DATA SHEET MOS INTEGRATED CIRCUIT Bipolar Analog Integrated Circuit µPC1555 TIMER CIRCUIT The µPC1555 is a powerful integrated circuit. Adding a few external parts to it can turn it into various types of timing signal generators, such as monostable and astable multivibrators. It has trigger, threshold, and control pins. Inputting a signal to the reset pin can stop the circuit operation easily. In addition, the output can sink current as high as 200 mA (maximum). So, it can be used to drive relays and lamps. TYPICAL CHARACTERISTICS • Supply voltage FEATURES : 4.5 to 16 V • Monostable and astable oscillation • Circuit current (VCC = 5 V) : 3 mA • Interfacing directly with TTL-level signals • Output current capacity : 200 mA • Variable duty cycle • Temperature stability : 0.005%/°C • Rising and falling time : 100 ns ORDERING INFORMATION Part number µPC1555C PIN CONFIGURATION (TOP VIEW) Package 8 VCC GND 1 8-pin plastic DIP (300 mil) µPC1555G2 8-pin plastic SOP (225 mil) Trigger 2 R COMP Flip-flop Output 3 7 Discharge R Output stage 6 Threshold COMP R 5 Control voltage Reset 4 VREF EQUIVALENT CIRCUIT 8 R2 1 kΩ VCC Q6 Q5 6 Q1 Threshold 2 Q2 Q3 5 (3VCC) Control 1 Q11 R3 5 kΩ Q21 R1 10 kΩ 5 kΩ Q8 4 Q25 Q28 R12 3.9 kΩ R4 Q15 Trigger Q27 R6 7.5kΩ Q4 GND 2 Reset 7 Discharge R11 Q22 6.2 kΩ Q7 Q9 3 Q17 Q24 R7 4.7 kΩ Q16 Q10 Q19 Q20 R10 Q23 120 Q18 Q12 Q13 R5 5 kΩ Output R8 100 Ω Q26 R9 3.3kΩ Q14 Document No. G10649EJ6V0DS00 (6th edition) (Previous No. IC-1979) Date Published November 1995 P Printed in Japan © 1986 µPC1555 ABSOLUTE MAXIMUM RATINGS (TA = 25°C) Rated value Parameter Symbol µPC1555C µPC1555G Unit Supply voltage VCC –0.3 to +18 –0.3 to +18 V Input voltage (trigger, threshold, reset, control) VIN –0.3 to VCC + 0.3 –0.3 to VCC + 0.3 V Applicable output voltageNote 4 VO –0.3 to VCC + 0.3 –0.3 to VCC + 0.3 V Output current IO 200Note 1 200Note 1 mA Power dissipation PT 600Note 2 440Note 3 mW Operating temperature TA –20 to +80 –20 to +80 °C Storage temperature Tstg –55 to +125 –55 to +125 °C (output and discharge) Notes 1. Be sure to use the product within the Power dissipation. 2. For TA ≥ 25°C, the total loss is derated at TJ MAX = 125°C and –6 mW/°C. MAX = 125°C and –4.4 mW/°C. (See the PT-TA characteristic curve.) 3. For TA ≥ 25°C, the total loss is derated at TJ (See the PT-TA characteristic curve.) 4. This is an external voltage that can be applied to the output pin without deteriorating the quality of the product or causing damage to the product. Be sure to use the product within the rated value under any conditions where coils are inserted or power is turned on or off. The output voltage that can be obtained during normal operation is within the output saturation voltage range. RECOMMENDED OPERATING CONDITIONS (TA = 25°C) Parameter Symbol Conditions MIN. MAX. Unit 4.5 16 V Supply voltage VCC Oscillation frequency f VCC = 5 to 15 V 0.1 100 k Hz Output pulse width tW (OUT) VCC = 5 to 15 V 10 µ 10 Sec Input voltage (trigger, threshold) VIN 0 VCC V Input voltageNote 5 (control) VIN 3.0 VCC • 1.5 V Reset voltage (high level) Vreset H VCC = 5 to 15 V 1.0 VCC V Reset voltage (low level) Vreset L VCC = 5 to 15 V 0 0.4 V Note 5. This parameter defines the voltage that can be applied when a PWM mode application circuit is configured by applying an external voltage to the control pin. Usually, a capacitance of 0.01 µF is connected as shown in the application circuit. 