Overview
The M48T58-70PC1, produced by STMicroelectronics, is a highly integrated non-volatile static RAM and real-time clock solution. This component is part of the TIMEKEEPER® RAM family and is available in two special packages: a 28-pin, 600 mil DIP CAPHAT™ package and a 28-pin, 330 mil SOIC package with a separate SNAPHAT® housing for the battery and crystal. The M48T58-70PC1 is pin and function compatible with JEDEC standard 8 Kb x 8 SRAMs, making it a versatile option for various applications requiring non-volatile memory and real-time clock functionality.
Key Specifications
| Parameter | Value |
|---|---|
| Memory Size | 64 Kbit (8 Kb x 8) |
| Supply Voltage (VCC) | 4.75 to 5.5 V |
| Power-Fail Deselect Voltage (VPFD) | 4.5 V ≤ VPFD ≤ 4.75 V |
| Package Type | PDIP 28 (600 mil), SOIC 28 (330 mil) with SNAPHAT® |
| Operating Temperature | 0 to 70 °C |
| READ Cycle Time | 70 ns |
| WRITE Protect Voltages | VCC = 4.75 to 5.5 V; 4.5 V ≤ VPFD ≤ 4.75 V |
| RoHS Compliance | Ecopack2, 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 and lead-free second level interconnect.
Applications
The M48T58-70PC1 is suitable for a wide range of applications that require non-volatile memory and real-time clock functionality. These include:
- Industrial control systems.
- Medical devices.
- Automotive systems.
- Consumer electronics.
- Embedded systems requiring data retention during power failures.
Q & A
- What is the memory size of the M48T58-70PC1?
The M48T58-70PC1 has a memory size of 64 Kbit (8 Kb x 8). - What are the supply voltage and power-fail deselect voltage ranges for the M48T58-70PC1?
The supply voltage range is 4.75 to 5.5 V, and the power-fail deselect voltage range is 4.5 V ≤ VPFD ≤ 4.75 V. - What types of packages are available for the M48T58-70PC1?
The component is available in a 28-pin, 600 mil DIP CAPHAT™ package and a 28-pin, 330 mil SOIC package with a separate SNAPHAT® housing. - Is the M48T58-70PC1 RoHS compliant?
Yes, the M48T58-70PC1 is RoHS compliant and has a lead-free second level interconnect. - What is the operating temperature range for the M48T58-70PC1?
The operating temperature range is 0 to 70 °C. - How does the power-fail control circuit work in the M48T58-70PC1?
The power-fail control circuit monitors the single 5 V supply and write-protects the SRAM when VCC is out of tolerance, ensuring data security during low VCC conditions. - Can the M48T58-70PC1 be used in place of standard SRAMs?
Yes, the M48T58-70PC1 is pin and function compatible with JEDEC standard 8 Kb x 8 SRAMs. - What is the purpose of the SNAPHAT® housing in the SOIC package?
The SNAPHAT® housing contains the battery and crystal and can be mounted on top of the SOIC package after the surface mount process to prevent damage from high temperatures. - How is the real-time clock information accessed in the M48T58-70PC1?
The real-time clock information is stored in the upper eight memory locations and can be accessed in the same manner as any other location in the static memory array. - Does the M48T58-70PC1 support BCD coding for date and time?
Yes, the component supports BCD coded year, month, day, date, hours, minutes, and seconds.
