M54HC123/123A M74HC123/123A DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR . . . . . . . . . HIGH SPEED tPD = 25 ns (TYP) at VCC = 5V LOW POWER DISSIPATION STANDBY STATE ICC=4 µA (MAX.) AT TA=25°C ACTIVE STATE ICC = 200 µA (TYP.) AT VCC=5V HIGH NOISE IMMUNITY VNIH = VNIL = 28 % VCC (MIN.) OUTPUT DRIVE CAPABILITY 10 LSTTL LOADS SYMMETRICAL OUTPUT IMPEDANCE IOH = IOL = 4 mA (MIN.) BALANCED PROPAGATION DELAYS tPLH = tPHL WIDE OPERATING VOLTAGE RANGE VCC (OPR) = 2 V TO 6 V WIDE OUTPUT PULSE WIDTH RANGE tWOUT = 120 ns ∼ 60 s OVER AT VCC = 4.5 V PIN AND FUNCTION COMPATIBLE WITH 54/74LS123 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 ≥ 10KΩ, 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 Ω to 1 M Ω VCC ≥ 3.0 V 1 K Ω to 1 M Ω All inputs are equipped with protection circuits October 1993 B1R (Plastic Package) F1R (Ceramic Package) M1R (Micro Package) C1R (Chip Carrier) ORDER CODES : M54HCXXXF1R M74HCXXXM1R M74HCXXXB1R M74HCXXXC1R PIN CONNECTIONS (top view) NC = No Internal Connection 1/14 M54/M74HC123/123A SYSTEM DIAGRAM TIMING CHART 2/14 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) 3/14 M54/M74HC123/123A FUNCTIONAL DESCRIPTION (continued) mum time for a second trigger to be effective depends on VCC and Cx. 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 mini- 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. TRUTH TABLE INPUTS OUTPUTS B CL X H L H H L H H X H L H L L H X X Q H L X: Don’t Care Z: High Impedance INPUT AND OUTPUT EQUIVALENT CIRCUIT 4/14 Q NOTE A OUTPUT ENABLE INHIBIT INHIBIT OUTPUT ENABLE OUTPUT ENABLE L H INHIBIT M54/M74HC123/123A PIN DESCRIPTION IEC LOGIC SYMBOL PIN No SYMBOL NAME AND FUNCTION 1, 9 1A, 2A 2, 10 1B, 2B 3, 11 1CLR, 2CLR 4, 12 1Q, 2Q Trigger Inputs (Negative Edge Triggered) Trigger Inputs (Positive Edge Triggered) Direct Reset LOW and Trigger Action at Positive Edge Outputs (Active LOW) 7 2REXT/CEXT External Resistor Capacitor Connection 13, 5 14, 6 1Q, 2Q 1CEXT 2CEXT Outputs (Active HIGH) External Capacitor Connection 15 1REXT/CEXT External Resistor Capacitor Connection 8 GND Ground (0V) 16 V CC Positive Supply Voltage ABSOLUTE MAXIMUM RATING Symbol Parameter Value Unit -0.5 to +7 V -0.5 to VCC + 0.5 -0.5 to VCC + 0.5 V V DC Input Diode Current DC Output Diode Current ± 20 ± 20 mA mA DC Output Source Sink Current Per Output Pin ± 25 mA ± 50 500 (*) mA mW VCC Supply Voltage VI VO DC Input Voltage DC Output Voltage IIK IOK IO ICC or IGND PD Tstg TL DC VCC or Ground Current Power Dissipation Storage Temperature Lead Temperature (10 sec) -65 to +150 o C 300 o 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 5/14 M54/M74HC123/123A RECOMMENDED OPERATING CONDITIONS Symbol Parameter VCC VI Supply Voltage Input Voltage VO Output Voltage Top Operating Temperature: M54HC Series M74HC Series Input Rise and Fall Time tr, tf Value Unit 2 to 6 0 to VCC V V 0 to VCC V o -55 to +125 -40 to +85 0 to 1000 C C ns o 0 to 500 0 to 400 CX External Capacitor RX External Resistor NO LIMITATION pF VCC < 3 V 5K to 1M Ω VCC ≥ 3 V 1K to 1M (*) 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 Conditions Symbol VIH V IL V OH Parameter High Level Input