Datasheet TS3V556IN, TS3V556ID, TS3V556 Datasheet (SGS Thomson Microelectronics)

1/8



TS3V556

N

DIP14

(Plastic Package)

D

SO14

.DEDICATEDTO3.3VORBATTERY SUPPLY

(Specified at 3V and 5V)

.VERY LOW POWERCONSUMPTION :

90 A/tim at VCC=3V

.WIDE SINGLE SUPPLY RANGE :

+2.7V to +16V

.HIGH OUTPUT CURRENTCAPABILITY

.SUPPLY CURRENT SPIKES REDUCED

DURING OUTPUT TRANSITIONS

.HIGH INPUT IMPEDANCE: 10

12

.PIN-TO-PIN AND FUNCTIONALLY COMPATI-

BLE WITH BIPOLAR NE556 AND CMOS
TS556

.OUTPUT COMPATIBLE WITH TTL,CMOS

AND LOGIC MOS

DESCRIPTION

The TS3V556 with its low consumption (90µA/tim
at VCC= 3V) is a dual CMOS timer dedicated to

3.3Vor batterysupply(specified at 3Vand5Voffer­ing also a highfrequency (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 (1012Ω).

ORDER CODES

Part Number

Temperature

Range

Package

ND

TS3V556I -40, +125

o

C ll

3V LOW POWER DUAL TIMERS

Trigger

Output

Control Voltage

4

8

5

6

7

9

10

11

12

13

14

Trigger

Thresho ld

Discharge

Re s e t

Output

Discharge

GND

1

2

3

Thre shold

Control Voltage

Rese t

CC

V

PIN CONNECTIONS (top view)

May 2000

TS3V556

2/8

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

X

Irrelevant

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

CC

Supply Voltage +18 V

T

J

Junction Temperature +150

o

C

THERMAL CHARACTERISTICS

Symbol Parameter Value Unit

T

oper

Operating TemperatureRange

TS3V556I,AI -40 to +125

o

C

T

stg

Storage Temperature Range -65 to +150

o

C

Output

Discharge

Ground

Trigger

Control

Voltage

Threshold

V

CC

Reset

R

R

R

B

A

R1

R

S

Q

+

-

+

-

4/10

5/9

14

2/12

3/11

6/8

7

1/13

3V556

BLOCK DIAGRAM (1/2 TS3V556)

OPERATING CONDITIONS

Symbol Parameter Value Unit

V

CC

Supply Voltage +2.7 to +16 V

TS3V556

3/8

ELECTRICAL CHARACTERISTICS

VCC= +3V , T

amb

= +25oC , Reset to VCC(unless otherwise specified)

STATIC

Symbol Parameter

TS3V556I

Unit

Min. Typ. Max.

I

CC

Supply Current - (no load, High and Low States, per
timer)

T

amb

= +25oC

T

min.

 T

amb Tmax

.

90 230

230

µA

V

CL

Control Voltage

T

amb

= +25oC

T

min.

 T

amb Tmax

.

1.8

1.7

2 2.2

2.3

V

V

DIS

Discharge Saturation Voltage (I

DIS

= 1mA)

T

amb

= +25oC

T

min.

 T

amb Tmax

.

0.05

-

0.2

0.25

V

V

OL

Low Level Output Voltage (I

SINK

= 1mA)

T

amb

= +25oC

T

min.

 T

amb Tmax

.

0.1 0.3

0.35

V

V

OH

High Level Output Voltage (I

SOURCE

= -0.3mA)

T

amb

= +25oC

T

min.

 T

amb Tmax

.

2.5

2.5

2.9

V

V

TRIG

Trigger Voltage

T

amb

= +25oC

T

min.

 T

amb Tmax

.

0.9

0.8

1 1.1

1.2

V

I

TRIG

Trigger Current 10 pA

I

TH

Threshold Current 10 pA

V

RESET

Reset Voltage

T

amb

= +25°C

T

min

.  T

amb Tmax.

0.4

0.3

1.1 1.5

2.0

V

I

RESET

Reset Current 10 pA

I

DIS

Discharge Pin Leakage Current 1 100 nA

DYNAMIC

Symbol Parameter

TS3V556I

Unit

Min. Typ. Max.

