ST72334J4B3 查看數據表（PDF） - STMicroelectronics

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产品描述 (功能)

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ST72334J4B3

8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, SCI INTERFACES

STMicroelectronics 

ST72334J/N, ST72314J/N, ST72124J

SUPPLY, RESET AND CLOCK CHARACTERISTICS (Cont’d)

CRYSTAL AND CERAMIC RESONATOR OSCILLATORS

Symbol

Parameter

Condition s

Min Typ 1) Max Unit

fOSC

CLi

IDD

tSTART

Oscillator Frequency 2)

Load

Capacitance

Low speed

Medium-low speed

Medium-high speed

High speed

Supply

Current

Low speed

Medium-low speed

Medium-high speed

High speed

Oscillator start-up time

Low speed resonator

Medium-low speed resonator

Medium-high speed resonator

High speed resonator

RSmax=200Ω

RSmax=200Ω

3)

3)

RSmax=200Ω

RSmax=100Ω

3)

3)

1

>2

>4

>8

38 4)

32 4)

18 4)

15 4)

2

4

8

MHz

16

47

56 4)

39

22

46 4)

26 4)

pF

18

21 4)

150 700 5)

200 700 5)

400 750 5)

µA

700 1100 5)

Depends on resonator quality. A typical value is 10ms

EXTERNAL RC OSCILLATO R

Symbol

fOSC

REX

CEX

IDD

Parameter

External RC Oscillator Frequency

Oscillator External Resistance

Oscillator External Capacitance

Supply Current

Condition s

VDD=5V

Min 4)

1

10

0 6)

Typ 1)

33

47

525

Max

14 4)

47 4)

470 4)

750 5)

Unit

MHz

kΩ

pF

µA

INTERNAL RC OSCILLATOR

Symbol

Parameter

fOSC

IDD

Internal RC Oscillator Frequency

Supply Current

Condition s

VDD=5.5V

VDD=3.0V

Min Typ 1) Max Unit

3.50 4.25 5.00

MHz

3.35 4.10 4.85

500 750 5) µA

CLOCK SECURITY SYSTEM (CSS)

Symbol

Parameter

fSFOSC

fCFL

IDD

Safe Oscillator Frequency

Clock Filter Frequency limitation

Supply Current

Conditions

VDD=5.5V

VDD=3.0V

Min

Typ 1)

Max

Unit

250

340

430

kHz

190

260

330

30

MHz

150

350 5)

µA

Notes:

1) Unless otherwise specified, typical data are based on TA=25°C and VDD-VSS=5V. They are given only as design guide-

lines and are not tested.

2) These data are based on typical RSmax. The oscillator selection can be optimized in terms of supply current with high

quality resonator.

3) RSmax is the equivalent serial resistance of the crystal or ceramic resonator.

4) Data based on design simulation and/or technology characteristics, not tested in production.

5) Data based on characterization results, not tested in production.

6) In this condition, the capacitor to be considered is the global parasitic capacitor. In this case, the RC oscillator frequen-

cy tuning has to be done by trying out several resistor values.

110/125

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