DS3065W Maxim Integrated Products, DS3065W Datasheet
DS3065W
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DS3065W Summary of contents
Page 1
... Rev 0; 4/05 3.3V Single-Piece 8Mb Nonvolatile SRAM General Description The DS3065W consists of a static RAM, a nonvolatile (NV) controller, a year 2000-compliant real-time clock (RTC), and an internal rechargeable manganese lithium (ML) battery. These components are encased in a sur- face-mount module with a 256-ball BGA footprint. Whenever V is applied to the module, it recharges ...
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Single-Piece 8Mb 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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... 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 DS3065W-100 UNITS MIN MAX 100 ns 100 100 100 ...
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Single-Piece 8Mb Nonvolatile SRAM with Clock DATA RETENTION (T = +25°C.) A SYMBOL PARAMETER Expected Data-Retention Time (Per Charge) IRQ/FT and RST are open-drain outputs and cannot source current. External pullup resistors should be connected to these Note 1: ...
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Single-Piece 8Mb Nonvolatile SRAM ADDRESSES OUT (SEE NOTE 9 ACC OEC COE t ...
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Single-Piece 8Mb 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 8Mb 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 8Mb 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 8Mb 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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... BATTERY-CHARGING/SHORTING GND PROTECTION CIRCUITRY (U.L. RECOGNIZED A0–A19 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 DS3065W ...
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... Single-Piece 8Mb Nonvolatile SRAM Detailed Description The DS3065W is an 8Mb (1024k x 8 bits) fully static, NV memory similar in function and organization to the DS1265W NV SRAM, but also containing an RTC and rechargeable ML battery. The DS3065W 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 DS3065W 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 DS3065W 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 8Mb 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 8Mb Nonvolatile SRAM A0–A3 IRQ/FT Figure 2. Prevent Accidental Clearing of IRQ Waveforms V CC ABE HIGH IRQ/FT IMPEDANCE Figure 3. Battery Back-up Mode Alarm Waveforms INADVERTENT WRITE OR READ OF ...
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... A 96 hour initial bat- tery charge time is recommended for new system CC installations. without additional To achieve the best results when using the DS3065W, assure that all V ), the SW decouple the power supply with a 0.1µF capacitor. Use a high-quality, ceramic surface-mount capacitor if pos- sible ...
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... Once the battery is charged its lifetime depends primarily on the V The DS3065W 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 DS3065W to be charged hundreds of times, and extending the service life well beyond 40 years ...
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... For the latest package outline information go to www.maxim-ic.com/packages.) DS3065W 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 ...