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TS556C中文资料

TS556C,I,M

LOW POWER DUAL CMOS TIMERS

October 1997

.VERY LOW POWER CONSUMPTION :.100μA typ at V CC =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)

Control Voltage 1234567

141312111098

Discharge Threshold Reset Output Trigger GND

Control Voltage +V Discharge Threshold Reset Output Trigger

S PIN CONNECTIONS (top view)

ORDER CODES

Part Number Temperature

Range Package N

TS556C 0o

C,+70o

C q q TS556I -40,+125o

C q q TS556M

-55,+125o C

Examples :TS556CD ,TS556IN

DESCRIPTION

The TS556is a dual CMOS timer which offersvery low consumption (Icc (TYP)TS556=200μA Icc (TYP)NE556=6mA)and high frequency

(f (max.)TS556=2.7MHz -f (max.)NE556=0.1MHz)Thus,either in Monostable or Astable mode,tim-ing remains very accurate.

The TS556provides 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?).

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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 X

￡

Irrelevant

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter

Value Unit V CC Supply Voltage +18V

T J

Junction Temperature

+150

THERMAL CHARACTERISTICS

Symbol Parameter

Value Unit

T OPER

Operating Temperature Range

TS556C TS556I TS556M 0to +70-40to +125-55to +125o

T STG Storage Temperature Range

-65to +150

Output

Dis charge

Ground

Tr igger

Control

Vol tage Thres hold V CC

R eset

4/10

5/9

2/12

3/11

6/8

1/13

TS556

BLOCK DIAGRAM

TS556C,I,M

2/11

R 1

50k ?

Τ1R 2

50k ?

R 3

50k ?

R 4

50k

R 5

50k

R 6

50k

Τ2Τ4

T h r e s h o l d

Τ5

Τ6Τ7

Τ14Τ8Τ9

Τ15Τ16Τ17

Τ18Τ19T r i g g e r

Τ24

Τ22Τ23

Τ28

Τ29

Τ32

Τ35

Τ33

D i s c h a r g e

O u t p u t

Τ10

Τ11Τ12Τ13Τ20Τ21

Τ26

Τ25

Τ27Τ30

Τ31Τ34

G N D R E S E T

C C

R 7C o n t r o l V o l t a g e

SCHEMATIC DIAGRAM (1/2TS556)

TS556C,I,M

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STATIC ELECTRICAL CHARACTERISTICS

V CC =+2V,T amb =+25o C,Reset to V CC (unless otherwise specified)

Symbol Parameter

TS556C-TS556I-TS556M Unit

Min.

Typ Max.I CC

Supply Current (no load,High and Low States)

T amb =+25o

T min .≤T amb ≤T max .130

400400μA

V CL

Control Voltage

T amb =+25o C

T min .≤T amb ≤T max .

1.21.1

1.3

1.41.5V

V dis

Discharge Saturation Voltage (I dis =1mA)

T amb =+25o C

T min .≤T amb ≤T max .0.05

0.20.25V

V OL

Low Level Output Voltage (I sink =1mA)

T amb =+25o

T min .≤T amb ≤T max .0.1

0.30.35

V OH

High Level Output Voltage (I source =-0.3mA)

T amb =+25o C

T min .≤T amb ≤T max . 1.51.5 1.9

V trig

Trigger Voltage

T amb =+25o

T min .≤T amb ≤T max .0.40.30.670.951.05

I trig Trigger Current 10pA I TH Threshold Current 10pA

V reset

Reset Voltage

T amb =+25o

T min .≤T amb ≤T max .0.40.3 1.1 1.52.0V

I reset Reset Current

10pA i dis

Discharge Pin Leakage Current

100

OPERATING CONDITIONS

Symbol Parameter

Value Unit V CC

Supply Voltage

+2to +16

TS556C,I,M

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STATIC ELECTRICAL CHARACTERISTICS(continued)

V CC=+5V,T amb=+25o C,Reset to V CC(unless otherwise specified)

Symbol Parameter TS556C-TS556I-TS556M

Unit Min.Typ Max.

