≤VCC.
Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or VCC). Unused
outputs must be left open.
Rev. 00
IN74HC123A
DC ELECTRICAL CHARACTERISTICS (Voltages Referenced to GND)
VCC
Symbol
Parameter
Test Conditions
Guaranteed Limit
V
25 °C to
-55°C
≤85
°C
≤125
°C
Unit
VIH
Minimum HighLevel Input
Voltage
VOUT=0.1 V or VCC-0.1 V
⎢IOUT⎢≤ 20 µA
2.0
4.5
6.0
1.5
3.15
4.2
1.5
3.15
4.2
1.5
3.15
4.2
V
VIL
Maximum Low Level Input
Voltage
VOUT=0.1 V or VCC-0.1 V
⎢IOUT⎢ ≤ 20 µA
2.0
4.5
6.0
0.5
1.35
1.8
0.5
1.35
1.8
0.5
1.35
1.8
V
VOH
Minimum HighLevel Output
Voltage
VIN=VIH or VIL
⎢IOUT⎢ ≤ 20 µA
2.0
4.5
6.0
1.9
4.4
5.9
1.9
4.4
5.9
1.9
4.4
5.9
V
4.5
6.0
3.98
5.48
3.84
5.34
3.7
5.2
2.0
4.5
6.0
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
VIN=VIH or VIL
⎢IOUT⎢ ≤ 4.0 mA
⎢IOUT⎢ ≤ 5.2 mA
4.5
6.0
0.26
0.26
0.33
0.33
0.4
0.4
VIN=VIH or VIL
⎢IOUT⎢ ≤ 4.0 mA
⎢IOUT⎢ ≤ 5.2 mA
VOL
Maximum LowLevel Output
Voltage
VIN=VIH or VIL
⎢IOUT⎢ ≤ 20 µA
V
IIN
Maximum Input
Leakage Current
(A, B, CLR)
VIN=VCC or GND
6.0
±0.1
±1.0
±1.0
µA
IIN
Maximum Input
Leakage Current
(RX, CX)
VIN=VCC or GND
6.0
±50
±500
±500
nA
ICC
Maximum
Quiescent Supply
Current
(per Package)
Standby State
VIN=VCC or GND
Q1 and Q2 = Low
IOUT=0µA
6.0
130
220
350
µA
25°C
-45°C
to
85°C
-55°C
to
125°C
400
600
800
ICC
Maximum Supply
Current
(per Package)
Active State
VIN=VCC or GND
Q1 and Q2 = High
IOUT=0µA
Pins 15 and 7 = 0.5 VCC
6.0
µA
Rev. 00
IN74HC123A
AC ELECTRICAL CHARACTERISTICS (CL=50pF,Input tr=tf=6.0 ns)
Guaranteed Limit
VCC
Symbol
Parameter
V
25 °C
to
-55°C
≤85
°C
≤125
°C
Unit
tPLH, tPHL
Maximum Propagation Delay, Input A or B to Q
or Q (Figures 1 and 3)
2.0
4.5
6.0
255
50
45
320
65
55
385
75
65
ns
tPLH, tPHL
Maximum Propagation Delay , CLR to Q or Q
(Figures 2 and 3)
2.0
4.5
6.0
215
45
35
270
55
45
325
65
55
ns
tTLH, tTHL
Maximum Output Transition Time, Any
Output(Figures 2 and 3)
2.0
4.5
6.0
75
16
14
95
20
17
110
22
20
ns
-
10
25
10
25
10
25
pF
CIN
Maximum Input Capacitance
A, B, CLR
CX, RX
Power Dissipation Capacitance
(Per Multivibrator)
CPD
Typical @25°C,VCC=5.0 V
Used to determine the no-load dynamic power
consumption:
PD=CPDVCC2f+ICCVCC
150
pF
TIMING REQUIREMENTS (CL=50pF,Input tr=tf=6.0 ns)
VCC
Guaranteed Limit
Symbol
Parameter
V
25 °C to
-55°C
≤85°C
≤125°C
Unit
trec
Minimum Recovery Time,
Inactive to A or B
(Figure 2)
2.0
4.5
6.0
0
0
0
0
0
0
0
0
0
ns
tw
Minimum Pulse Width,
Input A or B (Figure 1)
2.0
4.5
6.0
100
20
17
125
25
20
150
30
25
ns
tw
Minimum Pulse Width,
CLR (Figure 2)
2.0
4.5
6.0
100
20
17
125
25
20
150
30
25
ns
tr, tr
Maximum Input Rise and
Fall Times, CLR
(Figure 2)
2.0
4.5
6.0
1000
500
400
1000
500
400
1000
500
400
ns
A or B (Figure 2)
2.0
4.5
6.0
No Limit
Rev. 00
IN74HC123A
Figure 1. Switching Waveforms
Figure 2. Switching Waveforms
Figure 3. Test Circuit
Rev. 00
IN74HC123A
TIMING DIAGRAM
EXPANDED LOGIC DIAGRAM
Rev. 00
IN74HC123A
N SUFFIX PLASTIC DIP
(MS - 001BB)
A
Dimension, mm
9
16
Symbol
MIN
MAX
A
18.67
19.69
B
6.1
7.11
B
1
8
5.33
C
F
L
C
D
0.36
0.56
F
1.14
1.78
G
2.54
H
7.62
-T- SEATING
PLANE
N
G
K
M
H
D
J
0.25 (0.010) M T
NOTES:
1. Dimensions “A”, “B” do not include mold flash or protrusions.
Maximum mold flash or protrusions 0.25 mm (0.010) per side.
J
0°
10°
K
2.92
3.81
L
7.62
8.26
M
0.2
0.36
N
0.38
D SUFFIX SOIC
(MS - 012AC)
Dimension, mm
A
16
9
H
B
1
G
P
8
R x 45
C
-TK
D
SEATING
PLANE
J
0.25 (0.010) M T C M
NOTES:
1. Dimensions A and B do not include mold flash or protrusion.
2. Maximum mold flash or protrusion 0.15 mm (0.006) per side
for A; for B ‑ 0.25 mm (0.010) per side.
F
M
Symbol
MIN
MAX
A
9.8
10
B
3.8
4
C
1.35
1.75
D
0.33
0.51
F
0.4
1.27
G
1.27
H
5.72
J
0°
8°
K
0.1
0.25
M
0.19
0.25
P
5.8
6.2
R
0.25
0.5
Rev. 00
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