M48T512V ST Microelectronics, M48T512V Datasheet
M48T512V
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M48T512V Summary of contents
Page 1
... AUTOMATIC POWER-FAIL CHIP DESELECT and WRITE PROTECTION WRITE PROTECT VOLTAGES Power-fail Deselect Voltage) PFD – M48T512Y: 4.2V V PFD – M48T512V: 2.7V V PFD CONVENTIONAL SRAM OPERATION; UNLIMITED WRITE CYCLES SOFTWARE CONTROLLED CLOCK CALIBRATION FOR HIGH ACCURACY APPLICATIONS 10 YEARS of DATA RETENTION and CLOCK OPERATION in the ABSENCE OF POWER ...
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... M48T512Y, M48T512V Table 2. Absolute Maximum Ratings Symbol T Ambient Operating Temperature A T Storage Temperature (V STG (2) Lead Solder Temperature for 10 seconds T SLD V Input or Output Voltages IO V Supply Voltage CC I Output Current O P Power Dissipation D Note: 1. Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied ...
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... Note that Output Hi-Z is defined as the point where data is no longer driven. , the AVQV Figure 3. AC Testing Load Circuit ) but AXQX DEVICE UNDER TEST from Chip Enable C L includes JIG capacitance af- WLQZ M48T512Y, M48T512V W DQ0-DQ7 Power X High Z Standby V D Active Active ...
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... M48T512Y, M48T512V Figure 4. Block Diagram OSCILLATOR AND 32,768 Hz CRYSTAL LITHIUM CELL VOLTAGE SENSE DATA RETENTION MODE With valid V applied, the M48T512Y/V operates conventional BYTEWIDE™ static RAM. Should the supply voltage decay, the RAM will au- tomatically deselect, write protecting itself when ...
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... MHz) A Symbol Parameter C Input Capacitance IN (2) Input / Output Capacitance C IO Note: 1. Effective capacitance measured with power supply at 5V (M48T512Y) or 3.3V (M48T512V). Sampled only, not 100% tested. 2. Outputs deselected. Table 6A. DC Characteristics ( ° 4.5V to 5.5V Symbol Parameter (1) Input Leakage Current ...
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... M48T512Y, M48T512V Figure 5. Power Down/Up Mode AC Waveforms PFD (max) V PFD (min tWP INPUTS RECOGNIZED (Including E) OUTPUTS VALID Table 7. Power Down/Up Trip Points DC Characteristics ( °C) A Symbol V Power-fail Deselect Voltage PFD V Battery Back-up Switchover Voltage SO (2) Expected Data Retention Time ...
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... 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). M48T512Y, M48T512V M48T512V -85 Max Min Max ...
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... M48T512Y, M48T512V Table 10. Write Mode AC Characteristics ( °C) A Symbol Parameter t Write Cycle Time AVAV t Address Valid to Write Enable Low AVWL t Address Valid to Chip Enable Low AVEL t Write Enable Pulse Width WLWH t Chip Enable Low to Chip Enable High ELEH t Write Enable High to Address Transition ...
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... A0-A18 E G DQ0-DQ7 Figure 8. Write Enable Controlled, Write AC Waveforms A0-A18 E W DQ0-DQ7 tAVAV VALID tAVQV tELQV tELQX tGLQV tGLQX tAVAV VALID tAVWH tAVEL tWLWH tAVWL tWLQZ tDVWH M48T512Y, M48T512V tAXQX tEHQZ tGHQZ DATA OUT AI02389 tWHAX tWHQX tWHDX DATA INPUT AI02386 9/14 ...
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... M48T512Y, M48T512V Figure 9. Chip Enable Controlled, Write AC Waveforms A0-A18 E W DQ0-DQ7 Assuming that the oscillator is running at exactly 32,768Hz, each of the 31 increments in the Cali- bration byte would represent +10.7 or –5.35 sec- onds per month which corresponds to a total range of +5.5 or –2.75 minutes per month. Figure 10 il- lustrates a TIMEKEEPER calibration waveform ...
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... Must be set to zero Figure 10. Calibration Waveform NORMAL POSITIVE CALIBRATION NEGATIVE CALIBRATION Data Year Month 10 Date Date Hours Hours Minutes Seconds Calibration M48T512Y, M48T512V Function/Range BCD Format D1 D0 Year Month Date Day Day Hour Minutes Seconds Control 00-99 01-12 01-31 01-07 00-23 00-59 00-59 AI00594B 11/14 ...
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... M48T512Y, M48T512V Table 12. Ordering Information Scheme Example: Device Type M48T Supply Voltage and Write Protect Voltage 512Y = V = 4.5V to 5.5V 4.2V to 4.5V CC PFD 512V = V = 3.0V to 3.6V 2.7V to 3.0V CC PFD Speed -70 = 70ns - Package PM = PMDIP32 Temperature Range °C For a list of available options (Speed, Package, etc...) or for further information on any aspect of this de- vice, please contact the ST Sales Office nearest to you ...
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... N 1 Drawing is not to scale. mm Min Max 9.27 9.52 0.38 – 0.43 0.59 0.20 0.33 42.42 43.18 18.03 18.80 2.29 2.79 34.29 41.91 14.99 16.00 3.05 3.81 1.91 2. M48T512Y, M48T512V inches Typ Min Max 0.365 0.375 0.015 0.017 0.023 0.008 0.013 1.670 1.700 0.710 0.740 0.090 0.110 1.350 1.650 0.590 0.630 0.120 0.150 0.075 0.110 PMDIP – 13/14 ...
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... M48T512Y, M48T512V Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice ...