M48T35Y-70MH6 STMicroelectronics, M48T35Y-70MH6 Datasheet
M48T35Y-70MH6
Specifications of M48T35Y-70MH6
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M48T35Y-70MH6 Summary of contents
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... WRITE protect voltages (V = Power-fail deselect voltage): PFD – M48T35 4. – 4 4.75 V PFD – M48T35Y 4 – 4.2V V 4.5 V PFD ■ Self-contained battery and crystal in the CAPHAT™ DIP package ■ SOIC package provides direct connection for a ® ...
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... Setting the clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 3.3 Stopping and starting the oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 3.4 Calibrating the clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 3.5 Century bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 3.6 V noise and negative going transients . . . . . . . . . . . . . . . . . . . . . . . . . Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 7 Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 8 Environmental information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 2/30 M48T35 M48T35Y ...
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... M48T35 M48T35Y List of tables Table 1. Signal names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Table 2. Operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Table 3. Read mode AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Table 4. Write mode AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Table 5. Register map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Table 6. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Table 7. Operating and AC measurement conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Table 8. Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Table 9. DC characteristics Table 10. Power down/up AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Table 11. ...
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... Figure 16. SH – 4-pin SNAPHAT Figure 17. PMDIP28 – 28-pin plastic DIP, hybrid, package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Figure 18. Recycling symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 4/30 ® housing for 48 mAh battery & crystal, package outline ® housing for 120 mAh battery & crystal, package outline M48T35 M48T35Y ® , package outline . . . 22 ...
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... M48T35 M48T35Y 1 Description The M48T35/Y TIMEKEEPER clock. The monolithic chip is available in two special packages to provide a highly integrated battery backed-up memory and real-time clock solution. The M48T35 non-volatile pin and function equivalent to any JEDEC standard SRAM. It also easily fits into many ROM, EPROM, and EEPROM sockets, providing the non-volatility of PROMs without any requirement for special WRITE timing or limitations on the number of WRITEs that can be performed ...
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... Supply voltage Ground A14 A12 A13 A11 M48T35 A10 M48T35Y DQ7 DQ0 11 18 DQ6 DQ1 12 17 DQ5 DQ2 13 16 DQ4 DQ3 AI01621B A14 A12 A13 A11 M48T35Y A10 DQ7 DQ0 11 18 DQ6 DQ1 12 17 DQ5 DQ2 13 16 DQ4 DQ3 AI01622B M48T35 M48T35Y ...
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... M48T35 M48T35Y Figure 4. Block diagram OSCILLATOR AND 32,768 Hz CRYSTAL LITHIUM CELL VOLTAGE SENSE CLOCK CHAIN POWER V PFD AND SWITCHING CIRCUITRY V CC Description BiPORT SRAM ARRAY A0-A14 DQ0-DQ7 32,760 x 8 SRAM ARRAY AI01623 7/30 ...
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... battery backup switchover voltage after the last address input signal is stable, providing that AVQV ) or output enable access time (t ELQV , the data lines will be driven to an indeterminate state until t AVQV M48T35 M48T35Y is out falls below the DQ0-DQ7 Power X High Z Standby ...
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... M48T35 M48T35Y If the address inputs are changed while E and G remain active, output data will remain valid for output data hold time (t Figure 5. Read mode AC waveforms A0-A14 E G DQ0-DQ7 Note: WRITE enable (W) = high. Table 3. Read mode AC characteristics Symbol t READ cycle time AVAV ...
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... Address valid to chip enable low AVEL 10/30 after W falls. WLQZ tAVAV VALID tAVWH tAVEL tWLWH tAVWL tWLQZ tDVWH tAVAV VALID tAVEH tELEH tAVWL DATA INPUT tDVEH (1) Min 70 M48T35 M48T35Y tWHAX tWHQX tWHDX DATA INPUT AI00926 tEHAX tEHDX AI00927 M48T35/Y Max 0 0 Unit ...
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... M48T35 M48T35Y Table 4. Write mode AC characteristics (continued) Symbol Parameter t WRITE enable pulse width WLWH t Chip enable low to chip enable high ELEH t WRITE enable high to address transition WHAX t Chip enable high to address transition EHAX t Input valid to WRITE enable high DVWH t Input valid to chip enable high ...
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... When reset to a '0,' the M48T35/Y oscillator starts within 1 second. 12/30 ® registers (see Table 5) should be halted before clock data is ® registers. The user can then load them with must be written to '0' to allow for normal TIMEKEEPER and RAM ® Rolling Into the 21 M48T35 M48T35Y Table 5). Resetting the st Century” for ...
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... M48T35 M48T35Y Table 5. Register map Address D7 7FFFh 7FFEh 0 7FFDh 0 7FFCh 0 7FFBh 0 7FFAh 0 7FF9h ST 7FF8h W Keys SIGN bit FT = FREQUENCY TEST bit (must be set to '0' upon power for normal operation READ bit W = WRITE bit ST = STOP bit 0 = Must be set to '0' CEB = CENTURY ENABLE bit ...
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... CENTURY bit (CB). Setting CEB to a '1' will cause CB to toggle, either from a '0' to '1' or from '1' to '0' at the turn of the century (depending upon its initial state). If CEB is set to a '0,' CB will not toggle. Note: The WRITE bit must be set in order to write to the CENTURY bit. 14/30 M48T35 M48T35Y ® ...
