M41T82 串行I2C总线的RTC电池切换

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 订购型号:

Ordering Model

Package

RoHS Compliance Grade

Marketing Status

Memory Organization

Supply Voltage(Vcc)

Supply Voltage(Vcc)

RST Threshold(VPFD)

General Description

Programmable Alarms

Watchdog Timer

Operating Range

Battery Switchover(VSO)

Battery Low Detect(BL)

Packing Type

min

max

typ

V

V

V

M41T82RM6E

SO8

Ecopack1

Active

256b (32 x 8)

2.7

5.5

2.63

Serial RTC with Battery Switchover

Yes

Yes

Industrial

Yes

Yes

Tube

M41T82RM6F

SO8

Ecopack1

Active

256b (32 x 8)

2.7

5.5

2.63

Serial RTC with Battery Switchover

Yes

Yes

Industrial

Yes

Yes

Tape And Reel

M41T82SM6E

SO8

Ecopack1

Active

256b (32 x 8)

2.7

5.5

2.93

Serial RTC with Battery Switchover

Yes

Yes

Industrial

Yes

Yes

Tube

M41T82SM6F

SO8

Ecopack1

Active

256b (32 x 8)

2.7

5.5

2.93

Serial RTC with Battery Switchover

Yes

Yes

Industrial

Yes

Yes

Tape And Reel

M41T82ZM6E

SO8

Ecopack1

Active

256b (32 x 8)

2.7

5.5

2.32

Serial RTC with Battery Switchover

Yes

Yes

Industrial

Yes

Yes

Tube

M41T82ZM6F

SO8

Ecopack1

Active

256b (32 x 8)

2.7

5.5

2.32

Serial RTC with Battery Switchover

Yes

Yes

Industrial

Yes

Yes

Tape And Reel

M41T82 产品特性:

• 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 aults 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

M41T82 技术支持与电子电路设计开发资源下载

1. M41T82 数据手册DataSheet下载.PDF
2. 相关产品选型( Excel 文档格式)
3. 非易失性RAM产品选择指南 (PDF, 800Kb)
4. 串行实时时钟选型指南
5. ST和竞争对手Atmel、Macronix、Holtek、Oki、Winbond的对照 (产品彩页, PDF)
6. RFID和射频内存产品 . PDF
7. 提升灵活性与world'sn ° 1 EEPROM的供应商. PDF
8. 意法半导体应用支持. PDF
9. 汽车级 半导体器件. PDF
10. 周围半导体 机顶盒应用. PDF