Timing Accuracy (Monostable)

R = 10kΩ , C = 0.1µF - (note 1)

1

%

Timing Shift with supply voltage variations (Monostable)

R = 10kΩ , C = 0.1µF, V

CC

= +3V +/-0.3V - (note 1)

0.5

%/V

Timing Shift with temperature - (note 1)

T

min. Tamb Tmax

.75

ppm/°

C

fmax Maximum astable frequency - (note 2)

R

A

= 470Ω ,RB= 200Ω, C = 200pF

2

MHz

Astable frequency accuracy - (note 2)

R

A=RB

=1kΩto 100kΩ,C=0.1µF

5

%

Timing Shift with supply voltage variations (Astable mode) - (note

2)
R

A=RB

= 10kΩ, C = 0.1µF, VCC= +3 to+5V

0.5

%/V

t

r

Output Rise Time(C

LOAD

= 10pF) 25 ns

t

f

Output Fall Time (C

LOAD

= 10pF) 20 ns

t

PD

Trigger Propagation Delay 100 ns

t

RPW

Minimum Reset Pulse Width (V

TRIG

= +3V) 350 ns

Note : 1. See Figure 2

2. See Figure 4

TS3V556

4/8

ELECTRICAL CHARACTERISTICS

VCC= +5V , T

amb

= +25oC , Reset to VCC(unless otherwise specified)

STATIC

Symbol Parameter

TS3V556I

Unit

Min. Typ. Max.

I

CC

Supply Current - (no load, High and Low States, per
timer)

T

amb

= +25°C

T

min

.  T

amb Tmax

.

110 250

250

µA

V

CL

Control Voltage

T

amb

= +25°C

T

min

.  T

amb Tmax

.

2.9

2.8

3.3 3.8

3.9

V

V

DIS

Discharge Saturation Voltage (I

DIS

= 10mA)

T

amb

= +25°C

T

min

.  T

amb Tmax

.

0.2 0.3

0.35

V

V

OL

Low Level Output Voltage (I

SINK

= 8mA)

T

amb

= +25°C

T

min

.  T

amb Tmax

.

0.3 0.6

0.8

V

V

OH

High Level Output Voltage (I

SOURCE

= -2mA)

T

amb

= +25°C

T

min

.  T

amb Tmax

.

4.4

4.4

4.6

V

V

TRIG

Trigger Voltage

T

amb

= +25°C

T

min

.  T

amb Tmax

.

1.36

1.26

1.67 1.96

2.06

V

I

TRIG

Trigger Current 10 pA

I

TH

Threshold Current 10 pA

V

RESET

Reset Voltage

T

amb

= +25°C

T

min

.  T

amb Tmax

.

0.4

0.3

1.1 1.5

2.0

V

I

RESET

Reset Current 10 pA

I

DIS

Discharge Pin Leakage Current 1 100 nA

DYNAMIC

Symbol Parameter

TS3V556I

Unit

Min. Typ. Max.

Timing Accuracy (Monostable) - (note1)

R = 10kΩ , C = 0.1µF - (note 1)

2

%

Timing Shift with supply voltage variations (Monostable)- (note1)

R = 10kΩ , C = 0.1µF, V

CC

= +5V +/-1V

0.38

%/V

Timing Shift with temperature - (note1)

T

min .Tamb Tmax

.75

ppm/°

C

fmax Maximum astable frequency - (note 2)

R

A

= 470Ω ,RB= 200Ω, C = 200pF

2.7

MHz

Astable frequency accuracy - (note 2)

R

A=RB

=1kΩto 100kΩ,C=0.1µF

3

%

Timing Shift with supply voltage variations (Astable mode) - (note

2)
R

A=RB

= 10kΩ, C = 0.1µF, VCC= +5V to+12V

0.1

%/V

t

r

Output Rise Time (C

LOAD

= 10pF) 25 ns

t

f

Output Fall Time (C

LOAD

= 10pF) 20 ns

t

PD

Trigger Propagation Delay 100 ns

t

RPW

Minimum Reset Pulse Width (V

TRIG

= +5V) 350 ns

Note : 1. See Figure 2

2. See Figure 4

TS3V556

5/8

APPLICATION INFORMATION

MONOSTABLEOPERATION
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.

