V3020SO8A EMMICRO [EM Microelectronic - MARIN SA], V3020SO8A Datasheet

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V3020SO8A

Manufacturer Part Number
V3020SO8A
Description
Ultra Low Power 1-Bit 32 kHz RTC
Manufacturer
EMMICRO [EM Microelectronic - MARIN SA]
Datasheet

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Part Number
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Price
Part Number:
V3020SO8A
Manufacturer:
EM
Quantity:
8 000
Part Number:
V3020SO8A+
Quantity:
3 104
Description
The V3020 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 V3020
has no busy states and there is no danger of a clock
update while accessing.
390 nA at V
complete functionality down to 1.2V.
typically 0.3 ppm/V.
Applications
Typical Operating Configuration
Copyright © 2005, EM Microelectronic-Marin SA
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
DD
R
= 3.0V. Battery operation is supported by
EM MICROELECTRONIC -
Ultra Low Power 1-Bit 32 kHz RTC
CPU
Supply current is typically
WR
CS
RD
WR
CS
RD
I/O
Decoder
Address
V3020
RAM
The oscillator is
XO
XI
Fig. 1
Features
Pin Assignment
1
MARIN SA
Supply current typically 390 nA at 3V
50 ns access time with 50 pF load capacitance
Fully operational from 1.2V 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°C to +85°C
On request extended temperature range, -40°C to
+125°C
Pin compatible with the V3021
TSSO8 and SO8 packages
SO8
TSSO8
V
V
XO
WR
XO
CS
XI
SS
DD
XI
V3020
V3020
www.emmicroelectronic.com
V3020
RD
I/O
CS
RD
V
V
WR
I/O
SS
DD
Fig. 2

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V3020SO8A Summary of contents

Page 1

EM MICROELECTRONIC - R Ultra Low Power 1-Bit 32 kHz RTC Description The V3020 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 ...

Page 2

R Absolute Maximum Ratings Parameter Symbol Maximum voltage Minimun voltage Maximum voltage at any signal pin Minimum voltage at any signal pin Maximum storage T STOmax temperature Minimum storage temperature T Electrostatic ...

Page 3

R Electrical Characteristics (extended temperature range 5.0V ±10 and T =-40 to +125°C, unless otherwise specified Parameter Symbol Total static supply Total static supply Dynamic current Input / Output Input logic low ...

Page 4

R The V3020 will run slightly too fast, in order to allow the user to adjust the frequency, depending on the mean operating temperature. This is made since the crystal adjustment can only work by lowering the frequency with an ...

Page 5

R Typical Standby Current 5.5V DD Typical Standby Current 5.5V and Extended Temperature DD Copyright © 2005, EM Microelectronic-Marin SA 5 www.emmicroelectronic.com V3020 Fig. 4a Fig. 4b ...

Page 6

R Typical Frequency on I/O Pin Typical drift for ideal 32'768 Hz quartz Quartz Characteristics Copyright © 2005, EM Microelectronic-Marin SA Note : The trimming capacitor value must not exceed 15 pF. Greater values may disturb the oscillator function ∆ ...

Page 7

R Timing Characteristics (standard temperature range and T =-40 to +85°C, unless otherwise specified SS A Parameter Chip select duration RAM access time (note 1) Time between two transfers Rise time (note 2) Fall time (note 2) ...

Page 8

R Timing Waveforms Read Timing for Intel ( RD and WR Pulse) and Motorola ( DS (or RD pin tied and Write Timing for Intel ( RD and WR Pulse) Write Timing for Motorola ...

Page 9

R Communication Cycles Read Data Cycle for Intel ( RD and WR Pulse) Read Data Cycle for Motorola ( DS (or RD pin tied and Write Data Cycle for Intel ( RD and WR ...

Page 10

R Address Command Cycle for Intel ( RD and WR Pulse) Block Diagram Copyright © 2005, EM Microelectronic-Marin SA Address Command Cycle for Motorola ( DS (or RD pin tied and Fig ...

Page 11

R Pin Description Pin Name Function SO8 TSSO8 kHz crystal input kHz crystal output 3 5 Chip select input Ground supply I/O Data input and ...

Page 12

R Status Information The RAM addresses 0 and 1 contain status control data for the V3020. The function of each ibt (0 and 7) within address locations 0 and 1 is shown in Table 7a and 7b respectively. Status Word ...

Page 13

R Reading the Current Time and Date Send copy_clock_to_RAM addr. F hex Read time and data status bits, addr the seconds status bit set, addr. 1, bit 0 Yes Read seconds, addr the minutes status bit ...

Page 14

R Test Modes Addr. 0 Addr. 0 Function bit 3 bit Normal operation 0 1 All time keeping accelerated by 32 Parallel increment of all time data with no carry over Parallel ...

Page 15

R Typical Applications V3020 Interfaced with Intel CPU (RD/WR Pulse) V3020 Interfaced with Motorola CPU (Advanced R/W) 3 Wire Serial Interface 1) With strobe low bits are written to the V3020, and with strobe high bits are read from the ...

Page 16

R Battery Switch Over Circuit a) Ordering and Package Information Dimensions of 8-Pin SOIC Package 4 5 Dimensions of 8-Pin TSSOP Package Copyright © 2005, EM Microelectronic-Marin Dimensions in mm Min. A 1.35 3 ...

Page 17

... R Ordering Information When ordering, please specify the complete Part Number Part Number Temperature Range V3020SO8B V3020SO8A -40°C to +85°C V3020TP8B V3020TP8A V3020XSO8B V3020XSO8A -40°C to +125°C V3020XTP8B V3020XTP8A Where % and ## refer to the lot number and date (EM internal reference only). EM Microelectronic-Marin SA (EM) makes no warranty for the use of its products, other than those expressly contained in the Company's standard warranty which is detailed in EM's General Terms of Sale located on the Company's web site ...

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