M48T12-70PC1 STMicroelectronics, M48T12-70PC1 Datasheet
M48T12-70PC1
Specifications of M48T12-70PC1
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M48T12-70PC1 Summary of contents
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... WRITE protect voltages (V = Power-fail deselect voltage): PFD – M48T02 4. 4.5 V ≤ V ≤ 4.75 V PFD – M48T12 4 4.2 V ≤ V ≤ 4.5 V PFD ■ Self-contained battery and crystal in the ™ CAPHAT DIP package ■ Pin and function compatible with JEDEC standard SRAMs ■ ...
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... Setting the clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 3.3 Stopping and starting the oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 3.4 Calibrating the clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 3.5 V noise and negative going transients . . . . . . . . . . . . . . . . . . . . . . . . . Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 7 Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 8 Environmental information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 2/25 Doc ID 2410 Rev 8 M48T02, M48T12 ...
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... M48T02, M48T12 List of tables Table 1. Signal names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Table 2. Operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Table 3. READ mode AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 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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... Crystal accuracy across temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Figure 9. Clock calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Figure 10. Supply voltage protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Figure 11. AC testing load circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Figure 12. Power down/up mode AC waveforms Figure 13. PCDIP24 – 24-pin plastic DIP, battery CAPHAT™, package outline . . . . . . . . . . . . . . . . . 21 Figure 14. Recycling symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 4/25 Doc ID 2410 Rev 8 M48T02, M48T12 ...
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... M48T02, M48T12 1 Description The M48T02/12 TIMEKEEPER clock which is pin and functional compatible with the DS1642. A special 24-pin, 600 mil DIP CAPHAT quartz crystal and a long life lithium button cell to form a highly integrated battery-backed memory and real-time clock solution. The M48T02/12 button cell has sufficient capacity and storage life to maintain data and clock functionality for an accumulated time period of at least 10 years in the absence of power over the operating temperature range ...
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... DQ0 9 16 DQ1 10 15 DQ2 OSCILLATOR AND CLOCK CHAIN POWER V PFD VOLTAGE SENSE AND SWITCHING BOK CIRCUITRY V CC Doc ID 2410 Rev 8 M48T02, M48T12 A10 E DQ7 DQ6 DQ5 DQ4 DQ3 BiPORT SRAM ARRAY A0-A10 DQ0-DQ7 2040 x 8 SRAM ARRAY AI01028 AI01329 ...
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... M48T02, M48T12 2 Operation modes As Figure 3 on page 6 oscillator of the M48T02/12 are integrated on one silicon chip. The two circuits are interconnected at the upper eight memory locations to provide user accessible BYTEWIDE™ clock information in the bytes with addresses 7F8h-7FFh. The clock locations contain the year, month, date, day, hour, minute, and second in 24-hour BCD format. ...
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... AXQX tAVAV VALID tAVQV tELQV tELQX tGLQV tGLQX (1) Parameter Min = ° 4. 4.5 to 5.5 V (except where noted Doc ID 2410 Rev 8 M48T02, M48T12 tAXQX tEHQZ tGHQZ VALID M48T02/M48T12 –70 –150 –200 Max Min Max Min 70 150 200 70 ...
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... M48T02, M48T12 2.2 WRITE mode The M48T02/ the WRITE mode whenever W and E are active. The start of a WRITE is referenced from the latter occurring falling edge WRITE is terminated by the earlier rising edge The addresses must be held valid throughout the cycle must return high for a minimum the initiation of another READ or WRITE cycle ...
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... Parameter = ° falls within the V CC PFD . The M48T02/12 may respond to transient noise spikes rises, the battery voltage is checked. If the voltage is too SO CC Doc ID 2410 Rev 8 M48T02, M48T12 M48T02/M48T12 –70 –150 –200 Min Max Min Max Min Max 70 150 200 ...
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... M48T02, M48T12 Figure 7. Checking the BOK flag status POWER-UP READ DATA AT ANY ADDRESS WRITE DATA COMPLEMENT BACK TO SAME ADDRESS READ DATA AT SAME ADDRESS AGAIN IS DATA NO (BATTERY LOW) COMPLEMENT OF FIRST READ? NOTIFY SYSTEM (BATTERY OK) YES OF LOW BATTERY WRITE ORIGINAL DATA BACK TO SAME ADDRESS ...
