MTK6253+SKY7755 dual band

MT6253+SKY77555 dual band V25

4

3

2

1

E601 ANTENNA nc C602 C611 6pF R601 APC 1K R602 47.5K C601 150pF C613 22pF R601 PAEN 1K C601 22pF J601 TST_PORT 27 8 7 6 5 4 3 2 1 U601 2 22pF 26 25 24 23 22 27nH L604 C627 0 C617 3 1 4 0R R604

VRF

D

BANDSW_DCS

D

Suggest to connect to VccRF(2.8V) to get better HB Low PCL isolation
R602 NC VLOGIC VRF

C603 nc L603 C604 nc C615 5.6pF 2 L601 0R VDD28_OPLL BLM15BB750SN1 1 C616 1uF 2 1 VRF_1

6 5

TX_EN

GND

GND

GND

GND

C618 PAIN_HB PAIN_LB C619 33pF 10pF

9 10 C611 nc 11 12 13

HB_IN LB_IN GND VBATT GND

VLOGIC

VRAMP

ANT GND

GND

nc C611

C615 close to VDD28_OPLL L603 close to VDD28_OPLL C616 close to VDD28_RFVCO
C

BS

C

nc L605

nc L604 VRF_1 VDD28_OPLL

SKY77555

GND GND GND

VBAT

U1D E21 F22 F24 H30 J33 K32 M30 C621 100nF 2 1uF C620 1 2 N31 P30 K34 L33 VDD28_OPL