Real Time Clock - Low Power
Specifications
RV2123C2
Parameters
Frequencies (programmable):
32.768kHz ~ 1Hz
Frequency tolerance:
±10ppm
±20ppm
Other
Product
RV2123C2
A
B
specify
Option
Codes
5.20
(max)
Turnover temperature (T
0
):
+25°C ±5°C
Frequency / temp coefficient:
-0.035ppm/°C
2
±10%
3.40
(max)
Operating temperature range:
-40 to +85°C
Storage temperature range:
-55 to +125°C
SOLDER PAD LAYOUT
0.90
10
1
6
5
0.60
1.00
TOP VIEW
2.20
1.20
(max)
Supply voltage (V
DD
):
SPI bus active 1.6 ~ 5.5V
Timekeeping mode 1.1 ~ 5.5V
Supply current (during access):
30/80μA typ/max (fscl=1MHz V
DD
=3V)
250/400μA typ/max (fscl=4.5MHz V
DD
=3V)
Supply current (time-keeping):
130/180nA typ/max (fscl=0Hz, V
DD
=3V)
110/160nA typ/max (fscl=0Hz, V
DD
=1V)
Ageing:
±3ppm max first year
1.00
0.40
PAD
1
2
3
4
5
CONNECTION
Supply (VDD)
Frequency output (CLKOUT)
Serial clock input (SCL)
Serial data in (SDI)
Serial data out (SDO)
PAD
6
7
8
9
10
CONNECTION
Ground (VSS)
Chip enable (CE)
Interrupt output (/INT)
Not connected
CLK output enable (CLKOE)
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
Features
Ultra low power consumption
Compliant with 4-wire SPI-Bus
Time keeping mode down to 1.1 V
Frequency-offset trimming register
Programmable alarm, timer and interrupt
Standard.
Optional - Please specify required code(s) when ordering
Ordering Information
Product + option code
eg:
RV2123C2/B
±20ppm
Option code X (eg RV2123C2/X) denotes a custom spec.
Available on T&R - 1k or 5k pcs per reel
Evaluation / development board & manual available on request
Block Diagram
Description
This RTC IC has been specially designed to achieve an ultra-low power
consumption of typically 130nA @ V
DD
3.0V in time-keeping mode.
The very small SMT ceramic-package combines the 32.768 kHz crystal unit
with the CMOS-based oscillator and real-time-clock circuitry. The calendar
function tracks year, month, date, and day-of-the-week with built-in
century and leap-year flags. The clock function tracks minute and second
in 24-hour format. Programmable alarm setting and universal timer
functions increase flexibility.
Manufactured by Micro Crystal
Stocked & distributed by Golledge
Tel:
+44 1460 256 100
21 Nov 2012
Fax:
+44 1460 256 101
E-mail:
sales@golledge.com
Web:
www.golledge.com
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