Overview
The M48T02-70PC1, produced by STMicroelectronics, is a 2 Kb x 8 non-volatile static Timekeeper® RAM and real-time clock IC. This component is designed to be pin and function compatible with JEDEC standard 2 Kb x 8 SRAMs and the DS1642. It integrates an ultra-low power SRAM, a real-time clock, and power-fail control circuit, making it a highly reliable solution for maintaining data and clock functionality even in the absence of power.
The device features a self-contained battery and crystal in the CAPHAT™ DIP package, ensuring data retention for at least 10 years over the operating temperature range. This makes it suitable for applications requiring long-term data storage and accurate timekeeping.
Key Specifications
| Attribute | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Part Number | M48T02-70PC1 |
| Package Style | PCDIP-24 |
| Mounting Method | Through Hole |
| Memory Size | 2 Kb x 8 (16 Kbits) |
| Access Time | 70 ns |
| Supply Voltage | 4.75 to 5.5 V |
| Power-Fail Deselect Voltage (VPFD) | 4.5 V ≤ VPFD ≤ 4.75 V |
| Clock Accuracy | ±1 minute a month at 25 °C |
| Operating Temperature Range | 0 to 70 °C |
| Data Retention | At least 10 years in the absence of power |
Key Features
- Integrated ultra-low power SRAM, real-time clock, and power-fail control circuit
- BYTEWIDE™ RAM-like clock access
- BCD coded year, month, day, date, hours, minutes, and seconds
- Software controlled clock calibration for high accuracy applications
- Automatic power-fail chip deselect and WRITE protection
- Self-contained battery and crystal in the CAPHAT™ DIP package
- Pin and function compatible with JEDEC standard 2 Kb x 8 SRAMs
- RoHS compliant and lead-free second level interconnect
Applications
The M48T02-70PC1 is versatile and can be used in various applications requiring non-volatile memory and accurate timekeeping. Some common applications include:
- Security systems: For secure data storage and time-stamping.
- Industrial control systems: To maintain critical data and time information even during power failures.
- Medical devices: For reliable data logging and timekeeping in medical equipment.
- Aerospace and defense: Where long-term data retention and accurate timekeeping are crucial.
- Automotive systems: For maintaining vehicle data and time information.
Q & A
- What is the M48T02-70PC1?
The M48T02-70PC1 is a 2 Kb x 8 non-volatile static Timekeeper® RAM and real-time clock IC produced by STMicroelectronics.
- What is the memory size of the M48T02-70PC1?
The memory size is 2 Kb x 8, which is equivalent to 16 Kbits.
- What is the access time of the M48T02-70PC1?
The access time is 70 ns.
- What is the supply voltage range for the M48T02-70PC1?
The supply voltage range is 4.75 to 5.5 V.
- How accurate is the real-time clock in the M48T02-70PC1?
The typical clock accuracy is ±1 minute a month at 25 °C.
- What is the data retention period of the M48T02-70PC1 in the absence of power?
The data retention period is at least 10 years in the absence of power.
- Is the M48T02-70PC1 RoHS compliant?
- What type of package does the M48T02-70PC1 come in?
The M48T02-70PC1 comes in a 24-pin PCDIP (Plastic Dual In-Line Package) with a CAPHAT™ package that includes a self-contained battery and crystal.
- How does the power-fail protection work in the M48T02-70PC1?
The device automatically power-fail deselects and write protects itself when the supply voltage falls within the specified VPFD window, ensuring data security during power failures.
- Can the M48T02-70PC1 be used in place of standard SRAMs?
