Schematics
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
BQB_UART_IN
BQB_UART_OUT
Note:
Must be placed
the reserved 0 ohm
resistor for BQB Uart test.
RFIO
Note:
BT_WAKE_HOST is "EEPROM_SEL"
power on latch pin.
Must be placed the pull-low 10 kohm
resistor to GND.
Note:
"DIS_BT_N" pin could be
connected to the host to
implement reset function.
Note:
3.3 V power pin recommended cap type is X5R/10V or above.
1.2 V power pin recommended cap type is X5R/6.3V or above.
RF power pin (Pin 13, 14, 16 & 17) cap value can not
be less than 1 uF.
USB plug-in
connection
40MHz xtal clock
Note:
1. The spec of 40 MHz xtal is with
recommended loading cap 9 pF.
2. The loading capacitance is implemented
in RTL8761BUV IC, C12 & C13 sould be
NC but must be placed for reservation.
Note:
BT_STE is "TEST_MODE_SEL" power on latch pin.
Must be placed the pull-low 10 kohm resistor to GND.
Note:
If SPS mode, then R11 10k ohm pull-low, R21 NC and L2 2.2 uH.
If LDO mode, then R11 NC, R21 10k ohm pull-high and L2 0 ohm.
Note:
BT_VD12SYN power pin must be placed
1 uF and 2 pF capacitor in parallel.
C7(4.7 uF) -> C6(0.1 uF) -> Pin1
placing order in PCB layout
C39 must be placed
for DC Blocking
Depending on antenna design,
this pi-matching is decided by customer
RFIO & pi-matching circuit
BQB Uart_Out
BQB Uart_In
I2C_SCL
I2C_SDA
VDD3V3
BT_WAKE_HOST
VDD1V2
VDD3V3
BT_RFIO
VDD1V2
DIS_BT_N
VDD1V2
XO
XI
BT_STE
VDD3V3
PCM_IN
PCM_OUT
PCM_SYNC
PCM_CLK
P_LED0
VDD3V3
VDD1V2
LX_CORE
XI
XO
VDD1V2LX_CORE
HSDM
HSDP
VDD3V3
BT_RFIOANT
I2C_SDA
I2C_SCL
VDD3V3
HSDP
HSDM
P_LED0
VD33
VD33
VD33
VCC3.3V
VCC3.3V
USB_5V
VCC3.3V
VCC3.3V
Title
Size Document Number Rev
Date: Sheet of
<Doc> AA2
1 1Tuesday, February 11, 2020
RTL8761BUV_QFN32
RTL8761BUV/BTV
Title
Size Document Number Rev
Date: Sheet of
<Doc> AA2
1 1Tuesday, February 11, 2020
RTL8761BUV_QFN32
RTL8761BUV/BTV
Title
Size Document Number Rev
Date: Sheet of
<Doc> AA2
1 1Tuesday, February 11, 2020
RTL8761BUV_QFN32
RTL8761BUV/BTV
C56 10pFC56 10pF
L1
BEAD/0402
L1
BEAD/0402
C6
0.1uF
C6
0.1uF
C17
1uF
C17
1uF
R18
10K
R18
10K
C1
0.1uF
C1
0.1uF
R3
10K
R3
10K
D2
BLE_LED
D2
BLE_LED
C9 0.1uFC9 0.1uF
R15
10K
R15
10K
C57C57
CON1
MINI USB Connector
CON1
MINI USB Connector
D+
3
D-
4
VBUS
5
ID
2
GND0
1
GND1
6
GND2
7
R25
330R
R25
330R
C3
0.1u
C3
0.1u
TP6TP6
1
1
L2
0R
L2
0R
C58C58
R4
10K
R4
10K
R14 27R14 27
C4
0.1u
C4
0.1u
C19
4.7uF
C19
4.7uF
L6 3n9HL6 3n9H
L7L7
U3 GS2903Z33FU3 GS2903Z33F
VI
3
GND
1
VO1
2
R13
10K
R13
10K
TP7TP7
1
1
R2
10K
R2
10K
C18
1uF
C18
1uF
C54
1p2F
C54
1p2F
C20
0.1uF
C20
0.1uF
R22 1.5KR22 1.5K
H1H1
1
1
C11 1uFC11 1uF
R17 27R17 27
C10
0.1uF
C10
0.1uF
C15
2.2u
C15
2.2u
R4110K R4110K
C8
0.1uF
C8
0.1uF
C49 2pFC49 2pF
C12
10pF
C12
10pF
C7
4.7uF
C7
4.7uF
C2
0.1uF
C2
0.1uF
C13
10pF
C13
10pF
C14
0.1u
C14
0.1u
C55
1p2F
C55
1p2F
RTL8761BUV QFN32
U1
RTL8761B QFN32
RTL8761BUV QFN32
U1
RTL8761B QFN32
REG_IN
1
DM
2
DP
3
USB_33
4
GPIOB[2]/I2C_INT
5
GPIOB[1]/I2C_SCL
6
GPIOB[0]/I2C_SDA
7
VIO_SB
8
GPIOA[15]/CLK_REQ
9
GPIOA[13]/HOST_WAKE_BT
10
GPIOA[14]/BT_WAKE_HOST
11
GPIOA[11]/DIS_BT_N
12
BT_VD12RTXBB
13
BT_VD33PA
14
BT_RFIO
15
BT_VD12RTXFE
16
VIO_UART
24
GPIOA[7]/BT_ACT
23
GPIOA[6]/WLAN_ACT
22
GPIOA[4]/BT_STE
21
GPIOA[5]/32K_IN
20
XO
19
XI
18
BT_VD12SYN
17
REG_OUT
32
VDD12BT
31
VDDIO33
30
GPIOA[23]/LED[0]
29
GPIOA[3]/PCM_CLK
28
GPIOA[2]/PCM_SYNC
27
GPIOA[1]/PCM_OUT
26
GPIOA[0]/PCM_IN
25
EPAD
33
R1
10K
R1
10K
C5
2.2u
C5
2.2u
C16
1uF
C16
1uF
X1
40MHz
X1
40MHz
XTALP
1
GND
4
XTALP
3
GND
2