X9251TB24 XICOR [Xicor Inc.], X9251TB24 Datasheet
X9251TB24
Related parts for X9251TB24
X9251TB24 Summary of contents
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PPLICATION OTES AND EVELOPMENT AN99 • AN115 • AN124 •AN133 • AN134 • AN135 Single Supply / Low Power / 256-tap / SPI bus Quad Digitally-Controlled (XDCP FEATURES ...
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... X9251TV24-2.7 100k Ω X9251TV24I 100k Ω X9251TV24I-2.7 100k Ω X9251TB24 100k Ω X9251TB24-2.7 100k Ω X9251TB24I 100k Ω X9251TB24I-2.7 REV 1.3.3 2/10/04 Operating Temperature Package Range 24-lead SOIC 0°C to 70°C 24-lead SOIC 0°C to 70°C 24-lead SOIC -40°C to +85°C 24-lead SOIC -40° ...
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X9251 CIRCUIT LEVEL APPLICATIONS • Vary the gain of a voltage amplifier • Provide programmable dc reference voltages for comparators and detectors • Control the volume in audio circuits • Trim out the offset voltage error in a voltage amplifier ...
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X9251 PIN CONFIGURATION SOIC/TSSOP X9251 ...
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X9251 PIN DESCRIPTIONS Bus Interface Pins S O (SO) ERIAL UTPUT serial data output pin. During a read cycle, data is shifted out on this pin. Data is clocked out by the falling edge of the serial ...
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X9251 PRINCIPLES OF OPERATION The X9251 is an integrated circuit incorporating four DCPs and their associated registers and counters, and a serial interface providing direct communication between a host and the potentiometers. DCP Description Each DCP is implemented with a ...
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X9251 Wiper Counter Register (WCR) The X9251 contains four Wiper Counter Registers, one for each potentiometer. The Wiper Counter Register can be envisioned as a 8-bit parallel and serial load counter with its outputs decoded to select one of 256 ...
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X9251 SERIAL INTERFACE The X9251 supports the SPI interface hardware conventions. The device is accessed via the SI input with data clocked in, on the rising SCK. CS must be LOW and the HOLD and WP pins must be HIGH ...
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X9251 Table 5. Instruction Set Instruction I3 Read Wiper Counter 1 Register Write Wiper Counter 1 Register Read Data Register 1 Write Data Register 1 XFR Data Register to 1 Wiper Counter Register XFR Wiper Counter 1 Register to Data ...
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X9251 Instructions Four of the nine instructions are three bytes in length. These instructions are: – Read Wiper Counter Register – read the current wiper position of the selected potentiometer, – Write Wiper Counter Register – change current wiper position ...
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X9251 Figure 2. Two-Byte Instruction Sequence CS SCK ID3 ID2 ID1 ID0 Device ID Figure 3. Three-Byte Instruction Sequence SPI Interface; Write Case CS SCK ID3 ID2 ID1 ID0 0 ...
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X9251 Figure 5. Three-Byte Instruction Sequence (Read Status Register) CS SCK ID3 ID2 ID1 ID0 0 0 Internal Device ID Address Figure 6. Increment/Decrement Instruction Sequence CS SCK ...
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X9251 INSTRUCTION FORMAT Read Wiper Counter Register (WCR) Device Type Device Identifier Addresses CS Falling Edge Write Wiper Counter Register (WCR) Device Type Device Identifier Addresses ...
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X9251 Global Transfer Wiper Counter Register (WCR) to Data Register (DR) Device Type Device CS Identifier Addresses Falling Edge Transfer Wiper Counter Register (WCR) ...
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X9251 ABSOLUTE MAXIMUM RATINGS Temperature under bias ....................–65°C to +135°C Storage temperature .........................–65°C to +150°C Voltage on SCK, any address input, V with respect to V .................................. –1V to +7V SS ∆ –VL) | ................................................... 5.5V H ...
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X9251 D.C. OPERATING CHARACTERISTICS Symbol Parameter I V supply current CC1 CC (active supply current CC2 CC (non-volatile write current (standby Input leakage current LI I Output leakage current LO V Input HIGH ...
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X9251 EQUIVALENT A.C. LOAD CIRCUIT V CC 2kΩ SO pin 2kΩ AC TIMING Symbol f SPI clock frequency SCK t SPI clock cycle rime CYC t SPI clock high rime WH t SPI clock low time WL t Lead time ...
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X9251 HIGH-VOLTAGE WRITE CYCLE TIMING Symbol t High-voltage write cycle time (store instructions) WR XDCP 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) ...
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X9251 TIMING DIAGRAMS Input Timing CS t LEAD SCK MSB SI High Impedance SO Output Timing CS SCK t V MSB SO ADDR SI Hold Timing CS SCK HOLD REV 1.3.3 2/10/04 ...
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X9251 XDCP Timing (for All Load Instructions) CS SCK MSB SI VWx High Impedance SO Write Protect and Device Address Pins Timing REV 1.3.3 2/10/04 ... t WRL ... (Any Instruction WPASU WPAH www.xicor.com ...
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X9251 APPLICATIONS INFORMATION Basic Configurations of Electronic Potentiometers V R Three terminal Potentiometer; Variable voltage divider Application Circuits Noninverting Amplifier – (1 Offset Voltage Adjustment R 1 ...
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X9251 Application Circuits (continued) Attenuator – -1/2 ≤ G ≤ +1/2 Inverting Amplifier – ...
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X9251 PACKAGING INFORMATION 24-Bump Chip Scale Package (CSP B24) Package Outline Drawing Top View (Marking Side) Package Width Package Length Package Height Body Thickness Ball Height Ball Diameter Ball Pitch – Width Ball Pitch – Length Ball to Edge Spacing ...
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X9251 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 1.3.3 2/10/04 24-Lead Plastic, TSSOP, ...
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X9251 PACKAGING INFORMATION Pin 1 Index (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) LIMITED WARRANTY Devices sold by Xicor, Inc. are covered by ...