DS1744W-120IND Maxim Integrated Products, DS1744W-120IND Datasheet
DS1744W-120IND
Specifications of DS1744W-120IND
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DS1744W-120IND Summary of contents
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Rev 9/10 www.maxim-ic.com FEATURES Integrated NV SRAM, Real-Time Clock, Crystal, Power-Fail Control Circuit, and Lithium Energy Source Clock Registers are Accessed Identically to the Static RAM. These Registers are Resident in the Eight Top RAM Locations. ...
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PIN DESCRIPTION PIN NAME EDIP PowerCap 1 32 A14 2 30 A12 A10 23 ...
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... ORDERING INFORMATION VOLTAGE PART (V) DS1744-70+ 5.0 DS1744-70IND+ 5.0 DS1744W-120+ 3.3 DS1744W-120IND+ 3.3 DS1744P-70+ 5.0 DS1744P-70IND+ 5.0 DS1744WP-120+ 3.3 DS1744WP-120IND+ 3.3 +Denotes a lead(Pb)-free/RoHS-compliant package. *DS9034-PCX+ or DS9034I-PCX+ required (must be ordered separately). **A “+” anywhere in the top mark denotes a lead-free device. An “IND” denotes an industrial temperature grade device. ...
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Figure 1. DS1744/DS1744P Block Diagram PACKAGES The DS1744 is available in two packages (28-pin encapsulated DIP and 34-pin PowerCap module). The 28-pin EDIP module integrates the crystal, lithium energy source, and silicon all in one package. The 34- pin PowerCap ...
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Table 1. Truth Table > < V < < V < SETTING THE ...
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Table 2. Register Map ADDRESS B7 B6 7FFF 10 Year 7FFE X X 7FFD X X 7FFC BF FT 7FFB X X 7FFA X OSC 7FF9 7FF8 W R OSC = Stop Bit R = Read Bit W = Write ...
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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. At this ...
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ABSOLUTE MAXIMUM RATINGS Voltage Range on Any Pin Relative to Ground……………..…….…...……..……..……...……………..…-0.3V to +6.0V Storage Temperature Range EDIP..........................……………………..………………………………………………………...-40°C to +85°C PowerCap..................……………………..……………………………………………………….-55°C to +125°C Lead Temperature (soldering, 10s)……….................................................................………………………………..+260°C Note: EDIP is hand or wave-soldered only. Soldering Temperature (reflow, PowerCap).................................................................................................................+260°C This is a ...
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DC ELECTRICAL CHARACTERISTICS = 3.3V 10 Over the operating range PARAMETER Active Supply Current TTL Standby Current ( CMOS Standby Current ( CE 0.2V) CC Input Leakage ...
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AC CHARACTERISTICS—READ CYCLE (3.3V) = 3.3V 10 Over the operating range PARAMETER Read Cycle Time Address Access Time Low-Z CE Access Time CE Data Off Time Low-Z OE Access ...
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AC CHARACTERISTICS—WRITE CYCLE (5V) = 5.0V 10 Over the operating range PARAMETER Write Cycle Time Address Setup Time WE Pulse Width CE Pulse Width Data Setup Time Data Hold Time Data Hold Time Address Hold ...
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WRITE CYCLE TIMING DIAGRAM, WRITE-ENABLE CONTROLLED WRITE CYCLE TIMING DIAGRAM, CHIP-ENABLE CONTROLLED DS1744/DS1744P Y2K-Compliant, Nonvolatile Timekeeping RAMs ...
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POWER-UP/DOWN AC CHARACTERISTICS (5V) = 5.0V 10 Over the operating range PARAMETER Before Power-Down IH V Fall Time PF(MAX) PF(MIN) V Fall Time ...
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POWER-UP/DOWN CHARACTERISTICS (3.3V) = 3.3V 10 Over the operating range PARAMETER Before Power- IH Down V Fall Time PF(MAX) PF(MIN) V Rise Time ...
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AC TEST CONDITIONS Output Load: 50pF + 1TTL Gate Input Pulse Levels 3.0V Timing Measurement Reference Levels: Input: 1.5V Output: 1.5V Input Pulse Rise and Fall Times: 5ns NOTES: 1) Voltages are referenced to ground. 2) Typical values ...
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... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time 2010 Maxim Integrated Products DS1744/DS1744P Y2K-Compliant, Nonvolatile Timekeeping RAMs DESCRIPTION Maxim and the Dallas logo are registered trademarks of Maxim Integrated Products. PAGES CHANGED ...