This website uses cookies. By using this site, you consent to the use of cookies. For more information, please take a look at our Privacy Policy.

Images are for reference only,

See Technical Specifications

DS12885+

Real Time Clock (RTC) IC Clock/Calendar 114B Parallel 24-DIP (0.600", 15.24mm)

Manufacturer:

Maxim Integrated
Mfr.Part #:

DS12885+
Datasheet:

DS12885+ Datasheet (PDF)
packingQty:

Tube,16
packingOption:

Tube
tempRange:

0 to 70C
Mounting Style:

Through Hole
EDA/CAD Models:

Request Free CAD Models for DS12885+

Email: [email protected]

Skype: live:.cid.ab6b29428937b76

Tel: +852 95804164

DS12885+ General Description

The DS12885, DS12887, and DS12C887 real-time clocks (RTCs) are designed to be direct replacements for the DS1285 and DS1287. The devices provide a real-time clock/calendar, one time-of-day alarm, three maskable interrupts with a common interrupt output, a programmable square wave, and 114 bytes of battery-backed static RAM (113 bytes in the DS12C887 and DS12C887A). The DS12887 integrates a quartz crystal and lithium energy source into a 24-pin encapsulated DIP package. The DS12C887 adds a century byte at address 32h. For all devices, the date at the end of the month is automatically adjusted for months with fewer than 31 days, including correction for leap years. The devices also operate in either 24-hour or 12-hour format with an AM/PM indicator. A precision temperature-compensated circuit monitors the status of V_CC. If a primary power failure is detected, the device automatically switches to a backup supply. A lithium coin-cell battery can be connected to the V_BAT input pin on the DS12885 to maintain time and date operation when primary power is absent. The device is accessed through a multiplexed byte-wide interface, which supports both Intel and Motorola modes.

Key Features

Drop-In Replacement for IBM AT Computer Clock/Calendar
RTC Counts Seconds, Minutes, Hours, Day, Date, Month, and Year with Leap Year Compensation Through 2099
Binary or BCD Time Representation
12-Hour or 24-Hour Clock with AM and PM in 12-Hour Mode
Daylight Saving Time Option
Selectable Intel or Motorola Bus Timing
Interfaced with Software as 128 RAM Locations
14 Bytes of Clock and Control Registers
114 Bytes of General-Purpose, Battery-Backed RAM (113 Bytes in the DS12C887 and DS12C887A)
RAM Clear Function (DS12885, DS12887A, and DS12C887A)
Interrupt Output with Three Independently Maskable Interrupt Flags
Time-of-Day Alarm Once Per Second to Once Per Day
Periodic Rates from 122µs to 500ms
End-of-Clock Update Cycle Flag
Programmable Square-Wave Output
Automatic Power-Fail Detect and Switch Circuitry
Optional 28-Pin PLCC Surface Mount Package or 32-Pin TQFP (DS12885)
Optional Encapsulated DIP (EDIP) Package with Integrated Crystal and Battery (DS12887, DS12887A, DS12C887, DS12C887A)
Optional Industrial Temperature Range Available

Application

Embedded Systems
Network Hubs, Bridges, and Routers
Security Systems
Utility Meters

Specifications

model	DS12885+	packingQty	Tube,16
packingOption	Tube	lifeCycle	production
tempRange	0 to 70C	Product Category	Real Time Clock
Mounting Style	Through Hole	RTC Bus Interface	Multiplexed
Date Format	YY-MM-DD-dd	Time Format	HH:MM:SS (12 hr, 24 hr)
Battery Backup Switching	Backup Switching	RTC Memory Size	114 B
Supply Voltage - Max	5.5 V	Supply Voltage - Min	4.5 V
Minimum Operating Temperature	0 C	Maximum Operating Temperature	+ 70 C
Function	Alarm, Calendar, Clock	Operating Supply Current	15 mA
Product Type	Real Time Clocks	Series	DS12885
Factory Pack Quantity	16	Subcategory	Clock & Timer ICs
Part # Aliases	DS12885 90-12885+000	Unit Weight	0.131925 oz