Status
Description
The DS1315 Phantom Time Chip is a combination of a CMOS timekeeper and a nonvolatile memory controller. In the absence of power, an external battery maintains the timekeeping operation and provides power for a CMOS static RAM. The watch keeps track of hundredths of seconds, seconds, minutes, hours, day, date, month, and year information. The last day of the month is automatically adjusted for months with less than 31 days, including leap year correction. The watch operates in one of two formats: a 12-hour mode with an AM/PM indicator or a 24-hour mode. The nonvolatile controller supplies all the necessary support circuitry to convert a CMOS RAM to a nonvolatile memory. The DS1315 can be interfaced with either RAM or ROM without leaving gaps in memory.
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Data Sheet
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Key Features
- Real-Time Clock Keeps Track of Hundredths of Seconds, Seconds, Minutes, Hours, Days, Date of the Month, Months, and Years
- Automatic Leap Year Correction Valid Up to 2100
- No Address Space Required to Communicate with RTC
- Provides Nonvolatile Controller Functions for Battery Backup of SRAM
- Supports Redundant Battery Attachment for High-Reliability Applications
- Full ±10% VCC Operating Range
- +3.3V or +5V Operation
- Industrial (–40°C to +85°C) Operating Temperature Ranges Available
- Underwriters Laboratories (UL) Recognized
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Key Specifications:
| Non-Volatile RAM Controllers |
| Part Number |
CE Cntrl. |
Smart Socket w/Int. Batt. |
Li Batt. Monitor |
Pwr. Fail Out |
RAMs Controlled |
VSUPPLY
(V) |
Package/Pins |
Smallest Available Pckg.
(mm2) |
Oper. Temp.
(°C) |
Budgetary Price |
| max w/pins |
See Notes |
| DS1315 |
Yes |
No |
No |
No |
1 |
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110.6 |
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$5.20 @1k |
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See All Non-Volatile RAM Controllers (13)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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| Timekeeping & Real-Time Clocks |
| Part Number |
Functions |
Date/ Time Format |
Interface |
VSUPPLY
(V) |
Time Keeping Current
(nA) |
CL
(pF) |
Memory Type |
Time of Day Alarms |
Integrated XTAL |
Budgetary Price |
| hh = sec/100 |
typ |
See Notes |
| DS1315 |
NV SRAM Control |
YY-MM-DD/ HH:MM:SS:hh |
Phantom Clock |
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400 |
6 |
None |
0 |
No |
$5.20 @1k |
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See All Timekeeping & Real-Time Clocks (86)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
Block Diagram
More Information
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Information Index
Document Ref.: 19-6080
Rev 6;
2012-01-03
This page last modified: 2012-01-03
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