V

CC

Reset

Trigger

Out

R

C

Control Voltage

0.01 F

µ

1/2

TS3V556

Figure 2

CAPACITORVOLTAGE = 2.0V/div

Ω

Ω

µ

t = 0.1ms / div

INPUT= 2.0V/div

OUTPUTVOLTAGE = 5.0V/div

R = 9.1k , C = 0.01 F , R = 1.0k

L

Figure 3

TYPICAL CHARACTERISTICS

CC

SUPPLYVOLTAGE,V (V)

CC

SUPPLY CURRENT, I ( A)

µ

300

200

100

0481216

Figure 1 : Supply Current (each timer)

versus supply voltage.

The circuittriggerson a negative-going inputsignal
whenthelevel reaches1/3VCC. 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 theTriggerterminal (pin 2 or 8) during the tim­ing cycle discharges the external capacitor and
causes thecycletostartover.The timingcyclenow
starts on the positive edge of the reset pulse. Dur­ing the timethe reset pulseis applied, the outputis
driven to its LOW state.

When a negative triggerpulseisapplied to the trig­ger terminal, the flip-flop is set, releasing the short
circuit across theexternal capacitorand drivingthe
output HIGH. The voltage across the capacitor in­creasesexponentiallywiththetime constantτ=Rx
C.

When the voltage across the capacitor equals 2/3
VCC, the comparator resets the flip-flop which then
dischargesthecapacitorrapidlyand drivesthe out­put to its LOW state.

Figure 3 shows the actual waveformsgenerated in
this mode of operation.

When Reset is not used, it should be tied high to
avoid any possible or false triggering.

TS3V556

6/8

V

CC

Reset

Out

R

C

R

A

B

Control

Voltage

0.01 F

µ

TS3V556

Figure 4

ΩΩ

µ

t = 0.5 ms / div

OUTPUT VOLTAGE = 5.0V/div

CAPACITOR VOLTAGE= 1.0V/div

L

R = R = 4.8 k , C =0.1 F , R = 1.0k

AB

Figure 5

ASTABLE OPERATION
When the circuit is connected as shown in

figure 4 , it triggers itself and free runs as a
multivibrator. The exter nal c apac itor charges
throughRAandRBanddischargesthroughRBonly.
Thus the duty cyclemay be precisely set by the ra­tio of these two resistors.

In the astable mode of operation, C charges and
dischargesbetween 1/3VCCand 2/3VCC.As inthe
triggered mode, the charge and discharge times
and therefore frequency, are independent of the
supply voltage.

Figure5showsactualwaveformsgeneratedinthis

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

TR R)C

B

==

+

1144

2

.

(

A

The duty cycle is given by : D

R

RR

=

+

B

AB

2

TS3V556

7/8

PACKAGE MECHANICAL DATA

14 PINS - PLASTIC DIP

Dimensions

Millimeters Inches

Min. Typ. Max. Min. Typ. Max.

a1 0.51 0.020

B 1.39 1.65 0.055 0.065

b 0.5 0.020

b1 0.25 0.010

D 20 0.787
E 8.5 0.335

e 2.54 0.100

e3 15.24 0.600

F 7.1 0.280

i 5.1 0.201

L 3.3 0.130

Z 1.27 2.54 0.050 0.100

TS3V556

8/8

nformation furnished is believedto beaccurate and reliable. However, STMicroelectronicsassumes noresponsibility forthe conse­quences ofuse of suchinformation nor forany infringementof patents or other rights ofthird parties whichmay result from its use.
No license is grantedby implicationor otherwise underany patentor patent rights of STMicroelectronics. Specifications mentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously sup­plied. STMicroelectronicsproducts are not authorizedfor use ascritical components in lifesupport devices orsystems without ex­press written approval of STMicroelectronics.

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PACKAGE MECHANICAL DATA

14 PINS - PLASTIC MICROPACKAGE (SO)

Dimensions

Millimeters Inches

Min. Typ. Max. Min. Typ. Max.

A 1.75 0.069
a1 0.1 0.2 0.004 0.008
a2 1.6 0.063

b 0.35 0.46 0.014 0.018

b1 0.19 0.25 0.007 0.010

C 0.5 0.020

c1 45

o

(typ.)
D 8.55 8.75 0.336 0.334
E 5.8 6.2 0.228 0.244

e 1.27 0.050

e3 7.62 0.300

F 3.8 4.0 0.150 0.157
G 4.6 5.3 0.181 0.208

L 0.5 1.27 0.020 0.050

M 0.68 0.027

S8

o

(max.)