Hex Nonvolatile Potentiometer with I/O and Memory

The DS3930 contains six 256-position nonvolatile (NV) potentiometers, 64 bytes of NV user EEPROM memory, and four programmable NV I/O pins. The six potentiometers all share a common low side. The potentiometers are separated into two groups of three 50kΩ potentiometers in parallel. Each group of three potentiometers shares a common high side and forms an equivalent resistance of 16.6kΩ (three 50kΩ potentiometers in parallel).

Applications

* Fiber Optic Transceiver Modules * Mobile Phones and PDAs * Portable Electronics * Power Supply Calibration * Radio Tuners * RF Transceivers * Small, Low-Cost Replacement for Mechanical Potentiometers Features * Voltage References

* Six 256-Position NV Potentiometers

* Four General-Purpose NV I/O Pins

* 64 Bytes of User EEPROM Memory

* 0 to 5.5V on Any Potentiometer Terminal, Independent of VCC

* All Six Potentiometers Share a Common Low Side

* Potentiometers Separated into Two Groups of Three Potentiometers, Each Sharing a Common High Side

* 2-Wire Serial Interface

* Wide Supply Range (2.7V to 5.5V)

* Up to Eight DS3930s Can Share the Same 2-Wire Bus