TS3V555 3V LOW POWER SINGLE TIMERS . . . .. .. . DEDICATED TO 3.3V OR BATTERY SUPPLY (Specified at 3V and 5V) VERY LOW POWER CONSUMPTION : 90µA at VCC = 3V WIDE SINGLE SUPPLY RANGE : +2.7V to +16V HIGH OUTPUT CURRENT CAPABILITY SUPPLY CURRENT SPIKES REDUCED DURING OUTPUT TRANSITIONS HIGH INPUT IMPEDANCE : 1012 Ω PIN-TO-PIN AND FUNCTIONALLY COMPATIBLE WITH BIPOLAR NE555 AND CMOS TS555 OUTPUT COMPATIBLE WITH TTL,CMOS AND LOGIC MOS N DIP8 (Plastic Package) D SO8 (Plastic Micropackage) DESCRIPTION The TS3V555 with its low consumption (90µA at VCC = 3V) is a single CMOS timer dedicated to 3.3V or battery supply (specified at 3V and 5V) offering also a high frequency (f(max) 2MHz at VCC = 3V and 2.7 MHz at VCC = 5V). Thus, either in monostable or astable mode, timing remains very accurate. Timing capacitors can also be minimized due to high input impedance (1012 Ω). ORDER CODES Part Number TS3V555I Temperature Range o -40, +125 C Package N D ● ● PIN CONNECTIONS (top view) October 1997 GND 1 8 VCC Trigger 2 7 Discharge Output 3 6 Threshold Reset 4 5 Control Voltage 1/8 TS3V555 BLOCK DIAGRAM VCC Reset 8 4 3V555 R R1 Control Voltage 3 Output Q + Threshold 6 R - 5 A S R + - Trigger 2 B R 7 Discharge 1 Ground FUNCTION TABLE RESET TRIGGER THRESHOLD OUTPUT Low x x Low High Low x High High High High Low High High Low Previous State ↔ ↔ ↔ LOW HIGH X Level Voltage ≤ Min voltage specified Level Voltage ≥ Max voltage specified Irrelevant ABSOLUTE MAXIMUM RATINGS Symbol Parameter Supply Voltage VCC Junction Temperature TJ Value +18 +150 Unit V o C THERMAL CHARACTERISTICS Symbol Toper Tstg Parameter Value Operating Temperature Range TS3V555I,AI -40 to +125 Storage Temperature Range -65 to +150 Unit o C o C OPERATING CONDITIONS Symbol VCC 2/8 Parameter Supply Voltage Value Unit +2.7 to +16 V TS3V555 ELECTRICAL CHARACTERISTICS VCC = +3V , Tamb = +25oC , Reset to VCC (unless otherwise specified) STATIC Symbol Parameter TS3V555I Min. Typ. Max. 90 230 230 2 2.2 2.3 Discharge Saturation Voltage (IDIS = 1mA) o Tamb = +25 C Tmin. ≤ Tamb ≤ Tmax. 0.05 - 0.2 0.25 Low Level Output Voltage (ISINK = 1mA) o Tamb = +25 C Tmin. ≤ Tamb ≤ Tmax. 0.1 0.3 0.35 Supply Current - (no load, High and Low States) o Tamb = +25 C Tmin. ≤ Tamb ≤ Tmax. ICC VCL Control Voltage o Tamb = +25 C Tmin. ≤ Tamb ≤ Tmax. VDIS VOL VOH VTRIG ITRIG ITH IRESET IDIS µA V 1.8 1.7 V V V High Level Output Voltage (ISOURCE = -0.3mA) o Tamb = +25 C Tmin. ≤ Tamb ≤ Tmax. 2.5 2.5 2.9 Trigger Voltage o Tamb = +25 C Tmin. ≤ Tamb ≤ Tmax. 0.9 0.8 1 V 1.1 1.2 Trigger Current 10 pA Threshold Current 10 pA Reset Voltage Tamb = +25°C Tmin. ≤ Tamb ≤ Tmax. VRESET Unit V 0.4 0.3 1.1 Reset Current 10 Discharge Pin Leakage Current 1 1.5 2.0 pA 100 nA DYNAMIC Symbol Parameter Timing Accuracy (Monostable) R = 10kΩ , C = 0.1µF - (note 1) fmax TS3V555I Min. Typ. Max. Unit % 1 %/V Timing Shift with supply voltage variations (Monostable) R = 10kΩ , C = 0.1µF, V CC = +3V +/-0.3V - (note 1) 0.5 Timing Shift with temperature - (note 1) Tmin. ≤ Tamb ≤ Tmax. 75 Maximum astable frequency - (note 2) R A = 470Ω , RB = 200Ω, C = 200pF 2 Astable frequency accuracy - (note 2) R A = RB = 1kΩ to 100kΩ, C = 0.1µF 5 ppm/°C MHz % %/V Timing Shift with supply