CAT5241 Quad Digitally Programmable Potentiometer (DPP™) with 64 Taps and I²C Interface FEATURES DESCRIPTION Four linear-taper digitally programmable potentiometers 64 resistor taps per potentiometer End to end resistance 2.5kΩ, 10kΩ, 50kΩ or 100kΩ Potentiometer control and memory access via I²C interface Low wiper resistance, typically 80Ω Nonvolatile memory storage for up to four wiper settings for each potentiometer Automatic recall of saved wiper settings at power up 2.5 to 6.0 volt operation Standby current less than 1µA 1,000,000 nonvolatile WRITE cycles 100 year nonvolatile memory data retention 20-lead SOIC and TSSOP packages Industrial temperature range The CAT5241 is four Digitally Programmable Potentiometers (DPPs™) integrated with control logic and 16 bytes of NVRAM memory. Each DPP consists of a series of 63 resistive elements connected between two externally accessible end points. The tap points between each resistive element are connected to the wiper outputs with CMOS switches. A separate 6-bit control register (WCR) independently controls the wiper tap switches for each DPP. Associated with each wiper control register are four 6-bit non-volatile memory data registers (DR) used for storing up to four wiper settings. Writing to the wiper control register or any of the non-volatile data registers is via a I²C serial bus. On power-up, the contents of the first data register (DR0) for each of the four potentiometers is automatically loaded into its respective wiper control register (WCR). The CAT5241 can be used as a potentiometer or as a two terminal, variable resistor. It is intended for circuit level or system level adjustments in a wide variety of applications. For Ordering Information details, see page 15. FUNCTIONAL DIAGRAM PIN CONFIGURATION SOIC 20 Lead (W) TSSOP 20 Lead (Y) RW0 1 20 VCC RL0 2 19 RW3 RH0 3 18 RL3 A0 4 17 RH3 A2 A1 RW1 5 CAT 16 6 5241 15 RL1 7 14 SCL A3 RH1 8 13 RW2 SDA 9 12 RL2 GND 10 11 RH2 © 2008 SCILLC. All rights reserved. Characteristics subject to change without notice RH0 SCL SDA I2C BUS INTERFACE RH1 RH2 RH3 WIPER CONTROL REGISTERS RW0 RW1 RW2 A0 A1 A2 A3 CONTROL LOGIC NONVOLATILE DATA REGISTERS RW3 RL0 1 RL1 RL2 RL3 Doc. No. MD-2011 Rev. Q CAT5241 PIN DESCRIPTION Pin (SOIC) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Name RW0 RL0 RH0 A0 A2 RW1 RL1 RH1 SDA GND RH2 RL2 RW2 SCL A3 A1 RH3 RL3 RW3 VCC Function Wiper Terminal for Potentiometer 0 Low Reference Terminal for Potentiometer 0 High Reference Terminal for Potentiometer 0 Device Address, LSB Device Address Wiper Terminal for Potentiometer 1 Low Reference Terminal for Potentiometer 1 High Reference Terminal for Potentiometer 1 Serial Data Input/Output Ground High Reference Terminal for Potentiometer 2 Low Reference Terminal for Potentiometer 2 Wiper Terminal for Potentiometer 2 Bus Serial Clock Device Address Device Address High Reference Terminal for Potentiometer 3 Low Reference Terminal for Potentiometer 3 Wiper Terminal for Potentiometer 3 Supply Voltage PIN DESCRIPTION DEVICE OPERATION SCL: Serial Clock The CAT5241 serial clock input pin is used to clock all data transfers into or out of the device. The CAT5241 is four resistor arrays integrated with I²C serial interface logic, four 6-bit wiper control registers and sixteen 6-bit, non-volatile memory data registers. Each resistor array contains 63 separate resistive elements connected in series. The physical ends of each array are equivalent to the fixed terminals of a mechanical potentiometer (RH and RL). RH and RL are symmetrical and may be interchanged. The tap positions between and at the ends of the series resis– tors are connected to the output