Electrical characteristics

M74HC280

8/14

DocID1938 Rev 2

Figure 4. Test circuit

1. Legend:

CL = 50 pF or equivalent (includes jig and probe capacitance).

RT = ZOUT of pulse generator (typically 50 Ω).

Table 7. AC electrical characteristics

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

Symbol

Parameter

Test condition

Value

Unit

VCC (V)

TA = 25 °C

-40 to 85 °C

-55 to 125 °C

Min.

Typ.

Max.

Min.

Max.

Min.

Max.

tTLH, tTHL

Output transition

time

2.0

-

30

75

-

95

-

110

ns

4.5

8

15

19

22

6.0

7

13

16

19

tPLH, tPHL

Propagation delay

time (input to

ΣEVEN, ΣODD)

2.0

80

200

250

290

ns

4.5

26

40

50

58

6.0

22

34

43

49

Table 8. Capacitive characteristics

Sym

Parameter

Test condition

Value

Unit

VCC (V)

TA = 25°C

-40 to 85 °C

-55 to 125 °C

Min

Typ

Max

Min

Max

Min

Max

CIN

Input capacitance

5.0

-

510

-

10

-

10

pF

CPD

Power dissipation

capacitance(1)

61

1. CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current

consumption without load (refer to test circuit). Average operating current can be obtained by the following equation:

ICC(opr) = CPD x VCC x fIN + ICC.

GAMS0301141630CB