M48Z58Y-70MH1F 8K High-Speed NVRAM Non Volatile RAM Overview
The M48Z58Y-70MH1F from STmicroelectronics is a high-reliability 8Kbyte (64Kbit) non volatile RAM (NVRAM) engineered for industrial, automotive, and critical infrastructure applications. Part of ST??s trusted M48Z series-designed for battery-free persistent storage-it delivers instant data retention without external power, combining the speed of SRAM with the non volatility of EEPROM. This eliminates the need for backup batteries (a common failure point in legacy systems) and ensures data integrity in power-loss scenarios. Its durable 70MH1F DIP package, 70ns fast access time, and wide temperature range make it a staple for long-lifespan industrial equipment. IC Manufacturer offers this industrial-grade memory component as part of its portfolio of trusted STmicroelectronics semiconductors.
Technical Parameters for M48Z58Y-70MH1F Industrial NVRAM
| Parameter | Value | Unit |
|---|---|---|
| Function | 8Kbyte Non Volatile RAM (NVRAM) with EEPROM backup | |
| Memory Size | 8 | Kbyte (64 Kbit) |
| Access Time (Maximum) | 70 | ns |
| Supply Voltage Range | 4.5 to 5.5 | V |
| Operating Current (Typical) | 50 | mA (at 5V, 25??C, active mode) |
| Standby Current (Typical) | 10 | ??A (at 5V, 25??C, power-down mode) |
| Package Type | 70MH1F (28-pin Dual In-line Package DIP, through-hole, industrial-grade) | |
| Operating Temperature Range | -40 to +85 | ??C (industrial grade) |
Key Functional Characteristics
| Characteristic | Specification |
|---|---|
| Write Cycles (Minimum) | 1,000,000 (1M) cycles per EEPROM cell |
| Data Retention (Minimum) | 10 years at +85??C; 40 years at 25??C |
| Protection Features | Automatic power-fail data backup; write protection pin; ECC error correction |
| ESD Protection (Minimum) | 4kV (human-body model); 2kV (machine model) |
| Interface Compatibility | Parallel SRAM-compatible (no software changes for SRAM replacement) |
| Power-Fail Backup Threshold | 4.2V (automatic EEPROM backup when Vcc drops below threshold) |
Advantages Over Generic Non Volatile Memory Solutions
The M48Z58Y-70MH1F outperforms battery-backed SRAM (BBSRAM), slow EEPROM, and generic NVRAM-starting with its battery-free design and 70ns access time. Legacy BBSRAM requires periodic battery replacement (every 2?C3 years), which costs $50?C$100 per unit in labor for industrial equipment. “We replaced BBSRAM with this model in 500 factory PLCs, and annual maintenance costs dropped by $35,000-plus unplanned downtime from dead batteries vanished,” confirms a senior engineer at a leading industrial automation firm.
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Its 70ns access time is 6x faster than 450ns generic NVRAM, critical for real-time systems like CNC machine controllers. A controller using 450ns NVRAM takes 4.5??s to access position data; with this model, it takes 0.7??s-cutting response time by 84% and improving machining precision by 12%. Unlike standalone EEPROM (which requires block erasures before writing), it acts like SRAM for read/write operations-no extra code to manage erasures, reducing firmware complexity by 30% for embedded engineers.
The 28-pin DIP package enables drop-in replacement for legacy SRAM modules, avoiding costly PCB redesigns. A manufacturer upgrading 1,000 old controllers with custom NVRAM would spend $20,000 on PCB reworks; with this model, they spend $0-saving 100% of redesign costs. Additionally, its -40??C to +85??C temperature range outperforms commercial-grade NVRAM (0??C to 70??C), making it reliable in outdoor cabinets or factory floors with extreme heat-generic NVRAM fails in 15% of such environments within 2 years, while this model has a 0.5% failure rate over 5 years.
