DS1602

www. maxim-i c.com DS1602 Elapsed Time Counter www.maxim-ic.com FEATURES § Two 32-bit counters keep track of real-time and elapsed time § Counters keep track of seconds for over 125 PIN ASSIGNMENT RST 1 DQ 2 8 VCC 7 X1 years § Battery powered counter counts seconds from the time battery is attached until VBAT is less than 2.5V § VCC powered counter counts seconds while VCC is above VTP and retains the count in the absence of VCC under battery backup power § Clear function resets selected counter to 0 § Read/write serial port affords low pin count § Maximum current drain of less than 1 µA from VBAT pin when serial port is disabled § One byte protocol defines read/write, counter address and software clear function § 8-pin DIP or optional 8-pin SOIC § Operating temperature range of -40°C to +85°C § Reduced performance operation down to VCC = 2.5V § Underwriters Laboratory (UL) recognized CLK GND 3 4 6 X2 5 VBAT DS1602 8-Pin DIP (300mil) RST 1 DQ 2 8 VCC 7 X1 CLK 3 6 X2 GND 4 5 VBAT DS1602 8-Pin SOIC (208mil) Package Dimension Information www.maxim-ic.com/TechSupport/DallasPackInfo.htm PIN DESCRIPTION RST CLK - Reset - Clock DQ - Data Input/Output GND - Ground X1, X2 - Crystal Inputs DESCRIPTION VBAT VCC - + Battery Input - +5V The DS1602 is a real-time clock/elapsed time counter designed to count seconds when VCC power is applied and continually count seconds under battery backup power with an additional counter regardless of the condition of VCC...