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CAT5409YI-10 Datasheet(PDF) 1 Page - Catalyst Semiconductor |
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CAT5409YI-10 Datasheet(HTML) 1 Page - Catalyst Semiconductor |
1 / 16 page CAT5409 © Catalyst Semiconductor, Inc. 1 Doc. No. MD-2010 Rev. K Characteristics subject to change without notice Quad Digitally Programmable Potentiometers (DPP™) with 64 Taps and I²C Interface FEATURES Four linear taper digitally programmable potentiometers 64 resistor taps per potentiometer End to end resistance 2.5kΩ, 10kΩ, 50kΩ or 100kΩ I²C interface Low wiper resistance, typically 80Ω Four non-volatile wiper settings for each potentiometer Recall of saved wiper settings at power-up 2.5 to 6.0 volt operation Standby current less than 1µA 1,000,000 nonvolatile WRITE cycles 100 year nonvolatile memory data retention 24-lead SOIC and 24-lead TSSOP Write protection for data register For Ordering Information details, see page 15. PIN CONFIGURATION SOIC (W) TSSOP (Y) DESCRIPTION The CAT5409 is four Digitally Programmable Potentiometers (DPP™) integrated with control logic and 16 bytes of NVRAM memory. A separate 6-bit control register (WCR) independently controls the wiper tap position 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 wiper control register or any of the non-volatile data registers is via a I²C serial bus. 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 Write Protection (WP ¯¯¯) pin protects against inadvertent programming of the data register. The CAT5409 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. FUNCTIONAL DIAGRAM 2 23 RL0 RL3 322 RH0 RH3 124 VCC NC 4 RW0 RW3 21 A0 A2 520 NC 619 WP A1 SCL 8 17 RL1 RL2 916 A3 718 SDA RH1 RH2 10 15 RW1 RW2 11 14 GND NC 12 13 2 23 RL0 RL3 322 RH0 RH3 124 VCC 4 RW0 RW3 21 A0 A2 520 NC 619 WP A1 SCL 8 17 RL1 RL2 916 A3 718 SDA RH1 RH2 10 15 RW1 RW2 NC 11 14 GND NC 12 13 NONVOLATILE DATA REGISTERS CONTROL LOGIC WIPER CONTROL REGISTERS I²C BUS INTERFACE RW0 RW1 RW2 RW3 RL0 A0 A1 A2 A3 SCL SDA RL1 RL2 RL3 RH0 RH1 RH2 RH3 WP |
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