Overview
The M48T08-100PC1, produced by STMicroelectronics, is an 8 K x 8 non-volatile static RAM and real-time clock integrated into a single monolithic chip. This device is pin and function compatible with the DS1643 and JEDEC standard 8 K x 8 SRAMs. It combines the features of a reliable non-volatile memory and a real-time clock, making it an ideal solution for applications requiring both data storage and timekeeping. The M48T08-100PC1 is available in two special packages: a 28-pin, 600 mil DIP CAPHAT™ package that includes a quartz crystal and a long-life lithium button cell, and a 28-pin, 330 mil SOIC package that allows for a separate SNAPHAT® housing containing the battery and crystal to be mounted after the surface mount process.
Key Specifications
| Parameter | Value |
|---|---|
| Memory Size | 8 K x 8 bits (64 Kbit) |
| Supply Voltage (VCC) | 4.75 to 5.5 V (M48T08), 4.5 to 5.5 V (M48T18/T08Y) |
| Power-Fail Deselect Voltage (VPFD) | 4.5 V ≤ VPFD ≤ 4.75 V (M48T08), 4.2 V ≤ VPFD ≤ 4.5 V (M48T18/T08Y) |
| Clock Accuracy | Typical ±1 minute per month at 25 °C |
| Package Types | 28-pin DIP CAPHAT™, 28-pin SOIC with SNAPHAT® top |
| Operating Temperature | -40 °C to 85 °C |
| RoHS Compliance | Yes, Ecopack2 |
Key Features
- Integrated ultra-low power SRAM, real-time clock, power-fail control circuit, and battery.
- BYTEWIDE™ RAM-like clock access.
- BCD coded year, month, day, date, hours, minutes, and seconds.
- Automatic power-fail chip deselect and WRITE protection.
- Software controlled clock calibration for high accuracy applications.
- Self-contained battery and crystal in the CAPHAT™ DIP package.
- SOIC package provides direct connection for a SNAPHAT® top which contains the battery and crystal.
- Pin and function compatible with DS1643 and JEDEC standard 8 K x 8 SRAMs.
- RoHS compliant and lead-free second level interconnect.
Applications
The M48T08-100PC1 is suitable for various industrial, automotive, and consumer electronics applications where both non-volatile memory and real-time clock functions are required. It is particularly useful in systems that need to maintain time and data even during power failures, such as:
- Industrial control systems.
- Automotive systems requiring time and data logging.
- Consumer electronics with real-time clock requirements.
- Medical devices needing precise timekeeping and data storage.
Q & A
- What is the memory size of the M48T08-100PC1?
The M48T08-100PC1 has a memory size of 8 K x 8 bits (64 Kbit).
- What are the supply voltage ranges for the M48T08 and M48T18/T08Y?
The supply voltage range for the M48T08 is 4.75 to 5.5 V, and for the M48T18/T08Y, it is 4.5 to 5.5 V.
- What is the typical clock accuracy of the M48T08-100PC1?
The typical clock accuracy is ±1 minute per month at 25 °C.
- What types of packages are available for the M48T08-100PC1?
The device is available in 28-pin DIP CAPHAT™ and 28-pin SOIC with SNAPHAT® top packages.
- Is the M48T08-100PC1 RoHS compliant?
- What is the operating temperature range for the M48T08-100PC1?
The operating temperature range is -40 °C to 85 °C.
- How does the SNAPHAT® housing prevent battery and crystal damage?
The SNAPHAT® housing is designed to be mounted on top of the SOIC package after the surface mount process, preventing potential damage due to high temperatures.
- Is the M48T08-100PC1 compatible with other SRAMs?
- What are some common applications for the M48T08-100PC1?
- Does the M48T08-100PC1 have automatic power-fail protection?
