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M48T559Y-MH1 from ST,ST Microelectronics

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M48T559Y-MH1

Manufacturer: ST

64 Kbit 8Kb x8 TIMEKEEPER SRAM with ADDRESS/DATA MULTIPLEXED

Partnumber Manufacturer Quantity Availability
M48T559Y-MH1,M48T559YMH1 ST 6 In Stock

Description and Introduction

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.

Application Scenarios & Design Considerations

64 Kbit 8Kb x8 TIMEKEEPER SRAM with ADDRESS/DATA MULTIPLEXED

Alternative Part Number

  • DS1556W-120+ --: Nonvolatile timekeeping RAM with integrated crystal and battery, similar 32K x 8 parallel interface and watchdog/RTC features, pin-compatible in many designs and a common drop-in replacement for ST M48T series.
  • BQ4845S-A4 --: Timekeeper SRAM with RTC, watchdog and power-fail control in a similar SOIC package; functionally equivalent to the M48T559Y and widely available from TI.
  • M48T58Y-70PC1 --: Same ST TIMEKEEPER family with 32K x 8 nonvolatile SRAM and RTC, offering equivalent functionality and timing; useful when staying within the ST ecosystem is preferred.

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