TS3V556I Fast Delivery |IC PHOENIX CO.,LIMITED

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TS3V556I
3V LOW POWER DUAL TIMERS
TS3V556DIP14
(Plastic Package)
SO14
.DEDICATED TO3.3V ORBATTERY SUPPLY
(Specifiedat 3V and 5V).VERY LOW POWER CONSUMPTION: A/timat VCC =3V.WIDE SINGLE SUPPLY RANGE:
+2.7Vto +16V.HIGH OUTPUT CURRENT CAPABILITY.SUPPLY CURRENT SPIKES REDUCED
DURING OUTPUT TRANSITIONS.HIGH INPUT IMPEDANCE:1012.PIN-TO-PIN AND FUNCTIONALLY COMPATI-
BLE WITH BIPOLAR NE556 AND CMOS
TS556.OUTPUT COMPATIBLE WITH TTL,CMOS
AND LOGIC MOS
DESCRIPTION
The TS3V556 withits low consumption (90μA/tim VCC= 3V)isa dual CMOS timer dedicatedto
3.3Vor batterysupply(specifiedat 3Vand5V offer-
ing alsoa high frequency (f(max) 2MHzat VCC =3V
and 2.7 MHzat VCC= 5V). Thus, eitherin mono-
stableor astable mode, timing remains very accu-
rate.
Timing capacitors can also be minimized dueto
high input impedance (1012 Ω).
ORDER CODES
Part Number Temperature
Range
Package
TS3V556I -40, +125oC ll LOW POWER DUAL TIMERS igger tput
Control Voltage4
Trigger reshold
Discharge
Reset
Output
DischargeD
Thre shold
Control Voltage
ResetV
PIN CONNECTIONS (top view)
TS3V556
FUNCTION TABLE
RESET TRIGGER THRESHOLD OUTPUT
Low x x Low
High Low x High
High High High Low
High High Low Previous State
LOW Level Voltage ≤ Min voltage specified
HIGH Level Voltage ≥ Max voltage specified Irrelevant
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
VCC Supply Voltage +18 V Junction Temperature +150 oC
THERMAL CHARACTERISTICS
Symbol Parameter Value Unit
Toper Operating TemperatureRange
TS3V556I,AI -40to +125C
Tstg Storage TemperatureRange -65to +150 oC
Output
Discharge
Ground
Trigger
Control
Voltage
ThresholdCC Reset1091211813
3V556
BLOCK DIAGRAM (1/2 TS3V556)
OPERATING CONDITIONS
Symbol Parameter Value Unit
VCC Supply Voltage +2.7to +16 V
TS3V556
ELECTRICAL CHARACTERISTICS
VCC= +3V, Tamb= +25oC, Resetto VCC (unless otherwise specified)
STATIC
Symbol Parameter TS3V556I UnitMin. Typ. Max.
ICC Supply Current- (no load, High and Low States, per
timer)
Tamb= +25oC
Tmin. Tamb Tmax. 230
VCL Control Voltage
Tamb= +25oC
Tmin. Tamb Tmax.
1.7 2.2
VDIS Discharge Saturation Voltage (IDIS= 1mA)Tamb= +25oC
Tmin. Tamb Tmax.
VOL Low Level Output Voltage (ISINK= 1mA)
Tamb= +25oC
Tmin. Tamb Tmax.
0.1 0.3
VOH High Level Output Voltage (ISOURCE= -0.3mA)Tamb= +25oC
Tmin. Tamb Tmax.
2.9 V
VTRIG Trigger Voltage
Tamb= +25oC
Tmin. Tamb Tmax.
0.8 1.1
ITRIG Trigger Current 10 pA
ITH Threshold Current 10 pA
VRESET Reset VoltageTamb= +25°C
Tmin. Tamb Tmax.
1.1 1.5
IRESET Reset Current 10 pA
IDIS Discharge Pin Leakage Current 1 100 nA
DYNAMIC
Symbol Parameter TS3V556I UnitMin. Typ. Max.
Timing Accuracy (Monostable)= 10kΩ,C= 0.1μF- (note1) 1 %
Timing Shift with supply voltage variations (Monostable)= 10kΩ,C= 0.1μF, VCC= +3V +/-0.3V- (note1) 0.5
%/V
Timing Shift with temperature- (note1)
Tmin.  Tamb Tmax.75
ppm/°
fmax Maximum astable frequency- (note2)= 470Ω ,RB= 200Ω,C= 200pF 2
MHz
Astable frequency accuracy- (note2) =RB =1kΩto 100kΩ,C= 0.1μF 5
Timing Shift with supply voltage variations (Astable mode)- (note =RB= 10kΩ,C= 0.1μF, VCC=+3 to+5V
%/V Output Rise Time (CLOAD= 10pF) 25 ns Output Fall Time (CLOAD= 10pF) 20 ns
tPD Trigger Propagation Delay 100 ns
tRPW Minimum Reset Pulse Width (VTRIG= +3V) 350 ns
Note: 1. See Figure2
TS3V556
ELECTRICAL CHARACTERISTICS
VCC= +5V, Tamb= +25oC, Resetto VCC (unless otherwise specified)
STATIC
Symbol Parameter TS3V556I UnitMin. Typ. Max.
ICC Supply Current- (no load, High and Low States, per
timer)
Tamb= +25°C
Tmin. Tamb Tmax.
