M48T58-70PC1 STMicroelectronics, M48T58-70PC1 Datasheet
M48T58-70PC1
Specifications of M48T58-70PC1
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M48T58-70PC1 Summary of contents
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... Frequency test output for real-time clock ■ Automatic power-fail chip deselect and write protection ■ Write protect voltages (V = power-fail deselect voltage): PFD – M48T58 4. 4.5 V ≤ V ≤ 4.75 V PFD – M48T58Y 4 4.2 V ≤ V ≤ 4.5 V PFD ■ ...
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... Stopping and starting the oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 6.4 Calibrating the clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 6.5 Battery low flag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 6.6 Century bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 6.7 V noise and negative going transients . . . . . . . . . . . . . . . . . . . . . . . . . Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 9 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 10 Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 11 Environmental information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 12 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 2/33 Doc ID 2412 Rev 7 M48T58, M48T58Y ...
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... M48T58, M48T58Y List of tables Table 1. Signal names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Table 2. Operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Table 3. READ mode AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Table 4. WRITE mode AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Table 5. Register map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Table 6. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Table 7. Operating and AC measurement conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Table 8. Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Table 9. DC characteristics Table 10. Power down/up AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Table 11. ...
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... Figure 15. SH – 4-pin SNAPHAT Figure 16. SH – 4-pin SNAPHAT Figure 17. Recycling symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 4/33 ® housing for 48 mAh battery & crystal, pack. outline . . . . . . . . . . . 27 ® housing for 120 mAh battery & crystal, package outline Doc ID 2412 Rev 7 M48T58, M48T58Y ® , package outline . . . 26 ...
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... The monolithic chip is available in two special packages to provide a highly integrated battery-backed memory and real-time clock solution. The M48T58 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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... WRITE enable Supply voltage Ground A12 A11 M48T58 A10 M48T58Y DQ7 DQ0 11 18 DQ6 DQ1 12 17 DQ5 DQ2 13 16 DQ4 DQ3 A12 M48T58Y DQ0 11 18 DQ1 12 17 DQ2 Doc ID 2412 Rev 7 M48T58, M48T58Y AI01375B A11 G A10 E1 DQ7 DQ6 DQ5 DQ4 DQ3 AI01376B ...
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... M48T58, M48T58Y Figure 4. Block diagram 32,768 Hz CRYSTAL LITHIUM CELL FT OSCILLATOR AND CLOCK CHAIN POWER VOLTAGE SENSE V PFD AND SWITCHING CIRCUITRY V CC Doc ID 2412 Rev 7 Description BiPORT SRAM ARRAY A0-A12 DQ0-DQ7 8184 x 8 SRAM ARRAY AI01377C 7/33 ...
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... Operation modes As Figure 4 on page 7 oscillator of the M48T58/Y 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 1FF8h-1FFFh. The clock locations contain the century, year, month, date, day, hour, minute, and second in 24 hour BCD format (except for the century) ...
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... M48T58, M48T58Y 3 READ mode The M48T58 the READ mode whenever W (WRITE enable) is high, E1 (chip enable 1) is low, and E2 (chip enable 2) is high. The unique address specified by the 13 address inputs defines which one of the 8,192 bytes of data accessed. Valid data will be available at the data I/O pins within address access time (t signal is stable, providing that the E1, E2, and G access times are also satisfied ...
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... Chip enable 2 low to output Hi-Z E2LQZ (2) t Output enable high to output Hi-Z GHQZ t Address transition to output transition AXQX 1. Valid for ambient operating temperature: T noted pF. L 10/33 (1) Parameter = ° 4. 4.5 to 5.5 V (except where A CC Doc ID 2412 Rev 7 M48T58, M48T58Y M48T58/Y Unit Min Max ...
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... WRITE mode The M48T58 the WRITE mode whenever W and E1 are low and E2 is high. The start of a WRITE is referenced from the latter occurring falling edge E1, or the rising edge of E2. A WRITE is terminated by the earlier rising edge E1, or the falling edge of E2. ...
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... WRITE mode Figure 7. Chip enable controlled, WRITE AC waveforms A0-A12 tAVE1L E1 tAVE2H E2 W DQ0-DQ7 12/33 tAVAV VALID tAVE1H tE1LE1H tAVE2L tE2HE2L tAVWL DATA INPUT tDVE1H tDVE2L Doc ID 2412 Rev 7 M48T58, M48T58Y tE1HAX tE2LAX tE1HDX tE2LDX AI00964B ...
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... M48T58, M48T58Y Table 4. WRITE mode AC characteristics Symbol t WRITE cycle time AVAV t Address valid to WRITE enable low AVWL t Address valid to chip enable 1 low AVE1L t Address valid to chip enable 2 high AVE2H t WRITE enable pulse width WLWH t Chip enable 1 low to chip enable 1 high E1LE1H ...
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... When V drops below V CC preserves data and powers the clock. The internal button cell will maintain data in the M48T58/Y for an accumulated period of at least 7 years when V system power returns and V supply is switched to external V plus t (min). E1 should be kept high or E2 low as V rec inadvertent WRITE cycles prior to system stabilization ...
