M41T83RM6F datasheet(48/58 Pages) STMICROELECTRONICS

48 / 58 page

DC and ac parameters

M41T82 M41T83

48/58

Table 21.

Crystal electrical characteristics

Symbol

Parameter(1) (2)

Externally supplied if using the QFN16 or SO8 package. STMicroelectronics recommends the Citizen CFS-

145 (1.5x5mm) and the KDS DT-38 (3x8mm) for thru-hole, or the KDS DMX-26S (3.2x8mm) for surface-

mount, tuning fork-type quartz crystals

KDS can be contacted at kouhou@kdsj.co.jp or http://www.kdsj.co.jp.

Citizen can be contacted at csd@citizen-america.com or http://www.citizencrystal.com.

Load capacitors are integrated within the M41T8x. Circuit board layout considerations for the 32.768kHz

crystal of minimum trace lengths and isolation from RF generating signals should be taken into account.

Min

Typ

Max

Units

Resonant frequency

32.768

kHz

Series resistance

65(3)

Guaranteed by design.

Load capacitance

12.5

Table 22.

Oscillator characteristics

Symbol

Parameter(1) (2)

With default analog calibration value ( = 0).

Reference value.

Conditions

Min

Typ

Max

Units

VSTA

Oscillator start voltage

≤ 4s

2.0

tSTA

Oscillator start time

VCC = VSO

CXI, CXO

(1)

Capacitor Input, Capacitor Output

IC-to-IC frequency variation(2) (3)

TA = 25°C, VCC = 5.0V.

–10

+10

ppm

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