DS1220Y Dallas Semiconductor, DS1220Y Datasheet
DS1220Y
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DS1220Y Summary of contents
Page 1
... The NV SRAM can be used in place of existing SRAMs directly conforming to the popular bytewide 24-pin DIP standard. The DS1220Y also matches the pinout of the 2716 EPROM or the 2816 EEPROM, allowing direct substitution while enhancing performance. There is no limit on the number of write cycles that can be executed and no additional support circuitry is required for microprocessor interfacing ...
Page 2
... OE WRITE MODE The DS1220Y executes a write cycle whenever the WE and CE signals are active (low) after address inputs are stable. The later-occurring falling edge will determine the start of the write cycle. The write cycle is terminated by the earlier rising edge All address inputs must be kept valid throughout the write cycle ...
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... See Note 10 SYMBOL MIN TYP CCS1 I CCS2 I CCO1 I CCO1 V 4.25 TP SYMBOL MIN TYP I See Note 10) A MAX UNITS NOTES 5 ± 10%) CC MAX UNITS NOTES +1 3.0 7.0 mA 2.0 4 25°C) A MAX UNITS NOTES DS1220Y ...
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... DH2 (T A DS1220Y-120 DS1220Y-150 MAX MIN MAX MIN 120 150 100 120 50 60 100 120 120 150 90 100 See Note 10; V =5.0V ± 10%) CC DS1220Y-200 UNITS MAX MIN MAX 200 ns 150 200 ns 70 100 ns 150 200 200 ns 150 DS1220Y NOTE ...
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... READ CYCLE SEE NOTE 1 WRITE CYCLE 1 SEE NOTES AND 12 WRITE CYCLE 2 SEE NOTES AND DS1220Y ...
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... SYMBOL MIN 100 REC SYMBOL MIN during a write cycle, the output buffers remain in a high impedance IH is measured from the latter MAX UNITS NOTES MAX UNITS NOTES years 9 DS1220Y ...
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... low or the WE low transition occurs prior to or simultaneously with the CE low transition, the output buffers remain in a high impedance state during this period. 9. Each DS1220Y is marked with a 4-digit date code AABB. AA designates the year of manufacture. BB designates the week of manufacture. The expected t manufacture ...
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... DS1220Y NONVOLATILE SRAM, 24-PIN 720-MIL EXTENDED MODULE PKG 24-PIN DIM MIN A IN. 1.320 MM 33.53 B IN. 0.695 MM 17.65 C IN. 0.390 MM 9.91 D IN. 0.100 MM 2.54 E IN. 0.017 MM 0.43 F IN. 0.120 MM 3.05 G IN. 0.090 MM 2. 0.590 MM 14.99 J IN. 0.008 MM 0.20 K IN. 0.015 MM 0. DS1220Y MAX 1 ...