DEMO MANUAL DC1880A LTC2874 Quad IO-Link Master Hot Swap Controller and PHY Description Demonstration circuit 1880A showcases the LTC®2874, a quad Hot Swap™ controller and PHY suitable for IO-Link® master and other applications. DC1880A operates from an external supply VDD and utilizes the DC590 USB serial controller board to communicate with the LTC2874 using SPI protocol. Performance Summary Design files for this circuit board are available at http://www.linear.com/demo/DC1880A L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Hot Swap, QuikEval and Linduino are trademarks of Linear Technology Corporation. IO-Link is a registered trademark of PROFIBUS User Organization (PNO). All other trademarks are the property of their respective owners. Specifications are at TA = 25°C, VDD = 24V, and VL = 3.3V. SYMBOL PARAMETER CONDITIONS MIN VDD Input Supply Range 24VMODE = 0 24VMODE = 1 8 20 ΔVACL L+ Analog Current Limit Voltage ΔVACL = VSENSE+ – VSENSE– VL+ = 0V, FLDBK_MODE = 1 VL+ = VDD – 1V Start-Up, 2XPTC Enabled, VL+ > 18V 9.2 42 16.7 50 100 24.2 58 ΔVGATE External N-Channel Gate Drive (VGATE – VL+) IGATE = –1µA VDD = 17V to 30V VDD = 8V 10 4.5 13 15 15 V V V VRQH, VRQL CQ Residual Voltage Output High, ICQ = –100mA Output Low, ICQ = 100mA 1.2 1.1 1.6 1.5 V V IQPKH, IQPKL Wake-Up Request (WURQ) Current IQH, IQL CQ Current Limit fDTR Maximum Data Transfer Rate tWU WURQ Pulse Duration SCK Frequency fDTR = 4nF SLEW = 0 SLEW = 1 MAX 30 30 ±500 ±700 ±110 ±160 UNITS V V mV mV mV mA ±230 38.4 230.4 75 50% Duty Cycle TYP mA kb/s kb/s 80 85 µs 20 MHz dc1880af 1 DEMO MANUAL DC1880A Quick Start Procedure Figure 1. Proper Setup 2 dc1880af DEMO MANUAL DC1880A Quick Start Procedure DC1880A is a 6-layer demonstration board. An LDO is included to optionally derive the VL logic supply from the VDD input supply. An LED lights up when the IRQ pin signals interrupt requests. 5. Before connecting the input power supply to the DC1880A board, verify the voltage is below 40V (normally between 8V and 30V) and that the supply is turned off. 1. Install, or update as needed, Linear Technology's QuikEval™ evaluation software on the PC. See Using the LTC2874 Software section for more information. 6. Connect the power supply between VDD and GND on the DC1880A board as shown in Figure 1. 2. Connect the DC590 board to the PC with a standard USB A/B cable. 3. Connect the DC1880A board to the DC590 board using the 14-conductor ribbon cable supplied with the DC590 board. 4. Choose the source for the VL logic supply—the DC590, the LDO on the DC1880A, or either if both are set to the same voltage: a. Set the DC1880A LDO jumpers (JP11 and JP12) and DC590 VCCIO jumper (JP6) to one of the combinations listed in Table 1. Default jumper positions set both boards to 5V. b. When using a Linduino™ One instead of a DC590 board, set the DC1880A LDO to 5V (JP11 = 5.0V) or disable it (JP12 = OPEN). 7. Connect line interface cables (up to 20m long) to either the screw-terminal blocks (J1-J4) or the IO-Link connectors (J5-J8). 