X9448-2.7 XICOR [Xicor Inc.], X9448-2.7 Datasheet
X9448-2.7
Related parts for X9448-2.7
X9448-2.7 Summary of contents
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... The X9448 integrates two nonvolatile digitally con- trolled potentiometers (XDCP) and two voltage com- parators on a CMOS monolithic microcircuit. The X9448 contains two resistor arrays, each com- posed of 63 resistive elements. Between each element and at either end are tap points accessible to the wiper elements ...
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... The address inputs are used to set the least significant 4 bits of the 8-bit slave address. A match in the slave address serial data stream must be made with the address input in order to initiate communication with the X9448. A maximum of 16 devices may share the same 2-wire serial bus. Potentiometer Pins V (V – ...
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... If the command is followed by a data byte the X9448 will respond with a final acknowledge. Array Description The X9448 is comprised of two resistor arrays and two voltage comparators. Each array contains 63 discrete resistive segments that are connected in series. The physical ends of each array are equivalent to the fixed terminals of a mechanical potentiometer (V inputs) ...
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... ACK polling (Flow 1) can be initiated immediately. This involves issuing the start condition with W followed by the device slave address. If the X9448 is still busy with the write operation no ACK will be returned. If the X9448 has completed the write opera- tion an ACK will be returned and the master can then proceed with the next operation ...
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... Four instructions require a three-byte sequence to complete. The basic sequence is illustrated in Figure 4. These instructions transfer data between the host and the X9448; either between the host and one of the data registers or directly between the host and the wiper counter and analog control registers. These instruc- ...
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... X9448 Figure 5. Increment/Decrement Command Sequence SCL SDA INSTRUCTION SET Read Wiper Counter Register (WCR) or Analog Control Register (ACR) Read the contents of the Wiper Counter Register or Analog Control Register pointed device type device S T identifier ...
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... X9448 Write Data Register (DR) Write new value to the Register pointed device type device instruction S T identifier addresses Transfer Data Register to Wiper Counter Register or Analog Control Register Transfer the contents of the Register pointed ...
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... Wiper Counter (WCR) and Analog Control Registers (ACR) The X9448 contains two wiper counter registers one for each XDCP potentiometer and two analog control registers, one for each of the two voltage comparators. The wiper counter register is equivalent to a serial-in, parallel-out counter with its outputs decoded to select one of sixty-four switches along its resistor array ...
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... X9448 Latch “1” indicates the output of the voltage comparator is memorized or latched. “0” indicates the output of the voltage comparator is not latched. Userbits—available for user applications Data Registers (DR, R0-R3) Wiper Position or Analog Control Data or User Data (Nonvolatile) REV 1.0 6/21/00 Memory Map WCRO ...
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... SS .................... -7V not implied. Exposure to absolute maximum rating con- SS ditions for extended periods may affect device reliability. Max. Device ° C +70 X9448 ° C +85 X9448-2.7 +125°C Limits Min. Typ. Max. –20 +20 50 – 100 ...
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... X9448 COMPARATOR ELECTRICAL CHARACTERISTICS (Over the recommended operating conditions unless otherwise specified.) Symbol Parameter V Input offset voltage OS I Input current B V Input voltage range IR t Response time R I Output current O A Voltage gain V PSRR Power supply rejection ratio V Output voltage range ...
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... X9448 CAPACITANCE Symbol C Input/output capacitance (SDA) I/O C Input capacitance (A0, A1, A2, A3, and SCL Potentiometer capacitance Power-Up Timing and Sequence (1) Power up sequence : ( Power down sequence: no limitation A.C. TEST CONDITIONS I nput pulse levels V Input rise and fall times 10ns Input and output timing level ...
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... X9448 Output Timing SCL SDA XDCP Timing (for All Load Instructions) SCL SDA VWx XDCP Timing (for Increment/Decrement Instruction) SCL Wiper Register Address SDA VWx Write Protect and Device Address Pins Timing SCL SDA WP A0, A1 A2, A3 REV 1.0 6/21/ LSB t WRL Inc/Dec ...
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... X9448 AC Timing Symbol f Clock frequency SCL t Clock cycle time CYC t Clock high time HIGH t Clock low time LOW t Start setup time SU:STA t Start hold time HD:STA t Stop setup time SU:STO t SDA data input setup time SU:DAT (4) t SDA data input hold time ...
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... X9448 BASIC APPLICATIONS Programmable Level Detector with Memory (typical bias conditions) SCL SCL SDA SDA 9448 Programmable Window Detector with Memory SCL SDA –5V For the signal voltage V > the upper limit < the lower limit V S ≤ V ≤ V For the window V ...
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... X9448 BASIC APPLICATION (continued) Programmable Oscillator with Memory SCL SDA Frequency µ Duty Cycle µ R Programmable Schmitt Trigger with Memory ------------------ - V – ----- - V min UL W OUT ------------------ - V ----- - – max LL W OUT REV 1 ...
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... X9448 BASIC APPLICATION (continued) Programmable Level Detector (alternate technique < High for V – ----- - V OUT > Low for V – ----- - V OUT POT Programmable Time Delay with Memory + ...
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... X9448 PACKAGING INFORMATION 24-Lead Plastic Small Outline Gull Wing Package Type S Pin 1 Index Pin 1 (4X) 7° 0.050 (1.27) 0.010 (0.25) 0.020 (0.50) 0° – 8° 0.015 (0.40) 0.050 (1.27) NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS) REV 1.0 6/21/00 0.014 (0.35) 0.020 (0.50) 0.598 (15.20) 0.610 (15.49) X 45° 0.009 (0.22) 0.420" 0.013 (0.33) FOOTPRINT www ...
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... X9448 PACKAGING INFORMATION .026 (.65) BSC .303 (7.70) .311 (7.90) .0075 (.19) .0118 (.30) 0°–8° .020 (.50) .030 (.75) Detail A (20X) See Detail “A” NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS) REV 1.0 6/21/00 24-Lead Plastic, TSSOP Package Type V .169 (4.3) .252 (6.4) BSC .177 (4.5) .047 (1.20) .002 (.06) .005 (.15) ...
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... X9448 ORDERING INFORMATION X9448 Device LIMITED WARRANTY Devices sold by Xicor, Inc. are covered by the warranty and patent indemnification provisions appearing in its Terms of Sale only. Xicor, Inc. makes no warranty, express, statutory, implied description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. ...