RV-2251-C3

RV-2251-C3
Real Time Clock Module with I2C Bus
DIMENSIONS
Package:
Recommended Solder Pad:
3,70
1
2
0,3
0,55
4
5
3
0,8
0,8
0,8
0,8
0,8
0,8
0,7
3,0
0,5
11
10
9
8
7
0,8
1,25
0,7
6
0,55
2,50
0,8
12
max.0,9
0,1
0,5
100% leadfree, RoHS - compliant
Miniature SMT ceramic package
with integrated 32.768kHz Crystal
Automotive qualified, according to
AEC-Q200 Rev. C
Smart Backup Supply and Battery
Management System
3.0 V Regulated Output for ML rechargeable batteries
Level shifter for CPU interface
Two Alarm Interrupt circuits
Periodic Interrupt function
Very low power consumption
I2C Bus Interface (400 kHz)
Time keeping down to 0.7 V
4,2
All dimensions in mm typical
DESCRIPTION:
The RV-2251-C3 includes a Smart Backup Supply and Battery
Management System with Automatic Backup Switchover. A voltage
regulator output with VREG = 3.0 V is provided for ML rechargeable
batteries.
Additionaly, a level shifter with monitored power supply input VIO is
integrated for interfacing with CPU (I2C and CLKOUT).
The calendar function tracks Weekdays, Date, Month and Years with
automatic leap year calculation. The clock function tracks Seconds,
Minutes and Hours in 12 or 24 hour format. Two programmable Alarm
settings and a Periodic Interrupt function increase flexibility.
For pick-and-place equipment, the parts are available in 12 mm tape:
7” (178 mm) reel with 1'000 parts
7” (178 mm) reel with 3'000 parts
BLOCK DIAGRAM:
VOLTAGE
DETECTOR1
VDD
VREG
12
10
VOLTAGE
REGULATOR
SW1
VOUT
INTERNAL
POWER
SUPPLY
& POR
11
SW2
VBAT
VSS
ECO
9
BATTERY
MONITOR
7
4
XTAL
OSC
FREQUENCY DIVIDER
&
OFFSET COMPENSATION
VIO
VIOL
SCL
SDA
CLKOUT
INT
5
VOLTAGE
DETECTOR2
2
1
VIOL
CONTROL
6
3
8
2
LEVEL
SHIFTER
nINT
CONTROL
I2C-BUS
INTERFACE
SYSTEM
CONTROL
LOGIC
Seconds
Minutes
Hours
Weekdays
Date
Months
Years
Offset
Alarm_W Minutes
Alarm_W Hours
Alarm_W Weekday
Alarm_D Minutes
Alarm_D Hours
RAM
Control1
Control2
0
F
ELECTRICAL CHARACTERISTICS
AT 25°C:
Symbol
Peripheral voltage
Condition
I2C
VIO
Supply voltage
VOUT
Min. Typ. Max
Bus Active
1.8
Time keeping
0.7
5.5
5.5
Unit
V
V
fscl=400 kHz, 5V
20
μA
fscl=100 kHz, 3V
7
μA
VBAT 3 V, ECO off
270
380
nA
VBAT 3 V, ECO on
210
320
nA
Power current
during access
IRTC
Current consumption
Time keeping mode
IRTCO
CLKOUT frequency
FCLKOUT
Frequency tolerance
F/F
32768Hz@ 25°C
Aging first year max.
F/F
@ 25°C
Frequency vs. temp.
F/FO
20 ≤ T0 ≤ 30
32768
±20
Hz
1)
ppm
±3
–0.035
ppm
ppm
2
/°C² (T - T0) ±10%
ppm
1) Tighter and wider frequency tolerances on request.
ENVIRONMENTAL
CHARACTERISTICS:
Conditions
Storage temp. range
–55 to +125°C
TA Operating temperature range
–40 to +85°C
Max. Dev.
Shock resistance
F/F 5000 g, 0.3 ms, ½ sine
+/-5 ppm
Vibration resistance
F/F
+/-5 ppm
TERMINATIONS AND
PROCESSING:
20 g / 10–2000 Hz
Package-Type
Termination
Processing
SON 12-pin
For SMD mounting
Au plated pads
Reflow soldering
260°C / 20 s max.
FREQUENCY TEMPERATURE
CHARACTERISTICS:
20.0
0.0
-20.0
DF F ppm
-40.0
-60.0
-80.0
-100.0
-120.0
-140.0
-160.0
-180.0
-60
-40
-20
0
20
40
60
80
100
T °C
Tuning Fork Crystal
PIN CONNECTIONS
TOP VIEW:
Production Date Code
11
12
7
M530A1
2251
1
Pin 1 Index
5
Part Designation
6
Pin
1
2
3
4
5
6
7
8
9
10
11
12
Connection
VIO Monitoring Output
VIOL
INT
Interrupt Output
SDA
Serial Data
ECO
Oscillator Mode Select
VIO
Peripheral Supply
SCL
Serial Clock Input
Ground
VSS
CLKOUT 32.768 kHz Clock Output
VBAT
Backup Power Supply
VREG
Voltage Regulator Output
Internal Supply
VOUT
Main Power Supply
VDD
All specifications subject to change without notice.
Micro Crystal AG
Mühlestrasse 14
CH-2540 Grenchen
Switzerland
Tel.
+41 32 655 82 82
Fax
+41 32 655 82 83
[email protected]
www.microcrystal.com
Version 1.0/01.2016