What is the Additional Feature ?

Name: DS1742W-120
Brand: Analog Devices Inc./Maxim Integrated
SKU: DS1742W-120
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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

Cart ( )

lmages are for reference only See Product Specifications

Analog Devices Inc./Maxim Integrated DS1742W-120

Part No.:: DS1742W-120

Manufacturer:: Analog Devices Inc./Maxim Integrated

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

Datasheet:: DS1742W-120.pdf

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

In Stock:: 3339

Quantity:: Add To Cart

For more detailed including pricing and shipping

: Quick response, quick quotation

: Flash shipment, no worries after sales

: Original channel, guarantee of the authentic products

Please send RFQ , we will respond immediately.

Purchase and inquiry

DS1742W-120 Specifications

Package/Case:
24-DIP Module (0.600, 15.24mm)
Packaging:
Tube
Series:
-
ProductStatus:
Obsolete
Type:
Clock/Calendar
Features:
Leap Year, NVSRAM, Y2K
MemorySize:
2KB
TimeFormat:
HH:MM:SS (24 hr)
DateFormat:
YY-MM-DD-dd
Interface:
Parallel
Voltage-Supply:
2.97V ~ 3.63V
Voltage-SupplyBattery:
-
Current-Timekeeping(Max):
2mA @ 3.3V
OperatingTemperature:
0°C ~ 70°C
MountingType:
Through Hole

DS1742W-120 this integrated circuit is available in factory sealed anti static packs. at icwhale.com. Please read product page below detail information. including DS1742W-120 price, data-sheet, in-stock availability, technical difficulties. Also. Quickly Enter the access of compare listing to find out replaceable electronic parts. If you want to retrieve comprehensive data for DS1742W-120 to optimize the supply chain (including cross references, life-cycle, parametric, counterfeit risk, obsolescence managements forecasts), please contact to our Tech-supports team.

Purchase in icwhale.com

There is no doubt that you may place an order without registering to icwhale.com.

We strongly suggest you sign in our shop before purchasing as you can track your order real-time tracking.

Means of Payment in icwhale.com

For your convenience, we support multiple payment methods in USD, including PayPal, Credit Card, wire transfer. and Alipay.

RFQ (Request for Quotations) in icwhale.com

It is recommended to acquire for quotations to get the latest prices and inventories about the parts.

Our sales will reply to your request by email within 24 hours.

Warm reminder

1. You'll receive an order information email in your email inbox. (Please remember to check the spam folder if you didn't hear from us).

2. Since inventories and prices may fluctuate to some extent, the sales manager is going to reconfirm the order and let you know if there are any updates.

Shipping & Handling

Shipping fee starts at $35, but some countries will exceed $35. For example (South Africa, Brazil, India, Pakistan, Israel, etc.)

The basic freight (for package ≤0.5kg or corresponding volume) depends on the time zone and countries.

Shipping Method

Currently, our products are shipped through DHL, FedEx, SF, UPS and China Post.

Order Tracking for International Orders

Once your order has been shipped, the tracking number will be sent to the email address registered to your account. This information can also be viewed when logged into your account in the "my account" page.

DS1742W-120 information

Views：

DS1742W-120 Typical application Circuitry

DS1742W-120

The DS1742W-120 is a fully integrated, non-volatile (NV) SRAM with a real-time clock (RTC), a crystal, and a lithium battery. Manufactured by Maxim Integrated, this chip is designed to retain data and keep accurate time for years in the absence of external power, making it an essential component for data logging, industrial control systems, telecommunications, and any other applications requiring reliable timekeeping and data preservation without continuous power.

Key Features and Parameters:

- Non-Volatile SRAM: Provides 2KB of NV SRAM for data storage, ensuring data retention without external power.

- Integrated Real-Time Clock: Keeps track of time in hours, minutes, and seconds; date, month, and year.

- Automatic Battery Backup: The lithium battery automatically takes over when external power is lost, maintaining data and clock operations.

- Wide Operating Temperature Range: Suitable for industrial applications with a temperature range from -40°C to +85°C.

- Low Power Consumption: Optimized for minimal power draw from the battery when operating in backup mode.

Application Scenario – Industrial Process Control System:

In an industrial process control system, the DS1742W-120 can be used to maintain system configuration settings, operation logs, and provide accurate time-stamping for events, even during power outages.

