I need to mix two SPI devices, with different supply voltages, 3.0v and 3.9v on the same PICAXE circuit.
The devices are an RFM22 transceiver (100mW) and a RFM23BP transceiver (1W)
I have a working circuit board that uses both devices on a 3.0v regulator, but to get the full 1 Watt out of the RFM23BP, its needs to be run direct off the battery supply, 3.9v.
I need 6 lines of level translation;
Outputs from 3.0v to 3.9v, SDI, SCK, NSEL,Shutdown, GPIO pin.
Input from 3.9v to 3.0v, SDO
Minimum part count is essential, so a single IC in SOIC or TSSOP would be best.
Bi-directional level translation is not needed, and the PICAXE is only run at 8 or 16Mhz.
Anyone tried this and have a device they would like to recommend ?
The devices are an RFM22 transceiver (100mW) and a RFM23BP transceiver (1W)
I have a working circuit board that uses both devices on a 3.0v regulator, but to get the full 1 Watt out of the RFM23BP, its needs to be run direct off the battery supply, 3.9v.
I need 6 lines of level translation;
Outputs from 3.0v to 3.9v, SDI, SCK, NSEL,Shutdown, GPIO pin.
Input from 3.9v to 3.0v, SDO
Minimum part count is essential, so a single IC in SOIC or TSSOP would be best.
Bi-directional level translation is not needed, and the PICAXE is only run at 8 or 16Mhz.
Anyone tried this and have a device they would like to recommend ?