Evaluates: MAX5474/MAX5475
MAX5474 Evaluation Kit
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
19-1034; Rev 0; 11/07
General Description
The MAX5474 evaluation kit (EV kit) is an assembled
and tested printed-circuit board (PCB) that evaluates
the MAX5474 IC. The MAX5474 is a 32-tap, 50kΩnon-
volatile, linear-taper digital potentiometer. Windows®
2000/XP/Vista-compatible software is available to pro-
vide a convenient user interface for exercising the
MAX5474 features.
The MAX5474 EV kit provides three options to control
the MAX5474 wiper position using logic-input signals.
The MAX5474 logic-input signals can be controlled by
an on-board USB interface circuit, PCB interfacing
pads, or switches on the EV kit circuit for stand-alone
operation.
The EV kit can operate from a 3.3V source generated
from the USB interface circuit or from a 2.7V to 5.25V
external DC power supply. The EV kit can also evaluate
the MAX5475 (100kΩ) after IC replacement (U1).
Features
♦2.7V to 5.25V Single-Supply Operation
♦Power-On Recall of Wiper Position from
Nonvolatile Memory
♦On-Board USB Interface Circuit
♦USB Powered
♦USB-PC Connection (Cable Included)
♦Stand-Alone Operation Using On-Board Switches
♦PCB Pads for User-Supplied Microcontroller
Interface Signals
♦PCB Pads for Potentiometer Signals (L, W, H)
♦Proven USB-Compatible PCB Layout
♦Evaluates the MAX5474/MAX5475 in 8-Pin SOT23
Package
♦Windows 2000/XP/Vista (32-Bit)-Compatible
Software
♦Fully Assembled and Tested
Component List
Ordering Information
PART TYPE
MAX5474EVKIT+ EV Kit
DESIGNATION QTY DESCRIPTION
C1, C3–C10,
C17, C21–C26 16
0.1µF ±10%, 16V X7R ceramic
capacitors (0603)
Murata GRM188R71C104K
TDK C1608X7R1C104K
C2, C13, C15 3
10µF ±20%, 6.3V X5R ceramic
capacitors (0805)
Murata GRM21BR60J106M
TDK C2012X5R0J106M
C11, C12 2
10pF ±5%, 50V C0G ceramic
capacitors (0603)
Murata GRM1885C1H100J
TDK C1608C0G1H100J
C14, C16, C27 3
1µF ±10%, 10V X5R ceramic
capacitors (0603)
Murata GRM188R61A105K
TDK C1608X5R1A105K
DESIGNATION QTY DESCRIPTION
C18, C19 2
22pF ±5%, 50V C0G ceramic
capacitors (0603)
Murata GRM1885C1H220J
TDK C1608C0G1H220J
C20 1
3300pF ±10%, 50V X7R ceramic
capacitor (0603)
Murata GRM188R71H332K
TDK C1608X7R1H332K
D1 1 Green LED (0603)
Panasonic LNJ314G8TRA
FB1 0 Not installed, ferrite-bead
inductor—short (PC trace) (0603)
H1 0 Not installed, dual-row 10-pin (2 x 5)
header
J1 0 Not installed, dual-row 10-pin (2 x 5)
header—short
JU1 1 3-pin header
JU2, JU3, JU4 3 3-way, 4-pin headers
+
Denotes lead-free and RoHS-compliant.
Windows is a registered trademark of Microsoft Corp.
Evaluates: MAX5474/MAX5475
MAX5474 Evaluation Kit
2 _______________________________________________________________________________________
Component Suppliers
SUPPLIER PHONE WEBSITE
Murata Mfg. Co.,
Ltd. 770-436-1300 www.murata.com
Panasonic Corp. 800-344-2112 www.panasonic.com
TDK Corp. 847-803-6100 www.component.tdk.com
Note: Indicate that you are using the MAX5474 when contacting
these component suppliers.
