X9268US24T1

... V- W0 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 XDCP is a trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005, 2006. All Rights Reserved All other trademarks mentioned are the property of their respective owners. X9268 FN8172.4 ...

... NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. ...

DETAILED FUNCTIONAL DIAGRAM SCL SDA 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 ...

PIN CONFIGURATION PIN ASSIGNMENTS Pin (SOIC) Symbol Connect 2 A0 Device Address for 2-Wire bus Connect Connect Connect 6 V+ Analog Suppy Pin (Positive System Supply ...

... Both of these supplies set the voltage limits of the potentiometer. Other Pins ONNECT No connect pins should be left open. This pins are used for Intersil manufacturing and testing purposes ARDWARE RITE The WP pin when LOW prevents nonvolatile writes to the Data Registers. and ...

PRINCIPLES OF OPERATION The X9268 is a integrated microcircuit incorporating four resistor arrays and their associated registers and counters and the serial interface logic providing direct communication between the host and the digitally controlled potentiometers. This section provides detail description ...

SERIAL INTERFACE DESCRIPTION Serial Interface The X9268 supports a bidirectional bus oriented protocol. The protocol defines any device that sends data onto the bus as a transmitter and the receiving device as the receiver. The device controlling the transfer is ...

Acknowledge Polling The disabling of the inputs, during the internal nonvolatile write operation, can be used to take advantage of the typical 5ms nonvolatile write cycle time. Once the stop condition is issued to indicate the end of the nonvolatile ...

Table 1. Identification Byte Format Device Type Identifier ID3 ID2 ID1 (MSB) Table 2. Instruction Byte Format Instruction Opcode (MSB) Table 3. Instruction Set Instruction I3 Read Wiper Counter 1 Register Write Wiper Counter ...

DEVICE DESCRIPTION Wiper Counter Register (WCR) The X9268 contains two Wiper Counter Registers, one for each 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 ...

DEVICE DESCRIPTION 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 ...

Figure 3. Two-Byte Instruction Sequence SCL SDA ID3 ID2 ID1 ID0 Device ID T Figure 4. Three-Byte Instruction Sequence SCL SDA ID3 ID2 ID1 ID0 ...

INSTRUCTION FORMAT Read Wiper Counter Register (WCR) Device Type Device S Identifier Addresses Write Wiper Counter Register (WCR) Device Type Device S Identifier Addresses ...

Global XFR Wiper Counter Register (WCR) to Data Register (DR) S Device Type Device T Identifier Addresses Transfer Wiper Counter Register (WCR) to Data Register (DR) S Device Type ...

ABSOLUTE MAXIMUM RATINGS Temperature under bias .................... -65°C to +135°C Storage temperature ......................... -65°C to +150°C Voltage on SDA, SCL or any address input with respect to V ................................. -1V to +7V SS Voltage on V+ (referenced ...

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 voltage ...

EQUIVALENT A.C. LOAD CIRCUIT 5V 1533Ω SDA pin 100pF 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 ...

TIMING DIAGRAMS Start and Stop Timing (START) SCL t SU:STA SDA Input Timing t CYC SCL SDA Output Timing SCL SDA 18 X9268 HD:STA SU:DAT t AA (STOP) t SU:STO t F ...

XDCP Timing (for All Load Instructions) SCL SDA VWx Write Protect and Device Address Pins Timing SCL SDA WP A0 X9268 LSB t WRL (START) (STOP) ... (Any Instruction) ... ... t t SU:WPA HD:WPA (STOP) FN8172.4 August ...

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 ...

Application Circuits (continued) Attenuator – -1/2 ≤ G ≤ +1/2 Inverting Amplifier ...

... Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use ...