TC74 Tiny Serial Digital Thermal Sensor Features General Description • Digital Temperature Sensing in SOT-23-5 or TO-220 Packages • Outputs Temperature as an 8-Bit Digital Word • Simple SMBus/I2C™ Serial Port Interface • Solid-State Temperature Sensing: - ±2°C (max.) Accuracy from +25°C to +85°C - ±3°C (max.) Accuracy from 0°C to +125°C • Supply Voltage of 2.7V to 5.5V • Low Power: - 200 µA (typ.) Operating Current - 5 µA (typ.) Standby Mode Current The TC74 is a serially accessible, digital temperature sensor particularly suited for low cost and small formfactor applications. Temperature data is converted from the onboard thermal sensing element and made available as an 8-bit digital word. Applications • Thermal Protection for Hard Disk Drives and other PC Peripherals • PC Card Devices for Notebook Computers • Low Cost Thermostat Controls • Power Supplies • Thermistor Replacement Package Types Communication with the TC74 is accomplished via a 2wire SMBus/I2C compatible serial port. This bus also can be used to implement multi-drop/multi-zone monitoring. The SHDN bit in the CONFIG register can be used to activate the low power Standby mode. Temperature resolution is 1°C. Conversion rate is a nominal 8 samples/sec. During normal operation, the quiescent current is 200 µA (typ). During standby operation, the quiescent current is 5 µA (typ). Small size, low installed cost and ease of use make the TC74 an ideal choice for implementing thermal management in a variety of systems. Functional Block Diagram Internal Sensor (Diode) TO-220 SOT-23 SCLK SDA SCLK 5 4 Modulator TC74 Control Logic TC74 12345 NC SDA GND SCLK VDD SDA Serial Port Interface 1 2 3 NC GND VDD Temperature Register Note: The TO-220 tab is connected to pin 3 (GND) 2001-2012 Microchip Technology Inc. DS21462D-page 1 TC74 1.0 ELECTRICAL CHARACTERISTICS 1.1 Absolute Maximum Ratings† Supply Voltage (VDD) ............................................ +6V Voltage On Any Pin ....... (GND – 0.3V) to (VDD + 0.3V) † Notice: Stresses above those listed under "Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operation listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability. Current On Any Pin ..........................................±50 mA Operating Temperature (TA) ........ -40°C TA +125°C Storage Temperature (TSTG) ..............-65°C to +150°C Junction Temperature (TJ)................................ +150°C DC CHARACTERISTICS Electrical Specifications: Unless otherwise noted, VDD = 3.3V for TC74AX-3.3VXX and VDD = 5.0V for TC74AX-5.0VXX, -40°C TA 125°C. Note 5 Parameters Sym Min Typ Max Units Conditions Power-on Reset Threshold VPOR 1.2 — 2.2 V Supply Voltage VDD 2.7 — 5.5 V Note 5 Operating Current IDD — 200 350 µA VDD = 5.5V, Note 1 IDD-STANDBY — 5.0 10 µA VDD = 3.3V Serial Port Inactive, Note 4 TERR -2.0 -3.0 — — — ±2.0 +2.0 +3.0 — °C +25°C <TA < +85°C 0°C < TA < +125°C -40°C < TA < 0°C CR 4 8 — SPS Logic Input High VIH 0.8 x VDD — — V Logic Input Low VIL — — 0.2 x VDD V SDA Output Low VOL — — — — 0.4 0.6 V V Power Supply Standby Supply Current VDD Falling Edge or Rising Edge Temperature-to-Bits Converter Temperature Accuracy Conversion Rate Note 2 Serial Port Interface Input Capacitance SDA, SCLK IOL = 3 mA IOL = 6 mA, Note 3 CIN — 5.0 — pF ILEAK -1.0 0.1 1.0 µA fSMB 10 — 100 kHz Low Clock Period tLOW 4.7 — — µsec 10% to 10% High Clock Period tHIGH 4.0 — — µsec 90% to 90% tR tF — — — — 1000 300 nsec nsec 10% to 90% 90% to10% I/O Leakage Serial Port AC Timing (CLOAD = 80 pF) SMBus/I2C Clock Frequency SMBus/I2 C Rise Time SMBus/I2C Fall Time Note 1: Operating current is an average value integrated over multiple conversion cycles. Transient current may exceed this specification. 2: Maximum ensured conversion time after Power-on Reset (POR to DATA_RDY) is 250 msec. 3: Output current should be minimized for best temperature accuracy. Power dissipation within the TC74 will cause self-heating and temperature drift error. 