Component List (continued)
DESIGNATION QTY DESCRIPTION
JU5, JU6 2 2-pin headers
P1 1 USB type-B right-angle male
receptacle
R1 1 0Ω ±5% resistor (0603)
R2 1 220Ω ±5% resistor (0603)
R3 1 10kΩ ±5% resistor (0603)
R4 1 2.2kΩ ±5% resistor (0603)
R5 1 1.5kΩ ±5% resistor (0603)
R6, R7 2 27Ω ±5% resistors (0603)
R8 0 Not installed, resistor (0402)
R9, R10 2 100kΩ ±5% resistors (0603)
R11 1 51kΩ ±5% resistor (0603)
SW1, SW2 2 Single-pole/double-throw (SPDT)
slide switches
SW3 1 Momentary pushbutton switch
U1 1
Maxim 32-tap, 50kΩ nonvolatile,
linear-taper digital potentiometer
MAX5474EKA+T (8-pin SOT23)
U2 1
Maxim microcontroller
Maxim MAXQ2000-RAX+ (68-pin
QFN-EP, 10mm x 10mm)
DESIGNATION QTY DESCRIPTION
U3 1
93C46 type 3-wire EEPROM (8-pin
SO), 16-bit architecture
Atmel AT93C46A-10SU-2.7
U4 1
UART-to-USB converter (TQFP-32L,
7mm x 7mm)
FTDI FT232BL
U5 1 Maxim 3.3V regulator
MAX8511EXK33+T (5-pin SC70)
U6 1 Maxim 2.5V regulator
MAX8511EXK25+T (5-pin SC70)
U7, U8 2
Maxim low-voltage logic-level
translators
MAX3374EEKA+T (8-pin SOT23)
U9 1 Maxim CMOS switch debouncer
MAX6816EUS+T (4-pin SOT143)
Y1 1 16MHz crystal
Citizen HCM49-16.000MABJ-UT
Y2 1 6MHz crystal
Citizen HCM49-6.000MABJ-UT
— 6 Shunts
— 1 USB high-speed A-to-B cable, 6ft
— 1 PCB: MAX5474 Evaluation Kit+
MAX5474 EV Kit Software Files
FILE DESCRIPTION
INSTALL.EXE Installs the EV kit files on the
computer
MAX5474.EXE Application program
USB_Driver_Help.PDF USB driver installation help file
FTD2XX.INF USB driver file
UNINST.INI Uninstalls the EV kit software
Quick Start
Recommended Equipment
Before beginning, the following equipment is needed:
•Maxim MAX5474 EV kit (USB cable included)
•User-supplied Windows 2000/XP/Vista-compatible
PC with a spare USB port
•One ohmmeter
Note: In the following sections, software-related items
are identified by bolding. Text in bold refers to items
directly from the EV kit software. Text in bold and
underlined refers to items from the Windows operating
system.
Procedure
The EV kit is fully assembled and tested. Follow the
steps below to verify board operation. Caution: Do not
turn on the power supply until all connections are
completed.
1) Visit www.maxim-ic.com/evkitsoftware to download
the latest version of the EV kit software,
5474Rxx.ZIP. Save the EV kit software to a tempo-
rary folder and uncompress the ZIP file.
2) Install the EV kit software on the computer by run-
ning the INSTALL.EXE program inside the tempo-
rary folder. The program files are copied and icons
are created in the Windows Start | Programs
menu.
3) Verify that a shunt is installed on pins 1-2 of jumper
JU1. This configures the MAX5474 IC’s VDD to 3.3V
from the USB interface circuit.
4) Verify that a shunt is installed on pins 1-3 of
jumpers JU2, JU3, and JU4. This configures the
logic-input pins to receive signals from the USB
interface circuit.
5) Verify that no shunt is installed on jumpers JU5 and
JU6, the L PCB pad is not connected to GND, and
the H PCB pad is not connected to the W PCB pad.
6) Connect the ohmmeter across the W and L PCB
pads.