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... See the application note AN923, “TIMEKEEPER information on century rollover. 12/25 ® registers should be halted before clock data is read to Table 5 on page 13 must be written to '0' to allow for normal ® rolling into the 21 Doc ID 2410 Rev 8 M48T02, M48T12 Table 5 on page 13). st century” for ...
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... M48T02, M48T12 Table 5. Register map Address D7 7FF 7FE 0 7FD 0 7FC 0 7FB 0 7FA 0 7F9 ST 7F8 W Keys SIGN bit FT = FREQUENCY TEST bit (set to '0' for normal clock operation READ bit W = WRITE bit ST = STOP bit 0 = Must be set to '0' 3.3 Stopping and starting the oscillator The oscillator may be stopped at any time ...
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... Note not necessary to set the WRITE bit when setting or resetting the frequency test bit (FT) or the stop bit (ST). For more information on calibration, see the application note AN924, “TIMEKEEPER calibration.” 14/25 Doc ID 2410 Rev 8 M48T02, M48T12 ® ...
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... M48T02, M48T12 Figure 8. Crystal accuracy across temperature ppm 20 0 -20 -40 ΔF = -0.038 -60 -80 -100 Figure 9. Clock calibration NORMAL POSITIVE CALIBRATION NEGATIVE CALIBRATION ppm 2 ± 10 ° Doc ID 2410 Rev 8 Clock operations ° AI02124 AI00594B 15/25 ...
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... Figure 10. Supply voltage protection 16/25 bus. These transients can be reduced if CC 16) is recommended in order to provide the needed filtering. that drive it to values below (cathode connected 0.1μF Doc ID 2410 Rev 8 M48T02, M48T12 bus. The energy stored in the much anode Schottky diode DEVICE V SS AI02169 ...
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... M48T02, M48T12 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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... Effective capacitance measured with power supply Sampled only, not 100% tested ° MHz. 3. Outputs deselected. 18/25 ) 4. DEVICE UNDER TEST 1kΩ includes JIG capacitance (1)(2) Parameter Doc ID 2410 Rev 8 M48T02, M48T12 M48T02 M48T12 4 100 100 ≤ 5 ≤ 1.5 1.5 1.8kΩ OUT 100pF Min Max - ...
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... M48T02, M48T12 Table 9. DC characteristics Symbol Parameter I Input leakage current LI (2) I Output leakage current LO I Supply current CC (3) I Supply current (standby) TTL CC1 (3) I Supply current (standby) CMOS CC2 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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... F passes V (min). CC PFD fall time of less than t may cause corruption of RAM data. FB (1)(2) Parameter M48T02 M48T12 . ° Doc ID 2410 Rev 8 M48T02, M48T12 Min Max 0 - 300 - 4. 4.5 to 5.5 V (except where CC Min Typ Max 4 ...
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... M48T02, M48T12 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. PCDIP24 – 24-pin plastic DIP, battery CAPHAT™, package outline Note: Drawing is not to scale ...
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... Not recommended for new design. Contact ST sales office for availability. For other options, or for more information on any aspect of this device, please contact the ST sales office nearest you. 22/25 M48T 02 = 4.5 to 4.75 V PFD = 4.2 to 4.5 V PFD (1) package, tubes Doc ID 2410 Rev 8 M48T02, M48T12 – ...
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... M48T02, M48T12 8 Environmental information Figure 14. Recycling symbols This product contains a non-rechargeable lithium (lithium carbon monofluoride chemistry) button cell battery fully encapsulated in the final product. 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 " ...
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... Updated template, lead-free text, removed footnote Added lead-free second level interconnect information to cover page and 6 Section 6: Package mechanical Added Section 8: Environmental 7 Package mechanical data; minor formatting changes. 8 Reformatted document; updated Doc ID 2410 Rev 8 M48T02, M48T12 Changes (Table 10, 11) Table 8, 9) 11) (Table 10) (Table 9, 13) data. ...
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... M48T02, M48T12 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. ...