ST62T03LMC/CCCE View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST62T03LMC/CCCE

8-BIT MCUs WITH A/D CONVERTER, TWO TIMERS, OSCILLATOR SAFEGUARD & SAFE RESET

STMicroelectronics 

ST6200CM-Auto/ ST6201CM-Auto/ST6203CM-Auto

CLOCK AND TIMING CHARACTERISTICS (Cont’d)

11.5.4 RC Oscillator

The ST6 internal clock can be supplied with an external RC oscillator. Depending on the RNET value, the

accuracy of the frequency is about 20%, so it may not be suitable for some applications.

Symbol

Parameter

fOSC

RC oscillator frequency 1)

RNET

RC Oscillator external resistor 2)

Conditions

Min

RNET=22 kΩ

7.2

RNET=47 kΩ

5.1

RNET=100 kΩ

3.2

RNET=220 kΩ

1.8

RNET=470 kΩ

0.9

RNET=22 kΩ

3.7

RNET=47 kΩ

2.8

RNET=100 kΩ

1.8

RNET=220 kΩ

1

RNET=470 kΩ

0.5

see Figure 46 & Figure 47 22

Typ

8.6

5.7

3.4

1.9

0.95

4.3

3

1.9

1.1

0.55

Max Unit

10

6.5

3.8

2

1.1

MHz

4.9

3.3

2

1.2

0.6

870 kΩ

Notes:

1. Data based on characterization results, not tested in production. These measurements were done with the OSCin pin

unconnected (only soldered on the PCB).

2. RNET must have a positive temperature coefficient (ppm/°C), carbon resistors should therefore not be used.

Figure 45. Typical Application with RC Oscillator

EXTERNAL RC

OSCOUT

RNET

OSCIN

NC

fOSC

VDD

VDD

VDD

MIRROR

CURRENT

CEX~9pF DISCHARGE

ST62XX

70/96

1

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