7) Connect the USB cable from the PC to the
MAX5474 EV kit. A Building Driver Database win-
dow pops up in addition to a New Hardware
Found message when installing the USB driver for
the first time. If a window similar to the one
described above does not appear after 30s,
remove the USB cable from the board and recon-
nect it. Administrator privileges are required to
install the USB device driver on Windows
2000/XP/Vista.
8) Follow the directions of the Add New Hardware
Wizard to install the USB device driver. Choose the
Search for the best driver for your device option.
Specify the location of the device driver to be
C:\Program Files\MAX5474 (default installation
directory) using the Browse button. During device
driver installation, Windows may show a warning
message indicating that the device driver Maxim
uses does not contain a digital signature. This is not
an error condition and it is safe to proceed with
installation. Refer to the USB_Driver_Help.PDF doc-
ument for additional information.
9) Start the MAX5474 EV kit software by opening its
icon in the Start | Programs menu.
10) The software automatically searches for the
MAX5474. After successful connection, the EV kit soft-
ware main window appears in the upper-left corner of
the window. Select the Up/Down buttons to change
the wiper position, or enter the desired wiper position
into the Wiper Input combo box (see Figure 1).
See the
Detailed Description of Software
section for
more information on the software features.
Evaluates: MAX5474/MAX5475
MAX5474 Evaluation Kit
_______________________________________________________________________________________ 3
Figure 1. MAX5474 Evaluation Kit Software Main Window
Evaluates: MAX5474/MAX5475
Detailed Description of Hardware
The MAX5474 EV kit demonstrates the MAX5474, a 32-
tap, 50kΩnonvolatile, linear-taper digital potentiometer
IC’s features. The EV kit uses a MAX5474 IC in an 8-pin
SOT23 package on a proven two-layer PCB design. The
MAX5474 EV kit provides two options to power the
MAX5474 IC. It can operate from the 3.3V supply gener-
ated from the USB interface circuit, or from a user-sup-
plied 2.7V to 5.25V external DC power supply. The USB
interface circuit features MAX3374 low-voltage logic-
level translators (U7 and U8) for 2.7V to 5.25V operation.
Nonvolatile Memory
Programming Nonvolatile (NV) Memory in Stand-
Alone Operation
In stand-alone operation, the MAX5474 wiper position
is stored in nonvolatile memory whenever the SPDT
slide switch SW1 (CS) is moved from EN to DIS (rising
edge) and the pushbutton switch SW3 (INC) is not
depressed (high). The wiper returns to this stored posi-
tion upon power-up.
Software Operation
In software operation, the MAX5474 wiper position is
stored in nonvolatile memory when the Store button is
pressed. The MAX5474 wiper returns to this position
upon power-up. After powering up the EV kit, before
changing the wiper position from the nonvolatile memo-
ry position, press the Reset button to reinitialize the
wiper to a known position (midscale). Reset does not
overwrite the MAX5474 nonvolatile memory; press the
Factory Default button to reset the NV memory to the
factory-preset position (midscale). See the
Detailed
Description of Software
section for more information.
Jumper and Switch Functions
Using an External DC Power Supply
The MAX5474 EV kit can be powered by an external
2.7V to 5.25V DC power supply. To connect the EV kit
to an external power supply, disconnect the USB cable
and install a shunt on pins 2-3 of jumper JU1. Turn off
the power supply and connect the power-supply
ground terminal to the EV kit GND pad and the power-
supply positive terminal to the VIN pad. Table 1 lists the
various options for powering the MAX5474 EV kit.
Interface Control Signals
The MAX5474 EV kit circuit features three logic-input
signals to control the MAX5474 wiper position. The
chip-select (CS), up/down (U/D), and increment (INC)
interface signals are controlled by the on-board USB
interface circuit or the PCB pads, along with user-sup-
plied external control signals, or stand-alone operation
using switches on the EV kit. Jumpers JU2, JU3, and
JU4 select the interface-signal-control sources for the
MAX5474 IC. Table 2 lists the various options for con-
figuring logic-input signal controls.
