DS3050W-100# Maxim Integrated Products, DS3050W-100# Datasheet
DS3050W-100#
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DS3050W-100# Summary of contents
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... RAID Systems and Servers POS Terminals Industrial Controllers Data-Acquisition Systems PART TEMP RANGE DS3050W-100# -40°C to +85°C #Denotes a RoHS-compliant device that may include lead that is exempt under the RoHS requirements. MICROPROCESSOR OR DSP DATA ADDRESS Pin Configuration appears at end of data sheet. ...
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Single-Piece 4Mb Nonvolatile SRAM with Clock ABSOLUTE MAXIMUM RATINGS Voltage Range on Any Pin Relative to Ground......-0.3V to +4.6V Operating Temperature Range ...........................-40°C to +85°C Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the ...
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... (Note 4) WR1 t (Note 5) WR2 t (Note 2) ODW t (Note 2) OEW t (Note (Note 4) DH1 t (Note 5) DH2 t CCS CONDITIONS t (Note REC t (Note 1) RPD t (Note 1) RPU _____________________________________________________________________ with Clock DS3050W-100 UNITS MIN MAX 100 ns 100 100 100 MIN TYP MAX UNITS 1.5 µs 150 µs 150 µ ...
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Single-Piece 4Mb Nonvolatile SRAM with Clock DATA RETENTION (T = +25°C.) A SYMBOL PARAMETER Expected Data-Retention Time (Per Charge) AC TEST CONDITIONS Input Pulse Levels: Input Pulse Rise and Fall Times: Input and Output Timing Reference Level: Output Load: ...
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Single-Piece 4Mb Nonvolatile SRAM ADDRESSES OUT (SEE NOTE 9.) _____________________________________________________________________ ACC OEC ...
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Single-Piece 4Mb Nonvolatile SRAM with Clock ADDRESSES OUT D IN (SEE NOTES 10–13.) ADDRESSES OUT D IN (SEE NOTES 10–13.) 6 ...
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Single-Piece 4Mb Nonvolatile SRAM 2. CE, WE AND CS BACKUP CURRENT SUPPLIED FROM LITHIUM BATTERY RST (SEE NOTES 1, 7 3.3V +25°C, unless otherwise noted.) CC ...
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Single-Piece 4Mb Nonvolatile SRAM with Clock (V = 3.3V +25°C, unless otherwise noted PERCENT CHANGE CHARGE vs. TEMPERATURE 1 3.3V BAT CHARGE 0.5 0 -0.5 -1.0 -40 -15 ...
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Single-Piece 4Mb Nonvolatile SRAM BALLS NAME A1, A2, A3, A4 GND Ground Interrupt/Frequency Test IRQ/FT B1, B2, B3, B4 Output C1, C2, C3, C4 A15 Address Input 15 D1, D2, D3, D4 A16 Address Input 16 RST E1, E2, ...
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... SW ML BATTERY-CHARGING/SHORTING GND PROTECTION CIRCUITRY (U.L. RECOGNIZED A0–A18 10 ____________________________________________________________________ 32.768kHz CS A0-A3 REAL-TIME CLOCK WE OE DELAY TIMING CIRCUITRY CHARGER REDUNDANT LOGIC REDUNDANT CURRENT-LIMITING SERIES FET RESISTOR Functional Diagram IRQ/FT RST UNINTERRUPTED POWER SUPPLY FOR THE SRAM AND RTC SRAM DQ0–7 WE DS3050W ...
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... Single-Piece 4Mb Nonvolatile SRAM Detailed Description The DS3050W is a 4Mb (512k x 8 bits) fully static, NV memory similar in function and organization to the DS1250W NV SRAM, but also containing an RTC and rechargeable ML battery. The DS3050W NV SRAM con- stantly monitors V for an out-of-tolerance condition. CC When such a condition occurs, the lithium energy source is automatically switched on and write protection is unconditionally enabled to prevent data corruption ...
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... BMB0–BMB4 = Watchdog multiplier bits. RB0, RB1 = Watchdog resolution bits. 12 ____________________________________________________________________ The DS3050W executes an SRAM write cycle whenever CS is inactive (high) and the CE and WE signals are active (low) after address inputs are stable. The later- occurring falling edge determines the start of the write cycle ...
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... The alarm can be programmed to activate on a specific day of the month or repeat every day, hour, minute, or second. It can also be programmed to go off while the DS3050W is in the Data Retention Mode to serve as a system wake-up. Alarm mask bits AM1 to AM4 control the alarm mode (see Table 3). Configurations not listed in the table will default to the once-per-second mode to notify the user of an incorrect alarm setting ...
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Single-Piece 4Mb Nonvolatile SRAM with Clock Table 3. Alarm Mask Bits AM4 AM3 AM2 When the RTC register values match alarm register set- tings, ...
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Single-Piece 4Mb Nonvolatile SRAM A0–A3 IRQ/FT Figure 2. Prevent Accidental Clearing of IRQ Waveforms V CC ABE IRQ/FT HIGH IMPEDANCE Figure 3. Battery Backup Mode Alarm Waveforms INADVERTENT WRITE OR READ OF ...
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... WATCHDOG register. The watchdog function is automatically dis- abled upon power-up and the WATCHDOG register is cleared to 00h. The DS3050W module is trimmed at the factory to an accuracy of 1 minute per month at +25°C. Power-On Default States Upon each application of power to the device, the fol- lowing register bits are automatically set to 0: WDS = 0, BMB0– ...
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... Once the battery is charged its lifetime depends primarily on the V The DS3050W can maintain data from a single, initial charge for years. Once recharged, this deep- discharge cycle can be repeated for times, producing a worst-case service life of 40 years. More typical duty cycles are of shorter duration, enabling the DS3050W to be charged hundreds of times, and extending the service life well beyond 40 years ...
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... Revision History Pages changed at Rev2 DS3050W BGA modules are recognized by Underwriters Laboratory (UL) under file E99151. 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. ...