Datasheet

MAX31855 Evaluation Kit
Evaluates: MAX31855
7Maxim Integrated
Figure 3. MAX31855 EV Kit Schematic (Sheet 2 of 2)
MCLR
1
P3 HB
2
COM_LED/BOOT
3
P1
4
P2
5
RCV
6
P6/CS
7
GND
8
OCS1
9
OSC2
10
P4
11
UOE
12
PS_VAR
13
Vusb
14
D-/VM
15
D+/VP
16
ENUM
17
P9/SDO
18
GND
19
VDD
20
P11/SDA/SDI
21
P10/SCL/SCK
22
VMO
23
VPO
24
USB_DET
25
P5
26
P7/1W_DQ
27
P8/1W_PU
28
MC
L
R
P
3
H
B
CO
M
_
L
ED/BOO
T
P
1
P
2
RC
V
P
6
/
C
S
GN
D
OCS
1
OSC
2
P
4
UO
E
P
S
_
VA
R
V
us
b
D
-
/
V
M
D
+
/V
P
EN
U
M
P
9/
SD
O
GN
D
VD
D
P
1
1/SDA/SD
I
P
10
/
SC
L
/
SC
K
VM
O
V
P
O
US
B
_D
E
T
P
5
P7
/
1W
_
D
Q
P
8
/1
W
_
P
U
SOIC 28-pin
U5
PIC18LF2550
Vbus
1
D-
2
D+
3
I.D.
4
GND
5
J1 USB_5PIN
OUT
1
GND
2
FLAG
3
ON
4
IN
5
MAX4787EXK+TCT-ND
SC70-5
U7
24.9 R1 24.9
R2
24.9 R3
SO SCK
CS
0
R13
0 R14 0 R15
0.1uF
C9
0.1uF C10
330 R16
1206 D1 Fault LED
GND
GND GND
D+ D-
D- D+
330
R6
1M R10
4.7K R8
22pF C15
22pF C16
20MHz
CRYSTAL_SM
X1
GND
GND
GND
VBUS
SHDN
1
GND
2
IN
3
OUT
4
BP
5
SOT23-5 U6 MAX8868EUK33-T
1uF C11
1uF C12
0.01uF C13
GND GND
5VDD
3V3
3V3
3V3
N
OTE: All R, C and L footprints are 0805 unless
otherwise stated.
4.7K R4
DNP R5
DNP C14
GND
3V3
BOOTLOAD
3-Wire interface (Read Only)
PCB notes: D1, D2, R5 and R9 must be on top layer.
R9
DNP
GND
Reset
1uF C17
GND
4.7K R12
3V3
Select Fixed Voltage
GND
1
LED_BI-COLOR
D2
330
R7
RED
GREEN
1
D
2
R
E
D
G
R
E
E
N
D
N
1.0uF C18
0.1uF C19
0 R11