Oscillator Divider Options for the LC651431N/LC651432N, LC651431F/LC651432F, and

LC651431L/LC651432L

No. 6498-10/39

LC651432N/F/L, 651431N/F/L

LC651432N, LC651431N

Oscillator type

Frequency

Divider option (cycle time)

Notes

Ceramic oscillator

400 kHz

1/1 (10 µs)

3 to 6 V

The divide-by-three and divide-by-four

circuits cannot be used.

800 kHz

1/1 (5 µs)

3 to 6 V

1/3 (15 µs)

3 to 6 V

1/4 (20 µs)

3 to 6 V

1 MHz

1/1 (4 µs)

3 to 6 V

1/3 (12 µs)

3 to 6 V

1/4 (16 µs)

3 to 6 V

4 MHz

1/3 (3 µs)

3 to 6 V

The no-divider (1/1) option cannot be used.

1/4 (4 µs)

3 to 6 V

Single-pin external clock input

200 to 1444 kHz

1/1 (20 to 2.77 µs)

3 to 6 V

600 to 4330 kHz

1/3 (20 to 2.77 µs)

3 to 6 V

800 to 4330 kHz

1/4 (20 to 3.70 µs)

3 to 6 V

External clock provided by a

As above

2-pin RC oscillator circuit

2-pin RC oscillator

Using the no-divider (1/1) option and the

3 to 6 V

recommended circuit constants. If the use of circuit

values other than the recommended values is unavoidable, the

single-pin external clock input option must be strictly observed.

External clock used with the

The IC cannot be driven by an external clock with this option. If external clock drive is required, select either the external

ceramic oscillator option

clock option or the 2-pin RC oscillator option

LC651432F, LC651431F

Oscillator type

Frequency

Divider option (cycle time)

Notes

Ceramic oscillator

4 MHz

1/1 (1 µs)

3 to 6 V

Single-pin external clock input

200 to 4330 kHz

1/1 (20 to 0.92 µs)

3 to 6 V

External clock used with the

The IC cannot be driven by an external clock with this option. If external clock drive is required, select the external clock

ceramic oscillator circuit

option.

LC651432L, LC651431L

Oscillator type

Frequency

Divider option (cycle time)

Notes

Ceramic oscillator

400 kHz

1/1 (10 µs)

2.2 to 6 V

The divide-by-three and divide-by-four

circuits cannot be used.

4 MHz

1/4 (4 µs)

2.2 to 6 V

The no-divider (1/1) and divide-by-three option

cannot be used.

Single-pin external clock input

200 to 1040 kHz

1/1 (20 to 3.84 µs)

2.2 to 6 V

600 to 3120 kHz

1/3 (20 to 3.84 µs)

2.2 to 6 V

800 to 4160 kHz

1/4 (20 to 3.84 µs)

2.2 to 6 V

External clock provided by a

As above

2-pin RC oscillator circuit

2-pin RC oscillator

Using the no-divider (1/1) option and the

2.2 to 6 V

recommended circuit constants. If the use of circuit

values other than the recommended values is unavoidable, the

single-pin external clock input option must be strictly observed.

External clock used with the

The IC cannot be driven by an external clock with this option. If external clock drive is required, select either the external

ceramic oscillator option

clock option or the 2-pin RC oscillator option