DS3930 Rev 0 4/03 Hex Nonvolatile Potentiometer with I/O and Memory General Description Features The DS3930 contains six 256-position nonvolatile (NV) Six 256-Position NV Potentiometers potentiometers, 64 bytes of NV user EEPROM memory, Four General-Purpose NV I/O Pins and four programmable NV I/O pins. The six poten- tiometers all share a common low side. The potentiome- 64 Bytes of User EEPROM Memory ters are separated into two groups of three 50k 0 to 5.5V on Any Potentiometer Terminal, potentiometers in parallel. Each group of three poten- tiometers shares a common high side and forms an Independent of V CC equivalent resistance of 16.6k (three 50k poten- All Six Potentiometers Share a Common Low Side tiometers in parallel). Potentiometers Separated into Two Groups of Three Potentiometers, Each Sharing a Common High Side Applications 2-Wire Serial Interface RF Transceivers Wide Supply Range (2.7V to 5.5V) Voltage References Up to Eight DS3930s Can Share the Same Power Supply Calibration 2-Wire Bus Mobile Phones and PDAs Fiber Optic Transceiver Modules Ordering Information Portable Electronics Radio Tuners PART PIN-PACKAGE DS3930E 20 TSSOP Small, Low-Cost Replacement for Mechanical Potentiometers Pin Configuration Typical Operating Circuit TOP VIEW V CC V CC A0 1 20 HI 0-2 HI A0 0-2 A1 2 19 W0 A1 W0 4.7k 4.7k A2 3 18 W 1 WIPER W1 A2 TERMINALS SDA 4 17 W 2 W 2 SDA DS3930 2-WIRE SCL 5 16 LO 0-5 INTERFACE SCL LO 0-5 I/O 6 15 HI 0 3-5 DS3930 I/O 0 HI3-5 I/O 7 14 1 W 3 DIGITAL W I/O 3 I/O 8 13 W 1 2 4 NONVOLATILE I/O WIPER W V 9 12 W I/O 4 CC 5 2 V CC TERMINALS W GND 10 11 I/O 5 3 VCC DECOUPLING CAP DIGITAL 0.1F GND I/O 3 NONVOLATILE I/O TSSOP Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.Hex Nonvolatile Potentiometer with I/O and Memory ABSOLUTE MAXIMUM RATINGS Voltage on V Relative to Ground...................... -0.5V to +6.0V Operating Temperature Range .......................... -40C to +85C CC Voltage on I/O , I/O , I/O , I/O , SDA, SCL, A0, A1, and A2 Programming Temperature Range .........................0C to +70C 0 1 2 3 Relative to Ground* .............................. -0.5V to (V + 0.5V) Storage Temperature Range .............................-55C to +125C CC Voltage on LO , W , HI , and HI Soldering Temperature.................. See IPC/JEDEC J-STD-020A 0-5 0-5 0-2 3-5 Relative to Ground ............................................-0.5V to +6.0V Current Through W ........................................................ 1mA 0-5 *This voltage must not exceed 6.0V. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. RECOMMENDED DC OPERATING CONDITIONS (T = -40 to +85C) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage V (Note 1) +2.7 +5.5 V CC Input Logic 1 (SDA, SCL, A0, A1, 0.7 x V + CC V V IH A2, I/O , I/O , I/O , I/O ) V 0.3 0 1 2 3 CC Input Logic 0 (SDA, SCL, A0, A1, 0.3 x V -0.3 V IL A2, I/O , I/O , I/O , I/O ) V 0 1 2 3 CC Wiper Current I -1 +1 mA W Potentiometer Terminals V = +2.7V to +5.5V -0.3 +5.5 V CC (LO , W , HI , and HI 0-5 0-5 0-2 3-5) DC ELECTRICAL CHARACTERISTICS (V = +2.7V to +5.5V T = -40C to +85C, unless otherwise specified.) CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Input Leakage I -1 +1 A IL V 3mA sink current 0 0.4 V Low-Level Output Voltage (SDA, OL1 I/O , I/O , I/O , I/O ) 0 1 2 3 V 6mA sink current 0 0.6 V OL2 I/O Capacitance C 10 pF I/O I/O Pullup Resistor Value R 3.5 5 7.0 k I/O 3V (Note 2) 160 300 Standby Current I A STBY 5V (Note 2) 195 350 2 DS3930