M48T129V-85PM1 STMicroelectronics, M48T129V-85PM1 Datasheet
M48T129V-85PM1
Specifications of M48T129V-85PM1
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M48T129V-85PM1 Summary of contents
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... Two WRITE protect voltages power-fail deselect voltage) PFD – M48T129Y 4 4.2 V ≤ V ≤ 4.5 V PFD – M48T129V 3 2.7 V ≤ V ≤ 3.0 V PFD ■ Conventional SRAM operation; unlimited WRITE cycles ■ Software controlled clock calibration for high accuracy applications ■ ...
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... Power-on reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 3.9 Battery low warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 3.10 Initial power-on defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 3.11 V noise and negative going transients . . . . . . . . . . . . . . . . . . . . . . . . . Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 7 Environmental information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 8 Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 2/28 ® registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Doc ID 5710 Rev 4 M48T129V, M48T129Y ...
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... M48T129V, M48T129Y List of tables Table 1. Signal names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Table 2. Operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Table 3. READ mode AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Table 4. WRITE mode AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 ® Table 5. TIMEKEEPER register map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Table 6. Alarm repeat mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Table 7. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Table 8. Operating and AC measurement conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Table 9. Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Table 10. DC characteristics Table 11 ...
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... Alarm interrupt reset waveform Figure 11. Backup mode alarm waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Figure 12. Supply voltage protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Figure 13. AC testing load circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Figure 14. Power down/up mode AC waveforms Figure 15. PMDIP32 – 32-pin plastic DIP module, package outline . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Figure 16. Recycling symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 4/28 Doc ID 5710 Rev 4 M48T129V, M48T129Y ...
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... M48T129V, M48T129Y 1 Description The M48T129Y/V TIMEKEEPER time clock with programmable alarms and a watchdog timer. The special DIP package provides a fully integrated battery-backed memory and real-time clock solution. The M48T129Y/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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... DQ7 DQ0 13 20 DQ6 DQ1 14 19 DQ5 DQ2 15 18 DQ4 DQ3 OSCILLATOR AND TIMEKEEPER CLOCK CHAIN REGISTERS POWER 131,056 x 8 SRAM ARRAY VOLTAGE SENSE V PFD AND SWITCHING CIRCUITRY V CC Doc ID 5710 Rev 4 M48T129V, M48T129Y AI02261 RST IRQ/FT A0-A16 DQ0-DQ7 AI02583 ...
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... M48T129V, M48T129Y 2 Operating modes Figure 3 on page 6 oscillator. The clock locations contain the century, 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. The nine clock bytes (1FFFFh-1FFF9h and 1FFF1h) are not the actual clock counters, they are memory locations consisting of BiPORT™ ...
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... DATA VALID 8/ the data lines will be driven to an indeterminate state until t AVQV tAVAV VALID tAVQV tELQV tELQX tGLQV tGLQX tAVAV VALID tAVQV tAXQX Doc ID 5710 Rev 4 M48T129V, M48T129Y ) or output enable ELQV tAXQX tEHQZ tGHQZ DATA OUT DATA VALID . If AVQV AI01197 AI02324 ...
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... M48T129V, M48T129Y Table 3. READ mode AC characteristics Symbol t READ cycle time AVAV t Address valid to output valid AVQV t Chip enable low to output valid ELQV t Output enable low to output valid GLQV (2) t Chip enable low to output transition ELQX Output enable low to output (2) t GLQX ...
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... WRITE and remain valid for t tAVAV VALID tAVWH tAVEL tWLWH tAVWL tWLQZ tDVWH tAVAV VALID tELEH tAVWL DATA INPUT tDVWH Doc ID 5710 Rev 4 M48T129V, M48T129Y from chip enable or EHAX afterward. G WHDX WLQZ tWHAX tWHQX tWHDX DATA INPUT tEHAX tWHDX after W AI02382 AI02582 ...
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... M48T129V, M48T129Y Table 4. WRITE mode AC characteristics Symbol 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 WHAX ...
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... BCD. ® registers should be halted before clock data is read to ® ® counters and allows normal operation to Doc ID 5710 Rev 4 M48T129V, M48T129Y ® , alarm, ® registers are updated registers. The user can then load them Table 5 on page ...
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... M48T129V, M48T129Y Table 5. TIMEKEEPER Address D7 1FFFFh 1FFFEh 0 1FFFDh 0 1FFFCh 0 1FFFBh 0 1FFFAh 0 1FFF9h ST 1FFF8h W 1FFF7h WDS 1FFF6h AFE 1FFF5h RPT4 1FFF4h RPT3 1FFF3h RPT2 1FFF2h RPT1 1FFF1h 1FFF0h WDF Keys SIGN bit FT = FREQUENCY TEST bit R = READ bit W = WRITE bit ST = STOP bit 0 = Must be set to ' '1' or '0‘ ...
