DS1216E

Series: -
Voltage - Supply: 4.5 V ~ 5.5 V
Operating Temperature: 0°C ~ 70°C
Packaging: Tube
Manufacturer: Maxim Integrated Products
Package / Case: 28-DIP (0.600", 15.24mm) Socket
Supplier Device Package: 28-DIP Socket
Controller Type: Smartwatch ROM


Features:

 Keeps track of hundredths of seconds, seconds, minutes, hours, days, date of the month, months, and years
Adds timekeeping to any 28-pin JEDEC bytewide memory location
Embedded lithium energy cell maintains calendar time for more than 10 years in the absence of power
Timekeeping function is transparent to memory 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 gastight socket contacts
Full ±10% VCC operating range
Operating temperature range 0°C to 70°C
Accuracy to within ±1 minute/month @ 25°C


Pinout




Specifications

Voltage on Any Pin Relative to Ground                            0.3V to +7.0V
Operating Temperature                                                   0°C to 70°C
Storage Temperature                                                      40°C to +70°C
Soldering Temperature                                                    260°C for 10 seconds (See Note 11)


Description

The DS1216E SmartWatch/ROM 64/256K is a 28pin, 600 milwide DIP socket with a builtin CMOS timekeeper function and an embedded lithium energy source to maintain time and date. DS1216E accepts any 28 pin bytewide ROM or volatile RAM. A key feature of the SmartWatch is that the timekeeper function remains transparent to the memory device placed above. The DS1216E monitors VCC for an outof tolerance condition. When such a condition occurs, an internal lithium energy source is automatically switched on to prevent loss of watch data.

Using the DS1216E saves PC board space since the combination of the DS1216E and the mated memory device takes up no more area than the memory alone. The SmartWatch uses pins 1, 8, 10, 11, 20, and 22 for timekeeper control. All pins pass through to the socket receptacle except for pin 20 (CE ), which is inhibited during the transfer of time information.

The DS1216E provides timekeeping information including hundredths of seconds, seconds, minutes, hours, days, date, month, and year information. The date at the end of the month is automatically adjusted for months with fewer than 31 days, including correction for leap years. The DS1216E operates in either 24hour or 12hour format with an AM/PM indicator.

Parameters:

Technical/Catalog Information	DS1216E
Vendor	Dallas Semiconductor
Category	Integrated Circuits (ICs)
Controller Type	Smartwatch ROM
Voltage - Supply	4.5 V ~ 5.5 V
Package / Case	28-DIP
Packaging	Tube
Operating Temperature	0°C ~ 70°C
Lead Free Status	Contains Lead
RoHS Status	RoHS Non-Compliant
Other Names	DS1216E DS1216E