Specifications

- 13 -
Fig 7 BL3390-I Recommended pad size
4.5 Power Supply Requirement
If an DCDC is used to supply the module with 3.3V power, C1 capacitor can be considered to
be used with 10u-22u,
Please ensure that the power supply can provide enough current to avoid power loss when
sending data to the module. The maximum input current of the module is recommended to be
greater than 1A.
4.6. Certifications
1. Compliant and certified with SRRC standard (CMIIT ID: xxxxxxxxxx).