TS555I

TS555 LOW POWER SINGLE CMOS TIMER s VERY LOW POWER CONSUMPTION : s s s s s s s 110 µA typ at VCC = 5V 90 µA typ at VCC = 3V HIGH MAXIMUM ASTABLE FREQUENCY 2.7MHz PIN-TO-PIN AND FUNCTIONALLY COMPATIBLE WITH BIPOLAR NE555 WIDE VOLTAGE RANGE : +2V to +16V HIGH OUTPUT CURRENT CAPABILITY SUPPLY CURRENT SPIKES REDUCED DURING OUTPUT TRANSITIONS HIGH INPUT IMPEDANCE : 1012Ω OUTPUT COMPATIBLE WITH TTL,CMOS AND LOGIC MOS N DIP8 (Plastic Package) DESCRIPTION The TS555 is a single CMOS timer which offers very low consumption (Icc(TYP) TS555 = 110µA at VCC=+5V versus Icc(TYP) NE555 = 3mA) and high frequency ff(max.) TS555 = 2.7MHz versus f(max.) NE555 = 0.1 MHz) Thus, either in Monostable or Astable mode, timing remains very accurate. The TS555 provides reduced supply current spikes during output transitions, which enables the use of lower decoupling capacitors compared to those required by bipolar NE555. Timing capacitors can also be minimized due to high input impedance (1012Ω). ORDER CODES Package Part Number TS555C TS555I TS555M Temperature Range N 0°C, +70°C -40°C, +125°C -55°C, +125°C • • • D • • • P • • • D SO8 (Plastic Micropackage) P TSSOP8 (Thin Shrink Small Outline Package) PIN CONNECTIONS (top view) GND Trigger Output Reset 1 2 3 4 8 7 6 5 VCC Discharge Threshold Control Voltage N = Dual in Line Package (DIP) D = Small Outline Package (SO) - also available in Tape & Reel (DT) P = T hin Shrink Small Outline Package (TSSOP) - only available in Tape & Reel (PT) February 2003 1/12 TS555 BLOCK DIAGRAM V CC 8 Reset 4 TS555 R R1 Threshold 6 Control 5 Voltage R + + Q R A S 3 Output - Trigger 2 R - B 7 Discharge 1 Ground FUNCTION TABLE RESET Low High High High TRIGGER x Low High High THRESHOLD x x High Low OUTPUT Low High Low Previous State LOW Level Voltage ≤ Min voltage specificed HIGH Level Voltage ≥ Max voltage specificed x Irrelevant ABSOLUTE MAXIMUM RATINGS Symbol VCC Tj Tstg PD 1. T j = 150°C, T amb = 25oC with Rthja = 100oC/W for DIP8 package Rthja = 175oC/W for SO8 package Rthja = 200oC/W for TSSOP8 package Parameter Supply Voltage Junction Temperature Storage Temperature Range Power dissipation1) DIP8 SO8 TSSOP8 Value +18 +150 -65 to +150 1250 715 625 Unit V °C °C mW OPERATING CONDITIONS Symbol VCC Toper Supply Voltage Operating Free Air Temperature Range TS555C TS555I TS555M Parameter Value +2 to +16 0 to +70 -40 to +125 -55 to +125 Unit V °C 2/12 V CC R1 Τ10 Τ12 Τ21 Τ20 Τ26 Τ27 Τ31 Τ30 Τ13 Τ11 SCHEMATIC DIAGRAM 50k Ω Τ1 Τ2 R2 50k Ω R7 Τ25 Τ34 Control Voltage Τ8 Τ9 Threshold R3 Τ4 Output Trigger Τ14 Τ18 Τ23 Τ19 Τ7 Τ24 Τ28 Τ29 Τ32 Discharge Τ35 50k Ω R4 50k Ω R5 Τ5 Τ6 50k Ω R6 Τ15 Τ16 Τ17 Τ22 Τ33 50k Ω GND RESET TS555 3/12 TS555 STATIC ELECTRICAL CHARACTERISTICS VCC = +2V, Tamb = +25°C, Reset to V CC (unless otherwise specified) Symbol ICC VCL VDIS IDIS VOL VOH VTRIG ITRIG ITH VRESET IRESET Parameter Supply Current (no load, High and Low States) Tmin. ≤ Tamb ≤ Tmax. Control Voltage