m48t129v STMicroelectronics, m48t129v Datasheet
m48t129v
Available stocks
Related parts for m48t129v
m48t129v Summary of contents
Page 1
... DESELECT AND WRITE PROTECTION TWO WRITE PROTECT VOLTAGES Power-fail Deselect Voltage) PFD – M48T129Y 4.5 to 5.5V CC 4.2V V 4.5V PFD – M48T129V 3.0 to 3.6V CC 2.7V V 3.0V 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 ...
Page 2
... M48T129Y, M48T129V TABLE OF CONTENTS FEATURES SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Figure 1. 32-pin Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Figure 2. Logic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Table 1. Signal Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Figure 3. 32-pin Module Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Figure 4. Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Figure 5. Hardware Hookup for Equivalent Surface-mount (SMT) Solution . . . . . . . . . . . . . . . . . . . 6 OPERATING MODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Table 2. Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 READ Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 6. Chip Enable or Output Enable Controlled, READ Mode AC Waveforms . . . . . . . . . . . . . 8 Figure 7 ...
Page 3
... Figure 20.SH – 4-pin SNAPHAT Housing for 120mAh Battery & Crystal, Package Outline . . . . . . 27 Table 16. SH – 4-pin SNAPHAT Housing for 120mAh Battery & Crystal, Package Mech. Data PART NUMBERING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Table 17. Ordering Information Scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Table 18. SNAPHAT Battery Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 REVISION HISTORY Table 19. Revision History M48T129Y, M48T129V 3/30 ...
Page 4
... M48T129Y, M48T129V DESCRIPTION The M48T129Y/V TIMEKEEPER 128 non-volatile static RAM and real-time clock with programmable alarms and a watchdog timer. The special DIP package provides a fully in- tegrated battery back-up memory and real-time clock solution. The M48T129Y/V directly replaces industry standard 128 SRAM. It also pro- ...
Page 5
... DQ0 13 20 DQ1 14 19 DQ2 AI02261 POWER V PFD AND SWITCHING CIRCUITRY V CC M48T129Y, M48T129V V CC A15 IRQ/FT W A13 A8 A9 A11 G A10 E DQ7 DQ6 DQ5 DQ4 DQ3 TIMEKEEPER REGISTERS RST IRQ/FT A0-A16 131,056 x 8 SRAM ARRAY ...
Page 6
... The chip enable access time of the external SRAM will be the combination of the chip enable access for the SRAM itself, plus the chip enable propagation delay t for the M48T201Y/V. EPD 1. For 5V, M48T129Y (M48T201Y + 5V 1Mb LPSRAM). For 3.3V, M48T129V (M48T201V + 3V 1Mb LPSRAM). 2. SNAPHAT Top ordered separately. 6/30 A0-A16 V OUT 0 ...
Page 7
... ( M48T129Y, M48T129V ® register data and external CC W DQ0-DQ7 Power X High Z Standby V D Active Active IH OUT V High Z Active IH ...
Page 8
... M48T129Y, M48T129V READ Mode The M48T129Y the READ Mode whenever W (WRITE Enable) is high and E (Chip Enable) is low. The unique address specified by the 17 Ad- dress Inputs defines which one of the 131,072 bytes of data accessed. Valid data will be available at the Data I/O pins within t ...
Page 9
... GHQZ t Address Transition to Output Transition AXQX Note: 1. Valid for Ambient Operating Temperature 5pF. L M48T129Y (1) –70 Min 70° 4.5 to 5.5V or 3.0 to 3.6V (except where noted M48T129Y, M48T129V M48T129V –85 Max Min Max Unit ...
Page 10
... M48T129Y, M48T129V WRITE Mode The M48T129Y 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 termi- nated by the earlier rising edge The ad- dresses must be held valid throughout the cycle ...
Page 11
... If E goes low simultaneously with W going low, the outputs remain in the high impedance state. M48T129Y (1) –70 Min 70° 4.5 to 5.5V or 3.0 to 3.6V (except where noted M48T129Y, M48T129V M48T129V –85 Max Min Max Unit ...
Page 12
... M48T129Y, M48T129V Data Retention Mode With valid V applied, the M48T129Y/V operates conventional BYTEWIDE™ static RAM. Should the supply voltage decay, the RAM will au- tomatically deselect, write protecting itself when V falls between V (max PFD dow. All outputs become high impedance and all inputs are treated as “ ...
Page 13
... Bit is located at Bit D7 within 1FFF9h. Setting '1' stops the oscillator. When reset to a '0', the M48T129Y/V oscillator starts within one second. Note not necessary to set the WRITE Bit when setting or resetting the FREQUENCY TEST Bit (FT) or the STOP Bit (ST). M48T129Y, M48T129V Table 5., page 14). 13/30 ...
Page 14
... M48T129Y, M48T129V ® Table 5. TIMEKEEPER Register Map Address 1FFFFh 10 Years 1FFFEh 1FFFDh 0 0 1FFFCh 1FFFBh 0 0 1FFFAh 0 10 Minutes 1FFF9h ST 10 Seconds 1FFF8h 1FFF7h WDS BMB4 BMB3 1FFF6h AFE 0 ABE 1FFF5h RPT4 RPT5 Al 10 Date 1FFF4h RPT3 ...
