STMicroelectronics TS556 Technical data

TS556

LOW POWER DUAL CMOS TIMER

■ VERY LOW POWER CONSUMPTION :

220 µA typ at V 180 µA typ at VCC = 3V

CC

= 5V

■ 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

■ SUPPL Y CURRENT SPIKES REDUCED

DURING OUTPUT TRANSITIONS

■ HIGH INPUT IMPEDANCE : 10

12

Ω

■ OUTPUT COMPATIBLE WITH TTL,CMOS

AND LOGIC MOS

DESCRIPTION

The TS556 is a dual CMOS timer which offers very low consumption (I V

=+5V versus I

CC

frequency f

cc(TYP)

TS556 = 2.7MHz versus f

f(max.)

NE556 = 0.1 MHz) Thus, either in Monostable or Astable mode, tim-

ing remains very accurate. The TS556 provides reduced supply current

spikes during output transitions, which enables the use of low er decoupling capacitors compa red to those required by bipolar NE556.

Timing capacitors can a lso be minimized due t o high input impedance (10

ORDER CODES

Part Number Temperature Range

TS556C 0°C, +70°C TS556I -40°C, +125°C TS556M -55°C, +125°C

TS556 = 220µA at

cc(TYP)

NE556 = 6mA) and high

(max.

12

Ω).

Package

ND

••

DIP14

(Plastic Package)

(Plastic Micropacka ge)

)

PIN CONNECTIONS (top view)

Discharge Threshold

Control

Voltage

Reset

Output

Trigger

GND

1 2 3 4 5 6 7

N

D

SO14

14 13 12 11 10

9 8

+V

S

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

Threshold

Control

Voltage

Trigger

2 / 12

3 / 11

6 / 8

V

CC

14

R

7

Ground

+

-

+

-

Reset

4 / 10

A

B

FUNCTION TABLE

RESET TRIGGER THRESHOLD OUTPUT

Low High High High

xxLow

Low x High High High Low High Low Previous State

LOW <-----> Level Voltage ≤ Min voltage specificed HIGH <-----> Level Voltage ≥ Max voltage specificed x <-----> Irrelevant

R1

R

S

TS556

Q

5 / 9

1 / 13

Output

Discharge

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

CC

T

j

T

stg

P

D

1. Tj = 150°C, T

Supply Voltage +18 V Junction Temperature +150 °C

Storage Temperature Range -65 to +150 °C Power dissipation

= 25oC with Rthja = 80oC/W for DIP14 package

amb

Rthja = 150

1)

o

C/W for SO14 package

DIP14 SO14

1560

830

OPERATING CONDITIONS

Symbol Parameter Value Unit

V

T

CC

oper

Supply Voltage +2 to +16 V Operating Free Air Temperature Range

TS556C TS556I TS556M

0 to +70

-40 to +125

-55 to +125

mW

°C

2/11

SCHEMATIC DIAGRAM (1/2 TS556)

Τ34

TS556

Output

Τ35

Τ33

Discharge

Τ31

Τ27 Τ30

Τ26

Τ25

Τ21

CC

V

Τ20

Τ12 Τ13

Trigger

Τ32

Τ29

Τ28

Τ24

Τ23

Τ18 Τ19

Τ22

Τ17

Τ16

Τ15

RESET

GND

R1

Τ14

Τ11

Τ10

Τ2

Τ1

Ω

50k

R2

R7

Ω

50k

Τ9 Τ8

Threshold

Τ4

R4

Ω

50k

Ω

R3

ontrol Voltage

50k

R5

Τ6

Τ5

Τ7

Ω

50k

R6

Ω

50k

3/11

TS556

STATIC ELECTRICAL CHARACTERISTICS

= +2V, T

V

CC

Symbol Parameter Min. Typ. Max. Unit

I

CC

V

CL

V

DIS

I

DIS

V

OL

V

OH

V

TRIG

I

TRIG

I

TH

V

RESET

I

RESET

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

amb

Supply Current (no load, High and Low States)

T

min.

≤ T

amb

≤ T

max.

Control Voltage Level

T

≤ T

min.

Discharge Saturation Voltage (I

T

min.

≤ T

amb

≤ T

max.

= 1mA)

dis

1.2

1.1

130 400

400

1.3 1.4

1.5

0.05 0.2

0.25

Discharge Pin Leakage Current 1 100 nA Low Level Output Voltage (I

T

min.

≤ T

amb

≤ T

max.

High Level Output Voltage (I

T

≤ T

amb

≤ T

max.

min.

Trigger Voltage

T

≤ T

amb

≤ T

max.

min.

sink

source

= 1mA)

= -0.3mA)

1.5

0.4

0.3

0.1 0.3

0.35

1.9

0.67 0.95

1.05 Trigger Current 10 pA Threshold Current 10 pA

Reset Voltage

T

≤ T

min.

amb

≤ T

max.

0.4

0.3

1.1 1.5

2.0

Reset Current 10 pA

µA

V

4/11