Datasheet
Maxim Integrated
│
15
MAX31790 Evaluation Kit Evaluates: MAX31790
www.maximintegrated.com
Figure 5d. MAX31790 EV Kit Schematic (Sheet 4 of 4)
MCL R
1
P3,HB
2
COM_L ED,BOOT
3
P1
4
P2
5
RCV
6
P6, CS
7
GND
8
OSC1
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,SDI ,SDA
21
P10,SCK ,SCL
22
VMO
23
VP O
24
USB_DET
25
P5
26
P7,1W_DQ
27
P8,1W_PU
28
U5I
PICfor DS3900
Vbus
1
D-
2
D+
3
I.D.
4
GND
5
J1I
USB_5P IN
OUT
1
GND
2
FLAG
3
ON
4
IN
5
MAX4787EXK +TCT- ND
U1I
MAX4787
SHDN
1
GND
2
IN
3
OUT
4
BP
5
U2I
MAX8868EUK 33-T
D1I
LED
R1I330
R2I 24.9
R3I 24.9
R7I
330
R8I
330
R9I
2.2k
C5I
4.7uF
C13I
0.1uF
C12I
1.0uF
C2I
4.7uF
C1I
0.1uF
C3I
1.0uF
C14I
220nF
C4I
0.01uF
GNDGND
D-
D+
VBUS
GND
5V
GND
3.3V
RCV
1
VP O
2
MODE
3
VMO
4
OE
5
SUSP
6
VP I
7
VMI
8
ENUM
9
VCC
10
GND
11
D-
12
D+
13
VTRM
14
VL
15
USB_DET
16
RC
V
V
P
O
MO
D
E
VM
O
O
E
S
U
S
P
V
P
I
VM
I
E
NU
M
V
C
C
GN
D
D
-
D
+
V
T
R
M
V
L
U
S
B
_D
E
T
U3I
MAX3344E
VCCA
1
A0
2
A1
3
A2
4
A3
5
A4
6
A5
7
A6
8
A7
9
GND
10
OE
11
B7
12
B6
13
B5
14
B4
15
B3
16
B2
17
B1
18
B0
19
VCCB
20
V
CC
A
A
0
A
1
A
2
A
3
A
4
A
5
A
6
A
7
GN
D
O
E
B
7
B
6
B
5
B
4
B
3
B
2
B
1
B
0
V
CC
B
U4I
FXMA108
RCV 3V3
VP O 3V3
VMO 3V3
OE 3V3
VP I 3V3
VMI 3V3
USB_DET 3V3
D+
D-
ENUM 3V3
GND
3.3V
5V
C10I
1.0uF
C9I
1.0uF
C11I
0.1uF
GND
3.3V
VTRM
3.3V VCC
C6I
0.1uF
C7I
0.1uF
GND
ENUM 3V3
VMI 3V3
OE 3V3
VMO 3V3
VP O 3V3
RCV 3V3
USB_DET 3V3
VP I 3V3
USB_DET VDUT
RCV VDUT
VP O VDUT
VMO VDUT
OE VDUT
VP I VDUT
VMI VDUT
ENUM VDUT
R6I
10k
GND
GND
R4I
100k
R5I
10k
GND
GND
VCC
VCC OE VDUT
RCV VDUT
USB_DET VDUT
VP O VDUT
VMO VDUT
ENUM VDUT
VP I VDUT
VMI VDUT
VCC
GND
P7
P6
GND
SCL _PIC
SDA_PIC
R10I
4.7k
1
2
J4I
GND
VP P
COM
CL K 3V3
C8I0.01uF
3.3V
GND
CL K VDUT
VCC
CL K VDUT
INH
1
GND
2
OUT
3
VCC
4
I
N
H
GN
D
OU
T
V
C
C
X1I
OSC_CMOS_4pin
1
2
D3I
Green
D2I B
Red
D2I A
J3IJ2I
100mA current
limiting switch.
3.3V L inear Regulator,
150mA ma x
USB Transceiver. Converts
USB signals to logical
signals. The high level for
the logical signals is 3.3V.
48MHz Oscillator
8-Channel, Bi-Directional Le vel
T
ranslator. USB side has a xed 3.3V
reference. PIC side reference is the
varying VDUT reference.
Q1I
NMOS
USB-to-I2C Master