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M54HC123/123A M74HC123/123A
DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR
.HI .LOWPOWERDI .HI .OUTPUTDRI .SYMMETRI .BALANCEDPROPAGATI .WI .WI .PI
GH SPEED tPD = 25 ns (TYP) at VCC = 5V SSIPATION STANDBY STATE ICC=4 A (MAX.) AT TA=25C ACTIVE STATE ICC = 200 A (TYP.) AT VCC=5V GH NOISE IMMUNITY VNIH = VNIL = 28 % VCC (MIN.) VE CAPABILITY 10 LSTTL LOADS CAL OUTPUT IMPEDANCE IOH = IOL = 4 mA (MIN.) ON DELAYS tPLH = tPHL DE OPERATING VOLTAGE RANGE VCC (OPR) = 2 V TO 6 V DE OUTPUT PULSE WIDTH RANGE tWOUT = 120 ns 60 s OVER AT VCC = 4.5 V N AND FUNCTION COMPATIBLE WITH 54/74LS123
B1R (Plastic Package)
F1R (Ceramic Package)
M1R (Micro Package)
C1R (Chip Carrier)
ORDER CODES : M54HCXXXF1R M74HCXXXM1R M74HCXXXB1R M74HCXXXC1R
DESCRIPTION The M54/74HC123 is a high speed CMOS MONOSTABLE multivibrator fabricated with silicon gate C2MOS technology. It achieves 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 8 INPUT (positive edge). These inputs are valid for slow rising/falling signals, (tr = tf = I 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 10K, the output pulse width value is approssimatively given by the formula: tw(out) = K * Cx * Rx. Two different pulse width constant are available: K 0.45 for HC123 K 1 for HC123A. 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 : VCC < 3.0 V 5 K to 1 M VCC 3.0 V 1 K to 1 M All inputs are equipped with protection circuits
PIN CONNECTIONS (top view)
NC = No Internal Connection
October 1993
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M54/M74HC123/123A
SYSTEM DIAGRAM
TIMING CHART
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M54/M74HC123/123A
BLOCK DIAGRAM
Note : (1) Cx, Rx, Dx are external components. (2) Dx is a clamping diode. The external capacitor is charged to VCC inthe stand-by state, i.e. no trigger. When the supply voltage is turned off Cx is discharged mainly through an internal parasitic diode (see figures). 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. 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) 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 resets 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 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) = 0.46 Cx Rx (HC123) tW(OUT) = Cx Rx (HC123A)
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M54/M74HC123/123A
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 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 miniTRUTH TABLE
INPUTS A X H L L X B H L X H X L L H CL H H H H Q L L OUTPUTS Q H H OUTPUT ENABLE INHIBIT INHIBIT OUTPUT ENABLE OUTPUT ENABLE INHIBIT NOTE
mum 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 quicky to VCC. This means if CL input goes low, the IC becomes waiting state both in operating and non operating state.
X: Don't Care Z: High Impedance
INPUT AND OUTPUT EQUIVALENT CIRCUIT
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M54/M74HC123/123A
PIN DESCRIPTION
PIN No 1, 9 2, 10 3, 11 SYMBOL 1A, 2A 1B, 2B 1CLR, 2CLR 1Q, 2Q 2REXT/CEXT 1Q, 2Q 1CEXT 2CEXT 1REXT/CEXT GND V CC 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
