Datasheet > M41T93_11

M41T93_11

更新时间： 2024-11-12 12:23:11

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		电池时钟
页数	文件大小	规格书
51页	787K
描述
Serial SPI bus real-time clock with battery switchover

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中文翻译

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数据手册

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M41T93_11 数据手册

M41T93

Serial SPI bus real-time clock with battery switchover

Features

■ Ultra-low battery supply current of 365 nA

■ Factory calibrated accuracy 5 ppm

guaranteed after 2 reflows (SOX18)

– Much better accuracies achievable using

built-in programmable analog and digital

calibration circuits

QFN16, 4 mm x 4 mm

■ 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

SOX18 (18-pin, 300 mil SOIC

with embedded crystal)

■ Automatic switchover and reset output circuitry

(fixed reference)

– M41T93S: V = 3.0 V to 5.5 V

(2.85 V ≤ V

≤ 3.00 V)

RST

– M41T93R: V = 2.7 V to 5.5 V

(2.55 V ≤ V

– M41T93Z: V = 2.38 V to 5.50 V

≤ 2.70 V)

RST

■ Package options include:

– a 16-lead QFN or an 18-lead embedded

crystal SOIC

(2.25 V ≤ V

≤ 2.38 V)

RST

■ Compatible with SPI bus serial interface

■ RoHS compliance: lead-free components are

(supports SPI mode 0 [CPOL = 0, CPHA = 0])

compliant with the RoHS directive

■ Programmable alarm with interrupt function

(valid even during battery backup mode)

■ Optional 2 programmable 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 SuperCap™ backup

■ Operating temperature of –40 °C to +85 °C

October 2011

Doc ID 12615 Rev 6

1/51

www.st.com

12 3 4 5 6 7...51

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