DS3904U-020 ,Triple 128-Position Nonvolatile Digital Variable Resistor/SwitchApplications10 µSOP 20kΩ + Hi-ZDS3905U-020 -40°C to +85°CPower-Supply CalibrationCell Phones and PD ..
DS3904U-020 ,Triple 128-Position Nonvolatile Digital Variable Resistor/SwitchFeaturesThe DS3904/DS3905 contain three nonvolatile (NV) low ♦ Three 20kΩ , 128-Position Linear Dig ..
DS3904U-020+ ,Triple, 128-Position, Nonvolatile, Variable, Digital Resistor/SwitchFeaturesThe DS3904/DS3905 contain three nonvolatile (NV) low ♦ Three 20kΩ Ω, or Two 20kΩ Ω and One ..
DS3905 ,Triple, 128-Position, Nonvolatile, Variable, Digital Resistor/SwitchApplicationsDS3904U-010 -40°C to +85°C 8 μSOP 20/10/20 + High-Z Power-Supply CalibrationDS3904U-020 ..
DS3905U-020+ ,Triple, 128-Position, Nonvolatile, Variable, Digital Resistor/SwitchApplicationsDS3904U-010 -40°C to +85°C 8 μSOP 20/10/20 + High-Z Power-Supply CalibrationDS3904U-020 ..
DS3984T , 4-Channel Cold-Cathode Fluorescent Lamp Controller
EC2-12NU ,COMPACT AND LIGHTWEIGHT, SMALL MOUNTING SIZE, HIGH BREAKDOWN VOLTAGE
EC2-24 ,COMPACT AND LIGHTWEIGHT, SMALL MOUNTING SIZE, HIGH BREAKDOWN VOLTAGE
EC2-24NU ,COMPACT AND LIGHTWEIGHT, SMALL MOUNTING SIZE, HIGH BREAKDOWN VOLTAGE
EC2-4.5NJ ,COMPACT AND LIGHTWEIGHT, SMALL MOUNTING SIZE, HIGH BREAKDOWN VOLTAGE
EC2-4.5NU ,COMPACT AND LIGHTWEIGHT, SMALL MOUNTING SIZE, HIGH BREAKDOWN VOLTAGE
EC2-4.5TNU ,COMPACT AND LIGHTWEIGHT, SMALL MOUNTING SIZE, HIGH BREAKDOWN VOLTAGE
DS3904U-020
Triple 128-Position Nonvolatile Digital Variable Resistor/Switch
General DescriptionThe DS3904/DS3905 contain three nonvolatile (NV) low
temperature coefficient, variable digital resistors. Each
resistor has 128 user-selectable positions. Additionally,
the DS3904/DS3905 have a high-impedance setting that
allows each resistor to function as a digital switch. The
DS3904/DS3905 can operate over a 2.7V to 5.5V supply
voltage range, and communication with the device is
achieved through a 2-wire serial interface. Address pins
allow multiple DS3904/DS3905s to operate on the same
two-wire bus. The DS3904 has one address pin, allow-
ing two DS3904s to share the bus, while the DS3905
has three address pins, allowing up to eight DS3905s to
share a common bus. The low-cost and small size of the
DS3904/DS3905 make them ideal replacements for con-
ventional mechanical trimming resistors.
ApplicationsPower-Supply Calibration
Cell Phones and PDAs
Fibre Optic Transceiver Modules
Portable Electronics
Small and Low-Cost Replacement for
Conventional Mechanical Trimming Resistors/
Dip Switches
Test Equipment
FeaturesThree 20kΩ, 128-Position Linear Digital ResistorsResistor Settings are Stored in NVMemoryEach Resistor has a High-Impedance Setting for
Switch Operation to Control Digital LogicLow Temperature Coefficient2-Wire Serial Interface2.7V to 5.5V Operating Range-40°C to +85°C Industrial TemperaturePackaging: 8-Pin µSOP for DS3904, 10-pin µSOP
for DS3905
DS3904/DS3905riple 128-Position Nonvolatile Digital
Variable Resistor/Switch
Pin Configurations
Typical Operating CircuitRev 1; 8/03
DS3904/DS3905riple 128-Position Nonvolatile
Variable Digital Resistor/Switch
ABSOLUTE MAXIMUM RATINGS
RECOMMENDED DC OPERATING CONDITIONS(TA= -40°C to +85°C)
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.
Voltage on VCCPin Relative to Ground.................-0.5V to +6.0V
Voltage on SDA, SCL, A0, A1, A2
Relative to Ground*...................................-0.5V to VCC+ 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°C to +85°C
Programming Temperature Range.........................0°C to +70°C
Storage Temperature Range.............................-55°C to +125°C
Soldering Temperature................See J-STD-020A Specification
DC ELECTRICAL CHARACTERISTICS
ANALOG RESISTOR CHARACTERISTICS(VCC= +2.7V to +5.5V, TA= -40°C to +85°C, unless otherwise noted.)
*This voltage must not exceed 6.0V.
DS3904/DS3905riple 128-Position Nonvolatile Digital
Variable Resistor/Switch
AC ELECTRICAL CHARACTERISTICS
NONVOLATILE MEMORY CHARACTERISTICS(VCC= +2.7V to +5.5V, TA= +70°C.)
DS3904/DS3905riple 128-Position Nonvolatile Digital
Variable Resistor/Switch
Note 1:All voltages are referenced to ground.
Note 2:Applies to A0, SDA, SCL for the DS3904 and A0, A1, A2, SDA, SCL for the DS3905. Also applies to H0, H1,
H2 for both DS3904 and DS3905 when in the high-impedance state.
Note 3:ISTBYspecified with SDA = SCL = VCCand A0 = GND.
Note 4:Absolute linearity is used to determine expected resistance. Absolute linearity is defined as the deviation
from the straight line drawn from the value of the resistance at position 00h to the value of the resistance at
position 7Fh.
Note 5:Relative linearity is used to determine the change of resistance between two adjacent resistor positions.
Note 6:Temperature coefficient specifies the change in resistance as a function of temperature. The temperature
coefficient varies with resistor position. Limits are guaranteed by design.
Note 7:A fast-mode device can be used in a standard-mode system, but the requirement tSU:DAT> 250ns must
then be met. This is automatically the case if the device does not stretch the LOW period of the SCL signal.
If such a device does stretch the LOW period of the SCL signal, it must output the next data bit to the SDA
line tRMAX+ tSU:DAT= 1000ns + 250ns =1250ns before the SCL line is released.
Note 8:After this period, the first clock pulse is generated.
Note 9:The maximum tHD:DAThas only to be met if the device does not stretch the LOW period (tLOW) of the SCL
signal.
Note 10:CB—total capacitance of one bus line in picofarads, timing referenced to 0.9 x VCCand 0.1 x VCC.
Note 11:EEPROM write begins after a stop condition occurs.
NONVOLATILE MEMORY CHARACTERISTICS (continued)(VCC= +2.7V to +5.5V, TA= +70°C.)
DS3904/DS3905riple 128-Position Nonvolatile Digital
Variable Resistor/Switchypical Operating Characteristics(VCC= +5.0V, TA= +25°C, unless otherwise noted.)
DS3904/DS3905riple 128-Position Nonvolatile Digital
Variable Resistor/Switchypical Operating Characteristics (continued)(VCC= +5.0V, TA= +25°C, unless otherwise noted.)
