DS12C887

Les images sont à titre de référence seulement

DS12C887

IC RTC CLK/CALENDAR PAR 24EDIP

  • Fabricant
  • Mfr. Partie #DS12C887
  • Paquet
  • Fiche de données
  • En stock7682

100% original & Nouveau

24 heures prêtes à expédier

Garantie 365 jours

RFQ et Obtenez plus de rabais

Spécifications

Part Status Obsolete
DigiKey Programmable Not Verified
Type Clock/Calendar
Features Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output
Memory Size 113B
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 Through Hole
Package / Case 24-DIP Module (0.600", 15.24mm)
Supplier Device Package 24-EDIP
Base Product Number DS12C887

Vue d'ensemble

Description

DS12C887 is a Dallas Semiconductor (now Maxim) CMOS Real-Time Clock/Calendar IC for embedded systems. It keeps time and date, even when main power is off, via a battery-backed domain (often with a trickle-charge option). It uses a serial interface (I2C-like) to read/write time, date, control and status registers. Key features include:
- Timekeeping and calendar (seconds, minutes, hours, day of week, date, month, year) with 12/24-hour support and BCD data.
- Optional battery-backed RAM for small data storage.
- Alarm and periodic interrupt outputs to wake or trigger events.
- Requires a 32.768 kHz oscillator input.
- Suitable as a drop-in RTC for microcontrollers, SBCs, and portable/embedded electronics.
Applications include time stamping, scheduling, data logging, and other time-sensitive tasks. Check the exact variant for RAM size and interface details to ensure compatibility with your MCU’s driver.

Features

DS12C887 features (RTC with battery-backed RAM and 2‑wire interface):
- I2C-like two‑wire serial interface for easy microcontroller communication.
- Real‑time clock/calendar: time (seconds, minutes, hours), day of week, date, month, year; supports 12/24‑hour modes and leap-year correction; century flag.
- Two independent alarm functions with programmable masks.
- Interrupt/square‑wave output: programmable square‑wave or alarm interrupt output.
- 32.768 kHz crystal oscillator input for timekeeping accuracy.
- Battery-backed operation: maintains time and RAM contents on power loss; power‑fail detect with automatic switchover.
- On‑chip nonvolatile RAM for user data retention during battery backup.
- Low power consumption suitable for battery-powered systems.
- Available in common packages (e.g., DIP-28, SOIC).
Note: Specific RAM size, exact alarm modes, and square‑wave options vary by revision; consult the datasheet for exact register map and electrical characteristics.

Package

DS12C887 is a 28‑pin RTC IC. It’s commonly available in DIP‑28 (through‑hole) and SO‑28 (surface‑mount) packages.

Pinout

Pin count: 28 pins (DIP‑28/SO‑28).
Function: CMOS real-time clock/calendar with nonvolatile RAM (RTC/NVRAM) used to keep system time across power cycles and provide timekeeping (seconds, minutes, hours, date, month, year) plus related alarm/timer features.

Manufacturer

- Manufacturer: Dallas Semiconductor (DS).
- What kind of company: An American semiconductor company that designed and manufactured integrated circuits (memory, timing/real-time clocks, analog/mixed-signal ICs). It was acquired by Maxim Integrated (and is now part of the Analog Devices family).

Application

DS12C887 is a real-time clock/calendar with battery-backed RAM, used for reliable, low-power timekeeping and nonvolatile data storage. Common applications include:
- Embedded systems and microcontroller designs
- PCs/servers for system time, alarms, and wake-up
- Industrial automation for time stamping, scheduling, and data logging
- Data-logging meters and instrumentation
- Telecom/network equipment for event logging
- Consumer electronics and appliances needing calendar/alarm features
- Battery-backed backup timing in various devices

Equivalent

Equivalent parts to DS12C887 (RTC with NVRAM) include:
- Dallas/Maxim DS1287A / DS12887
- Intersil/Renesas ISL1208 / ISL1209
- STMicroelectronics M41T00 / M41T01 / M41T02
- NXP PCF8583 / PCF8563
- Microchip MCP7940N / MCP7941X
Note: not all are pin-compatible; choose by interface (I2C/SPI) and RAM size to match your design.

Expédition

Méthodes d'expéditionNous

offrir des services d'expédition mondiaux par DHL, FedEx, TNT, UPS ou tout autre expéditeur de votre choix.


Référence des frais d'expédition (DHL/FedEx):

DHL: Les frais d'expédition vont de 25 à 45 $ (0,5 kg), avec un délai de livraison estimé de 2 à 5 jours ouvrables.

FedEx: Les frais d'expédition varient de 25 à 40 $ (0,5 kg), avec un délai de livraison estimé de 3 à 7 jours ouvrables.

UPS: Les frais d'expédition vont de 25 à 45 $ (0,5 kg), avec un délai de livraison estimé de 3 à 7 jours ouvrables.

TNT: Les frais d'expédition varient de 25 à 65 $ (0,5 kg), avec un délai de livraison estimé de 3 à 7 jours ouvrables.

EMS: Les frais d'expédition varient de 30 à 50 $ (0,5 kg), avec un délai de livraison estimé de 7 à 15 jours ouvrables.

Courrier aérien enregistré: Le coût d'expédition est de 2 à 4 $ (0,1 kg), avec un délai de livraison estimé de 5 à 20 jours ouvrables.

Paiements

Payment Methods

Le terme de paiement est 100% prépayé.

Actuellement, nous n'acceptons que les méthodes de paiement ci-dessous:

1. PayPal

2. Carte de crédit/débit

3. Transfert bancaire

Similaire