64 Kbit 8Kb x8 TIMEKEEPER SRAM with ADDRESS/DATA MULTIPLEXED The **M48T559Y-MH1** is a **Timekeeping RAM (TKRAM)** device manufactured by **STMicroelectronics (ST)**. Below are its specifications, descriptions, and features based on factual information:
### **Manufacturer:**
**STMicroelectronics (ST)**
### **Specifications:**
- **Type:** Timekeeping RAM (TKRAM)
- **Memory Size:** 8 KB (64 Kb)
- **Interface:** Parallel
- **Supply Voltage:** 4.5V to 5.5V
- **Operating Temperature Range:** -40°C to +85°C
- **Package:** 28-pin DIP (Dual In-line Package)
- **Real-Time Clock (RTC):**
- Seconds, minutes, hours, day, date, month, and year
- Leap year compensation (up to 2100)
- Automatic daylight saving time adjustment
- **Battery Backup:** Integrated lithium energy source (non-replaceable)
- **Data Retention:** Minimum 10 years in the absence of power
- **Access Time:** 150 ns
### **Descriptions:**
- The **M48T559Y-MH1** combines **SRAM** and a **real-time clock (RTC)** with battery backup.
- It is designed for applications requiring **non-volatile timekeeping and data storage**, such as industrial systems, servers, and embedded controllers.
- The device includes an **integrated lithium battery** to maintain timekeeping and SRAM contents during power loss.
### **Features:**
- **8 KB (64 Kb) SRAM** with battery backup
- **Real-Time Clock (RTC)** with BCD-coded timekeeping
- **Automatic power-fail detection** and switch to battery backup
- **Low power consumption** in battery mode
- **Industrial temperature range** (-40°C to +85°C)
- **28-pin DIP package** for easy integration
This information is strictly based on the manufacturer's datasheet and specifications. No additional suggestions or guidance are included.