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... M48T35 M48T35Y Figure 8. Crystal accuracy across temperature ppm 20 0 -20 -40 -60 -80 -100 0 Figure 9. Clock calibration NORMAL POSITIVE CALIBRATION NEGATIVE CALIBRATION 3.6 V noise and negative going transients CC I transients, including those produced by output switching, can produce voltage CC fluctuations, resulting in spikes on the V capacitors are used to store energy which stabilizes the V bypass capacitors will be released as low going spikes are generated or energy will be absorbed when overshoots occur. A bypass capacitor value of 0.1 µ ...
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... Clock operations 1N5817 is recommended for through hole and MBRS120T3 is recommended for surface mount. Figure 10. Supply voltage protection 16/ 0.1 F DEVICE V SS M48T35 M48T35Y AI02169 ...
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... M48T35 M48T35Y 4 Maximum ratings 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 ...
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... At 25° MHz. 3. Outputs deselected. 18/30 M48T35 ) 4. 100 1.5 DEVICE UNDER TEST includes JIG capacitance (1)(2) Parameter Input capacitance Output capacitance M48T35 M48T35Y M48T35Y 4.5 to 5.5 – 100 1.5 5V 1.9k OUT 100pF or 5pF AI01030 Min Max 10 10 Unit V ° ...
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... M48T35 M48T35Y Table 9. DC characteristics Symbol Parameter I Input leakage current LI (2) I Output leakage current LO I Supply current CC Supply current (standby) I CC1 TTL Supply current (standby) I CC2 CMOS V Input low voltage IL V Input high voltage IH V Output low voltage OL V Output high voltage OH 1 ...
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... RAM data. FB (1)(2) Parameter M48T35 M48T35Y M48T35 M48T35Y Grade 1 Grade –40 to 85° ® only, M4T28-BR12SH1 SNAPHAT ® top (recommended for industrial temperature range - grade 6 device). M48T35 M48T35Y Min Max 0 300 M48T35 10 M48T35Y 200 = 4. 4.5 to 5.5 V (except where CC Min ...
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... M48T35 M48T35Y 6 Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ® ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at: www.st.com. ® ECOPACK trademark. Figure 13. PCDIP28 – 28-pin plastic DIP, battery CAPHAT™, package outline Note: Drawing is not to scale ...
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... M48T35 M48T35Y ® , package inches Typ Min 0.002 0.092 0.014 0.006 0.697 0.324 0.050 – 0.126 0.453 0.016 0° ...
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... M48T35 M48T35Y Figure 15. SH – 4-pin SNAPHAT outline Note: Drawing is not to scale. Table 14. SH – 4-pin SNAPHAT mechanical data Symbol ® housing for 48 mAh battery & crystal, package ® housing for 48 mAh battery & crystal, package mm Typ Min Max 9.78 6.73 7 ...
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... Typ Min Max 10.54 8.00 8.51 7.24 8.00 0.38 0.46 0.56 21.21 21.84 17.27 18.03 3.20 3.61 2.03 2.29 M48T35 M48T35Y SHTK inches Typ Min 0.315 0.285 0.018 0.835 0.680 0.126 0.080 A2 Max 0.415 0.335 ...
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... M48T35 M48T35Y Figure 17. PMDIP28 – 28-pin plastic DIP, hybrid, package outline Note: Drawing is not to scale. Table 16. PMDIP28 – 28-pin plastic DIP, hybrid, package mechanical data Symbol Typ Min Max 9.27 9.53 0.38 0.43 0.58 0.20 0.33 37.34 37.85 18.03 18.80 2.29 2 ...
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... For other options, or for more information on any aspect of this device, please contact the ST sales office nearest you. 26/30 M48T 35 = 4.5 to 4.75 V PFD = 4.2 to 4.5 V PFD (3) package, tubes ® battery package which is ordered Table 18 on page 27). M48T35 M48T35Y – ...
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... M48T35 M48T35Y Table 18. SNAPHAT Part number M4T28-BR12SH M4T32-BR12SH ® battery table Description Lithium battery (48 mAh) SNAPHAT Lithium battery (120 mAh) SNAPHAT Part numbering Package ® SH ® SH 27/30 ...
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... Recycle or dispose of batteries in accordance with the battery manufacturer's instructions and local/national disposal and recycling regulations. Please refer to the following web site address for additional information regarding compliance statements and waste recycling www.st.com/rtc, then select "Lithium Battery Recycling" from "Related Topics". 28/30 M48T35 M48T35Y ...
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... M48T35 M48T35Y 9 Revision history Table 19. Document revision history Date Revision Nov- 1999 07-Feb-2000 04-Jun-2001 31-Jul-2001 06-Mar-2002 20-May-2002 26-Jun-2002 31-Mar-2003 10-Dec-2003 31-Mar-2004 05-Dec20-05 01-Aug-2007 12-Feb-2009 1 First issue 1.1 t description changed (Table DR Reformatted; temp/voltage info. added to tables 2 add century bit text 2.1 Formatting changes based on latest document reviews Add PMDIP packaging option, which is “ ...
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... Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America 30/30 Please Read Carefully: © 2009 STMicroelectronics - All rights reserved STMicroelectronics group of companies www.st.com M48T35 M48T35Y ...