3.3V-5V TIMEKEEPER CONTROLLER The M48T201V is a timekeeping SRAM manufactured by STMicroelectronics (ST). Below are the factual specifications, descriptions, and features:
### **Specifications:**
- **Memory Type:** Non-volatile SRAM (NVSRAM) with integrated real-time clock (RTC)
- **Memory Capacity:** 128 Kb (16 KB)
- **Organization:** 16K x 8 bits
- **Supply Voltage:** 4.5V to 5.5V
- **Operating Temperature Range:** 0°C to +70°C (Commercial)
- **Data Retention:** Minimum 10 years in the absence of power
- **Clock Accuracy:** ±1 minute per month at 25°C
- **Interface:** Parallel (8-bit data bus)
- **Package:** 28-pin DIP (Dual In-line Package)
### **Descriptions:**
- The M48T201V combines a static RAM with a battery-backed real-time clock and power-fail control circuitry.
- It provides non-volatile storage of data and timekeeping functions when external power is lost.
- The integrated lithium energy source ensures data retention without external backup batteries.
### **Features:**
- **Automatic Power-Fail Chip Deselect:** Protects data during power loss.
- **Battery Backup:** Built-in lithium cell maintains SRAM and RTC operation.
- **Real-Time Clock (RTC):** Tracks seconds, minutes, hours, day, date, month, and year (including leap years).
- **Low Power Consumption:** Optimized for battery-backed applications.
- **Industrial Standard Pinout:** Compatible with JEDEC-standard SRAMs.
- **Write Protection:** Prevents accidental writes to critical memory areas.
This information is sourced from the manufacturer's datasheet and technical documentation.
