NE556 - Contek Microelectronics Co., Ltd.

NE556 LINEAR INTEGRATED CIRCUIT

DUAL TIMER

DESCRIPTION

The Contek NE556 dual monolithic circuit is a highly

stable controller capable of producing accurate delays

or oscillation. The Contek NE556 is the dual of Contek

NE555; timing is provided an external resistor and

capacitor for each function. The two timers operate

independently of each other, sharing only Vcc and

GND. The circuits may be triggered and reset on falling

wave forms. The output structures may sink or source

200mA.

FEATURES

*High current driver capability(=200mA)

*Adjustable duty cycle

*Timing from mSec to Hours

*Temperature stability of 0.005%/ C

*TTL compatible

*Operates in both Astable and Monostable modes

DIP-14

SOP-14

APPLICATIONS

*Precision timing. *Pulse width modulation.

*Pulse generator, shaping. *Traffic light control.

*Time delay generator. *Touch tone encoder.

*Sequential timing. *Tone burst generator.

BLOCK DIAGRAM

Contek

CONTEK

Contek Microelectronics Co.,Ltd.

http://www.contek-ic.com E-mail:sales@contek-ic.com

NE556 LINEAR INTEGRATED CIRCUIT

ABSOLUTE MAXIMUM RATINGS(Ta=25 C )

PARAMETER SYMBOL VALUE UNIT

Supply Voltage Vcc 16 V

Power Dissipation Pd 600 mW

Lead Temperature(soldering 10

sec.)

Tlead 300 C

Operating Temperature Topr -40~85 C

Storage Temperature Tstg -65~150 C

ELECTRICAL CHARACTERISTICS

( Ta=25 C ,Vcc=5 to 15V, unless otherwise specified)

PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT

Supply voltage Vcc 4.5 16 V

Supply Current(two timers) Icc Vcc=5V,RL= 512mA

(low state), (Note 1) Vcc=15V,RL= 16 30 mA

Timing Error(monostable)

Initial Accuracy(Note 2) ACCUR RA=2KWto 100KW

C=0.1mF

T=1.1RC

0.75 %

Drift with Temperature Dt/DT50 ppm/ C

Drift with Supply Voltage Dt/DVcc 0.1 %/V

Timing Error(astable)

Initial Accuracy(Note 2) ACCUR RA=1KWto 100KW

C=0.1mF

Vcc=15V

2.25 %

Drift with Temperature Dt/DT150 ppm/ C

Drift with Supply Voltage Dt/DVcc 0.3 %/V

Control Voltage Vc Vcc=15V 9.0 10.0 11.0 V

Vcc=5V 2.6 3.33 4.0 V

Threshold Voltage VTH Vcc=15V 8.8 10.0 11.2 V

Vcc=5V 2.4 3.33 4.2 V

Threshold Current(Note 3) ITH 30 250 nA

Trigger Voltage Vtr Vcc=5V 1.1 1.6 2.2 V

Vcc=15V 4.5 5 5.6 V

Trigger Current Itr Vtr=0 0.01 2.0 mA

Reset Voltage(Note 4) Vrst 0.4 0.6 1.0 V

Reset Current Irst 0.03 0.6 mA

Low Output Voltage VOL Vcc=15V

Isink=10mA

Isink=50mA

Isink=100mA

Isink=200mA

0.1 0.25 V

0.4 0.75 V

2 3.2 V

2.5 V

Vcc=5V

Isink=5mA

Isink=8mA

0.15 0.25 V

0.25 0.35 V

High Output Voltage VOH Vcc=15V

Isource=200mA

Isource=100mA

CONTEK

Contek Microelectronics Co.,Ltd.

http://www.contek-ic.com E-mail:sales@contek-ic.com

NE556 LINEAR INTEGRATED CIRCUIT

PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT

12.5 V

12.75 13.3 V

Vcc=5V

Isource=100mA

2.75 3.3 V

Rise Time of Output tR100 300 nSec

Fall Time of Output tF100 300 nSec

Discharge Leakage Current ILKG 20 100 nA

Matching Parameter

Initial Accuracy(Note 5) ACCUR RA, RB=1KWto 100KW

C=0.1mF

Vcc=15V

12%

Drift with Temperature Dt/DT10 ppm/ C

Drift with Supply Voltage Dt/DVcc 0.2 0.5 %/V

Note 1: Supply current when output is high is typically 1mA less at Vcc 5V.

Note 2: Tested at Vcc=5V and Vcc=15V.

Note 3: This will determine the maximum value of RA+RB for 15V operation, The maximum total is R=20M W, and

for 5V operation the maximum total is R=6.6M W.

Note 4: As reset voltage lower, timing is inhibited and then the output goes low.

Note 5: Matching parameters refer to the difference between performance parameters of each timer section in the

monostable mode.

CONTEK

Contek Microelectronics Co.,Ltd.

http://www.contek-ic.com E-mail:sales@contek-ic.com