3.3V-5V TIMEKEEPER CONTROLLER The **M48T201Y-70MH1** is a Timekeeper SRAM manufactured by **STMicroelectronics (ST)**. Below are its key specifications, descriptions, and features:
### **Specifications:**
- **Type:** Non-volatile SRAM (NVSRAM) with a built-in real-time clock (RTC)
- **Density:** 128 Kb (16 K × 8)
- **Access Time:** 70 ns
- **Supply Voltage:** 4.5V to 5.5V
- **Operating Temperature Range:** -40°C to +85°C
- **Package:** 28-pin PDIP (Plastic Dual In-line Package)
- **Data Retention:** Minimum 10 years with power applied
- **Clock Accuracy:** ±1 minute per month at 25°C
- **Battery Backup:** Built-in lithium energy source
### **Descriptions:**
- The **M48T201Y-70MH1** combines a **16 KB SRAM** with a **real-time clock (RTC)** in a single chip.
- It includes an **integrated lithium battery** for **non-volatile data retention** when power is lost.
- The RTC provides **seconds, minutes, hours, day, date, month, and year** information with **leap-year compensation** up to 2100.
- It is designed for applications requiring **battery-backed memory and timekeeping**, such as industrial controls, medical devices, and embedded systems.
### **Features:**
- **Non-volatile SRAM with RTC**
- **Automatic battery switchover** during power loss
- **Low-power CMOS technology**
- **Industrial temperature range** (-40°C to +85°C)
- **28-pin PDIP package** for easy integration
- **Self-contained timekeeping** with no external components required
- **Write protection** for critical memory areas
This device is ideal for systems requiring **reliable data storage and accurate timekeeping** without external battery management.
