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The M41T6x is a low-power serial real-time clock (RTC) with a built-in 32.768 kHz oscillator. Eight registers are used for the clock/calendar function and are configured in binary-coded decimal (BCD) format. An additional eight registers provide status/control of alarm, 32 kHz output, calibration, and watchdog functions. Addresses and data are transferred serially via a two-line, bidirectional I²C interface. The built-in address register is incremented automatically after each WRITE or READ data byte.
Functions available to the user include a time-of-day clock/calendar, alarm interrupts (M41T62/65), 32 kHz output (M41T62/64), programmable square wave output (M41T62/64), and watchdog output (M41T65). 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 M41T6x is supplied in two very small packages: a tiny, 3 x 3 mm 16-pin QFN which requires a user-supplied 32 kHz crystal, and an ultra-small 1.5 x 3.2 mm LCC with embedded crystal - no external crystal is required.主要特性
- Serial real-time clock (RTC) with alarm functions
- 400 kHz I²C serial interface
- Memory mapped registers for seconds, minutes, hours, day, date, month, year, and century
- Tenths/hundredths of seconds register
- 350 nA timekeeping current at 3 V
- Timekeeping down to 1.0 V
- 1.3 V to 4.4 V I²C bus operating voltage
- 4.4 V max VCCsuitable for lithium-ion battery operation
- Low operating current of 35 μA (at 400 kHz I²C speed)
- 32 kHz square wave output is on at power-up. Suitable for driving a microcontroller in low-power mode. Can be disabled. (M41T62/64)
- Programmable 1 Hz to 32 kHz square wave output (M41T62/64)
- Programmable alarm with interrupt function (M41T62/65)
- 32 kHz crystal oscillator integrates crystal load capacitors, works with high series resistance crystals
- Oscillator stop detection monitors clock operation
- Accurate programmable watchdog
- 62.5 ms to 31 minutes timeout
- Software clock calibration. Can adjust timekeeping to within ±2 parts per million (±5 seconds per month)
- Automatic leap year compensation
- –40 to +85 °C operation
- Two package options:
- Very small 3 x 3 mm, lead-free and halogen-free (ECOPACK2) 16-lead QFN
- Ultra-small 1.5 x 3.2 mm, lead-free and halogen-free (ECOPACK2) 8-pin ceramic leadless chip carrier with embedded 32 kHz crystal - no external oscillator components required (M41T62)
- Serial real-time clock (RTC) with alarm functions
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图片 产品型号 制造商 描述 
STEVAL-FET001V1 ST 面向标准DIL24插座的M41T62LC6F适配器板 产品型号面向标准DIL24插座的M41T62LC6F适配器板
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质量与可靠性
| 产品型号 | Marketing Status | 封装 | 等级规格 | 符合RoHS级别 | 材料声明** |
|---|---|---|---|---|---|
| M41T62LC6F |
批量生产
|
LCC8 3.2x1.5 mm | 工业 | Ecopack2 | |
| M41T62Q6F |
批量生产
|
VFQFPN 16 3x3x0.9 | 工业 | Ecopack2 |
(**) st.com上提供的材料声明表单可能是基于包装系列中最常用的封装的通用文档。因此，它们可能不是100%适用于特定的设备。有关特定设备的信息，请联系 销售支持 。
样片和购买
| 产品型号 | 从分销商订购 | 从ST订购 | 供货状态 | ECCN (US) | ECCN (EU) | 包装类型 | 封装 | 温度（ºC） | NVRAM size (B) | Country of Origin | Budgetary Price (US$)*/Qty | 更多信息 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 最小值 | 最大值 | |||||||||||||
| M41T62LC6F | 7 distributors | 样片和购买 立即购买 |
批量生产
|
EAR99 | NEC | Tape And Reel | LCC8 3.2x1.5 mm | -40 | 85 | - | TAIWAN | 2.3 / 1k | ||
| M41T62Q6F | 7 distributors | 样片和购买 立即购买 |
批量生产
|
EAR99 | NEC | Tape And Reel | VFQFPN 16 3x3x0.9 | -40 | 85 | - | MALAYSIA | 0.8 / 1k | ||
