DS4301U-200 ,Nonvolatile/ 32-Position Digital PotentiometerApplicationsWhite LED Backlight Brightness ControlPART TEMP RANGE PIN-PACKAGEPortable Battery-Power ..
DS4301U-200+ ,Nonvolatile, 32-Position Digital PotentiometerApplicationsWhite LED Backlight Brightness ControlPART TEMP RANGE PIN-PACKAGEPortable Battery-Power ..
DS4301Z-200 ,Nonvolatile, 32-Position Digital PotentiometerELECTRICAL CHARACTERISTICS(V = V to V ; T = -40°C to +85°C, unless otherwise specified.)CC CC MIN C ..
DS4302Z-020+ ,2-Wire, 5-Bit DAC with Three Digital OutputsPin Description Pin ConfigurationPIN NAME FUNCTIONTOP VIEW1 SCL Serial Clock Input. 2-wire clock in ..
DS4303 ,Voltage Sample and Infinite HoldApplications♦ Low Power ConsumptionPower-Supply Calibration♦ 2.4V to 3.6V Single-Supply OperationTh ..
DS4303K ,Electronically Programmable Voltage ReferenceApplications♦ Low Power ConsumptionPower-Supply Calibration♦ 2.4V to 3.6V Single-Supply OperationTh ..
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
DS4301U-200
Nonvolatile/ 32-Position Digital Potentiometer
General DescriptionThe DS4301 is a single 32-position linear digital poten-
tiometer with 200kΩend-to-end resistance. The wiper
setting is stored in EEPROM, so the DS4301 powers up
with the last stored setting. The position of the wiper is
controlled through a simple three-terminal
increment/decrement interface. The DS4301 is ideal for
white LED backlight brightness control. Its 8-pin µSOP
package, 2.4V to 5.5V supply range, and 200kΩend-
to-end resistance are especially suited for portable,
battery-powered applications such as cellular tele-
phones and PDAs.
ApplicationsWhite LED Backlight Brightness Control
Portable Battery-Powered Devices such as PDAs
and Cellular Phones
Any Application that Requires a Small, Low-Cost
NV Potentiometer
FeaturesSingle, 32-Position, 200kΩLinear Nonvolatile (NV)
Potentiometer Ideal for Battery-Powered
ApplicationsThree-Terminal Increment/Decrement Interface to
Adjust Wiper PositionWide Voltage Supply Range (2.4V to 5.5V)Command-Initiated NV Wiper StorageOperates Over the Industrial Temperature Range
(-40°C to +85°C)Available in 8-Pin µSOP
DS4301
Nonvolatile, 32-Position Digital Potentiometer
Pin Configuration
Ordering Information
Typical Operating CircuitRev 0; 8/03
DS4301
Nonvolatile, 32-Position Digital Potentiometer
ABSOLUTE MAXIMUM RATINGS
RECOMMENDED DC OPERATION CONDITIONS(VCC= VCC MINto VCC MAX; TA= -40°C to +85°C, unless otherwise specified.)
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 Range on VCCPin Relative to Ground.....-0.5V to +6.0V
Voltage Range on CS, INC, U/D, L, W, H Pins
Relative to Ground*.....................................-0.5V to VCC+ 0.5V
Wiper Current.....................................................................±3mA
Operating Temperature Range...........................-40°C to +85°C
Programming Temperature.....................................0°C to +70°C
Storage Temperature Range.............................-55°C to +125°C
Soldering Temperature.......................................See IPC/JEDEC
J-STD-020A Specification
*Not to exceed 6.0V
DC ELECTRICAL CHARACTERISTICS(VCC= VCCMINto VCCMAX; TA= -40°C to +85°C, unless otherwise specified.)
ANALOG RESISTOR CHARACTERISTICS(VCC= VCCMINto VCCMAX; TA= -40°C to +85°C, unless otherwise specified.)
