M48T512Y-70PM1 STMicroelectronics, M48T512Y-70PM1 Datasheet
M48T512Y-70PM1
Specifications of M48T512Y-70PM1
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M48T512Y-70PM1 Summary of contents
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... BCD coded year, month, day, date, hours, minutes, and seconds ■ Automatic power-fail chip deselect and WRITE protection ■ WRITE protect voltages Power-fail deselect voltage) PFD – M48T512Y 4 4.2 V ≤ V ≤ 4.5 V PFD – M48T512V 3 2.7 V ≤ V ≤ ...
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... Setting the clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.3 Stopping and starting the oscillator 3.4 Calibrating the clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 3.5 V noise and negative going transients . . . . . . . . . . . . . . . . . . . . . . . . . Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 6 Environmental information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 8 Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 2/23 Doc ID 5747 Rev 6 M48T512Y, M48T512V ...
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... M48T512Y, M48T512V 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 AC waveforms, chip enable controlled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Figure 7. Crystal accuracy across temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Figure 8. Calibration waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Figure 9. Supply voltage protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Figure 10. AC measurement load circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Figure 11. Power down/up mode AC waveforms Figure 12. Recycling symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Figure 13. PMDIP32 – 32-pin plastic module DIP, package outline . . . . . . . . . . . . . . . . . . . . . . . . . . 20 4/23 Doc ID 5747 Rev 6 M48T512Y, M48T512V ...
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... The special DIP package provides a fully integrated battery-backed memory and real-time clock solution. The M48T512Y/V directly replaces industry standard 512 SRAMs. 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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... DQ0 13 20 DQ1 14 19 DQ2 OSCILLATOR AND CLOCK CHAIN POWER VOLTAGE SENSE V PFD AND SWITCHING CIRCUITRY V CC Doc ID 5747 Rev 6 M48T512Y, M48T512V V CC A15 A17 W A13 A8 A9 A11 G A10 E DQ7 DQ6 DQ5 DQ4 DQ3 TIMEKEEPER REGISTERS A0-A18 DQ0-DQ7 524,280 x 8 SRAM ARRAY ...
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... SO 2.1 READ mode The M48T512Y the READ mode whenever W (WRITE enable) is high and E (chip enable) is low. The unique address specified by the 19 address inputs defines which one of the 524,288 bytes of data accessed. Valid data will be available at the data I/O pins within address access time (t E and G access times are also satisfied ...
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... Valid for ambient operating temperature pF. L 8/23 tAVAV VALID tAVQV tELQV tELQX tGLQV tGLQX DATA OUT M48T512Y (1) –70 Min ° 4 3.0 to 3.6 V (except where noted Doc ID 5747 Rev 6 M48T512Y, M48T512V tAXQX tEHQZ tGHQZ AI02389 M48T512V –85 Max Min Max Unit ns ...
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... M48T512Y, M48T512V 2.2 WRITE mode The M48T512Y 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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... V supply lines is recommended. When V power to the internal battery, preserving data and powering the clock. The internal energy source will maintain data in the M48T512Y/V for an accumulated period of at least 10 years at room temperature. As system power rises above V the power supply is switched to external V ...
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... The STOP bit is located at bit D7 within 7FFF9h. Setting '1' stops the oscillator. The M48T512Y/V is shipped from STMicroelectronics with the STOP bit set to a '1.' When reset to a '0,' the M48T512Y/V oscillator starts after approximately one second. Note not necessary to set the WRITE bit when setting or resetting the FREQUENCY TEST bit (FT) or the STOP bit (ST). ® ...
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... Calibrating the clock The M48T512Y/V is driven by a quartz controlled oscillator with a nominal frequency of 32,768 Hz. The devices are factory calibrated at 25 °C and tested for accuracy. Clock accuracy will not exceed 35 ppm (parts per million) oscillator frequency error at 25 °C, which equates to about ± ...
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... M48T512Y, M48T512V One method for ascertaining how much calibration a given M48T512Y/V may require 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 STMicroelectronics’ ...
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... Negative undershoots below –0.3 V are not allowed on any pin while in the battery backup mode. 14/23 bus. A ceramic bypass capacitor value of 0.1 µF CC that drive it to values below V CC (cathode connected 0.1µF Doc ID 5747 Rev 6 M48T512Y, M48T512V by as much anode (Schottky diode 1N5817 DEVICE V SS AI02169 ...
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... M48T512Y, M48T512V 4 Maximum ratings Stressing the device above the ratings 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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... Figure 10. AC measurement load circuit for M48T512V. L Table 8. Capacitance Symbol C Input capacitance IN (3) C Input / output capacitance IO 1. Effective capacitance measured with power supply (M48T512Y) or 3.3 V (M48T512V). Sampled only, not 100% tested ° MHz. 3. Outputs deselected. 16/23 M48T512Y ) 4 100 L ≤ ...
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... M48T512Y, M48T512V 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) M48T512Y M48T512V M48T512Y M48T512V = ° 4 3.0 to 3.6 V (except where noted Doc ID 5747 Rev 6 M48T512Y, M48T512V Min Max 300 10 150 200 Min Typ Max 4.2 4 ...
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... M48T512Y, M48T512V 6 Environmental information Figure 12. 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/nvram, then select " ...
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... Doc ID 5747 Rev 6 M48T512Y, M48T512V inches Typ Min 0.365 0.015 0.017 0.008 1.670 0.710 0.100 0.090 1.500 0.600 0.590 0.120 0.075 32 ® ...
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... M48T512Y, M48T512V 8 Part numbering Table 13. Ordering information scheme Example: Device type M48T Supply voltage and write protect voltage 512Y = V = 4 (1) 512V = V = 3 Speed – (512Y) – (512V) Package PM = PMDIP32 Temperature range °C Shipping method Blank = ECOPACK 1. Contact the local ST sales office for availability. ...
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... Reformatted document, minor text changes; updated cover page and 5 Table 13 concerning availability of M48T512V (3.3 V version); updated Figure 9, 10, 11, Table 9, 12, Updated Features, Section 6 Section 6: Environmental Doc ID 5747 Rev 6 M48T512Y, M48T512V Changes (Figure 11, Table 10) (Table (Table (Table 6) Section 7: Package mechanical 4, Table 12, 13; text in Section 7 ...
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... M48T512Y, M48T512V 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. ...