Overview
The M48T58Y-70MH1E, produced by STMicroelectronics, is a highly integrated non-volatile static RAM and real-time clock solution. This component is part of the TIMEKEEPER® RAM series, offering 64 Kbit (8 Kb x 8) of non-volatile memory. It is designed to provide a battery-backed memory and real-time clock in a single package, making it ideal for applications requiring reliable timekeeping and data storage.
The device 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 | 64 Kbit (8 Kb x 8) |
| Supply Voltage (VCC) | 4.5 to 5.5 V |
| Power-Fail Deselect Voltage (VPFD) | 4.2 V ≤ VPFD ≤ 4.5 V |
| Operating Temperature (°C) | 0 to 70 |
| Package Types | 28-pin DIP CAPHAT™, 28-pin SOIC with SNAPHAT® |
| Time Format | HH:MM:SS, BCD coded year, month, day, date |
| Battery Backup | Self-contained battery and crystal in CAPHAT™ DIP package, separate SNAPHAT® for SOIC |
| Compatibility | Pin and function compatible with JEDEC standard 8 Kb x 8 SRAMs |
| RoHS Compliance | Yes, 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.
- Frequency test output for real-time clock.
- Automatic power-fail chip deselect and WRITE protection.
- Self-contained battery and crystal in the CAPHAT™ DIP package.
- SOIC package provides direct connection for a SNAPHAT® housing containing the battery and crystal.
- Pin and function compatible with JEDEC standard 8 Kb x 8 SRAMs.
- RoHS compliant with lead-free second level interconnect.
Applications
The M48T58Y-70MH1E is suitable for a variety of applications that require reliable timekeeping and non-volatile data storage. These include:
- Industrial control systems.
- Medical devices.
- Aerospace and defense systems.
- Automotive systems.
- Data loggers and monitoring systems.
- Any system requiring battery-backed memory and real-time clock functionality.
Q & A
- What is the memory size of the M48T58Y-70MH1E?
The memory size is 64 Kbit (8 Kb x 8).
- What are the supply voltage ranges for the M48T58Y-70MH1E?
The supply voltage range is 4.5 to 5.5 V.
- What is the power-fail deselect voltage range for the M48T58Y?
The power-fail deselect voltage range is 4.2 V ≤ VPFD ≤ 4.5 V.
- What are the package options available for the M48T58Y-70MH1E?
The device is available in 28-pin DIP CAPHAT™ and 28-pin SOIC with SNAPHAT® packages.
- Is the M48T58Y-70MH1E RoHS compliant?
Yes, it is RoHS compliant with lead-free second level interconnect.
- How does the battery backup work in the M48T58Y-70MH1E?
The device has a self-contained battery and crystal in the CAPHAT™ DIP package, and for the SOIC package, a separate SNAPHAT® housing contains the battery and crystal.
- What is the time format used by the M48T58Y-70MH1E?
The time format is HH:MM:SS, with BCD coded year, month, day, and date.
- Is the M48T58Y-70MH1E compatible with standard SRAMs?
Yes, it is pin and function compatible with JEDEC standard 8 Kb x 8 SRAMs.
- What are the operating temperature ranges for the M48T58Y-70MH1E?
The operating temperature range is 0 to 70°C.
- How does the device protect data during power failure?
The device has automatic power-fail chip deselect and WRITE protection to ensure data security during power failures.
