20-101-0709 Rabbit Semiconductor, 20-101-0709 Datasheet - Page 72

• Manufacturer Part Number: 20-101-0709
• Description: INTERFACE GRAPHIC DISPLAY OP6700
• Manufacturer: Rabbit Semiconductor

Specifications of 20-101-0709

• Module/board Type: Single Board Computer Module
• For Use With/related Products: OP6700
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 20-101-709; 20-101-709

C.2 Batteries and External Battery Connections
A battery board with a 1000 mA·h lithium coin cell provides power to the real-time clock
and SRAM when external power is removed from the circuit. This allows the Intellicom to
continue to keep track of time and preserves the SRAM memory contents.
Figure C-2 shows the battery-board circuit.
Alternatively, starting with the 175-0206 version of the Intellicom, there is provision to
add a soldered-in battery directly on the Intellicom board.
The drain on the battery is typically less than 20 µA when there is no external power
applied. The battery can last more than 5 years:
The drain on the battery is typically less than 4 µA when external power is applied. The
battery can last for its full shelf life:
Since the shelf life of the battery is 10 years, the battery can last for its full shelf life when
external power is applied to the Intellicom.
C.2.1 Battery-Backup Circuit
The battery-backup circuit serves two purposes:
• It reduces the battery voltage to the real-time clock, thereby reducing the current con-
• It ensures that current can flow only out of the battery to prevent charging the battery.
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sumed by the real-time clock and lengthening the battery life.
1000 mA·h
-------------------------- -
4 µA
Figure C-2. Intellicom Backup-Battery Board
1000 mA·h
-------------------------- -
=
20 µA
28.5 years (shelf life = 10 years).
=
5.7 years.
Intellicom (OP6600/OP6700)