DA9062 datasheet(62/101 Pages) RENESAS

62 / 101 page

DA9062

PMIC for Applications Requiring up to 8.5 A

Datasheet

Revision 3.8

15-Feb-2022

CFR0011-120-00

62 of 99

10.1.4

Crystal

The real-time clock module requires an external 32.768 kHz crystal. For correct component selection,

the effective load capacitance must be taken into account. This includes external capacitors on pins

XTAL_IN and XTAL_OUT in series combination, plus the PCB and stray capacitances. For example,

if two 12 pF external capacitors are used, resulting in a total capacitance of 6 pF, and assuming the

stray capacitances are 3 pF, then a crystal that specifies a load capacitance of 9 pF should be

chosen. Different stray capacitances may require different external capacitors and/or a different

crystal type. Furthermore, the series resistance of the crystal must not exceed 100 k

Ω.

Table 36: Recommended Crystal

Type

Size (W×L×H) mm

Manufacturer

CC7V-T1A 32.768 kHz 9.0 pF ±30 ppm

3.2×1.5×0.9

Micro Crystal

10.1.5

Backup Battery

The backup battery charger supports lithium coin cells as well as Supercaps/Goldcaps.

Table 37: Recommended Backup Battery

Type

Size (mm)

Manufacturer

Lithium Battery (rechargeable) ML421, 2.3 mAh, 3.0 V

4.8 (dia.) x 2.1

Panasonic

Starcap SC SM 2R8, 0.1 F, 2.8 V

4.8 (dia.) x 1.4

Korchip

Lithium Battery (rechargeable) ML614, 3.4 mAh, 3.0 V

6.8 (dia.) x 1.4

Panasonic

DA9062 Datasheet(PDF) 62 Page - Renesas Technology Corp