DS1742W-120+
Real Time Clock Memory DS1742W-120+
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製造商零件號 # : DS1742W-120+
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包裝/封裝: EDIP-24
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製造商: Analog Devices
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產品分類 : Real Time Clocks
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DS1742W-120+ 數據表
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詳細說明
The DALLAS Real Time Clock DS1742W-120+ is a chassis mount resistor with an aluminum wirewound flange axial, box 5.11 ohm ±1% 5W. It is designed to provide accurate timekeeping for a variety of applications.Features:• High accuracy timekeeping• Low power consumption• Easy to install• Durable construction• Wide operating temperature range• RoHS compliantApplications:The DALLAS Real Time Clock DS1742W-120+ is ideal for a variety of applications, including:• Automotive• Industrial• Medical• Telecommunications• Networking• Security• Home automation
主要特徵
- High accuracy timekeeping
- Low power consumption
- Easy to install
- Durable construction
- Wide operating temperature range
- RoHS compliant
規格
以下是所選零件的基本參數,涉及零件的特性及其所屬類別。
Product Category ! | Real Time Clock | RoHS | Details |
Mounting Style | Through Hole | Package / Case | EDIP-24 |
RTC Bus Interface | Parallel | Date Format ! | YYYY-MM-DD |
Time Format ! | HH:MM:SS | RTC Memory Size | 2 kB |
Supply Voltage - Max | 3.6 V | Supply Voltage - Min | 3 V |
Minimum Operating Temperature | 0 C | Maximum Operating Temperature ! | + 70 C |
Brand | Analog Devices / Maxim Integrated | Function | Calendar, Clock, NV Timekeeping RAM |
Operating Supply Current | 15 mA | Product Type ! | Real Time Clocks |
Series | DS1742W | Factory Pack Quantity | 14 |
Subcategory | Clock & Timer ICs | Part # Aliases | DS1742W 90-1742W+120 |
Unit Weight | 0.021164 oz |
數據表 PDF
數據表記錄了器件的特性、絕對最大額定值、應用等,這對於作為器件特定應用的整體指南大有裨益。
常見問題解答
What is DS1742W-120+?
The DS1742W-120+ is a non-volatile static RAM (NVSRAM) module with a real-time clock/calendar (RTC) function designed by Maxim Integrated. It combines the features of a static RAM with the non-volatile storage capability, making it ideal for applications requiring data retention in power-off situations, such as industrial automation, event logging, and data backup systems.
How Does DS1742W-120+ Work?
The DS1742W-120+ functions as a dual-purpose memory module by providing both random access memory (RAM) storage and non-volatile storage using a small onboard lithium coin cell battery. It maintains data integrity during power loss by automatically switching to battery power. The real-time clock/calendar feature ensures accurate timekeeping even when the main power source is off.
How Many Pins does DS1742W-120+ have and What are the Functions of the Pinout Configuration?
The DS1742W-120+ is housed in a 28-pin SOIC (Small Outline Integrated Circuit) package. The pinout configuration includes:
- VCC: Power supply pin.
- GND: Ground pin.
- CE, VBAT: Chip enable and battery input for non-volatile operation.
- SRAM: Static RAM data/control pins.
- RTC: Real-time clock/calendar pins.
- X1, X2: Crystal oscillator connections.
- IRQ: Interrupt output pin.
What are the Pros and Cons of DS1742W-120+?
Pros:
- Non-Volatile Data Storage: Retains data even during power loss, ensuring data integrity.
- Real-Time Clock: Provides accurate timekeeping functionality.
- Integrated Solution: Combines static RAM and RTC in a single module for convenience.
- Battery Backup: Utilizes a long-life battery for reliable non-volatile operation.
- Wide Operating Voltage Range: Supports operation over a range of voltages for versatility.
Cons:
- Cost: NVSRAM solutions like the DS1742W-120+ may have a higher cost compared to standard SRAM modules.
- Complexity: Requires careful handling and consideration of battery replacement for continued non-volatile operation.
- Limited Endurance: Non-volatile memory may have limited write endurance compared to standard RAM.
Are There Any Equivalents/Alternatives to DS1742W-120+ for Recommendation?
- The DS1245 from Maxim Integrated is a similar NVSRAM module with additional features.
- Alternatives to the DS1742W-120+ include the FM1608 from Cypress Semiconductor and the M48Z02 from STMicroelectronics.
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