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2. SPECIFICATIONS
Data storage:
Storage and recall of telephone, memo, schedule, reminder data; calendar display; secret area; editing;
memory status display.
Clock:
World time; reminder alarm; schedule alarm; daily alarm; accuracy under normal temperatures: ±3
seconds average.
Calculation:
10-digit arithmetic calculations; arithmetic constants (+, –, x, ÷); independent memory; percentages;
square roots; 20-digit approximations; date calculations; other mixed calculations.
General:
Display element: 16-column x 4-line LCD
Memory capacity: SF-4400: 32 KB (28579 bytes)
SF-4600B: 64 KB (61347 bytes)
Main component: LSI
Power supply: 2 lithium batteries (CR2032)
Power consumption: 0.05W
Battery life:
Approximately 450 hours continuous operation in Telephone Directory
Approximately 380 hours repeating one minute of input and 10 minutes of display in Telephone
Directory
Approximately 12 months for memory backup
Auto power off: Approximately 6 minutes after last key operation
Operating temperature: 0°C ~ 40°C (32°F ~ 104°F)
Dimensions:
Unfolded: 10.6H x 141W x 159.5Dmm (
3
/8"H x 5
1
/2"W x 6
1
/4"D)
Folded: 12.4H x 141W x 82Dmm (
1
/2"H x 5
1
/2"W x 3
1
/4"D)
Weight: 98.2g (3.5 oz)
Current consumption:
Storage Capacity:
The 64K bytes memory capacity (32K bytes for SF-4400) includes a 61347 bytes user area (28579
bytes for SF-4400). The following shows examples of what this means for the storage of data in
each mode.
Telephone Directory:
Approximately 2920 (1360 for SF-4400), under the following conditions:
8-character name
10-character telephone number
Power switch TYP. [µA] MAX [µA]
OFF 5.15 10.0
ON 256 420
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