VOH

VOL

Output

VCC

0 V

Input

tf

(1)

tr

(1)

90%

10%

90%

10%

tr

(1)

90%

10%

tf

(1)

90%

10%

CL

(1)

From Output

Under Test

Test

Point

VI ± Input Voltage (V)

0

0.5

1

1.5

2

2.5

3

3.5

0

0.02

0.04

0.06

0.08

0.1

0.12

0.14

0.16

0.18

0.2

VCC = 2 V

VCC = 2.5 V

VCC = 3.3 V

VI ± Input Voltage (V)

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

5.5

6

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

0.45

0.5

0.55

0.6

0.65

VCC = 4.5 V

VCC = 5 V

VCC = 6 V

Output Sink Current (mA)

0

2.5

5

7.5

10

12.5

15

17.5

20

22.5

25

26

28

30

32

34

36

38

40

42

44

46

VCC = 2 V

VCC = 3.3 V

VCC = 4.5 V

VCC = 6 V

Output Source Current (mA)

0

2.5

5

7.5

10

12.5

15

17.5

20

22.5

25

30

35

40

45

50

55

60

65

70

VCC = 2 V

VCC = 3.3 V

VCC = 4.5 V

VCC = 6 V

6

SN74HCS27

SCLS794A – FEBRUARY 2020 – REVISED JUNE 2020

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Product Folder Links: SN74HCS27

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Copyright © 2020, Texas Instruments Incorporated

6.7 Typical Characteristics

TA = 25°C

Figure 1. Output driver resistance in Low state

Figure 2. Output driver resistance in High state

Figure 3. Typical supply current versus input voltage across

common supply values (2 V to 3.3 V)

Figure 4. Typical supply current versus input voltage across

common supply values (4.5 V to 6 V)

7 Parameter Measurement Information

•

Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators

having the following characteristics: PRR

≤ 1 MHz, ZO = 50 Ω, tt < 2.5 ns.

•

The outputs are measured one at a time, with one input transition per measurement.

CL= 50 pF and includes probe and jig capacitance.

Figure 5. Load Circuit

Figure 6. Voltage Waveforms

Transition Times