4: SDA and SCLK must be connected to VDD or GND. 5: VDD = 3.3V for TC74AX -3.3 VXX. VDD = 5.0V for TC74AX -5.0 VXX. All part types of the TC74 will operate properly over the wider power supply range of 2.7V to 5.5V. Each part type is tested and specified for rated accuracy at its nominal supply voltage. As VDD varies from the nominal value, accuracy will degrade 1°C/V of VDD change. DS21462D-page 2 2001-2012 Microchip Technology Inc. TC74 DC CHARACTERISTICS (CONTINUED) Electrical Specifications: Unless otherwise noted, VDD = 3.3V for TC74AX-3.3VXX and VDD = 5.0V for TC74AX-5.0VXX, -40°C TA 125°C. Note 5 Parameters Sym Min Typ Max Units START Condition Setup Time (for repeated START Condition) tSU(START) 4.0 — — µsec START Condition Hold Time tH(START) 4.0 — — µsec Data In Setup Time tSU-DATA 1000 — — nsec Data In Hold Time tH-DAT 1250 — — nsec STOP Condition Setup Time tSU(STOP) 4.0 — — µsec Bus Free Time Prior to New Transition tIDLE 4.7 — — µsec Power-on Reset Delay tPOR — 500 — µsec Conditions 90% SCLK to 10% SDA VDD VPOR (Rising Edge) Note 1: Operating current is an average value integrated over multiple conversion cycles. Transient current may exceed this specification. 2: Maximum ensured conversion time after Power-on Reset (POR to DATA_RDY) is 250 msec. 3: Output current should be minimized for best temperature accuracy. Power dissipation within the TC74 will cause self-heating and temperature drift error. 4: SDA and SCLK must be connected to VDD or GND. 5: VDD = 3.3V for TC74AX -3.3 VXX. VDD = 5.0V for TC74AX -5.0 VXX. All part types of the TC74 will operate properly over the wider power supply range of 2.7V to 5.5V. Each part type is tested and specified for rated accuracy at its nominal supply voltage. As VDD varies from the nominal value, accuracy will degrade 1°C/V of VDD change. 2001-2012 Microchip Technology Inc. DS21462D-page 3 TC74 SMBUS Read Timing Diagram A B tLOW tHIGH C D E F G H I K J SCLK SDA tSU(START) tH(START) tSU-DATA tSU(STOP) E = Slave Pulls SDA Line Low F = Acknowledge Bit Clocked into Master G = MSB of Data Clocked into Master H = LSB of Data Clocked into Master A = Start Condition B = MSB of Address Clocked into Slave C = LSB of Address Clocked into Slave D = R/W Bit Clocked into Slave tIDLE I = Acknowledge Clock Pulse J = Stop Condition K = New Start Condition SMBUS Write Timing Diagram A B tLOW tHIGH C D E F G H I J K L M SCLK SDA tSU(START) tH(START) tSU-DATA A = Start Condition B = MSB of Address Clocked into Slave C = LSB of Address Clocked into Slave D = R/W Bit Clocked into Slave E = Slave Pulls SDA Line Low FIGURE 1-1: DS21462D-page 4 tH-DATA F = Acknowledge Bit Clocked into Master G = MSB of Data Clocked into Slave H = LSB of Data Clocked into Slave I = Slave Pulls SDA Line Low tSU(STOP) tIDLE J = Acknowledge Clocked into Master K = Acknowledge Clock Pulse L = Stop Condition, Data Executed by Slave M = New Start Condition Timing Diagrams. 2001-2012 Microchip Technology Inc. TC74 2.0 PIN DESCRIPTIONS The descriptions of the pins are listed in Table 2-1. TABLE 2-1: 2.1 PIN FUNCTION TABLE Pin No. (5-Pin SOT-23) Pin No. (5-Pin TO-220) Symbol Type Description 1 1 NC None No Internal Connection 2 3 GND Power System Ground 3 5 VDD Power Power Supply Input 4 4 SCLK Input SMBus/I2C Serial Clock 5 2 SDA Bidirectional SMBus/I2C Serial Data Ground (GND) Input. Ground return for all TC74 functions. 2.2 Power Supply Input (VDD) Power supply input. See Electrical Specifications. 2.3 SMBus/I2C Serial Clock (SCLK) Input. SMBus/I2C serial clock. Clocks data into and out of the TC74. See System Management Bus Specification, Rev. 1.0, for timing diagrams. 2.4 Serial Data (SDA) Bidirectional. Serial data is transferred on the SMBus/ I2C in both directions using this pin. See System Management Bus Specification, Rev. 1.0 for timing diagrams. 