STR730FZ1T7 datasheet(32/53 Pages) STMICROELECTRONICS

32 / 53 page

Electrical parameters

STR73xF

32/53

Min and Max values are guaranteed by characterization, not tested in production.

CP represents the total capacitance between XTAL1 and XTAL2, including the shunt capacitance of the

external quartz crystal as well as the total board parasitic cross-capacitance between XTAL1 track and

XTAL2 track.

C1 represents the total capacitance between XTAL1 and ground, including the external capacitance tied to

XTAL1 pin (CL) as well as the total parasitic capacitance between XTAL1 track and ground (this includes

application board track capacitance to ground and device pin capacitance).

C2 represents the total capacitance between XTAL2 and ground, including the external capacitance tied to

XTAL1 pin (CL) as well as the total parasitic capacitance between XTAL2 track and ground (this includes

application board track capacitance to ground and device pin capacitance).

Feedback resistor

fOSC = 4 MHz

Cp2) = 10pF

3) = C

4)=

10pF

150

555

Ω

C1 = C2 = 20pF 490 1035

C1 = C2 = 30pF 490 1030

C1 = C2 = 40pF 380

850

fOSC = 5 MHz

Cp = 10pF

C1 = C2 = 10pF 160

470

C1 = C2 = 20pF 415

800

C1 = C2 = 30pF 340

735

C1 = C2 = 40pF 260

580

fOSC = 6 MHz

Cp = 10pF

C1 = C2 = 10pF 160

415

C1 = C2 = 20pF 325

640

C1 = C2 = 30pF 250

550

C1 = C2 = 40pF 180

420

fOSC = 7 MHz

Cp = 10pF

C1 = C2 = 10pF 160

375

C1 = C2 = 20pF 260

525

C1 = C2 = 30pF 185

420

C1 = C2 = 40pF 135

315

fOSC = 8MHz

Cp = 10pF

C1 = C2 = 10pF 155

340

C1 = C2 = 20pF 210

435

C1 = C2 = 30pF 145

335

C1 = C2 = 40pF 100

245

Symbol

Parameter

Conditions

Value

Unit

Min

Typ

Max

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