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M48T212V85MH1 from ST,ST Microelectronics

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M48T212V85MH1

Manufacturer: ST

3.3V-5V TIMEKEEPER CONTROLLER

Partnumber Manufacturer Quantity Availability
M48T212V85MH1 ST 105 In Stock

Description and Introduction

3.3V-5V TIMEKEEPER CONTROLLER The **M48T212V85MH1** is a Timekeeper SRAM manufactured by **STMicroelectronics (ST)**.  

### **Specifications:**  
- **Type:** Non-volatile SRAM (NVSRAM)  
- **Density:** 128 Kb (16 K x 8)  
- **Interface:** Parallel  
- **Supply Voltage:** 4.5V to 5.5V  
- **Operating Temperature Range:** -40°C to +85°C  
- **Access Time:** 85 ns  
- **Battery Backup:** Integrated lithium energy source  
- **Package:** 28-pin SOIC (MH)  

### **Descriptions and Features:**  
- Combines **SRAM** with an **integrated real-time clock (RTC)** and **non-volatile storage**.  
- **Automatic power-fail chip deselect** and **battery switchover** for data retention.  
- **Self-contained timekeeping** with **seconds, minutes, hours, day, date, month, and year** functions.  
- **Leap-year compensation** valid up to **2100**.  
- **Battery life:** Typically **10 years** of data retention.  
- **Industrial-grade** reliability with extended temperature support.  

This device is commonly used in applications requiring **non-volatile memory with timekeeping**, such as **industrial control systems, networking equipment, and embedded systems**.

Application Scenarios & Design Considerations

3.3V-5V TIMEKEEPER CONTROLLER

Alternative Part Number

  • DS1556W-120 --: Nonvolatile timekeeping RAM with integrated crystal and battery, similar 5V/3.3V supervisory functions and parallel interface, a common drop-in style replacement for ST M48T series NVRAM modules.
  • BQ4845S --: Real-time clock with nonvolatile SRAM and power-fail control, comparable watchdog and battery-backed timekeeping functionality suitable for replacing M48T212V modules.
  • DS1744W-120 --: Nonvolatile timekeeping RAM module with embedded crystal and battery, similar pinout family and 3.3V operation, widely used as an alternative to ST M48T timekeeper devices.

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