TLH10837 – 10

FIGURE 7 Cascaded Operation for Long Delays

Binary Pattern Generation

In astable operation as shown in

Figures 8 and 9 the out-

put of the LM2240 appears as a complex pulse pattern if

more than one of its switches is closed The waveform of

the output pulse train can be determined directly from the

timing diagram of

Figure 2 which shows the phase relations

between the counter outputs

Figures 10 and 11 show some

of the complex pulse patterns that can be generated The

pulse pattern repeats itself at a rate equal to the period of

the highest counter bit connected to the common output

bus The minimum pulse width contained in the pulse train is

determined by the lowest counter bit connected to the out-

put

TLH10837 – 11

FIGURE 8 Astable Operation

with Trigger and Reset Inputs

TLH10837 – 12

FIGURE 9 Free Running Astable Operation

TLH10837 – 13

FIGURE 10 Binary Pulse Patterns Obtained

by Shorting Various Counter Outputs

8