2 µPC1555 ELECTRICAL CHARACTERISTICS (TA = 25°C, VCC = 5 to 15 V) Parameter Symbol Supply voltage VCC Supply current ICC Conditions MIN. TYP. 4.5 MAX. Unit 16 V VCC = 5 V, RL = ∞, VO = “L”Note 6 0 3 6 mA VCC = 15 V, RL = ∞, VO = “L”Note 6 0 10 15 mA Threshold voltage Vth Threshold current Ith Note 7 Trigger voltage Vtr VCC = 15 V 5 V VCC = 5 V 1.67 V 0.5 µA Trigger current Itr Reset voltage Vreset Reset current Ireset Control voltage Vcont Output saturation voltage “L” VOL 2/3 VCC Note 8 0 0.4 1.0 µA V mA VCC = 15 V 9.0 10 11 V VCC = 5 V 2.6 3.33 4 V VCC = 15 V, ISINK = 10 mA 0 0.1 0.25 V VCC = 15 V, ISINK = 50 mA 0 0.4 0.75 V VCC = 15 V, ISINK = 100 mA 0 2.0 2.5 V VCC = 5 V, ISINK = 5 mA VOH 0.7 0.25 0.1 VCC = 15 V, ISINK = 200 mA Output saturation voltage “H” 0.1 V 2.5 0 VCC = 15 V, ISOURCE = 200 mA 0.1 V 0.35 12.5 V V VCC = 15 V, ISOURCE = 100 mA 12.75 13.3 15.0 V VCC = 5 V, ISOURCE = 100 mA 2.75 3.3 5.0 V Propagation delay (L → H) tPLH 200 ns Propagation delay (H → L) tPHL 200 ns Minimum trigger pulse width tW (tr) VCC = 15 V, Vtr min. = 2.5 V 25 ns Minimum output pulse width tW (OUT) VCC = 15 V, Vtr min. = 2.5 V tW (tr) = 3 µs 6 µs Minimum reset pulse width tw (reset) VCC = 15 V, Vtr min. = 0 V 900 ns Timing error Astable multivibrator Initial accuracy RA, RB = 1 to 100 kΩ 1 % Temperature drift C = 0.1 µF 50 ppm/°C 0.01 %/V Supply voltage drift Notes 6. When the output is “H”, the circuit current decreases by approximately 1 mA (when VCC = 5 V). 7. The maximum allowable value for RA + RB is determined for a supply voltage of 15 V. The maximum value is 20 MΩ. 8. When the reset pin is driven to a low level, discharge TrQ14 is turned on, stopping oscillation (the output state is undefined). 3 µPC1555 CHARACTERISTIC CURVES (TA = 25°C, TYP.) ICC-VCC characteristic 1.2 12 VCC = 15 V 1.0 10 Circuit current ICC (mA) 0.8 0.6 TJ = 125°C 0.4 TI = 25°C 0.2 0 1 2 3 4 5 –20°C 8 TA = 25°C 6 70°C 4 2 0 5 6 10 Minimum trigger pulse voltage Vtr min. (V) ISINK-VOUT characteristic 10 1 3 5 10 1 0.1 0.01 1.0 30 50 100 Output source current ISOURCE (mA) 10 30 50 100 ISINK-VOUT characteristic 10 10 VCC = 10 V –20°C 1 25°C 70°C TA = 25°C 0.1 0.01 1.0 C 70° °C –20 3.0 5.0 10 30 50 100 Output sink current ISINK (mA) Output saturation voltage VOUT (V) Output saturation voltage VOUT (V) 3.0 5.0 Output sink current ISINK (mA) ISINK-VOUT characteristic 4 70°C 70°C TA = 25°C 1 20°C –20°C VCC = 5 V TA = – Output saturation voltage VOUT (V) Output saturation voltage VCC-VOUT (V) ISOURCE-(VCC-VOUT) characteristic 2 0 15 Supply voltage VCC (V) 25°C Minimum trigger pulse width tW (tr) (µs) Minimum trigger pulse width characteristic VCC = 10 V –20°C 1 TA = 25°C 0.1 0.01 1.0 70° C 3.0 5.0 °C –20 10 30 50 100 Output sink current ISINK (mA) µPC1555 Propagation delay characteristic Discharge pin saturation voltage VSAT (mV) 1.2 Propagation delay (µs) TA = 25°C 1.0 0.8 VCC = 5 V 0.6 0.4 VCC = 10 V,15 V 0.2 0 0.1 0.2 Discharge pin ISINK-VSAT characteristic 0.3 1000 Minimum trigger pulse voltage (×VCC) VCC = 5 V –20°C 1.0 0.01 1 10 100 ▲ tW-tW (tr) characteristic 5 VCC = 15 V Vtr min = 2.5 V C Minimum output pulse width trigger pulse width ▲tW (µ s) Total loss PT (mW) 0.1 Discharge pin (pin 7) sink current ISINK (mA) 700 500 G 400 300 200 100 10 25°C 10 PT-TA characteristic 600 TA = 70°C 100 4 3 2 1 0 20 40 60 80 100 2 4 6 8 10 Trigger pulse width tW (tr) (µ s) Ambient temperature TA (°C) ▲ tW-ttr min. characteristic 7 VCC = 15 V tW(tr) = 5 sµ Minimum output pulse width trigger pulse width ▲tW (µ s) 6 5 4 3 2 1 0 1 2 3 4 5 Minimum trigger pulse voltage Vtr min. (V) 5 µPC1555 PIN FUNCTIONS 1. Trigger pin (pin 2) : Supplying one-third of VCC to the trigger pin triggers the circuit, changing the output voltage from low to high. 2. Output pin (pin 3) : The maximum output current is 200 mA. Be careful not to exceed the total loss (see the PT-TA characteristic curve). 