M41T93SQA6F
Real Time Clock Serial 32byte Clock/Calendar/Alarm/Battery Backup/Interrupt 16-Pin QFN T/R
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Part Number : M41T93SQA6F
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Package/Case : QFN
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Brands : STMicroelectronics
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Components Categories : Real Time Clocks
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Datesheet : M41T93SQA6F DataSheet (PDF)
Overview of M41T93SQA6F
The M41T93 is a low-power serial SPI bus real-time clock (RTC) with a built-in 32.768 kHz oscillator (external crystal-controlled for the QFN16 package, and embedded crystal for the SOX18 package). Eight bytes of the register map are used for the clock/calendar function and are configured in binary coded decimal (BCD) format. An additional 17 bytes of the register map provide status/control of the two alarms, watchdog, 8-bit counter, and square wave functions. An additional seven bytes are made available as user SRAM.Addresses and data are transferred serially via a serial SPI bus-compatible interface. The built-in address register is incremented automatically after each WRITE or READ data byte. The M41T93 has a built-in power sense circuit which detects power failures and automatically switches to the battery supply when a power failure occurs. The energy needed to sustain the clock operations can be supplied by a small lithium button battery when a power failure occurs.Functions available to the user include a non-volatile, time-of-day clock/calendar, alarm interrupt, watchdog timer, programmable 8-bit counter, and square wave outputs. The eight clock address locations contain the century, year, month, date, day, hour, minute, second, and tenths/hundredths of a second in 24-hour BCD format. Corrections for 28, 29 (leap year), 30, and 31 day months are made automatically. The M41T93 is supplied in either a QFN16 or an SOX18, 300 mil SOIC which includes an embedded 32 KHz crystal. The SOX18 package requires only a user-supplied battery to provide non-volatile operation.
Key Features
- Ultra-low battery supply current of 365 nA
- Factory calibrated accuracy ±5 ppm typical after 2 reflows (SOX18) (much better accuracies are achievable using built-in programmable analog and digital calibration circuits)
- 2.0 V to 5.5 V clock operating voltage
- Counters for tenths/hundredths of seconds, seconds, minutes, hours, day, date, month, year, and century
- Automatic switchover and reset output circuitry (fixed reference): M41T93S: VCC= 3.0 V to 5.5 V; M41T93R: VCC= 2.7 V to 5.5 V; M41T93Z: VCC= 2.38 V to 5.50 V
- Compatible with SPI bus serial interface (supports SPI mode 0 [CPOL = 0, CPHA = 0])
- Programmable alarm with interrupt function (valid even during battery backup mode)
- Optional 2ndprogrammable alarm available
- Square wave output (defaults to 32 KHz on power-up)
- RESET (RST) output
- Watchdog timer
- Programmable 8-bit counter/timer
- 7 bytes of battery-backed user SRAM
- Battery low flag
- Low operating current of 80 μA
- Oscillator stop detection
- Battery or supercapacitor backup
- Operating temperature of –40 °C to +85 °C
- Package options include a 16-lead QFN and an 18-lead embedded crystal SOIC
Specifications
The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.
Product Status | Active | Programmabe | Not Verified |
Type | Clock/Calendar | Features | Alarm, Leap Year, Square Wave Output, SRAM, Watchdog Timer |
Memory Size | 7B | Time Format | HH:MM:SS:hh |
Date Format | YY-MM-DD-dd | Interface | SPI |
Voltage - Supply | 3V ~ 5.5V | Voltage - Supply, Battery | 1.8V ~ 5.5V |
Current - Timekeeping (Max) | 10µA @ 5.5V | Operating Temperature | -40°C ~ 85°C |
Mounting Type | Surface Mount | Package / Case | QFN-16 |
Supplier Device Package | 16-QFN (4x4) | Base Product Number | M41T93 |
Manufacturer | STMicroelectronics | Product Category | Real Time Clock |
RoHS | Details | Mounting Style | SMD/SMT |
RTC Bus Interface | Serial, SPI | Battery Backup Switching | Backup Switching |
RTC Memory Size | 32 B | Supply Voltage - Max | 5.5 V |
Supply Voltage - Min | 3 V | Minimum Operating Temperature | - 40 C |
Maximum Operating Temperature | + 85 C | Brand | STMicroelectronics |
Function | Alarm, Calendar, Clock, Interrupt | Product Type | Real Time Clocks |
Series | M41T93 | Factory Pack Quantity | 1000 |
Subcategory | Clock & Timer ICs | Unit Weight | 0.002014 oz |
Warranty & Returns
Warranty, Returns, and Additional Information
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QA & Return Policy
Parts Quality Guarantee: 365 days
Returns for refund: within 90 days
Returns for Exchange: within 90 days
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