ICM7555CN datasheet(5/22 Pages) NXP

Part #	ICM7555CN

Description	General purpose CMOS timer

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Manufacturer	NXP [NXP Semiconductors]

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ICM7555_2

Product data sheet

Rev. 02 — 3 August 2009

5 of 22

NXP Semiconductors

ICM7555

General purpose CMOS timer

[1]

The supply current value is essentially independent of the TRIGGER, THRESHOLD and RESET voltages.

[2]

Astable timing is calculated using the following equation:

The components are deﬁned in Figure 15.

[3]

RA, RB = 1 kΩ to 100 kΩ; C = 0.1 µF; 5 V < VDD <15V

[4]

Parameter is not 100 % tested.

II

input current

TRIGGER

VDD =Vtrig =Vmax

-50

-

pA

VDD =Vtrig = 5 V

-

10

-

pA

VDD =Vtrig =Vmin

-1

-pA

THRESHOLD

VDD =Vth =Vmax

-50

-

pA

VDD =Vth =5V

-

10

-

pA

VDD =Vth =Vmin

-1

-pA

RESET

VDD =Vrst =Vmax

-

100

-

pA

VDD =Vrst =5V

-

20

-

pA

VDD =Vrst =Vmin

-2

-pA

VOL

LOW-level output voltage

VDD =Vmax; Isink = 3.2 mA

-

0.1

0.4

V

VDD =5V; Isink = 3.2 mA

-

0.2

0.4

V

VOH

HIGH-level output voltage

Isource = −1.0 mA

VDD =Vmax

15.25

15.7

-

V

VDD =5Vmax

4.0

4.5

-

V

Vo

output voltage

DISCHARGE:

VDD =5V; IDIS =10mA

-

0.2

0.4

V

tr(o)

output rise time[4]

RL =10MΩ; CL = 10 pF;

VDD =5V

-45

75

ns

tf(o)

output fall time[4]

-20

75

ns

fosc

oscillator frequency

astable mode

-

500

kHz

Table 5.

Characteristics …continued

Tamb =25 °C unless otherwise speciﬁed.

Sym

bol

Parameter

Conditions

Min

Typ

Max

Unit

f

1.38

R

A

2R

B

+

()C

---------------------------------

=

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