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General Description

The MAX4948 evaluation kit (EV kit) evaluates the

MAX4948 hex single-pole/double-throw (SPDT) data

switch. The EV kit utilizes the MAX4948 in a Secure

Digital (SD) card application. The EV kit provides two

SD card sockets and a single SD card printed-circuit

board (PCB) plug. The supply voltage provided by the

host interface powers the MAX4948 IC and any con-

nected SD memory cards.

The MAX4948 EV kit is a customized PCB with an SD

plug designed into the board. The PCB plug is

designed to resemble an SD memory card’s mechani-

cal dimensions. The PCB plug measures 50.8mm x

24mm x 1.4mm. The mechanical specifications of an

actual SD memory card can be obtained from the SD

Card Association.

Features

♦ Powered by Host Interface

♦ Customized PCB

♦ SD PCB Plug (1.4mm Thickness)

♦ On-Board SD Card Sockets (P1, P2)

♦ On-Board Power Indicator (LED1)

Evaluates: MAX4948

MAX4948 Evaluation Kit

________________________________________________________________

Maxim Integrated Products

19-0991; Rev 0; 10/07

Component List

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.

Ordering Information

DESIGNATION QTY DESCRIPTION

C1 1

1µF ±10%, 10V X5R ceramic

capacitor (0603)

Murata GRM188R61A105K

TDK C1608X5R1A105K

C2 0

Not installed, ceramic capacitor

(0603)

C3, C4 2

0.1µF ±10%, 50V X5R ceramic

capacitors (0603)

Murata GRM188R71H104K

TDK C1608X7R1H104K

J1 1

24-pin, dual-row (2 x 12) vertical

header (0.1in centers)

DESIGNATION QTY DESCRIPTION

J2 1

16-pin, dual-row (2 x 8) vertical

header (0.1in centers)

JU1, JU2 2 3-pin headers (0.1in centers)

LED1 1 Green surface-mount LED (0603)

P1, P2 2 SD memory card socket (SMD)

R1–R18 0

Not installed, resistors—short (PC

trace) (0402)

R19 1 430Ω ±5% resistor (0603)

TP1, TP2 2 Multipurpose test points

U1 1

Maxim Hex SPDT data switch

MAX4948ETG+ (24-pin TQFN-EP)

— 22 Shunts

— 1 PCB: MAX4948 Evaluation Kit+

PART TYPE

MAX4948EVKIT+ EV Kit

Denotes lead-free and RoHS-compliant.

Summary of content (10 pages)

PAGE 1
9-0991; Rev 0; 10/07 MAX4948 Evaluation Kit The MAX4948 evaluation kit (EV kit) evaluates the MAX4948 hex single-pole/double-throw (SPDT) data switch. The EV kit utilizes the MAX4948 in a Secure Digital (SD) card application. The EV kit provides two SD card sockets and a single SD card printed-circuit board (PCB) plug. The supply voltage provided by the host interface powers the MAX4948 IC and any connected SD memory cards. The MAX4948 EV kit is a customized PCB with an SD plug designed into the board.
PAGE 2
Evaluates: MAX4948 MAX4948 Evaluation Kit Component Suppliers SUPPLIER PHONE WEBSITE Murata Mfg. Co., Ltd. 770-436-1300 www.murata.com TDK Corp. 847-803-6100 www.component.tdk.com Note: Indicate that you are using the MAX4948 when contacting these component suppliers.
PAGE 3
MAX4948 Evaluation Kit Evaluates: MAX4948 LOGIC P1DAT2 NO1 NC1 P1DAT3 NO2 NC2 P1CMD P1 SD CARD SOCKET P1CLK P1DAT0 P1DAT1 COM3 P3CMD COM4 P3CLK COM5 P3DAT20 COM6 P3DAT1 P3 SD CARD PLUG (PCB PLUG) S5 NO6 NC6 P3DAT3 S4 NO5 NC5 COM2 S3 NO4 NC4 P3DAT2 S2 NO3 NC3 COM1 S1 S6 MAX4948 P2DAT2 P2DAT3 *ASSUMING SHUNTS ARE INSTALLED BETWEEN EACH HORIZONTALLY ADJACENT PIN (EVEN-TO-ODD) ON HEADERS J1 AND J2. P2CMD P2 SD CARD SOCKET P2CLK P2DAT0 P2DAT1 Figure 1.
PAGE 4
Evaluates: MAX4948 MAX4948 Evaluation Kit SD Sockets Header J2 The two on-board SD card sockets accommodate both a standard SD memory card and a thin SD memory card. The pinout for each SD socket is listed in Table 3. The 16-pin, dual-row header (J2) connects the COM1–COM6 terminals to the PCB plug (P3). In addition, the VDD supply voltage from the SD card reader/SD card port is routed through J2 to each VCC pin of socket P1 and P2.
PAGE 5
MAX4948 Evaluation Kit 8 DAT0 7 GND 6 CLK 5 VDD 4 GND 3 CMD 2 DAT3 1 DAT2 Evaluates: MAX4948 DAT1 9 Figure 2. PCB Plug (P3) Pinout 86.4mm 50.8mm 31.2mm 86.4mm 24mm 5.7mm 1.4mm 31.2mm Figure 3.
PAGE 6
Evaluates: MAX4948 MAX4948 Evaluation Kit R6 SHORT (PC TRACE) P1 SD CARD SOCKET P1-8 R5 SHORT (PC TRACE) P1-7 TP1 P1-6 VDD C2 OPEN VCC 21 GND 6 GND C1 1μF P1-5 P1-4 P1DAT1 P1DAT0 P1-3 P1CLK P1CMD P1-2 P1DAT3 R3 SHORT (PC TRACE) P1DAT2 J1-1 J1-2 J1-5 J1-6 J1-9 J1-10 J1-13 J1-14 J1-19 J1-20 J1-23 J1-24 J1-3 J1-4 24 2 8 10 17 19 COM2 P2DAT1 R2 SHORT (PC TRACE) P2DAT0 P2CLK P1-9 P2CMD R1 SHORT (PC TRACE) R12 SHORT (PC TRACE) P2 SD CARD SOCKET P2DAT3 P2DAT2 J1-8 J1-11
PAGE 7
MAX4948 Evaluation Kit Evaluates: MAX4948 Figure 5.
PAGE 8
Evaluates: MAX4948 MAX4948 Evaluation Kit Figure 6.
PAGE 9
MAX4948 Evaluation Kit Evaluates: MAX4948 Figure 7.
PAGE 10
Evaluates: MAX4948 MAX4948 Evaluation Kit Figure 8. MAX4948 EV Kit Component Placement Guide—Solder 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.