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| TS556C,I,M LOW POWER DUAL CMOS TIMERS . . . . . . . . . VERY LOW POWER CONSUMPTION : 100A typ at VCC = 5V HIGH MAXIMUM ASTABLE FREQUENCY 2.7MHz PIN-TO-PIN AND FUNCTIONALLY COMPATIBLE WITH BIPOLAR NE555 VOLTAGE RANGE : +2V to +18V HIGH OUTPUT CURRENT CAPABILITY SUPPLY CURRENT SPIKES REDUCED DURING OUTPUT TRANSITIONS HIGH INPUT IMPEDANCE : 1012 OUTPUT COMPATIBLE WITH TTL,CMOS AND LOGIC MOS N DIP14 (Plastic Package) D SO14 (Plastic Micropackage) ORDER CODES Part Number TS556C TS556I TS556M Temperature Range 0 C, +70 C -40, +125oC -55, +125 C o o o Package N q q q D q q q Examples : TS556CD , TS556IN PIN CONNECTIONS (top view) DESCRIPTION The TS556 is a dual CMOS timer which offers very low consumption (Icc(TYP) TS556 = 200A Icc(TYP) NE556 = 6mA) and high frequency (f(max.) TS556 = 2.7MHz - 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 (1012 ). October 1997 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 1/11 TS556C,I,M BLOCK DIAGRAM V CC 14 R eset 4 / 10 TS556 R 2 / 12 R1 + Thres hold Control Vol tage 3 / 11 R Q R 5 /9 Output - A S + Tr igger 6/8 - B 1 / 13 R 7 Dis charge Ground RESET Low High High High LOW HIGH X TRIGGER x Low High High THRESHOLD x x High Low OUTPUT Low High Low Previous State Level Voltage Min voltage specified Level Voltage Max voltage specified Irrelevant ABSOLUTE MAXIMUM RATINGS Symbol VCC TJ Parameter Supply Voltage Junction Temperature Value +18 +150 Unit V o C THERMAL CHARACTERISTICS Symbol TOPER Parameter Operating Temperature Range TS556C TS556I TS556M Storage Temperature Range Value 0 to +70 -40 to +125 -55 to +125 -65 to +150 o Unit o C TSTG C 2/11 V CC R1 50k 1 21 20 26 27 31 30 11 2 12 13 10 SCHEMATIC DIAGRAM (1/2 TS556) R2 50k R7 Threshold 34 Control Voltage 8 9 25 R3 4 Output Trigger 50k R4 50k 6 7 23 14 18 19 24 Discharge R5 5 50k 28 29 32 35 R6 17 15 16 22 33 50k GND RESET TS556C,I,M 3/11 TS556C,I,M OPERATING CONDITIONS Symbol VCC Supply Voltage Parameter Value +2 to +16 Unit V STATIC ELECTRICAL CHARACTERISTICS VCC = +2V, T amb = +25oC, Reset to VCC (unless otherwise specified) Symbol ICC Parameter Supply Current (no load, High and Low States) o Tamb = + 25 C Tmin. Tamb Tmax. Control Voltage Tamb = + 25oC Tmin. Tamb Tmax. Discharge Saturation Voltage (Idis = 1mA) Tamb = + 25oC Tmin. Tamb Tmax. Low Level Output Voltage (Isink = 1mA) o Tamb = + 25 C Tmin. Tamb Tmax. High Level Output Voltage (Isource = -0.3mA) Tamb = + 25oC Tmin. Tamb Tmax. Trigger Voltage o Tamb = + 25 C Tmin. Tamb Tmax. Trigger Current Threshold Current Reset Voltage o Tamb = + 25 C Tmin. Tamb Tmax. Reset Current Discharge Pin Leakage Current 0.4 0.3 1.5 1.5 0.4 0.3 1.2 1.1 TS556C-TS556I-TS556M Min. Typ 130 Max. 400 400 1.4 1.5 V 0.05 0.2 0.25 V 0.1 0.3 0.35 V 1.9 V 0.67 10 10 1.1 10 1 100 1.5 2.0 pA nA 0.95 1.05 pA pA V Unit A V VCL 1.3 Vdis VOL VOH Vtrig Itrig ITH Vreset Ireset idis 4/11 TS556C,I,M STATIC ELECTRICAL CHARACTERISTICS (continued) VCC = +5V, T amb = +25oC, Reset to VCC (unless otherwise specified) Symbol ICC Parameter Supply Current (no load, High and Low States) o Tamb = + 25 C Tmin. Tamb Tmax. Control Voltage Tamb = + 25oC Tmin. Tamb Tmax. Discharge Saturation Voltage (Idis = 10mA) o Tamb = + 25 C Tmin. Tamb Tmax. Low Level Output Voltage (Isink = 8mA) o Tamb = + 25 C Tmin. Tamb Tmax. High Level Output Voltage (Isource = -2mA) o Tamb = + 25 C Tmin. Tamb Tmax. Trigger Voltage o Tamb = + 25 C Tmin. Tamb Tmax. Trigger Current Threshold Current Reset Voltage Tamb = + 25oC Tmin. Tamb Tmax. Reset Current Discharge Pin Leakage Current 0.4 0.3 4.4 4.4 1.36 1.26 2.9 2.8 TS556C-TS556I-TS556M Min. Typ 220 Max. 500 500 3.8 3.9 V 0.2 0.3 0.35 V 0.3 0.6 0.8 V 4.6 V 1.67 10 10 1.1 10 1 100 1.5 2.0 pA nA 1.96 2.06 pA pA V Unit A V VCL 3.3 Vdis VOL VOH Vtrig Itrig ITH Vreset Ireset Idis 5/11 TS556C,I,M STATIC ELECTRICAL CHARACTERISTICS (continued) VCC = +12V, Tamb = +25oC, Reset to VCC (unless otherwise specified) Symbol ICC Parameter Supply Current (no load, High and Low States) o Tamb = + 25 C Tmin. Tamb Tmax. Control Voltage Tamb = + 25oC Tmin. Tamb Tmax. Discharge Saturation Voltage (Idis = 80mA) o Tamb = + 25 C Tmin. Tamb Tmax. Low Level Output Voltage (Isink = 50mA) o Tamb = + 25 C Tmin. Tamb Tmax. High Level Output Voltage (Isource = -10mA) o Tamb = + 25 C Tmin. Tamb Tmax. Trigger Voltage o Tamb = + 25 C Tmin. Tamb Tmax. Trigger Current Threshold Current Reset Voltage Tamb = + 25oC Tmin. Tamb Tmax. Reset Current Discharge Pin Leakage Current 0.4 0.3 10.5 10.5 3.2 3.1 7.4 7.3 TS556C-TS556I-TS556M Min. Typ 340 Max. 800 800 8.6 8.7 V 0.09 1.6 2.0 V 1.2 2 2.8 V 11 V 4 10 10 1.1 10 1 100 1.5 2.0 pA nA 4.8 4.9 pA pA V Unit A V VCL 8 Vdis VOL VOH Vtrig Itrig ITH Vreset Ireset Idis 6/11 TS556C,I,M DYNAMIC ELECTRICAL CHARACTERISTICS Tamb = +25oC, Reset to VCC (unless otherwise specified) Symbol Parameter Timing Accuracy (Monostable) - (note 1) R = 10k , C = 0.1F VCC = + 2V VCC = + 5V VCC = +12V Timing Shift with supply voltage variations (Monostable) R = 10k , C = 0.1F, V CC = + 5V +/-1V Timing Shift with temperature Tmin. Tamb Tmax., VCC = + 5V fmax Maximum astable frequency R A = 470 , RB = 200, C = 200pF , VCC = + 5V Astable frequency accuracy - (note 2) R A = RB = 1k to 100k, C = 0.1F VCC = + 5V VCC = + 12V Timing Shift with supply voltage variations (Astable mode) R A = RB = 1k to 100k, C = 0.1F, V CC = 5 to+ 12V tr tf tpd trpw Output Rise Time (VCC = + 5V , Cload = 10pF) Output Fall Time (VCC = + 5V , Cloa d = 10pF) Trigger Propagation Delay (VCC = + 5V) Minimum Reset Pulse Width (Vtrig = + 5V) 1 2 4 %/V 0.38 ppm/C 75 MHz 2.7 % 3 3 %/V 0.1 25 20 100 350 ns ns ns ns TS556C-TS556I-TS556M Min Typ Max Unit % Notes : 1. See Figure 2 2. See Figure 4 7/11 TS556C,I,M TYPICAL CHARACTERISTICS Figure 1 : Supply Current (each timer) versus Supply Voltage 300 SUPPLY CURRENT, I CC (A) 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 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 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 exponentially with the time constant = 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 VCC Reset R t = 0.1 ms / div INPUT = 2.0V/div Trigger 1/2 TS556 Out C OUTPUT VOLTAGE = 5.0V/div Control Voltage 0.01F CAPACITOR VOLTAGE = 2.0V/div R = 9.1k , C = 0.01 F , RL = 1.0k 8/11 TS556C,I,M 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 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 5 shows actual waveforms generated in this Figure 4 VCC Reset RA 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 : 1 1.44 f= = T (RA + 2RB)C The duty cycle is given by : D = Figure 5 t = 0.5 ms / div OUTPUT VOLTAGE = 5.0V/div RB RA + 2RB Out 1/2 TS556 Control Voltage 0.01 F RB C CAPACITOR VOLTAGE = 1.0V/div R = R = 4.8 k, C = 0.1 F , R L = 1.0k A B 9/11 TS556C,I,M 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 Inches Typ. Max. 0.065 0.5 0.25 20 8.5 2.54 15.24 7.1 5.1 3.3 1.27 2.54 0.050 0.020 0.010 0.787 0.335 0.100 0.600 0.280 0.201 0.130 0.100 DIP14.TBL 10/11 PM-DIP14.EPS TS556C,I,M 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. 0.1 0.35 0.19 Millimeters Typ. Max. 1.75 0.2 1.6 0.46 0.25 45 (typ.) o Min. 0.004 0.014 0.007 Inches Typ. Max. 0.069 0.008 0.063 0.018 0.010 0.5 8.55 5.8 1.27 7.62 3.8 4.6 0.5 4.0 5.3 1.27 0.68 8 (max.) o 0.020 8.75 6.2 0.336 0.228 0.050 0.300 0.150 0.181 0.020 0.157 0.208 0.050 0.027 0.334 0.244 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. Specification mentioned in this publication are subject to change without notice. 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. ORDER CODE : (c) 1997 SGS-THOMSON Microelectronics - Printed in Italy - All Rights Reserved SGS-THOM SON Microelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. 11/11 SO14.TBL PM-SO14.EPS |
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