MOTOROLA CMOS LOGIC DATA

3

MC14561B

Characteristic

Symbol

VDD

Min

Typ #

Max

Unit

Output Rise and Fall Time

tTLH, tTHL = (1.5 ns/pF) CL + 25 ns

tTLH, tTHL = (0.75 ns/pF) CL + 12.5 ns

tTLH, tTHL = (0.55 ns/pF) CL + 9.5 ns

tTLH,

tTHL

5.0

10

15

—

—

—

100

50

40

200

100

80

ns

Propagation Delay Time

tPLH, tPHL = (1.7 ns/pF) CL + 315 ns

tPLH, tPHL = (0.66 ns/pF) CL + 127 ns

tPLH, tPHL = (0.5 ns/pF) CL + 95 ns

tPLH,

tPHL

5.0

10

15

—

—

—

400

160

120

1000

400

300

ns

* The formulas given are for the typical characteristics only at 25

_C.

#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. Switching Time Waveforms

ANY INPUT

ANY OUTPUT

20 ns

20 ns

VDD

VSS

VOH

VOL

90%

50%

10%

90%

50%

10%

tTLH

tTHL

tPLH

tPHL