M48T18-150PC STMicroelectronics, M48T18-150PC Datasheet
M48T18-150PC
Specifications of M48T18-150PC
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M48T18-150PC Summary of contents
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... WHICH CONTAINS THE BATTERY AND CRYSTAL PIN AND FUNCTION COMPATIBLE WITH DS1643 and JEDEC STANDARD 8K x8 SRAMs April 2004 5V, 64 Kbit (8 Kb x8) TIMEKEEPER Figure 1. 28-pin PCDIP, CAPHAT™ Package Figure 2. 28-pin SOIC Package M48T08 M48T08Y, M48T18 ® SRAM 28 1 PCDIP28 (PC) Battery/Crystal CAPHAT SNAPHAT (SH) Battery/Crystal ...
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... M48T08, M48T08Y, M48T18 TABLE OF CONTENTS FEATURES SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Figure 1. 28-pin PCDIP, CAPHAT™ Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Figure 2. 28-pin SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 SUMMARY DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Figure 3. Logic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Table 1. Signal Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Figure 4. DIP Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Figure 5. SOIC Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Figure 6. Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 OPERATION MODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Table 2. Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 READ Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Figure 7 ...
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... Figure 18.SH – 4-pin SNAPHAT Housing for 120mAh Battery & Crystal, Package Outline . . . . . . 24 Table 15. SH – 4-pin SNAPHAT Housing for 120mAh Battery & Crystal, Package Mech. Data PART NUMBERING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Table 16. Ordering Information Scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Table 17. SNAPHAT Battery Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 REVISION HISTORY Table 18. Document Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 M48T08, M48T08Y, M48T18 3/27 ...
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... M48T08, M48T08Y, M48T18 SUMMARY DESCRIPTION The M48T08/18/08Y TIMEKEEPER non-volatile static RAM and real time clock which is pin and functional compatible with the DS1643. The monolithic chip is available in two special packages to provide a highly integrated battery backed-up memory and real time clock so- lution ...
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... Figure 6. Block Diagram OSCILLATOR AND 32,768 Hz CRYSTAL LITHIUM CELL VOLTAGE SENSE V CC Figure 5. SOIC Connections A11 A10 DQ7 18 DQ6 17 DQ5 16 DQ4 15 DQ3 CLOCK CHAIN POWER V PFD AND SWITCHING CIRCUITRY INT M48T08, M48T08Y, M48T18 INT A12 A11 M48T08Y A10 DQ7 DQ0 11 18 ...
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... M48T08, M48T08Y, M48T18 OPERATION MODES As Figure 6., page 5 shows, the static memory ar- ray and the quartz-controlled clock oscillator of the M48T08/18/08Y 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 ...
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... Hold time (t AXQX next address access. tAVAV VALID tAVQV tE1LQV tE1LQX tE2HQV tE2HQX tGLQV tGLQX VALID M48T08, M48T08Y, M48T18 Output Enable Access E2HQV , the data lines will be driven to AVQV . If the address AVQV ) but will go indeterminate until the tAXQX tE1HQZ tE2LQZ tGHQZ ...
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... M48T08, M48T08Y, M48T18 Table 3. READ Mode AC Characteristics Symbol t READ Cycle Time AVAV t Address Valid to Output Valid AVQV t Chip Enable 1 Low to Output Valid E1LQV t Chip Enable 2 High to Output Valid E2HQV t Output Enable Low to Output Valid GLQV t Chip Enable 1 Low to Output Transition E1LQX ...
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... E1 and G and a high on E2, a low on W will disable the outputs t E1HAX WLQZ from WRITE WHAX tAVAV VALID tAVWH tAVE1L tAVE2H tWLWH tAVWL tWLQZ tDVWH M48T08, M48T08Y, M48T18 after W falls. tWHAX tWHQX tWHDX DATA INPUT AI00963 prior to DVWH af- WHDX 9/27 ...
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... M48T08, M48T08Y, M48T18 Figure 9. Chip Enable Controlled, WRITE AC Waveforms A0-A12 tAVE1L E1 tAVE2H E2 W DQ0-DQ7 10/27 tAVAV VALID tAVE1H tE1LE1H tAVE2L tE2HE2L tAVWL DATA INPUT tDVE1H tDVE2L tE1HAX tE2LAX tE1HDX tE2LDX AI00964B ...
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... Address Valid to Chip Enable 2 Low AVE2L t WRITE Enable High to Output Transition WHQX Note: 1. Valid for Ambient Operating Temperature: T (1) Parameter = 0 to 70° 4.75 to 5.5V or 4.5 to 5.5V (except where noted M48T08, M48T08Y, M48T18 M48T08/M48T18/T08Y –100/–10 (T08Y) –150/–15 (T08Y) Min Max Min Max 100 150 0 0 ...
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... M48T08, M48T08Y, M48T18 Data Retention Mode With valid V applied, the M48T08/18/08Y oper- CC ates as a conventional BYTEWIDE™ static RAM. Should the supply voltage decay, the RAM will au- tomatically power-fail deselect, write protecting it- self when V falls within the V CC (min) window. All outputs become high imped- ance, and all inputs are treated as “ ...