Level Tmin. ≤ Tamb ≤ Tmax. Discharge Saturation Voltage (Idis = 1mA) Tmin. ≤ Tamb ≤ Tmax. Discharge Pin Leakage Current Low Level Output Voltage (Isink = 1mA) Tmin. ≤ Tamb ≤ Tmax. High Level Output Voltage (Isource = -0.3mA) Tmin. ≤ Tamb ≤ Tmax. Trigger Voltage Tmin. ≤ Tamb ≤ Tmax. Trigger Current Threshold Current Reset Voltage Tmin. ≤ Tamb ≤ Tmax. Reset Current 0.4 0.3 1.5 1.5 0.4 0.3 1.2 1.1 Min. Typ. 65 1.3 0.05 1 0.1 1.9 0.67 10 10 1.1 10 1.5 2.0 0.95 1.05 Max. 200 200 1.4 1.5 0.2 0.25 100 0.3 0.35 Unit µA V V nA V V V pA pA V pA 4/12 TS555 ELECTRICAL CHARACTERISTICS VCC = +3V, Tamb = +25°C, Reset to VCC (unless otherwise specified) Symbol ICC VCL VDIS IDIS VOL VOH VTRIG ITRIG ITH VRESET IRESET Parameter Supply Current (no load, High and Low States) Tmin. ≤ Tamb ≤ Tmax. Control Voltage Level Tmin. ≤ Tamb ≤ Tmax. Discharge Saturation Voltage (Idis = 1mA) Tmin. ≤ Tamb ≤ Tmax. Discharge Pin Leakage Current Low Level Output Voltage (Isink = 1mA) Tmin. ≤ Tamb ≤ Tmax. High Level Output Voltage (Isource = -0.3mA) Tmin. ≤ Tamb ≤ Tmax. Trigger Voltage Tmin. ≤ Tamb ≤ Tmax. Trigger Current Threshold Current Reset Voltage Tmin. ≤ Tamb ≤ Tmax. Reset Current 0.4 0.3 2.5 2.5 0.9 0.8 1.8 1.7 Min. Typ. 90 2 0.05 1 0.1 2.9 1 10 10 1.1 10 1.5 2.0 1.1 1.2 Max. 230 230 2.2 2.3 0.2 0.25 100 0.3 0.35 Unit µA V V nA V V V pA pA V pA DYNAMIC ELECTRICAL CHARACTERISTICS VCC = +3V, Tamb = +25°C, Reset to VCC (unless otherwise specified) Symbol Parameter Timing Accuracy (Monostable) R = 10kΩ, C = 0.1µF 1) Min. Typ. 1 1 0.5 75 2 5 Max. Unit VCC=+2V VCC=+3V % Timing Shift with Supply Voltage Variations (Monostable) R = 10kΩ, C = 0.1µF,VCC = +3V ±0.3V 1) Timing Shift with Temperature 1) Tmin. ≤ Tamb ≤ Tmax.5 fmax Maximum Astable Frequency 2) RA = 470Ω, RB = 200Ω, C = 200pF Astable Frequency Accuracy RA =RB = 1kΩ to 100kΩ, C = 0.1µF Timing Shift with Supply Voltage Variations (Astable mode) RA =RB = 1kΩ to 100kΩ, C = 0.1µF, VCC = +3 to +5V tR tF tPD tRPW 1. 2. %/V ppm/°C MHz % %/V ns ns ns ns 2) 2) 0.5 25 20 100 350 Output Rise Time (Cload = 10pF) Output Fall Time (Cload = 10pF) Trigger Propagation Delay Minimum Reset Pulse Width (Vtrig = +3V) see figure 2 see figure 4 5/12 TS555 STATIC ELECTRICAL CHARACTERISTICS VCC = +5V, Tamb = +25°C, Reset to VCC (unless otherwise specified) Symbol ICC VCL VDIS IDIS VOL VOH VTRIG ITRIG ITH VRESET IRESET Parameter Supply Current (no load, High and Low States) Tmin. ≤ Tamb ≤ Tmax. Control Voltage Level Tmin. ≤ Tamb ≤ Tmax. Discharge Saturation Voltage (Idis = 10mA) Tmin. ≤ Tamb ≤ Tmax. Discharge Pin Leakage Current Low Level Output Voltage (Isink = 8mA) Tmin. ≤ Tamb ≤ Tmax. High Level Output Voltage (Isource = -2mA) Tmin. ≤ Tamb ≤ Tmax. Trigger Voltage Tmin. ≤ Tamb ≤ Tmax. Trigger Current Threshold Current Reset Voltage Tmin. ≤ Tamb ≤ Tmax. Reset Current 0.4 0.3 4.4 4.4 1.36 1.26 2.9 2.8 Min. Typ. 110 3.3 0.2 1 0.3 4.6 1.67 10 10 1.1 10 1.5 2.0 1.96 2.06 Max. 250 250 3.8 3.9 0.3 0.35 