ST Manuals

M41T94 is a low-power clock chip produced by ST company. Its main features are 44 bytes of NVRAM and reset function, as well as 32KHz crystal oscillator, ultra-low battery supply current, automatic switching and deselection circuit, programmable alarm and interrupt function, accurate programmable watchdog timer, microprocessor power-on reset, choice of power-fail deselect voltage, etc.

M41ST85W is a 3.0/3.3 V I2C combination serial RTC, NVRAM supervisor and microprocessor supervisor. It features automatic battery switchover and WRITE protection for internal serial RTC and external low power SRAM (LPSRAM). It also features 400 kHz I2C serial interface, 3.0/3.3 V operating voltage VCC=2.7 to 3.6 V, ultralow battery supply current of 500 nA (max), RoHS compliant, lead-free second level interconnect and so on.

M48T37Y, M48T37V is an integrated ultra low power SRAM, real-time clock, power-fail control circuit, and battery product produced by ST company. It has frequency test output, automatic power-fail chip deselect and WRITE protection, watchdog timer and other functions.

M48T35AV 3.3 V, 256 Kbit (32 Kbit x 8) TIMEKEEPER® SRAM is an integrated, ultra low power SRAM, real-time clock, power-fail control circuit and battery.

The M41T56 is a 32 KHz serial real-time clock (RTC) with 56 bytes NVRAM

This document describes the features and characteristics of a serial real-time clock (RTC) product called M41T11. The product includes counters for seconds, minutes, hours, day, date, month, years, and century, a 32KHz crystal oscillator, support for I2C bus, and ultra-low battery supply current.

M41T00 is a low power serial real-time clock with a built-in 32.768 kHz oscillator. It features counters for seconds, minutes, hours, day, month, years, and century, supports I2C bus (100 kHz protocol), operates at a clock voltage of 2.0 to 5.5 V, has an ultra low battery supply current of 0.8 µA, and includes automatic switchover and deselect circuitry, software clock calibration, and automatic leap year compensation.

This document introduces the features and characteristics of M48T201Y M48T201V 5.0 or 3.3 V TIMEKEEPER® supervisor, including integrated real time clock, power-fail control circuit, battery and crystal, watchdog timer, choice of write protect voltages etc.

This document describes the features and characteristics of the TS556 low-power dual CMOS timer, revised in October 2008. It includes very low power consumption, high maximum astable frequency, wide voltage range, reduced supply current spikes during output transitions, high input impedance, and pin-to-pin and functionally compatibility with the bipolar NE556.

TS555 is a single chip CMOS timer with ultra low power consumption, high frequency, wide voltage range, TTL, CMOS and logic MOS compatible output.

M48T35 and M48T35Y are products that integrate ultra-low-power SRAM, real-time clock, power-fail control circuit, and battery. They have BYTEWIDE RAM-like clock access, BCD-coded year, month, day, date, hours, minutes, and seconds, frequency test output for the real-time clock, automatic power-fail chip deselect, and WRITE protection.

The document describes the features and characteristics of the M48T58 and M48T58Y products, including integrated ultra low-power SRAM, real-time clock, power-fail control circuit, and battery. It also includes BCD coded year, month, day, date, hours, minutes, and seconds, frequency test output for real-time clock, automatic power-fail chip deselect and WRITE protection, WRITE protect voltages, self-contained battery and crystal in the CAPHAT™ DIP package, packaging options, and pin and function compatibility with JEDEC standard 8 Kb x 8 SRAMs.

M48T08 is a 5V, 64 Kbit (8 Kb x 8) TIMEKEEPER® SRAM that integrates ultra-low power SRAM, real-time clock, power-fail control circuit, and battery. It features BYTEWIDE™ RAM-like clock access, BCD coded year, month, day, date, hours, minutes, and seconds, typical clock accuracy of ±1 minute a month at 25°C, automatic power-fail chip deselect and WRITE protection, software controlled clock calibration for high accuracy applications, and a self-contained battery and crystal in the CAPHAT™ DIP package.