wiper terminals (RW) by a CMOS transistor switch. Only one tap point for each potentiometer is connected to its wiper terminal at a time and is determined by the value of the wiper control register. Data can be read or written to the wiper control registers or the non-volatile memory data registers via the I²C bus. Additional instructions allow data to be transferred between the wiper control registers and each respective potentiometer's non-volatile data registers. Also, the device can be instructed to operate in an "increment/decrement" mode. SDA: Serial Data The CAT5241 bidirectional serial data pin is used to transfer data into and out of the device. The SDA pin is an open drain output and can be wire-or'd with the other open drain or open collector outputs. A0, A1, A2, A3: Device Address Inputs These inputs set the device address when addressing multiple devices. A total of sixteen devices can be addressed on a single bus. A match in the slave address must be made with the address input in order to initiate communication with the CAT5241. RH, RL: Resistor End Points The four sets of RH and RL pins are equivalent to the terminal connections on a mechanical potentiometer. RW: Wiper The four RW pins are equivalent to the wiper terminal of a mechanical potentiometer. Doc. No. MD-2011 Rev. Q 2 © 2008 SCILLC. All rights reserved. Characteristics subject to change without notice CAT5241 ABSOLUTE MAXIMUM RATINGS(1) Parameter Temperature Under Bias Storage Temperature Voltage on any Pin with Respect to VSS(2)(3) VCC with Respect to Ground Package Power Dissipation Capability (TA = 25°C) Lead Soldering Temperature (10s) Wiper Current Ratings -55 to +125 -65 to +150 Units °C °C -2.0 to +VCC +2.0 V -2.0 to +7.0 1.0 300 ±12 V W °C mA Ratings -40 to +85 Units °C Recommended Operating Conditions Vcc = +2.5V to +6V Parameter Operating Ambient Temperature (Industrial) POTENTIOMETER CHARACTERISTICS Over recommended operating conditions unless otherwise stated. Symbol Parameter RPOT RPOT RPOT RPOT IW RW RW VTERM VN TCRPOT TCRATIO CH/CL/CW fc Potentiometer Resistance (-00) Potentiometer Resistance (-50) Potentiometer Resistance (-10) Potentiometer Resistance (-25) Potentiometer Resistance Tolerance RPOT Matching Power Rating Wiper Current Wiper Resistance Wiper Resistance Voltage on any RH or RL Pin Noise Resolution Absolute Linearity (5) Relative Linearity (6) Temperature Coefficient of RPOT Ratiometric Temp. Coefficient Potentiometer Capacitances Frequency Response Test Conditions Min Typ Max 100 50 10 2.5 25°C, each pot IW = ±3mA @ VCC =3V IW = ±3mA @ VCC = 5V VSS = 0V (4) RW(n)(actual) - R(n)(expected)(8) RW(n+1) - [RW(n)+LSB](8) (4) (4) (4) RPOT = 50kΩ (4) 80 GND ±20 1 50 ±6 300 150 VCC TBD 1.6 ±1 ±0.2 ±300 20 10/10/25 0.4 Units kΩ kΩ kΩ kΩ % % mW mA Ω Ω nV/√Hz % LSB(7) LSB(7) ppm/°C ppm/°C pF MHz Notes: (1) Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions outside of those listed in the operational sections of this specification is not implied. Exposure to any absolute maximum rating for extended periods may affect device performance and reliability. (2) The minimum DC input voltage is –0.5V. During transitions, inputs may undershoot to –2.0V for periods of less than 20ns. Maximum DC voltage on output pins is VCC +0.5V, which may overshoot to VCC +2.0V for periods of less than 20ns. (3) Latch-up protection is provided for stresses up to 100mA on address and data pins from –1V to VCC + 1V. (4) This parameter is tested initially and after a design or process change that affects the parameter. (5) Absolute linearity is utilized to determine actual wiper voltage versus expected voltage as determined by wiper