X9271TB XICOR [Xicor Inc.], X9271TB Datasheet
X9271TB
Related parts for X9271TB
X9271TB 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 Single Digitally-Controlled (XDCP FEATURES ...
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X9271 DETAILED FUNCTIONAL DIAGRAM V CC HOLD CS SCK INTERFACE SO AND CONTROL SI CIRCUITRY CIRCUIT LEVEL APPLICATIONS • Vary the gain of a voltage amplifier • Provide programmable dc reference voltages for comparators and detectors ...
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X9271 PIN CONFIGURATION SCK PIN ASSIGNMENTS TSSOP CSP B2, C2 ...
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X9271 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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X9271 PRINCIPLES OF OPERATION Device Description S I ERIAL NTERFACE The X9271 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 ...
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X9271 DEVICE DESCRIPTION Wiper Counter Register (WCR) The X9271 contains a Wiper Counter Register for the DCP potentiometer. The Wiper Counter Register can be envisioned as a 8-bit parallel and serial load counter with its outputs decoded to select one ...
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X9271 DEVICE DESCRIPTION Instructions I B (ID A) DENTIFICATION YTE AND The first byte sent to the X9271 from the host, following a CS going HIGH to LOW, is called the Identification byte. The most significant four bits of the ...
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X9271 Table 5. Instruction Byte Format Instruction Opcode (MSB) DEVICE DESCRIPTION Instructions Five of the eight instructions are three bytes in length. These instructions are: – Read Wiper Counter Register – read the current wiper position of ...
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X9271 Figure 2. Two-Byte Instruction Sequence CS SCK ID3 ID2 ID1 ID0 Device ID Figure 3. Three-Byte Instruction Sequence (Write) CS SCL ID3 ID2 ID1 ID0 ...
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X9271 Figure 5. Increment/Decrement Instruction Sequence CS SCL ID3 ID2 ID1 ID0 0 0 Device ID Figure 6. Increment/Decrement Timing Limits SCK INC/DEC CMD ISSUED Table 6. Instruction Set Instruction ...
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X9271 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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X9271 Transfer Data Register (DR) to Wiper Counter Register (WCR) Device Type Device CS Identifier Addresses Falling Edge Increment/Decrement Wiper Counter Register (WCR) Device Type Device CS Identifier Addresses Falling Edge 0 1 ...
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X9271 ABSOLUTE MAXIMUM RATINGS Temperature under bias ....................–65°C to +135°C Storage temperature .........................–65°C to +150°C Voltage on SCK any address input with respect to V ..................................–1V to +7V SS ∆V = |(V –V )|...................................................... 5. Lead temperature (soldering, ...
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X9271 D.C. OPERATING CHARACTERISTICS Symbol Parameter I V supply current CC1 CC (active supply current CC2 CC (nonvolatile write current (standby Input leakage current LI I Output leakage current LO V Input HIGH ...
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X9271 EQUIVALENT A.C. LOAD CIRCUIT 5V 1462Ω SO pin 2714Ω 100pF AC TIMING Symbol f SSI/SPI clock frequency SCK t SSI/SPI clock cycle time CYC t SSI/SPI clock high time WH t SSI/SPI clock low time WL t Lead time ...
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X9271 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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X9271 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 1.1.7 2/6/03 ...
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X9271 XDCP Timing (for All Load Instructions) CS SCK MSB SI VWx High Impedance SO Write Protect and Device Address Pins Timing REV 1.1.7 2/6/03 ... t WRL ... (Any Instruction WPASU WPAH www.xicor.com ...
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X9271 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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X9271 Application Circuits (continued) Attenuator – -1/2 ≤ G ≤ +1/2 Inverting Amplifier – ...
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X9271 PACKAGING INFORMATION See Detail “A” NOTE: ALL DIMENSIONS IN INCHES (IN P ARENTHESES IN MILLIMETERS) REV 1.1.7 2/6/03 14-LEAD PLASTIC, TSSOP, PACKAGE TYPE V .025 (.65) BSC .193 (4.9) .200 (5.1) .0075 (.19) .002 (.05) .0118 (.30) .006 (.15) ...
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X9271 16-Bump Chip Scale Package (CSP B16) Package Outline Drawing j m Top View (Marking Side) Package Dimensions Symbol Package Width a Package Length b Package Height c Body Thickness d Ball Height e Ball Diameter f Ball Pitch – ...
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X9271 ORDERING INFORMATION X9271 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 ...