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CAT5221JI-00TE13 Datasheet(PDF) 1 Page - Catalyst Semiconductor |
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CAT5221JI-00TE13 Datasheet(HTML) 1 Page - Catalyst Semiconductor |
1 / 16 page 1 DESCRIPTION The CAT5221 is two Digitally Programmable Potentiometers (DPPs™) integrated with control logic and 16 bytes of NVRAM memory. Each DPP consists of a series of 63 resistive elements connected between two externally accessible end points. The tap points between each resistive element are connected to the wiper outputs with CMOS switches. A separate 6-bit control register (WCR) independently controls the wiper tap switches for each DPP. Associated with each wiper control register are four 6-bit non-volatile memory data registers (DR) used for storing up to four wiper settings. Writing to the CAT5221 Dual Digitally Programmable Potentiometers (DPP™) with 64 Taps and 2-wire Interface FEATURES s Two linear-taper digitally programmable potentiometers s 64 resistor taps per potentiometer s End to end resistance 2.5k Ω, 10kΩ, 50kΩ or 100kΩ s Potentiometer control and memory access via 2-wire interface (I2C like) s Low wiper resistance, typically 80 Ω Ω Ω Ω Ω s Nonvolatile memory storage for up to four wiper settings for each potentiometer s Automatic recall of saved wiper settings at power up s 2.5 to 6.0 volt operation s Standby current less than 1 µA s 1,000,000 nonvolatile WRITE cycles s 100 year nonvolatile memory data retention s 20-lead SOIC and TSSOP packages s Industrial temperature ranges PIN CONFIGURATION FUNCTIONAL DIAGRAM © 2004 by Catalyst Semiconductor, Inc. Characteristics subject to change without notice Document No. 2113, Rev. I wiper control register or any of the non-volatile data registers is via a 2-wire serial bus (I2C-like). On power- up, the contents of the first data register (DR0) for each of the four potentiometers is automatically loaded into its respective wiper control register (WCR). The CAT5221 can be used as a potentiometer or as a two terminal, variable resistor. It is intended for circuit level or system level adjustments in a wide variety of applications. ALO GEN FR TM LEAD FREE W1 W0 H0 H1 R R L0 L1 R R WIPER CONTROL REGISTERS NONVOLATILE DATA REGISTERS 2-WIRE BUS INTERFACE CONTROL LOGIC SCL SDA A0 A1 A2 A3 R R 20 19 18 17 16 15 14 13 12 11 1 2 3 4 5 6 7 8 9 10 CAT 5221 RW0 RL0 RH0 A0 A2 RW1 RL1 RH1 SDA GND VCC NC NC NC A1 A3 SCL NC NC NC SOIC Package (J, W) TSSOP Package (U, Y) |
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