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Schematic Diagrams
USB RTC (71-88800-D04) - For 8880 D - 23
8880 Schematic Diags
USB RTC
Sheet 22 of 45
USB RTC (8880)
SYS5V VCC_RTC
VCC_RTC
USBVCC0
VCC5
SYS3V
VCC5
USBVCC2
USBVCC0
USBVCC2
VCC5
USBVCC3
VCC5
USBVCC4
USBVCC3
USBVCC4
VCC5
USBVCC0
USBVCC2
VCC5
USBVCC4
USBVCC3
USBP0-
RTC_VBIAS
RTC_RST#
USBP0+
VCCRTC
USBP2-
USBP2+
OC0#
OC2#
USBP4-
USBP4+
USBP3-
USBP3+
OC3#
OC4#
D44
F01J2E
A C
D43
F01J2E
AC
C782
1U(0805)
J8JOPEN
2 1
CN9
USB-PLUG
5
6
7
8
1
2
3
4
9
10
11
12
V+_OUT1
DATA_L1
DATA_H1
GND
V+_OUT2
DATA_L2
DATA_H2
GND
GND
GND
GND
GND
C88
47P(R)
C87
47P(R)
R59 18.2_1%
R58 18.2_1%
C478
47P
C471
47P
C479
0.1U
L58
HF50ACB321611T
C472
10U(1206)(R)
F4 FUSE_1210(R)
1 2
R643 18.2_1%
R644 18.2_1%
BAT1
R269
560K
R273 470K
R335 470K
R340
560K
C491
47P
C910
47P(R)
F5 FUSE_1210(R)
1 2
C495
0.1U
L61
HF50ACB321611T
C359
47P
C492
10U(1206)
R640 18.2_1%
C89
47P(R)
C345
0.1U
CN10
USB-PLUG
5
6
7
8
1
2
3
4
9
10
11
12
V+_OUT1
DATA_L1
DATA_H1
GND
V+_OUT2
DATA_L2
DATA_H2
GND
GND
GND
GND
GND
L46
HF50ACB321611T
F2 FUSE_1210(R)
1 2
R57 18.2_1%
R639 18.2_1%
C493
47P
C366
47P
C86
47P(R)
C362
10U(1206)(R)
R56 18.2_1%
C85
47P(R)
R253 470K
R251
560K
R370
560K
R366 470K
C326
4.7U(1206)
C480
10U(1206)
U30
RT9701CBL
1
2
3
4
5
VOUT
GND
VIN
VIN
VOUT
U28
RT9701CBL
1
2
3
4
5
VOUT
GND
VIN
VIN
VOUT
C354
10U(1206)
C494
10U(1206)
C346
0.1U
C497
4.7U(1206)
C496
0.1U
C385
10U(1206)
C380
4.7U(1206)
C481
0.1U
C384
0.1U
C490
4.7U(1206)
L52 BK1608HS121
L54 BK1608HS121
L57 BK1608HS121
L56 BK1608HS121
L47 BK1608HS121
L48 BK1608HS121
L60 BK1608HS121
L59 BK1608HS121
C92
47P(R)
R110 1K
C175
0.047U
R90
750_1%
R96
2K_1%
R560
560
R537 15K
C783
1U(0805)
J5
JOPEN
21
R529
1K
C393
10U(1206)(R)
C387
0.1U
C392
47P
C388
47P
C93
47P(R)
F3 FUSE_1210(R)
1 2
L49
HF50ACB321611T
R538 1K
D45
1SS355
A C
USBP0+21
USBP0-21
USBP2-21
USBP2+21
VCCRTC 21
RTC_RST# 21
RTC_VBIAS 21
OC0#21
OC2#21
USBP3-21
USBP3+21
USBP4-21
USBP4+21
OC3#21
OC4#21
RTC Circuitry
PLACE NEAR ICH3
PLACE NEAR ICH3
Close to USB-PLUG
Close to USB-PLUG