M41T00SC64MY6E

M41T00SC64 Real-Time Clock + 64Kbit (8192 x 8) EEPROM Features ■ 2.7V to 5.5V supply voltage ■ I2C bus compatible ■ Operating temperature of –40 to 85°C ■ Packaging includes: – 18-lead SOIC (with embedded crystal) ■ RoHS compliant c u d o r P 18 e t e Serial RTC features (M41T00S) ■ l o s Counters for seconds, minutes, hours, day, date, month, years, and century b O - ■ Embedded crystal package ■ Software clock calibration ■ Factory calibrated to ± 5ppm ■ Automatic power-fail detect and switch-over circuitry ■ Ultra-low battery supply current of 600nA (typ) ■ Automatic leap year compensation ■ Special software programmable output ■ Two-wire I2C serial interface supports 400kHz protocol P e et ) s t( c u d ro l o s ) s t( Embedded crystal l o bs ) s t( 1 c u d o r SOX18(MY) 18-pin (300mil) SOIC P e et O ) s ( t c u d o r eP Serial EEPROM features (M24C64) Ob ■ 8192 bytes of general purpose EEPROM (more than 1E6 erase/write cycles) ■ Two-wire I2C serial interface supports 400kHz protocol t e ol s b O ■ Byte and page write (up to 32 bytes) ■ More than 40 year data retention ■ Self-timed programming cycle January 2007 Rev 3 1/19 www.st.com 1 Contents M41T00SC64 Contents 1 Summary description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.1 2 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.1 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.2 Pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 ) s t( c u d 3 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4.1 o r P ) s t( Serial RTC device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 e t e c u 5 Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .d . . . . . . . . . . 10 o b r P O 6 DC and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 e t ) le s 7 Package mechanicalt( data . . . . . . . . . . .o . . . . . . . . . . . . . . . . . . . . . . . . . 15 s c b u 8 Order codes d . . . . . . . . . . . . . . .O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 o r ) P 9 Revision history . . . ( . .s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 t e t c u le d o o s r b P O e t e l o s b O 4.2 2/19 EEPROM device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 l o s M41T00SC64 List of tables List of tables Table 1. Table 2. Table 3. Table 4. Table 5. Table 6. Table 7. Table 8. Table 9. Table 10. Table 11. Signal names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Device select code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Operating and AC measurement conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Capacitance and input parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 DC characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 AC characteristics, (serial RTC, M41T00S) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 AC characteristics (serial EEPROM, M24C64). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 SOX18 – 18-lead plastic small outline, 300mils, embedded crystal, package mech. . . . . . 16 Ordering information scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 ) s t( c u d e t e l o s ) s t( c u d ro P e et l o s Ob b O - l o bs o r P ) s t( c u d o r P e et O ) s ( t c u d o r eP t e ol s b O 3/19 List of figures M41T00SC64 List of figures Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Figure 7. Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 18-pin SOIC connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Crystal accuracy across temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 AC measurement I/O waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 AC Bus timing requirements sequence (serial RTC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 SOX18 – 18-lead plastic small outline, 300mils, embedded crystal . . . . . . . . . . . . . . . . . . 16 ) s t( c u d e t e l o s ) s t( c u d ro P e et l o s Ob s b O t e ol 4/19 l o bs O ) s ( t c u d o r eP b O - o r P P e et c u d o r ) s t( M41T00SC64 1 Summary description Summary description The M41T00SC64 is a low power, Serial Real Time Clock plus a 64Kb EEPROM (see Figure 3). A built-in 32,768Hz oscillator (crystal controlled) and the first 8 bytes of the RAM are used for the clock/calendar function and are configured in binary coded decimal (BCD) format. Addresses and data are transferred serially via a two-line, bi-directional bus. The built-in address register is incremented automatically after each WRITE or READ data byte. The M41T00SC64 clock has a built-in power sense circuit which detects power failures and automatically switches to the battery supply during power failures. The energy needed to sustain the clock operations can be supplied from a small lithium coin cell. ) s t( Typical data retention time for the Serial RTC is in excess of 9.5 years with a 50mAh, 3V lithium cell. The M41T00SC64 is supplied in an 18-lead Plastic SOIC package. 