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參數(shù)資料
| 型號： | V30218P |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Ultra Low Power 1-Bit 32 kHz RTC |
| 中文描述： | 超低功耗1位32 kHz的時鐘 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大小： | 442K |
| 代理商： | V30218P |
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 800
nA at V
= 3.0 V. Battery operation is supported by complete
DD
functionality down to 2.0 V. The oscillator stability is typically 0.3
ppm/V.
Applications
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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
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Features
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Supply current typically 800 nA at 3 V
50 ns access time with 50 pF load capacitance
Fully operational from 2.0 V to 5.5 V
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
Packages DIP8 and SO8
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Description
Ultra Low Power 1-Bit 32 kHz RTC
Typical Operating Configuration
W
R
I/O
A
D
XI
XO
WR
WR
RD
CS
RD
CPU
Address
Decoder
V3021
RAM
Fig. 1
Pin Assignment
XI
XO
CS
V
SS
DIP8 / SO8
V
DD
WR
RD
I/O
V3021
Fig. 2
EM MICROELECTRONIC-MARIN SA
R
V3021
相關(guān)PDF資料 |
PDF描述 |
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| V30218S | Ultra Low Power 1-Bit 32 kHz RTC |
| V302AS32 | High Energy Metal-Oxide Arrester Blocks |
| V31CP20 | Tubular Metal-Oxide Varistors |
| V320MTC | V320 8-Bit Registered Bus Transceiver |
| V320MTCX | Single 8-bit Bus Transceiver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| V30218S | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Ultra Low Power 1-Bit 32 kHz RTC |
| V3021DL8A | 制造商:EMMICRO 制造商全稱:EM Microelectronic - MARIN SA 功能描述:Ultra Low Power 1-Bit 32 kHz RTC |
| V3021SO8A | 制造商:EMMICRO 制造商全稱:EM Microelectronic - MARIN SA 功能描述:Ultra Low Power 1-Bit 32 kHz RTC |
| V3021SO8B | 制造商:EMMICRO 制造商全稱:EM Microelectronic - MARIN SA 功能描述:Ultra Low Power 1-Bit 32 kHz RTC |
| V3021XDL8A | 制造商:EMMICRO 制造商全稱:EM Microelectronic - MARIN SA 功能描述:Ultra Low Power 1-Bit 32 kHz RTC |
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