position when used as a potentiometer. (6) Relative linearity is utilized to determine the actual change in voltage between two successive tap positions when used as a potentiometer. It is a measure of the error in step size. (7) LSB = RTOT / 63 or (RH - RL) / 63, single pot (8) n = 0, 1, 2, ..., 63 © 2008 SCILLC. All rights reserved. Characteristics subject to change without notice 3 Doc. No. MD-2011 Rev. Q CAT5241 D.C. OPERATING CHARACTERISTICS Over recommended operating conditions unless otherwise stated. Symbol Parameter Test Conditions Min Typ Max Units fSCL = 400kHz 1 mA VIN = GND or VCC; SDA = GND; RWX = GND (2) 1 µA VIN = GND to VCC 10 µA VOUT = GND to VCC 10 µA ICC Power Supply Current ISB Standby Current (VCC = 5.0V) ILI Input Leakage Current ILO Output Leakage Current VIL Input Low Voltage -1 VCC x 0.3 V VIH Input High Voltage VCC x 0.7 VCC + 1.0 V VOL1 Output Low Voltage (VCC = 3.0V) 0.4 V Max Units IOL = 3 mA CAPACITANCE TA = 25°C, f = 1.0MHz, VCC = 5V Symbol Parameter CI/O(1) CIN(1) Test Conditions Min Typ Input/Output Capacitance (SDA) VI/O = 0V 8 pF Input Capacitance (A0, A1, A2, A3, SCL) VIN = 0V 6 pF A.C. CHARACTERISTICS Over recommended operating conditions unless otherwise stated. Symbol fSCL (1) TI tAA tBUF (1) Parameter Min Typ Max Units Clock Frequency 400 kHz Noise Suppression Time Constant at SCL, SDA Inputs 50 ns SLC Low to SDA Data Out and ACK Out 0.9 µs Time the Bus Must Be Free Before a New Transmission Can Start 1.2 µs Start Condition Hold Time 0.6 µs tLOW Clock Low Period 1.2 µs tHIGH Clock High Period 0.6 µs tSU:STA Start Condition Setup Time (For a Repeated Start Condition) 0.6 µs tHD:DAT Data in Hold Time 0 ns tSU:DAT Data in Setup Time 100 ns tHD:STA (1) SDA and SCL Rise Time 0.3 µs (1) SDA and SCL Fall Time 300 ns tR tF tSU:STO tDH Stop Condition Setup Time 0.6 µs Data Out Hold Time 50 ns POWER UP TIMING (1) Over recommended operating conditions unless otherwise stated. Symbol Parameter tPUR tPUW Min Typ Max Units Power-up to Read Operation 1 ms Power-up to Write Operation 1 ms Note: (1) This parameter is tested initially and after a design or process change that affects the parameter. (2) All four wiper terminals RW0, RW1, RW2, and RW3 are tied to ground. Doc. No. MD-2011 Rev. Q 4 © 2008 SCILLC. All rights reserved. Characteristics subject to change without notice CAT5241 WRITE CYCLE LIMITS Over recommended operating conditions unless otherwise stated. Symbol Parameter tWR Min Typ Max Units 5 ms Write Cycle Time The write cycle is the time from a valid stop condition of a write sequence to the end of the internal program/erase cycle. During the write cycle, the bus interface circuits are disabled, SDA is allowed to remain high, and the device does not respond to its slave address. RELIABILITY CHARACTERISTICS Over recommended operating conditions unless otherwise stated. Symbol NEND (1) TDR(1) VZAP(1) ILTH(1)(2) Parameter Reference Test Method Min Typ Max Units Endurance MIL-STD-883, Test Method 1033 1,000,000 Cycles/Byte Data Retention MIL-STD-883, Test Method 1008 100 Years ESD Susceptibility MIL-STD-883, Test Method 3015 2000 Volts Latch-Up JEDEC Standard 17 100 mA Note: (1) This parameter is tested initially and after a design or process change that affects the parameter. (2) tPUR and tPUW are the delays required from the time VCC is stable until the specified operation can be initiated. Figure 1. Bus Timing tF tHIGH tLOW tR tLOW SCL tSU:STA tHD:STA tHD:DAT tSU:DAT tSU:STO SDA IN tAA tBUF tDH SDA OUT Figure 2. Write Cycle Timing SCL 8TH BIT BYTE n SDA ACK tWR STOP CONDITION START CONDITION ADDRESS Figure 3. Start/Stop Timing SDA SCL START BIT © 2008 SCILLC. All rights