110 250
VCL Control Voltage
Tamb= +25°C
Tmin. Tamb Tmax.
3.3 3.8
VDIS Discharge Saturation Voltage (IDIS= 10mA)
Tamb= +25°C
Tmin. Tamb Tmax.
0.2 0.3
VOL Low Level Output Voltage (ISINK= 8mA)Tamb= +25°C
Tmin. Tamb Tmax.
0.3 0.6
VOH High Level Output Voltage (ISOURCE= -2mA)
Tamb= +25°C
Tmin. Tamb Tmax.
4.44.4 4.6
VTRIG Trigger VoltageTamb= +25°C
Tmin. Tamb Tmax.
1.67 1.96
ITRIG Trigger Current 10 pA
ITH Threshold Current 10 pA
VRESET Reset Voltage
Tamb= +25°C
Tmin. Tamb Tmax.
1.1 1.5
IRESET Reset Current 10 pA
IDIS Discharge Pin Leakage Current 1 100 nA
DYNAMIC
Symbol Parameter TS3V556I UnitMin. Typ. Max.
Timing Accuracy (Monostable)- (note1)= 10kΩ,C= 0.1μF- (note1) 2 %
Timing Shift with supply voltage variations (Monostable)- (note1)= 10kΩ,C= 0.1μF, VCC= +5V +/-1V 0.38
%/V
Timing Shift with temperature- (note1)
Tmin. Tamb Tmax.75
ppm/°
fmax Maximum astable frequency- (note2)= 470Ω ,RB= 200Ω,C= 200pF 2.7
MHz
Astable frequency accuracy- (note2) =RB =1kΩto 100kΩ,C= 0.1μF 3
Timing Shift with supply voltage variations (Astable mode)- (note =RB= 10kΩ,C= 0.1μF, VCC= +5V to+12V
%/V Output Rise Time (CLOAD= 10pF) 25 ns Output Fall Time (CLOAD= 10pF) 20 ns
tPD TriggerPropagation Delay 100 ns
tRPW Minimum Reset Pulse Width (VTRIG= +5V) 350 ns
Note: 1. See Figure2 See Figure4
TS3V556
APPLICATION INFORMATION
MONOSTABLE OPERATION the monostable mode,the timer functionsasa
one-shot. Referringto figure2 the external capaci-
toris initially held dischargedbya transistor inside
the timer.CC
Reset
Trigger
Out
ControlVoltage
0.01Fμ
1/2
TS3V556
Figure2
CAPACITORVOLTAGE= 2.0V/divΩ μ= 0.1ms/div
INPUT= 2.0V/div
OUTPUT VOLTAGE= 5.0V/div =9.1k,C =0.01F,R =1.0kL
Figure3
TYPICAL CHARACTERISTICSSUPPLYVOLTAGE,V (V)
SUPPLY
CURRENT,
100 8 12 16
Figure1: Supply Current (each timer)
versus supply voltage.
The circuit triggersona negative-going input signal
whenthelevel reaches1/3VCC. Once triggered,the
circuit remainsin this state until the set time has
elapsed,evenifitis triggered again during thisin-
terval. The durationof the output HIGH stateis
givenbyt= 1.1RxC.
Notice that since the charge rate and the threshold
levelof the comparator are both directly propor-
tionalto supply voltage, the timing intervalis inde-
pendent of supply. Applyinga negative pulse
simultaneouslyto the Reset terminal (pin4or 10)
and the Trigger terminal (pin2or8) during the tim-
ing cycle discharges the external capacitor and
causes thecycleto start over. The timing cycle now
startson the positive edgeof the reset pulse. Dur-
ing the time the reset pulseis applied, the outputis
driventoits LOW state.
Whena negative triggerpulseis appliedto the trig-
ger terminal, the flip-flopis set, releasing the short
circuit across the external capacitor and driving the
output HIGH. The voltage across the capacitorin-
creases exponentiallywiththe time constantτ=Rx
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 out-
puttoits LOW state.
Figure3 shows the actual waveforms generatedin
this modeof operation.
When Resetis not used,it should be tied highto
avoid any possibleor false triggering.
TS3V556CC
Reset
Out
Control
Voltage
0.01Fμ
TS3V556
Figure4Ω μ=0.5ms/div
OUTPUT VOLTAGE= 5.0V/div
CAPACITORVOLTAGE= 1.0V/divR=R =4.8k,C=0.1F,R= 1.0kAB
Figure5
ASTABLE OPERATION
When the circuitis connectedas shownin
figure4,it triggers itself and free runs asa
multivibrator. The external capacitor charges
throughRAandRBand discharges throughRB only.
Thus the duty cycle maybe precisely setby thera-
tioof these two resistors. the astable modeof operation,C charges and
discharges between 1/3 VCCand 2/3 VCC.Asin the
triggered mode, the charge and discharge times
and therefore frequency, are independentof the
supply voltage.
Figure5 shows actual waveforms generatedin this
modeof operation.
The charge time (output HIGH)is givenby:= 0.693 (RA +RB)C
and the discharge time (output LOW)by:= 0.693 (RB)C
Thus the total periodTis givenby:=t1+t2= 0.693 (RA +2RB)C
The frequencyof oscillationis then: TR R)CB +
1144A
The duty cycleis givenby:D R= +2

Partno	Mfg	Dc	Qty	Available	Descript
TS3V556I	ST	N/a	105	avai	3V LOW POWER DUAL TIMERS