CUI DEVICES | MODEL: SD4-3-B | DESCRIPTION: SD 4.0 CARD CONNECTOR

date 10/26/2023 | page 3 of 5

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MECHANICAL DRAWING (CONTINUED)

units: mm

PCB tolerance: ±0.05 mm

Recommended PCB Layout

Top View

PIN CONNECTIONS

PIN#

SD MODE

UHS-II MODE

SIGNAL

NAME

TYPE

DESCRIPTION

SIGNAL

NAME

TYPE

DESCRIPTION

9

DAT2

I/O/PP

DATA LINE (BIT 2)

-

-

NOT USED

1

CD/DAT3

I/O/PP

CARD DETECT/DATA LINE (BIT 3)

-

-

NOT USED

2

CMD

PP

COMMAND/RESPONSE

-

-

NOT USED

3

VSS1

S

SUPPLY VOLTAGE GROUND

VSS1

S

SUPPLY VOLTAGE GROUND

4

VDD

S

SUPPLY VOLTAGE

VDD1

S

SUPPLY VOLTAGE (3.3 V)

5

CLK

I

CLOCK

-

-

NOT USED

CD

CD

-

CARD DETECT SWITCH

CD

-

CARD DETECT SWITCH

6

VSS2

S

SUPPLY VOLTAGE GROUND

VSS2

S

SUPPLY VOLTAGE GROUND

7

DAT0

I/O/PP

DATA LINE (BIT 0)

RCLK+

I

RCLK+

8

DAT1

I/O/PP

DATA LINE (BIT 1)

RCLK-

I

RCLK-

WP

WP

-

WRITE PROTECT

WP

-

WRITE PROTECT

10

-

-

NOT USED

VSS3

S

SUPPLY VOLTAGE GROUND

11

-

-

NOT USED

D0+

LVDS

D0+

12

-

-

NOT USED

DO-

LVDS

D0-

13

-

-

NOT USED

VSS4

S

SUPPLY VOLTAGE GROUND

14

-

-

NOT USED

VDD2

S

SUPPLY VOLTAGE (1.8 V)

15

-

-

NOT USED

D1-

LVDS

D1-

16

-

-

NOT USED

D1+

LVDS

D1+

17

-

-

NOT USED

VSS5

S

SUPPLY VOLTAGE GROUND

GND

-

-

COVER GROUND

-

-

COVER GROUND

WP

#6

CD

#6

WP

#6

CD

#6

WP

#6

CD

#6

CARD STATUS

WITHOUT CARD

CARD INSERTED

WRITE PROTECT

LOCK

CARD INSERTED

WRITE PROTECT

UNLOCK

Additional Resources: Product Page | 3D Model | PCB Footprint