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DS1216B, DS1216C, DS1216D, DS1216E, DS1216F, DS1216H

SmartWatch RAM DS1216B/C/D/H
SmartWatch ROM DS1216E/F

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Status Explanations for product status codes

Part Number Status
DS1216 Active: In Production.
DS1216B Active: In Production.
DS1216C Active: In Production.
DS1216D Active: In Production.
DS1216E Active: In Production.
DS1216F Active: In Production. See Ordering Information for details.
DS1216H Active: In Production.

Description

The DS1216 SmartWatch RAM and SmartWatch ROM sockets are 600-mil-wide DIP sockets with a built-in CMOS watch function, an NV RAM controller circuit, and an embedded lithium energy source. The sockets provide an NV RAM solution for memory sized from 2k x 8 to 512k x 8 with package sizes from 26 pins to 32 pins. When a socket is mated with a CMOS SRAM, it provides a complete solution to problems associated with memory volatility and uses a common energy source to maintain time and date. The SmartWatch ROM sockets use the embedded lithium source to maintain the time and date only. A key feature of the SmartWatch is that the watch function remains transparent to the RAM. The SmartWatch monitors VCC for an out-of-tolerance condition. When such a condition occurs, an internal lithium energy source is automatically switched on and write protection is unconditionally enabled to prevent loss of watch and RAM data.

Data Sheet

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This product contains lithium-metal batteries. See applicable regulations for transport requirements for batteries in equipment.

Key Features

  • Keeps Track of Hundredths of Seconds, Seconds, Minutes, Hours, Days, Date of the Month, Months, and Years
  • Converts Standard 2k x 8 Up to 512k x 8 CMOS Static RAMs into Nonvolatile Memory
  • Embedded Lithium Energy Cell Maintains Watch Information and Retains RAM Data
  • Watch Function is Transparent to RAM Operation
  • Automatic Leap Year Compensation Valid Up to 2100
  • Lithium Energy Source is Electrically Disconnected to Retain Freshness Until Power is Applied for the First Time
  • Proven Gas-Tight Socket Contacts
  • Full ±10% Operating Range
  • Accuracy Better Than ±1 Minute/Month at +25°C
  • 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 VSUPPLY
(V)
Oper. Temp.
(°C)
Budgetary
Price
See Notes
DS1216B  Yes Yes No No 1 5 0 to +70 $19.94 @1k
DS1216C  $19.94 @1k
DS1216D  $19.94 @1k
DS1216H  $24.55 @1k
See All Non-Volatile RAM Controllers (11)

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 and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


Timekeeping & Real-Time Clocks
Part Number Interface VSUPPLY
(V)
Memory Type Memory Size
(Bytes)
Time of Day Alarms Budgetary
Price
See Notes
DS1216B 
Bytewide
Phantom Clock
5 External RAM
2K
8K
0 $19.94 @1k
DS1216C  External RAM
8K
32K
$19.94 @1k
DS1216D  External RAM
8K
32K
$19.94 @1k
DS1216E  External ROM
8K
32K
$19.94 @1k
DS1216F  External ROM
8K
32K
128K
$21.48 @1k
DS1216H  External RAM 512K $24.55 @1k
See All Timekeeping & Real-Time Clocks (90)

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 and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.



Diagram

DS1216, DS1216B, DS1216C, DS1216D,
DS1216E, DS1216F, DS1216H: Typical Operating Circuit
Typical Operating Circuit

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Overview

 

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Ordering Info

 

Related Products

 
Description
Key Features
Applications/Uses
Key Specifications
Diagram
Notes and Comments
  Data Sheet
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Samples
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Document Ref.: 19-6075 Rev 2; 2012-01-03
This page last modified: 2013-12-02