Overview
The M41T93ZMY6F is a low-power serial SPI bus real-time clock (RTC) produced by STMicroelectronics. This component features a built-in 32.768 kHz oscillator, with the SOX18 package including an embedded crystal. The M41T93ZMY6F is designed for applications requiring precise timekeeping and low power consumption. It includes a range of functions such as a non-volatile time-of-day clock/calendar, programmable alarms, a watchdog timer, and a programmable 8-bit counter. The device also supports battery or supercapacitor backup, ensuring continuous operation during power failures.
Key Specifications
| Parameter | Value |
|---|---|
| Operating Voltage | 2.38 V to 5.5 V |
| Operating Temperature | –40 °C to +85 °C |
| Battery Supply Current | 365 nA |
| Operating Current | 80 μA |
| Accuracy | ±5 ppm typical after 2 reflows (SOX18) |
| Package Options | 18-lead SOX18 with embedded crystal, 16-lead QFN16 |
| Interface | Serial SPI bus (supports SPI mode 0 [CPOL = 0, CPHA = 0]) |
| User SRAM | 7 bytes of battery-backed user SRAM |
Key Features
- Ultra-low battery supply current of 365 nA
- Factory calibrated accuracy ±5 ppm typical after 2 reflows (SOX18)
- Counters for tenths/hundredths of seconds, seconds, minutes, hours, day, date, month, year, and century
- Automatic switchover and reset output circuitry
- Programmable alarm with interrupt function (valid even during battery backup mode)
- Optional second programmable alarm available
- Square wave output (defaults to 32 KHz on power-up)
- RESET (RST) output
- Watchdog timer
- Programmable 8-bit counter/timer
- Battery low flag
- Oscillator stop detection
- Battery or supercapacitor backup
Applications
The M41T93ZMY6F is suitable for a variety of applications that require precise timekeeping and low power consumption. These include:
- Industrial control systems
- Medical devices
- Consumer electronics
- Automotive systems
- IoT devices
- Data loggers and recorders
Q & A
- What is the operating voltage range of the M41T93ZMY6F?
The operating voltage range is 2.38 V to 5.5 V.
- What is the typical accuracy of the M41T93ZMY6F after 2 reflows?
The typical accuracy is ±5 ppm after 2 reflows for the SOX18 package.
- What types of packages are available for the M41T93ZMY6F?
The device is available in 18-lead SOX18 with an embedded crystal and 16-lead QFN16 packages.
- Does the M41T93ZMY6F support SPI interface?
- What is the battery supply current of the M41T93ZMY6F?
The battery supply current is 365 nA.
- Does the M41T93ZMY6F have user SRAM?
- What is the operating temperature range of the M41T93ZMY6F?
The operating temperature range is –40 °C to +85 °C.
- Does the M41T93ZMY6F have a watchdog timer?
- Can the M41T93ZMY6F be used with a supercapacitor for backup?
- Is the M41T93ZMY6F RoHS compliant?
