M48T35-70MH1 STMICROELECTRONICS [STMicroelectronics], M48T35-70MH1 Datasheet
M48T35-70MH1
Related parts for M48T35-70MH1
M48T35-70MH1 Summary of contents
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... HOURS, MINUTES and SECONDS FREQUENCY TEST OUTPUT for REAL TIME CLOCK AUTOMATIC POWER-FAIL CHIP DESELECT and WRITE PROTECTION WRITE PROTECT VOLTAGES (V = Power-fail Deselect Voltage): PFD – M48T35: 4.5V V 4.75V PFD – M48T35Y: 4.2V V PFD SELF-CONTAINED BATTERY and CRYSTAL in the CAPHAT DIP PACKAGE SOIC PACKAGE PROVIDES DIRECT ...
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... The 28 pin 600mil DIP CAPHAT houses the M48T35/35Y silicon with a quartz crystal and a long life lithium button cell in a single package. The 28 pin 330mil SOIC provides sockets with gold plated contacts at both ends for direct con- ...
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... BR12SH1". As Figure 3 shows, the static memory array and the quartz controlled clock oscillator of the M48T35/35Y 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 ad- dresses 7FF8h-7FFFh ...
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... CC CC nate until the next Address Access. WRITE MODE The M48T35/35Y is in the Write Mode whenever W and E are low. 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 V OUT = 4.75V to 5.5V or 4.5V to 5.5V) CC Test Condition OUT Outputs open – 0. 2.1mA –1mA OH Parameter M48T35 M48T35Y Grade 1 Grade 6 . M48T35, M48T35Y Min Max = Min Max V ± ± –0.3 0 0.3 2.2 CC 0.4 2.4 (1) Min Typ Max 4 ...
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... M48T35, M48T35Y Table 8. Power Down/Up AC Characteristics ( °C or – °C) A Symbol before Power Down PD IH (1) V (max PFD PFD F (2) V (min PFD (min PFD PFD (min PFD ...
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... C = 5pF. L Figure 6. Read Mode AC Waveforms A0-A14 E G DQ0-DQ7 Note: Write Enable (W) = High. = 4.75V to 5.5V or 4.5V to 5.5V) CC Parameter . tAVAV VALID tAVQV tELQV tELQX tGLQV tGLQX M48T35, M48T35Y M48T35 / M48T35Y -70 Min Max tAXQX tEHQZ tGHQZ VALID AI00925 Unit ns ns ...
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... CC Parameter When V switches power to the internal battery which pre- serves data and powers the clock. The internal button cell will maintain data in the M48T35/35Y for an accumulated period of at least 7 years when V is less than V (max), V (min) CC PFD ...
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... Figure 7. Write Enable Controlled, Write AC Waveform A0-A14 E W DQ0-DQ7 Figure 8. Chip Enable Controlled, Write AC Waveforms A0-A14 E W DQ0-DQ7 tAVAV VALID tAVWH tAVEL tWLWH tAVWL tWLQZ tAVAV VALID tAVEH tAVEL tELEH tAVWL tDVEH M48T35, M48T35Y tWHAX tWHQX tWHDX DATA INPUT tDVWH AI00926 tEHAX tEHDX DATA INPUT AI00927 9/18 ...
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... MSB of the seconds register. Setting ’1’ stops the oscillator. The M48T35/35Y is shipped from STMicroelectronics with the STOP bit set to a ’1’. When reset to a ’0’, the M48T35/35Y oscillator starts within 1 second. Calibrating the Clock The M48T35/35Y is driven by a quartz controlled oscillator with a nominal frequency of 32,768 Hz ...
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... M48T35, M48T35Y Two methods are available for ascertaining how much calibration a given M48T35/35Y may re- quire. 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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... M48T35, M48T35Y Figure 10. Crystal Accuracy Across Temperature Frequency (ppm –20 –40 –60 –80 –100 –120 –140 –160 –40 –30 –20 POWER SUPPLY DECOUPLING and UNDERSHOOT PROTECTION I transients, including those produced by output CC switching, can produce voltage fluctuations, re- sulting in spikes on the V bus. These transients ...
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... Shipping Method for SOIC blank = Tubes TR = Tape & Reel Note: 1. The M48T35 part is offered with the PCDIP28 (i.e. CAPHAT) package only. 2. The SOIC package (SOH28) requires the battery package (SNAPHAT) which is ordered separately under the part number "M4TXX-BR12SH1" in plastic tube or "M4TXX-BR12SH1TR" in Tape & Reel form. ...
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... M48T35, M48T35Y Table 14. PCDIP28 - 28 pin Plastic DIP, battery CAPHAT, Package Mechanical Data Symb Typ Figure 12. PCDIP28 - 28 pin Plastic DIP, battery CAPHAT, Package Outline Drawing is not to scale. 14/18 mm Min Max 8.89 9.65 0.38 0.76 8.38 8.89 0.38 0.53 1.14 1.78 0.20 0.31 39.37 39.88 17.83 18.34 2.29 2.79 29.72 36.32 15.24 16.00 3.05 3. inches ...
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... Min Max 3.05 0.05 0.36 2.34 2.69 0.36 0.51 0.15 0.32 17.71 18.49 8.23 8.89 – – 3.20 3.61 11.51 12.70 0.41 1.27 0° 8° M48T35, M48T35Y inches Typ Min 0.002 0.092 0.014 0.006 0.697 0.324 0.050 – 0.126 0.453 0.016 0° Max 0.120 0.014 0.106 0.020 0.012 0.728 0.350 – 0.142 0.500 0.050 8° ...
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... M48T35, M48T35Y Table 16. M4T28-BR12SH SNAPHAT Housing for 48 mAh Battery & Crystal, Package Mechanical Data Symb Typ Figure 14. M4T28-BR12SH SNAPHAT Housing for 48 mAh Battery & Crystal, Package Outline Drawing is not to scale. 16/18 mm Min Max 9.78 6.73 7.24 6.48 6.99 0.38 0.46 0.56 21.21 21.84 14.22 14.99 3.20 3.61 2.03 2. inches Typ Min Max 0 ...
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... Figure 15. M4T28-BR12SH SNAPHAT Housing for 120 mAh Battery & Crystal, Package Outline Drawing is not to scale. mm 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. M48T35, M48T35Y 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 0.710 0.126 0.142 0.080 0.090 SHTK ...
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... M48T35, M48T35Y 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 ...