| The M41T83/93 and M41T82 serial real-time clocks are the next
generation of timekeeping devices for the industry’s broadest
portfolio. Fitting right in the middle of our current product offering,
they feature a reset output and battery monitoring as well as a
new function, analog calibration. The M41T83 and M41T93 are the
higher end of the new offering and include the choice of 400 kHz
I²C (T83) or 10 MHz SPI (T93). The lower cost M41T82 employs
400 kHz I²C.
The greatest advance is the analog calibration feature pre-programmed
at the factory. Available with the SOX18 embedded crystal package
option, users can get pre-calibrated parts accurate to ±12
seconds per month (±5 ppm; at room temperature).
A second, non-volatile analog calibration register, is also included.
This allows the user to program his own analog calibration value,
either with the QFN package option, or to override the factory
value in the SOX18 package. Adjustments made to the oscillator
will immediately appear in the test output
giving users instantaneous feedback that the correction has taken
effect.
|
| M41T82/83/93 Family Features |
 |
Accuracy of +/- 5 PPM (with embedded crystal package), can
be calibrated to +/- 2 PPM |
|
2.0 V to 5.5 V clock operating voltage |
|
Ultra-low battery supply current of 365 nA |
|
Counters for tenths/hundredths of seconds, seconds, minutes,
hours, day, date, month, year, and century |
|
Programmable clock calibration (analog and digital) |
|
Automatic switchover and reset output circuitry (fixed reference)
M41T83S: VCC = 3.00 V to 5.50 V, (2.85 V = VRST = 3.00
V)
M41T83R: VCC = 2.70 V to 5.50 V, (2.55 V = VRST = 2.70
V)
M41T83Z: VCC = 2.38 V to 5.50 V, (2.25 V = VRST = 2.38
V) |
|
Serial interface supports I²C Bus (400 kHz protocol) |
|
Programmable alarm with interrupt function (valid even during
battery back-up mode) |
|
Optional 2nd programmable alarm available |
|
Square wave output defaults to 32 kHz on power-up (M41T83
only) |
|
RESET (RST) output |
|
Watchdog timer |
|
Programmable 8-bit counter/timer |
|
7 bytes of battery-backed user SRAM |
|
Battery low flag |
|
Power-down time stamp (HT bit) |
|
Low operating current of 80 µA
Oscillator stop detection
Battery or Super-cap™ back-up
Operating temperature of -40°C to 85°C
Package options include:
- a 16-lead QFN (M41T83),
- an 18-lead embedded crystal SOIC(M41T83), or
- an 8-lead SOIC (M41T82)
RoHS compliance: lead-free components are compliant with the RoHS directive
|
|
| |
| |
|
|
|