DS4301
Nonvolatile, 32-Position Digital Potentiometer
Note 1:All voltages are referenced to ground.
Note 2:STBYspecified for VCCequal to 3.0V and 5.0V while control port logic pins are driven to VCCor GND.
Note 3:Absolute linearity is used to determine wiper voltage versus expected voltage as determined by wiper position.
Note 4:Relative linearity is used to determine the change of wiper voltage between two adjacent wiper positions.
Note 5:The INClow to CSinactive time is the transition time that allows the three control pins to become inactive without writing
the wiper position to the EEPROM.
Note 6:Wiper storage time is the time required for the wiper position to be written to the EEPROM. During this time, the three-ter-
minal interface is inactive.
Note 7:Wiper load time is specified as the time required to load the wiper position stored in EEPROM once VCChas reached a
stable operating voltage greater than or equal to VCC MIN.
Note 8:Power-up time is specified as the time required before the three control pins become active once a stable power supply
level of at least VCC MINhas been reached.
Note 9:The maximum number of EEPROM write cycles is guaranteed by design and is not tested in production.
AC ELECTRICAL CHARACTERISTICCS(VCC= VCCMINto VCCMAX; TA= -40°C to +85°C. See Figure2 for timing diagram.)
NONVOLATILE MEMORY CHARACTERISTICS(VCC= VCCMINto VCC MAX)
DS4301
Nonvolatile, 32-Position Digital Potentiometer
Typical Operating Characteristics(VCC= 5.0V; TA = +25°C, unless otherwise noted.)
DS4301
Nonvolatile, 32-Position Digital Potentiometerypical Operating Characteristics (continued)(VCC= 5.0V; TA = +25°C, unless otherwise noted.)
Pin Description
DS4301
Detailed DescriptionThe DS4301 is a single nonvolatile digital potentiome-
ter. This 32-position linear potentiometer has an end-to-
end resistance of 200kΩ, and operates over a wide
2.4V to 5.5V supply voltage range. The wiper position is
controlled by the three interface pins (U/D, CS, and
INC), and the wiper setting can be stored in EEPROM
on command.
Power-UpOn power-up, once a stable supply voltage of VCC MIN
has been reached, the stored wiper setting is loaded
from the EEPROM within tWLT. Also on power-up, the
DS4301 wiper control pins become active approximate-
ly tPUafter a stable supply voltage of VCC MINhas
been reached.
Wiper ControlAdjusting the wiper of the DS4301 involves using the
three control pins (U/D, CS, and INC). See the Timing
Diagramin Figure2. To enable wiper adjustment, a
high-to-low transition on the CSpin is required. HoldCSlow for the duration of the communication. Doing
this enables the INCpin to change the wiper position.
Set the U/Dpin high to increment or low to decrement
the wiper position. The state of the U/Dpin should be
set more than tDIbefore the INCsignal is transitioned
from high to low. After the CSpin is active low, a high-
to-low transition on the INCpin moves the wiper in the
direction dictated by the U/Dpin. Continue to pulse
INC(high to low) until the desired wiper position is
reached. On the last edge, hold the INCline low. With
the desired wiper position set, there are two ways to
proceed. One method terminates communication with-
out allowing the value of the current wiper position to
be written to the EEPROM. This is done by transitioning
the CSsignal to the high state before bringing the INC
signal high. As long as the state of the CSpin is high
before the state of the INCpin goes high, the current
wiper setting is not written to EEPROM. Because the
current wiper setting was not stored to the NV memory,
the previously stored wiper setting, not the current
wiper setting, is loaded from memory if power is cycled
to the device
The other method is used to store a new wiper setting
in the EEPROM. This is done by bringing the state of
the INCpin high for a time of tICbefore bringing the
state of the CSpin high. Once the states of both CS
and INCpins are high, the current wiper setting is
stored in EEPROM after a time of tWST. If power is
Nonvolatile, 32-Position Digital Potentiometer
