MC74AC20 MC74ACT20

5-2

FACT DATA

RECOMMENDED OPERATING CONDITIONS

Symbol

Parameter

Min

Typ

Min

Unit

VCC

Supply Voltage

′AC

2.0

5.0

6.0

V

VCC

Supply Voltage

′ACT

4.5

5.0

5.5

V

VREG

DC Regulated Power Voltage (Ref. to GND)

0

VCC

V

tr, tf

Input Rise and Fall Time (Note 1)

′AC Devices except Schmitt Inputs

VCC @ 3.0 V

150

tr, tf

Input Rise and Fall Time (Note 1)

′AC Devices except Schmitt Inputs

VCC @ 4.5 V

40

ns/V

r, tf

′AC Devices except Schmitt Inputs

VCC @ 5.5 V

25

tr, tf

Input Rise and Fall Time (Note 2)

′ACT Devices except Schmitt Inputs

VCC @ 4.5 V

10

ns/V

tr, tf

Input Rise and Fall Time (Note 2)

′ACT Devices except Schmitt Inputs

VCC @ 5.5 V

8.0

ns/V

TJ

Junction Temperature (PDIP)

140

°C

TA

Operating Ambient Temperature Range

–40

25

85

°C

IOH

Output Current — HIGH

–24

mA

IOL

Output Current — LOW

24

mA

1. Vin from 30% to 70% VCC; see individual Data Sheets for devices that differ from the typical input rise and fall times.

2. Vin from 0.8 V to 2.0 V; see individual Data Sheets for devices that differ from the typical input rise and fall times.

DC CHARACTERISTICS

Symbol

Parameter

VCC

(V)

74AC

74AC

Unit

Conditions

Symbol

Parameter

VCC

(V)

TA = +25°C

TA =

–40

°C to +85°C

Unit

Conditions

Typ

Guaranteed Limits

VIH

Minimum High Level

Input Voltage

3.0

1.5

2.1

2.1

VOUT = 0.1 V

Input Voltage

4.5

2.25

3.15

3.15

V

or VCC – 0.1 V

5.5

2.75

3.85

3.85

VIL

Maximum Low Level

Input Voltage

3.0

1.5

0.9

0.9

VOUT = 0.1 V

Input Voltage

4.5

2.25

1.35

1.35

V

or VCC – 0.1 V

5.5

2.75

1.65

1.65

VOH

Minimum Low Level

Output Voltage

3.0

2.99

2.9

2.9

IOUT = – 50 µA

Output Voltage

4.5

4.49

4.4

4.4

V

5.5

5.49

5.4

5.4

V

*VIN = VIL or VIH

3.0

2.56

2.46

V

– 12 mA

4.5

3.86

3.76

V

IOH

– 24 mA

5.5

4.86

4.76

– 24 mA

VOL

Maximum Low Level

Output Voltage

3.0

0.002

0.1

0.1

IOUT = 50 µA

Output Voltage

4.5

0.001

0.1

0.1

V

5.5

0.001

0.1

0.1

V

*VIN = VIL or VIH

3.0

0.36

0.44

V

12 mA

4.5

0.36

0.44

V

IOL

24 mA

5.5

0.36

0.44

24 mA

IIN

Maximum Input

Leakage Current

5.5

±0.1

±1.0

µA

VI = VCC, GND

Leakage Current

5.5

±0.1

±1.0

µA

I = VCC, GND

IOLD

†Minimum Dynamic

Output Current

5.5

75

mA

VOLD = 1.65 V Max

IOHD

Output Current

5.5

–75

mA

VOHD = 3.85 V Min

ICC

Maximum Quiescent

Supply Current

5.5

4.0

40

µA

VIN = VCC or GND

Supply Current

5.5

4.0

40

µA

IN = VCC or GND

* All outputs loaded; thresholds on input associated with output under test.

† Maximum test duration 2.0 ms, one output loaded at a time.

Note: IIN and ICC @ 3.0 V are guaranteed to be less than or equal to the respective limit @ 5.5 V.