I CC Supply Current(no load,High and Low States)

T amb=+25o C

T min.≤T amb≤T max.220500

500

μA

V CL Control Voltage

T amb=+25o C

T min.≤T amb≤T max.2.9

2.8

3.3 3.8

3.9

V dis Discharge Saturation Voltage(I dis=10mA) T amb=+25o C

T min.≤T amb≤T max.0.20.3

0.35

V OL Low Level Output Voltage(I sink=8mA)

T amb=+25o C

T min.≤T amb≤T max.0.30.6

0.8

V OH High Level Output Voltage(I source=-2mA) T amb=+25o C

T min.≤T amb≤T max.4.4

4.4

4.6

V trig Trigger Voltage

T amb=+25o C

T min.≤T amb≤T max.1.36

1.26

1.67 1.96

2.06

I trig Trigger Current10pA I TH Threshold Current10pA

V reset Reset Voltage

T amb=+25o C

T min.≤T amb≤T max.0.4

0.3

1.1 1.5

2.0

I reset Reset Current10pA

I dis Discharge Pin Leakage Current1100nA

TS556C,I,M

5/11

STATIC ELECTRICAL CHARACTERISTICS(continued)

V CC=+12V,T amb=+25o C,Reset to V CC(unless otherwise specified)

Symbol Parameter TS556C-TS556I-TS556M

Unit Min.Typ Max.

I CC Supply Current(no load,High and Low States)

T amb=+25o C

T min.≤T amb≤T max.340800

800

μA

V CL Control Voltage

T amb=+25o C

T min.≤T amb≤T max.7.4

7.3

88.6

8.7

V dis Discharge Saturation Voltage(I dis=80mA) T amb=+25o C

T min.≤T amb≤T max.0.09 1.6

2.0

V OL Low Level Output Voltage(I sink=50mA)

T amb=+25o C

T min.≤T amb≤T max.1.22

2.8

V OH High Level Output Voltage(I source=-10mA) T amb=+25o C

T min.≤T amb≤T max.10.5

10.5

V trig Trigger Voltage

T amb=+25o C

T min.≤T amb≤T max.3.2

3.1

4 4.8

4.9

I trig Trigger Current10pA I TH Threshold Current10pA

V reset Reset Voltage

T amb=+25o C

T min.≤T amb≤T max.0.4

0.3

1.1 1.5

2.0

I reset Reset Current10pA

I dis Discharge Pin Leakage Current1100nA TS556C,I,M

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DYNAMIC ELECTRICAL CHARACTERISTICS

T amb=+25o C,Reset to V CC(unless otherwise specified)

Symbol Parameter TS556C-TS556I-TS556M

Unit Min Typ Max

Timing Accuracy(Monostable)-(note1)

R=10k?,C=0.1μF

V CC=+2V

V CC=+5V

V CC=+12V 1

Timing Shift with supply voltage variations(Monostable)

R=10k?,C=0.1μF,V CC=+5V+/-1V0.38

%/V

Timing Shift with temperature

T min.≤T amb≤T max.,V CC=+5V75

ppm/°C

f max Maximum astable frequency

R A=470?,R B=200?,C=200pF,V CC=+5V 2.7

MHz Astable frequency accuracy-(note2)

R A=R B=1k?to100k?,C=0.1μF

V CC=+5V

V CC=+12V 3

Timing Shift with supply voltage variations(Astable mode)

R A=R B=1k?to100k?,C=0.1μF,V CC=5to+12V0.1

%/V t r Output Rise Time(V CC=+5V,C load=10pF)25ns

t f Output Fall Time(V CC=+5V,C load=10pF)20-ns t pd Trigger Propagation Delay(V CC=+5V)100ns t rpw Minimum Reset Pulse Width(V trig=+5V)350ns

Notes:1.See Figure2

2.See Figure4

TS556C,I,M

7/11

APPLICATION INFORMATION MONOSTABLE OPERATION

In the monostable mode,the timer functions as a one-shot.Referring to figure 2the external capaci-tor is initially held discharged by a transistor inside the timer.V CC

Reset

Trigger

Out

C Control Voltage

0.01F

μ1/2TS556

Figure 2

CC SUPPLY VOLTAGE,V (V)

C C S U P P L Y C U R R E N T ,I (A )

μ300

200

100

0481216

TYPICAL CHARACTERISTICS

Figure 1:Supply Current (each timer)versus

Supply Voltage

The circuit triggers on a negative-goinginput signal when the level reaches 1/3V CC .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 =1.1R x C.