MAX5474 Evaluation Kit
4 _______________________________________________________________________________________
SHUNT
POSITION
INTERFACE CONTROL
SIGNALS CONNECTED TO INTERFACE SIGNALS CONTROLLED BY
1-2 PCB pads User-supplied external signals (EV kit software not updated)
1-3* USB interface circuit USB interface circuit and EV kit software
1-4 Switches
S tand - al one op er ati on, sw i tches S W 1, S W 2, S W 3 ( E V ki t softw ar e not up d ated ) :
• SW1 controls the CS signal
• SW2 controls the U/D signal
• SW3 controls the INC signal
Open No connect Do not use this configuration
Table 2. JU2, JU3, JU4 Jumper Functions (CS, U/D, INC)
*
Default position.
SHUNT
POSITION
VDD PIN
CONNECTED TO
EV KIT POWERED
FROM
1-2* 3.3V USB interface circuit
Open No connect Do not use (EV kit will not
be powered)
2-3 VIN External power supply
Table 1. JU1 Jumper Functions (VDD)
*
Default position.
Evaluates: MAX5474/MAX5475
MAX5474 Evaluation Kit
_______________________________________________________________________________________ 5
The stand-alone-operation switches can be used to
store the MAX5474 wiper position into nonvolatile mem-
ory. To store the MAX5474 wiper position into non-
volatile memory, set the wiper to the desired position
and slide the SPDT switch SW1 (CS) from EN to DIS
(rising edge), while pushbutton switch SW3 (INC) is not
depressed (high). The wiper returns to this stored posi-
tion upon power-up.
Voltage-Divider with Ground Reference
The MAX5474 EV kit provides an option to configure
the MAX5474 as a voltage-divider referenced to ground
(GND). To configure the EV kit as a voltage-divider ref-
erenced to ground, connect the L PCB pad to GND
using jumper JU5, connect the voltage source to the H
PCB pad, and the application input signal to the W PCB
pad. Jumper JU5 connects or disconnects the L signal
from GND. Table 3 lists the JU5 jumper options.
Variable Resistor or Potentiometer
The MAX5474 EV kit configures the MAX5474 as a
potentiometer by default. The EV kit provides an option
to reconfigure the MAX5474 as a variable resistor by
connecting the MAX5474 IC’s H and W pins. To recon-
figure the MAX5474 as a variable resistor, install a shunt
on jumper JU6. Table 4 lists the JU6 jumper options.
Stand-Alone Operation Switches (SW1, SW2, SW3)
The MAX5474 EV kit features three switches to control
the MAX5474 interface signals for stand-alone opera-
tion. SPDT slide switches SW1 and SW2 control the CS
and U/Dsignals, respectively, and pushbutton switch
SW3 controls the INC signal. The CS, U/D, and INC sig-
nals interact to control the wiper position of the
MAX5474. Table 5 lists the functions of switches SW1,
SW2, and SW3 for stand-alone operation. Refer to the
Truth Table
in the MAX5474 IC data sheet for specific
switch sequence.
Note: For stand-alone operation:
1) To power the EV kit, connect an external power
supply to VIN and GND and install a shunt on pins
2-3 of jumper JU1 (see Table 1).
2) To utilize the switches, install a shunt across pins 1-
4 of jumpers JU2, JU3, and JU4 (see Table 2).
Evaluating the MAX5475
The MAX5475 is similar to the MAX5474, but has an
end-to-end resistance of 100kΩ. To evaluate the
MAX5475, order a free sample of the MAX5475 and
replace IC U1. The software is compatible with the
MAX5475 IC.
SHUNT
POSITION
L PIN
CONNECTED TO EV KIT FUNCTIONS
Not installed* L PCB pad Potentiometer or
variable resistor
Installed GND Voltage-divider with
ground reference
Table 3. JU5 Jumper Functions (L Signal
and GND)
*
Default position.
SHUNT
POSITION H AND W PINS EV KIT FUNCTIONS
Not installed* Not connected Potentiometer
Installed Connected Variable resistor
Table 4. JU6 Jumper Functions
(H and W pins)
*
Default position.