8. Turn on the 24V power supply and verify that the IRQ LED on the DC1880A board is lit. (The LTC2874 is signalling that one or more of its supplies had been low.) 9. Launch the GUI software. Refer to the Using the LTC2874 Software section for more information on how to control the LTC2874 using the GUI. 10.Clear the IRQ condition by clearing any Supply Event bits that are set. On the Events tab, simply click on any lamps that are lit. 11.Refer to the Additional Information section and the data sheet for operating details. dc1880af 3 DEMO MANUAL DC1880A Additional Information VL Logic Supply Table 3. CQ Driver Output Level Configuration Table 1 lists several ways to supply power to the VL pin. Methods 1a/b/c are recommended for most purposes. Table 1. Recommended Options for Powering the VL Supply METHOD DC590 JP6 DC1880A JP12 DC1880A JP11 SOURCE FOR VL POWER 1a 1b 1c 5V* 3.3V OPEN (2.7V) ON* ON* ON* 5V* 3.3V OPEN (2.9V) LDO or DC590 LDO or DC590 LDO or DC590 2 EXT ON* X** LDO 3 EXT OPEN X** DC1880A VL TURRET 4 5V* or 3.3V OPEN X** DC590 JP2/4/8/10 SETTING TXD TURRET DRVEN BIT CQ DRIVER MODE* CQ LEVEL GND GND/VL EXT DB9 X X L/H X X X X H/L** OFF ON ON ON L H/L H/L H/L * From Table 2 ** RS232 transceiver U2 inverts Alternatively, operate the CQ drivers solely via the SPI interface by tying TXD low and controlling the DRVEN register bits. This method is suitable for SIO mode and switching at or below COM2 data rates (38.4kb/s). * (Default) ** Including OPEN (2.9V) TVS Protection L+ Power Supply Outputs The CQ and L+ pins are protected by 36V TVS diodes for cable-driving applications. Enable the L+ power supply outputs by setting their respective EN_L+ register bits high. CQ Line Driver Outputs Enable the CQ line drivers either by input pin (using the TXEN turrets and/or jumpers JP1/3/7/9) or via the SPI interface (by setting DRVEN register bits high). See Table 2. Table 2. CQ Driver Mode Configuration JP1/3/7/9 SETTING TXEN TURRET DRVEN BIT CQ DRIVER MODE GND VL X EXT X X X L/H 0 X 1 0 OFF ON ON OFF/ON Control the output CQ states using the TXD turrets and/ or jumpers JP2/4/8/10. See Table 3. Serial Port A DB9 connector enables CQ data to be sent (for one or more ports) and received (for one port) using PC software such as a serial terminal program. Jumper JP5 enables the required RS-232 transceiver. Select the desired combination of drivers by setting one or more of JP2/4/8/10 to the DB9 position. Select one CQ receiver using JP6. L+ Isolation If L+ isolation is not needed, Schottky diodes D1-D4 may be replaced with 0Ω resistors. Interrupts The LTC2874 includes an open-drain interrupt line for signaling the host controller when it needs service. This signal is accessible on the DC1880A board at the IRQ test point. An LED is also included for convenience. 4 dc1880af DEMO MANUAL DC1880A Additional Information Jumpers JP1/3/7/9: Port 4/3/2/1 CQ Driver Enables. See Table 2. Default position VL. JP5: COM PORT Enable. Connects RS232 transceiver U2 to VL logic supply. Default position ON. JP2/4/8/10: Port 4/3/2/1 Data Input to CQ Driver. See Table 3. Default position GND. JP11: VL Select. Programs LDO voltage to 2.9V (OPEN), 3.3V, 5V, or 5.5V. Default position 5V. JP6: RXDn COM Port Select. Determines which receiver output (RXD1/2/3/4, if any) is connected to the serial port. Default position RXD1. JP12: LDO On. Enables LDO which derives VL logic supply from VDD supply voltage input. Default position ON. JP13: GND Shield. Shorts shields of J5-8 to GND. Default position OPEN. dc1880af 5 DEMO MANUAL DC1880A Using the DC1880A Software Introduction Reset Button Linear Technology’s QuikEval software provides a quick and easy way to evaluate most aspects of LTC2874 operation. It operates a SPI interface that reads or writes from the 14 onboard registers via a DC590 serial controller. This button issues a SPI Reset command, returning all registers to default values. Install QuikEval BEFORE connecting the DC1880A to the USB port of the PC. Download and run the installation program from