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V3021

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 i...

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SeekIC No. : 004539753 Detail

V3021: 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 `Seri...

V3021 Data Sheet

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Part Number:
V3021
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



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
`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
`On request extended temperature range, -40 to +125
`Packages DIP8 and SO8




Application

·Utility meters
·Battery operated and portable equipment
·Consumer electronics
·White/brown goods
·Pay phones
·Cash registers
·Personal computers
·Programmable controller systems
·Data loggers
·Automotive systems




Pinout

Connection Diagram




Specifications

Parameter
Symbol
Conditions
Maximum voltage at VDD
Minimun voltage at VDD
Maximum voltage at any signal pin
Minimum voltage at any signal pin
Maximum storage temperature
Minimum storage temperature
VDDmax
VDDmin
Vmax
Vmin
TSTOmax
TSTOmin
VSS + 7.0V
VSS - 0.3V
VDD + 0.3V
VSS - 0.3V
+150
-65
Electrostatic discharge maximum to
MIL-STD-883C method 3015.7 with ref. to VSS
VSmax
1000V
Maximum soldering conditions
TSmax
250*10s

Stresses above these listed maximum ratings may cause permanent damages to the device. Exposure beyond
specified operating conditions may affect device reliability or cause malfunction.




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.





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