Page 15
... Frequency test output frequen- cy. The IRQ/FT pin is an open drain output which re- quires a pull-up resistor for proper operation. A 500-10k resistor is recommended in order to control the rise time. The FT Bit is cleared on pow- Figure er-up. M48T129Y, M48T129V ® calibra- example, a reading of 15/30 ...
Page 16
... M48T129Y, M48T129V Figure 10. Crystal Accuracy Across Temperature Frequency (ppm –20 –40 –60 –80 –100 –120 –140 –160 –40 –30 –20 Figure 11. Calibration Waveform NORMAL POSITIVE CALIBRATION NEGATIVE CALIBRATION 16/ -0.038 ppm ( – Temperature 10% ...
Page 17
... Min ADDRESS 1FF0h RPT3 RPT2 M48T129Y, M48T129V Figure 12. A subse- Figure 13., page 18 illustrates HIGH-Z AI02581 RPT1 Alarm Activated 1 Once per Second 0 Once per Minute 0 Once per Hour 0 Once per Day ...
Page 18
... M48T129Y, M48T129V Figure 13. Back-up Mode Alarm Waveforms PFD (max) V PFD (min AFE bit in Interrupt Register AF bit in Flags Register IRQ/FT 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 ...
Page 19
... ST recommends connecting a schottky diode from V nected 1N5817 is recommended for through hole and MBRS120T3 is recommended for surface-mount). Figure 14. Supply Voltage Protection 0.1 F M48T129Y, M48T129V bus. These transients CC bus. The energy CC Figure 14.) is that drive it to values (cathode con- ...
Page 20
... M48T129Y, M48T129V MAXIMUM RATING Stressing the device above the rating 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 indicat the Operating sections of this specification is Table 7 ...
Page 21
... IN (3) Input / Output Capacitance C IO Note: 1. Effective capacitance measured with power supply at 5V (M48T129Y) or 3.3V (M48T129V); sampled only, not 100% tested 25° 1MHz. 3. Outputs deselected. ment Conditions listed in the relevant tables. De- signers should check that the operating conditions in their projects match the measurement condi- tions when using the quoted parameters ...
Page 22
... M48T129Y, M48T129V Table 10. DC Characteristics Symbol Parameter (2) Input Leakage Current I LI (2) Output Leakage Current Supply Current CC Supply Current I CC1 (Standby) TTL Supply Current I CC2 (Standby) CMOS V Input Low Voltage IL V Input High Voltage IH V Output Low Voltage OL V Output High Voltage OH Note: 1 ...
Page 23
... V F may cause corruption of RAM data. FB (1,2) M48T129Y M48T129V M48T129Y M48T129V . = 0 to 70° 4.5 to 5.5V or 3.0 to 3.6V (except where noted M48T129Y, M48T129V tR tRB tREC DON'T CARE RECOGNIZED HIGH-Z VALID Min Max 300 10 150 0 ...
Page 24
... M48T129Y, M48T129V PACKAGE MECHANICAL INFORMATION Figure 17. PMDIP32 – 32-pin Plastic DIP Module, Package Outline Note: Drawing is not to scale. Table 13. PMDIP32 – 32-pin Plastic DIP Module, Package Mechanical Data Symb Typ 24/ ...
Page 25
... Min Max 3.05 0.05 0.36 2.34 2.69 0.36 0.46 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° 44 0.10 M48T129Y, M48T129V inches Typ Min 0.002 0.092 0.014 0.006 0.697 0.324 0.032 – 0.126 0.453 0.016 0° 44 Max 0.120 0.014 0.106 0.018 0.012 0.728 0.350 – 0.142 0.500 0.050 8° 0.004 ...
Page 26
... M48T129Y, M48T129V Figure 19. SH – 4-pin SNAPHAT Housing for 48mAh Battery & Crystal, Package Outline Note: Drawing is not to scale. Table 15. SH – 4-pin SNAPHAT Housing for 48mAh Battery & Crystal, Package Mech. Data Symb Typ 26/ ...
Page 27
... Table 16. SH – 4-pin SNAPHAT Housing for 120mAh Battery & Crystal, Package Mech. Data Symb Typ 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 15.55 15.95 3.20 3.61 2.03 2.29 M48T129Y, M48T129V SHTK-A inches Typ Min Max 0.415 0.315 .0335 0.285 0.315 0.015 0.018 0.022 0.835 0.860 0.680 .0710 0.612 0.628 0.126 0.142 0.080 0.090 A2 27/30 ...
Page 28
... PFD 129V = V = 3.0 to 3.6V 2.7 to 3.0V CC PFD Speed –70 = 70ns (for M48T129Y) –85 = 85ns (for M48T129V) (1) Package PM = PMDIP32 Temperature Range 70°C Note: 1. The SOIC package (SOH44) requires the battery package (SNAPHAT “M4Txx-BR12SH” in plastic tube or “M4Txx-BR12SHTR” in Tape & Reel form. ...
Page 29
... Replace “chipset” term with “solution,” as well as related changes throughout the 26-Mar-02 2.5 document 20-May-02 2.6 Modify reflow time and temperature footnotes (Table 7) 18-Nov-02 2.7 Modified SMT text (Figure 2, 5) 24-Oct-03 2.8 Remove references to M68Zxxx (obsolete) parts (Figure 5); corrected footnote (Table 11) 22-Feb-05 3.0 Reformatted; IR reflow, SO package updates (Table 7) M48T129Y, M48T129V Revision Details 29/30 ...
Page 30
... M48T129Y, M48T129V 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 ...