HD74HC21 datasheet(3/7 Pages) RENESAS

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HD74HC21

Rev.2.00, Oct 06, 2005 page 3 of 6

Electrical Characteristics

Ta = 25

°C

Ta = –40 to+85

°C

Item

Symbol VCC (V)

Min

Typ

Max

Min

Max

Unit

Test Conditions

2.0

1.5

—

1.5

—

4.5

3.15

—

3.15

—

VIH

6.0

4.2

—

4.2

—

2.0

—

0.5

—

0.5

4.5

—

1.35

—

1.35

Input voltage

VIL

6.0

—

1.8

—

1.8

2.0

1.9

2.0

—

1.9

—

4.5

4.4

4.5

—

4.4

—

6.0

5.9

6.0

—

5.9

—

IOH = –20

µA

4.5

4.18

—

4.13

—

IOH = –4 mA

VOH

6.0

5.68

—

5.63

—

Vin = VIH or VIL

IOH = –5.2 mA

2.0

—

0.0

0.1

—

0.1

4.5

—

0.0

0.1

—

0.1

6.0

—

0.0

0.1

—

0.1

IOL = 20

µA

4.5

—

0.26

—

0.33

IOL = 4 mA

Output voltage

VOL

6.0

—

0.26

—

0.33

Vin = VIH or VIL

IOL = 5.2 mA

Input current

Iin

6.0

—

±0.1

—

±1.0

µA Vin = VCC or GND

Quiescent supply

current

ICC

6.0

—

1.0

—

µA Vin = VCC or GND, Iout = 0 µA

Switching Characteristics (CL = 50 pF, Input tr = tf = 6 ns)

Ta = 25

°C

Ta = –40 to +85

°C

Item

Symbol VCC (V)

Min

Typ

Max

Min

Max

Unit

Test Conditions

2.0

—

100

—

125

4.5

—

tPLH

6.0

—

2.0

—

100

—

125

4.5

—

Propagation delay

time

tPHL

6.0

—

2.0

—

4.5

—

Output rise time

tTLH

6.0

—

2.0

—

4.5

—

Output fall time

tTHL

6.0

—

Input capacitance

Cin

—

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