DS1244Y-70 Maxim Integrated Products, DS1244Y-70 Datasheet
DS1244Y-70
Specifications of DS1244Y-70
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DS1244Y-70 Summary of contents
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... Available in Lead-Free Package PowerCap is a registered trademark of Maxim Integrated Products, Inc.. Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device may be simultaneously available through various sales channels. For information about device errata, click here: www.maxim-ic.com/errata. ...
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... EMOD (0.740a) 3.3 28 EMOD (0.740a) 3.3 28 EMOD (0.740a) 3.3 34 PowerCap* 3.3 34 PowerCap* 3.3 34 PowerCap* 3.3 34 PowerCap* 3.3 28 EMOD (0.740a) 5.0 28 EMOD (0.740a) 5.0 34 PowerCap* 5.0 34 PowerCap* 5 TOP MARK DS1244W-120 DS1244W-120+ DS1244W-120IND DS1244W-120IND+ DS1244WP-120 DS1244WP-120+ DS1244WP-120IND DS1244WP-120IND+ DS1244Y-70 DS1244Y-70+ DS1244YP-70 DS1244YP-70+ ...
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PIN DESCRIPTION PIN NAME EDIP PowerCap 1 1 A14/RST 1 32 A14 2 30 A12 A10 23 29 A11 ...
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DESCRIPTION The DS1244 256k NV SRAM with a Phantom clock is a fully static nonvolatile RAM (NV SRAM) (organized as 32k words by 8 bits) with a built-in real-time clock. The DS1244 has a self-contained lithium energy source and control ...
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DATA RETENTION MODE The 5V device is fully accessible and data can be written or read only when V However, when V is below the power fail point internal clock registers and SRAM are blocked from any access. ...
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PHANTOM CLOCK REGISTER INFORMATION The phantom clock information is contained in eight registers of 8 bits, each of which is sequentially accessed 1 bit at a time after the 64-bit pattern recognition sequence has been completed. When updating the phantom ...
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Figure 2. PHANTOM CLOCK REGISTER DEFINITION AM/PM/12/24 MODE Bit 7 of the hours register is defined as the 12-hour or 24-hour mode-select bit. When high, the 12-hour mode is selected. In the 12-hour mode, bit 5 is the AM/PM bit ...
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BATTERY LONGEVITY The DS1244 has a lithium power source that is designed to provide energy for clock activity and clock and RAM data retention when the V is sufficient to power the DS1244 continuously for the life of the equipment ...
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ABSOLUTE MAXIMUM RATINGS Voltage Range on Any Pin Relative to Ground……………………………………………..-0.3V to +6.0V Storage Temperature Range………………………………………………-40ºC to +85ºC (noncondensing) Soldering Temperature……………………………………….See IPC/JEDEC J-STD-020 (DIP) (Note 13) This is a stress rating only and functional operation of the device at these ...
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... Write Recovery Time Output High-Z from WE Output Active from WE Data Setup Time Data Hold Time from WE SYMBOL MIN TYP CCS1 I 2.0 CCS2 I CC01 V 2.80 2. BAT SYMBOL MIN I/O DS1244Y-70 SYMBOL MIN ACC COE ODW t 5 OEW Over the operating range (3.3V) ...
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PHANTOM CLOCK AC ELECTRICAL CHARACTERISTICS PARAMETER Read Cycle Time Access Time CE Access Time OE to Output Low Output Low Output High Output High-Z OE Read Recovery Write Cycle Time Write Pulse Width Write ...
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MEMORY AC ELECTRICAL CHARACTERISTICS PARAMETER Read Cycle Time Access Time to Output Valid OE to Output Valid Output Active OE CE Output High-Z from Deselection Output Hold from Address Change Write Cycle Time Write Pulse Width Address ...
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POWER-DOWN/POWER-UP TIMING PARAMETER at V before Power-Down Slew from PF(MAX PF(MIN Slew from PF(MAX PF(MIN ...
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MEMORY READ CYCLE (Note 1) MEMORY WRITE CYCLE 1 (Notes 2, 6, and ...
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MEMORY WRITE CYCLE 2 (Notes 2 and 8) RESET FOR PHANTOM CLOCK READ CYCLE TO PHANTOM CLOCK ...
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WRITE CYCLE TO PHANTOM CLOCK ...
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POWER-DOWN/POWER-UP CONDITION, 5V POWER-DOWN/POWER-UP CONDITION, 3. ...
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AC TEST CONDITIONS Output Load: 50pF + 1TTL Gate Input Pulse Levels Timing Measurement Reference Levels Input: 1.5V Output: 1.5V Input Pulse Rise and Fall Times: 5ns NOTES high for a read cycle. 2) ...
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... Maxim/Dallas Semiconductor cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim/Dallas Semiconductor product. No circuit patent licenses are implied. Maxim/Dallas Semiconductor reserves the right to change the circuitry and specifications without notice at any time The Maxim logo is a registered trademark of Maxim Integrated Products, Inc. The Dallas logo is a registered trademark of Dallas Semiconductor Corporation. DOCUMENT NO. 21-0245 ...