EM Microelectronic V3021
The V3021 is a low power CMOS real time clock. 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). The V3021 has no busy states and there is no danger of a clock update while accessing.| Part No. | V3021 |
|---|---|
| Datasheet | V3021 Download |
| Manufacturer |  EM Microelectronic |
| Description | Ultra Low Power 1-Bit 32-kHz RTC |
| Buy | Stock & Price |
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. Data can also be transmitted over a conventional 3 wire serial interface having CLK, data I/O and strobe. Supply current is typically 800 nA at VDD = 3.0V. Battery operation is supported by complete functionality down to 2.0V. The oscillator is typically 0.3 ppm/V.APPLICATIONS
● Utility meters● Battery operated and portable equipment
● Consumer electronics
● White/brown goods
● Pay phones
● Cash registers
● Personal computers
● Programmable controller systems
● Data loggers Typical Operating Configuration
FEATURES
● Supply current typically 800 nA at 3V● 50 ns access time with 50 pF 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
● Inter...
