TS556

TS556 LOW POWER DUAL CMOS TIMER s VERY LOW POWER CONSUMPTION : s s s s s s s 220 µA typ at VCC = 5V 180 µA typ at VCC = 3V HIGH MAXIMUM ASTABLE FREQUENCY 2.7MHz PIN-TO-PIN AND FUNCTIONALLY COMPATIBLE WITH BIPOLAR NE556 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 DIP14 (Plastic Package) DESCRIPTION The TS556 is a dual CMOS timer which offers very low consumption (Icc(TYP) TS556 = 220µA at VCC=+5V versus Icc(TYP) NE556 = 6mA) and high frequency ff(max.) TS556 = 2.7MHz versus f(max.) NE556 = 0.1 MHz) Thus, either in Monostable or Astable mode, timing remains very accurate. The TS556 provides reduced supply current spikes during output transitions, which enables the use of lower decoupling capacitors compared to those required by bipolar NE556. Timing capacitors can also be minimized due to high input impedance (1012Ω). ORDER CODES Package Part Number TS556C TS556I TS556M Temperature Range N 0°C, +70°C -40°C, +125°C -55°C, +125°C • • • D • • • D SO14 (Plastic Micropackage) PIN CONNECTIONS (top view) Discharge Threshold Control Voltage Reset Output Trigger GND 1 2 3 4 5 6 7 14 13 12 11 10 9 8 +VS Discharge Threshold Control Voltage Reset Output Trigger N = Dual in Line Package (DIP) D = Small Outline Package (SO) - also available in Tape & Reel (DT) February 2003 1/11 TS556 BLOCK DIAGRAM V CC 14 Reset 4 / 10 TS556 R 2 / 12 R1 + Threshold Control Voltage Q R 5/9 Output 3 / 11 A S R + Trigger 6/8 - B 1 / 13 R 7 Discharge 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 Supply Voltage Junction Temperature Storage Temperature Range Power dissipation o o Parameter Value +18 +150 -65 to +150 DIP14 SO14 1560 830 Unit V °C °C mW 1) 1. T j = 150°C, Tamb = 25 C with Rthja = 80 C/W for DIP14 package Rthja = 150oC/W for SO14 package OPERATING CONDITIONS Symbol VCC Toper Supply Voltage Operating Free Air Temperature Range TS556C TS556I TS556M Parameter Value +2 to +16 0 to +70 -40 to +125 -55 to +125 Unit V °C 2/11 V CC R1 Τ10 Τ12 Τ21 Τ20 Τ26 Τ27 Τ31 Τ30 Τ13 Τ11 50k Ω Τ1 Τ2 R2 SCHEMATIC DIAGRAM (1/2 TS556) 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 TS556 3/11 TS556 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. 130 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. 400 400 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 4/11 TS556 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. 180 2 0.05 1 0.1 2.9 1 10 10 1.1 10 1.5 2.0 1.1 1.2 Max. 460 460 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) 1) R = 10kΩ, C = 0.1µF Min. Typ. 1 1 0.5 75 2 5 2) Max. Unit VCC=+2V VCC=+3V % Timing Shift with Supply Voltage Variations (Monostable) 1) R = 10kΩ, C = 0.1µF,VCC = +3V ±0.3V Timing Shift with Temperature Tmin. ≤ Tamb ≤ Tmax fmax 1) %/V ppm/°C MHz % %/V ns ns ns ns Maximum Astable Frequency 2) RA = 470Ω, RB = 200Ω, C = 200pF Astable Frequency Accuracy 2) RA =RB = 1kΩ to 100kΩ, C = 0.1µF Timing Shift with Supply Voltage Variations (Astable mode) RA =RB = 10kΩ, C = 0.1µF, VCC = +3 to +5V 0.5 25 20 100 350 tR tF tPD tRPW 1. 2. 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 5/11 TS556 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. 220 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. 500 500 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. 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 = 1kΩ to 100kΩ, 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 6/11 TS556 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. 340 8 0.09 1 1.2 11 4 10 10 1.1 10 1.5 2.0 4.8 4.9 Max. 800 800 8.6 8.7 1.6 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 Timing Shift with Supply Voltage Variations (Monostable) R = 10kΩ, C = 0.1µF,VCC = +5V ±1V Timing Shift with Temperature Tmin. ≤ Tamb ≤ Tmax., VCC = +5V fmax Maximum Astable Frequency RA = 470Ω, RB = 200Ω, C = 200pF, VCC = +5V 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 = 5 to +12V 1. 2. see figure 2 see figure 4 Min. Typ. 4 0.38 75 2.7 3 0.1 Max. Unit % %/V ppm/°C MHz % %/V 2) 7/11 TS556 TYPICAL CHARACTERISTICS Figure 1 : Supply Current (each timer) versus Supply Voltage 300 SUPPLY CURRENT, I CC (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. 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 Figure 2 : V CC Reset R INPUT = 2.0V/div Trigger OUTPUT VOLTAGE = 5.0V/div 1/2 TS556 Out C Control Voltage 0.01µF CAPACITOR VOLTAGE = 2.0V/div R = 9.1kΩ , C = 0.01 µ F , R L = 1.0k Ω 8/11 TS556 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 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 Out 1/2 TS556 Control Voltage 0.01 µ F RB C CAPACITOR VOLTAGE = 1.0V/div R = R = 4.8 kΩ, C = 0.1 µ F , R L = 1.0k Ω A B 9/11 TS556 PACKAGE MECHANICAL DATA 14 PINS - PLASTIC DIP Millimeters Dimensions Min. a1 B b b1 D E e e3 F i L Z 0.51 1.39 0.5 0.25 20 8.5 2.54 15.24 7.1 5.1 3.3 1.27 2.54 0.050 Typ. Max. 1.65 Min. 0.020 0.055 Inches Typ. Max. 0.065 0.020 0.010 0.787 0.335 0.100 0.600 0.280 0.201 0.130 0.100 10/11 TS556 PACKAGE MECHANICAL DATA 14 PINS - PLASTIC MICROPACKAGE (SO) L C G c1 a2 b e3 D M e A s E 14 1 8 7 F Millimeters Dimensions Min. A a1 a2 b b1 C c1 D (1) E e e3 F (1) G L M S 0.1 0.35 0.19 0.5 45° (typ.) 8.55 5.8 1.27 7.62 3.8 4.6 0.5 4.0 5.3 1.27 0.68 8° (max.) 0.150 0.181 0.020 8.75 6.2 0.336 0.228 Typ. Max. 1.75 0.2 1.6 0.46 0.25 Min. 0.004 0.014 0.007 a1 b1 Inches Typ. Max. 0.069 0.008 0.063 0.018 0.010 0.020 0.344 0.244 0.050 0.300 0.157 0.208 0.050 0.027 Note : (1) D and F do not include mold flash or protrusions - Mold flash or protrusions shall not exceed 0.15mm (.066 inc) ONLY FOR DATA BOOK. 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 11/11