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DS12C887+
+NomenclatureIC RTC CLK/CALENDAR PAR 24-EDIP
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FabricantAnalog Equipment GmbH / intégration Maxim
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Pièce fabricant #DS12C887+
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Fiche technique DS12C887+ DataSheet
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Package EDIP-24
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En stock6713
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Spécifications
| Attribut | Valeur |
| Package / Case | Tape & Reel (TR),Cut Tape (CT) |
| Part Status | Active |
| Type | Clock/Calendar |
| Features | Alarm, Leap Year |
| Time Format | HH:MM:SS (12/24 hr) |
| Date Format | YY-MM-DD-dd |
| Interface | I²C, 2-Wire Serial |
| Voltage - Supply | 1.3V ~ 5.5V |
| Current - Timekeeping(Max) | 0.93µA ~ 1.1µA @ 3V ~ 5V |
| Operating Temperature | -40°C ~ 85°C |
| Mounting Type | Surface Mount |
| Voltage - Supply, Battery | 1.3V ~ 5.5V |
| Memory Size | 31B |
Présentation
Description
- Non-volatile operation: Built-in lithium battery maintains time/date for over 10 years.
- Timekeeping: Tracks seconds, minutes, hours, day, date, month, and year (including leap years up to 2100).
- Formats: Supports 12-hour (AM/PM) or 24-hour modes.
- Interrupts: Alarm, periodic, and update-ended interrupt outputs.
- Interface: Parallel (8-bit) bus compatible with microcontrollers.
- Temperature-compensated: Ensures accuracy over varying conditions.
Commonly used in embedded systems, industrial controls, and legacy PCs for reliable timekeeping. The "+" denotes an improved version with extended battery life and stability.
Equivalent
- DS12887+ (direct replacement)
- DS12885 (similar, no leap year correction)
- M48T86 (STMicroelectronics)
- MC146818 (older Motorola equivalent)
- PCF8583 (NXP, I²C interface)
These offer similar RTC functionality but may vary in features like interface type or package. Verify compatibility for your application.
Features
- Integrated Crystal & Battery: No external components needed for timekeeping.
- 128 Bytes of NV RAM: Stores time, date, and user data during power loss.
- Timekeeping Accuracy: Tracks seconds, minutes, hours, day, date, month, and year (including leap years up to 2100).
- Multiple Time Formats: Supports 12-hour (AM/PM) or 24-hour mode.
- Programmable Alarms & Interrupts: Configurable for periodic or time-based triggers.
- Binary or BCD Output: Flexible data representation.
- Low Power Consumption: Operates in battery mode when external power fails.
- Industrial Temperature Range: -40°C to +85°C.
- Parallel Interface: Easy integration with microcontrollers.
Ideal for embedded systems requiring reliable timekeeping without external RTC modules.
Pinout
- Timekeeping: Tracks seconds, minutes, hours, day, date, month, and year (with leap-year compensation).
- Battery Backup: Built-in lithium cell maintains timekeeping without external power.
- Clock Formats: Supports 12-hour or 24-hour modes.
- Alarms: Programmable interrupts for time/date alarms.
- Square Wave Output: Configurable frequency output (e.g., 1Hz, 32.768kHz).
- Interface: Parallel (8-bit data bus) with multiplexed address/data lines.
- Power Management: Operates from 4.5V to 5.5V, with automatic switch to battery backup.
Common applications include embedded systems, industrial controllers, and data loggers.
Application
1. Embedded Systems – Provides accurate timekeeping for microcontrollers.
2. Industrial Automation – Schedules tasks and logs timestamps.
3. Medical Devices – Tracks time-sensitive data.
4. Point-of-Sale (POS) Systems – Records transaction times.
5. Servers & Networking Equipment – Maintains system time during power loss.
6. Automotive Electronics – Manages timing for diagnostics and logging.
Its non-volatile memory and battery backup ensure continuous operation, making it ideal for applications requiring reliable timekeeping.