Circuit Design Details:

1. Power Supply Connection:

- VCC (Pin 24): Connect to a 5V power supply. Implement a 0.1 µF decoupling capacitor near this pin to stabilize the supply voltage.

- Ground (GND, Pin 12): Connect to the system's ground plane, ensuring a stable operation ground reference.

2. Data Interface:

- Data Bus (D0-D7, Pins 1-8): These bidirectional pins should be connected to the data bus of the microcontroller or processor in the control system for reading/writing data to the NV SRAM.

3. Control and Addressing:

- Address Inputs (A0-A10, various pins): Connect these to the corresponding output pins on the microcontroller to address specific memory locations within the NV SRAM.

- Write Enable (WE, Pin 27) and Read (RD, Pin 22): These active-low control signals are crucial for initiating write and read operations, respectively. Interface them with control outputs from the microcontroller.

4. Real-Time Clock Functionality:

- Crystal Oscillator: The DS1742W-120 includes an integrated crystal oscillator that does not require external components for the RTC function.

- Battery Backup: A built-in lithium battery powers the RTC and SRAM when VCC is unavailable, ensuring continuous timekeeping and data retention.

5. Additional Functionality:

- Chip Enable (CE, Pin 26): An active-low signal that enables the DS1742W-120 for operation. Connecting it to a microcontroller pin allows for control over the chip's active state.

Design Considerations:

- Battery Dependency: Given the chip's reliance on its internal battery for data and clock maintenance during power loss, consider the battery's lifespan in the overall system design and maintenance schedule.

- EMI and Signal Integrity: Industrial environments can introduce significant electromagnetic interference. Careful PCB layout and grounding practices are vital to protect data signals and clock accuracy.

- Thermal Management: Although the DS1742W-120 is designed for a wide temperature range, placing it away from heat sources can help maintain optimal performance and battery longevity.

- Firmware Integration: Developing firmware that effectively communicates with the DS1742W-120, managing SRAM reads/writes, and synchronizing the RTC with system events, is crucial for maximizing its utility in the control system.

- Power Supply Stability: Ensure the VCC supply to the DS1742W-120 is stable and clean, as fluctuations can affect SRAM and RTC operations, especially just before switching to battery backup.

Integrating the DS1742W-120 into an industrial process control system not only enhances the reliability of data storage and timekeeping but also ensures that critical system configurations and event logs are preserved during power outages. This application highlights the DS1742W-120's critical role in maintaining operational continuity and data integrity in demanding industrial environments.

DS1742W-120 FAQ

1. How to order DS1742W-120 on icwhale.com?

Currently, icwhale.com only provide peer-to-peer order processing. While you submit the RFQ, our professional agent will contact you with the competitive prices in the global market, and our agent will prompt you to finish the order if you accept our offers.

2. How does icwhale.com guarantee that DS1742W-120 is from the original manufacturer or authorized agents?

We have a professional and experienced quality control team to strictly verify and test the DS1742W-120. All suppliers must pass our qualification reviews before they can publish their products including DS1742W-120 on icwhale.com; we pay more attention to the channels and quality of DS1742W-120 products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.

3. Are the DS1742W-120 price and inventory displayed accurate?

The price and inventory of DS1742W-120 fluctuates frequently and cannot be updated in time, it will be updated periodically within 24 hours. And, our quotation usually expires after 5 days.

4. What forms of payment are accepted?

Wire Transfer, PayPal, Alipay, Wechat, Credit Card, Western Union, MoneyGram, and Escrow are all acceptable.

Warm Tips: Some orders in certain payment forms may require handling fee.

5. How is the shipping arranged?

Customers can choose industry-leading freight companies, including DHL, UPS, FedEx, TNT, and Registered Mail. Shipping insurance is also available.

Once your order has been processed for shipment, our salesperson will send you an email advising you of the shipping status and tracking number.

Warm Tips: It may take up to 24 hours for the carriers to display tracking information. Usually, express delivery takes 3-5 days, and registered mail takes 25-60 days.

6. What is the process for return or replacement of DS1742W-120?

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 DS1742W-120 we delivered, we will accept the replacement or return of the DS1742W-120 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 DS1742W-120.

(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