Philips Semiconductors Linear Products

Product specification

ICM7555

General purpose CMOS timer

337

August 31, 1994

853-1192 13721

DESCRIPTION

The ICM7555 is a CMOS timer providing significantly improved

performance over the standard NE/SE555 timer, while at the same

time being a direct replacement for those devices in most

applications. Improved parameters include low supply current, wide

operating supply voltage range, low THRESHOLD, TRIGGER, and

RESET currents, no crowbarring of the supply current during output

transitions, higher frequency performance and no requirement to

decouple CONTROL VOLTAGE for stable operation.

The ICM7555 is a stable controller capable of producing accurate

time delays or frequencies.

In the one-shot mode, the pulse width of each circuit is precisely

controlled by one external resistor and capacitor. For astable

operation as an oscillator, the free-running frequency and the duty

cycle are both accurately controlled by two external resistors and

one capacitor. Unlike the bipolar 555 device, the CONTROL

VOLTAGE terminal need not be decoupled with a capacitor. The

TRIGGER and RESET inputs are active low. The output inverter can

source or sink currents large enough to drive TTL loads or provide

minimal offsets to drive CMOS loads.

FEATURES

automotive temperatures

transition

bipolar 555 for longer time constants

PIN CONFIGURATION

THRESHOLD

D and N Packages

DISCHARGE

VDD

CONTROL VOLTAGE

1

2

3

4

5

6

7

8

GND

TRIGGER

OUTPUT

RESET

APPLICATIONS

ORDERING INFORMATION

DESCRIPTION

TEMPERATURE RANGE

ORDER CODE

DWG #

8-Pin Plastic Dual In-Line Package (DIP)

0 to +70

°C

ICM7555CN

0404B

8-Pin Plastic Small Outline (SO) Package

0 to +70

°C

ICM7555CD

0174C

8-Pin Plastic Dual In-Line Package (DIP)

-40 to +85

°C

ICM7555IN

0404B

8-Pin Plastic Small Outline (SO) Package

-40 to +85

°C

ICM7555ID

0174C