2001-2012 Microchip Technology Inc. DS21462D-page 5 TC74 3.0 DETAILED DESCRIPTION 3.1 Functional Description TABLE 3-2: Term SERIAL BUS CONVENTIONS Explanation Transmitter The device sending data to the bus. The TC74 acquires and converts temperature information from its onboard solid-state sensor with a resolution of ±1°C. It stores the data in an internal register which is then read through the serial port. The system interface is a slave SMBus/I2C port, through which temperature data can be read at any time. Eight SMBus/I2C addresses are programmable for the TC74, which allows for a multi-sensor configuration. Also, there is low power Standby mode when temperature acquisition is suspended. Receiver The device receiving data from the bus. Master The device which controls the bus initiating transfers (START), generating the clock and terminating transfers (STOP). Slave The device addressed by the master. START A unique condition signaling the beginning of a transfer indicated by SDA falling (high-low) while SCLK is high. 3.1.1 STOP A unique condition signaling the end of a transfer indicated by SDA rising (lowhigh) while SCLK is high. ACK A Receiver acknowledges the receipt of each byte with this unique condition. The Receiver drives SDA low during SCLK high of the ACK clock-pulse. The Master provides the clock pulse for the ACK cycle. Busy Communication is not possible because the bus is in use. NOT Busy When the bus is idle, both SDA and SCLK will remain high. Data Valid The state of SDA must remain stable during the high period of SCLK in order for a data bit to be considered valid. SDA only changes state while SCLK is low during normal data transfers (see START and STOP conditions). STANDBY MODE The host is allowed, by the TC74, to put it into a low power (IDD = 5 µA, typical) Standby mode. In this mode, the A/D converter is halted and the temperature data registers are frozen. The SMBus/I2C port, though, operates normally. Standby mode is enabled by setting the SHDN bit in the CONFIG register. Table 3-1 summarizes this operation. TABLE 3-1: STANDBY MODE OPERATION SHDN Bit Operating Mode 0 Normal 1 Standby 3.1.2 SMBUS/I2C SLAVE ADDRESS The TC74 is internally programmed to have a default SMBus/I2C address value of 1001 101b. Seven other addresses are available by custom order (contact Microchip Technology Inc. 3.2 Serial Port Operation The Serial Clock input (SCLK) and bidirectional data port (SDA) form a 2-wire bidirectional serial port for programming and interrogating the TC74. The conventions used in this bus architecture are listed in Table 3-2. DS21462D-page 6 All transfers take place under the control of a host, usually a CPU or microcontroller, acting as the Master. This host provides the clock signal for all transfers. The TC74 always operates as a Slave. The serial protocol is illustrated in Figure 3-1. All data transfers have two phases and all bytes are transferred MSB first. Accesses are initiated by a START condition, followed by a device address byte and one or more data bytes. The device address byte includes a Read/Write selection bit. Each access must be terminated by a STOP condition. A convention called “Acknowledge” (ACK) confirms receipt of each byte. Note that SDA can change only during periods when SCLK is low (SDA changes while SCLK is high are reserved for START and STOP conditions). 