TS3V556 3V LOW POWER DUAL TIMERS . . . .. .. . DEDICATED TO 3.3V OR BATTERY SUPPLY (Specified at 3V and 5V) VERY LOW POWER CONSUMPTION : 90 A/tim 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 PIN-TO-PIN AND FUNCTIONALLY COMPATIBLE WITH BIPOLAR NE556 AND CMOS TS556 OUTPUT COMPATIBLE WITH TTL,CMOS AND LOGIC MOS N DIP14 (Plastic Package) D SO14 DESCRIPTION The TS3V556 with its low consumption (90µA/tim at VCC = 3V) is a dual 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 Temperature Range o TS3V556I -40, +125 C Package N D l l PIN CONNECTIONS (top view) 1 14 VC C T h r e s h o ld 2 13 D isc ha rge Co n t r o l Vo l t a g e 3 12 Th res ho ld Discha rge May 2000 Re se t 4 11 Co n t r o l Vo l t a g e Ou t p u t 5 10 Re s e t Tr ig g e r 6 9 Out put GND 7 8 Trigge r 1/8 TS3V556 BLOCK DIAGRAM (1/2 TS3V556) Reset VCC 3V556 4 / 10 14 R R1 2 / 12 Threshold Control Voltage + Q Output 5/9 R - A 3 / 11 S R + Trigger 6/8 - B R 1 / 13 Discharge 7 Ground FUNCTION TABLE RESET TRIGGER THRESHOLD OUTPUT Low x x Low High Low x High High High High Low High High Low Previous State Level Voltage ≤ Min voltage specified Level Voltage ≥ Max voltage specified Irrelevant LOW HIGH X ABSOLUTE MAXIMUM RATINGS Symbol VCC Parameter Supply Voltage TJ Junction Temperature Value +18 +150 Unit V o C THERMAL CHARACTERISTICS Symbol Toper Tstg Parameter Value Operating Temperature Range TS3V556I,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 TS3V556 ELECTRICAL CHARACTERISTICS VCC = +3V , Tamb = +25oC , Reset to VCC (unless otherwise specified) STATIC Symbol Parameter Min. TS3V556I Typ. Supply Current - (no load, High and Low States, per timer) Tamb = +25oC Tmin. Tamb Tmax. ICC Control Voltage Tamb = +25oC Tmin. Tamb Tmax. VCL VDIS VOH VTRIG ITRIG ITH Threshold Current Reset Voltage Tamb = +25°C Tmin. Tamb Tmax. VRESET IRESET IDIS 90 230 230 2 2.2 2.3 0.05 - 0.2 0.25 0.1 0.3 0.35 Unit µA V 1.8 1.7 Discharge Saturation Voltage (IDIS = 1mA) Tamb = +25oC Tmin. Tamb Tmax. Low Level Output Voltage (ISINK = 1mA) Tamb = +25oC Tmin. Tamb Tmax. High Level Output Voltage (ISOURCE = -0.3mA) Tamb = +25oC Tmin. Tamb Tmax. Trigger Voltage Tamb = +25oC Tmin. Tamb Tmax. Trigger Current VOL Max. V V V 2.5 2.5 2.9 0.9 0.8 1 V 0.4 0.3 1.1 1.2 10 pA 10 pA V 1.1 Reset Current Discharge Pin Leakage Current 1.5 2.0 10 1 100 pA nA DYNAMIC Symbol fmax tr tf tPD tRPW Note : Parameter Timing Accuracy (Monostable) R = 10kΩ , C = 0.1µF - (note 1) Timing Shift with supply voltage variations (Monostable) R = 10kΩ , C = 0.1µF, V CC = +3V +/-0.3V - (note 1) Timing Shift with temperature - (note 1) Tmin. Tamb Tmax. Maximum astable frequency - (note 2) RA = 470Ω , RB = 200Ω, C = 200pF Astable frequency accuracy - (note 2) RA = RB = 1kΩ to 100kΩ, C = 0.1µF Timing Shift with supply voltage variations (Astable mode) - (note 2) RA = RB = 10k Ω, C = 0.1µF, VCC = +3 to+5V Output Rise Time (CLOAD = 10pF) Output Fall Time (CLOAD = 10pF) Trigger Propagation Delay Minimum Reset Pulse Width (V TRIG = +3V) Min. TS3V556I Typ. Max. Unit % 1 %/V 0.5 75 ppm/° C MHz 2 % 5 %/V 0.5 25 20 ns ns 100 350 ns ns 1. See Figure 2 2. See Figure 4 3/8 TS3V556 ELECTRICAL CHARACTERISTICS VCC = +5V , Tamb = +25oC , Reset to VCC (unless otherwise specified) STATIC Symbol Parameter Supply Current - (no load, High and Low States, per timer) Tamb = +25°C Tmin. Tamb Tmax. Control Voltage Tamb = +25°C Tmin. Tamb Tmax. Discharge Saturation Voltage (IDIS = 10mA) Tamb = +25°C Tmin. Tamb Tmax. ICC VCL VDIS VOL Low Level Output Voltage (ISINK = 