RV-1805-C30 pages

RV-1805-C3
Extreme Low Power RTC Module
DIMENSIONS
Package:

Recommended Solder Pad:

3,70

0,8

0,8

0,8

3

4

5

10

9

8

7

6

1,4
0,8

3,0

2

0,5

2,50

1

0,8

0,8

0,3

0,6

0,8

max.0,9

0,1

3,70

100% leadfree, RoHS - compliant

Extreme Low Current consumption
XTAL-Mode 60nA
RC-Mode 17nA
RC Autocalibrated Mode 22nA
Factory calibrated Time accuracy
typ. ±2.0ppm @ 25°C
Miniature SMT ceramic package
with integrated Quartz Crystal for
best Noise & EMI Immunity
Automatic Battery Switchover,
Trickle Charger, Power Management
& Power Switch Function
Programmable CLKOUT frequencies
I2C Bus Interface (fast mode 400kHz)
Time keeping mode down to 1.5 V
Programmable Alarm, Timer and INT
512 Bytes of User RAM

All dimensions in mm typical

DESCRIPTION:
This RTC IC has been specially designed for ultimate low current
consumption of typically 60 nA @ VDD 3.0V for 32.768 kHz XTAL mode.
Additionally, there is an RC-Mode consuming only 17nA and an autocalibrated RC-mode consuming 22nA which permits to operate this RTC
module several hours at Backup Supply Voltage using low-cost MLCC.
The very small SMT ceramic-package combines the 32.768 kHz crystal
unit with the CMOS-based oscillator and real-time-clock IC.
The calender function track year, month, date, and day-of-the-week. The
factory calibrated clock achieves a time accuracy of typ. ±2.0 ppm @ 25°C
and tracks hundredths of second, second, minute and hour in AM/PM or
24-hour format. Additional features include Alarm, Timer and Interrupt
functions, Watchdog Timer, Power Management with Power-Switch,
Trickle Charger and Automatic Switchover to backup supply voltage.
For pick-and-place equipment, the parts are available in 12 mm tape:
7” (178 mm) reel with 1'000 or 3'000 parts
13” (330 mm) reel with 10'000 parts

BLOCK DIAGRAM:
Analog
Compare
VBACKUP
VDD
VSS

SCL
SDA

7
1

Power
Control

6

4
5

I2C-BUS
Interface

Calibration Engine
Xtal Osc
Cap_RC

2

Divider

RC Osc

Divider

3

CLK/ INT
WDI
RST
PSW

9
10

INPUT
OUTPUT
CONTROL

8

Reset

System Control
logic

Hundredths
Seconds
Minutes
Hours
Date
Month
Year
Weekday
Hundredths Alarm
Seconds Alarm
Minutes Alarm
Hours Alarm
Date Alarm
Months Alarm
Weekdays Alarm
Status
Control1
Control2
Interrupt Mask
SQW
Calibration XT
Sleep Control
Timer Control
Timer
Timer Initial
Watchdog Timer
Oscillator Control
Oscillator Status
Trickle Charge
BREF Control
Cap_RC Control
Batmode I/O
Analog Status
Output Control
Ext. RAM Addr.
User RAM

00

08

0F
10

14
17

1D
20
26
2F
3F
40
FF