Ultra Low Power 1-Bit 32 kHz RTC - EM Microelectronic
V3021- Real Time Clocks - IC
ULTRA LOW POWER 1-BIT 32KHZ RTC, 0.8UA STANDBY CURRENT, UP TO +125°C
General Description
The V3021 is a low power CMOS real time clock. Data is transmitted serially as 4 address bits and 8 data bits, over one line of a standard parallel data bus. The device is accessed by chip select (/CS) with read and write control timing provided by either /RD and /WR pulse (Intel CPU) or /DS with advanced R/W (Motorola CPU). Data can also be transmitted over a conventional 3 wire serial interface having CLK, data I/O and strobe. The V3021 has no busy states and there is no danger of a clock update while accessing. Supply current is typically 800nA at VDD = 3.0V. Battery operation is supported by complete functionality down to 2.0V. The oscillator stability is typically 0.3 ppm/V.
Solutions
Utility meters
Battery operated and portable equipment
Consumer electronics
White/brown goods
Pay phones
Cash registers
Personal computers
Programmable controller systems
Data loggers
Automotive electronics
Supply current typically 800nA at 3V
50ns access time with 50pF load capacitance
Fully operational from 2.0V to 5.5V
No busy states or danger of a clock update while accessing
Serial communication on one line of a standard parallel data bus or over a conventional 3 wire serial interface
Interface compatible with both Intel and Motorola
Seconds, minutes, hours, day of month, month, year, week day and week number in BCD format
Leap year and week number correction
Time set lock mode to prevent unauthorized setting of the current time or date
Oscillator stability 0.3 ppm/volt
No external capacitor needed
Frequency measurement and test modes
Temperature range - 40 to +85°C
On request extented temperature range -40 to +125°C
Packages DIP8 and SO8
V3021- Real Time Clocks - IC
ULTRA LOW POWER 1-BIT 32KHZ RTC, 0.8UA STANDBY CURRENT, UP TO +125°C
General Description
The V3021 is a low power CMOS real time clock. Data is transmitted serially as 4 address bits and 8 data bits, over one line of a standard parallel data bus. The device is accessed by chip select (/CS) with read and write control timing provided by either /RD and /WR pulse (Intel CPU) or /DS with advanced R/W (Motorola CPU). Data can also be transmitted over a conventional 3 wire serial interface having CLK, data I/O and strobe. The V3021 has no busy states and there is no danger of a clock update while accessing. Supply current is typically 800nA at VDD = 3.0V. Battery operation is supported by complete functionality down to 2.0V. The oscillator stability is typically 0.3 ppm/V.
Solutions
Utility meters
Battery operated and portable equipment
Consumer electronics
White/brown goods
Pay phones
Cash registers
Personal computers
Programmable controller systems
Data loggers
Automotive electronics
Supply current typically 800nA at 3V
50ns access time with 50pF load capacitance
Fully operational from 2.0V to 5.5V
No busy states or danger of a clock update while accessing
Serial communication on one line of a standard parallel data bus or over a conventional 3 wire serial interface
Interface compatible with both Intel and Motorola
Seconds, minutes, hours, day of month, month, year, week day and week number in BCD format
Leap year and week number correction
Time set lock mode to prevent unauthorized setting of the current time or date
Oscillator stability 0.3 ppm/volt
No external capacitor needed
Frequency measurement and test modes
Temperature range - 40 to +85°C
On request extented temperature range -40 to +125°C
Packages DIP8 and SO8
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