MC14555B, MC14556B

http://onsemi.com

3

Characteristic

Symbol

Min

Typ

(Note 6)

Max

Unit

Output Rise and Fall Time

5.0

10

15

−

−

−

100

50

40

200

100

80

ns

Propagation Delay Time − A, B to Output

5.0

10

15

−

−

−

220

95

70

440

190

140

ns

Propagation Delay Time − E to Output

5.0

10

15

−

−

−

200

85

65

400

170

130

ns

5. The formulas given are for the typical characteristics only at 25

°C.

6. Data labelled “Typ” is not to be used for design purposes but is intended as an indication of the IC’s potential performance.

Figure 1. Dynamic Power Dissipation Signal Waveforms

Figure 2. Dynamic Signal Waveforms

f in respect to a system clock.

INPUT E LOW

20 ns

20 ns

90%

50%

10%

2f

1

A INPUTS

(50% DUTY CYCLE)

B INPUTS

(50% DUTY CYCLE)

OUTPUT Q1

20 ns

20 ns

90%

50%

10%

90%

50%

10%

90%

50%

10%

INPUT A HIGH, INPUT E LOW

INPUT B

OUTPUT Q3

MC14556B

OUTPUT Q3

MC14555B

LOGIC DIAGRAM

(1/2 of Dual)

*Eliminated for MC14555B

*

*

*

*

Q0

Q1

Q2

Q3

E

B

A