Overview
The M48T02-150PC1 from STMicroelectronics is a highly integrated 2 Kb x 8 non-volatile static RAM and real-time clock solution. This component is pin and function compatible with the DS1642 and is housed in a special 24-pin, 600 mil DIP CAPHAT™ package. The package includes a quartz crystal and a long life lithium button cell, ensuring data and clock functionality for at least 10 years in the absence of power over the operating temperature range.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Memory Organization | 2 Kb x 8 non-volatile static RAM | 16 Kbit |
| Supply Voltage (VCC) | 4.5 to 5.5 V | |
| Power-Fail Deselect Voltage (VPFD) | 4.2 V to 4.75 V (M48T12), 4.5 V to 4.75 V (M48T02) | |
| Clock Format | HH:MM:SS (24h) | |
| Date Format | YY-MM-DD-dd | |
| Clock Accuracy | ±1 minute a month at 25 °C | |
| Time Keeping Current | 3 mA | |
| DC Supply Current | 80 mA | |
| Package Type | 24-pin, 600 mil DIP CAPHAT™ | |
| Operating Temperature Range | 0 to 70 °C |
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 K x 8 SRAMs.
- RoHS compliant.
Applications
- Embedded systems requiring non-volatile memory and real-time clock functionality.
- Industrial control systems.
- Medical devices.
- Aerospace and defense applications.
- Any system needing reliable, long-term data storage and timekeeping.
Q & A
- What is the memory organization of the M48T02-150PC1?
The M48T02-150PC1 has a 2 Kb x 8 non-volatile static RAM, which is 16 Kbit in total.
- What is the supply voltage range for the M48T02-150PC1?
The supply voltage range is 4.5 to 5.5 V.
- How accurate is the real-time clock in the M48T02-150PC1?
The real-time clock has a typical accuracy of ±1 minute a month at 25 °C.
- What is the power-fail deselect voltage range for the M48T02-150PC1?
The power-fail deselect voltage range is 4.2 V to 4.75 V for the M48T12 and 4.5 V to 4.75 V for the M48T02.
- How long does the battery last in the absence of power?
The battery has sufficient capacity to maintain data and clock functionality for at least 10 years in the absence of power over the operating temperature range.
- Is the M48T02-150PC1 RoHS compliant?
- What is the clock format of the M48T02-150PC1?
The clock format is HH:MM:SS (24h).
- What is the date format of the M48T02-150PC1?
The date format is YY-MM-DD-dd.
- Can the clock be calibrated for higher accuracy?
- How does the M48T02-150PC1 protect data during power failure?
The device automatically power-fail deselects and write protects the SRAM when VCC falls within the specified window.