3. Reset pin (pin 4) : Supplying 0.4 V or less to the reset pin stops the circuit operation (such as monostable or astable multivibrator operation). When not used, the reset pin should be clamped at 1 V to VCC. 4. Control voltage (pin 5) : This voltage determines the threshold level of the comparator. It is set to two-thirds of VCC. It is possible to configure a PWM (pulse width modulation) or PPM (pulse position modulation) mode application circuit by supplying a control voltage from the outside. When this pin is not in use, it should be bypassed using a capacitor of approximately 0.01 µF for more table circuit operation. 5. Threshold pin (pin 6) : The values of an external capacitor (C) and resistor (R) connected to this pin determine the width of the output pulse. 6. Discharge pin (pin 7) : This pin is used to discharge an external capacitor (if connected). It operates, when the internal flip-flop circuit is turned on, or a reset signal is applied. 6 µPC1555 APPLICATION CIRCUITS (1) Monostable multivibrator Fig. a Monostable Multivibrator Example Fig. b Monostable Response Waveform t = 0.1 ms/DIV VCC = 5 to 15 V Trigger input voltage: 5 V/DIV Note 10 RL R1 4 TRIGGER 8 7 2 µ PC1555 3 OUTPUT 6 Output voltage: 5 V/DIV "H" "H" C1 "L" 5 1 "L" Capacitor (C1) voltage: 2 V/DIV Control voltage 0.01 µ F When the µPC1555 is configured as shown in (R1 = 9.1 kΩ, C1 = 0.01 µ F, RL = 1 kΩ) Fig. a, it functions as a monostable multivibrator. Applying a voltage one-third as high as VCC or less Fig. c Interrelationships among Output (trigger pulseNote 9) to pin 2 (trigger pin) drives the Pulse Width, R1, and C1 (approxi- output to a high level. Under this condition, capacitor mate value obtained by calculation) C1 starts charging through resistor R1. When C1 is 100 charged up to two-thirds as high as VCC, pin 6 (threshold control voltage. If pin 4 (reset pin) is connected to 1 V or higher (for example, by being connected to VCC), the circuit operation can be stopped by switching it from 2 V or higher to a GND level. Ω M Ω 10 M 1 kΩ kΩ 0 10 10 connected to pin 5 functions as a nose filter for the (R1) kΩ repeated. Fig. b shows this operation. A capacitor 1.0 0 pulse is applied to pin 2 again, the same operation is 10 1. C1 starts discharging through pin 7. When a trigger t = 1.1 C1 R1 Capacitor C1 capacitance (µF) pin) is turned on and inverted to a low level. At this point, 0.1 0.01 0.001 10 µs 100 1.0 µ s ms The output pulse width (delay) is determined theoretically by (see Fig. c): 10 100 1.0 ms ms s 10 s Output pulse width t t = 1.1 • C1 • R1 The value obtained by this equation is only an approximate value, however. If it is necessary to obtain an accurate output pulse width, determine R1 and C1 through actual measurement and confirmation; a trimmer should be used as required. Moreover, R1 should be 300 Ω or higher. Notes 9. Keep the trigger pulse width smaller than the output pulse width. 10. If the load is connected across the output and GND pins, a “staircase” occurs in the output waveform. The application circuits and their parameters are for references only and are not intended for use in actual design-in's. 7 µPC1555 (2) Astable multivibrator example Fig. d Astable Multivibrator Example Fig. e Astable Multivibrator Response Waveform t = 0.5 ms/DIV VCC = 5 to 15 V Note 10 Output voltage: 5 V/DIV RL R1 4 "H" "H" 8 "L" "L" 7 3 OUTPUT "H" µ PC1555 5 Capacitor (C1) voltage: 1.7 V/DIV R2 6 1 2 Control voltage 0.01 µ F C1 (R1 = R2 = 4.8 kΩ, C1 = 0.1 µ F, RL = 1 kΩ) When the µPC1555 is used in a circuit configuration Fig. f Interrelationships among Oscillation shown in Fig. d, the circuit is triggered by itself to Frequency, R1, R2, and C1 operate as an astable multivibrator, because pin 2 (approximate value obtained by (trigger pin) and pin 6 (threshold pin) are connected to calculation) each other. When the output voltage is high, capacitor 100 C1 is charged through R1 and R2. When C1 