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M41T93RQA6F, M41T94, M41T94MH6E

Table of contents:
Info of M41T93RQA6F
Info of M41T94
Info of M41T94MH6E

M41T93RQA6F, M41T94, M41T94MH6E Selling Leads, Datasheet

MFG:STMicroelectronics Category:Integrated Circuits (ICs) Package Cooled:Original and new, Special price! D/C:09+

M41T93RQA6F, M41T94, M41T94MH6E Datasheet download

Five Points

Part Number: M41T93RQA6F

Category: Integrated Circuits (ICs)

MFG: STMicroelectronics

Package Cooled: Original and new, Special price!

D/C: 09+

Description: IC RTC SRAM SERIAL 512BIT 28SOIC

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M41T93RQA6F Parameters

Technical/Catalog Information	M41T93RQA6F
Vendor	STMicroelectronics (VA)
Category	Integrated Circuits (ICs)
Date Format	YY-MM-DD-dd
Time Format	HH:MM:SS:hh (24 hr)
Voltage - Supply	2.7 V ~ 5.5 V
Interface	SPI, 3-Wire Serial
Memory Size	-
Package / Case	16-QFN
Packaging	Digi-Reel?
Type	Clock/Calendar/Alarm
Operating Temperature	-40°C ~ 85°C
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	M41T93RQA6F M41T93RQA6F 497 6302 6 ND 49763026ND 497-6302-6

M41T94 General Description

The M41T94 Serial TIMEKEEPER^® SRAM is a low power, 512-bit static CMOS SRAM organized as 64 words by 8 bits. A built-in 32,768 Hz oscillator (external crystal controlled) and 8 bytes of the SRAM (see Table 10, page 17) are used for the clock/calendar function and are configured in binary coded decimal (BCD) format.

An additional 12 bytes of RAM provide status/control of Alarm, Watchdog and Square Wave functions. Addresses and data are transferred serially via a serial SPI interface. The built-in address register is incremented automatically after each WRITE or READ data byte. The M41T94 has a built-in power sense circuit which detects power failures and automatically switches to the battery supply when a power failure occurs. The energy needed to sustain the SRAM and clock operations can be supplied by a small lithium button-cell supply when a power failure occurs. Functions available to the user include a non-volatile, time-of-day clock/calendar, Alarm interrupts, Watchdog Timer and programmable Square Wave output. Other features include a Power-On Reset as well as two additional debounced inputs (RSTIN1 and RSTIN2) which can also generate an output Reset (RST). 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 - valid until year 2100), 30 and 31 day months are made automatically. The ninth clock address location controls user access to the clock information and also stores the clock software calibration setting.

The M41T94 is supplied in either a 16-lead plastic SOIC (requiring user supplied crystal and battery) or a 28-lead SOIC SNAPHAT^® package (which integrates both crystal and battery in a single SNAPHAT top). The 28-pin, 330mil SOIC provides sockets with gold plated contacts at both ends for direct connection to a separate SNAPHAT housing containing the battery and crystal. The unique design allows the SNAPHAT battery/crystal package to be mounted on top of the SOIC package after the completion of the surface mount process.

Insertion of the SNAPHAT housing after reflow prevents potential battery and crystal damage due to the high temperatures required for device surface- mounting. The SNAPHAT housing is also keyed to prevent reverse insertion.

The SOIC and battery/crystal packages are shipped separately in plastic anti-static tubes or in Tape & Reel form. For the 28-lead SOIC, the battery/ crystal package (e.g., SNAPHAT) part number is "M4TXX-BR12SH" (see Table 21, page 29). Caution: Do not place the SNAPHAT battery/crystal top in conductive foam, as this will drain the lithium button-cell battery.

M41T94 Maximum Ratings

Symbol	Parameter		Value	Unit
T_STG	Storage Temperature (V_CC Off, Oscillator Off)	SNAPHAT	40 to 85
T_STG	Storage Temperature (V_CC Off, Oscillator Off)	SOIC	55 to 125
V_CC	Supply Voltage		0.3 to 7	V
T_SLD⁽¹⁾	Lead Solder Temperature for 10 seconds		260
V_IO	Input or Output Voltages		0.3 to V_CC +0.3	V
I_O	Output Current		20	mA
P_D	Power Dissipation		1	W

Note: 1. Reflow at peak temperature of 215°C to 225°C for < 60 seconds (total thermal budget not to exceed 180°C for between 90 to 120 seconds).
CAUTION: Negative undershoots below 0.3V are not allowed on any pin while in the Battery Back-up mode.
CAUTION: Do NOT wave solder SOIC to avoid damaging SNAPHAT sockets.

M41T94 Features

` 2.7 TO 5.5V OPERATING VOLTAGE
` SERIAL PERIPHERAL INTERFACE (SPI)
` 2.5 TO 5.5V OSCILLATOR OPERATING VOLTAGE
` AUTOMATIC SWITCH-OVER and DESELECT CIRCUITRY
` CHOICE OF POWER-FAIL DESELECT VOLTAGES (V_CC = 2.7 to 5.5V):
    THS = V_SS; 2.55V V_PFD 2.70V
    THS = V_CC; 4.20V V_PFD 4.50V
` COUNTERS FOR TENTHS/HUNDREDTHS OF SECONDS, SECONDS, MINUTES, HOURS, DAY, DATE, MONTH, YEAR, and
CENTURY
` 44 BYTES OF GENERAL PURPOSE RAM
` PROGRAMMABLE ALARM and INTERRUPT
    FUNCTION (VALID EVEN DURING BATTERY BACK-UP MODE)
` WATCHDOG TIMER
` MICROPROCESSOR POWER-ON RESET
` BATTERY LOW FLAG
` LOW OPERATING CURRENT OF 2.0mA
` ULTRA-LOW BATTERY SUPPLY CURRENT OF 500nA (MAX)
` PACKAGING INCLUDES A 28-LEAD SOIC and SNAPHAT^®TOP (to be ordered separately) or 16-LEAD SOIC
` 28-LEAD SOIC PACKAGE PROVIDES
    DIRECT CONNECTION FOR A SNAPHAT
    TOP WHICH CONTAINS THE BATTERY and CRYSTAL

M41T94 Connection Diagram

M41T94MH6E Parameters

Technical/Catalog Information	M41T94MH6E
Vendor	STMicroelectronics
Category	Integrated Circuits (ICs)
Date Format	YY-MM-DD-dd
Time Format	HH:MM:SS:hh (24 hr)
Voltage - Supply	2.7 V ~ 5.5 V
Interface	SPI, 3-Wire Serial
Memory Size	44B
Package / Case	28-SOIC, 28-SOH (8.48mm Width)
Packaging	Tube
Type	Clock/Calendar/Alarm
Operating Temperature	-40°C ~ 85°C
Drawing Number	*
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	M41T94MH6E M41T94MH6E 497 2823 5 ND 49728235ND 497-2823-5

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