m41t56c64 STMicroelectronics, m41t56c64 Datasheet
m41t56c64
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m41t56c64 Summary of contents
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... C serial interface supports 400kHz protocol Byte and page write ( bytes) More than 40 year data retention Self-timed programming cycle September 2006 Serial Real Time Clock with 56 bytes of NVRAM + 64 Kbit (8192 bit x 8) EEPROM Rev 4 M41T56C64 Embedded crystal 18 1 SOX18(MY) 18-pin (300mil) SOIC www.st.com 1/19 1 ...
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... Contents Contents 1 Summary description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.1 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.1 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.2 Pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4.1 Serial RTC device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4.2 EEPROM device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 5 Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 8 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 2/19 M41T56C64 ...
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... M41T56C64 List of tables Table 1. Signal names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Table 2. Device select code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Table 3. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Table 4. Operating and AC measurement conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Table 5. Capacitance and input parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Table 6. DC characteristics Table 7. AC characteristics, (serial RTC, M41T56 Table 8. AC characteristics (Serial EEPROM, M24C64 Table 9. SOX18 – 18-lead plastic small outline, 300mils, embedded crystal, package mech Table 10 ...
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... List of figures List of figures Figure 1. Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Figure 2. 18-pin SOIC connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 3. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Figure 4. Crystal accuracy across temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Figure 5. AC measurement I/O waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Figure 6. AC Bus timing requirements sequence (serial RTC Figure 7. SOX18 – 18-lead plastic small outline, 300mils, embedded crystal . . . . . . . . . . . . . . . . . . 16 4/19 M41T56C64 ...
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... M41T56C64 1 Summary description The M41T56C64 is a low power, Serial Real Time Clock with 56 bytes of NVRAM plus a 64Kb EEPROM (see 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 ...
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... Pins 2 and 3, and pins 16 and 17 are internally shorted (1) M41T56 M24C64 (EEPROM BAT AI09124 SS Pins 2 and 3, and pins 16 and 17 are internally shorted SS. M41T56C64 ( (1) FT/OUT (3) WC SCL SDA ...
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... M41T56C64 3 Application Figure 3. Block diagram OSCILLATOR 32.768 kHz FT/OUT VOLTAGE V CC SENSE and V SS SWITCH V BAT CIRCUITRY SCL SERIAL BUS INTERFACE SDA Figure 4. Crystal accuracy across temperature Frequency (ppm –20 –40 –60 –80 –100 –120 –140 –160 – ...
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... Table 2. Device select code b7 M24C64 1 M41T56 1 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. 8/19 (1) Device type identifier M41T56C64 (2) Chip enable address ...
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... M41T56C64 4 Operation 4.1 Serial RTC device The M41T56C64 contains one Serial RTC (M41T56). For detailed information on how to use the devices, see the M41T56 datasheet, which is available from your local STMicroelectronics distributor or from the STMicroelectronics website, http://www.st.com/rtc/. 4.2 EEPROM device The M41T56C64 contains a 64 Kbit Serial EEPROM (M24C64). For detailed information on ...
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... No direct exposure to infrared (IR) reflow preheat allowed, to avoid damaging the embedded 32KHz crystal. Caution: Negative undershoots below –0.3V are not allowed on any pin while in the battery back-up mode. 10/19 Parameter off, oscillator off) CC M41T56C64 Value Unit – °C –55 to 125 °C 240 °C – ...
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... M41T56C64 6 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 ...
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... Min Typ Max 310 =400kHz c – 0.3V 100 CC –0.3 0.3V –0.45 – 0V, CC 450 550 = 3V BAT = 4.5 to 5.5V (except where noted). CC M41T56C64 Unit Unit ±3 µA ±3 µA µA 2.2 mA µ 0.4 V 3.5 ...
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... M41T56C64 Figure 6. AC Bus timing requirements sequence (serial RTC) SDA tBUF SCL P Table 7. AC characteristics, (serial RTC, M41T56) Symbol f SCL clock frequency SCL t Clock low period LOW t Clock high period HIGH t SDA and SCL rise time R t SDA and SCL fall time ...
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... Start condition set up time Start condition hold time Stop condition set up time Time between stop condition and next start condition Write time Pulse width ignored (input filter on SCL and SDA for serial EEPROM) M41T56C64 Test Min. Max. Unit condition 400 kHz ...
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... M41T56C64 7 Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK® packages. These packages have a Lead-free second level interconnect . The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label ...
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... Min Max 2.44 2.69 0.15 0.31 2.29 2.39 0.41 0.51 0.20 0.31 11.56 11.66 0.10 7.57 7.67 – – 10.16 10.52 0.51 0.81 0° 8° ddd A1 L inches Typ Min 0.096 0.096 0.090 0.016 0.008 0.457 0.455 0.298 0.050 – 0.400 0.020 0° 18 M41T56C64 Max 0.106 0.012 0.094 0.020 0.012 0.459 0.004 0.302 – 0.414 0.032 8° ...
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... M41T56C64 8 Order codes Table 10. Ordering information scheme Example: Device type M41T = Serial RTC Supply voltage and write protect voltage 4.5 to 5.5V CC EEPROM density C64 = 64 Kbit (8192 bit x 8) Package ( SOX18 Temperature range 6 = –40°C to 85°C Shipping method E = ECOPACK® package, tubes F = ECOPACK® ...
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... Clarify pin connections, maximum rating 3 Datasheet status updated to full datasheet; changed title on page 1; small text changes to Section 1: Summary in the Feature summary, reformatted Table 9; ecopack compliant; updated disclaimer 4 Added information on EEPROM density scheme M41T56C64 Description description; reformatted figure Figure 1, Figure 2, Table 2 Table 10: Ordering information and ...
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... M41T56C64 Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...