DS12885S+T&R by Analog Devices

Real-Time Clocks

Status: Active
Series: DS12885
RoHS: Unknown
View Datasheet Manufacturer Site View Pricing & Stock

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 VCC. 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 VBAT 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.

Prices starting from US$5.74


Distributor Starting From Stock
Logo for element14 element14 US$5.99
990
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Logo for Newark Electronics Newark Electronics US$6.62
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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

Specifications

Interface Multiplexed
VSUPPLY (V) 5
Date/ Time Format (hh = sec/100) YY-MM-DD/ HH:MM:SS
Time Keeping Current (nA) (typ) 225
CL (pF) 6
Memory Type NV SRAM
Memory Size (Bytes) 114
Time of Day Alarms 1
Package/Pins PDIP/24PLCC/28SOIC (W)/24TQFP/32
BudgetaryPrice (See Notes) 4.29


DS12885S+T&R Semiconductors - ICs by Analog Devices

RTC MULTIPLEXED 5.5V SOIC-24

Status: Unknown
Series: -
RoHS: Unknown
View Datasheet Manufacturer Site View Pricing & Stock

Specifications

Date Format Day
Clock Format HH
Clock IC Type RTC
Supply Voltage Min 4.5V
Supply Voltage Max 5.5V
Clock IC Case Style SOIC
No. of Pins 24Pins
IC Interface Type Bytewide
Operating Temperature Min 0°C
Operating Temperature Max 70°C
Product Range -
Automotive Qualification Standard -
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)

Alternative Descriptions

RTC, MULTIPLEXED, 5.5V, SOIC-24 | element14
Rtc, Multiplexed, 5.5V, Soic-24 | Newark Electronics

Frequently Asked Questions

Where can I find additional details, specifications and documents for a DS12885S+T&R ?

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Is the DS12885S+T&R RoHS compliant?

This part has not been flagged as RoHS Compliant.

Which authorised distributors for DS12885S+T&R have stock available?

Authorised distributors including element14, Farnell and Newark Electronics have stock available or on a lead time for DS12885S+T&R .

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