IEC LOGIC SYMBOL
4, 12 7 13, 5 14, 6 15 8 16
ABSOLUTE MAXIMUM RATING
Symbol VCC VI VO IIK IOK IO ICC or IGND PD Tstg TL Supply Voltage DC Input Voltage DC Output Voltage DC Input Diode Current DC Output Diode Current DC Output Source Sink Current Per Output Pin DC VCC or Ground Current Power Dissipation Storage Temperature Lead Temperature (10 sec) Parameter Value -0.5 to +7 -0.5 to VCC + 0.5 -0.5 to VCC + 0.5 20 20 25 50 500 (*) -65 to +150 300 Unit V V V mA mA mA mA mW
o o
C C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition isnotimplied. (*) 500 mW: 65 oC derate to 300 mW by 10mW/oC: 65 oC to 85 oC
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M54/M74HC123/123A
RECOMMENDED OPERATING CONDITIONS
Symbol VCC VI VO Top tr, tf Supply Voltage Input Voltage Output Voltage Operating Temperature: M54HC Series M74HC Series Input Rise and Fall Time Parameter Value 2 to 6 0 to VCC 0 to VCC -55 to +125 -40 to +85 0 to 1000 0 to 500 0 to 400 CX RX External Capacitor External Resistor VCC < 3 V VCC 3 V NO LIMITATION 5K to 1M 1K to 1M
pF
Unit V V V
o o
C C ns
(*) 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 > 1M
DC SPECIFICATIONS
Test Conditions Symbol Parameter VCC (V) 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 4.5 VOL Low Level Output Voltage 6.0 2.0 4.5 6.0 4.5 6.0 II II ICC ICC' Input Leakage Current R/C Terminal Off State Current Quiescent Supply Current Active State Supply Current (1) 6.0 6.0 6.0 2.0 4.5 6.0 VI = IO=-20 A VIH or V IL IO=-4.0 mA IO=-5.2 mA VI = IO= 20 A VIH or V IL IO= 4.0 mA IO= 5.2 mA VI = VCC or GND VI = VCC or GND VI = VCC or GND VI = VCC or GND Pin 7 or 15 VIN = VCC/2 45 500 0.7 1.9 4.4 5.9 4.18 5.68 2.0 4.5 6.0 4.31 5.8 0.0 0.0 0.0 0.17 0.18 0.1 0.1 0.1 0.26 0.26 0.1 0.1 4 200 600 1 TA = 25 oC 54HC and 74HC Min. Typ. Max. 1.5 3.15 4.2 0.5 1.35 1.8 1.9 4.4 5.9 4.13 5.63 0.1 0.1 0.1 0.33 0.33 1 1 40 260 780 1.3 Value -40 to 85 oC -55 to 125 oC 74HC 54HC Min. Max. Min. Max. 1.5 3.15 4.2 0.5 1.35 1.8 1.9 4.4 5.9 4.10 5.60 0.1 0.1 0.1 0.40 0.40 1 1 80 320 960 1.6 A A A A A mA V V 1.5 3.15 4.2 0.5 1.35 1.8 V V
Unit
VIH
High Level Input Voltage Low Level Input Voltage High Level Output Voltage
V IL
V OH
(1): Per Circuit
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M54/M74HC123/123A
AC ELECTRICAL CHARACTERISTICS (C L = 50 pF, Input t r = tf = 6 ns)
Test Conditions Symbol Parameter VCC (V) TA = 25 oC 54HC and 74HC Min. Typ. Max. 30 75 8 15 7 13 102 210 29 42 22 36 102 235 31 47 23 40 68 160 20 32 16 27 1.4 1.2 1.1 4.6 4.4 4.3 1.9 1.6 1.5 9.8 9.5 9.4 1 Value -40 to 85 oC -55 to 125 oC 74HC 54HC Min. Max. Min. Max. 95 110 19 22 16 19 265 315 53 63 45 54 295 355 59 71 50 60 200 240 40 48 34 41
Unit
tTLH tTHL tPLH tPHL tPLH tPHL tPLH tPHL tWOUT
tWOUT
tWOUT
tW(H) tW(L) tW(L)
trr
CIN CPD (*)
2.0 4.5 6.0 Propagation 2.0 Delay Time 4.5 (A, B - Q, Q) 6.0 Propagation 2.0 Delay Time 4.5 (CLRTRIGGER- Q,Q) 6.0 Propagation 2.0 Delay Time 4.5 (CLR - Q, Q) 6.0 Output Pulse 2.0 Width 4.5 (for HC123) 6.0 2.0 4.5 6.0 Output Pulse 2.0 Width 4.5 (for HC123A) 6.0 2.0 4.5 6.0 Output Pulse Width Error Between Circuits in Same Package Minimum Pulse 2.0 Width 4.5 6.0 Minimum Pulse 2.0 Width (CLR) 4.5 6.0 Minimum 2.0 Retrigger Time 4.5 6.0 2.0 4.5 6.0 Input Capacitance Power Dissipation Capacitance
