PAN1326C2 / PAN1316C2🔗
The PAN1326C2 (ENW89823A5KF) is a Bluetooth® module based on the Texas Instruments CC2564C single-chip controller.
The PAN1316C (ENW89823C4KF) is the identical module, but with an RF bottom pad for an external antenna instead.
You can find long-lived documents on the official product websites: