DS1846

www.maxim-ic.com DS1846 NV Tri-Potentiometer, Memory, and MicroMonitor PIN CONFIGURATION SDA SCL A0 WP NMI L0 W1 L1 L2 GND 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 FEATURES § Three linear taper potentiometers - Two 10kW, 100-position - One 100kW, 256-position 248 bytes of user EEPROM memory Monitors microprocessor power supply, voltage sense, and external override Access to data and potentiometer control through a 2-wire interface External write-protect (WP) pin to protect data and potentiometer settings Operates from a 5V supply Nonvolatile (NV) wiper storage Packaging: 20-pin TSSOP Programming temperature: 0ºC to +70ºC Industrial operating temperature: -40ºC to +85ºC § § § § § § § § § VCC IN PBRST RST RST H0 W0 H1 W2 H2 20-Pin TSSOP PIN DESCRIPTION VCC GND SDA – Power-Supply Input – Ground – 2-Wire Serial Data Input/Output SCL – 2-Wire Serial Clock Input WP – Write-Protect Input A0 – Address Input H0, H1, H2 – High End of Potentiometer L0, L1, L2 – Low End of Potentiometer W0, W1, W2 – Wiper Terminal of Potentiometer PBRST – Pushbutton Reset Input NMI – Nonmaskable Interrupt Output IN – NMI Voltage Input RST ORDERING INFORMATION DS1846E-010 DS1846E-010/T&R (Tape-and-Reel Version) RST – Active-Low Reset Output – Active-High Reset Output OVERVIEW The DS1846 NV tri-potentiometer, memory, and MicroMonitor™ consists of two 10kW, 100-position linear taper potentiometers, one 100kW, 256-position linear taper potentiometer; 256 bytes of EEPROM memory; and a Micr...