m48z18 STMicroelectronics, m48z18 Datasheet
m48z18
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m48z18 Summary of contents
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... WRITE PROTECT VOLTAGES (V = Power-fail Deselect Voltage): PFD – M48Z08 4.75 to 5.5V CC 4.5V V 4.75V PFD – M48Z18 4.5 to 5.5V CC 4.2V V 4.5V PFD SELF-CONTAINED BATTERY IN THE CAPHAT™ DIP PACKAGE PIN AND FUNCTION COMPATIBLE WITH JEDEC STANDARD SRAMs RoHS COMPLIANCE Lead-free components are compliant with the RoHS Directive ...
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... M48Z08, M48Z18 TABLE OF CONTENTS FEATURES SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Figure 1. 28-pin CAPHAT, DIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 SUMMARY DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Figure 2. Logic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Table 1. Signal Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Figure 3. DIP Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Figure 4. Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 OPERATION MODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Table 2. Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 READ Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Figure 5. READ Mode AC Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Table 3. READ Mode AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 WRITE Mode Figure 6 ...
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... DQ0-DQ7 8 E DQ0-DQ7 AI01022 A11 A10 DQ7 18 DQ6 17 DQ5 16 DQ4 DQ3 15 M48Z08, M48Z18 Address Inputs Data Inputs / Outputs Chip Enable Output Enable WRITE Enable Supply Voltage Ground Not Connected Internally 3/16 ...
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... M48Z08, M48Z18 Figure 4. Block Diagram LITHIUM CELL VOLTAGE SENSE OPERATION MODES The M48Z08/18 also has its own Power-fail Detect circuit. The control circuitry constantly monitors the single 5V supply for an out of tolerance condi- tion. When V is out of tolerance, the circuit write CC protects the SRAM, providing a high degree of Table 2 ...
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... VALID tAVQV tELQV tELQX tGLQV tGLQX (1) Parameter = 0 to 70° 4.75 to 5.5V or 4.5 to 5.5V (except where noted M48Z08, M48Z18 ) or Output Enable Access time ELQV ). , the data lines will be driven to an AVQV . If the address in- AVQV ) but will go indeterminate until the next AXQX tAXQX tEHQZ ...
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... M48Z08, M48Z18 WRITE Mode The M48Z08/ the WRITE Mode whenever W and E are active. The start of a WRITE is refer- enced from the latter occurring falling edge WRITE is terminated by the earlier rising edge The addresses must be held valid through- out the cycle ...
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... Note: 1. Valid for Ambient Operating Temperature 30pF goes low simultaneously with W going low, the outputs remain in the high impedance state. (1) Parameter = 0 to 70° 4.75 to 5.5V or 4.5 to 5.5V (except where noted M48Z08, M48Z18 M48Z08/M48Z18 Min Max 100 ...
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... M48Z08, M48Z18 Data Retention Mode With valid V applied, the M48Z08/18 operates 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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... CAUTION: Negative undershoots below –0.3V are not allowed on any pin while in the Battery Back-up mode. 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 M48Z08, M48Z18 Refer also to the Value Unit °C – ° ...
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... M48Z08, M48Z18 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 6. Operating and AC Measurement Conditions Parameter Supply Voltage (V ...
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... Outputs deselected. (1) Test Condition OUT CC Outputs open – 0. 2.1mA –1mA 70° 4.75 to 5.5V or 4.5 to 5.5V (except where noted M48Z08, M48Z18 Min Max Unit ±1 µA ±1 µ –0.3 0 0.3 2 0.4 V 2.4 V 11/16 ...
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... M48Z08, M48Z18 Figure 10. Power Down/Up Mode AC Waveforms PFD (max) V PFD (min tPD INPUTS RECOGNIZED OUTPUTS VALID (PER CONTROL INPUT) Note: Inputs may or may not be recognized at this time. Caution should be taken to keep E high as V may perform inadvertent WRITE cycles after V power on reset is being applied to the processor, a reset condition may not occur until after the system is running ...
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... Min Max 8.89 9.65 0.38 0.76 8.38 8.89 0.38 0.53 1.14 1.78 0.20 0.31 39.37 39.88 17.83 18.34 2.29 2.79 29.72 36.32 15.24 16.00 3.05 3.81 28 M48Z08, M48Z18 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 1.570 0.702 0.722 0.090 0.110 1.170 1.430 0.600 0.630 0.120 0.150 28 13/16 ...
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... M48Z08, M48Z18 PART NUMBERING Table 12. Ordering Information Scheme Example: Device Type M48Z Supply Voltage and Write Protect Voltage ( 4.75 to 5.5V 4.5 to 4.75V CC PFD 4.5 to 5.5V 4.2 to 4.5V CC PFD Speed –100 = 100ns Package PC = PCDIP28 Temperature Range 70°C Shipping Method blank = ECOPACK Package, Tubes TR = ECOPACK Package, Tape & ...
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... Remove all references to “SNAPHAT” and M48Z08Y part (Figure 2; Table 10, 12) 01-Apr-03 3.0 v2.2 template applied; updated test condition (Table 10) 28-Aug-04 4.0 Reformatted; removed references to ‘crystal’ (Figure 1) 14-Dec-05 5.0 Updated template, Lead-free text, removed footnote (Table 8, 12) M48Z08, M48Z18 Revision Details 15/16 ...
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... M48Z08, M48Z18 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 ...