SWITCH LOGIC-
INPUT PINS LOGIC-INPUT PINS FUNCTION
SW1 CS High = U1 disabled
Low = U1 enabled
SW2 U/DHigh = Increment up
Low = Decrement down
SW3 INC
Increment if: CS = low, U/D = high,
and INC = ↓
Decrement if: CS = low, U/D = low,
and INC = ↓
Table 5. Stand-Alone Operation for SW1,
SW2, SW3 Switch Functions (CS, U/D,
INC Signals)
↓=
High-to-low transition.
Evaluates: MAX5474/MAX5475
Detailed Description of Software
The MAX5474 EV kit software graphical user interface
(GUI) is a Windows program that provides a convenient
means to control the MAX5474, as shown in Figure 1.
Text in bold denotes user-selectable features in the
MAX5474 EV kit software. A mouse or the keyboard’s
TAB key is used to navigate various items on the main
window. The bottom left-side status bar of the main win-
dow provides the USB interface circuit communication
status. The bottom right-side status bar indicates the
presence or absence of the MAX5474 IC and opera-
tional status.
Software Startup
Upon starting the program, the MAX5474 EV kit soft-
ware automatically detects for the USB and interface
circuit connection. The MAX5474 EV kit enters normal
operating mode when the USB connection is detected.
The software Wiper Position and Wiper Input are ini-
tialized to midscale position at startup. Software initial-
ization sets the volatile register of the MAX5474 IC to
midscale. The NV memory remains unchanged. If the
USB connection is not detected, the software prompts
the user to retry, exit the program, or enter the demo
mode.
Demo Mode
The MAX5474 EV kit software can enter the demo
mode, when the USB connection is not detected, by
pressing the Cancel button in the MAX5474
Evaluation
Kit Interface Circuit Popup Window
(Figure 2). The soft-
ware can also enter the demo mode at any time using
the Options | Demo Mode pulldown menu item in the
software main window. When in demo mode, all soft-
ware communication to the EV kit circuit is disabled;
however, most of the software GUI is functional. Demo
mode allows the user to evaluate the software without
hardware connectivity. To exit demo mode, select
Options | Demo Mode again from the pulldown menu.
Note: When reentering normal operating mode from the
demo mode, the MAX5474 wiper position must be
reset. Reset the wiper by pressing the Reset button.
See the
Nonvolatile Memory
section for more details.
Wiper Position
Moving the Wiper Position track bar will update and
display the MAX5474 wiper position. Pressing the
Store button stores the MAX5474 wiper to the non-
volatile memory. Pressing the Reset button synchro-
nizes the software and wiper position by returning the
MAX5474 wiper to the midscale position.
The Wiper Input combo box accepts and displays a
number between 1 and 32 for the wiper input. The
Wiper Input also features a drop-down menu that
stores the last four user entries. After pressing the
Store button, the Wiper Stored edit box displays the
MAX5474 IC’s stored wiper position, and is read only.
Up and Down
Pressing the Up button increments the wiper one tap
position, while pressing the Down button decrements
the wiper one tap position. These buttons also move
the Wiper Position track bar to the respective position.
Nonvolatile Memory
The MAX5474 wiper position is stored in nonvolatile
memory when the Store button is pressed. The
MAX5474 wiper returns to this position upon power-up.
To demonstrate the nonvolatile memory feature in soft-
ware operation, press the Store button to store the
wiper position to the nonvolatile memory. Power cycle
the EV kit by removing the shunt from jumper JU1 and
reinstalling the shunt after 5s or longer (to allow dis-
charge of bypass capacitors).
Do not restart the soft-
ware.
Use an ohmmeter to verify the resistance
between the L and W PCB pads.
Perform a Reset to synchronize the software and
MAX5474 IC wiper position. Pressing the Reset button
does not overwrite the MAX5474 nonvolatile memory.
Factory Default
Pressing the Factory Default button resets the wiper
position in the MAX5474 volatile and nonvolatile memo-
ry to the factory-default position. The factory-default
wiper position in the volatile and nonvolatile memory is
at midscale.
