RV-1805-C3
Extreme Low Power RTC Module
DIMENSIONS
Package:
Recommended Solder Pad:
3,70
0,8
0,8
0,8
3
4
5
10
9
8
7
6
1,4
0,8
3,0
2
0,5
2,50
1
0,8
0,8
0,3
0,6
0,8
max.0,9
0,1
3,70
100% leadfree, RoHS - compliant
Extreme Low Current consumption
XTAL-Mode 60nA
RC-Mode 17nA
RC Autocalibrated Mode 22nA
Factory calibrated Time accuracy
typ. ±2.0ppm @ 25°C
Miniature SMT ceramic package
with integrated Quartz Crystal for
best Noise & EMI Immunity
Automatic Battery Switchover,
Trickle Charger, Power Management
& Power Switch Function
Programmable CLKOUT frequencies
I2C Bus Interface (fast mode 400kHz)
Time keeping mode down to 1.5 V
Programmable Alarm, Timer and INT
512 Bytes of User RAM
All dimensions in mm typical
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. The
factory 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.
For pick-and-place equipment, the parts are available in 12 mm tape:
7” (178 mm) reel with 1'000 or 3'000 parts
BLOCK DIAGRAM:
Analog
Compare
VBACKUP
VDD
VSS
SCL
SDA
7
1
Power
Control
6
4
5
I2C-BUS
Interface
Calibration Engine
Cap_RC
CLK/ INT
WDI
RST
PSW
2
Xtal Osc
Divider
RC Osc
Divider
3
9
10
INPUT
OUTPUT
CONTROL
8
Reset
System Control
logic
Hundredths
Seconds
Minutes
Hours
Date
Month
Year
Weekday
Hundredths Alarm
Seconds Alarm
Minutes Alarm
Hours Alarm
Date Alarm
Months Alarm
Weekdays Alarm
Status
Control1
Control2
Interrupt Mask
SQW
Calibration XT
Sleep Control
Timer Control
Timer
Timer Initial
Watchdog Timer
Oscillator Control
Oscillator Status
Trickle Charge
BREF Control
Cap_RC Control
Batmode I/O
Analog Status
Output Control
Ext. RAM Addr.
User RAM
00
08
0F
10
14
17
1D
20
26
2F
3F
40
FF
ELECTRICAL CHARACTERISTICS
AT 25°C:
Symbol
Condition
Supply voltage
VDD
Time keeping
1.5
Supply voltage
VDD
Startup Voltage
1.6
Current consumption
Time Keeping Mode
IDD
Current consumption
I2C fSCL = 400 kHz
ICOM
Time accuracy
Δt/t
CLKOUT frequency
TERMINATIONS AND
PROCESSING:
3.6
V
3.6
V
32 kHz XTAL VDD 3 V
60
80
nA
RC-Mode
VDD 3 V
17
25
nA
RC-AutoCal VDD 3 V
22
32
nA
pull-up 2.2k VDD 3.0 V
6
µA
pull-up 2.2k VDD 1.7 V
1.5
µA
@ 25°C
±2.0
ppm
Programmable
32768...to...1/60
Hz
±100
ppm
Frequency tolerance
ΔF/F
32768Hz @25°C
Aging first year max.
ΔF/F
@ 25°C
Frequency vs. temp.
ΔF/FO
20 ≤ T0 ≤ 30
±3
ENVIRONMENTAL
CHARACTERISTICS:
Min. Typ. Max Unit
–0.035
ppm/
°C² (T
ppm
)2
- T0 ±10%
Conditions
Storage temp. range
–55 to +125°C
TA Operating temperature range
–40 to +85°C
ppm
Max. Dev.
Shock resistance
ΔF/F 5000 g, 0.3 ms, ½ sine +/-5 ppm
Vibration resistance
ΔF/F
20 g / 10–2000 Hz
+/-5 ppm
Package-Type
Termination
Processing
SON 10-pin
For SMD mounting
Au plated pads
Reflow soldering
260°C / 20 s max.
CURRENT CONSUMPTION vs.
80
POWER SUPPLY VOLTAGE:
70
TA = 25°C
XTAL Oscillator Mode
60
50
IDD [nA]
40
30
RC Autocalibration Mode
20
10
0
PIN CONNECTIONS
TOP VIEW:
RC Oscillator Mode
1.5
2.0
2.5
Product Marking
#10
#6
1805
#1
Pin 1 Index
3.0
VDD [V]
#5
3.5
Pin
Connection
1
VDD
Power Supply Voltage
2
Cap_RC
Capacitor RC-Oscillator
3
CLK/INT
Clock Output / Interrupt
4
SCL
Serial Clock Input
5
SDA
Serial Data
6
VSS
Ground
7
VBACKUP
Backup Supply Voltage
8
PSW
Power Switch Output
9
WDI
Watchdog Input
10
RST
Reset Output
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
sales@microcrystal.com
www.microcrystal.com
Version 1.3/04.2016