DS3904

Features:

 Three 20kΩ, 128-Position Linear Digital Resistors
 Resistor Settings are Stored in NV Memory
  Each Resistor has a High-Impedance Setting forSwitch Operation to Control Digital Logic
  Low Temperature Coefficient
  2-Wire Serial Interface
  2.7V to 5.5V Operating Range
  -40 to +85 Industrial Temperature
  Packaging: 8-Pin µSOP for DS3904, 10-pin µSOPfor DS3905


Pinout




Specifications

Voltage on V_CC Pin Relative to Ground.................-0.5V to +6.0V
Voltage on SDA, SCL, A0, A1, A2
Relative to Ground*......................................-0.5V to V_CC + 0.5V
Voltage on H0, H1, and
H2 Relative to Ground............................................-0.5V to +6.0V
Current Through H0, H1, and H2..........................................3mA
Operating Temperature Range ..........................-40 to +85
Programming Temperature Range ........................0 to +70
Storage Temperature Range ............................-55 to +125
Soldering Temperature ......................See J-STD-020A Specification


Description

The DS3904/DS3905 contain three nonvolatile (NV) lowtemperature coefficient, variable digital resistors. Eachresistor has 128 user-selectable positions. Additionally,the DS3904/DS3905 have a high-impedance setting thatallows each resistor to function as a digital switch. TheDS3904/DS3905 can operate over a 2.7V to 5.5V supplyvoltage range, and communication with the device isachieved through a 2-wire serial interface. Address pinsallow multiple DS3904/DS3905s to operate on the sametwo-wire bus. The DS3904 has one address pin, allow-ng two DS3904s to share the bus, while the DS3905has three address pins, allowing up to eight DS3905s toshare a common bus. The low-cost and small size of theDS3904/DS3905 make them ideal replacements for con-ventional mechanical trimming resistors.