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PDF ( 数据手册 , 数据表 ) RV1805C3

零件编号 RV1805C3
描述 Real Time Clock
制造商 Golledge
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RV1805C3 数据手册, 描述, 功能
Real Time Clock - I2C Bus
3.70
(typ)
2.50
(typ)
0.90
(max)
SOLDER PAD LAYOUT
0.80
0.60
15
10 6
3.00
0.80
0.30 0.50 0.80
TOP VIEW
PAD CONNECTION
1 Supply (VDD)
2 Capacitor RC-oscillator
3 Clock/Interrupt (CLK/INT)
4 Serial clock input (SCL)
5 Serial data (SDA)
PAD CONNECTION
6 Ground (VSS)
7 Backup supply voltage
8 Power switch output (PSW)
9 Watchdog input (WDI)
10 Reset output (RST)
Features
Extremely low current consumption
Miniature package with integrated crystal
Trickle charger, power management & switch
Backup battery input (internal switchover)
Programmable alarm, timer and interrupt
Block Diagram
RV1805C3
Specifications
Parameters
Frequencies (programmable):
32.768kHz ~ 1/60Hz
Frequency tolerance @25°C:
±100ppm typ
Product
RV1805C3
Time accuracy:
±2ppm typ (0.17s/day) @ 25°C
Operating temperature range:
-40 to +85°C
Storage temperature range:
-55 to +125°C
Frequency / temp coefficient:
-0.035ppm/°C2 ±10%
Supply voltage (VDD):
I2C bus active 1.6 ~ 3.6V
Time-keeping mode 1.5 ~ 3.6V
Supply current (I2C, fscl=400kHz):
6μA typ (VDD=3.0V, )
1.5μA typ (VDD=1.7V)
Supply current (time-keeping VDD=3V):
60nA typ, 80nA max (32kHz XTL)
17nA typ, 25nA max (RC MODE)
22nA typ, 32nA max (RC AUTOCAL)
Ageing:
±3ppm max first year
Shock and vibration resistance:
±5ppm, 5,000g, 0.3ms, ½ sine
±5ppm, 20g, 10.0 ~ 2,000Hz
Soldering condition:
Reflow, 260°C, 20 sec max
Standard. Optional - Please specify required code(s) when ordering
Option
Codes
Ordering Information
Product name
eg: RV1805C3 ±25ppm -40+85°C
Option code X (eg RV1805C3/X) denotes a custom spec.
Available on T&R - 1k or 3k pcs per reel
Evaluation / development board &manual available on request
The I2C-Bus is a trademark of Philips Electronics NV
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. Thefactory
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.
Manufactured by Micro Crystal
Stocked &supplied by Golledge
Tel: +44 1460 256 100
14 Oct 2014
Fax: +44 1460 256 101
Web: www.golledge.com












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