DS3905 Fast Delivery |IC PHOENIX CO.,LIMITED

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
DS3984T+ ,4-Channel Cold-Cathode Fluorescent Lamp ControllerApplications♦ Per-Channel Lamp Control Ensures EqualLCD TelevisionsBrightness Among Lamps and Maxim ..
DS3988 ,8-Channel Cold-Cathode Fluorescent Lamp ControllerApplications♦ Per-Channel Lamp Control Ensures EqualLCD TelevisionsBrightness Among Lamps and Maxim ..
DS3988T+ ,8-Channel Cold-Cathode Fluorescent Lamp ControllerELECTRICAL CHARACTERISTICS(V = +4.5V to +5.5V, T = -40°C to +85°C.)CC APARAMETER SYMBOL CONDITIONS ..
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

DS3905
Triple, 128-Position, Nonvolatile, Variable, Digital Resistor/Switch
General Description
The 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.
Applications
Power-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 20kΩΩ, or Two 20kΩΩand One 10kΩΩ,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
0.1μF
4.7kΩ
2-WIRE
MASTER
VCCVCC
RHIZR10VCC
SCL
SDA
(DS3905 ONLY)A1
RESISTOR 0
ADDR F8h
RESISTOR 1
ADDR F9h
RESISTOR 2
ADDR FAh
GND
4.7kΩ
VARIABLE RESISTANCE
FOR ADJUSTABLE
CURRENT SOURCE
INTERFACE EXAMPLES
2-WIRE
ADDRESSABLE
SWITCH (USING 00h
AND RHIZ SETTINGS)
GAIN
CONTROL
VIN
DS3904/DS3905
VCC
RHIZ
RHIZ
R11DIGITAL
LOGIC
R12
Typical Operating Circuit
Ordering Information
Rev 3; 3/07
PARTTEMP RANGEPIN-
PACKAGE
(R0/R1/R2)
RESISTANCE (k)
DS3904U-010 -40°C to +85°C 8 μSOP 20/10/20 + High-Z
DS3904U-020 -40°C to +85°C 8 μSOP 20/20/20 + High-Z
DS3905U-020 -40°C to +85°C 10 μSOP 20/20/20 + High-Z
SDA
TOP VEIW2SCLH0
μSOP
VCC
GND
DS39041A1A22SDAA0
μSOP3H0SDL4H1VCC5H2GND
DS3905
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-020 Specification
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Supply VoltageVCC(Note 1)2.75.5V
Input Logic 1VIH0.7 x
VCC
VCC +
0.3V
Input Logic 0VIL-0.30.3 x
VCCV
Resistor CurrentIR3mA
Resistor Terminals H0, H1, H2VCC = +2.7V to +5.5V-0.3+5.5V
DC ELECTRICAL CHARACTERISTICS
(VCC= +2.7V to +5.5V, TA= -40°C to +85°C, unless otherwise noted.)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Input LeakageIL(Note 2)-1+1µA
VCC = 3V (Note 3)95200Standby Supply CurrentISTBYVCC = 5V (Note 3)145200µA
VOL13mA sink current00.4Low-Level Output Voltage (SDA)VOL26mA sink current00.6V
ANALOG RESISTOR CHARACTERISTICS
(VCC= +2.7V to +5.5V, TA= -40°C to +85°C, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
20k resistor-1+1Absolute Linearity (Note 4)INL10k resistor-1+1LSB
20k resistor-0.5+0.5
Relative Linearity (Note 5)DNL10k resistor-0.5+0.5LSB
Position 7Fh (20k resistor)-200+123+400Temperature Coefficient (Note 6)Position 7Fh (10k resistor)-150+173+450ppm/°C
*This voltage must not exceed 6.0V.
DS3904/DS3905riple 128-Position Nonvolatile Digital
Variable Resistor/Switch
AC ELECTRICAL CHARACTERISTICS
(VCC= +2.7V to +5.5V, TA= -40°C to +85°C.)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Fast mode0400SCL Clock Frequency
(Note 7)fSCLStandard mode0100kHz
Fast mode1.3Bus Free Time between STOP
and START Conditions (Note 7)tBUFStandard mode4.7µs
Fast mode0.6Hold Time (Repeated) START
Condition (Notes 7, 8)tHD:STAStandard mode4.0µs
Fast mode1.3Low Period of SCL Clock
(Note 7)tLOWStandard mode4.7µs
Fast mode0.6High Period of SCL Clock
(Note 7)tHIGHStandard mode4.0µs
Fast mode00.9Data Hold Time
(Notes 7, 9)tHD:DATStandard mode00.9µs
Fast mode100Data Setup Time
(Note 7)tSU:DATStandard mode250ns
Fast mode0.6Start Setup TimetSU:STAStandard mode4.7µs
Fast mode20 + 0.1CB300Rise Time of Both SDA and SCL
Signals (Note 10)tRStandard mode20 + 0.1CB1000ns
Fast mode20 + 0.1CB300Fall Time of Both SDA and SCL
