Overview
The M48T12-200PC1, produced by STMicroelectronics, is a highly integrated 2 Kb x 8 non-volatile static RAM and real-time clock. This component is part of the TIMEKEEPER® RAM series and is pin and function compatible with the DS1642. It features an ultra-low power SRAM, a real-time clock, and a power-fail control circuit, all integrated on a single silicon chip. The device includes a self-contained battery and crystal in a 24-pin CAPHAT™ DIP package, ensuring continuous operation even in the absence of external power.
The M48T12-200PC1 is designed to provide non-volatile memory functionality, similar to PROMs, without the need for special WRITE timing or limitations on the number of WRITE operations. It is also RoHS compliant, making it environmentally friendly.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Memory Size | 2 Kb x 8 | 16 Kbit |
| Supply Voltage (VCC) | Operating voltage range | 4.5 V to 5.5 V |
| Power-Fail Deselect Voltage (VPFD) | Write protect voltage range | 4.2 V to 4.5 V |
| Operating Temperature | Ambient operating temperature range | 0°C to 70°C |
| Current - Timekeeping (Max) | Maximum current during timekeeping | 3 mA @ 4.5 V to 5.5 V |
| Package Type | Package and mounting type | 24-pin Plastic DIP, Through Hole |
| Battery Life | Accumulated battery life in absence of power | At least 10 years |
| Clock Accuracy | Typical clock accuracy at 25°C | ±1 minute per month |
Key Features
- Integrated ultra-low power SRAM, real-time clock, and power-fail control circuit.
- BYTEWIDE™ RAM-like clock access with 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.
- Easily fits into many ROM, EPROM, and EEPROM sockets without special WRITE timing or limitations.
Applications
The M48T12-200PC1 is suitable for a variety of applications requiring non-volatile memory and real-time clock functionality. These include:
- Embedded systems that need to maintain time and data even during power outages.
- Industrial control systems where accurate timekeeping is crucial.
- Medical devices that require reliable data storage and time tracking.
- Aerospace and automotive systems where robust and accurate timekeeping is essential.
- Any system requiring a compact, integrated solution for memory and real-time clock functions.
Q & A
- What is the memory size of the M48T12-200PC1?
The M48T12-200PC1 has a memory size of 2 Kb x 8, which is equivalent to 16 Kbit.
- What is the operating voltage range of the M48T12-200PC1?
The operating voltage range is from 4.5 V to 5.5 V.
- How accurate is the real-time clock in the M48T12-200PC1?
The typical clock accuracy is ±1 minute per month at 25°C.
- What is the power-fail deselect voltage range for the M48T12-200PC1?
The power-fail deselect voltage range is from 4.2 V to 4.5 V.
- How long does the battery last in the absence of external power?
The battery has sufficient capacity to maintain data and clock functionality for at least 10 years in the absence of power.
- Is the M48T12-200PC1 RoHS compliant?
- What type of package does the M48T12-200PC1 come in?
The M48T12-200PC1 comes in a 24-pin Plastic DIP package with a CAPHAT™ battery and crystal.
- Can the M48T12-200PC1 be used in place of standard SRAMs?
- What is the maximum current during timekeeping for the M48T12-200PC1?
The maximum current during timekeeping is 3 mA at 4.5 V to 5.5 V.
- What are some common applications for the M48T12-200PC1?
