Datasheet

PUR
S2
+3V3
+5V
+5V
+3V3
+5V
+3V3
+3V3
+3V3
+3V3
+3V3
+3V3
+3V3
VDD
+3V3
VDD
+3V3
+3V3
+3V3
+3V3
+3V3
+3V3
+3V3
+3V3
VDD
SDA SCL
POR
PWR_EN
VDD_ON
PWR_EN
POR
SCL SDA EEPROM_WP
SDATA_A CE_A SDA
TA_B
SDA
TA_C
CE_B CE_C OPAMP_RD_A SDATA_D CE_D OPAMP_RD_B
VDD_ON
OP
AMP_RD_C
OPAMP_RD_D
OP
AMP_EN_A
OPAMP_EN_B OPAMP_EN_C OPAMP_EN_D
LVPECL_TERM_D LVPECL_TERM_C LVPECL_TERM_B LVPECL_TERM_A
VDD_A_ON VDD_B_ON VDD_C_ON VDD_D_ON
MMBT4401
NPN
ControlPower
(EXTSupply5V)
CostumerEVMRevissionControlS2=1S3=0
LabEVMRevissionControlS2=0S3=0
Default=LVPECLTermination
Default=LVPECLTermination
Default=LVPECLTermination
Default=LVPECLTermination
EnableonlyoneOP-AMPatatime
CommunicationGood
DevicePower
+
C35
22uF/20VLowESR
+
C35
22uF/20VLowESR
1
2
R79
450
R79
450
C37
10uF/6.3V
C37
10uF/6.3V
C42
0.1uF
C42
0.1uF
3
1
2
Q4
2N2222A
Q4
2N2222A
EN#
3
IN1
5
OUT1
7
SENSE
1
OUT2
8
IN2
6
GND
4
RESET#
2
U2
TPS77333DGK
U2
TPS77333DGK
C38
1uF
C38
1uF
1 2
R82
10k
R82
10k
1
2
R31
1.5k
R31
1.5k
1
2
R80
100k-NP
R80
100k-NP
1
2
R50
1M
R50
1M
1 2
R51
1.5k
R51
1.5k
1
2
12MHZ1
ECS-120-S-5P-TR
12MHZ1
ECS-120-S-5P-TR
Vcc
8
SDA
5
A0
1
A1
2
A3
3
Vss
4
SCL
6
WP
7
U4 24LC512 U4 24LC512
1 2
R72
10k
R72
10k
D26
LEDGREEN
D26
LEDGREEN
12
C32
33pF
C32
33pF
1
2
R77
10k
R77
10k
1 2
R49
1.5k
R49
1.5k
1 2
R71
10k
R71
10k
1 3
2
JP1JP1
P4
VDD_EX
P4
VDD_EX
+
C31
22uF/20VLowESR
+
C31
22uF/20VLowESR
12
C29
33pF
C29
33pF
D8
MBRS2040LT3
D8
MBRS2040LT3
1
2
R733 R733
D25
LEDGREEN
D25
LEDGREEN
1
2
R515k R515k
3
1
2
Q1
2N2222A
Q1
2N2222A
1
2
R85
250
R85
250
GND
3
GND/HS1
1
GND/HS8
20
NC1
18
GND/HS7
19
GND/HS2
2
NC2
17
NC
4
EN_
5
IN1
6
IN2
7
_RESET
16
FB
15
OUT2
14
OUT1
13
GND/HS6
12
GND/HS5
11
GND/HS3
9
GND/HS4
10
NC3
8
GND/PWRPAD
21
U3
TPS76701QPWP
U3
TPS76701QPWP
1
2
R633 R633
1
2
R9310k R9310k
1
2
R4
1.5k
R4
1.5k
DM0
19
DP0
18
SDA
11
X1
61
X2
60
GND2
24
GND1
5
SCL
12
PUR
17
TEST1
15
TEST0
14
GND3
42
RST
13
GND4
59
VCC1
10
VCC2
39
P30/RxD/S0
58
P31/TxD/S1
57
P32
56
P34/T0
54
P00
43
P01
44
P02
45
P03
46
P04
47
P05
48
P06
49
P07
50
VCC3
62
SUSP
16
P1.0
31
P1.1
32
P1.2
33
P1.3
34
P1.4
35
P1.5
36
P1.6
40
P1.7
41
P2.0
22
P2.1
23
P2.2
25
P2.3
26
P2.4
27
P2.5
28
P2.6
29
P2.7
30
VREN
38
VDDOUT
37
S2
8
S3
9
P33/INT1
55
P35
53
P36
52
P37
51
SELF/BUS
21
TEST2
20
1
1
2
2
3
3
4
4
6
6
7
7
63
63
64
64
U1
TUSB3210
U1
TUSB3210
C43
1uF
C43
1uF
12
R21
15K
R21
15K
C40
0.1uF
C40
0.1uF
3 1 2 4
5 6
+5V
DM
DP
GND
J1
TypeBUSB-Shield
+5V
DM
DP
GND
J1
TypeBUSB-Shield
1 2
R59
10k
R59
10k
1 2
R65
301
R65
301
P5
GND
P5
GND
1
2
R30 1.5kR30 1.5k
1
2
C28
0.1uF
C28
0.1uF
C33
1uF
C33
1uF
D24
LEDGREEN
D24
LEDGREEN
1
2
3
J3
Adaptor5VDC
J3
Adaptor5VDC
12
43
5
RESET1
SW_PUSHBUTTON_5PIN
RESET1
SW_PUSHBUTTON_5PIN
12
R97
301
R97
301
C41
0.1uF
C41
0.1uF
D9
MBRS2040LT3
D9
MBRS2040LT3
1 2
R66
301
R66
301
1
2
R78
100k
R78
100k
1 2
R81
10k
R81
10k
Schematics and Layout www.ti.com
Figure 9. CDCE421AEVM—Schematic
12 10.9-MHz to 1.175-GHz, Low Phase Noise Clock Evaluation Board SCAU031 – June 2009
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