1.1 c u d Calibration o r P ) s t( As the crystal is molded together with the silicon in this package, ST can program the appropriate calibration value necessary to achieve ±5 ppm accuracy at 25°C after two SMT reflows (see Figure 4). This calibration value will be written into address 1550h of the EEPROM. This clock accuracy can then be guaranteed to drift no more than ±3 ppm the first year, and ±1 ppm for each following year due to crystal aging. e t e l o s Figure 1. Logic diagram ) s t( c u d ro eP let so Ob o r eP t e l o s Ob c u d t(s E1 E2 l o bs VCC O ) SCL E0 b O - VBAT M41T00S + M24C64 (EEPROM) c u d o r P e et SDA FT/OUT(1) WC VSS AI09123 1. Open drain output 5/19 Pin settings M41T00SC64 2 Pin settings 2.1 Pin description Table 1. Signal names FT/OUT (1) Frequency test / output driver (open drain) SDA Serial data address input / output SCL Serial clock WC Write control E0, E1, E2 Chip enables VBAT Battery supply voltage VCC Supply voltage VSS Ground NC (2) No connect NF (3) No function 1. Open drain output ) s t( c u d e t e l o s b O - 2. No connect (NC) pins should be tied to VSS. o r P ) s t( c u d o r P e et 3. No function (NF) pins should be tied to VSS. Pins 2 and 3, and pins 16 and 17 are internally shorted together. ) l s ( o t 2.2 Pin connections s c b u d O o r ) P s t( e t c u le d o o s r b P O e t e l o s b O Figure 2. 18-pin SOIC connection (1) NC NF(2) NF(2) NC(1) E0 E1 E2 VBAT VSS 18 1 2 17 3 16 4 M41T00S 15 + 5 14 M24C64 6 13 (EEPROM) 7 12 8 11 9 10 (1) NC NF(2) NF(2) VCC NC(1) FT/OUT(3) WC SCL SDA AI09124 1. No connect (NC) pins should be tied to VSS. 2. No function (NF) pins should be tied to VSS. Pins 2 and 3, and pins 16 and 17 are internally shorted together. 3. Open drain output. 6/19 M41T00SC64 Application 3 Application Figure 3. Block diagram 1 Hz OSCILLATOR 32.768 kHz SECONDS MINUTES DIVIDER CENTURY/HOURS DAY FT/OUT DATE MONTH VOLTAGE SENSE and SWITCH CIRCUITRY VCC VSS VBAT CONTROL c u d E0 E1 E2 SCL SERIAL BUS INTERFACE l o s ) s ( Figure 4. t c u 20 d o r P e et ol O –20 –60 Ob t e l o s –80 ) s t( c u d o r M24C64 8192 x8 (EEPROM) eP AI09125 t e l o s b O ) o r eP –40 o r P s ( t c u d 0 bs b O - Crystal accuracy across temperature Frequency (ppm) e t e ADDRESS REGISTER SDA ) s t( YEAR CONTROL LOGIC ΔF = offset + K x (T – 25)2 F 2 K = –0.034 ppm/°C ± 0.004 ppm/°C –100 2 offset = 6 ppm ± 6 ppm –120 –140 –160 –40 –30 –20 –10 0 10 20 30 40 50 60 70 80 Temperature °C AI09159 7/19 Application M41T00SC64 Table 2. Device select code Device type identifier(1) Chip enable address(2) RW b7 b6 b5 b4 b3 b2 b1 b0 M24C64 1 0 1 0 E2 E1 E0 RW M41T00S 1 1 0 1 0 0 0 RW 1. The most significant bit, b7, is sent first. 2. E0, E1, and E2 are compared against the respective external pins on the memory device. ) s t( c u d e t e l o s ) s t( c u d ro P e et l o s Ob s b O t e ol 8/19 l o bs O ) s ( t c u d o r eP b O - o r P P e et c u d o r ) s t( M41T00SC64 Operation 4 Operation 4.1 Serial RTC device The M41T00SC64 contains one Serial RTC (M41T00S). For detailed information on how to use the devices, see the M41T00S datasheet, which is available from your local STMicroelectronics distributor or from the STMicroelectronics website, http://www.st.com/rtc/. 4.2 ) s t( EEPROM device The M41T00SC64 contains a 64 Kbit Serial EEPROM (M24C64). For detailed information on how to use the devices, see the M24C64 datasheet, which is available from your local STMicroelectronics distributor or from the STMicroelectronics website, http://www.st.com/eeprom/. c u d e t e l o s ) s t( c u d ro P e et l o s Ob b O - l o bs o r P ) s t( c u d o r P e et O ) s ( t c u d o r eP t e ol s b O 9/19 Maximum rating 5 M41T00SC64 Maximum rating Stressing the device above the rating listed in the “absolute maximum ratings” table may cause permanent damage to the device. These are stress ratings only and operation of the device at these or any other conditions above those indicated in the Operating sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Refer also to the STMicroelectronics SURE program and other relevant quality documents. Table 3. Absolute maximum ratings Symbol TA Parameter TSTG Ambient operating temperature –40 to 85 Storage temperature (VCC off, oscillator off) –55 to 125 VIO Input or output voltages VCC Supply voltage IO Output current PD Power dissipation c u d °C °C 240 eP t e l o s b O Unit ro Lead solder temperature for 10 seconds TSLD(1) ) s t( Value °C ) s t( –0.3 to 6.5 –0.3 to 6.5 P e et c u d o r 20 0.25 V V mA W 1. For SOX18 package, Lead-free (Pb-free) lead finish: Reflow at peak temperature of 240°C (total thermal budget not to exceed 180°C for between 90 to 150 seconds). No direct exposure to infrared (IR) reflow, or IR preheat allowed, to avoid damaging the embedded 32KHz crystal. Caution: )- s ( t c u d o r P e t e l o O ) s ( t c u d o s r b P O e t e l o s b O 10/19 l o bs Negative undershoots below –0.3V are not allowed on any pin while in the battery back-up mode. M41T00SC64 6 DC and AC parameters DC and AC parameters This section summarizes the operating and measurement conditions, as well as the DC and AC characteristics of the device. The parameters in the following DC and AC characteristic tables are derived from tests performed under the measurement conditions listed in the relevant tables. Designers should check that the operating conditions in their projects match the measurement conditions when using the quoted parameters. Table 4. Operating and AC measurement conditions(1) Parameter Value Supply voltage (VCC) 2.7 to 5.5 Ambient operating temperature (TA) –40 to 85 100 Input rise and fall times