100 0.6 0.8 Unit µA V V nA V V V pA pA V pA DYNAMIC ELECTRICAL CHARACTERISTICS VCC = +5V, Tamb = +25°C, Reset to VCC (unless otherwise specified) Symbol Parameter Timing Accuracy (Monostable) 1) R = 10kΩ, C = 0.1µF Timing Shift with Supply Voltage Variations (Monostable) 1) R = 10kΩ, C = 0.1µF,VCC = +5V ±1V Timing Shift with Temperature 1) Tmin. ≤ Tamb ≤ Tmax.5 fmax Maximum Astable Frequency RA = 470Ω, RB = 200Ω, C = 200pF Astable Frequency Accuracy RA =RB = 1kΩ to 100kΩ, C = 0.1µF Timing Shift with Supply Voltage Variations (Astable mode) 2) RA =RB = 10kΩ, C = 0.1µF, VCC = +5 to +12V tR tF tPD tRPW 1. 2. Min. Typ. 2 0.38 75 2.7 3 0.1 25 20 100 350 Max. Unit % %/V ppm/°C MHz % %/V ns 2) 2) Output Rise Time (Cload = 10pF) Output Fall Time (Cload = 10pF) Trigger Propagation Delay Minimum Reset Pulse Width (Vtrig = +5V) - ns ns ns see figure 2 see figure 4 6/12 TS555 STATIC ELECTRICAL CHARACTERISTICS VCC = +12V, Tamb = +25°C, Reset to V CC (unless otherwise specified) Symbol ICC VCL VDIS IDIS VOL VOH VTRIG ITRIG ITH VRESET IRESET Parameter Supply Current (no load, High and Low States) Tmin. ≤ Tamb ≤ Tmax. Control Voltage Level Tmin. ≤ Tamb ≤ Tmax. Discharge Saturation Voltage (Idis = 80mA) Tmin. ≤ Tamb ≤ Tmax. Discharge Pin Leakage Current Low Level Output Voltage (Isink = 50mA) Tmin. ≤ Tamb ≤ Tmax. High Level Output Voltage (Isource = -10mA) Tmin. ≤ Tamb ≤ Tmax. Trigger Voltage Tmin. ≤ Tamb ≤ Tmax. Trigger Current Threshold Current Reset Voltage Tmin. ≤ Tamb ≤ Tmax. Reset Current 0.4 0.3 10.5 10.5 3.2 3.1 7.4 7.3 Min. Typ. 170 8 0.09 1 1.2 11 4 10 10 1.1 10 1.5 2.0 4.8 4.9 Max. 400 400 8.6 8.7 1.5 2.0 100 2 2.8 Unit µA V V nA V V V pA pA V pA DYNAMIC ELECTRICAL CHARACTERISTICS VCC = +12V, Tamb = +25°C, Reset to V CC (unless otherwise specified) Symbol Parameter Timing Accuracy (Monostable) 1) R = 10kΩ, C = 0.1µF VCC = +12V Timing Shift with Supply Voltage Variations (Monostable) R = 10kΩ, C = 0.1µF,VCC = +5V ±1V Timing Shift with Temperature Tmin. ≤ Tamb ≤ Tmax., VCC = +5 fmax Maximum Astable Frequency RA = 470Ω, RB = 200Ω, C = 200pF, VCC = +5V Astable Frequency Accuracy 2) RA =RB = 1kΩ to 100kΩ, C = 0.1µF, VCC = +12V Timing Shift with Supply Voltage Variations (Astable mode) RA =RB = 1kΩ to 100kΩ, C = 0.1µF, VCC = 5 to +12V 1. 2. see figure 2 see figure 4 Min. Typ. 4 Max. Unit % %/V ppm/°C MHz % %/V 1) 0.38 75 2.7 3 0.1 2) 7/12 TS555 TYPICAL CHARACTERISTICS Figure 1 : Supply Current (each timer) versus Supply Voltage 300 SUPPLY CURRENT, ICC (µA) 200 100 0 4 8 12 16 SUPPLY VOLTAGE, V CC (V) APPLICATION INFORMATION MONOSTABLE OPERATION In the monostable mode,the timer operates like a one-shot generator. Referring to figure 2, the external capacitor is initially held discharged by a transistor inside the timer. Figure 2 : V CC Reset R 4 Trigger 2 8 7 The circuit triggers on a negative-going input signal when the level reaches 1/3 VCC. Once triggered, 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. It