http://www.linear.com/software and follow the onscreen instructions. The LTC2874 GUI will launch automatically when the PC begins communicating with the DC1880A via the serial controller. Thereafter, start the GUI by running QuikEval from: This tab contains lamps that map to Event Register bits. A lamp that is on indicates that the corresponding bit in the LTC2874 Event Register has been set. Clicking on a lamp will clear the Event bit if the condition no longer persists. Event Register behavior is sticky, meaning each lamp stays on until cleared. C:\Program Files\LTC\QuikEval\quikeval.exe If the QuikEval software was installed previously, update it to the latest version using Tools > Update Program. The LTC2874 GUI is composed of a main window having three tabs, and a Register Map window. The Ports tab (Figure 2) contains controls and monitors that are unique to each individual port. The Timers and Globals tab (Figure 3) contains controls and monitors that are common to all ports. The Events tab (Figure 4) provides access to event monitoring registers. The Register Map window (Figure 5) provides access to all register bits via an alternate format. Events Tab The check boxes control which events will cause IRQ to signal. Register Map This window presents all register bits in an alternate format. Change register values directly by clicking on individual bits, using arrow widgets, or by entering numeric values. Changed bits appear yellow until either committed to the LTC2874 by pressing the Write and Update button, or cleared by pressing the Discard Unwritten Changes button. The LTC2874 GUI begins communicating with the DC1880A automatically. Once running, it continuously polls the LTC2874 registers to monitor status. The Save Current Values button saves the LTC2874 register values to a text file. The Load Saved Values button loads the register values from one such file into the Register Map window. (Write and Update will then configure LTC2874 accordingly.) Connect/Disconnect Button Running QuikEval GUI Using Linduino One The Disconnect button disables the SPI interface and most of the GUI. The Connect button restarts SPI polling and activates the complete GUI. The QuikEval GUI software for DC1880A may be operated using a Linduino One (DC2026) with the DC590 emulator sketch in place of the DC590. When using this USB-isolated Arduino-compatible demonstration board, set the DC1880A LDO to 5V (JP11=5.0V) or disable it (JP12=OPEN). 6 dc1880af DEMO MANUAL DC1880A Using the DC1880A Software Figure 2. Main Window, Ports Tab dc1880af 7 DEMO MANUAL DC1880A Using the DC1880A Software Figure 3. Main Window, Timers and Globals Tab 8 dc1880af DEMO MANUAL DC1880A Using the DC1880A Software Figure 4. Main Window, Events Tab Figure 5. Register Map Window dc1880af 9 DEMO MANUAL DC1880A Troubleshooting Guide 1. Problem: LTC2874 program doesn't download and install automatically. 4. Problem: Unsuccessful communication with the LTC2874. (Error 5) Solution: Get the latest QuikEval software either by updating QuikEval from its pull-down menu (Tools > Update Program), or by installing the latest version directly from: www.linear.com/software. 2. Problem: DC590 controller board not detected. (Error 1) Solution: Connect to PC using USB A/B cable. 3. Problem: LTC2874 not detected. (Error 2) Solution: Ensure that the DC590 ribbon cable is connected and that VL power is applied. See Table 1. 10 Solution: Check DC590 ribbon and USB connections. Usually, this error indicates that one was disconnected while the program was running. 