Overview
The M48Z35Y-70MH1F is a highly integrated, ultra-low power SRAM solution from STMicroelectronics. This component combines a 256 Kbit (32 Kbit x 8) non-volatile static RAM with power-fail control circuitry and a battery backup system. It is designed to provide a reliable and secure memory solution for various applications, especially where data retention during power failures is critical.
The device is available in a 28-lead SOIC package and can be paired with a separate SNAPHAT® housing that contains a long-life lithium button cell. This unique design allows the battery package to be mounted after the surface mount process, preventing potential battery damage from high temperatures.
Key Specifications
| Parameter | Description | Value | Unit |
|---|---|---|---|
| Memory Capacity | 256 Kbit (32 Kbit x 8) | - | - |
| Supply Voltage (VCC) | 4.5 to 5.5 V | - | V |
| Power-Fail Deselect Voltage (VPFD) | 4.2 to 4.5 V | - | V |
| Battery Backup Switchover Voltage (VSO) | 3.0 V | - | V |
| Operating Temperature (TA) | 0 to 70 °C | - | °C |
| READ Cycle Time | 70 ns | - | ns |
| WRITE Cycle Time | 70 ns | - | ns |
| Data Retention Time | 10 years (at 25 °C, VCC = 0 V) | - | Years |
| Package Type | 28-lead SOIC (SOH28) | - | - |
Key Features
- Integrated ultra-low power SRAM, power-fail control circuit, and battery backup system.
- Automatic power-fail chip deselect and WRITE protection.
- READ cycle time equals WRITE cycle time.
- Self-contained battery in the CAPHAT™ DIP package or separate SNAPHAT® housing for SOIC package.
- Pin and function compatible with JEDEC standard 32 K x 8 SRAMs.
- RoHS compliant and lead-free second level interconnect.
- Unique design allowing SNAPHAT battery package to be mounted after surface mount process to prevent battery damage.
Applications
- Industrial control systems requiring reliable data retention during power failures.
- Medical devices where data integrity is critical.
- Aerospace and defense applications needing secure and reliable memory solutions.
- Automotive systems that require non-volatile memory with battery backup.
- Any application where the non-volatility of PROMs is needed without special WRITE timing or limitations.
Q & A
- What is the memory capacity of the M48Z35Y-70MH1F?
The memory capacity is 256 Kbit (32 Kbit x 8).
- What is the supply voltage range for the M48Z35Y-70MH1F?
The supply voltage range is 4.5 to 5.5 V.
- What is the power-fail deselect voltage range for the M48Z35Y-70MH1F?
The power-fail deselect voltage range is 4.2 to 4.5 V.
- How long does the battery backup maintain data?
The battery backup maintains data for up to 10 years at 25 °C with VCC = 0 V.
- What package types are available for the M48Z35Y-70MH1F?
The device is available in a 28-lead SOIC (SOH28) package.
- Is the M48Z35Y-70MH1F RoHS compliant?
- How does the SNAPHAT battery package prevent damage during surface mounting?
The SNAPHAT battery package is designed to be mounted after the surface mount process to prevent potential battery damage from high temperatures.
- What are the typical operating temperatures for the M48Z35Y-70MH1F?
The operating temperature range is 0 to 70 °C.
- How long are the READ and WRITE cycle times for the M48Z35Y-70MH1F?
Both READ and WRITE cycle times are 70 ns.
- Is the M48Z35Y-70MH1F compatible with standard SRAMs?
