ChipApex | Global Electronic Components Supplier
SEARCH
Search Product
Search Post
— IC芯片 | 连接器 | 传感器 | 被动器件 —
Consult the customer manager about the wholesale price.
consultation hotline：86-132-6715-2157
email：[email protected]
Contact the product manager for consultation. One-stop consultation is available.
Do you want a lower wholesale price? Please send us your inquiry and we will reply immediately.
Product Detailed Parameters
- Description：IC RTC CLK/CALENDAR PAR 28PLCC
- Series：-
- Package：Tube
- Mfr：Analog Devices Inc./Maxim Integrated
- Type：Clock/Calendar
- Features：Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output
- Memory Size：114B
- Time Format：HH:MM:SS (12/24 hr)
- Date Format：YY-MM-DD-dd
- Interface：Parallel
- Voltage - Supply：4.5V ~ 5.5V
- Voltage - Supply, Battery：2.5V ~ 4V
- Current - Timekeeping (Max)：15mA @ 4.5V ~ 5.5V
- Operating Temperature：0°C ~ 70°C
- Mounting Type：Surface Mount
- Grade：-
- Qualification：-
- Package / Case：28-LCC (J-Lead)
- Supplier Device Package：28-PLCC (11.51x11.51)
Download product information
Overview
The DS12885Q is a parallel interface real-time clock and calendar IC manufactured by Analog Devices Inc./Maxim Integrated. It provides timekeeping in HH:MM:SS (12/24-hour) format and date tracking in YY-MM-DD-dd format, including automatic leap year adjustments. The device integrates 114 bytes of battery-backed static RAM. Key features include one time-of-day alarm, three maskable interrupts with a common output, a programmable square wave, and daylight savings time support. It operates on a 4.5V to 5.5V supply with a maximum current consumption of 15mA at 5V. The component is housed in a 28-PLCC package.
Feature Summary
- Integrated 114-byte non-volatile SRAM for data storage
- Automatic calendar correction for month lengths and leap years
- Programmable square wave output and one time-of-day alarm
- Three maskable interrupts with a common interrupt output
Applications
- Industrial control systems requiring precise timekeeping
- Data logging equipment needing backup memory
- Telecommunications infrastructure monitoring
Procurement Notes
Verify the specific suffix 'Q' against the manufacturer's datasheet to confirm the industrial temperature range variant. Ensure the 28-LCC package footprint matches the target PCB design. Confirm RoHS compliance status as older Maxim variants may differ from current production standards.
Selection Notes
Select this part when a parallel interface RTC with integrated NVSRAM is required. Compare the 15mA active current draw against low-power alternatives if battery life is critical. Verify that the 4.5V to 5.5V logic levels are compatible with the host microcontroller system.
Part Context
The DS12885 series serves as a direct replacement for legacy DS1285 and DS1287 devices. It belongs to the broader family of Maxim Integrated real-time clocks designed for high-reliability applications. The Q suffix typically denotes an extended or industrial temperature grade compared to commercial variants.
Replacement Considerations
The DS12885+ is a lead-free version of the same functional device. Check pin compatibility and voltage specifications before substituting other RTC models.
