LFXO Crystal
If the CSB04PA1x module will be used for Bluetooth communication in a battery-powered device, MMB recommends the addition of an external LFXO crystal to enable operation in various sleep modes.
Connection Diagram
Supported Part Numbers
The following external crystal part numbers are compatible with the CSB04PA1x module.
| Mfg. Part Number | Vendor | Load cap | Package |
|---|---|---|---|
| CM2012H32768DZFT | Citizen Finedevice Co. | 12.5 pF | 2.0 x 1.2 mm |
| TFE202P32K7680R | CTS | 12.5 pF | 2.0 x 1.2 mm |
| FX135A-327 | Fox Electronics | 12.5 pF | 3.2 x 1.5 mm |
| G83270021 | Diodes Inc. | 12.5 pF | 3.2 x 1.5 mm |
| ECS-.327-12.5-34B-TR | ECS Inc. | 12.5 pF | 3.2 x 1.5 mm |
Other Part Numbers
Other external crystals may be supported if their specifications match the ones shown in the table below.
| Parameter | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Frequency | f | 32.768 | kHz | ||
| Equivalent series resistance (ESR) | ESR | 70 | kΩ | ||
| Load capacitance | CL | 12.5 | pF | ||
| Frequency tolerance | Ft | -20 | +20 | ppm |
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