5. Problem: Invalid value read from the LTC2874. (Error 6) Solution: Ensure VL supply power is applied correctly. Referring to Table 1, check LDO jumper on the DC1880A and JP6 on the DC590. 6. Problem: GUI is gray-colored and inactive. Solution: Press Connect button. dc1880af DEMO MANUAL DC1880A Parts List ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER CAP, 1µF 20%, 16V, X7R, 0603 TDK, C1608X7R1C105M Required Circuit Components 1 1 C1 2 1 C2 CAP, 1µF 10%, 50V, X7R, 0805 MURATA, GRM21BR71H105KA12L 3 1 C9 CAP, ALUMINUM, 100µF, 20%, 63V UCC, EMZA630ADA101MJA0G 4 8 D5-12* DIODE, TVS, 36V, SMA STM, SM6T36A 5 4 Q1-4 TRANSISTOR, NFET, SOT-223 FAIRCHILD, FQT7N10TF 6 4 R1-4 RES, 10Ω,1%, 0603 AAC, CR16-10R0FM 7 4 R25-28 RES, 0.2Ω, 1%, 0805 SUSUMO, RL1220S-R20-F 8 1 U1 IC, QUAD IO-LINK MASTER HOT SWAP CONTROLLER AND PHY LINEAR TECH, LTC2874IFE CAP, 1µF, 20%, 16V X7R, 0603 TDK, C1608X7R1C105M Additional Demo Board Circuit Components 1 3 C3,C4,C6 2 1 C5 CAP, 0.22µF, 10%, 16V X7R, 0603 TDK, C1608X7R1C224K 3 1 C7 CAP, 0.1µF, 10%, 25V X7R, 0603 TDK, C1608X7R1E104K AVX, TAJD475K050R 4 1 C8 CAP, TANTALUM, 4.7µF, 20%, 7343 50V 5 0 C10-21 OPTIONAL 6 4 D1-4** DIODE, SCHOTTKY, 1A, 100V FAIRCHILD, S100 7 1 D13 LED, RED PANASONIC, LN1251C 8 1 L1 INDUCTOR, 10µH, 0.5Ω, 0.3A, 0806 TAIYO-YUDEN, CBC2016T100M 9 9 R5-12, R24 RES, 100, 5%, 1206 AAC, CR18-101JM 10 1 R22 RES, 4.99k, 1%, 0603 AAC, CR16-4991FM 11 3 R13-15 RES, 4.99k, 1%, 0603 AAC, CR16-4991FM 12 1 R16 RES, 100k, 1%, 0603 AAC, CR16-1003FM 13 1 R17 RES, 75k, 1%, 0603 VISHAY, CRCW060375K0FKEA 14 1 R18 RES, 10k, 1%, 0603 AAC, CR16-1002FM 15 1 R19 RES, 309k, 1%, 0603 VISHAY, CRCW0603309KFKEA 16 1 R20 RES, 59k, 1%, 0603 AAC, CR16-5902FM 17 1 R21 RES, 47.5k, 1%, 0603 AAC, CR16-4752FM 18 1 R23 RES, 680, 1%, 0603 AAC, CR16-681FM 19 0 R29-32 OPTIONAL 20 1 U2 IC, RS232 TRANSCEIVER LINEAR TECH, LTC2802CDE 21 1 U3 IC, LDO LINEAR TECH, LT3012EFE 22 1 U4 IC, SERIAL EEPROM 2k MICROCHIP, 24LC025-I/ST TURRET MILL-MAX, 2308-2-00-80-00-00-07-0 Hardware for Demo Board Only 1 12 E1-6, E8-13 2 6 E7, E14-18 TURRET MILL-MAX, 2501-2-00-80-00-00-07-0 3 4 J1-4 TERMINAL BLOCK, 5 POSITION, 3.5mm, HEADER WÜRTH, 691321100005 4 4 J1-4 TERMINAL BLOCK, 5 POSITION, 3.5mm, PLUG WÜRTH, 691361100005 BINDER, 09-3442-500-05 5 1 J5 JACK, M12, 5 POSITION, FEMALE, STRAIGHT 6 0 J6-8 OPTIONAL 7 1 J9 CONNECTOR, DSUB, 9 PIN FEMALE * TVS diodes are recommended for cable-driving applications. ** Substitute 0Ω resistors if diodes not desired. SIGNATRON, DR-E9SB-NJ-001 dc1880af 11 DEMO MANUAL DC1880A Parts List ITEM QTY 8 2 REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER J10-11 JACK, BANANA KEYSTONE, 575-4 9 1 J12 HEADER, 2×7 2mm MOLEX, 87831-1420 10 5 JP1, JP3, JP7, JP9, JP11 HEADER, 2×3 2mm SAMTEC, TMM-103-02-L-D 11 5 JP2, JP4, JP6, JP8, JP10 HEADER, 2×4 2mm SAMTEC, TMM-104-02-L-D 12 2 JP5, JP12 HEADER, 1×2 2mm SAMTEC, TMM-102-02-L-S 13 12 JP1-12 SHUNT, 2mm SAMTEC, 2SN-BK-G 14 1 JP13 HEADER, 1×2 0.1" SAMTEC, TSW-101-07-G-D 15 1 JP13 SHUNT, 0.1" SAMTEC, SNT-100-BK-G 16 4 STANDOFF, SNAP-ON KEYSTONE, 8833 12 dc1880af 10 9 8 7 6 5 4 3 2 4.99k 4.99k R14 R15 A U4 24LC025 4.99k R13 J12 DC590 C7 B 0.1uF/25V CS 1 3 5 7 9 11 13 C5 220nF/16V SDO 2 4 6 8 10 12 14 R24 100 1206 LINE IN LINE OUT SCK 1 6 2 7 3 8 4 9 5 B SDI COM PORT (DB9) GND DCD DSR RX RTS TX CTS DTR J9 SCK CS VDD IRQ D13 RED R23 680 IRQ C IRQ R22 4.99k VL 1uF/16V C4 GND 6 3 10 8 9 11 12 VCC VL PS MODE CAP TOUT TIN RIN ROUT SW U2 LTC2802 1uF/16V C3 4 7 2 1 5 10uH L1 C VEE 13 1 SDI SDO 5 6 7 8 VSS SDA A2 SCL A1 WP A0 VCC Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. 