voltage variations (Astable mode) - (note 2) R A = RB = 10kΩ, C = 0.1µF, VCC = +3 to+5V 0.5 tr Output Rise Time (CLOAD = 10pF) 25 ns tf Output Fall Time (CLOAD = 10pF) 20 ns Trigger Propagation Delay 100 ns Minimum Reset Pulse Width (VTRIG = +3V) 350 ns tPD tRPW Note : 1. See Figure 2 2. See Figure 4 3/8 TS3V555 ELECTRICAL CHARACTERISTICS VCC = +5V , Tamb = +25oC , Reset to VCC (unless otherwise specified) STATIC Symbol Parameter TS3V555I Min. Typ. Max. 110 250 250 3.3 3.8 3.9 Discharge Saturation Voltage (IDIS = 10mA) Tamb = +25°C Tmin. ≤ Tamb ≤ Tmax. 0.2 0.3 0.35 Low Level Output Voltage (ISINK = 8mA) Tamb = +25°C Tmin. ≤ Tamb ≤ Tmax. 0.3 0.6 0.8 Supply Current - (no load, High and Low States) Tamb = +25°C Tmin. ≤ Tamb ≤ Tmax. ICC VCL Control Voltage Tamb = +25°C Tmin. ≤ Tamb ≤ Tmax. VDIS VOL VOH VTRIG ITRIG ITH IRESET IDIS µA V 2.9 2.8 V V V High Level Output Voltage (ISOURCE = -2mA) Tamb = +25°C Tmin. ≤ Tamb ≤ Tmax. 4.4 4.4 4.6 Trigger Voltage Tamb = +25°C Tmin. ≤ Tamb ≤ Tmax. 1.36 1.26 1.67 V 1.96 2.06 Trigger Current 10 pA Threshold Current 10 pA Reset Voltage Tamb = +25°C Tmin. ≤ Tamb ≤ Tmax. VRESET Unit V 0.4 0.3 1.1 Reset Current 10 Discharge Pin Leakage Current 1 1.5 2.0 pA 100 nA DYNAMIC Symbol Parameter Timing Accuracy (Monostable) - (note1) R = 10kΩ , C = 0.1µF - (note 1) Timing Shift with supply voltage variations (Monostable) - (note1) R = 10kΩ , C = 0.1µF, V CC = +5V +/-1V fmax Min. Typ. Max. Unit % 2 %/V 0.38 Timing Shift with temperature - (note1) Tmin .≤ Tamb ≤ Tmax. 75 Maximum astable frequency - (note 2) R A = 470Ω , RB = 200Ω, C = 200pF 2.7 Astable frequency accuracy - (note 2) R A = RB = 1kΩ to 100kΩ, C = 0.1µF 3 ppm/°C MHz % %/V Timing Shift with supply voltage variations (Astable mode) - (note 2) R A = RB = 10kΩ, C = 0.1µF, VCC = +5V to+12V 0.1 tr Output Rise Time (CLOAD = 10pF) 25 ns tf Output Fall Time (CLOAD = 10pF) 20 ns Trigger Propagation Delay 100 ns Minimum Reset Pulse Width (VTRIG = +5V) 350 ns tPD tRPW Note : 4/8 TS3V555I 1. See Figure 2 2. See Figure 4 TS3V555 TYPICAL CHARACTERISTICS Figure 1 : Supply Current (each timer) versus supply voltage. SUPPLY CURRENT, I CC ( µA) 300 200 100 0 4 8 12 16 SUPPLY VOLTAGE, V CC (V) APPLICATION INFORMATION MONOSTABLE OPERATION In the monostable mode,the timer functions as a one-shot. Referring to figure 2 the external capacitor is initially held discharged by a transistor inside the timer. Figure 2 VCC Reset R 4 Trigger Out INPUT = 2.0V/div 7 TS3V555 6 C OUTPUT VOLTAGE = 5.0V/div 5 3 1 Figure 3 t = 0.1 ms / div 8 2 The circuit triggers on a negative-goinginput signal when the level reaches 1/3 VCC. Oncetriggered,the circuit remains in this state until the set time has elapsed,even if it is triggered again during this interval. The duration of the output HIGH state is given by t = 1.1 R x C. Notice that since the charge rate and the threshold level of the comparator are both directly proportional to supply voltage, the timing interval is independent of supply. Applying a negative pulse simultaneouslyto the Reset terminal (pin 4) and the Trigger terminal (pin 2) during the timing cycle discharges the external capacitor and causes the cycle to start over. The timing cycle now starts on