M54HC4538 RAD HARD DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR ■ ■ ■ ■ ■ ■ ■ ■ ■ HIGH SPEED: tPD = 25 ns (TYP.) at VCC = 6V LOW POWER DISSIPATION: STAND BY STATE: ICC=4µA (MAX.) at TA=25°C ACTIVE STATE: ICC=200µA (TYP.) at VCC = 6V 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 4538 DEVICE FULLY COMPLIANT WITH SCC-9207-008 DESCRIPTION The M54HC4538 is an high speed CMOS MONOSTABLE MULTIVIBRATOR fabricated with silicon gate C2MOS technology. Each multivibrator features both a negative A, and a positive B, edge triggered input, either of which can be used as an inhibit input. Also included is a DILC-16 FPC-16 ORDER CODES PACKAGE FM EM DILC FPC M54HC4538D M54HC4538K M54HC4538D1 M54HC4538K1 clear input that when taken low resets the one shot. The monostable multivibrator are retriggerable. That is, they may be triggered repeatedly while their outputs are generating a pulse and the pulse will be extended. Pulse width stability over a wide range of temperature and supply is achieved using linear CMOS techniques. The output pulse equation is simply: PW = 0.7 (R)(C) where PW is in seconds, R in Ohms and C is in Farads. All inputs are equipped with protection circuits against static discharge and transient excess voltage. PIN CONNECTION June 2004 Rev. 1 1/13 M54HC4538 Figure 1: IEC Logic Symbols Figure 2: Input And Output Equivalent Circuit Table 1: Pin Description PIN N° SYMBOL 1, 15 1T1, 2T1 2, 14 1T2, 2T2 3, 13 1CD, 2CD 4, 12 1A, 2A 5, 11 1B, 2B 6, 10 Q1, Q2 7, 9 Q1, Q2 8 GND VCC 16 NAME AND FUNCTION External Capacitor Connections External Resistor/ Capacitor Connections Direct Reset Inputs (Active Low) Trigger Inputs (LOW to HIGH, Edge-Triggered) Trigger Inputs (HIGH to LOW, Edge Triggered) Pulse Outputs Complementary Pulse Outputs Ground (0V) Positive Supply Voltage Table 2: TRUTH TABLE INPUTS OUTPUTS NOTE A X H B CD H H L X H H L X X : Don’t Care 2/13 Q Q OUTPUT ENABLE L L H H L H H X L INHIBIT INHIBIT OUTPUT ENABLE INHIBIT M54HC4538 Figure 3: System Diagram This logic diagram has not be used to estimate propagation delays Figure 4: Timing Chart 3/13 M54HC4538 Figure 5: 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; 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 Rx/Cx 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 output goes low and G goes low. C2 stop 4/13 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) = 0.72 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 Rx/Cx 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, trr (MIN.) depends on VCC and Cx RESET OPERATION CD is normally high. If CD 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 CD input goes low the IC becomes waiting state both in operating and non operating state. M54HC4538 Table 3: 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 ± 20 V mA ± 20 mA IIK DC Input Diode Current IOK DC Output Diode Current IO DC Output Current ICC or IGND DC VCC or Ground Current Power Dissipation PD Tstg Storage Temperature TL Lead Temperature (10 sec) ± 25 mA ± 50 mA 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 Table 4: 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 (CD only) tr, tf -55 to 125 °C VCC = 2.0V 0 to 1000 ns VCC = 4.5V 0 to 500 ns VCC = 6.0V Cx Rx External Capacitor External Resistor 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 5/13 M54HC4538 Table 5: DC Specifications Test Condition Symbol VIH VIL VOH VOL II II ICC ICC 6/13 Parameter High Level Input Voltage Low Level Input Voltage High Level Output Voltage Low Level Output Voltage Input Leakage Current Input Leakage Current Quiescent Supply Current Quiescent Supply Current Value TA = 25°C VCC (V) Min. 2.0 4.5 6.0 2.0 4.5 6.0 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 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 V V 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 Rext/Cext ± 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 2 or 14 VIN = VCC/2 120 0.3 0.6 160 0.4 0.8 200 0.6 1.0 µA mA mA 40 0.2 0.3 V M54HC4538 Table 6: AC Electrical Characteristics (CL = 50 pF, Input tr = tf = 6ns) Test Condition Symbol Parameter tTLH tTHL Output Transition Time tPLH tPHL Propagation Delay Time (A, B - Q, Q) tPLH tPHL Propagation Delay Time (CD - Q, Q) tWOUT ∆tWOUT tW(H) tW(L) tW(L) tREM trr Output Pulse Width Output Pulse Width Error Between Circuits in Same Package Minimum Pulse Width (A,B) Minimum Pulse Width (CD) Minimum Clear Removal Time Minimum Retrigger Time TA = 25°C VCC (V) 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 Cx=0 Min. Typ. Max. 70 69 69 0.67 0.67 0.67 30 8 7 120 30 25 100 25 20 540 180 150 83 77 77 0.75 0.73 0.73 75 15 13 250 50 43 195 39 33 1200 250 200 96 85 85 0.83 0.77 0.77 Rx = 5KΩ Rx = 1KΩ Rx= 1KΩ Cx = 0.01µF Rx = 10KΩ Cx = 0.1µF Rx = 10KΩ -40 to 85°C -55 to 125°C Min. Max. Min. Max. 70 69 69 0.67 0.67 0.67 95 19 16 315 63 54 245 49 42 1500 320 260 96 85 85 0.83 0.77 0.77 70 69 69 0.67 0.67 0.67 110 22 19 375 75 64 295 59 50 1800 375 320 96 85 85 0.9 0.8 0.8 ±1 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 Cx = 0.1 µF Rx = 1KΩ Cx = 0.01µF Rx = 1KΩ 30 8 7 30 8 7 0 0 0 380 92 72 6 1.4 1.2 Unit ns ns ns ns µs ms % 75 15 13 75 15 13 15 5 5 95 19 16 95 19 16 15 5 5 110 22 19 110 22 19 20 7 ns ns ns ns µs 7/13 M54HC4538 Table 7: Capacitive Characteristics Test Condition Symbol Parameter VCC (V) Value TA = 25°C Min. Typ. Max. 10 CIN Input Capacitance 5.0 5 CPD Power Dissipation Capacitance (note 1) 5.0 70 -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:%) Figure 6: Test Circuit CL = 50pF or equivalent (includes jig and probe capacitance) RT = ZOUT of pulse generator (typically 50Ω) 8/13 M54HC4538 Figure 7: Switching Characteristics Test Waveform (f=1MHz; 50% duty cycle) 9/13 M54HC4538 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 e 0.88 2.54 0.035 0.045 0.094 0.100 e1 17.65 17.78 17.90 0.695 0.700 0.705 e2 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 10/13 M54HC4538 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 M C 0016030E 11/13 M54HC4538 Table 8: Revision History Date Revision 16-Jun-2004 1 12/13 Description of Changes First Release M54HC4538 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics All other names are the property of their respective owners © 2004 STMicroelectronics - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States. http://www.st.com 13/13