m48z35y STMicroelectronics, m48z35y Datasheet
m48z35y
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m48z35y Summary of contents
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... Automatic power-fail chip deselect and WRITE protection ■ WRITE protect voltages Power-fail Deselect Voltage) PFD – M48Z35 4.75 to 5.5V CC 4.5V V 4.75V PFD – M48Z35Y: 4.5 to 5.5V 4.2v V 4.5v pfd ■ Self-contained battery in the CAPHAT™ DIP package ■ Packaging includes a 28-lead SOIC and ® SNAPHAT top (to be ordered separately) ■ ...
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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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... The SOIC and battery packages are shipped separately in plastic anti-static tubes or in Tape & Reel form. For the 28-lead SOIC, the battery package (i.e. SNAPHAT) part number is “M4Z28- BR00SH1.” Figure 1. Logic diagram ® RAM is a 32K x 8, non-volatile static RAM that integrates A0-A14 W M48Z35 M48Z35Y DQ0-DQ7 AI01616D 5/23 ...
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... DQ4 DQ3 AI01617D A14 A12 A13 A11 M48Z35Y A10 DQ7 DQ0 11 18 DQ6 DQ1 12 17 DQ5 DQ2 13 16 DQ4 DQ3 AI02303C ...
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Figure 4. Block diagram LITHIUM CELL VOLTAGE SENSE SWITCHING POWER AND V PFD CIRCUITRY V CC A0-A14 DQ0-DQ7 32K x 8 SRAM ARRAY AI01619B 7/23 ...
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Operating modes The M48Z35/Y also has its own Power-fail Detect circuit. The control circuitry constantly monitors the single 5V supply for an out of tolerance condition. When V tolerance, the circuit write protects the SRAM, providing a high degree ...
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Figure 5. Read mode AC waveforms A0-A14 E G DQ0-DQ7 Note: WRITE Enable (W) = High. Table 3. Read mode AC characteristics Symbol t READ cycle time AVAV (2) t Address valid to output valid AVQV (2) t Chip enable ...
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Write mode The M48Z35 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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... A power failure during a WRITE cycle may corrupt data at the currently addressed location, but does not jeopardize the rest of the RAM's content. At voltages below V user can be assured the memory will write protected state, provided the V is not less than t . The M48Z35/Y may respond to transient noise spikes on V ...
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... V = 4.75 to 5.5V or 4.5 to 5.5V (except where noted may result in deselection/write protection not occurring until 200µs after F may cause corruption of RAM data. FB (1) Min M48Z35 4.5 M48Z35Y 4.2 M48Z35 70° 4.75 to 5.5V or 4.5 to 5.5V (except where noted tRB trec RECOGNIZED ...
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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 ...
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... These are stress ratings only and operation of the device at these or any other conditions above those indicated in the Operating sections of this specification is not implied. Exposure to Absolute Maximum Rating conditions for extended periods may affect device reliability. Refer also to the STMicroelectronics SURE Program and other relevant quality documents. Table 7. ...
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... At 25°C. conditions. Designers should check that the operating Parameter ) ) 645 DEVICE UNDER TEST 100pF or 5pF C L includes JIG capacitance (1)(2) Parameter Min Table 8: M48Z35 M48Z35Y 4.75 to 5.5V 4 100 100 1.5 1.5 1.75V AI03211 Max Unit ...
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Table 10. DC characteristics Symbol Parameter (2) 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 ...
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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 12. SOH28 – 28-lead plastic small outline, battery SNAPHAT, package outline B Note: Drawing is not to scale. Table 12. SOH28 – 28-lead plastic small outline, battery SNAPHAT, pack. mech. data Symbol Typ ...
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Figure 13. SH – 4-pin SNAPHAT housing for 48mAh battery, package outline Note: Drawing is not to scale. Table 13. SH – 4-pin SNAPHAT housing for 48mAh battery, pack. mech. data Symbol Typ ...
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Figure 14. SH – 4-pin SNAPHAT housing for 120mAh battery, package outline Note: Drawing is not to scale. Table 14. SH – 4-pin SNAPHAT housing for 120mAh battery, pack. mech. data Symb Typ ...
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Part numbering Table 15. Ordering information scheme Example: Device type M48Z Supply voltage and write protect voltage ( 4.75 to 5.5V 35Y = V = 4.5 to 5.5V Speed –70 = ...
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Revision history Table 17. Document revision history Date Revision August 1999 21-Apr-00 10-May-01 29-May-02 02-Apr-03 03-Mar-04 20-Aug-04 09-Jun-05 02-Nov-2007 22/23 1.0 First Issue 1.1 SH and SH28 packages for 2-pin and 2-socket removed 2.0 Reformatted; added temperature information 2.1 ...
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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. ...