Voltage Low Level Input Voltage High Level Output Voltage VCC (V) Low Level Output Voltage 2.0 1.5 1.5 1.5 3.15 4.2 3.15 4.2 3.15 4.2 0.5 0.5 0.5 4.5 6.0 1.35 1.8 1.35 1.8 1.35 1.8 2.0 4.5 6.0 6.0 2.0 4.5 4.5 6.0 II Input Leakage Current R/C Terminal Off State Current 6.0 6.0 2.0 1.9 1.9 4.4 5.9 4.5 6.0 4.4 5.9 4.4 5.9 4.18 4.31 4.13 4.10 5.68 5.8 0.0 0.1 0.1 0.1 0.0 0.1 0.1 0.1 0.0 0.1 0.1 0.1 0.17 0.26 0.33 0.40 0.18 0.26 ±0.1 0.33 ±1 0.40 ±1 µA VI = VCC or GND ±0.1 ±1 ±1 µA 4 40 80 µA 45 200 260 320 µA 500 0.7 600 1 780 1.3 960 1.6 µA mA IO=-5.2 mA VI = IO= 20 µA VIH or V IL IO= 4.0 mA IO= 5.2 mA VI = VCC or GND Quiescent Supply Current 6.0 VI = VCC or GND ICC’ Active State Supply Current (1) 2.0 VI = VCC or GND Pin 7 or 15 VIN = VCC/2 (1): Per Circuit 6/14 V 1.9 VI = IO=-20 µA VIH or V IL IO=-4.0 mA ICC 4.5 6.0 Unit V 2.0 6.0 II Value -40 to 85 oC -55 to 125 oC 74HC 54HC Min. Max. Min. Max. 4.5 6.0 4.5 VOL TA = 25 oC 54HC and 74HC Min. Typ. Max. 5.63 V 5.60 V M54/M74HC123/123A AC ELECTRICAL CHARACTERISTICS (C L = 50 pF, Input t r = tf = 6 ns) Test Conditions Symbol Parameter tTLH tTHL Output Transition Time tPLH tPHL tPLH tPHL tPLH tPHL tWOUT tWOUT ∆tWOUT tW(H) tW(L) tW(L) trr CIN CPD (*) VCC (V) 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 CX = 100 pF RX = 10 KΩ CX = 0.1 µF RX = 100 KΩ CX = 100 pF RX = 10 KΩ CX = 0.1 µF RX = 100 KΩ 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 ns ns ns ns µs ms µs ms % 75 15 13 75 15 13 CX = 100 pF RX = 1 KΩ CX = 0.1 µF RX = 100 KΩ 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 µs 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:%) 7/14 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) 8/14 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 9/14 M54/M74HC123/123A Plastic DIP16 (0.25) MECHANICAL DATA mm DIM. MIN. a1 0.51 B 0.77 TYP. inch MAX. MIN. TYP. MAX. 0.020 1.65 0.030 0.065 b 0.5 0.020 b1 0.25 0.010 D 20 0.787 E 8.5 0.335 e 2.54 0.100 e3 17.78 0.700 F 7.1 0.280 I 5.1 0.201 L Z 3.3 0.130 1.27 0.050 P001C 10/14 M54/M74HC123/123A Ceramic DIP16/1 MECHANICAL DATA mm DIM. MIN. TYP. inch MAX. MIN. TYP. MAX. A 20 0.787 B 7 0.276 D E 3.3 0.130 0.38 e3 0.015 17.78 0.700 F 2.29 2.79 0.090 0.110 G 0.4 0.55 0.016 0.022 H 1.17 1.52 0.046 0.060 L 0.22 0.31 0.009 0.012 M 0.51 1.27 0.020 0.050 N P Q 10.3 7.8 8.05 5.08 0.406 0.307 0.317 0.200 P053D 11/14 M54/M74HC123/123A SO16 (Narrow) MECHANICAL DATA mm DIM. MIN. TYP. A a1 inch MAX. MIN. TYP. 1.75 0.1 0.068 0.2 a2 MAX. 0.004 0.007 1.65 0.064 b 0.35 0.46 0.013 0.018 b1 0.19 0.25 0.007 0.010 C 0.5 0.019 c1 45° (typ.) D 9.8 E 5.8 10 0.385 6.2 0.228 0.393 0.244 e 1.27 0.050 e3 8.89 0.350 F 3.8 4.0 0.149 0.157 G 4.6 5.3 0.181 0.208 L 0.5 1.27 0.019 0.050 M S 0.62 0.024 8° (max.) P013H 12/14 M54/M74HC123/123A PLCC20 MECHANICAL DATA mm DIM. MIN. TYP. inch MAX. MIN. TYP. MAX. A 9.78 10.03 0.385 0.395 B 8.89 9.04 0.350 0.356 D 4.2 4.57 0.165 0.180 d1 2.54 0.100 d2 0.56 0.022 E 7.37 8.38 0.290 0.330 e 1.27 0.050 e3 5.08 0.200 F 0.38 0.015 G 0.101 0.004 M 1.27 0.050 M1 1.14 0.045 P027A 13/14 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. 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 14/14