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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)
V
DD
range
3 to 6 V
Notes
Ceramic oscillator
400 kHz
1/1 (10 μs)
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
2-pin RC oscillator circuit
As above
2-pin RC oscillator
Using the no-divider (1/1) option and the
recommended circuit constants. If the use of circuit
values other than the recommended values is unavoidable, the
frequencies, divider options, and V
DD
ranges specified for the
single-pin external clock input option must be strictly observed.
3 to 6 V
External clock used with the
ceramic oscillator option
The IC cannot be driven by an external clock with this option. If external clock drive is required, select either the external
clock option or the 2-pin RC oscillator option
LC651432F, LC651431F
Oscillator type
Frequency
Divider option (cycle time)
V
DD
range
3 to 6 V
Notes
Ceramic oscillator
4 MHz
1/1 (1 μs)
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
ceramic oscillator circuit
The IC cannot be driven by an external clock with this option. If external clock drive is required, select the external clock
option.
LC651432L, LC651431L
Oscillator type
Frequency
Divider option (cycle time)
V
DD
range
2.2 to 6 V
Notes
Ceramic oscillator
400 kHz
1/1 (10 μs)
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
2-pin RC oscillator circuit
As above
2-pin RC oscillator
Using the no-divider (1/1) option and the
recommended circuit constants. If the use of circuit
values other than the recommended values is unavoidable, the
frequencies, divider options, and V
DD
ranges specified for the
single-pin external clock input option must be strictly observed.
2.2 to 6 V
External clock used with the
ceramic oscillator option
The IC cannot be driven by an external clock with this option. If external clock drive is required, select either the external
clock option or the 2-pin RC oscillator option