Hi,
I am planning to establish communication between low powered battery operated Device(microcontroller) to NFC tag (Please find below image).

Please suggest the NXP-NFC device(tag) to fulfil the following requirements.
1) Application Specific :
a. Required Bi-directional communication, to exchange ~4kb of device configuration files between MCU and mobile App. (configuration can be WI-FI credentials, communication certificates, )
2) NFC tag specification:
a) Must be NFC certified
b) Power consumption shall be less than 5mA in operational mode (please refer ideal/sleep time consumption shall be in µA)
c) Bi-directional communication supportive tag
d) Max data transfer ~4kb of data need to transfer
Regards,
Suresh