LC651432F Просмотр технического описания (PDF) - SANYO -> Panasonic

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LC651432F

Four-Bit CMOS Microcontrollers for Small-Scale Control Applications

SANYO -> Panasonic 

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

LC651431N and LC651432N RC Oscillator Characteristics

Figure 8 shows the LC651431N and LC651432N RC oscillator characteristics.

However, the LC651431N and LC651432N have the following RC oscillator frequency sample-to-sample variations.

1) VDD = 3.0 to 6.0 V, Ta = –40 to 85°C

When the external circuit constants are: Cext = 220 pF, and

Rext = 12 kΩ, the frequency range will be:

284 kHz ≤ fMOSC ≤ 790 kHz

2) VDD = 3.0 to 6.0 V, Ta = –40 to 85°C

When the external circuit constants are: Cext = 220 pF, and

Rext = 6.8 kΩ, the frequency range will be:

595 kHz ≤ fMOSC ≤ 1274 kHz

Note that only the above circuit constants are guaranteed.

If using other values for these constants is unavoidable, use values in the following ranges.

Cext = 150 to 390 pF

Rext = 3 to 20 kΩ

(See figure 8.)

Notes: 10. The oscillator frequency must be in the range 350 to 750 kHz when VDD = 5.0 V and Ta = 25°C.

11. Applications must assure adequate margins so that oscillator frequency falls in the operating clock frequency range (in the oscillator divider option

table) for the ranges VDD = 3.0 to 6.0 V and Ta = –40 to 85°C.

1.5

1000

9

8

7

6

5

4

3

2

f MOSC–Rext

C = 150p

These characteristics curves

are for reference purposes only.

These characteristics are not

guaranteed.

C = 270p

C = 390p

1000

VDD = 5 (V)

Ta = 25°C

3 45

1

2

3 45

10

Rext [kΩ]

Figure 8 RC Oscillator Frequency Data (representative values)

No. 6498-20/39

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