1/8

GREATER THAN 500kHz

HOURS

MONOSTABLE MODES

OR SINK 200mA

PER°C

DESCRIPTION

The NE556 dual monolithic timing circuit is a high-

ly stable controller capable of producing accurate

time delays or oscillation. In the time delay mode

of operation, the time is precisely controlled by

one external resistor and capacitor. For a stable

operation as an oscillator, the free running fre-

quency and the duty cycle are both accurately

controlled with two external resistors and one ca-

pacitor.

The circuit may be triggered and reset on falling

waveforms, and the output structure can source or

sink up to 200mA.

ORDER CODE

N = Dual in Line Package (DIP)

D = Small Outline Package (SO) - also available in Tape & Reel (DT)

PIN CONNECTIONS (top view)

Part Number

Temperature Range

Package

ND

NE556

0°C, 70°C

••

SA556

-40°C, 105°C

••

SE556

-55°C, 125°C

••

N

DIP14

(Plastic Package)

D

SO14

(Plastic Micropackage)

Trigger

Output

Control Voltage

4

8

5

6

7

9

10

11

12

13

14

Trigger

Threshold

Discharge

Reset

Output

Discharge

GND

1

2

3

Threshold

Control Voltage

Reset

CC

V

NE556

SA556 - SE556

GENERAL PURPOSE DUAL BIPOLAR TIMERS

June 2003