M48T59Y-70PC1 STMicroelectronics, M48T59Y-70PC1 Datasheet
M48T59Y-70PC1
Specifications of M48T59Y-70PC1
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M48T59Y-70PC1 Summary of contents
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... Frequency test output for real-time clock software calibration ■ Automatic power-fail chip deselect and WRITE protection ■ WRITE protect voltages (V = Power-fail deselect voltage): PFD – M48T59 4. 4.75 V PFD – M48T59Y 4 4.5 V PFD (a) – M48T59V : V = 3 3.0 V PFD ■ ...
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Contents 1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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List of tables Table 1. Signal names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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List of figures Figure 1. Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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... Do not place the SNAPHAT battery/crystal top in conductive foam, as this will drain the lithium button-cell battery. Figure 1. Logic diagram ® RAM non-volatile static RAM and real-time ® housing containing the battery and crystal. The A0-A12 M48T59 W M48T59Y M48T59V Table 19 on page 30). DQ0-DQ7 IRQ/FT RST AI01380E 5/32 ...
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... Supply voltage Ground RST 1 28 A12 M48T59Y M48T59V DQ0 11 18 DQ1 12 17 DQ2 AI01382E RST A12 IRQ/ A11 M48T59 A10 M48T59Y DQ7 DQ0 11 18 DQ6 DQ1 12 17 DQ5 DQ2 13 16 DQ4 DQ3 AI01381D IRQ/ A11 G A10 E DQ7 DQ6 DQ5 DQ4 DQ3 ...
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Figure 4. Block diagram OSCILLATOR AND CLOCK CHAIN 32,768 Hz CRYSTAL LITHIUM CELL VOLTAGE SENSE SWITCHING V CC IRQ/FT POWER V PFD AND CIRCUITRY RST BiPORT SRAM ARRAY A0-A12 DQ0-DQ7 8176 x 8 SRAM ARRAY E W ...
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Operation modes As Figure 4 on page 7 oscillator of the M48T59/Y/V 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 ...
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The state of the eight three-state Data I/O signals is controlled by E and G. If the outputs are activated before t AVQV the Address Inputs are changed while E and G remain active, output data will remain valid for ...
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Write mode The M48T59/Y 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 ...
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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 ...
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... The STOP Bit is the MSB of the seconds register. Setting '1' stops the oscillator. The M48T59/Y/V in the DIP package is shipped from STMicroelectronics with the STOP Bit set to a '1.' When reset to a '0,' the M48T59/Y/V oscillator starts within one second ...
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Table 5. Register map Address 1FFFh 10 Years 1FFEh 1FFDh date 1FFCh 0 FT CEB 1FFBh hours 1FFAh 0 10 minutes 1FF9h ST 10 seconds 1FF8h W R ...
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Calibrating the clock The M48T59/Y/V is driven by a quartz-controlled oscillator with a nominal frequency of 32,768 Hz. The devices are tested not to exceed 35 PPM (parts per million) oscillator frequency error at 25°C, which equates to about ...
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Figure 8. Crystal accuracy across temperature Frequency (ppm –20 –40 –60 –80 –100 –120 –140 –160 –40 –30 –20 Figure 9. Clock calibration NORMAL POSITIVE CALIBRATION NEGATIVE CALIBRATION 3.5 Setting the alarm clock Registers 1FF5h-1FF2h contain the alarm ...
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IRQ/FT pin. To disable the alarm, write '0' to the Alarm Date Register and RPT1-4. The Alarm Flag and the IRQ/FT output are cleared by a READ to the Flags Register as shown in Register is ...
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Figure 11. Back-up mode alarm waveforms PFD (max) V PFD (min ABE, AFE bit in Interrupt Register AF bit in Flags Register IRQ/FT 3.6 Watchdog timer The watchdog timer can be used to detect an ...
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Power-on reset The M48T59/Y/V continuously monitors V point, the RST pulls low (open drain) and remains low on power-up for t V (max). RST is valid for all V PFD appropriate resistor to V 3.8 Programmable interrupts The M48T59/Y/V ...
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Century bit Bit D5 and D4 of Clock Register 1FFCh contain the CENTURY ENABLE Bit (CEB) and the CENTURY Bit (CB). Setting CEB to a '1' will cause CB to toggle, either from a '0' to '1' or from ...
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Figure 12. Supply voltage protection 20/ 0.1 F DEVICE V SS AI02169 ...
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... Caution: Negative undershoots below –0.3 V are not allowed on any pin while in the Battery Back-up mode. Caution: Do NOT wave solder SOIC to avoid damaging SNAPHAT sockets. Parameter off, oscillator off) CC M48T59/M48T59Y M48T59V Value Unit °C – °C 260 ° ...
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... Effective capacitance measured with power supply sampled only, not 100% tested 25° MHz. 3. Outputs deselected. 22/32 M48T59 ) 4. 100 1.5 645 DEVICE UNDER TEST 100pF C L includes JIG capacitance (1)(2) Parameters Table M48T59Y M48T59V 4.5 to 5.5 3 100 1.5 1.5 (1) 1.75V AI02325 Min Max Unit ...
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Table 11. DC characteristics Symbol Parameter I Input leakage current LI (2) I Output leakage current LO I Supply current CC I Supply current (standby) TTL CC1 I Supply current (standby) CMOS CC2 V Input low voltage IL V Input ...
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... CC (min) V rise time PFD 70° (min) fall time of less than t may result in deselection/write protection not occurring F passes V (min). PFD may cause corruption of RAM data. FB (1)(2) Parameter M48T59 M48T59Y M48T59V M48T59/Y M48T59V = 0 to 70° Min Max Unit 0 300 200 = 4.5 to 5.5 V, 4. 3.0 to 3.6 V ...
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Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK packages. These packages have a Lead-free second level interconnect. The category of second Level Interconnect is marked on the package and on the inner ...
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Figure 16. SOH28 – 28-lead plastic small outline, battery SNAPHAT, package outline B Note: Drawing is not to scale. Table 15. SOH28 – 28-lead plastic small outline, battery SNAPHAT, pack. mech. data Symb Typ ...
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Figure 17. SH – 4-pin SNAPHAT housing for 48mAh battery & crystal, package outline Note: Drawing is not to scale. Table 16. SH – 4-pin SNAPHAT housing for 48mAh battery & crystal, package mech. data Symb Typ ...
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Figure 18. SH – 4-pin SNAPHAT housing for 120mAh battery & crystal, package outline Note: Drawing is not to scale. Table 17. SH – 4-pin SNAPHAT housing for 120mAh battery & crystal, package mech. data Symb Typ ...
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Part numbering Table 18. Ordering information scheme Example: Device type M48T Supply voltage and write protect voltage ( 4. 59Y = V = 4 (2) ...
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Table 19. SNAPHAT battery table Part number M4T28-BR12SH1 M4T32-BR12SHx 30/32 Description Lithium battery (48mAh) SNAPHAT Lithium battery (120mAh) SNAPHAT Package SH SH ...
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Revision history Table 20. Document revision history Date Revision Oct-1999 22-Mar-2000 13-Jul-2000 14-May-2001 31-Jul-2001 06-Aug-2001 20-May-2002 07-Aug-2002 01-Apr-2003 02-Apr-2004 25-Nov-2004 01-Apr-2008 1.0 First Issue 1.1 Century Bit Paragraph added; t 2.0 From Preliminary Data to Data Sheet Reformatted, Ind. ...
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... Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...