can be noticed that since the charge rate and the threshold level of the comparator are both directly proportional to the supply voltage, the timing interval is independent of the supply. Applying a negative pulse simultaneously to 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. While the reset pulse is applied, the output is driven to the 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. Figure 3 : t = 0.1 ms / div INPUT = 2.0V/div OUTPUT VOLTAGE = 5.0V/div TS555 Out 3 1 6 C 5 Control Voltage 0.01µF CAPACITOR VOLTAGE = 2.0V/div R = 9.1kΩ , C = 0.01 µ F , R L = 1.0k Ω 8/12 TS555 ASTABLE OPERATION 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 and 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 4: V CC Reset RA 4 Out 3 8 7 Figure 5 shows actual waveforms generated in this mode of operation. The charge time (output HIGH) is given by : t1 = 0.693 (RA + RB) C and the discharge time (output LOW) by : t2 = 0.693 x RB x C Thus the total period T is given by : T = t1 + t2 = 0.693 (RA + 2R B) C The frequency of oscillation is then : 1 1.44 f = -- = ------------------------------------T ( RA + 2 R B ) C The duty cycle is given by : RB D = --------------------------R A + 2 RB Figure 5: t = 0.5 ms / div OUTPUT VOLTAGE = 5.0V/div TS555 Control Voltage 0.01 µF 5 1 2 6 RB C CAPACITOR VOLTAGE = 1.0V/div R = R = 4.8 kΩ , C = 0.1 µ F , R L = 1.0k Ω A B 9/12 TS555 PACKAGE MECHANICAL DATA 8 PINS - PLASTIC DIP Millimeters Dimensions Min. A a1 B b b1 D E e e3 e4 F i L Z 0.51 1.15 0.356 0.204 7.95 2.54 7.62 7.62 6.6 5.08 3.81 1.52 Typ. 3.32 1.65 0.55 0.304 10.92 9.75 0.020 0.045 0.014 0.008 0.313 Max. Min. Inches Typ. 0.131 0.065 0.022 0.012 0.430 0.384 0.100 0.300 0.300 0260 0.200 0.150 0.060 Max. 3.18 0.125 10/12 TS555 PACKAGE MECHANICAL DATA 8 PINS - PLASTIC MICROPACKAGE (SO) L c1 a2 A C a3 b1 s e3 E D M 8 5 1 4 Millimeters Dimensions Min. A a1 a2 a3 b b1 C c1 D E e e3 F L M S 0.1 0.65 0.35 0.19 0.25 4.8 5.8 1.27 3.81 3.8 0.4 4.0 1.27 0.6 8° (max.) 0.150 0.016 Typ. Max. 1.75 0.25 1.65 0.85 0.48 0.25 0.5 45° (typ.) 5.0 6.2 0.189 0.228 Min. 0.004 0.026 0.014 0.007 0.010 F a1 b Inches Typ. Max. 0.069 0.010 0.065 0.033 0.019 0.010 0.020 0.197 0.244 0.050 0.150 0.157 0.050 0.024 11/12 TS555 PACKAGE MECHANICAL DATA 8 PINS - THIN SHRINK SMALL OUTLINE PACKAGE k c 0.25mm .010 inch GAGE PLANE L1 L L L1 E1 SEATING PLANE A A2 A1 5 D b 8 8 C E 4 e 5 PIN 1 IDENTIFICATION Millimeters Dimensions Min. A A1 A2 b c D E E1 e k l L L1 0.05 0.80 0.19 0.09 2.90 4.30 0° 0.50 0.45 Typ. Max. 1.20 0.15 1.05 0.30 0.20 3.10 4.50 8° 0.75 0.75 Min. 0.01 0.031 0.007 0.003 0.114 0.169 0° 0.09 0.018 1 4 1 Inches Typ. Max. 0.05 0.006 0.041 0.15 0.012 0.122 0.177 8° 0.030 0.030 1.00 0.039 3.00 6.40 4.40 0.65 0.60 0.600 1.000 0.118 0.252 0.173 0.025 0.0236 0.024 0.039 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 © 2003 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom © http://www.st.com 12/12