4 3 2 1 TXn TXD4 RXD4 TXD3 RXD3 TXD2 RXD2 TXD1 RXD1 E2 E3 E5 E6 E9 E10 E12 E13 1uF/16V C6 JP5 D 1206 R6 100 1206 R8 100 1206 R10 100 1206 R12 100 COM PORT ENABLE D VL GND EXT DB9 VL GND EXT DB9 VL GND EXT DB9 VL GND EXT DB9 VL A TXD4 JP2 TXD3 JP4 TXD2 JP8 TXD1 JP10 E14 TXEN1 JP9 C8 GND E17 VL SDI SCK CS TXEN2 TXEN3 E4 R7 100 1206 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 3.3V 5.0V 5.5V E F 1. ALL RESISTORS ARE IN OHMS, 0603. ALL CAPACITORS ARE IN MICROFARADS, 0603. G 5 4 75k TXEN4 E1 R5 100 1206 VL EXT GND VL 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 C9 J10 VL EXT GND JP12 LDO ON 11 13 1uF/50V 0805 100uF/63V DIA=12.5mm C2 TXEN4 JP1 10k R18 SHDN IN GND VDD 8V - 30V CUSTOMER NOTICE TXEN3 JP3 6 L+1 SENSE-1 GATE1 CQ1 CQ2 L+2 SENSE-2 GATE2 VDD SENSE+ L+3 SENSE-3 GATE3 CQ3 CQ4 L+4 SENSE-4 GATE4 TXEN4 47.5k 59k R21 309k R20 R19 ADJ OUT J11 H G H THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMERS RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. VL RXD1 TXD1 TXEN1 IRQ SDO RXD2 TXD2 TXEN2 VL GND GND SDI SCK CS RXD3 TXD3 TXEN3 RXD4 TXD4 U1 LTC2874IFE GND E15 U3 LT3012 GND E7 R17 VL SELECT JP11 GND E18 2.9V R16 100k VL EXT GND IRQ SDO JP7 1uF/16V C1 4.7uF/16V 3528 TXEN2 E8 R9 100 1206 VL EXT GND RXDn COM PORT SELECT VL F GND VL 2.9V - 5.5V NOTES: UNLESS OTHERWISE SPECIFIED TXEN1 VL RXD4 RXD3 RXD2 RXD1 E11 R11 100 1206 VL TXn VL TXn VL TXn VL TXn JP6 E I SCALE = NONE APP ENG. KEITH B. PCB DES. KEITH B. 0.2 R26 0.2 R28 0.2 R27 0.2 10 10 R2 10 10 OPEN C12 OPEN C14 OPEN C21 OPEN C20 OPEN C19 OPEN C18 DATE: N/A SIZE J K LTC2874IFE DEMO CIRCUIT 1880A Monday, October 28, 2013 IC NO. JP13 GND - SHIELD D12 36V D11 36V D10 36V D9 36V D8 36V D7 36V D6 36V D5 36V 2 1 5 4 3 2 1 5 4 3 2 1 5 4 3 2 1 5 4 3 5 4 3 2 1 5 4 3 2 1 5 4 3 2 1 5 4 3 2 1 KEITH B. APPROVED J4 J3 J2 J1 L DATE NC4 C/Q4 L-4 I/Q4 L+4 J8 NC3 C/Q3 L-3 I/Q3 L+3 J7 NC2 C/Q2 L-2 I/Q2 L+2 J6 NC1 C/Q1 L-1 I/Q1 L+1 J5 9-17-12 SHEET 1 L OF 1 2 REV. 1630 McCarthy Blvd. Milpitas, CA 95035 LTC CONFIDENTIAL Phone: (408) 432-1900 FOR CUSTOMER Fax: (408) 434-0507 USE ONLY www.linear.com I/Q4 L+4 NC4 C/Q4 L-4 I/Q3 L+3 NC3 C/Q3 L-3 I/Q2 L+2 NC2 C/Q2 L-2 I/Q1 L+1 NC1 C/Q1 L-1 QUAD INDUSTRIAL BUS MASTER CONTROLLER TECHNOLOGY OPEN C16 Q4 FQT7N10 OPEN OPEN R32 C17 R4 S100 D4 DESCRIPTION 1ST PROTOTYPE OPEN Q3 FQT7N10 OPEN OPEN R31 C15 R3 S100 D3 K REVISION HISTORY C10 Q2 FQT7N10 OPEN OPEN R30 C13 S100 D2 OPEN OPEN R29 C11 R1 S100 J Q1 FQT7N10 TITLE: SCHEMATIC 0805 0805 0805 0805 D1 2 - R25 REV ECO APPROVALS VDD E16 I 9 8 7 6 5 4 3 2 1 DEMO MANUAL DC1880A Schematic Diagram dc1880af 13 DEMO MANUAL DC1880A DEMONSTRATION BOARD IMPORTANT NOTICE Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions: This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations. If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES. The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or agency certified (FCC, UL, CE, etc.). No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind. LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive. Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and observe good laboratory practice standards. Common sense is encouraged. This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC application engineer. Mailing Address: Linear Technology 1630 McCarthy Blvd. Milpitas, CA 95035 Copyright © 2004, Linear Technology Corporation 14 Linear Technology Corporation dc1880af LT 1213 • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 2013