Datasheet

Evaluates: SPI and SMBus/I
2
C-Compatible Parts
CMAXQUSB User’s Guide
9
USBVCC
4
U1P71
25
6
30 3 26 13
8 7 5
TXD
U1P70
24
RXD
U1P52
23
RTS
U1P65
22
CTS
U1P53
21
DTR
U1P64
20
DSR
19
DCD
18
RI
16
TXDEN
12
TXLED
11
RXLED
15
PWREN
10
SLEEP
14
PWRCTL
EEDATA
2
32
1
VDDIO
C15 0.1µF
C12
0.1µF
R7
470Ω
R12
27Ω
R13
27Ω
R2
1.5kΩ
C5
0.033µF
C14 0.1µF
C13 0.1µF
R14 10kΩ
R1
2.2kΩ
USBVCC
RESET USBDM USBDP RSTOUT
3V3OUT
27 31
C6
22pF
XTIN
28
C7
22pF
Y2 6MHz
C16 0.1µF
XTOUT EECS EESK
AVVC VCC VCC VCCIO
EEDATA TEST
2
CLK
6 7
VCC
NC NC
EEDATA
3
DI
1
CS
4
D0
8
USBVCC
U4
93C46
U2
FT232BM
P2-3 P2-2 P2-1
P2
USB SERIES B
P2-4
MAX8511
U11
+5V
C17
1µF
+3.3V
C2 22µF
5 2
1 3
OUT
GND
IN SHDN
U3
MAX8511
+5V
C18
1µF
+2.5V VDDIO
C19 1µF
5 2
1 3
OUT
GND
IN SHDN
GND
17
GND
9
AGND
29
GND
5
R19 100kΩ
R18 4.7kΩ
+5V
C4 4.7µF
7 6 5
43
1 2 8
OUT OUT
GND
ON/OFF
SET
IN IN
FAULT
C3
22µF
J3
SW1
J2
VDDIO
C10 0.1µF
C11 0.1µF
VDDIO
VDD
U9
MAX3373
P3-3
P3-7I/OV
CC
2 I/OV
CC
1
V
CC
TRI-STATE
U1P61
U1P60
GND V
L
I/OV
L
2 I/OV
L
1
1 2 45
6 7 8
12 43
3
JU3
VDD
R6 1.5kΩ
R5
1.5kΩ
MAX890
Figure 1b. CMAXQUSB Schematic (Sheet 2 of 4)