MAX5474 Evaluation Kit
6 _______________________________________________________________________________________
Figure 2. MAX5474 Evaluation Kit Interface Circuit Popup Window
Keyboard Navigation
Press the TAB key to select each GUI control. The
selected control is indicated by a dotted outline. Using
SHIFT+TAB moves the selection to the previously
selected control. Buttons respond to the keyboard’s
SPACE bar. Some controls respond to the keyboard
UP and DOWN arrow keys. Activate the program’s
menu bar by pressing the F10 key, and then press the
letter of the desired menu item. Most menu items have
one letter underlined, indicating their shortcut key.
General Troubleshooting
Problem: Software reports it cannot find the inter-
face circuit.
•Is the interface circuit power LED lit?
•Is the USB cable connected?
•Has Windows plug-and-play detected the board?
Bring up Control Panel-->System-->Device Manager
and look at what device nodes are indicated for USB.
If there is an “unknown device” node attached to the
USB, delete it (this forces plug-and-play to try again).
•Are jumpers JU1–JU4 properly configured for USB
operation?
Evaluates: MAX5474/MAX5475
MAX5474 Evaluation Kit
_______________________________________________________________________________________ 7
Figure 3a. MAX5474 EV Kit Schematic (Sheet 1 of 2)
MAX5474
U1 GND
GND
CS
VIN
GND GND
JU1
JU2
CS
U/D
INC
U/D
INC
IN
VDD
VDD
VDD
+3.3V
JU5
JU6
L
W
H
L
U7_8
SW1
R9
100kΩ
C26
0.1μF
C25
0.1μF
W
H
8
7
6
2
1
2
3
1
1
2
2
3
3
4
JU3
VDD
VDD VDD
U7_1
U8_8
SW2
SW3
1, 2 3, 4
R10
100kΩ
R11
51kΩ
1
1
2
2
3
3
4
JU4
1
2
3
4
3
1
4
2
5
4
1
3
VCC
GND
OUT
MAX6818
U9
Evaluates: MAX5474/MAX5475
MAX5474 Evaluation Kit
8 _______________________________________________________________________________________
Figure 3b. MAX5474 EV Kit Schematic (Sheet 2 of 2)
SHIELD
SHIELD
6
5D+ 3
D-
C20
3300pF
C17
0.1μF
R5
1.5kΩ
R1
0Ω
Y2
6MHz
2
C1
0.1μF
GND 4
VBUS 1
P1
FB1
SHORT
(PC TRACE)
R7
27Ω
R4
2.2kΩ
C19
22pF
C5
0.1μF
C6
0.1μF
C7
0.1μF
C8
0.1μF
R6
27Ω
USB TYPE B
C2
10μF
C3
0.1μF
C4
0.1μF
+5V
D1 3
SK 2
C23
0.1μF
D0 4
CS 1
U3
AT93C46A
N.C.
