Overview
The M48T35AV-10MH1F, produced by STMicroelectronics, is a highly integrated 32 Kbit x 8 non-volatile static RAM and real-time clock solution. This monolithic chip combines ultra-low power SRAM, a real-time clock, power-fail control circuit, and a battery in a single package. It is designed to provide non-volatile memory and real-time clock functionality, making it an ideal choice for applications requiring data retention and precise timekeeping.
The device is available in two special packages: the 28-pin, 600 mil DIP CAPHAT™ package and the 28-pin, 330 mil SOIC package. The CAPHAT™ package houses the silicon, a quartz crystal, and a long-life lithium button cell, while the SOIC package allows for a separate SNAPHAT® housing containing the battery and crystal to be mounted after the surface mount process.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Memory Size | 32 Kbit x 8 | 256 Kbit |
| Supply Voltage (VCC) | 3.0 to 3.6 V | |
| Power-Fail Deselect Voltage (VPFD) | 2.7 to 3.0 V | |
| Operating Temperature | 0 to 70 °C | |
| Package Types | CAPHAT™ DIP, SOIC with SNAPHAT® housing | |
| Battery Life | At least 7 years | |
| Clock Accuracy | BCD coded year, month, day, date, hours, minutes, and seconds | |
| Compliance | RoHS compliant, lead-free second level interconnect |
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 with automatic corrections for month lengths and leap years.
- Battery low flag (BOK) and frequency test output for real-time clock.
- Automatic power-fail chip deselect and WRITE protection.
- Self-contained battery and crystal in CAPHAT™ DIP package or separate SNAPHAT® housing for SOIC package.
- Pin and function compatible with JEDEC standard 32 Kbit x 8 SRAMs.
- RoHS compliant with lead-free second level interconnect.
Applications
The M48T35AV-10MH1F is suitable for a variety of applications that require non-volatile memory and precise timekeeping, such as:
- Industrial control systems.
- Medical devices.
- Aerospace and defense systems.
- Automotive systems.
- Data loggers and monitoring systems.
- Smart meters and energy management systems.
Q & A
- What is the memory size of the M48T35AV-10MH1F?
The memory size is 32 Kbit x 8, which equals 256 Kbit.
- What are the available package types for the M48T35AV-10MH1F?
The device is available in 28-pin, 600 mil DIP CAPHAT™ and 28-pin, 330 mil SOIC packages with a separate SNAPHAT® housing.
- What is the operating voltage range for the M48T35AV-10MH1F?
The operating voltage range is 3.0 to 3.6 V.
- How does the power-fail protection work in the M48T35AV-10MH1F?
The device automatically powers-fail deselects and write protects the SRAM when VCC falls below the battery backup switchover voltage (VSO), ensuring data security.
- What is the battery life of the M48T35AV-10MH1F?
The internal battery maintains data for at least 7 years when VCC is less than VSO.
- Is the M48T35AV-10MH1F RoHS compliant?
Yes, the device is RoHS compliant with lead-free second level interconnect.
- How does the real-time clock function in the M48T35AV-10MH1F?
The real-time clock stores BCD coded year, month, day, date, hours, minutes, and seconds with automatic corrections for month lengths and leap years.
- Can the SNAPHAT® housing be replaced?
Yes, the SNAPHAT® housing containing the battery and crystal is replaceable.
- What are the key benefits of using the M48T35AV-10MH1F?
The key benefits include integrated ultra-low power SRAM and real-time clock, automatic power-fail protection, and long battery life.
- Is the M48T35AV-10MH1F compatible with standard SRAMs?
Yes, it is pin and function compatible with JEDEC standard 32 Kbit x 8 SRAMs.