reserved. Characteristics subject to change without notice STOP BIT 5 Doc. No. MD-2011 Rev. Q CAT5241 of the particular slave device it is requesting. The four most significant bits of the 8-bit slave address are fixed as 0101 for the CAT5241 (see Figure 5). The next four significant bits (A3, A2, A1, A0) are the device address bits and define which device the Master is accessing. Up to sixteen devices may be individually addressed by the system. Typically, +5V and ground are hard-wired to these pins to establish the device's address. SERIAL BUS PROTOCOL The following defines the features of the I²C bus protocol: (1) Data transfer may be initiated only when the bus is not busy. (2) During a data transfer, the data line must remain stable whenever the clock line is high. Any changes in the data line while the clock is high will be interpreted as a START or STOP condition. After the Master sends a START condition and the slave address byte, the CAT5241 monitors the bus and responds with an acknowledge (on the SDA line) when its address matches the transmitted slave address. The device controlling the transfer is a master, typically a processor or controller, and the device being controlled is the slave. The master will always initiate data transfers and provide the clock for both transmit and receive operations. Therefore, the CAT5241 will be considered a slave device in all applications. Acknowledge After a successful data transfer, each receiving device is required to generate an acknowledge. The Acknowledging device pulls down the SDA line during the ninth clock cycle, signaling that it received the 8 bits of data. START Condition The START Condition precedes all commands to the device, and is defined as a HIGH to LOW transition of SDA when SCL is HIGH. The CAT5241 monitors the SDA and SCL lines and will not respond until this condition is met. The CAT5241 responds with an acknowledge after receiving a START condition and its slave address. If the device has been selected along with a write operation, it responds with an acknowledge after receiving each 8-bit byte. STOP Condition A LOW to HIGH transition of SDA when SCL is HIGH determines the STOP condition. All operations must end with a STOP condition. When the CAT5241 is in a READ mode it transmits 8 bits of data, releases the SDA line, and monitors the line for an acknowledge. Once it receives this acknowledge, the CAT5241 will continue to transmit data. If no acknowledge is sent by the Master, the device terminates data transmission and waits for a STOP condition. DEVICE ADDRESSING The bus Master begins a transmission by sending a START condition. The Master then sends the address Figure 4. Acknowledge Timing SCL FROM MASTER 1 8 9 DATA OUTPUT FROM TRANSMITTER DATA OUTPUT FROM RECEIVER ACKNOWLEDGE START Doc. No. MD-2011 Rev. Q 6 © 2008 SCILLC. All rights reserved. Characteristics subject to change without notice CAT5241 Acknowledge Polling The disabling of the inputs can be used to take advantage of the typical write cycle time. Once the stop condition is issued to indicate the end of the host's write operation, the CAT5241 initiates the internal write cycle. ACK polling can be initiated immediately. This involves issuing the start condition followed by the slave address. If the CAT5241 is still busy with the write operation, no ACK will be returned. If the CAT5241 has completed the write operation, an ACK will be returned and the host can then proceed with the next instruction operation. WRITE OPERATION In the Write mode, the Master device sends the START condition and the slave address information to the Slave device. After the Slave generates an