is charged Capacitor C1 capacitance (µ F) up to a voltage two-thirds as high as VCC, the threshold pin is turned on, and the output pin becomes low. At this point C1 starts discharging through R2. When C1 10 10 0 kΩ kΩ kΩ Ω (R1 + 2R2) 0.01 0.001 0.1 VCC and two-thirds as high as VCC, the oscillation 10 0.1 M Ω This operation is shown in Fig. e. Because C1 repeats charging and discharging between one-third as high as 0 charge current to flow into C1 through R1 and R2 again. M on, and the output voltage becomes high, causing the 1. voltage one-third as high as VCC, the trigger pin is turned 1.0 10 discharges, and the voltage across C1 decreases to a 10 1.0 10 100 1.0 k 10 k 100 k Oscillation frequency f (Hz) (Free running frequency) frequency is not affected by the supply voltage. Oscillation is represented theoretically using the following expressions. When the output voltage is high, the charge time is : t1 = 0.693 (R1 + R2) C1 .......................................... (1) When the output voltage is low, the discharge time is : t2 = 0.693 • R2 • C1 ................................................. (2) Adding expressions (1) and (2) determines period T : T = t1 + t2 = 0.693 (R1 + 2R2) C1 .......................... (3) Therefore, the oscillation frequency is (see Fig. f for reference) The duty cycle is determined by the equation (5) : f= : D= 1 T = 1.44 (R1 + 2R2) C1 R2 R1 + 2R2 ...................................... (4) ........................................................ (5) The values obtained this way are approximate values, however. If it is necessary to obtain an accurate oscillation frequency, determine R1, R2, and C1 through actual measurement and confirmation; a trimmer should be used as required. Moreover, R1 and R2 should be 300 Ω or higher. Note 10. If the load is connected across the output and GND pins, a “staircase” occurs in the output waveform. 8 µPC1555 8PIN PLASTIC DIP (300 mil) 8 5 1 4 A K I L P J C H G B M R F D N M NOTES 1) Each lead centerline is located within 0.25 mm (0.01 inch) of its true position (T.P.) at maximum material condition. 2) ltem "K" to center of leads when formed parallel. ITEM MILLIMETERS INCHES A B 10.16 MAX. 1.27 MAX. 0.400 MAX. 0.050 MAX. C 2.54 (T.P.) 0.100 (T.P.) D 0.50±0.10 0.020 +0.004 –0.005 F 1.4 MIN. 0.055 MIN. G H 3.2±0.3 0.51 MIN. 0.126±0.012 0.020 MIN. I J 4.31 MAX. 5.08 MAX. 0.170 MAX. 0.200 MAX. K 7.62 (T.P.) 0.300 (T.P.) L 6.4 0.252 M 0.25 +0.10 –0.05 0.010 +0.004 –0.003 N 0.25 0.01 P 0.9 MIN. 0.035 MIN. R 0~15° 0~15° P8C-100-300B,C-1 9 µPC1555 8 PIN PLASTIC SOP (225 mil) 8 5 P detail of lead end 4 1 A H J E K F G I B L N C D M M NOTE Each lead centerline is located within 0.12 mm (0.005 inch) of its true position (T.P.) at maximum material condition. ITEM MILLIMETERS INCHES A 5.37 MAX. 0.212 MAX. B 0.78 MAX. 0.031 MAX. C 1.27 (T.P.) 0.050 (T.P.) D 0.40 +0.10 –0.05 0.016 +0.004 –0.003 E 0.1±0.1 0.004±0.004 F 1.8 MAX. 0.071 MAX. G 1.49 0.059 H 6.5±0.3 0.256±0.012 I 4.4 0.173 J 1.1 0.043 K 0.15 +0.10 –0.05 0.006 +0.004 –0.002 L 0.6±0.2 0.024 +0.008 –0.009 M 0.12 0.005 N 0.10 0.004 P 3° +7° –3° 3° +7° –3° S8GM-50-225B-4 10 µPC1555 RECOMMENDED SOLDERING CONDITIONS The conditions listed below shall be met when soldering the µPC1555. Please consult with our sales offices in case any other soldering process is used, or in case soldering is done under different conditions. Surface-Mount Devices For details of the recommended soldering conditions, refer to our document SMD Surface Mount Technology Manual (IEI-1207). µPC1555G2 Soldering process Infrared reflow Soldering conditions Peak package’s surface temperature: 230°C Reflow time: 30 seconds or less (at 210°C or more) Maximum allowable number of reflow processes: 1 Symbol IR30-00 