2001-2012 Microchip Technology Inc. TC74 Write Byte Format S Address WR ACK Command 7 Bits ACK Data 8 Bits Slave Address ACK P 8 Bits Command Byte: selects which register you are writing to. Data Byte: data goes into the register set by the command byte. Read Byte Format S Address WR ACK Command 7 Bits ACK S Address 8 Bits Slave Address RD ACK 7 Bits Command Byte: selects which register you are reading from. Data NACK P 8 Bits Slave Address: repeated due to change in dataflow direction. Data Byte: reads from the register set by the command byte. Receive Byte Format S Address RD ACK 7 Bits S = START Condition P = STOP Condition Shaded = Slave Transmission FIGURE 3-1: 3.3 Data NACK Data Byte: reads data from the register commanded by the last Read Byte or Write Byte transmission. SMBus/I2C Protocols. START Condition (S) The TC74 continuously monitors the SDA and SCLK lines for a START condition (a high-to-low transition of SDA while SCLK is high) and will not respond until this condition is met. 3.4 3.6 Data Byte After a successful ACK of the address byte, the host must transmit the data byte to be written, or clock-in the data to be read (see the appropriate timing diagrams). ACK will be generated upon a successful write of a data byte into the TC74. Address Byte Immediately following the START condition, the host must transmit the address byte to the TC74. The states of A2, A1 and A0 determine the SMBus/I2C address for the TC74. The 7-bit address transmitted in the serial bit stream must match for the TC74 to respond with an Acknowledge (indicating the TC74 is on the bus and ready to accept data). The 8-bit in the address byte is a Read/Write bit. This bit is a ‘1’ for a read operation or ‘0’ for a write operation. During the first phase of any transfer, this bit will be set = 0, indicating that the command byte is being written. 3.5 P 8 Bits 3.7 STOP Condition (P) Communications must be terminated by a STOP condition (a low-to-high transition of SDA while SCLK is high). The STOP condition must be communicated by the transmitter to the TC74. Refer to Figure 1-1, “Timing Diagrams”, for serial bus timing. Acknowledge (ACK) Acknowledge (ACK) provides a positive handshake between the host and the TC74. The host releases SDA after transmitting 8 bits. The host then generates a ninth clock cycle to allow the TC74 to pull the SDA line low. This action acknowledges that the TC74 successfully received the previous 8 bits of data or address. 2001-2012 Microchip Technology Inc. DS21462D-page 7 TC74 4.0 REGISTER SET AND PROGRAMMER’S MODEL TABLE 4-1: COMMAND BYTE DESCRIPTION (SMBUS/I2C READ_BYTE AND WRITE_BYTE) TABLE 4-3: TEMPERATURE REGISTER (TEMP) D[7] D[6] D[5] D[4] D[3] D[2] D[1] D[0] MSB X X X X X X LSB Command Code RTR 00h Read Temperature (TEMP) In temperature data registers, each unit value represents one degree (Celsius). The value is in 2’s complement binary format such that a reading of 0000 0000b corresponds to 0°C. Examples of this temperature to binary value relationship are shown in Table 4-4. RWCR 01h Read/Write Configuration (CONFIG) TABLE 4-4: TABLE 4-2: Bit POR D[7] 0 D[6] 0 D[5]D[0] 0 Function CONFIGURATION REGISTER (CONFIG); 8 BITS, READ/ WRITE) Actual Temperature Registered Temperature Binary Hex Operation +130.00°C +127°C 0111 1111 STANDBY Switch Read/ 1 = standby, Write 0 = normal +127.00°C +127°C 0111 1111 +126.50°C +126°C 0111 1110 Data Ready * Read 1 = ready Only 0 = not ready +25.25°C +25°C 0001 1001 +0.50°C 0°C 0000 0000 +0.25°C 0°C 0000 0000 0.00°C 0°C 0000 0000 -0.25°C -1°C 1111 1111 -0.50°C -1°C 1111 1111 -0.75°C -1°C 1111 1111 -1.00°C -1°C 1111 1111 -25.00°C -25°C 1110 0111 -25.25°C -26°C 1110 0110 -54.75°C -55°C 1100 1001 -55.00°C -55°C 1100 1001 -65.00°C -65°C 1011 1111 Function Reserved Always returns zero when read Type N/A N/A Note 1: *DATA_RDY bit RESET at power-up and SHDN enable. VDD DATA_RDY 4.2 Register Set Summary The TC74 register set is summarized in Table 4-5. All registers are 8 bits wide. SHDN tconv tconv TABLE 4-5: FIGURE 4-1: DATA_RDY, SHDN Operation Logic Diagram. Name 4.1 Temperature Register (TEMP), 8 Bits, READ ONLY The binary value (2’s complement format) in this register represents temperature of the onboard sensor following