Signals (Note 10)tFStandard mode20 + 0.1CB300ns
Fast mode0.6Setup Time for STOP ConditiontSU:STOStandard mode4.0µs
Capacitive Load for Each Bus
LineCB(Note 10)400pF
EEPROM Write TimetW(Note 11)1020ms
Startup TimetST2ms
ANALOG RESISTOR CHARACTERISTICS (continued)
(VCC= +2.7V to +5.5V, TA= -40°C to +85°C, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
TA = +25°C (20k resistor)14.52025.5Position 7Fh ResistanceRMAXTA = +25°C (10k resistor)81012k
Position 00h ResistanceRMINTA = +25°C200500
High ImpedanceRHIZ5.5 M
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
(VCC= +2.7V to +5.5V, TA= +70°C.)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
EEPROM Writes50,000
DS3904/DS3905riple 128-Position Nonvolatile Digital
Variable Resistor/Switch
Typical Operating Characteristics
(VCC= +5.0V, TA= +25°C, unless otherwise noted.)
SUPPLY CURRENT
vs. TEMPERATURE
DS3904/5 toc01
TEMPERATURE (°C)
SUPPLY CURRENT (40-20020
VCC = +5V
VCC = +3V
SDA = SCL =VCC
ADDRESS PINS
CONNECTED TO GND
SUPPLY CURRENT
vs. SCL FREQUENCY
DS3904/5 toc02
SCL FREQUENCY (kHz)
SUPPLY CURRENT (
VCC = SDA = +5V
ADDRESS PINS
CONNECTED TO GND
RESISTANCE vs.
RESISTOR SETTING
DS3904/5 toc03
RESISTOR SETTING (DEC)
RESISTANCE (k
20kΩ RESISTOR
10kΩ RESISTOR
TEMPERATURE COEFFICIENT vs.
RESISTOR SETTING
DS3904/5 toc04
RESISTOR SETTING (DEC)
TEMPERATURE COEFFICIENT (ppm/
°C)
TC OF +25°C TO +85°C
TC OF +25°C TO -40°C
20kΩ RESISTOR
TEMPERATURE COEFFICIENT vs.
RESISTOR SETTING
DS3904/5 toc05
RESISTOR SETTING (DEC)
TEMPERATURE COEFFICIENT (ppm/
°C)
TC OF +25°C TO +85°C
TC OF +25°C TO -40°C
10kΩ RESISTOR
POSITION 7Fh RESISTANCE PERCENT CHANGE
FROM +25°C vs. TEMPERATURE
DS3904/5 toc06
TEMPERATURE (°C)
RESISTANCE % CHANGE (FROM +256040200-20
20kΩ RESISTOR
10kΩ RESISTOR
POSITION 00h RESISTANCE PERCENT CHANGE
FROM +25°C vs. TEMPERATURE
DS3904/5 toc07
TEMPERATURE (°C)
RESISTANCE % CHANGE (FROM +256020400-20
20kΩ RESISTOR
10kΩ RESISTOR
RESISTANCE vs. POWER-UP VOLTAGE
DS3904/5 toc08
POWER-UP VOLTAGE (V)
RESISTANCE (k4321
EEPROM RECALL
>5.5MΩ
PROGRAMMED RESISTANCE
RESISTANCE vs. POWER-DOWN VOLTAGE
DS3904/5 toc09
POWER-DOWN VOLTAGE (V)
RESISTANCE (k4321
EEPROM RECALL
PROGRAMMED RESISTANCE
>5.5MΩ
DS3904/DS3905riple 128-Position Nonvolatile Digital
Variable Resistor/Switch
Typical Operating Characteristics (continued)
(VCC= +5.0V, TA= +25°C, unless otherwise noted.)
POSITION 3Fh RESISTANCE vs.
SUPPLY VOLTAGE
DS3904/5 toc10
SUPPLY VOLTAGE (V)
POSITION 3Fh RESISTANCE (k
10kΩ RESISTOR
20kΩ RESISTOR
ABSOLUTE LINEARITY vs.
RESISTOR 0 POSITION
DS3904/5 toc11
RESISTOR 0 POSITION (DEC)
ABSOLUTE LINEARITY (LSB)
RESISTOR 0
20kΩ
RELATIVE LINEARITY vs.
RESISTOR 0 POSITION
DS3904/5 toc12
RESISTOR 0 POSITION (DEC)
RELATIVE LINEARITY (LSB)
RESISTOR 0
20kΩ
ABSOLUTE LINEARITY vs.
RESISTOR 1 POSITION
DS3904/5 toc13
RESISTOR 1 POSITION (DEC)
ABSOLUTE LINEARITY (LSB)
RESISTOR 1
20kΩ
RELATIVE LINEARITY vs.
RESISTOR 1 POSITION
DS3904/5 toc14
RESISTOR 1 POSITION (DEC)
RELATIVE LINEARITY (LSB)
RESISTOR 1
20kΩ
ABSOLUTE LINEARITY vs.
RESISTOR 2 POSITION
DS3904/5 toc15
RESISTOR 2 POSITION (DEC)
ABSOLUTE LINEARITY (LSB)
RESISTOR 2
20kΩ
RELATIVE LINEARITY vs.
RESISTOR 2 POSITION
DS3904/5 toc16
RESISTOR 2 POSITION (DEC)
RELATIVE LINEARITY (LSB)
RESISTOR 2
20kΩ
ABSOLUTE LINEARITY vs.
RESISTOR 1 POSITION
DS3904/5 toc17
RESISTOR 1 POSITION (DEC)
ABSOLUTE LINEARITY (LSB)
RESISTOR 1
10kΩ
RELATIVE LINEARITY vs.
RESISTOR 1 POSITION
DS3904/5 toc18
RESISTOR 1 POSITION (DEC)
RELATIVE LINEARITY (LSB)
RESISTOR 1
10kΩ

Partno	Mfg	Dc	Qty	Available	Descript
DS3905	DS	N/a	34	avai	Triple, 128-Position, Nonvolatile, Variable, Digital Resistor/Switch