X5645 XICOR [Xicor Inc.], X5645 Datasheet
X5645
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X5645 Summary of contents
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... Watchdog Timebase 16Kbits 32Kbits Power On and Low Voltage + Generation - V TRIP www.xicor.com detection circuitry protects the CC falls below the minimum V CC returns CC thresholds are available, however, RESET/RESET Reset & X5643 = RESET X5645 = RESET Reset Characteristics subject to change without notice ...
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... X5643/X5645 PIN CONFIGURATION 8-Lead PDIP 1 8 CS/WDI X5643/ Pin Pin Pin PDIP SOIC TSSOP Name 1 2 & CS/WDI SCK & RESET/ RESET 4–6, 14 9– ...
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... X5643/X5645 PRINCIPLES OF OPERATION Power On Reset Application of power to the X5643/X5645 activates a power on reset circuit. This circuit goes active at about 1V and pulls the RESET/RESET pin active. This signal prevents the system microprocessor from starting to operate with insufficient voltage or prior to stabilization of the oscillator. When V ...
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... X5643/X5645 Figure 3. V Programming Sequence Flow Chart TRIP New V Applied = CC Old V Applied + Error CC Emax = Maximum Desired Error REV 1.1.1 3/5/01 V Programming TRIP Execute Reset V TRIP Sequence Set Applied = CC CC Desired V TRIP Execute Set V TRIP Sequence Apply Decrement 10mV) ...
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... X5643/X5645 Figure 4. Sample V Reset Circuit TRIP 4.7K V TRIP Adj. Program SPI SERIAL MEMORY The memory portion of the device is a CMOS serial EEPROM array with Xicor’s block lock protection. The array is internally organized The device features a Serial Peripheral Interface (SPI) and software proto- col allowing operation on a simple four-wire bus. The device utilizes Xicor’ ...
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... Any portion of the array that is block lock pro- tected can be read but not written. It will remain pro- tected until the BL bits are altered to disable block lock protection of that portion of memory. Status Register Bits Array Addresses Protected BL1 BL0 X5643/X5645 $1800–$1FFF 1 0 $1000–$1FFF ...
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... X5643/X5645 Figure 5. Read EEPROM Array Sequence SCK Instruction SI High Impedance SO Setting the WP pin LOW while WPEN is a “1” while an internal write cycle to the status register is in progress will not stop this write operation, but the operation dis- ables subsequent write attempts to the status register. ...
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... X5643/X5645 For the page write operation (byte or page write completed, CS can only be brought HIGH after bit 0 of the last data byte to be written is clocked in brought HIGH at any other time, the write operation will not be completed (Figure 4). To write to the status register, the WRSR instruction is followed by the data to be written (Figure 5). Data bits 0 and 1 must be “ ...
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... X5643/X5645 Figure 8. Write Sequence SCK Instruction SCK Data Byte Figure 9. Status Register Write Sequence CS 0 SCK SI High Impedance SO SYMBOL TABLE WAVEFORM INPUTS OUTPUTS Must be Will be steady steady May change Will change ...
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... X5643/X5645 ABSOLUTE MAXIMUM RATINGS Temperature under bias ...................–65°C to +135°C Storage temperature ........................–65°C to +150°C Voltage on any pin with respect to V D.C. output current ............................................... 5mA Lead temperature (soldering, 10 seconds).........300°C RECOMMENDED OPERATING CONDITIONS Temperature Min. Commercial 0°C Industrial –40°C D.C. OPERATING CHARACTERISTICS (Over the recommended operating conditions unless otherwise specifi ...
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... X5643/X5645 CAPACITANCE T = +25° 1MHz Symbol (2) C Output Capacitance (SO, RESET/RESET) OUT (2) C Input Capacitance (SCK, SI, CS, WP) IN Notes: (1) V min. and V max. are for reference only and are not tested (2) This parameter is periodically sampled and not 100% tested. EQUIVALENT A.C. LOAD CIRCUIT 2.06KΩ ...
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... X5643/X5645 Serial Input Timing CS t LEAD SCK MSB IN High Impedance SO Serial Output Timing Symbol f Clock frequency SCK t Output disable time DIS t Output valid from clock low V t Output hold time HO (3) t Output rise time RO (3) t Output fall time FO Notes: (3) This parameter is periodically sampled and not 100% tested. ...
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... RESET Output Timing Symbol V Reset trip point voltage, X5643-4.5A, X5643-4.5A TRIP Reset trip point voltage, X5643, X5645 Reset trip point voltage, X5643-2.7A, X5645-2.7A Reset trip point voltage, X5643-2.7, X5645-2 hysteresis (HIGH to LOW vs. LOW to HIGH V TH TRIP t Power-up reset time out ...
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... X5643/X5645 RESET/RESET Output Timing Symbol Parameter t Watchdog time out period, WDO WD1 = 1, WD0 = 0 WD1 = 0, WD0 = 1 WD1 = 0, WD0 = pulse width to reset the watchdog CST t Reset time out RST V Set Conditions TRIP TRIP SCK Reset Conditions TRIP ...
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... X5643/X5645 V Programming Specifications V TRIP Parameter t SCK V program voltage setup time VPS TRIP t SCK V program voltage hold time VPH TRIP t V program pulse width P TRIP t V level setup time TSU TRIP t V level hold (stable) time THD TRIP t V write cycle time ...
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... X5643/X5645 TYPICAL PERFORMANCE V Supply Current vs. Temperature ( Watchdog Timer Watchdog Timer Watchdog Timer Off ( –40 25 Temp (°C) V vs. Temperature (programmed at 25°C) TRIP 5.025 5.000 4.975 3.525 3.500 3.475 2.525 2.500 2.475 0 25 ...
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... X5643/X5645 PACKAGING INFORMATION Half Shoulder Width On All End Pins Optional .073 (1.84) Typ. 0.010 (0.25) NOTE: 1. ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS) 2. PACKAGE DIMENSIONS EXCLUDE MOLDING FLASH REV 1.1.1 3/5/01 8-Lead Plastic Dual In-Line Package Type P 0.430 (10.92) 0.360 (9.14) Pin 1 Index Pin 1 0.300 (7.62) Ref. Seating Plane 0.150 (3.81) ...
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... X5643/X5645 PACKAGING INFORMATION 14-Lead Plastic Small Outline Gullwing Package Type S Pin 1 Index Pin 1 0.014 (0.35) 0.020 (0.51) (4X) 7° 0.050 (1.27) 0.010 (0.25) 0.020 (0.50) 0° – 8° 0.016 (0.410) 0.037 (0.937) NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS) REV 1.1.1 3/5/01 0.150 (3.80) 0.158 (4.00) 0.336 (8.55) 0.345 (8.75) 0.004 (0.10) 0.010 (0.25) X 45° ...
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... ±10%, –40°C to +85° 2.7V to 5.5V, 0°C to +70° 2.7V to 5.5V, 0°C to +70° 2.7V to 5.5V, –40°C to +85° 2.7V to 5.5V, –40°C to +85°C, V www.xicor.com Part Number RESET (Active HIGH) X5645P-4.5A X5645S14-4.5A X5645S14I-4.5A X5645P X5645S14 X5645S14I X5645S14-2.7A X5645S14-2.7 = 4.25-4.5 TRIP = 4.5-4.75 = 4.25-4.5 = 4.5-4.75 TRIP = 2.55-2.7 TRIP = 2.85-3.0 TRIP = 2 ...