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Maxim > Products > [Real-Time Clocks]  [Memories: Volatile, NV, Multi-Function] 
DS1315
Phantom Time Chip


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Status
Part Number Status
DS1315 Active: In Production. But some versions of the family are No Longer Available. See Ordering Information.

Data Sheet
FULL DATA SHEET (PDF, 324kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

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.

Key Features
  • Real-Time Clock Keeps Track of Hundredths of Seconds, Seconds, Minutes, Hours, Days, Date of the Month, Months, and Years
  • Adjusts for Months with Fewer than 31 Days
  • 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 (–45°C to +85°C) Operating Temperature Ranges Available
  • Drop-In Replacement for DS1215
  • Underwriters Laboratories (UL®) Recognized

Key Specifications:  Non-Volatile RAM Controllers
Part Number CE Cntrl. Smart Socket w/Int. Batt. Li Batt. Monitor Pwr. Fail Out RAMs Controlled Reset Out VSUPPLY
(V)		 Package/Pins Smallest Available Pckg.
(mm2)		 Oper. Temp.
(°C)		 Price
max w/pins See Notes
DS1315  Yes No No No 1 No
3.3
5
PDIP(N)/16
SOIC(W)/16
TSSOP/20
 110.6
-40 to +85
0 to +70
 $4.95 @1k
See All Non-Volatile RAM Controllers (13)

Key Specifications:  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 Price
hh = sec/100 typ See Notes
DS1315  NV SRAM Control YY-MM-DD/ HH:MM:SS:hh Phantom Clock
3.3
5
 400 6 None 0 $4.95 @1k
See All Timekeeping & Real-Time Clocks (80)

Diagram
DS1315: Block Diagram
Block Diagram

Application Notes
  		• Application Note 52: Using the Dallas Phantom Real-Time Clocks (RTCs) - DS1315
  		• Application Note 58: Crystal Considerations with Dallas Real-Time Clocks (RTCs) - DS1315
  		• Application Note 504: Design Considerations for Dallas Semiconductor Real-Time Clocks - DS1315
  		• Application Note 505: Lithium Coin-Cell Batteries: Predicting an Application Lifetime - DS1315
  		• Application Note 509: Using the SmartWatch/Phantom Clocks with a Microcontroller - DS1315
  		• Application Note 701: Using the DS32kHz with Dallas Real-Time Clocks - DS1315
  		• Application Note 3816: Selecting a Backup Source for Real-Time Clocks - DS1315

    Design Guides
  		• Real-Time Clocks (PDF)

    Reliability Reports
  		• Reliability Report: DS1315.pdf
  		• Underwriters Laboratories (UL®) Recognized

    Software/Models
    none

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-28 of 28

    DS1315 Free
    Sample    		 Buy Status Recommended Replacement
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    DS1315-33     N/A No Longer Available DS1315-33+
    		 PDIP(N);16 pin;158.4 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    DS1315N-33     N/A No Longer Available DS1315N-33+
    		 PDIP(N);16 pin;158.4 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1315N-5     N/A No Longer Available DS1315N-5+
    		 PDIP(N);16 pin;158.4 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1315-5    
    		Active
    		PDIP(N);16 pin;158.4 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    DS1315-33+  
    		Active
    		PDIP(N);16 pin;158.4 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1315-5+  
    		Active
    		PDIP(N);16 pin;158.4 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16+2*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1315N-33+    
    		Active
    		PDIP(N);16 pin;158.4 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1315N-5+    
    		Active
    		PDIP(N);16 pin;158.4 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1315S-33+T&R    
    		Active
    		SOIC(W);16 pin;110.6 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0107 (PDF)
    Use pkgcode/variation: W16+2*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1315S-33     N/A No Longer Available DS1315S-33+
    		 SOIC(W);16 pin;110.6 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0107 (PDF)
    Use pkgcode/variation: W16-2*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    DS1315S-5/T&R     N/A No Longer Available DS1315S-5+
    		 SOIC(W);16 pin;110.6 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0107 (PDF)
    Use pkgcode/variation: W16-2*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    DS1315SN-33     N/A No Longer Available DS1315SN-33+
    		 SOIC(W);16 pin;110.6 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0107 (PDF)
    Use pkgcode/variation: W16-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1315S-5    
    		Active
    		SOIC(W);16 pin;110.6 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0107 (PDF)
    Use pkgcode/variation: W16-2*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    DS1315S-33+  
    		Active
    		SOIC(W);16 pin;110.6 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0107 (PDF)
    Use pkgcode/variation: W16+2*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1315S-5+  
    		Active
    		SOIC(W);16 pin;110.6 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0107 (PDF)
    Use pkgcode/variation: W16+2*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1315S-5+T&R    
    		Active
    		SOIC(W);16 pin;110.6 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0107 (PDF)
    Use pkgcode/variation: W16+2*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1315SN-5    
    		Active
    		SOIC(W);16 pin;110.6 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0107 (PDF)
    Use pkgcode/variation: W16-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1315SN-33+    
    		Active
    		SOIC(W);16 pin;110.6 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0107 (PDF)
    Use pkgcode/variation: W16+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1315SN-5+    
    		Active
    		SOIC(W);16 pin;110.6 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0107 (PDF)
    Use pkgcode/variation: W16+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1315EN-5     N/A No Longer Available DS1315EN-5+
    		 TSSOP;20 pin;45.2 mm²
    Outline Drawing: 21-0066 (PDF)
    Land Pattern: 90-0116 (PDF)
    Use pkgcode/variation: U20-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1315E-33+  
    		Active
    		TSSOP;20 pin;45.2 mm²
    Outline Drawing: 21-0066 (PDF)
    Land Pattern: 90-0116 (PDF)
    Use pkgcode/variation: U20+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1315E-5+  
    		Active
    		TSSOP;20 pin;45.2 mm²
    Outline Drawing: 21-0066 (PDF)
    Land Pattern: 90-0116 (PDF)
    Use pkgcode/variation: U20+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1315EN-33    
    		Active
    		TSSOP;20 pin;45.2 mm²
    Outline Drawing: 21-0066 (PDF)
    Land Pattern: 90-0116 (PDF)
    Use pkgcode/variation: U20-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1315EN-33/T&R    
    		Active
    		TSSOP;20 pin;45.2 mm²
    Outline Drawing: 21-0066 (PDF)
    Land Pattern: 90-0116 (PDF)
    Use pkgcode/variation: U20-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1315EN-33+    
    		Active
    		TSSOP;20 pin;45.2 mm²
    Outline Drawing: 21-0066 (PDF)
    Land Pattern: 90-0116 (PDF)
    Use pkgcode/variation: U20+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1315EN-33+T&R    
    		Active
    		TSSOP;20 pin;45.2 mm²
    Outline Drawing: 21-0066 (PDF)
    Land Pattern: 90-0116 (PDF)
    Use pkgcode/variation: U20+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1315EN-5+    
    		Active
    		TSSOP;20 pin;45.2 mm²
    Outline Drawing: 21-0066 (PDF)
    Land Pattern: 90-0116 (PDF)
    Use pkgcode/variation: U20+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1315EN-5+T&R    
    		Active
    		TSSOP;20 pin;45.2 mm²
    Outline Drawing: 21-0066 (PDF)
    Land Pattern: 90-0116 (PDF)
    Use pkgcode/variation: U20+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    More Information
  		• New Product Press Release 2001-07-27 

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    2007-09-05
    This page last modified: 2009-10-23


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