acknowledge, the Master sends the instruction byte that defines the requested operation of CAT5241. The instruction byte consist of a four-bit opcode followed by two register selection bits and two pot selection bits. After receiving another acknowledge from the Slave, the Master device transmits the data to be written into the selected register. The CAT5241 acknowledges once more and the Master generates the STOP condition, at which time if a non-volatile data register is being selected, the device begins an internal programming cycle to non-volatile memory. While this internal cycle is in progress, the device will not respond to any request from the Master device. Figure 5. Slave Address Bits CAT5241 * 0 1 0 1 A3 A2 A1 A0 A0, A1, A2 and A3 correspond to pin A0, A1, A2 and A3 of the device. ** A0, A1, A2 and A3 must compare to its corresponding hard wired input pins. Figure 6. Write Timing BUS ACTIVITY: MASTER SDA LINE S T A R T INSTRUCTION BYTE SLAVE/DPP ADDRESS Fixed Variable op code DR WCR DATA P S A C K A C K © 2008 SCILLC. All rights reserved. Characteristics subject to change without notice Pot/WCR Data Register Address Address S T O P 7 A C K Doc. No. MD-2011 Rev. Q CAT5241 INSTRUCTIONS AND REGISTER DESCRIPTION INSTRUCTION BYTE The next byte sent to the CAT5241 contains the instruction and register pointer information. The four most significant bits used provide the instruction opcode I [3:0]. The P1 and P0 bits point to one of four Wiper Control Registers. The least two significant bits, R1 and R0, point to one of the four data registers of each associated potentiometer. The format is shown in Table 2. SLAVE ADDRESS BYTE The first byte sent to the CAT5241 from the master/processor is called the Slave/DPP Address Byte. The most significant four bits of the slave address are a device type identifier. These bits for the CAT5241 are fixed at 0101[B] (refer to Table 1). The next four bits, A3 - A0, are the internal slave address and must match the physical device address which is defined by the state of the A3 - A0 input pins for the CAT5241 to successfully continue the command sequence. Only the device which slave address matches the incoming device address sent by the master executes the instruction. The A3 - A0 inputs can be actively driven by CMOS input signals or tied to VCC or VSS. Data Register Selection Data Register Selected R1 R0 DR0 0 0 DR1 0 1 DR2 1 0 DR3 1 1 Table 1. Identification Byte Format Device Type Identifier Slave Address ID3 ID2 ID1 ID0 0 1 0 1 A3 A2 A1 A0 (MSB) (LSB) Table 2. Instruction Byte Format Instruction Opcode I3 (MSB) Doc. No. MD-2011 Rev. Q I2 WCR/Pot Selection I1 P1 I0 8 P0 Data Register Selection R1 R0 (LSB) © 2008 SCILLC. All rights reserved. Characteristics subject to change without notice CAT5241 four Data Registers and the associated Wiper Control Register. Any data changes in one of the Data Regis– ters is a non-volatile operation and will take a maximum of 5ms. WIPER CONTROL AND DATA REGISTERS Wiper Control Register (WCR) The CAT5241 contains four 6-bit Wiper Control Registers, one for each potentiometer. The Wiper Control Register output is decoded to select one of 64 switches along its resistor array. The contents of the WCR can be altered in four ways: it may be written by the host via Write Wiper Control Register instruction; it may be written by transferring the contents of one of four associated Data Registers via the XFR Data Register instruction, it can be modified one step at a time by the Increment/decrement instruction (see Instruction section for more details). Finally, it is loaded with the content of its data register zero (DR0) upon power-up. If the