CUI DEVICES | MODEL: SD4-4-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

CONNECTOR

PIN#

SD CARD

PIN#

SD MODE

UHS-II MODE

SIGNAL

NAME

TYPE

DESCRIPTION

SIGNAL

NAME

TYPE

DESCRIPTION

P1

10

-

-

NOT USED

VSS3

S

SUPPLY VOLTAGE GROUND

P2

9

DAT2

I/O/PP

DATA LINE (BIT 2)

-

-

NOT USED

P3

11

-

-

NOT USED

D0+

LVDS

D0+

P4

1

CD/DAT3

I/O/PP

CARD DETECT/DATA LINE (BIT 3)

-

-

NOT USED

P5

12

-

-

NOT USED

DO-

LVDS

D0-

P6

2

CMD

PP

COMMAND/RESPONSE

-

-

NOT USED

P7

CD

CD

-

CARD DETECT SWITCH

CD

-

CARD DETECT SWITCH

P8

3

VSS1

S

SUPPLY VOLTAGE GROUND

VSS1

S

SUPPLY VOLTAGE GROUND

P9

13

-

-

NOT USED

VSS4

S

SUPPLY VOLTAGE GROUND

P10

14

-

-

NOT USED

VDD2

S

SUPPLY VOLTAGE (1.8 V)

P11

4

VDD

S

SUPPLY VOLTAGE

VDD1

S

SUPPLY VOLTAGE (3.3 V)

P12

15

-

-

NOT USED

D1-

LVDS

D1-

P13

5

CLK

I

CLOCK

-

-

NOT USED

P14

16

-

-

NOT USED

D1+

LVDS

D1+

P15

6

VSS2

S

SUPPLY VOLTAGE GROUND

VSS2

S

SUPPLY VOLTAGE GROUND

P16

17

-

-

NOT USED

VSS5

S

SUPPLY VOLTAGE GROUND

P17

7

DAT0

I/O/PP

DATA LINE (BIT 0)

RCLK+

I

RCLK+

P18

8

DAT1

I/O/PP

DATA LINE (BIT 1)

RCLK-

I

RCLK-

P19

WP

WP

-

WRITE PROTECT

WP

-

WRITE PROTECT

GND

-

-

-

COVER GROUND

-

-

COVER GROUND

CARD STATUS

WITHOUT CARD

CARD INSERTED

P7

P8

P7

P8

WRITE PROTECTION

WRITE

PROTECTED

WRITE ENABLE

P19

GND P19

GND

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