Datasheet

Real Time Clock - Low Power
RV2123C2
Specifications
Product
Parameters
RV2123C2
Frequencies (programmable):
32.768kHz ~ 1Hz

±10ppm
±20ppm
Other



Turnover temperature (T0):
+25°C ±5°C

Frequency / temp coefficient:
-0.035ppm/°C2 ±10%

Operating temperature range:
-40 to +85°C

Storage temperature range:
-55 to +125°C

Supply voltage (VDD):
SPI bus active 1.6 ~ 5.5V
Timekeeping mode 1.1 ~ 5.5V


Supply current (during access):
30/80μA typ/max (fscl=1MHz VDD=3V)
250/400μA typ/max (fscl=4.5MHz VDD=3V)




±3ppm max first year

Shock and vibration resistance:
±5ppm, 5,000g, 0.3ms, ½ sine
±5ppm, 20g, 10.0 ~ 2,000Hz


Features
Soldering condition:
Reflow, 260°C, 20 sec max






 Standard.  Optional - Please specify required code(s) when ordering
Frequency tolerance:
5.20
(max)
3.40
(max)
1.20
(max)
SOLDER PAD LAYOUT
0.90
1.00
10
6
1
5
0.40
2.20
0.60
1.00
TOP VIEW
PAD
CONNECTION
PAD
CONNECTION
1
Supply (VDD)
6
Ground (VSS)
Supply current (time-keeping):
130/180nA typ/max (fscl=0Hz, VDD=3V)
110/160nA typ/max (fscl=0Hz, VDD=1V)
2
Frequency output (CLKOUT)
7
Chip enable (CE)
Ageing:
3
Serial clock input (SCL)
8
Interrupt output (/INT)
4
Serial data in (SDI)
9
Not connected
5
Serial data out (SDO)
10
CLK output enable (CLKOE)
Ultra low power consumption
Option
Codes
A
B
specify
Compliant with 4-wire SPI-Bus
Ordering Information
Time keeping mode down to 1.1 V
Product + option code
eg: RV2123C2/B ±20ppm
Option code X (eg RV2123C2/X) denotes a custom spec.
Frequency-offset trimming register
Programmable alarm, timer and interrupt
 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 @ VDD 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: [email protected]
Web: www.golledge.com