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... See the Application Note AN923, “TIMEKEEPER Rolling Into the 21 Century Rollover. Data Year 10 M Month 10 Date Date Hours Hours Minutes Seconds Calibration M48T08, M48T08Y, M48T18 5 must be written to '0' st Century” for information on Function/Range BCD Format D1 D0 Year Month Date Day Day Hours Minutes Seconds Control ® ...
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... M48T08, M48T08Y, M48T18 Stopping and Starting the Oscillator The oscillator may be stopped at any time. If the device is going to spend a significant amount of time on the shelf, the oscillator can be turned off to minimize current drain on the battery. The STOP Bit (ST) is the MSB of the seconds register. Setting '1' stops the oscillator ...
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... Figure 10. Crystal Accuracy Across Temperature ppm 20 0 -20 -40 -60 -80 -100 0 5 Figure 11. Clock Calibration NORMAL POSITIVE CALIBRATION NEGATIVE CALIBRATION F = -0.038 ppm 10 M48T08, M48T08Y, M48T18 AI02124 AI00594B 15/27 ...
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... M48T08, M48T08Y, M48T18 V Noise And Negative Going Transients CC I transients, including those produced by output CC switching, can produce voltage fluctuations, re- sulting in spikes on the V bus. These transients CC can be reduced if capacitors are used to store en- ergy which stabilizes the V CC stored in the bypass capacitors will be released as low going spikes are generated or energy will be absorbed when overshoots occur ...
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... CAUTION: Do NOT wave solder SOIC to avoid damaging SNAPHAT sockets. not implied. Exposure to Absolute Maximum Rat- ing conditions for extended periods may affect de- vice reliability. STMicroelectronics SURE Program and other rel- evant quality documents. Parameter Off, Oscillator Off) CC M48T08, M48T08Y, M48T18 Refer also to the Value Unit °C – ° ...
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... M48T08, M48T08Y, M48T18 DC AND AC PARAMETERS This section summarizes the operating and mea- surement conditions, as well as the DC and AC characteristics of the device. The parameters in the following DC and AC Characteristic tables are derived from tests performed under the Measure- Table 7. Operating and AC Measurement Conditions Parameter ...
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... Negative spikes of –1V allowed for up to 10ns once per Cycle. 5. The INT pin is Open Drain. (1) Test Condition OUT CC Outputs open IH – 0.2V 0. 2.1mA OL ( 0.5mA –1mA 70° 4.75 to 5.5V or 4.5 to 5.5V (except where noted M48T08, M48T08Y, M48T18 M48T08/M48T18/T08Y Unit Min Max ±1 µA ±1 µ –0.3 0 0.3 2 0.4 V 0.4 V 2.4 V 19/27 ...
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... M48T08, M48T08Y, M48T18 Figure 14. Power Down/Up Mode AC Waveforms PFD (max) V PFD (min tPD INT INPUTS RECOGNIZED OUTPUTS VALID (PER CONTROL INPUT) Note: Inputs may or may not be recognized at this time. Caution should be taken to keep E1 high or E2 low as V Some systems may perform inadvertent WRITE cycles after V Even though a power on reset is being applied to the processor, a reset condition may not occur until after the system clock is running ...
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... M48T08, M48T08Y, M48T18 C eA PCDIP inches Typ Min Max 0.350 0.380 0.015 0.030 0.330 0.350 0.015 0.021 0.045 0.070 0.008 0.012 1.550 1 ...
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... M48T08, M48T08Y, M48T18 Figure 16. SOH28 – 28-lead Plastic Small Outline, 4-socket battery SNAPHAT, Package Outline SOH-A Note: Drawing is not to scale. Table 13. SOH28 – 28-lead Plastic SO, 4-socket battery SNAPHAT, Package Mech. Data Symb Typ 1. 22/ Min Max 3.05 0.05 0.36 2.34 2.69 ...
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... E 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 15.55 15.95 3.20 3.61 2.03 2.29 M48T08, M48T08Y, M48T18 SHTK-A inches Typ Min Max 0.385 0.265 0.285 0.255 0.275 0.015 0.018 0.022 0.835 0.860 0.560 0.590 ...
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... M48T08, M48T08Y, M48T18 Figure 18. SH – 4-pin SNAPHAT Housing for 120mAh Battery & Crystal, Package Outline Note: Drawing is not to scale. Table 15. SH – 4-pin SNAPHAT Housing for 120mAh Battery & Crystal, Package Mech. Data Symb Typ 24/ Min Max 10.54 8.00 8.51 7 ...
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... Table 17. SNAPHAT Battery Table Part Number M4T28-BR12SH Lithium Battery (48mAh) SNAPHAT M4T32-BR12SH Lithium Battery (120mAh) SNAPHAT M48T = 4.2 to 4.5V ® ), Tubes ® ), Tape & Reel ® battery/crystal package which is ordered separately under the part number Description M48T08, M48T08Y, M48T18 18 –100 PC 1 Package 25/27 ...
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... M48T08, M48T08Y, M48T18 REVISION HISTORY Table 18. Document Revision History Date Rev. # December 1999 1.0 First Issue From Preliminary Data to Data Sheet; Battery Low Flag paragraph changed; 100ns 07-Feb-00 2.0 speed class identifier changed (Tables 3, 4) 11-Jul-00 2 Reformatted; SNAPHAT battery table added (Table 17); added temp./voltage info. to 16-Jul-01 3 ...
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