Output Transition Time
ns
ns
ns
ns
CX = 100 pF RX = 10 K CX = 0.1 F RX = 100 K CX = 100 pF RX = 10 K CX = 0.1 F RX = 100 K
s
ms
s
ms
% 75 15 13 75 15 13 CX = 100 pF RX = 1 K CX = 0.1 F RX = 100 K 325 108 78 5 1.4 1.2 5 162 95 19 16 95 19 16 110 22 19 110 22 19
ns
ns
ns
s 10 10 10 pF pF
(*) CPD is defined as the value of the IC's internal equivalent capacitance which is calculated from the operating current consumption without load. (RefertoTestCircuit). Average operting current canbeobtained by thefollowing equation. ICC(opr) =CPD *VCC *fIN +ICC' Duty/100 + IC/2 (per monostable) (ICC': Active Supply Current) (Duty:%)
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M54/M74HC123/123A
Output Pulse Width Constant Characteristics (for HC123) Output Pulse Width Constant Characteristics (for HC123A)
Output Pulse Width Characteristics (for HC123)
Output Pulse Width Characteristics (for HC123A)
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M54/M74HC123/123A
TEST CIRCUIT ICC (Opr)
* TRANSITION TIME OF INPUT WAVEFORM IS THE SAME AS THAT IN SASE OF SWITCHINGCHARACTERISTICS TESTS.
SWITCHING CHARACTERISTICS TEST WAVEFORM
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M54/M74HC123/123A
Plastic DIP16 (0.25) MECHANICAL DATA
mm MIN. a1 B b b1 D E e e3 F I L Z 3.3 1.27 8.5 2.54 17.78 7.1 5.1 0.130 0.050 0.51 0.77 0.5 0.25 20 0.335 0.100 0.700 0.280 0.201 1.65 TYP. MAX. MIN. 0.020 0.030 0.020 0.010 0.787 0.065 inch TYP. MAX.
DIM.
P001C
10/14
M54/M74HC123/123A
Ceramic DIP16/1 MECHANICAL DATA
mm MIN. A B D E e3 F G H L M N P Q 7.8 2.29 0.4 1.17 0.22 0.51 0.38 17.78 2.79 0.55 1.52 0.31 1.27 10.3 8.05 5.08 0.307 0.090 0.016 0.046 0.009 0.020 3.3 0.015 0.700 0.110 0.022 0.060 0.012 0.050 0.406 0.317 0.200 TYP. MAX. 20 7 0.130 MIN. inch TYP. MAX. 0.787 0.276
DIM.
P053D
11/14
M54/M74HC123/123A
SO16 (Narrow) MECHANICAL DATA
DIM. MIN. A a1 a2 b b1 C c1 D E e e3 F G L M S 3.8 4.6 0.5 9.8 5.8 1.27 8.89 4.0 5.3 1.27 0.62 8 (max.) 0.149 0.181 0.019 10 6.2 0.35 0.19 0.5 45 (typ.) 0.385 0.228 0.050 0.350 0.157 0.208 0.050 0.024 0.393 0.244 0.1 mm TYP. MAX. 1.75 0.2 1.65 0.46 0.25 0.013 0.007 0.019 0.004 MIN. inch TYP. MAX. 0.068 0.007 0.064 0.018 0.010
P013H
12/14
M54/M74HC123/123A
PLCC20 MECHANICAL DATA
mm MIN. A B D d1 d2 E e e3 F G M M1 1.27 1.14 7.37 1.27 5.08 0.38 0.101 0.050 0.045 9.78 8.89 4.2 2.54 0.56 8.38 0.290 0.050 0.200 0.015 0.004 TYP. MAX. 10.03 9.04 4.57 MIN. 0.385 0.350 0.165 0.100 0.022 0.330 inch TYP. MAX. 0.395 0.356 0.180
DIM.
P027A
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M54/M74HC123/123A
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 its use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use ascritical components in life support devices or systems without express written approval of SGS-THOMSON Microelectonics. (c) 1994 SGS-THOMSON Microelectronics - All Rights Reserved SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A
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