Exposure limit: NoneNote VPS Peak package’s surface temperature: 215°C Reflow time: 40 seconds or less (at 200°C or more) Maximum allowable number of reflow processes: 1 Exposure limit: NoneNote VP15-00 Wave soldering Temperature in the soldering vessel: 260°C or less Soldering time: 10 seconds or less Maximum allowable number of reflow processes: 1 Exposure limit: NoneNote WS60-00 Partial heating method Pin temperature: 300°C or less Flow time: 10 seconds or less Exposure limit: NoneNote Note Exposure limit before soldering after dry-pack package is opened. Storage conditions: Temperature of 25°C or less and maximum relative humidity of 65% or less Caution Do not apply more than a single process at once, except for “Partial heating method.” Through-Hole Mount Devices µPC1555C Soldering process Wave soldering Soldering conditions Temperature in the soldering vessel: 260°C or less Soldering time: 10 seconds or less REFERENCE Document name Document No. NEC Semiconductor Device Reliability/Quality Control System IEI-1212 Quality Grade on NEC Semiconductor Devices IEI-1209 Semiconductor Device Mounting Technology Manual IEI-1207 Semiconductor Device Package Manual IEI-1213 Guide to Quality Assurance for Semiconductor Devices MEI-1202 Semiconductor Selection Guide MF-1134 11 µPC1555 [MEMO] No part of this document may be copied or reproduced in any form or by any means without the prior written consent of NEC Corporation. NEC Corporation assumes no responsibility for any errors which may appear in this document. NEC Corporation does not assume any liability for infringement of patents, copyrights or other intellectual property rights of third parties by or arising from use of a device described herein or any other liability arising from use of such device. No license, either express, implied or otherwise, is granted under any patents, copyrights or other intellectual property rights of NEC Corporation or others. While NEC Corporation has been making continuous effort to enhance the reliability of its semiconductor devices, the possibility of defects cannot be eliminated entirely. To minimize risks of damage or injury to persons or property arising from a defect in an NEC semiconductor device, customer must incorporate sufficient safety measures in its design, such as redundancy, fire-containment, and anti-failure features. NEC devices are classified into the following three quality grades: “Standard“, “Special“, and “Specific“. The Specific quality grade applies only to devices developed based on a customer designated “quality assurance program“ for a specific application. The recommended applications of a device depend on its quality grade, as indicated below. Customers must check the quality grade of each device before using it in a particular application. Standard: Computers, office equipment, communications equipment, test and measurement equipment, audio and visual equipment, home electronic appliances, machine tools, personal electronic equipment and industrial robots Special: Transportation equipment (automobiles, trains, ships, etc.), traffic control systems, anti-disaster systems, anti-crime systems, safety equipment and medical equipment (not specifically designed for life support) Specific: Aircrafts, aerospace equipment, submersible repeaters, nuclear reactor control systems, life support systems or medical equipment for life support, etc. The quality grade of NEC devices in “Standard“ unless otherwise specified in NEC's Data Sheets or Data Books. If customers intend to use NEC devices for applications other than those specified for Standard quality grade, they should contact NEC Sales Representative in advance. Anti-radioactive design is not implemented in this product. M4 94.11