Data Sheet

EURO QUARTZ
ERV-4162
2
Real Time Clock Module with I C Bus
FEATURES
Ultra-small ceramic package
Integrated 32.768kHz crystal
I2C Interface, address: D0h
Frequency-offset Trimming Register
Programmable Alarm and Interrupt
Oscillator Fail Detection
Watchdog Timer
Programmbale Clock Output
Time-keeping Mode down to 1.0V
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OUTLINE & DIMENSIONS
DESCRIPTION
This very small SMD-packaged RTC module combines a 32.768kHz
crystal with a CMOS-based oscillator and real-time clock circuitry. The
clock function provides tenths/hundredths of seconds, seconds,
minutes and hours. The calendar function tracks date, month, year
and century with autimatic leap year compensation. Programmable
CLKOUT frequencies, alarm settings and watchdog function increase
flexibility.
The parts are available on 12mm tape and 178mm (7") reel with
either 1000 or 3000 pieces per reel.
BLOCK DIAGRAM
PAD CONNECTIONS (Top view)
EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE
Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 [email protected] www.euroquartz.co.uk
EURO QUARTZ
ERV-4162
2
Real Time Clock Module with I C Bus
Page 2 of 2
SPECIFICATION (at 25°C)
Symbol
Condition
Min.
Supply Voltage
VDD
I2C Bus Active
Supply Voltage
VDD
Timekeeping
Current consumption
during access
IDD
Current consumption
Timekeeping mode
IDDO
Typ.
Max.
Unit
1.3
4.4
V
1
4.4
V
fsci=400 kHz VDD 3V
35
µA
fsci=400 kHz VDD 2V
20
µA
fsci=0 Hz VDD 3V
350
500
nA
fsci=0 Hz VDD 2V
270
400
nA
CLKOUT frequency
PROGRAMMABLE
32.768 . . . to . . . 1
Hz
Frequency tolerance
∆F/F
@25°C
±20
ppm
Ageing first year
∆F/F
@25°C
±3
ppm
Frequency vs. temp.
∆F/FO
20 ≤ TO ≤ 30
-0.035ppm/°C(T-TO)2±10%
ppm
ENVIRONMENTAL
Symbol
Storage temp. range
Conditions
Max. Dev.
-55 to +125°C
TA Operating temp. range
-40 to +85°
Shock resistance
∆F/F
5000g. 0.3ms ½ sine
±5ppm
Vibration resistance
∆F/F
20g / 10~2000 Hz
±5ppm
TERMINATIONS & PROCESSING
Package Type
Termination
Processing
Ceramic 8-pin
Metal lid
For SMD mounting
AU plated pads
Reflow soldering
260°C / 20s max.
FREQUENCY/TEMPERATURE CHARACTERISTICS
EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE
Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 [email protected] www.euroquartz.co.uk
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