Notice that since the charge rate and the threshold level of the comparator are both directly propor-tional to supply voltage,the timing interval is inde-pendent of supply.Applying a negative pulse simultaneously to the Reset terminal (pin 4or 10)and the Trigger terminal (pin 2or 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 driv-ing the output HIGH.The voltage across the ca-pacitor increases exponentially with the time constant τ=R x C.

When the voltage across the capacitor equals 2/3V CC ,the comparator resets the flip-flop which then discharges the capacitor rapidly and drives the output to its LOW state.

Figure 3shows the actual waveforms generatedin this mode of operation.

When Reset is not used,it should be tied high to avoid any possible or false triggering.CAPACITOR VOLTAGE =2.0V/div ?

?μt =0.1ms /div INPUT =2.0V/div

OUTPUT VOLTAGE =5.0V/div

R =9.1k ,C =0.01F ,R =1.0k L Figure 3

TS556C,I,M

8/11

ASTABLE OPERATION

When the circuit is connected as shown in figure 4it triggers itself and free runs as a multivibrator.The external capacitor charges through R A and R B and discharges through R B 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 1/3V CC and 2/3V CC .As in the triggered mode,the charge and discharge times and therefore frequency,are independent of the supply voltage.

Figure 5shows actual waveforms generated in this mode of operation.

The charge time (output HIGH)is given by :t1=0.693(R A +R B )C

and the discharge time (output LOW)by :t2=0.693(R B )C

Thus the total period T is given by :T =t1+t2=0.693(R A +2R B )C The frequency of oscillation is then :f =1T =

1.44(R A +2R B )C The duty cycle is given by :D =R B

R A +2R B

V CC

Reset

Out

R C

R A

Control Voltage 0.01F

μ1/2TS556

Figure 4

??μt =0.5ms /div

OUTPUT VOLTAGE =5.0V/div

CAPACITOR VOLTAGE =1.0V/div

L R =R =4.8k ,C =0.1F ,R =1.0k A B

Figure 5

TS556C,I,M

9/11

P M -D I P 14.E P S

PACKAGE MECHANICAL DATA 14PINS -PLASTIC DIP

Dimensions

Millimeters

Inches Min.Typ.

Max.Min.Typ.

Max.a10.510.020B 1.39

1.650.055

0.065

b 0.50.020b10.25

0.010

D 20

0.787

E 8.50.335e 2.540.100e315.24

0.600

F 7.10.280i 5.1

0.201

L 3.3

0.130

1.27

2.54

0.050

0.100

D I P 14.T B L

TS556C,I,M

10/11

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.

SGS-THOMSON Microelectronics GROUP OF COMPANIES

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The Netherlands -Singapore -Spain -Sweden -Switzerland -Taiwan -Thailand -United Kingdom -U.S.A.

O R D E R C O D E :

P M -S O 14.E P S

PACKAGE MECHANICAL DATA

14PINS -PLASTIC MICROPACKAGE (SO)

Dimensions

Millimeters

Inches Min.Typ.

Max.Min.Typ.

Max.A 1.750.069a10.10.20.0040.008a2 1.60.063b 0.350.460.0140.018b10.19

0.25

0.007

0.010

C 0.5

0.020

c145o

(typ.)

D 8.558.750.3360.334

E 5.8

6.2

0.228

0.244

e 1.270.050e37.62

0.300

F 3.8 4.00.1500.157

G 4.6 5.30.1810.208L 0.5

1.270.020

0.050M 0.68

0.027S

(max.)

S O 14.T B L

TS556C,I,M

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