74HC5555 datasheet(13/23 Pages) NXP

13 / 23 page

September 1993

Philips Semiconductors

Product speciﬁcation

Programmable delay timer with oscillator

74HC/HCT5555

Notes

1. The RS input has CMOS input switching levels.

2. The value of additional quiescent supply current (

∆ICC) for a unit load of 1 is given in the family specifications. To

determine

∆ICC per input, multiply this value by the unit load coefficient shown in the following table.

UNIT LOAD COEFFICIENT

VOH

HIGH level

output

voltage RTC

output

3.98

−−

3.84

−

3.7

−

4.5

RS = GND;

OSC CON

=VCC

Io = −2.6 mA

3.98

−−

3.84

−

3.7

−

4.5

RS = VCC;

OSC CON

= GND;

untriggered

Io =

−0.65 mA

4.4

4.5

−

4.4

−

4.4

−

4.5

RS = VCC;

OSC CON

= VCC

Io = −20 µA

4.4

4.5

−

4.4

−

4.4

−

4.5

RS = VCC;

OSC CON

= GND;

untriggered

Io = −20 µA

VOH

HIGH level

output

voltage CTC

output

3.98

−−

3.84

−

3.7

−

4.5

RS = VIH;

OSC CON

= VIH

Io = −3.2 mA

VOL

LOW level

output

voltage RTC

output

−−

0.26

−

0.33

−

0.4

4.5

RS = VCC;

OSC CON

= VCC

Io = 2.6 mA

−

0.1

−

0.1

−

0.1

4.5

RS = VCC;

OSC CON

= VCC

Io = 20 µA

VOL

LOW level

output

voltage CTC

output

−−

0.26

−

0.33

−

0.4

4.5

RS = VIL;

OSC CON

= VIL;

untriggered

Io = 3.2 mA

INPUT

UNIT LOAD COEFFICIENT

0.35

0.69

0.50

RTR/RTR

0.35

OSC CON

1.20

S0 - S2

0.65

0.40

SYMBOL

PARAMETER

Tamb (°C)

UNIT

TEST CONDITION

+25

−40 to +85

−0to +125

VCC

(V)

OTHER

MIN TYP MAX

MIN

MAX

MIN

MAX

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