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Document Brief

Custom Silicon Solutions, Inc....

Micropower Timer...

GENERAL PART DESCRIPTION...

The CSS555 is a micropower version of the popular 555 timer IC. It features an operating current under 5 A 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 compensated to provide excellent stability over a wide ambient temperature range. A simple four-wire interface provides Read/Write access to the EEPROM....

Key Features...

Lowest power 555 timer (by > 10X)! Active mode current < 5 A 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 Pin-for-pin compatible with 555 series timers Monostable or Astable operation Extremely low transient switching current "Break-Before-Make" output driver Temperature stability 0.005% per C...

Pin Configuration...

GND TRIGGER OUTPUT RESET 1 2 3 4 8 7 6 5 V+ DISCHARGE THRESHOLD CONTROL V...

PDIP or SOIC Figure 1...

Typical Application Circuit...

Long Period Delay Generator...

Trigger Output Reset Operating conditions ...

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...

RA = RB = 4.7M, Internal counter = 106 (maximum) CT = 100pF, Delay = 16.3 minutes Average power = 7.5 W at VDD = 3.0V...

Ordering Information...

Part Number...

CSS555-ID CSS555-IS...

Package Description...

8 pin plastic DIP 8 pin plastic SOIC...

See page 9 for more details and options....

Custom Silicon Solutions Inc....

17951 Sky Park Circle, Suite F Irvine, CA 92614 (949) 797-9220 FAX (949) 797-9225 www.CustomSiliconSolutions.com...

Custom Silicon Solutions, Inc. 2009...

Version 1.1, May 2009...

Block Diagrams...

Standard 555 Timer Configuration (Std. Mode)...

(Programmable counter bypassed, Divider setting = 1)...

R1+R2+R3 6 M For VDD > 1.8V, VH = 2/3 x VDD, VL = 1/3 x VDD For VDD < 1.8V, VH = 0.9 x VDD, VL = 0.1 x VDD...

Comp + R Q Flip Flop S VL Comp + Q Res...

Document Keywords

Data Sheet (current) jameco products prod d s 2146433

About Jameco Electronic Components & Computer Products

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