CSS555C Datasheet | Custom Silicon Solutions

DESCRIPTION The CSS555C is a micropower version of the popular 555 timer IC. It features an operating current under 5µA and a minimum supply voltage of 1.2V, making it ideal for battery-operated applications. A six-decade programmable counter is included to allow generation of long timing delays. Configuration data for the counter is held in EEPROM to maintain the standard pin count of eight. The analog circuits are temperature pensated to provide excellent stability over a wide ambient temperature range. A simple four-wire interface provides Read/Write access to the EEPROM. The CSS555C device includes an internal precision timing capacitor (CTI). Its value is trimmed to 100p F ±1%. Key Features - Lowest power 555 timer (by > 10X)! Active mode current < 5 µA - Wide operating range Wide supply range: 1.2V to 5.5V Temperature range: -40°C to +85°C - Internal 6 decade, programmable counter Settings = 1, 10, 102, 103, 104, 105 & 106 Multiplies delay time by up to 106 Delay times from microseconds to days - Internal 100p F, ±1% Timing Capacitor User adjustable, 0.2p F resolution - Pin-for-pin patible with 555 series timers Monostable or Astable operation - Extremely low transient switching current “Break-Before-Make” output driver - Temperature stability - 0.005% per °C Applications - Portable & Battery-Powered Systems - Precision Timing & Pulse Generation - Ultra Long Period Delay Generation - Single Cell Battery Applications - Ultra Low Power Timers - Pulse Width Modulation - Low Cost, High Reliability Applications Pin Configuration GND TRIGGER OUTPUT RESET 1 2 3 4 8 V+ 7 DISCHARGE 6 THRESHOLD 5 CONTROL V PDIP or SOIC Figure 1 Typical Application Circuit Long Period Delay Generator Trigger Output Reset 18 27 36 45 Operating conditions: RA = RB = 4.7MΩ, Internal counter = 106 (maximum) CINT = 100p F, Delay = 16.3 minutes Average power = 7.5 µW at VDD = 3.0V Figure 2 Ordering Information Part Number Package Description CSS555C-I...