8
8
7
7
6
6
5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
6. The Oscillator VCC should be clean, use a filter, such as an RC low pass or a ferrite inductor
1. Keep the lead lengths as short as possible, around 1/4 inch is sufficient
5. Do not route any switching signals under the external component (unless separated by a ground plane )
20mil
3. Put a ground plane under the Xtal component
20mil
RTC Discharge Circuit
RTC Layout Giude:
2. Minimize the capacitance between Xin and Xout component
BATTERY 3V
CR2032
VARTA LR
21-90767-05
BLUETOOTH
Confidential
RTC/ MDC CNN
0.5
PA1538/XA1526(FSC) PTB50/XTB70(FIC)
3FL.,NO.300,Yang Guang St.,NeiHu
114 TAIPEI, TAIWAN ,ROC
(883-2)8751-8751
C
39
61
Thursday, November 09, 2006
Title
Size
Document Number
Rev
Date:
Sheet
of
First International Computer, Inc.
RTC_VCC
18
PMU3V
48,52,54
CMOS_CLEAR 18,47
BT_LED
USB20_P6-
18
U
18
BT_ON
18,38
3VDDA
6,9,16,18,19,20,32,33,34,44,45,46,47,48,51,54,55,56
3VDDA
6,9,16,18,19,20,32,33,34,44,45,46,47,48,51,54,55,56
CN31
CON ACES 87213-0800G(PITH-1) SMD 8PIN BLUETOOTH B TO M/B WIRE LR
20-25243-00
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
C178
0.1uF 16V 80-20% SMT0402 Y5V LR
R366
0 5% 1/16W 0603 LR
1
2
CN27
CON ACES SMT 85205-0200L (LEAD FREE) 2PIN P=1.25
20-21310-10
1
2
3
4
C494
220pF 50V 10% SMT0402 X7R LR
C882
0.1uF 16V 80-20% SMT0402 Y5V LR
R365
51
Ω
1% 1/10W SMT0603 LR
C626
0.1uF 16V 80-20% SMT0402 Y5V LR
D37
DIODE STKY RB751V-40 40V 200mA SOD-323 2PIN PSI LR
P
N
Q71
NPN PDTC144EU SOT-323 PHILIPS LR
E
C
B
C185
10uF 6.3V 10% SMT0805 X5R C2012X5R0J106K TDK LR
D38
DIODE STKY RB751V-40 40V 200mA SOD-323 2PIN PSI LR
P
N
R124
100
Ω
1% 1/10W SMT0603 LR
R457
1K
Ω
5% 1/16W SMT0402 LR
R363
1K
Ω
1% 1/10W SMT0603 LR