8mA) Tamb = +25°C Tmin. Tamb Tmax. High Level Output Voltage (ISOURCE = -2mA) Tamb = +25°C Tmin. Tamb Tmax. Trigger Voltage Tamb = +25°C Tmin. Tamb Tmax. VOH VTRIG ITRIG ITH VRESET Trigger Current Threshold Current Reset Voltage Tamb = +25°C Tmin. Tamb Tmax. Reset Current Discharge Pin Leakage Current IRESET IDIS Min. TS3V556I Typ. Max. 110 250 250 3.3 3.8 3.9 0.2 0.3 0.35 0.3 0.6 0.8 Unit µA V 2.9 2.8 V V V 4.4 4.4 4.6 1.36 1.26 1.67 V 1.96 2.06 10 10 0.4 0.3 pA pA V 1.1 1.5 2.0 10 1 100 pA nA DYNAMIC Symbol fmax tr tf tPD tRPW Note : 4/8 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 Timing Shift with temperature - (note1) Tmin . Tamb Tmax. Maximum astable frequency - (note 2) RA = 470Ω , RB = 200Ω, C = 200pF Astable frequency accuracy - (note 2) RA = RB = 1kΩ to 100kΩ, C = 0.1µF Timing Shift with supply voltage variations (Astable mode) - (note 2) RA = RB = 10kΩ, C = 0.1µF, VCC = +5V to+12V Output Rise Time (CLOAD = 10pF) Min. TS3V556I Typ. Max. Unit % 2 %/V 0.38 75 ppm/° C MHz 2.7 % 3 %/V 0.1 25 ns Output Fall Time (CLOAD = 10pF) Trigger Propagation Delay 20 100 ns ns Minimum Reset Pulse Width (V TRIG = +5V) 350 ns 1. See Figure 2 2. See Figure 4 TS3V556 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 VC C Reset R Figure 3 t = 0.1 ms / div Trigger 1/2 TS3V556 Out The circuit triggers on a negative-going input signal when the level reaches 1/3 V CC. 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. 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 simultaneously to the Reset terminal (pin 4 or 10) and the Trigger terminal (pin 2 or 8) 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 the trigger terminal, the flip-flop is set, releasing the short circuit across the external capacitor and driving the output HIGH. The voltage across the capacitor increases exponentiallywith 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. INPUT = 2.0V/div C Control Voltage 0.01µF OUTPUT VOLTAGE = 5.0V/div CAPACITOR VOLTAGE = 2.0V/div R = 9.1kΩ , C = 0.01 µ F , RL = 1.0k Ω 5/8 TS3V556 ASTABLE OPERATION When the circuit is connected as shown in figure 4 , it triggers itself and free runs as a multivibrator. The external capacitor charges throughR A and R B 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. 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 (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= 1 144 . = T (RA + 2RB ) C The duty cycle is given by : D = Figure 5 shows actual waveforms generated in this Figure 4 RB RA + 2R B Figure 5 t = 0.5 ms / div VCC OUTPUT VOLTAGE = 5.0V/div Reset RA Out TS3V556 Control Voltage 0.01 µ F 6/8 RB C CAPACITOR VOLTAGE = 1.0V/div R = R = 4.8 kΩ , C = 0.1 µ F , R L = 1.0k Ω A B TS3V556 PACKAGE MECHANICAL DATA 14 PINS - PLASTIC DIP Dimensions a1 B b b1 D E e e3 F i L Z Min. 0.51 1.39 Millimeters Typ. Max. 1.65 Min. 0.020 0.055 0.5 0.25 Inches Typ. 0.065 0.020 0.010 20 0.787 8.5 2.54 15.24 0.335 0.100 0.600 7.1 5.1 0.280 0.201 3.3 1.27 Max. 0.130 2.54 0.050 0.100 7/8 TS3V556 PACKAGE MECHANICAL DATA 14 PINS - PLASTIC MICROPACKAGE (SO) Dimensions A a1 a2 b b1 C c1 D E e e3 F G L M S Min. Millimeters Typ. 0.1 0.35 0.19 Max. 1.75 0.2 1.6 0.46 0.25 Min. Inches Typ. 0.004 0.014 0.007 0.5 Max. 0.069 0.008 0.063 0.018 0.010 0.020 o 45 (typ.) 8.55 5.8 8.75 6.2 0.336 0.228 1.27 7.62 3.8 4.6 0.5 0.334 0.244 0.050 0.300 4.0 5.3 1.27 0.68 0.150 0.181 0.020 0.157 0.208 0.050 0.027 o 8 (max.) nformation 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. 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