ST10F273E datasheet(152/179 Pages) STMICROELECTRONICS

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Electrical characteristics

ST10F273E

152/179

24.8.11

Main oscillator specifications

VDD = 5V ± 10%, VSS = 0V, TA = –40°C to +125°C

Figure 45.

Crystal oscillator and resonator connection diagram

TJIT

Single period jitter (1)

(cycle to cycle = 2 TCL)

6 sigma time period variation

(peak to peak)

–500

+500

Ffree

PLL free running frequency

Multiplication factors: 3, 4

Multiplication factors: 5, 8, 10, 16

250

500

2000

4000

kHz

Not 100% tested, guaranteed by design characterization.

Table 71.

PLL characteristics [VDD = 5V ± 10%, VSS = 0V, TA = –40°C to +125°C]

Symbol

Parameter

Conditions

Value

Unit

Min.

Max.

Table 72.

Main oscillator characteristics

Sym

bol

Parameter

Conditions

Value

Unit

Min.

Typ.

Max.

Oscillator

transconductance

817

mA/V

VOSC Oscillation amplitude

(1)

Not 100% tested, guaranteed by design characterization.

Peak to peak

–

VDD – 0.4

–

VAV

Oscillation voltage level(1) Sine wave middle

VDD / 2 – 0.25

–

tSTUP Oscillator start-up time

(1)

Stable VDD - crystal

Stable VDD -resonator

Table 73.

Main oscillator negative resistance (module)

CA =

12pF

15pF

18pF

22pF

27pF

33pF

39pF

47pF

4MHz

460

Ω

550

Ω

675

Ω

800

Ω

840

Ω

1000

Ω

1180

Ω

1200

Ω

8MHz

380

Ω

460

Ω

540

Ω

640

Ω

580

Ω

12 MHz

370

Ω

420

Ω

360

Ω

----

crystal

Resonator

ST10F273E

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