7
ORG
6
GND
5
VCC
8
USBDM
8
USBDP
7
3V3OUT
6
RSTOUT
5
RESET
4
+5V
XTIN
27
C18
22pF
XTOUT
28
+5V
EECS
32
EESK
1
EEDATA
2
TEST
31
O VCC1 8
GND 2
O VCC2 1
VCC 7
I VL1
5
VL
3
I VL2
4
THREE-STATE
6
R3
10kΩ
+5V
R2
220Ω
D1
+3.3V
GND
9
AGND GND
1729
TXD 25 TXD
RXD 24 RXD
RTS 23 RTS
CTS 22 CTS
DTR 21 DTR
DSR 20 DSR
DCD 19 DCD
RI 18
RI
TXDEN 16
TXLED 12
RXLED 11
PWRCTL 14
PWREN 15
SLEEP 10
30 3 26 13
AVCC VCCVCC VCCIO
+5V
+5V +5V +3.3V
U4
FT232BL
U7
MAX3374E
RI
RTS
DTR
DSR
DCD
U7_8
U7_1
U2_59
U2_60
C27
1μF
VDD
+3.3V
C21
0.1μF
+3.3V
O VCC1 8
GND 2
O VCC2 1
VCC 7
I VL1
5
VL
3
I VL2
4
THREE-STATE
6
U8
MAX3374E
U8_8U2_61
C24
0.1μF
VDD
C22
0.1μF
C16
1μF
+3.3V
GND 2
OUT 5
SHDN
3
IN
1U5
MAX8511
C15
10μF
+3.3V+5V
H1
JTAG
H1-4
TCK H1-1
RESETH1-6TDO H1-3
H1-8TMS H1-5
H1-2H1-7
H1-10TDI H1-9
J1
J1-2
RESET
TDI
J1-1
J1-4TDO J1-3
J1-6TMS J1-5
J1-8J1-7
J1-10TCK J1-9
DSR
RXD
TXD
U2_61
U2_59
U2_60
CTS
HEADER 2X5
SHORT
C14
1μF
GND 2
OUT 5
SHDN
3
IN
1U6
MAX8511
C13
10μF
+2.5V+5V
VDD
49
SEG11/P1.3
1
SEG12/P1.4
2
SEG13/P1.5
3
SEG14/P1.6
4
SEG15/P1.7
5
SEG16/P2.0
6
SEG17/P2.1
7
SEG18/P2.2
8
SEG19/P2.3
9
SEG20/P2.4
10
SEG21/P2.5
11
SEG22/P2.6
12
SEG23/P2.7
13
SEG24/P3.0
14
SEG25/P3.1
15
SEG26/P3.2
16
SEG27/P3.3
17
GND
28
GND
42
VDDIO 27
HFXIN 51
HFXOUT 50
P6.5/T0/WKOUT 1 48
P6.4/T0B/WKOUT 0 47
P6.3/T2/OW_IN 46
P6.2/T2B/OW_OUT 45
P6.1/T1/INT13 44
P6.0/T1B/INT12 43
P5.7/MISO 41
P5.6/SCLK 40
P5.5/MOSI 39
P5.4/SS 38
P5.3/TX1/INT11 37
P5.2/RX1/INT10 36
32KIN 34
32KOUT 35
SEG10/P1.2
SEG9/P1.1
SEG8/P1.0
SEG7/P0.7/INT3
SEG6/P0.6/INT2
SEG5/P0.5/INT1
SEG4/P0.4/INT0
SEG3/P0.3
SEG2/P0.2
SEG1/P0.1
SEG0/P0.0
VADJ
VLCD2
VLCD1
VLCD
P7.1/RX0/INT15
P7.0/TX0/INT14
C9
0.1μF
+2.5V
68 67 66 65 64 63 62 61 60 59 58 57
TCK
TMS
TDI
56 55 54 53 52
+3.3V C10
0.1μF
R8
OPEN
Y1
6MHz
C11
10pF
C12
10pF
+3.3V
U2
MAXQ2000
18 19 20 21 22 23 24 29 30 31
RESET
TDO
32 3325 26
RESET
SEG28/P3.4/INT4
SEG29/P3.5/INT5
SEG30/P3.6/INT6
SEG31/P3.7/INT7
SEG32
SEG33/COM3
SEG34/COM2
SEG35/COM1
COM0
P4.0/TCK/INT8
P4.1/TDI/INT9
P4.2/TMS
P4.3/TDO
Evaluates: MAX5474/MAX5475
MAX5474 Evaluation Kit
_______________________________________________________________________________________ 9
Figure 4. MAX5474 EV Kit Component Placement Guide—Component Side
Evaluates: MAX5474/MAX5475
MAX5474 Evaluation Kit
10 ______________________________________________________________________________________
Figure 5. MAX5474 EV Kit PCB Layout—Component Side
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________
11
© 2007 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.
Evaluates: MAX5474/MAX5475
MAX5474 Evaluation Kit
CARDENAS
Figure 6. MAX5474 EV Kit PCB Layout—Solder Side
