DS1742W-120

Real Time Clock Memory DS1742W-120+
4,319 Effective Inventory

DS1742W-120

Effective Inventory4,319

Real Time Clock Memory DS1742W-120+

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DS1742W-120 DataSheet
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DS1742W-120 Details

The DS1742W-120 is a Real Time Clock Timekeeping NV RAM from Analog Devices Inc., designed for high-reliability memory solutions in industrial applications. This device provides a unique combination of fast access times, low power consumption, and high reliability, making it suitable for a wide range of applications.

Pinout

  • VCC: Power supply pin (5V)
  • GND: Ground pin
  • RST: Reset pin
  • INT: Interrupt output pin

Key Features

  • High Reliability: Designed for high-reliability memory solutions in industrial applications.
  • Fast Access Times: Provides fast access times for efficient data retrieval and storage.
  • Low Power Consumption: Consumes low power to minimize heat generation and prolong battery life.
  • High Temperature Range: Operates over a wide temperature range from -40°C to +125°C.

Applications

  • Industrial Automation: Suitable for industrial automation systems requiring high-reliability memory solutions.
  • Aerospace and Defense: Used in aerospace and defense applications where high reliability and low power consumption are critical.
  • Medical Devices: Applied in medical devices that require high-reliability memory solutions for data storage and retrieval.

Where to Use

The DS1742W-120 is suitable for applications that require high-reliability memory solutions, such as industrial automation systems, aerospace and defense applications, and medical devices. It is ideal for systems where low power consumption and high temperature range are important.

How to Use

Connect the DS1742W-120 to your system by wiring the VCC and GND pins to the respective power supply lines. Ensure proper reset and interrupt connections for data retrieval and storage. For detailed usage instructions, refer to the datasheet.

Application Circuit

The application circuit diagram for the DS1742W-120 illustrates how to connect the device to your system. It includes connections for power supply, ground, and data lines, ensuring proper operation and reliable data storage and retrieval.

(Tip: For detailed circuit diagram connections and usage guide, refer to the datasheet.)

Equivalents

  • DS1741W-120: A similar Real Time Clock Timekeeping NV RAM from Analog Devices Inc. offering comparable features and performance.
  • MAX1556: An alternative Real Time Clock Timekeeping NV RAM from Maxim Integrated offering equivalent functionality.

Complementary

The DS1742W-120 can be complemented by the DS1741W-120, which offers additional features such as higher storage capacity and enhanced reliability, suitable for more demanding applications.

When selecting complementary devices, ensure that their features and specifications align with your specific application requirements for optimal performance and compatibility.

DS1742W-120

Specifications

The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Product Category ! Real Time Clock Mounting Style Through Hole
RTC Bus Interface Parallel Time Format ! HH:MM:SS
RTC Memory Size 2 kB Supply Voltage - Max 3.63 V
Supply Voltage - Min 2.97 V Minimum Operating Temperature 0 C
Maximum Operating Temperature ! + 70 C Brand Analog Devices / Maxim Integrated
Function Calendar, Clock, NV Timekeeping RAM Product Type ! Real Time Clocks
Series DS1742W Factory Pack Quantity 14
Subcategory Clock & Timer ICs Part # Aliases DS1742W

Datasheet PDF

Datasheets record the features, absolute maximum ratings, applications and more of the device, which benefit a lot as an overall guide to the specific application of the part.

Preliminary Specification DS1742W-120 PDF Download

FAQs

What is DS1742W-120?

The DS1742W-120 is a low-power, non-volatile, static RAM (NVSRAM) with a capacity of 16K (16,384) bits. It is designed by Maxim Integrated and is ideal for applications requiring data retention in the event of power loss, such as smart meters, industrial automation, and automotive systems.

How Does DS1742W-120 Work?

The DS1742W-120 combines the functionality of a static RAM with a non-volatile element to provide data retention even when the power is removed. It utilizes a small external lithium energy source to maintain the non-volatile memory, ensuring data integrity during power interruptions. The device features a low-power CMOS SRAM with a self-contained lithium energy source and control circuit to provide a non-volatile storage element.

How Many Pins does DS1742W-120 have and What are the Functions of the Pinout Configuration?

The DS1742W-120 is housed in a 24-pin SOIC (Small Outline Integrated Circuit) package. The pinout configuration includes:

  • VCC: Power supply pin.
  • GND: Ground pin.
  • CE: Chip enable pin.
  • NC: No connection pin.
  • WE: Write enable pin.
  • DS, IO3, IO2, IO1, IO0: Data input/output pins.
  • RTC, TEST: Real-time clock and test pins.
  • NC, VBAT: No connection and lithium battery pin.

What are the Pros and Cons of DS1742W-120?

Pros:

  • Data Retention: Provides non-volatile data retention, ensuring data integrity during power loss.
  • Low Power Consumption: Operates with low power, suitable for battery-powered devices.
  • Small Form Factor: The 24-pin SOIC package is space-efficient and suitable for compact designs.
  • RTC Functionality: Includes a real-time clock for timekeeping applications.
  • Robust Design: Reliable non-volatile memory storage with a self-contained lithium energy source.

Cons:

  • Cost: NVSRAM technology may have a higher cost compared to traditional SRAM.
  • Complexity: Requires careful consideration of battery maintenance and replacement for long-term use.
  • External Battery: Requires an external lithium energy source for non-volatile operation.

Are There Any Equivalents/Alternatives to DS1742W-120 for Recommendation?

  • The M48Z02 from STMicroelectronics is a similar non-volatile static RAM option with 16K capacity.
  • Alternatives to the DS1742W-120 include the CY14B101L from Cypress Semiconductor and the FM1608 from Fujitsu.

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