Mechanical Dimensions

Notes:

The WM2000 incorporates a jumper resistor that can be installed vertically (lengthwise) or horizontally. If it is installed vertically, the module will use the onboard chip antenna — this is the default "WM2000C" configuration. If the resistor is installed horizontally, then the module will use the U.FL antenna connector ("WM2000U" configuration).

If the WM2000 is surface-mounted on the host board, special care is required to ensure the optimal operation of the onboard antenna. The two possible choices are:

• Have the entire "narrowed" portion of the module hang off the edge of the host PCB. In other words, ideally, only the length of the module labeled L1 should rest on top of the host board.
• Alternatively, keep the host board area located directly under the module's chip antenna free of any components or PCB traces. A "keep-out" area of approximately 15mm x 10mm is recommended.

L

Max.

45.1

Module length (mm)

L1

Max.

31.75

Module length (mm) not including the "narrowed" chip antenna/LED area

W

Max.

28.15

Module width (mm)

W1

Max.

21.5

Width of the "narrowed" chip antenna/LED area (mm)

H

Max.

3.5

Module height (mm)

p

Avg.

2.54

Pin pitch (mm)

d

Max.

1.85

Offset (mm) from the center of the bottom-most pin to the bottom edge of the module

K1

Max.

15

Keep-out area height (mm)

K2

Max.

10

Keep-out area width (mm)