application does not require storage of multiple settings for the potentiometer, the Data Registers can be used as standard memory locations for system parameters or user preference data. INSTRUCTIONS Four of the nine instructions are three bytes in length. These instructions are: — Read Wiper Control Register – read the current wiper position of the selected potentiometer in the WCR The Wiper Control Register is a volatile register that loses its contents when the CAT5241 is powereddown. Although the register is automatically loaded with the value in DR0 upon power-up, this may be different from the value present at power-down. — Write Wiper Control Register – change current wiper position in the WCR of the selected potentiometer Data Registers (DR) Each potentiometer has four 6-bit non-volatile Data Registers. These can be read or written directly by the host. Data can also be transferred between any of the — Write Data Register – write a new value to the selected Data Register — Read Data Register – read the contents of the selected Data Register The basic sequence of the three byte instructions is illustrated in Figure 8. These three-byte instructions Table 3. Instruction Set Instruction Set I3 I2 I1 I0 WCR1 / P1 WCR0 / P0 R1 R0 1 0 0 1 1/0 1/0 0 0 1 0 1 0 1/0 1/0 0 0 Read Data Register 1 0 1 1 1/0 1/0 1/0 1/0 Write Data Register 1 1 0 0 1/0 1/0 1/0 1/0 XFR Data Register to Wiper Control Register 1 1 0 1 1/0 1/0 1/0 1/0 XFR Wiper Control Register to Data Register 1 1 1 0 1/0 1/0 1/0 1/0 Global XFR Data Registers to Wiper Control Registers 0 0 0 1 0 0 1/0 1/0 Global XFR Wiper Control Registers to Data Register 1 0 0 0 0 0 1/0 1/0 Increment/Decrement Wiper Control Register 0 0 1 0 1/0 1/0 0 0 Instruction Read Wiper Control Register Write Wiper Control Register Operations Read the contents of the Wiper Control Register pointed to by P1-P0 Write new value to the Wiper Control Register pointed to by P1-P0 Read the contents of the Data Register pointed to by P1-P0 and R1-R0 Write new value to the Data Register pointed to by P1-P0 and R1-R0 Transfer the contents of the Data Register pointed to by P1-P0 and R1-R0 to its associated Wiper Control Register Transfer the contents of the Wiper Control Register pointed to by P1-P0 to the Data Register pointed to by R1-R0 Transfer the contents of the Data Registers pointed to by R1-R0 of all four pots to their respective Wiper Control Registers Transfer the contents of both Wiper Control Registers to their respective data Registers pointed to by R1-R0 of all four pots Enable Increment/decrement of the Control Latch pointed to by P1-P0 Note: 1/0 = data is one or zero © 2008 SCILLC. All rights reserved. Characteristics subject to change without notice 9 Doc. No. MD-2011 Rev. Q CAT5241 exchange data between the WCR and one of the Data Registers. The WCR controls the position of the wiper. The response of the wiper to this action will be delayed by tWRL. A transfer from the WCR (current wiper position), to a Data Register is a write to nonvolatile memory and takes a maximum of tWR to complete. The transfer can occur between one of the four potentiometers and one of its associated registers; or the transfer can occur between all potentiometers and one associated register. — Global XFR Data Register to Wiper Control Register This transfers the contents of all specified Data Registers to the associated Wiper Control Registers. Four instructions require a two-byte sequence to complete, as illustrated in Figure 7. These instructions transfer data between the host/processor and the CAT5241; either between the host and one of the data registers or directly between the host and the Wiper