the positive edge of the reset pulse. During the time the reset pulse is applied, the output is driven to its LOW state. When a negative trigger pulse is applied to pin 2, the flip-flop is set, releasing the short circuit across the external capacitor and driving the output HIGH. The voltage across the capacitor increases exponentially with the time constant τ = R x C. When the voltage across the capacitor equals 2/3 VCC, the comparator resets the flip-flop which then discharges the capacitor rapidly and drives the output to its LOW state. Figure 3 shows the actual waveforms generated in this mode of operation. When Reset is not used, it should be tied high to avoid any possible or false triggering. Control Voltage 0.01µF CAPACITOR VOLTAGE = 2.0V/div R = 9.1kΩ , C = 0.01µ F , RL = 1.0k Ω 5/8 TS3V555 ASTABLE OPERATION The charge time (output HIGH) is given by : When the circuit is connected as shown in figure 4 (pin 2 and 6 connected) it triggers itself and free runs as a multivibrator. The external capacitor charges through RA an d RB and discharges through RB only. Thus the duty cycle may be precisely set by the ratio of these two resistors. In the astable mode of operation, C charges and discharges between 1/3 VCC and 2/3 VCC. As in the triggered mode, the charge and discharge times and therefore frequency, are independent of the supply voltage. Figure 5 shows actual waveforms generated in this mode of operation. t1 = 0.693 (RA + RB) C Figure 4 Figure 5 and the discharge time (output LOW) by : t2 = 0.693 (RB) C Thus the total period T is given by : T = t1 + t2 = 0.693 (RA + 2RB) C The frequency of oscillation is then : f= 1 1.44 = T (RA + 2RB) C The duty cycle is given by : D = RB RA + 2RB t = 0.5 ms / div VCC OUTPUT VOLTAGE = 5.0V/div Reset RA 4 Out 8 3 7 TS3V555 Control Voltage 0.01 µ F 6/8 RB 6 5 1 2 C CAPACITOR VOLTAGE = 1.0V/div R = R = 4.8 kΩ, C = 0.1 µ F , R L = 1.0k Ω A B TS3V555 PM-DIP8.EPS PACKAGE MECHANICAL DATA 8 PINS - PLASTIC DIP A a1 B b b1 D E e e3 e4 F i L Z Min. Millimeters Typ. 3.32 0.51 1.15 0.356 0.204 Max. 1.65 0.55 0.304 10.92 9.75 7.95 Min. 0.020 0.045 0.014 0.008 Max. 0.065 0.022 0.012 0.430 0.384 0.313 2.54 7.62 7.62 3.18 Inches Typ. 0.131 0.100 0.300 0.300 6.6 5.08 3.81 1.52 0.125 0260 0.200 0.150 0.060 DIP8.TBL Dimensions 7/8 TS3V555 PM-SO8.EPS PACKAGE MECHANICAL DATA 8 PINS - PLASTIC MICROPACKAGE (SO) Dimensions Millimeters Typ. 0.1 0.65 0.35 0.19 0.25 Max. 1.75 0.25 1.65 0.85 0.48 0.25 0.5 Min. Inches Typ. 0.026 0.014 0.007 0.010 Max. 0.069 0.010 0.065 0.033 0.019 0.010 0.020 0.189 0.228 0.197 0.244 0.004 o 45 (typ.) 4.8 5.8 5.0 6.2 1.27 3.81 3.8 0.4 0.050 0.150 4.0 1.27 0.6 0.150 0.016 0.157 0.050 0.024 o 8 (max.) SO8.TBL A a1 a2 a3 b b1 C c1 D E e e3 F L M S Min. 1997 SGS-THOMSON Microelectronics – Printed in Italy – All Rights Reserved SGS-THOM SON Microelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Morocco The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. 8/8 ORDER CODE : Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics 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 SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without noti ce. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics.