X9258 Xicor, X9258 Datasheet
X9258
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X9258 Summary of contents
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... A2 A3 Data REV 1.1.7 2/4/03 X9258 DESCRIPTION The X9258 potentiometers (XDCP monolithic CMOS integrated circuit. The digitally controlled potentiometer is implemented using 255 resistive elements in a series array. Between each element are tap points connected to the wiper terminal through switches. The position of the ...
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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 communication with the X9258. A maximum of 16 devices may occupy the 2-wire serial bus. Potentiometer Pins –V ...
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... Device Addressing Following a start condition the master must output the address of the slave it is accessing. The most significant four bits of the slave address are the device type identifier (refer to Figure 1 below). For the X9258 this is fixed as 0101[B]. www.xicor.com /R and V /R inputs) ...
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... ACK polling can be initiated immediately. This involves issuing the start condition followed by the device slave address. If the X9258 is still busy with the write operation no ACK will be returned. If the X9258 has completed the write operation an ACK will be returned and the master can then proceed with the next operation ...
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... Register Select Four instructions require a three-byte sequence to complete. These instructions transfer data between the host and the X9258; either between the host and one of the data registers or directly between the host and the Wiper Counter Register. These instructions are: Read Wiper Counter Register (read the current wiper position ...
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... X9258 Table 1. Instruction Set Instruction Read Wiper Counter 1 0 Register Write Wiper Counter 1 0 Register Read Data Register 1 0 Write Data Register 1 1 XFR Data Register Wiper Counter Regis- ter XFR Wiper Counter 1 1 Register to Data Register Global XFR Data ...
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... X9258 Figure 5. Increment/Decrement Instruction Sequence F SCL SDA Figure 6. Increment/Decrement Timing Limits INC/DEC CMD Issued SCL SDA Figure 7. Acknowledge Response from Receiver SCL from Master Data Output from Transmitter Data Output from Receiver START REV 1 ...
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... UP/DN UP/DN Modified SCL CLK The WCR is a volatile register; that is, its contents are lost when the X9258 is powered-down. Although the register is automatically loaded with the value in R0 upon power-up, it should be noted this may be different from the value present at power-down. Data Registers Each potentiometer Registers ...
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... X9258 REGISTER DESCRIPTIONS Data Registers, (8-Bit), Nonvolatile WP7 WP6 WP5 WP4 WP3 WP2 WP1 (MSB) Four 8-bit Data Registers for each DCP. (sixteen 8-bit registers in total). – {D7~D0}: These bits are for general purpose not volatile data storage or for storage four different wiper values ...
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... X9258 Write Data Register (WR) S device type device instruction S T identifier addresses XFR Data Register (DR) to Wiper Counter Register (WCR) S device type device instruction S T identifier addresses ...
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... X9258 SYMBOL TABLE WAVEFORM INPUTS Must be steady May change from Low to High May change from High to Low Don’t Care: Changes Allowed N/A REV 1.1.7 2/4/03 Guidelines for Calculating Typical Values of Bus Pull-Up Resistors OUTPUTS Will be steady Will change from Low to High Will change ...
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... Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Max. +70°C X9258-2.7 +85°C Limits Min. Typ. Max. ±7.5 150 40 X9258 +4.5 +5.5 X9258-2.7 +2.7 +5.5 X9258 -5.5 X9258 -2.7 -5 pin -120 0.6 ±0.6 ±300 TOTAL 10/10/25 www.xicor.com Device Supply Voltage (V 5V ±10% X9258 2.7V to 5.5V Unit Test Conditions ± ...
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... X9258 D.C. OPERATING CHARACTERISTICS (Over the recommended operating conditions unless otherwise specified.) Symbol Parameter I V supply current (Non- CC1 CC volatile Write supply current (move CC2 CC wiper, write, read current (standby Input leakage current LI I Output leakage current LO V Input HIGH voltage ...
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... X9258 A.C. TEST CONDITIONS I nput pulse levels V Input rise and fall times 10ns Input and output timing level V EQUIVALENT A.C. LOAD CIRCUIT 5V 1533Ω SDA Output 100pF AC TIMING (Over recommended operating condition) Symbol f Clock frequency SCL t Clock cycle time CYC t Clock high time ...
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... X9258 DCP TIMING Symbol t Wiper response time after the third (last) power supply is stable WRPO t Wiper response time after instruction issued (all load instructions) WRL t Wiper response time from an active SCL/SCK edge (increment/decrement instruction) WRID Note: (8) A device must internally provide a hold time of at least 300ns for the SDA signal in order to bridge the undefined region of the falling edge of SCL ...
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... X9258 DCP Timing (for All Load Instructions) SCL SDA VWx DCP 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 1.1.7 2/4/03 LSB t WRL Inc/Dec (START) (STOP) ... (Any Instruction) ... ...
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... X9258 APPLICATIONS INFORMATION Basic Configurations of Electronic Potentiometers V R Three terminal Potentiometer; Variable voltage divider Application Circuits Noninverting Amplifier – (1 Offset Voltage Adjustment 100KΩ – + TL072 10KΩ 10KΩ 10KΩ +12V -12V REV 1 ...
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... X9258 Application Circuits (continued) Attenuator R 1 – All -1/2 ≤ G ≤ +1/2 Inverting Amplifier – – + REV 1.1.7 2/4/ 10kΩ Function Generator frequency ∝ R ...
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... X9258 PACKAGING INFORMATION 24-Bump Chip Scale Package (CSP B24) Package Outline Drawing j Top View (Sample Marking) Package Dimensions Symbol Package Width a Package Length b Package Height c Body Thickness d Ball Height e Ball Diameter f Ball Pitch – Width j Ball Pitch – Length k Ball to Edge Spacing – Width l Ball to Edge Spacing – ...
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... X9258 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 1.1.7 2/4/03 24-Lead Plastic, TSSOP, Package Code V24 .169 (4.3) .252 (6.4) BSC .177 (4.5) .047 (1.20) .002 (.06) ...
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... X9258 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 1.1.7 2/4/03 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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... X9258 Ordering Information X9258 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. ...