Control Register. These instructions are: INCREMENT/DECREMENT COMMAND The final command is Increment/Decrement (Figure 5 and 9). The Increment/Decrement command is different from the other commands. Once the command is issued and the CAT5241 has responded with an acknowledge, the master can clock the selected wiper up and/or down in one segment steps; thereby providing a fine tuning capability to the host. For each SCL clock pulse (tHIGH) while SDA is HIGH, the selected wiper will move one resistor segment towards the RH terminal. Similarly, for each SCL clock pulse while SDA is LOW, the selected wiper will move one resistor segment towards the RL terminal. — Global XFR Wiper Counter Register to Data Register This transfers the contents of all Wiper Control Registers to the specified associated Data Registers. — XFR Data Register to Wiper Control Register This transfers the contents of one specified Data Register to the associated Wiper Control Register. — XFR Wiper Control Register to Data Register This transfers the contents of the specified Wiper Control Register to the specified associated Data Register. See Instructions format for more detail. Figure 7. Two-Byte Instruction Sequence SDA 0 1 0 1 S ID3 ID2 ID1 ID0 A3 T A R Device ID T A2 A1 A0 Internal Address A C K I3 I2 I1 Instruction Opcode I0 P1 P0 R1 R0 Pot/WCR Register Address Address A C K S T O P Figure 8. Three-Byte Instruction Sequence SDA 0 1 0 1 S ID3 ID2 ID1 ID0 A3 T A Device ID R T A2 I2 I1 I0 P1 P0 R1 R0 A A0 A I3 C C K K Internal Instruction Pot/WCR Data Address Opcode Address Register Address A1 D7 D6 D5 D4 D3 D2 D1 D0 WCR[7:0] or Data Register D[7:0] A C K S T O P Figure 9. Increment/Decrement Instruction Sequence 0 SDA S T A R T 1 0 1 ID3 ID2 ID1 ID0 Doc. No. MD-2011 Rev. Q Device ID A3 A2 A1 A0 Internal Address A C K I3 I2 I1 Instruction Opcode 10 I0 P1 P0 R1 R0 Pot/WCR Data Address Register Address A C K I N C 1 I N C 2 I N C n D E C 1 D E C n S T O P © Catalyst Semiconductor, Inc. Characteristics subject to change without notice CAT5241 Figure 10. Increment/Decrement Timing Limits INC/DEC Command Issued tWRID SCL SDA Voltage Out RW INSTRUCTION FORMAT Read Wiper Control Register (WCR) S T A R T DEVICE ADDRESSES 0 1 0 1 A3 A2 A1 A0 A C K INSTRUCTION 1 0 0 1 P1 P0 0 0 A C K DATA S T O P DATA S T O P A 7 6 5 4 3 2 1 0 C K Write Wiper Control Register (WCR) S T A R T DEVICE ADDRESSES 0 1 0 1 A3 A2 A1 A0 INSTRUCTION A C K 1 0 1 0 P1 P0 0 0 A C K 1 0 1 1 P1 P0 R1 R0 A C K A 7 6 5 4 3 2 1 0 C K Read Data Register (DR) S T A R T DEVICE ADDRESSES 0 1 0 1 A3 A2 A1 A0 INSTRUCTION A C K DATA A S 7 6 5 4 3 2 1 0 C T K O P Write Data Register (DR) S T A R T DEVICE ADDRESSES 0 1 0 1 A3 A2 A1 A0 © 2008 SCILLC. All rights reserved. Characteristics subject to change without notice A C K INSTRUCTION 1 1 0 0 P1 P0 R1 R0 11 A C K DATA A S 7 6 5 4 3 2 1 0 C T K O P Doc. No. MD-2011 Rev. Q CAT5241 Global Transfer Data Register (DR) to Wiper Control Register (WCR) S T A R T DEVICE ADDRESSES 0 1 0 1 A3 A2 A1 A0 A C K INSTRUCTION A 0 0 0 1 0 0 R1 R0 C K S T O P Global Transfer Wiper Control Register (WCR) to Data Register (DR) S T A R T DEVICE ADDRESSES 0 1 0 1 A3 A2 A1 A0 A C K INSTRUCTION A 1 0 0 0 0 0 R1 R0 C K S T O P Transfer Wiper Control Register (WCR) to Data Register (DR) S T A R T DEVICE ADDRESSES A 0 1 0 1 A3 A2 A1 A0 C K INSTRUCTION A S 1 1 1 0 P1 P0 R1 R0 C T K O P Transfer Data Register (DR) to Wiper Control Register (WCR) S T A R T DEVICE ADDRESSES A 0 1 0 1 A3 A2 A1 A0 C K INSTRUCTION A S 1 1 0 1 P1 P0 R1 R0 C T K O P Increment (I)/Decrement (D) Wiper Control Register (WCR) S T A R T DEVICE ADDRESSES A 0 1 0 1 A3 A2 A1 A0 C K INSTRUCTION 0 0 