DS1642-100+
Real Time Clock Parallel 2Kbyte Clock/Calendar/NV Timekeeping RAM 24-Pin EDIPDS1642-100+
Real Time Clock Parallel 2Kbyte Clock/Calendar/NV Timekeeping RAM 24-Pin EDIP
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製造商零件號 # : DS1642-100+
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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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DS1642-100+ 數據表
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目前的價格方案正在編制中。請聯絡我們的客戶服務團隊獲取最新的價格資訊。感謝您的理解和支援!
詳細說明
The DS1642 is a 2K x 8 nonvolatile static RAM and a full-function real time clock which are both accessible in a bytewide format. The nonvolatile time keeping RAM is pin- and function-equivalent to any JEDEC standard 2K x 8 SRAM. The device can also be easily substituted in ROM, EPROM and EEPROM sockets, providing read/write nonvolatility and the addition of the real time clock function.FEATURES● Integrated NV SRAM, real time clock, crystal, power fail control circuit and lithium energy source● Standard JEDEC bytewide 2K x 8 static RAM pinout● Clock registers are accessed identically to the static RAM. These registers are resident in the eight top RAM locations● Totally nonvolatile with over 10 years of operation in the absence of power● Access times of 70 ns and 100 ns● Quartz accuracy ±1 minute a month @ 25°C, factory calibrated● BCD coded year, month, date, day, hours, minutes, and seconds with leap year compensation valid up to 2100● Power-fail write protection allows for ±10% VCC power supply tolerance● Lithium energy source is electrically disconnected to retain freshness until power is applied for the first time
主要特徵
- Integrated NV SRAM, real time clock, crystal, power fail control circuit and lithium energy source
- Standard JEDEC bytewide 2K x 8 static RAM pinout
- Clock registers are accessed identically to the static RAM. These registers are resident in the eight top RAM locations
- Totally nonvolatile with over 10 years of operation in the absence of power
- Access times of 70 ns and 100 ns
- Quartz accuracy ±1 minute a month @ 25°C, factory calibrated
- BCD coded year, month, date, day, hours, minutes, and seconds with leap year compensation valid up to 2100
- Power-fail write protection allows for ±10% VCC power supply tolerance
- Lithium energy source is electrically disconnected to retain freshness until power is applied for the first time
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 | Time Format ! | HH:MM:SS |
RTC Memory Size | 2 kB | Supply Voltage - Max | 5.5 V |
Supply Voltage - Min | 4.5 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 | DS1642 | Factory Pack Quantity | 14 |
Subcategory | Clock & Timer ICs | Part # Aliases | DS1642 90-16420+100 |
Unit Weight | 0.021023 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 DS1642-100+?
The DS1642-100+ is a real-time clock (RTC) module designed by Maxim Integrated. It integrates a complete clock/calendar function with a 28-byte nonvolatile static RAM in a compact DIP (Dual Inline Package) format. The module is suitable for timekeeping and data logging applications in various electronic systems.
How Does DS1642-100+ Work?
The DS1642-100+ works by maintaining accurate time and date information using an integrated crystal oscillator and a backup battery. It allows for time tracking and timestamping of events, making it useful for applications requiring time-sensitive data recording and control.
How Many Pins does DS1642-100+ have and What are the Functions of the Pinout Configuration?
The DS1642-100+ is housed in a 24-pin DIP package. The pinout configuration includes:
- VBAT: Battery backup input for maintaining timekeeping during power loss.
- VCC: Power supply input for the RTC module.
- GND: Ground connection.
- X1, X2: Crystal connections for the integrated oscillator.
- IRQ: Interrupt output pin for alarm and timestamp events.
- DATA, CLK, RST: Serial interface control pins for data transfer.
What are the Pros and Cons of DS1642-100+?
Pros:
- Integrated Functionality: Combines clock/calendar and nonvolatile RAM in a single module for simplified timekeeping and data storage.
- Battery Backup: Maintains timekeeping operation during power interruptions or system shutdown.
- Serial Interface: Supports a serial communication interface for easy integration into microcontroller-based systems.
- Compact Package: The DIP package allows for easy PCB mounting and handling.
Cons:
- Limited Memory: The 28-byte nonvolatile RAM may be insufficient for applications requiring extensive data storage.
- Battery Replacement: The backup battery may require periodic replacement, especially in long-term deployment scenarios.
- External Crystal: Requires an external crystal for clock generation, adding to the component count and design complexity.
Are There Any Equivalents/Alternatives to DS1642-100+ for Recommendation?
Alternatives to the DS1642-100+ include the DS3231 from Maxim Integrated and the MCP7940N from Microchip Technology, which offer similar real-time clock and calendar functionalities.
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