Datasheet > V3025

V3025

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
EMMICRO		电池开关
页数	文件大小	规格书
17页	748K
描述
17Very Low Power 8-Bit 32 kHz RTC Module with Digital Trimming, User RAM and Battery Switch-over

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V3025 数据手册

EM MICROELECTRONIC - MARIN SA

V3025

Very Low Power 8-Bit 32 kHz RTC Module with Digital

Trimming, User RAM and Battery Switch-over

Description

Features

ꢀ Built-in quartz with digital trimming and

temperature compensation facilities

The V3025 is a low power CMOS real time clock with an

integrated battery switch-over. The standby current is

typically 2.5 µA and the access time is 50 ns. The

interface is a multiplexed address and data 8 bits bus.

Multiplexing of address and data is handled by the input

ꢀ INTEL and MOTOROLA interface compatibility

ꢀ 15 ns typical access time at 5.0V

ꢀ 1.2 µA typical standby current at 3.0V

ꢀ Wide supply voltage range, 2.0 ≤ V_DD≤ 5.5V

ꢀ Integrated battery switch-over

ꢀ Battery voltage range, 2.0 ≤ V_BAT≤ 4.0V

ꢀ No busy state

line A /D. There are no busy flags in the V3025, internal

time update cycles are invisible to the user's software.

Time data can be read from the V3025 in 12 or 24 hour

data formats. An external signal puts the V3025 in

standby mode. Even in standby, the V3025 pulls the IRQ

pin active low on an internal alarm interrupt. Calendar

functions include leap year correction and week number

calculation. The V3025 can be synchronized to an

external 50 Hz signal or to the nearest second or minute.

The integrated battery switch-over supply the real time

ꢀ No external components required

ꢀ BCD format

ꢀ Frequency measurements

ꢀ Time set lock mode

ꢀ Week number calculation

clock part by V_DDas long as V_DDis higher than V_BAT

ꢀ Clock counts up to 99 years

When V_DDdecreases under V_BAT, the output PFO comes

active and the real clock is supplied by the battery or the

supercap.

ꢀ Leap year correction

ꢀ 12 or 24 hour data format

ꢀ Output programmable interrupts

ꢀ Alarm interrupt, programmable up to one month

ꢀ Timer interrupt, programmable up to 24 hours

ꢀ Time to 1/100 of a second

Applications

ꢀ Industrial controllers

ꢀ Alarm systems with periodic wake up

ꢀ PABX and telephone systems

ꢀ Point of sale terminals

ꢀ Automotive electronics

ꢀ Personal computers

ꢀ To external time reference synchronisation

ꢀ 50 Hz or nearest s/min synchronisation

ꢀ Power fail input PFI

ꢀ Power fail output or Reset output PFO

ꢀ Tri-state bus capability when power fail (PFI = 0)

ꢀ User RAM

ꢀ Temperature range -40 to +85°C

ꢀ Package SO28

Typical Operating Configuration

Pin Assignment

SO28

V_BAT

AD7

AD6

AD5

AD4

SYNC

PFI

AD0

AD1

AD2

AD3

A/D

IRQ

V_OUT

V_SS

V3025

PFO

V_DD

V_SS

Fig. 2

Fig. 1

www.emmicroelectronic.com

12 3 4 5 6 7...17

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