1 0 P1 P0 0 0 A C I/D I/D K DATA ... S I/D I/D T O P Notes: (1) Any write or transfer to the Non-volatile Data Registers is followed by a high voltage cycle after a STOP has been issued. Doc. No. MD-2011 Rev. Q 12 © 2008 SCILLC. All rights reserved. Characteristics subject to change without notice CAT5241 PACKAGE OUTLINE DRAWINGS SOIC 20-Lead 300 mils (W) (1)(2) SYMBOL E1 E MIN NOM MAX 2.49 2.64 A 2.36 A1 0.10 A2 2.05 b 0.31 0.41 0.51 c 0.20 0.27 0.33 e PIN#1 IDENTIFICATION 2.55 D 12.60 12.80 13.00 E 10.01 10.30 10.64 E1 7.40 7.50 7.60 e b 0.30 1.27 BSC h 0.25 L 0.40 0.75 θ 0° 8° θ1 5° 15° 0.81 1.27 TOP VIEW D h θ1 θ A2 A h θ1 L A1 SIDE VIEW c END VIEW For current Tape and Reel information, download the PDF file from: http://www.catsemi.com/documents/tapeandreel.pdf. Notes: (1) All dimensions are in millimeters. Angles in degree. (2) Complies with JEDEC standard MS-013. © 2008 SCILLC. All rights reserved. Characteristics subject to change without notice 13 Doc. No. MD-2011 Rev. Q CAT5241 TSSOP 20-Lead 4.4mm (Y) (1)(2) b SYMBOL MIN NOM A A1 E1 E MAX 1.20 0.05 0.15 A2 0.80 1.05 b 0.19 0.30 c 0.09 D 6.40 6.50 6.60 E 6.30 6.40 6.50 E1 4.30 4.40 4.50 e L 0.65 BSC 0.45 L1 θ1 0.20 0.60 0.75 1.00 REF 0° 8° e TOP VIEW D c A2 A θ1 L A1 L1 SIDE VIEW END VIEW For current Tape and Reel information, download the PDF file from: http://www.catsemi.com/documents/tapeandreel.pdf. Notes: (1) All dimensions are in millimeters. Angles in degree. (2) Complies with JEDEC standard M0-153. Doc. No. MD-2011 Rev. Q 14 © 2008 SCILLC. All rights reserved. Characteristics subject to change without notice CAT5241 EXAMPLE OF ORDERING INFORMATION (1) Prefix Device # CAT 5241 Company ID Suffix W Package W: SOIC Y: TSSOP I Temperature Range I = Industrial (-40ºC to 85ºC) -10 Resistance -25: 2.5kΩ -10: 10kΩ -50: 50kΩ -00: 100kΩ - T1 Tape & Reel T: Tape & Reel 1: 1,000/Reel – SOIC 2: 2,000/Reel – TSSOP Product Number 5241 ORDERING PART NUMBER Part Number Resistance CAT5241WI-25 2.5kΩ CAT5241WI-10 10kΩ CAT5241WI-50 50kΩ CAT5241WI-00 100kΩ CAT5241YI-25 2.5kΩ CAT5241YI-10 10kΩ CAT5241YI-50 50kΩ CAT5241YI-00 100kΩ Package SOIC TSSOP Notes: (1) All packages are RoHS-compliant (Lead-free, Halogen-free). (2) The standard lead finish is Matte-Tin. (3) This device used in the above example is a CAT5241WI-10-T1 (SOIC, Industrial Temperature, 10kΩ, Tape & Reel, 1,000/Reel). (4) For additional package and temperature options, please contact your nearest ON Semiconductor Sales office. © 2008 SCILLC. All rights reserved. Characteristics subject to change without notice 15 Doc. No. MD-2011 Rev. Q CAT5241 REVISION HISTORY Date 30-Sep-03 Revision G Description Deleted WP from Functional Diagram, pg. 1 03-Mar-04 H Added TSSOP package in all areas 29-Mar-04 I Eliminated data sheet designation Eliminated Commercial temperature range in all areas Updated Absolute Max Ratings and Potentiometer Characteristics notes 05-Apr-04 J Corrected Potentiometer Resistance [Changed (-2.5) to (-25)] in table 22-Apr-06 K Updated Example of Ordering Information 24-May-07 L Updated 20-Lead TSSOP Package Drawing Updated Example of Ordering Information Update Copyrights, Trademarks and Patents Added MD- in front of Document No. 20-Jun-07 M Update Pin Description Update D.C Operating Characteristics: Standby Current Test Conditions 02-Apr-08 N Update Package Outline Drawings 08-Apr-08 O Change 2-wire with I²C Update Example of Ordering Information Update Ordering Part Number table 25-Aug-08 P Update Figures 7, 8 and 9 01-Dec-08 Q Change logo and fine print to ON Semiconductor ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). 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