100-position linear taper potentiometer Non-volatile EEPROM wiper storage 10nA ultra-low standby current Single supply operation: � 6.0V Increment up/down serial interface Resistance values: 10k, 50k and 100k Available in PDIP, SOIC, TSSOP and MSOP packagesDESCRIPTION
The is a single digitally programmable potentiometer (DPPTM) designed as a electronic replacement for mechanical potentiometers. Ideal for automated adjustments on high volume production lines, they are also well suited for applications where equipment requiring periodic adjustment is either difficult to access or located in a hazardous or remote environment. The CAT5113 contains a 100-tap series resistor array connected between two terminals RH and RL. An up/ down counter and decoder that are controlled by three input pins, determines which tap is connected to the wiper, RW. The wiper setting, stored in nonvolatile memory, is not lost when the device is powered down and is automatically reinstated when power is returned. The wiper can be adjusted to test new system values without affecting the stored setting. Wiper-control of the CAT5113 is accomplished with , U/D � , and INC The INC three input control pins, CS input increments the wiper in the direction which is � input. The CS determined by the logic state of the U/D input is used to select the device and also store the wiper position prior to power down. The digitally programmable potentiometer can be used as a three-terminal resistive divider as a twoterminal variable resistor.APPLICATIONS
Automated product calibration Remote control adjustments Offset, gain and zero control Tamper-proof calibrations Contrast, brightness and volume controls Motor controls and feedback systems Programmable analog functionsSTORE AND RECALL CONTROL CIRCUITRY 5-BIT NONVOLATILE MEMORY 5-BIT UP/DOWN COUNTER 31 30
� Catalyst Semiconductor, Inc. Characteristics subject to change without notice
Increment Control Up/Down Control Potentiometer High Terminal Wiper Terminal Potentiometer Low Terminal Chip Select Supply Voltage
: Increment Control Input INC input moves the wiper in the up or down The INC � input. direction determined by the condition of the U/D � : Up/Down Control Input U/D � input controls the direction of the wiper The U/D is low, any movement. When in a high state and CS will cause the wiper to high-to-low transition on INC move one increment toward the RH terminal. When in is low, any high-to-low transition a low state and CS will cause the wiper to move one increment on INC towards the RL terminal. RH: High End Potentiometer Terminal RH is the high end terminal of the potentiometer. It is not required that this terminal be connected to a potential greater than the RL terminal. Voltage applied to the RH terminal cannot exceed the supply voltage, VCC or go below ground, GND. RW: Wiper Potentiometer Terminal RW is the wiper terminal of the potentiometer. Its position on the resistor array is controlled by the U/D � and CS Voltage applied to control inputs, INC the RW terminal cannot exceed the supply voltage, VCC or go below ground, GND. RL: Low End Potentiometer Terminal RL is the low end terminal of the potentiometer. It is not required that this terminal be connected to a potential less than the RH terminal. Voltage applied to the RL terminal cannot exceed the supply voltage, VCC or go below ground, GND. RL and RH are electrically interchangeable. : Chip Select CS The chip select input is used to activate the control input of the CAT5113 and is active low. When in a
and U/D � inputs will not high state, activity on the INC affect or change the position of the wiper.
The CAT5113 operates like a digitally controlled potentiometer with RH and RL equivalent to the high and low terminals and RW equivalent to the mecha� nical potentiometer's wiper. There are 100 available tap positions including the resistor end points, RH and RL. There are 99 resistor elements connected in series between the RH and RL terminals. The wiper terminal is connected to one of the 100 taps and U/D � and CS These controlled by three inputs, INC inputs control a seven-bit up/down counter whose output is decoded to select the wiper position. The selected wiper position can be stored in non-volatile and CS inputs. memory using the INC set LOW the CAT5113 is selected and will With CS � and INC inputs. HIGH to LOW respond to the U/D wil increment or decrement the transitions on INC � input and wiper (depending on the state of the U/D seven-bit counter). The wiper, when at either fixed terminal, acts like its mechanical equivalent and does not move beyond the last position. The value of the counter is stored in nonvolatile memory whenever CS input is also HIGH. transitions HIGH while the INC When the CAT5113 is powered-down, the last stored wiper counter position is maintained in the nonvolatile memory. When power is restored, the contents of the memory are recalled and the counter is set to the value stored. set low, the CAT5113 may be de-selected With INC and powered down without storing the current wiper position in nonvolatile memory. This allows the system to always power to a preset value stored in nonvolatile memory.
OPERATION MODES INC High to Low High to Low High Low X CS Low to High Low to High � U/D High Low X Operation Wiper toward H Wiper toward L Store Wiper Position No Store, Return to Standby
ABSOLUTE MAXIMUM RATINGS(1) Parameters Supply Voltage VCC to GND Inputs to GND CS to GND INC � to GND U/D H to GND L to GND W to GND Ratings -0.5 to VCC -0.5 to VCC -0.5 to VCC -0.5 to VCC -0.5 to VCC -0.5 to VCC +0.5 Units Parameters Operating Ambient Temperature Commercial (`C' or Blank suffix) Industrial (`I' suffix) Junction Temperature Storage Temperature Lead Soldering (10s max) Ratings 150 +300 Units �C
RELIABILITY CHARACTERISTICS Symbol ILTH(2) (3) TDR NEND Parameter ESD Susceptibility Latch-Up Data Retention Endurance Test Method MIL-STD-883, Test Method 3015 JEDEC Standard 17 MIL-STD-883, Test Method 1008 MIL-STD-883, Test Method 1003 Min Typ Max Units V mA Years Stores
DC ELECTRICAL CHARACTERISTICS VCC to +6V unless otherwise specified Power Supply Symbol VCC ICC2 ISB1(3) Parameter Operating Voltage Range Supply Current (Increment) Supply Current (Write) Supply Current (Standby) VCC = 0 VCC = 0 Programming, VCC = 6V VCC 3V = VCC � , INC = VCC 0.3V or GND U/D Conditions Min Typ Max Units V �A
Notes: (1) Stresses above 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 outside of those listed in the operational sections of this specification is not implied. Exposure to any absolute maximum rating for extended periods may affect device performance and reliability. This parameter is tested initially and after a design or process change that affects the parameter. Latch-up protection is provided for stresses 100mA on address and data pins from -1V to VCC IW = source or sink These parameters are periodically sampled and are not 100% tested.