DS1216, DS1216B, DS1216C, DS1216D, DS1216E, DS1216F, DS1216H SmartWatch RAM DS1216B/C/D/HSmartWatch ROM DS1216E/F

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Status
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. But some versions of the family are No Longer Available. See Ordering Information.
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 V_CC 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.

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
Month and Year Determine the Number of Days in Each Month; 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
Operating Temperature Range: 0°C to +70°C
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

Reset Out

V_SUPPLY
(V)

Package/Pins

Smallest Available Pckg.
(mm²)

Oper. Temp.
(°C)

Price

max w/pins

See Notes

DS1216B

Yes

SCKT/28

SCKT/32

660

0 to +70

DS1216C

DS1216D

DS1216H

See All Non-Volatile RAM Controllers (13)

Key Specifications: Timekeeping & Real-Time Clocks

Part Number

Functions

Date/ Time Format

Interface

V_SUPPLY
(V)

Memory Type

Memory Size
(Bytes)

Time of Day Alarms

Price

hh = sec/100

See Notes

DS1216B

NV SRAM Control

YY-MM-DD/ HH:MM:SS:hh

Bytewide

Phantom Clock

External RAM

$13.64 @1k

DS1216C

NV SRAM Control

External RAM

32K

$13.64 @1k

DS1216D

NV SRAM Control

External RAM

32K

$14.96 @1k

DS1216E

ROM control

External ROM

32K

$13.64 @1k

DS1216F

ROM control

External ROM

32K

128K

$14.96 @1k

DS1216H

NV SRAM Control

External RAM

512K

$14.96 @1k

See All Timekeeping & Real-Time Clocks (80)

Diagram

Typical Operating Circuit

Application Notes

Application Note 52: Using the Dallas Phantom Real-Time Clocks (RTCs) - DS1216, DS1216E, DS1216F
Application Note 504: Design Considerations for Dallas Semiconductor Real-Time Clocks - DS1216
Application Note 505: Lithium Coin-Cell Batteries: Predicting an Application Lifetime - DS1216
Application Note 509: Using the SmartWatch/Phantom Clocks with a Microcontroller - DS1216

Design Guides

Real-Time Clocks (PDF)
System Timing & Control (PDF)

Reliability Reports

Request Reliability Report for:

Underwriters Laboratories (UL®) Recognized

Software/Models

none

Ordering Information

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
* 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: 1-7 of 7

DS1216B Notes Free
Sample Buy Status

Package: TYPE PINS FOOTPRINT

DRAWING CODE/VAR *

Temp RoHS/Lead-Free?
Materials Analysis

DS1216B 16k/64k RAM

Active SCKT;28 pin;660 mm²

Land Pattern: Not Available
Use pkgcode/variation: MDS28-1*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis

DS1216C Notes Free
Sample Buy Status

Package: TYPE PINS FOOTPRINT

DRAWING CODE/VAR *

Temp RoHS/Lead-Free?
Materials Analysis

DS1216C 64k/256k RAM

Active SCKT;28 pin;660 mm²

Land Pattern: Not Available
Use pkgcode/variation: MDS28-1*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis

DS1216D Notes Free
Sample Buy Status

Package: TYPE PINS FOOTPRINT

DRAWING CODE/VAR *

Temp RoHS/Lead-Free?
Materials Analysis

DS1216D 256k/1M RAM

Active SCKT;32 pin;752 mm²

Land Pattern: Not Available
Use pkgcode/variation: MDS32-1*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis

DS1216E Notes Free
Sample Buy Status

Package: TYPE PINS FOOTPRINT

DRAWING CODE/VAR *

Temp RoHS/Lead-Free?
Materials Analysis

DS1216E 64k/256k ROM

Active SCKT;28 pin;660 mm²

Land Pattern: Not Available
Use pkgcode/variation: MDS28-1*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis

DS1216F Notes Free
Sample Buy Status

Package: TYPE PINS FOOTPRINT

DRAWING CODE/VAR *

Temp RoHS/Lead-Free?
Materials Analysis

DS1216F 64k/256k/1M ROM, 5V

Active SCKT;32 pin;752 mm²

Land Pattern: Not Available
Use pkgcode/variation: MDS32-1*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis

DS1216F-3 N/A No Longer Available

Land Pattern: Not Available

0°C to +70°C See data sheet

DS1216H Notes Free
Sample Buy Status

Package: TYPE PINS FOOTPRINT

DRAWING CODE/VAR *

Temp RoHS/Lead-Free?
Materials Analysis

DS1216H 4M RAM, 5V

Active SCKT;32 pin;752 mm²

Land Pattern: Not Available
Use pkgcode/variation: MDS32-1*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis

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See All Non-Volatile RAM Controllers (16 Products)

See All Timekeeping & Real-Time Clocks (88 Products)

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2004-04-07
This page last modified: 2009-05-04