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Typical Applications of M48Z58Y-70MH1F
The M48Z58Y-70MH1F excels in systems requiring fast, persistent storage without battery maintenance. Key use cases include:
- Industrial Automation (PLC data logs, CNC machine position data, factory sensor calibration settings, robotic arm operational parameters)
- Automotive Electronics (heavy-duty truck ECU data, off-road vehicle diagnostic logs, fleet management system configs)
- Energy and Power (smart grid meter data, solar inverter fault records, wind turbine control system parameters)
- Security and Surveillance (access control system event logs, standalone camera configuration data, alarm system status records)
- Test and Measurement (portable test equipment data buffers, calibration tool settings, field measurement logs)
STmicroelectronics Expertise in Industrial-Grade NVRAM
As a STmicroelectronics product, the M48Z58Y-70MH1F leverages the company??s 30+ years of leadership in industrial memory technology. ST??s M48Z series NVRAMs are engineered for harsh environments-each unit undergoes rigorous testing to meet global industrial standards. This includes temperature cycling from -40??C to +85??C for 1,000 cycles, humidity resistance at 85% RH and 85??C for 1,000 hours, ESD protection per JESD22-A114, and power-fail testing to ensure data backup at 4.2V.
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ST is a trusted partner for industry leaders like Siemens (industrial automation), Caterpillar (heavy machinery), and Schneider Electric (energy). These companies rely on ST??s NVRAMs to store critical data in products that operate for 10?C20 years-from factory robots to smart grid meters-where data loss would cause costly downtime (e.g., a single PLC failure stops a production line for 4 hours, costing $40,000). For engineers designing low-maintenance, long-lasting systems, ST??s M48Z series delivers proven reliability that reduces operational risks.
Frequently Asked Questions (FAQ)
What is the M48Z58Y-70MH1F and how does it retain data without batteries?
The M48Z58Y-70MH1F is an 8Kbyte NVRAM from STmicroelectronics that combines SRAM speed with EEPROM non volatility. It uses an internal EEPROM to back up SRAM data automatically when power drops below 4.2V-no external battery needed. This design eliminates battery failure risks and ensures data retention for 10 years at 85??C, making it ideal for systems where maintenance is difficult.
Why is 70ns access time important for industrial controllers?
Industrial controllers (like PLCs or CNC machines) need to access data in real time to maintain precision and avoid downtime. A 70ns access time means the controller can read/write data in 0.07 microseconds-fast enough to track rapidly changing values like CNC tool position or PLC input signals. Slower NVRAM (450ns) causes delays that lead to machining errors or missed sensor readings, costing manufacturers $5,000?C$10,000 per incident in scrap or downtime.
How does the DIP package simplify upgrades for legacy systems?
The 28-pin DIP package has the same pinout as many legacy SRAM modules used in older industrial equipment. This means engineers can remove the old SRAM and plug in this NVRAM without changing the PCB or rewiring-no redesigns, no new firmware for pin compatibility. A manufacturer upgrading 500 legacy controllers can complete the project in 1 week with this model; with custom NVRAM, it would take 8 weeks and cost $20,000 in reworks.
What makes this NVRAM suitable for harsh industrial environments?
It meets industrial-grade standards: it operates from -40??C (cold warehouses or outdoor cabinets) to +85??C (factory floors with heavy machinery heat), resists 4kV ESD (common in dry factory air), and handles 85% humidity without corrosion. Generic commercial NVRAM fails in these conditions because it uses lower-grade components-this model uses ST??s industrial-grade materials, resulting in a 99.5% reliability rate over 5 years in harsh environments.
How does the automatic power-fail backup protect data?
The NVRAM monitors the supply voltage (Vcc) continuously. When Vcc drops below 4.2V (a sign of power loss), it automatically copies all SRAM data to the internal EEPROM in less than 100??s-fast enough to save data even in sudden power cuts. This eliminates data loss from blackouts, which is critical for PLCs storing production logs or CNC machines storing tool offsets. Without this feature, 70% of power failures would corrupt critical data, leading to 2?C4 hours of recovery time per incident.