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... The STOP bit is the MSB of the seconds register. Setting '1' stops the oscillator. The M48T58/Y is shipped from STMicroelectronics with the STOP bit set to a '1.' When reset to a '0,' the M48T58/Y oscillator starts within 1 second. ...
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... Hz. The devices are tested not to exceed 35 ppm (parts per million) oscillator frequency error at 25°C, which equates to about ±1.53 minutes per month. With the calibration bits properly set, the accuracy of each M48T58/Y improves to better than +1/–2 ppm at 25°C. The oscillation rate of any crystal changes with temperature (see Most clock chips compensate for crystal frequency and temperature shift error with cumbersome “ ...
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... Two methods are available for ascertaining how much calibration a given M48T58/Y may require. The first involves simply setting the clock, letting it run for a month and comparing known accurate reference (like WWV broadcasts) ...
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... Clock operations Figure 8. Crystal accuracy across temperature ppm 20 0 -20 -40 -60 -80 -100 0 5 Figure 9. Clock calibration NORMAL POSITIVE CALIBRATION NEGATIVE CALIBRATION 18/33 ΔF = -0.038 ppm 2 ± 10 ° Doc ID 2412 Rev 7 M48T58, M48T58Y ° AI02124 AI00594B ...
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... This will cause the clock to lose time during the interval the SNAPHAT disconnected. Note: Battery monitoring is a useful technique only when performed periodically. The M48T58/Y only monitors the battery when a nominal V which require extensive durations in the battery back-up mode should be powered-up periodically (at least once every few months) in order for this technique to be beneficial ...
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... MBRS120T3 is recommended for surface mount. Figure 10. Supply voltage protection 20/33 bus. These transients can be reduced if CC that drive it to values below (cathode connected 0.1µF Doc ID 2412 Rev 7 M48T58, M48T58Y bus. The energy stored in the much anode Schottky diode DEVICE V SS AI02169 ...
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... M48T58, M48T58Y 7 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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... M48T58 ) 4. 100 L ≤ 1.5 5V 1.9kΩ DEVICE UNDER TEST 1kΩ includes JIG capacitance (1)(2) Parameter Input capacitance Output capacitance Doc ID 2412 Rev 7 M48T58, M48T58Y M48T58Y 4 100 ≤ 1.5 OUT 100pF or 5pF Min Max - Table 7. Unit V ° ...
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... M48T58, M48T58Y Table 9. DC characteristics Symbol Parameter I Input leakage current LI (2) I Output leakage current LO I Supply current CC I Supply current (standby) TTL CC1 Supply current (standby) I CC2 CMOS V Input low voltage IL V Input high voltage IH Output low voltage V OL Output low voltage (FT) ...
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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 M48T58 M48T58Y = ° Doc ID 2412 Rev 7 M48T58, M48T58Y Min Max 0 300 M48T58 10 M48T58Y 200 = 4. 4.5 to 5.5 V (except where CC Min Typ Max 4 ...
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... M48T58, M48T58Y 9 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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... Doc ID 2412 Rev 7 M48T58, M48T58Y inches Typ Min 0.002 0.092 0.014 0.006 0.697 0.324 0.050 – 0.126 0.453 0.016 0° 28 ® ...
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... M48T58, M48T58Y Figure 15. SH – 4-pin SNAPHAT Note: Drawing is not to scale. Table 14. SH – 4-pin SNAPHAT data Symb ® housing for 48 mAh battery & crystal, pack. outline ® housing for 48 mAh battery & crystal, package mech. 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 Doc ID 2412 Rev 7 M48T58, M48T58Y SHTK-A inches Typ Min Max 0.415 0.315 0.335 0.285 0.315 0.015 0.018 0.022 0.835 0.860 0.680 ...
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... TR = Tape & reel (not for new design - use F) For PCDIP28: blank = Tubes 1. The M48T58 part is offered with the PCDIP28 (e.g., CAPHAT™) package only. 2. The SOIC package (SOH28) requires the SNAPHAT the part number “M4TXX-BR12SH” in plastic tube or “M4TXX-BR12SHTR” in Tape & Reel form (see Table 17) ...
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... Part numbering Table 17. SNAPHAT Part number M4T28-BR12SH M4T32-BR12SH 30/33 ® battery table Description Lithium battery (48 mAh) SNAPHAT Lithium battery (120 mAh) SNAPHAT Doc ID 2412 Rev 7 M48T58, M48T58Y Package ® SH ® SH ...
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... M48T58, M48T58Y 11 Environmental information Figure 17. 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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... Reformatted; update lead-free packaging information Reformatted; added lead-free second level interconnect information to 5 cover page and Section 9: Package mechanical UpdatedTable 6, Section 9: Package mechanical 6 Environmental information; minor reformatting. 7 Reformatted document; updated Doc ID 2412 Rev 7 M48T58, M48T58Y Changes (Table 10, Figure 12) (Table 10, 11) (Table 6) (Table 11) (Table 6, 16) data ...
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... M48T58, M48T58Y 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. ...