What is the Additional Feature ?

Name: DS12C887+
Brand: Analog Devices Inc./Maxim Integrated
SKU: DS12C887+
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Any Feature, including a modified Existing Feature, that is not an Existing Feature.

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Analog Devices Inc./Maxim Integrated DS12C887+

Part No.:: DS12C887+

Manufacturer:: Analog Devices Inc./Maxim Integrated

Package:: 24-DIP Module (0.600, 15.24mm)

Datasheet:: DS12C887+.pdf

Description:: IC RTC CLK/CALENDAR PAR 24-EDIP

In Stock:: 585

Quantity:: Add To Cart

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DS12C887+ Typical application Circuitry

DS12C887+ is a real-time clock (RTC) chip, which provides accurate time and date information for computers and other devices. It is an upgrade to the DS12887 chip, adding additional functionality, including a dual-power supply, an auto-recharge function, and a battery-backed non-volatile (NV) RAM.

Key Features and Specifications:

*RTC counts seconds, minutes, hours, days of the week, months, and years with leap-year compensation that is valid through 2100.

* 114x8 Bytes of Battery-Backed Nonvolatile (NV) RAM for Data Storage

* Two Time-of-Day Alarms

* Programmable Square-Wave Output Signal

* Auto-Recharge Denies Access to the RTC or RAM when VCC is Over the Backup Battery Voltage

* Totally Nonvolatile with Over 10 Years of Operation in the Absence of Power

Application Scenarios:

The DS12C887+ chip is frequently used in various applications such as digital cameras, GPS devices, data loggers, home automation systems, and especially computers, where it helps in maintaining system time, even when the system is turned off or disconnected from power.

Example Circuit Design:

Let's consider the application scenario where the DS12C887+ is used to keep track of time in a personal computer system.

1. Connect VCC to System Power: This is the power supply for the DS12C887+. It needs to be connected to your system's 5V power source. The DS12C887+ has pin 24 for this.

2. Connect VBAT to Battery Backup: This pin (pin 20) is used to connect to the backup battery. By doing this, the chip can continue to keep time even if the main system power is switched off.

3. Connect GND to System Ground: The GND pin (pin 12) is the ground reference for the DS12C887+. To the system ground it ought to be linked.

4. Connect Address and Data Bus to CPU: The DS12C887+ communicates with the CPU over a multiplexed address/data bus (pins 11,14-19,1-8). These pins should be connected to the corresponding pins on the CPU.

5. Connect RST to Reset Controller: The RST pin (pin 21) is an active-low signal that resets the DS12C887+. This can be connected to a reset controller or directly to a system reset switch.

6. Connect IRQ to Interrupt Controller: The IRQ pin (pin 22) is an active-low signal that is used to generate interrupts. This should be connected to an interrupt controller in your system.

7. Connect DS to Data Strobe Input: The DS pin (pin 23) is used as a data strobe signal during a read or write operation. It should be connected to a strobe signal from your system.

When designing the circuit, you need to consider the power supply (VCC should be 5V), the backup battery, and the connection to the CPU. All the components should be able to handle the voltages and current they will be subjected to. You should also consider the PCB layout, ensuring that the DS12C887+ is located near the CPU and the backup battery to minimize trace lengths and avoid signal degradation.

In this article, the focus is primarily on the DS12C887+ chip, its features, applications, and a brief example of a circuit design where it's used. The DS12C887+ is a versatile chip and its careful use can ensure accurate timekeeping in many applications.

DS12C887+ information

DS12C887+ Specifications

Package/Case:
24-DIP Module (0.600, 15.24mm)
Packaging:
Tube
Series:
-
ProductStatus:
Active
Type:
Clock/Calendar
Features:
Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output
MemorySize:
113B
TimeFormat:
HH:MM:SS (12/24 hr)
DateFormat:
YY-MM-DD-dd
Interface:
Parallel
Voltage-Supply:
4.5V ~ 5.5V
Voltage-SupplyBattery:
2.5V ~ 4V
Current-Timekeeping(Max):
15mA @ 4.5V ~ 5.5V
OperatingTemperature:
0°C ~ 70°C
MountingType:
Through Hole

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6. What is the process for return or replacement of DS12C887+?

All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the DS12C887+ we delivered, we will accept the replacement or return of the DS12C887+ only when all of the below conditions are fulfilled:

(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.

(2)We are informed of the defect described above within 90 days after the delivery of DS12C887+.

(3)The PartNo is unused and only in the original unpacked packaging.

Two processes to return the products:

(1)Inform us within 90 days

(2)Obtain Requesting Return Authorizations