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... The IRQ/FT pin is an open drain output which requires a pull-up resistor for proper operation. A 500-10 kΩ resistor is recommended in order to control the rise time. The FT bit is cleared on power-up. 14/28 Figure 8 on page ® illustrates a TIMEKEEPER calibration waveform. Doc ID 5710 Rev 4 M48T129V, M48T129Y 15). When the calibration Figure 9 on page 15. ...
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... M48T129V, M48T129Y Figure 8. Crystal accuracy across temperature Frequency (ppm –20 –40 –60 –80 –100 –120 –140 –160 –40 –30 Figure 9. Calibration waveform NORMAL POSITIVE CALIBRATION NEGATIVE CALIBRATION ΔF = -0.038 F T –20 – Temperature °C Doc ID 5710 Rev 4 Clock operations ppm 2 ± 10% ...
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... Min ADDRESS 1FF0h RPT4 RPT3 RPT2 Doc ID 5710 Rev 4 M48T129V, M48T129Y Table 6 on page 16 HIGH-Z RPT1 Alarm activated 1 1 Once per second 1 0 Once per minute 0 0 Once per hour 0 0 Once per day 0 0 ...
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... M48T129V, M48T129Y Figure 11. Backup mode alarm waveforms PFD (max) V PFD (min AFE bit in Interrupt Register AF bit in Flags Register IRQ/FT 3.7 Watchdog timer The watchdog timer can be used to detect an out-of-control microprocessor. The user programs the watchdog timer by setting the desired amount of time-out into the watchdog register, address 1FFF7h ...
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... Initial power-on defaults Upon application of power to the device, the following register bits are set to a '0' state: WDS, BMB0-BMB4, RB0,RB1, AFE, ABE and FT. 18/28 . When V falls to the power fail detect trip CC CC Doc ID 5710 Rev 4 M48T129V, M48T129Y after V REC CC is applied to the device. CC ...
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... M48T129V, M48T129Y 3.11 V noise and negative going transients CC I transients, including those produced by output switching, can produce voltage CC fluctuations, resulting in spikes on the V capacitors are used to store energy which stabilizes the V bypass capacitors will be released as low going spikes are generated or energy will be absorbed when overshoots occur. A ceramic bypass capacitor value of 0.1 µ ...
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... For DIP packaged devices, ultrasonic vibrations should not be used for post-solder cleaning to avoid damaging the crystal. Caution: Negative undershoots below –0.3 V are not allowed on any pin while in the battery backup mode. 20/28 Parameter off, oscillator off) CC M48T129Y M48T129V Doc ID 5710 Rev 4 M48T129V, M48T129Y Value Unit °C – °C 260 °C –0 +0 – ...
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... Figure 13. AC testing load circuit Note: Excluding open drain output pins for M48T129V. Table 9. Capacitance Symbol C Input capacitance IN (3) C Input / output capacitance IO 1. Effective capacitance measured with power supply (M48T129Y) or 3.3 V (M48T129V); sampled only, not 100% tested ° MHz. 3. Outputs deselected. M48T129Y ) 4 ...
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... V ≤ V ≤ ≤ V ≤ V OUT CC Outputs open – 0 –0 – ° 4 3.0 to 3.6 V (except where noted Doc ID 5710 Rev 4 M48T129V, M48T129Y M48T129V –70 –85 Max Min Max ±2 ±2 ±2 ± 0.8 –0.3 0 0 0.4 ...
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... M48T129V, M48T129Y Figure 14. Power down/up mode AC waveforms PFD (max) V PFD (min INPUTS RECOGNIZED OUTPUTS VALID RST Table 11. Power down/up AC characteristics Symbol ( (max PFD PFD ( (min PFD (min PFD PFD (min PFD t V (max) to RST high REC PFD 1. Valid for ambient operating temperature ...
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... Doc ID 5710 Rev 4 M48T129V, M48T129Y C eA PMDIP 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 ...
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... M48T129V, M48T129Y 7 Environmental information Figure 16. 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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... Supply voltage and write protect voltage 129Y = V = 4 129V = V = 3 Speed – (for M48T129Y) – (for M48T129V) Package PM = PMDIP32 Temperature range °C Shipping method Blank = ECOPACK For other options, or for more information on any aspect of this device, please contact the ST sales office nearest you. ...
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... M48T129V, M48T129Y 9 Revision history Table 15. Document revision history Date Revision Apr-2000 22-Jun-2001 01-Aug-2001 06-Aug-2001 13-Aug-2001 07-Nov-2001 26-Mar-2002 20-May-2002 18-Nov-2002 24-Oct-2003 22-Feb-2005 09-Jun-2010 1 Chipset data sheet - First Issue Reformatted; added temperature information 2 <Blue>12) 2.1 Added value to AC Testing Load Circuit 2.2 Fix text and table for “Setting the Alarm Clock” ...
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... Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America 28/28 Please Read Carefully: © 2010 STMicroelectronics - All rights reserved STMicroelectronics group of companies www.st.com Doc ID 5710 Rev 4 M48T129V, M48T129Y ...