M41T82 datasheet(49/61 Pages) STMICROELECTRONICS

49 / 61 page

M41T82-M41T83

DC and AC parameters

Doc ID 12578 Rev 12

49/61

Figure 25.

ICC2 vs. temperature

Table 23.

Crystal electrical characteristics

Symbol

Parameter(1)(2)

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

145 (1.5 x 5 mm) and the KDS DT-38 (3 x 8 mm) for thru-hole, or the KDS DMX-26S (3.2 x 8 mm) or Micro

Crystal MS3V-T1R (1.5 x 5 mm) for surface-mount, tuning fork-type quartz crystals. For contact

information, see Section 8: References on page 59.

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

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 24.

Oscillator characteristics

Symbol

Parameter(1)(2)

With default analog calibration value ( = 0)

Reference value

Conditions

Min

Typ

Max

Units

VSTA

Oscillator start voltage

≤ 4 s

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 = 5.0 V

–10

+10

ppm

ai 13909

2.000

3.000

4.000

5.000

6.000

7.000

8.000

9.000

10.000

-40

-20

Temperature (°C)

(3.0V)

(5.0V)

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