M48T128V-70PM1 STMICROELECTRONICS [STMicroelectronics], M48T128V-70PM1 Datasheet
M48T128V-70PM1
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M48T128V-70PM1 Summary of contents
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... WRITE protect voltages (V = power-fail deselect voltage): PFD – M48T128Y 4 4.1 V ≤ V ≤ 4.5 V PFD – M48T128V 3 2.7 V ≤ V ≤ 3.0 V PFD (contact the ST sales office for availability) ■ Conventional SRAM operation; unlimited WRITE cycles ■ Software-controlled clock calibration for high accuracy applications ■ ...
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... Setting the clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.3 Stopping and starting the oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.4 Calibrating the clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 3.5 V noise and negative going transients . . . . . . . . . . . . . . . . . . . . . . . . . Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 7 Environmental information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 8 Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 2/23 Doc ID 5746 Rev 6 M48T128Y, M48T128V ...
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... M48T128Y, M48T128V 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Table 6. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Table 7. Operating and AC measurement conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Table 8. Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Table 9. DC characteristics Table 10. Power down/up AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Table 11. ...
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... WRITE enable controlled, WRITE AC waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Figure 6. Chip enable controlled, WRITE AC waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Figure 7. Crystal accuracy across temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Figure 8. Clock calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Figure 9. Supply voltage protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Figure 10. AC testing load circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Figure 11. Power down/up mode AC waveforms Figure 12. Recycling symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 4/23 Doc ID 5746 Rev 6 M48T128Y, M48T128V ...
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... M48T128Y, M48T128V 1 Description The M48T128Y/V TIMEKEEPER time clock. The special DIP package provides a fully integrated battery-backed memory and real-time clock solution. The M48T128Y/V directly replaces industry standard 128 SRAM. It also provides the non-volatility of Flash without any requirement for special WRITE timing or limitations on the number of WRITEs that can be performed ...
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... DQ6 DQ1 14 19 DQ5 DQ2 15 18 DQ4 DQ3 OSCILLATOR AND TIMEKEEPER CLOCK CHAIN REGISTERS POWER 131,064 x 8 SRAM ARRAY VOLTAGE SENSE V PFD AND SWITCHING CIRCUITRY V CC Doc ID 5746 Rev 6 M48T128Y, M48T128V AI02245 A0-A16 DQ0-DQ7 AI01804 ...
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... M48T128Y, M48T128V 2 Operation modes Figure 3 on page 6 oscillator. The clock locations contain the year, month, date, day, hour, minute, and second in 24 hour BCD format. Corrections for 28, 29 (leap year - valid until 2100), 30, and 31 day months are made automatically. Byte 1FFF8h is the clock control register. This byte controls user access to the clock information and also stores the clock calibration setting ...
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... Parameter = ° 4 3.0 to 3.6 V (except where noted Doc ID 5746 Rev 6 M48T128Y, M48T128V (address access time) after the AVQV ). The state of the eight GLQV . If the address inputs AVQV AXQX tAXQX tEHQZ tGHQZ DATA OUT ...
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... M48T128Y, M48T128V 2.2 WRITE mode The M48T128Y the WRITE mode whenever W (WRITE enable) and E (chip enable) are low state after the address inputs are stable. 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 ...
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... PFD . The M48T128Y/V may respond to transient noise spikes the control circuit switches power to the internal battery the battery is disconnected, and the power supply Deselect continues for t CC Doc ID 5746 Rev 6 M48T128Y, M48T128V M48T128Y M48T128V –70 –85 Min Max Min 70 ...
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... M48T128Y, M48T128V 3 Clock operations 3.1 Reading the clock Updates to the TIMEKEEPER prevent reading data in transition. The BiPORT™ TIMEKEEPER cells in the RAM array are only data registers and not the actual clock counters, so updating the registers can be halted without disturbing the clock itself. ...
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... hours Hours 10 minutes Minutes 10 seconds Seconds R S Calibration Figure 7 on page Doc ID 5746 Rev 6 M48T128Y, M48T128V Function/range BCD format D1 D0 Year Year Month Date Date Day Day Hours Minutes Seconds Control 13). The M48T128Y/V design Figure 8 on page ...
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... M48T128Y, M48T128V One method is available for ascertaining how much calibration a given M48T128Y/V may require. This involves setting the clock, letting it run for a month and comparing known accurate reference and recording deviation over a fixed period of time. Calibration values, including the number of seconds lost or gained in a given period, can be found in the STMicroelectronics application note, “ ...
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... These transients can be reduced if CC that drive it to values below (cathode connected 0.1µ Doc ID 5746 Rev 6 M48T128Y, M48T128V bus. The energy stored in the much anode Schottky diode CC SS DEVICE AI02169 ...
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... M48T128Y, M48T128V 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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... Ambient operating temperature (T Load capacitance (C Input rise and fall times Input pulse voltages Input and output timing ref. voltages Note: Output Hi-Z is defined as the point where data is no longer driven. Figure 10. AC testing load circuit for M48T128V. Table 8. Capacitance Symbol C Input capacitance IN (3) ...
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... M48T128Y, M48T128V 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 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 may cause corruption of RAM data. FB (1)(2) Min M48T128Y 4.1 M48T128V 2.7 M48T128Y M48T128V ° 4 3.0 to 3.6 V (except where noted Doc ID 5746 Rev 6 M48T128Y, M48T128V tREC tRB RECOGNIZED VALID AI03612 Min Max Unit 300 µs 10 µs 0 µs 1 µs 40 ...
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... M48T128Y, M48T128V 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 1. PMDIP32 – 32-pin plastic module DIP, package outline Note: Drawing is not to scale ...
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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/nvram, then select "Lithium Battery Recycling" from "Related Topics". 20/23 Doc ID 5746 Rev 6 M48T128Y, M48T128V ...
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... M48T128Y, M48T128V 8 Part numbering Table 13. Ordering information scheme Example: Device type M48T Supply voltage and write protect voltage 128Y = V = 4 (1) 128V = V = 3 Speed – (128Y) – (128V) Package PM = PMDIP32 Temperature range 70°C Shipping method ® ...
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... Reformatted; updated register map 5 IR reflow update (Table Updated Features, Section 6 Section 6; added Section 7: Environmental document. Doc ID 5746 Rev 6 M48T128Y, M48T128V Changes (Table 6) (Table (Table 11) (Table Table 12, 13; added ECOPACK information; reformatted ® ...
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... M48T128Y, M48T128V 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. ...