Product Summary

The DS1216D SmartWatch RAM and SmartWatch ROM Socket is a 600mil-wide DIP socket with a built-in CMOS watch function, an NV RAM controller circuit, and an embedded lithium energy source. The DS1216D provides 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 DS1216D uses the embedded lithium source to maintain the time and date only. A key feature of the DS1216D 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.

Parametrics

DS1216D absolute maximum ratings: (1)Voltage Range on any Pin Relative to Ground: -0.3V to +7.0V for 5V; (2)Operating Temperature Range: 0℃ to +70℃; (3)Storage Temperature Range: -40℃ to +70℃.

Features

DS1216D features: (1)Keeps track of hundredths of seconds, seconds, minutes, hours, days, date of the month, months, and years; (2)Converts standard 2k x 8 up to 512k x 8 CMOS static RAMs into nonvolatile memory; (3)Embedded lithium energy cell maintains watch information and retains RAM data; (4)Watch function is transparent to RAM operation; (5)Month and year determine the number of days in each month; leap-year compensation valid up to 2100; (6)Lithium energy source is electrically disconnected to retain freshness until power is applied for the first time; (7)Proven gas-tight socket contacts; (8)Full ±10% operating range; (9)Operating temperature range: 0℃ to +70℃; (10)Accuracy is better than ±1 minute/month @ +25℃.

Diagrams

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
DS1216D
DS1216D

Maxim Integrated Products

Memory Controllers SmartWatch RAM

Data Sheet

0-1: $18.60
1-25: $14.61
25-50: $12.52
Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
DS12
DS12

Apem

DIP Switches / SIP Switches 12POS SPST 0.05A 24V

Data Sheet

0-1: $1.39
1-10: $1.24
10-25: $1.15
25-50: $1.03
DS1200
DS1200


IC SRAM 1KBIT 4MHZ 10DIP

Data Sheet

Negotiable 
DS1200-3
DS1200-3


POWER SUPPLY AC/DC 12V 1200W

Data Sheet

0-1: $232.27
1-10: $228.12
10-50: $220.65
DS1200-3-002
DS1200-3-002

Emerson / Astec Power

Linear and Switching Power Supplies 12V Out 1200W 1Ux2Ux11" w/5V Sby

Data Sheet

0-7: $284.41
7-10: $273.34
10-25: $260.71
DS1200DC-3
DS1200DC-3

Emerson / Astec Power

Linear and Switching Power Supplies 48V In 12VOut 1200W 1Ux2Ux11"

Data Sheet

0-7: $370.47
7-10: $356.03
DS1200HE-3
DS1200HE-3


POWER SUPPLY 12VOUT 1200W

Data Sheet

0-1: $239.90
1-10: $235.62
10-50: $227.91