Epson RX-8564 Real Time Clock
How2 Info Sheet
Epson RX-8564 RTC Power Backup with EnerChip™ Battery
IP
ENERCH -D9C
0
CBC315
™
Applications
EnerChips are an attractive RTC backup alternative to batteries or supercapacitors, especially when the
finished product has limited PCB space, size constraints or needs to be sealed or installed in a hard-to-
reach location. They are also excellent if you have any of these design requirements:
•
•
•
•
•
Battery must be RoHS and WEEE compliant
Product can be discarded without removing battery
Product must have battery installed during shipping via air
Battery must be rechargeable to support a lifetime of power outages
Battery must provide backup power for several hours during a main power failure
Iq (nA at 3V)
275
Back up
time (hrs)
18
Package Size
(mm x mm)
4x5
Back up
time (hrs)
44
Package Size
(mm x mm)
7x7
Back up
time (hrs)
182
Package Size
(mm x mm)
9x9
Advantages of Combining These Two Parts
Cymbet EnerChips are solid-state, rechargeable batteries with
the following characteristics when compared to conventional
rechargeable batteries:
•
•
•
•
•
•
•
•
•
•
•
Low self-discharge
Are solder reflow tolerant
Flat discharge voltage profile
High charge/discharge cycle life
Simple voltage controlled charging
Have no flammable solvents to leak or catch fire
Are offered in low profile surface mount packages
System power
U1 EnerChip CBC31xx
VCHG
VBAT
VMODE
EN
VIN
C1
R1 1.0uF
10K
GND
CN
RESET
VOUT
GND
C3
1.0uF
U2 Epson RX-8564
10
VDD
INT
CLKOUT
CLKOE
SCL
6
GND
SDA
5
9
11
10
7
I2C SCL
I2C SDA
INT/
R3
100K
CP
C2
0.1uF
R2
10K
Documentation
Cymbet Application Note:
Cymbet Evaluation Kits:
Data Sheets:
All Cymbet Documents and Downloads:
Evaluation Kits
Cymbet EnerChip
Cymbet EnerChip
RTC CBC-EVAL-06
©2013 Cymbet Corporation • Tel: +1-763-633-1780 • www.cymbet.com
Cymbet, the Cymbet Logo and EnerChip are trademarks of Cymbet Corporation. All Rights Reserved
Doc MD-72-0XX Rev A
Page 1 of 1
CYMBET [ CYMBET CORPORATION ]
