74HC_HCT27_3

© NXP B.V. 2008. All rights reserved.

Product data sheet

Rev. 03 — 7 January 2008

6 of 16

NXP Semiconductors

74HC27; 74HCT27

Triple 3-input NOR gate

10. Dynamic characteristics

74HCT27

HIGH-level

input voltage

2.0

1.6

-

2.0

-

2.0

-

V

LOW-level

input voltage

-

1.2

0.8

-

0.8

-

0.8

V

HIGH-level

output voltage

4.4

4.5

-

4.4

-

4.4

-

V

3.98 4.32

-

3.84

-

3.7

-

V

LOW-level

output voltage

-

0

0.1

-

0.1

-

0.1

V

-

0.16

0.26

-

0.33

-

0.4

V

input leakage

current

--

±0.1

-

±1.0

-

±1.0

µA

-

-

2.0

-

20

-

40

µA

additional

supply current

per input pin;

nA, nB or nC inputs

-

150

540

-

675

-

735

µA

input

capacitance

-

3.5

-

-

-

-

-

pF

Table 6.

At recommended operating conditions; voltages are referenced to GND (ground = 0 V).

Symbol Parameter

Conditions

25

°C

−40 °C to +85 °C −40 °C to +125 °C Unit

Min

Typ

Max

Min

Max

Min

Max

Table 7.

Dynamic characteristics type 74HC27; 74HCT27

GND = 0 V; for load circuit see Figure 7.

Symbol Parameter

Conditions

25

°C

−40 °C to +125 °C Unit

Min

Typ

Max

Max

(85

°C)

Max

(125

°C)

74HC27

propagation delay

nA, nB, nC to nY; see Figure 6

[1]

-

28

90

115

135

ns

-

10

18

23

27

ns

-

8

-

-

-

ns

-

8

15

20

23

ns

transition time

see Figure 6

[2]

-

19

75

95

110

ns

-

7

15

19

22

ns

-

6

13

16

19

ns