a conversion cycle. The registers are automatically updated in an alternating manner. DS21462D-page 8 TEMPERATURE-TO-DIGITAL VALUE CONVERSION (TEMP) TEMP CONFIG TC74 REGISTER SET SUMMARY Description POR State Internal Sensor 0000 Temperature (2’s 0000b (1) Complement) CONFIG Register 0000 0000b Read Write N/A Note 1: The TEMP register will be immediately updated by the A/D converter after the DATA_RDY Bit goes high. 2001-2012 Microchip Technology Inc. TC74 5.0 PACKAGING INFORMATION 5.1 SOT23A Package Marking Information 5-Pin SOT-23A 5 4 1 & 2 = part number code + temp. range and voltage 3 = year and quarter code 1 2 3 4 1 4 = lot ID number 3 2 SOT-23 Package Marking Codes SOT-23 (V) Address Code SOT-23 (V) Address Code TC74A0-3.3VCT 1001 000 V0 TC74A0-5.0VCT 1001 000 U0 TC74A1-3.3VCT 1001 001 V1 TC74A1-5.0VCT 1001 001 U1 TC74A2-3.3VCT 1001 010 V2 TC74A2-5.0VCT 1001 010 U2 TC74A3-3.3VCT 1001 011 V3 TC74A3-5.0VCT 1001 011 U3 TC74A4-3.3VCT 1001 100 V4 TC74A4-5.0VCT 1001 100 U4 TC74A5-3.3VCT 1001 101* V5 TC74A5-5.0VCT 1001 101* U5 TC74A6-3.3VCT 1001 110 V6 TC74A6-5.0VCT 1001 110 U6 TC74A7-3.3VCT 1001 111 V7 TC74A7-5.0VCT 1001 111 U7 Note: * Default Address TO-220 Package Marking Information TO-220 Legend: XX...X YY WW NNN Note: In the event the full Microchip part number cannot be marked on one line, it will be carried over to the next line thus limiting the number of available characters for customer specific information. TC74A03.3VAT 0229123 1 * 2 3 4 Customer specific information* Year code (last 2 digits of calendar year) Week code (week of January 1 is week ‘01’) Alphanumeric traceability code 5 Standard marking consists of Microchip part number, year code, week code, and traceability code. 2001-2012 Microchip Technology Inc. DS21462D-page 9 TC74 5.2 Taping Forms Component Taping Orientation for 5-Pin SOT-23A (EIAJ SC-74A) Devices User Direction of Feed Device Marking W PIN 1 P Standard Reel Component Orientation for TR Suffix Device (Mark Right Side Up) Carrier Tape, Number of Components Per Reel and Reel Size: Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size 5-Pin SOT-23A 8 mm 4 mm 3000 7 in. DS21462D-page 10 2001-2012 Microchip Technology Inc. TC74 5.3 Package Dimensions Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging SOT-23A-5 .075 (1.90) REF. .122 (3.10) .098 (2.50) .071 (1.80) .059 (1.50) .020 (0.50) .012 (0.30) PIN 1 .037 (0.95) REF. .118 (3.00) .010 (2.80) .057 (1.45) .035 (0.90) .010 (0.25) .004 (0.09) 10° MAX. .006 (0.15) .000 (0.00) .024 (0.60) .004 (0.10) Dimensions: inches (mm) 2001-2012 Microchip Technology Inc. DS21462D-page 11 TC74 Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging 5-Pin TO-220 .185 (4.70) .165 (4.19) .117 (2.97) .103 (2.62) .415 (10.54) .390 (9.91) .156 (3.96) .140 (3.56) DIA. .055 (1.40) .045 (1.14) .293 (7.44) .204 (5.18) 3 - 7.5 5 PLCS. .613 (15.57) .569 (14.45) .037 (0.95) .025 (0.64) .590 (14.99) .482 (12.24) .025 (0.64) .012 (0.30) .072 (1.83) .062 (1.57) PIN 1 .273 (6.93) .263 (6.68) .115 (2.92) .087 (2.21) Dimensions: inches (mm) DS21462D-page 12 2001-2012 Microchip Technology Inc. TC74 6.0 REVISION HISTORY Revision D (December 2012) Added a note to each package outline drawing. 2001-2012 Microchip Technology Inc. DS21462D-page 13 TC74 NOTES: DS21462D-page 14 2001-2012 Microchip Technology Inc. TC74 PRODUCT IDENTIFICATION SYSTEM To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office. PART NO. Device XX -XX X XX Address Supply Operating Package Options Voltage Temperature Device: TC74: Address Options: A0 A1 A2 A3 A4 A5 A6 A7 Serial Digital Thermal Sensor = = = = = = = = 1001 1001 1001 1001 1001 1001 1001 1001 000 001 010 011 100 101 * 110 111 * Default Address Supply Voltage: 3.3 5.0 = Accuracy optimized for 3.3V = Accuracy optimized for 5.0V Operating Temperature: V = -40°C TA +125°C Package: a) TC74A0-3.3VCTTR: SOT-23 Serial Digital Thermal Sensor b) TC74A1-3.3VCTTR: SOT-23 Serial Digital Thermal Sensor c) TC74A2-3.3VCTTR: SOT-23 Serial Digital Thermal Sensor d) TC74A3-3.3VCTTR: SOT-23 Serial Digital Thermal Sensor e) TC74A4-3.3VCTTR: SOT-23 Serial Digital Thermal Sensor f) TC74A5-3.3VCTTR: SOT-23 Serial Digital Thermal Sensor * g) TC74A6-3.3VCTTR: SOT-23 Serial Digital Thermal Sensor h) TC74A7-3.3VCTTR: SOT-23 Serial Digital Thermal Sensor a) TC74A0-5.0VCTTR: SOT-23 Serial Digital Thermal Sensor b) TC74A1-5.0VCTTR: SOT-23 Serial Digital Thermal Sensor c) TC74A2-5.0VCTTR: SOT-23 Serial Digital Thermal Sensor d) TC74A3-5.0VCTTR: SOT-23 Serial Digital Thermal Sensor e) TC74A4-5.0VCTTR: SOT-23 Serial Digital Thermal Sensor f) TC74A5-5.0VCTTR: SOT-23 Serial Digital Thermal Sensor * g) TC74A6-5.0VCTTR: SOT-23 Serial Digital Thermal Sensor h) TC74A7-5.0VCTTR: SOT-23 Serial Digital Thermal Sensor * Default Address CTTR = SOT-23-5 (Tape and Reel only) PART NO. Device Examples: XX -XX X XX Address Supply Operating Package Options Voltage Temperature Device: Address Options: TC74: A0 A1 A2 A3 A4 A5 A6 A7 = = = = = = = = Serial Digital Thermal Sensor 1001 1001 1001 1001 1001 1001 1001 1001 000 001 010 011 100 101 * 110 111 * Default Address Output Voltage: 3.3 = Accuracy optimized for 3.3V 5.0 = Accuracy optimized for 5.0V Operating Temperature: V = -40°C TA +125°C Package: AT Examples: a) TC74A0-3.3VAT: TO-220 Serial Digital Thermal Sensor b) TC74A1-3.3VAT: TO-220 Serial Digital Thermal Sensor c) TC74A2-3.3VAT: TO-220 Serial Digital Thermal Sensor d) TC74A3-3.3VAT: TO-220 Serial Digital Thermal Sensor e) TC74A4-3.3VAT: TO-220 Serial Digital Thermal Sensor f) TC74A5-3.3VAT: TO-220 Serial Digital Thermal Sensor * g) TC74A6-3.3VAT: TO-220 Serial Digital Thermal Sensor h) TC74A7-3.3VAT: TO-220 Serial Digital Thermal Sensor a) TC74A0-5.0VAT: TO-220 Serial Digital Thermal Sensor b) TC74A1-5.0VAT: TO-220 Serial Digital Thermal Sensor c) TC74A2-5.0VAT: TO-220 Serial Digital Thermal Sensor d) TC74A3-5.0VAT: TO-220 Serial Digital Thermal Sensor e) TC74A4-5.0VAT: TO-220 Serial Digital Thermal Sensor f) TC74A5-5.0VAT: TO-220 Serial Digital Thermal Sensor * g) TC74A6-5.0VAT: TO-220 Serial Digital Thermal Sensor h) TC74A7-5.0VAT: TO-220 Serial Digital Thermal Sensor * Default Address = TO-220-5 Sales and Support Data Sheets Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and recommended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following: 1. 2. Your local Microchip sales office The Microchip Worldwide Site (www.microchip.com) Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using. New Customer Notification System Register on our web site (www.microchip.com/cn) to receive the most current information on our products. 2001-2012 Microchip Technology Inc. DS21462D-page15 TC74 NOTES: DS21462D-page 16 2001-2012 Microchip Technology Inc. Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. • There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data Sheets. Most likely, the person doing so is engaged in theft of intellectual property. • Microchip is willing to work with the customer who is concerned about the integrity of their code. • Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as “unbreakable.” Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act. Information contained in this publication regarding device applications and the like is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life support and/or safety applications is entirely at the buyer’s risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights. Trademarks The Microchip name and logo, the Microchip logo, dsPIC, FlashFlex, KEELOQ, KEELOQ logo, MPLAB, PIC, PICmicro, PICSTART, PIC32 logo, rfPIC, SST, SST Logo, SuperFlash and UNI/O are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. FilterLab, Hampshire, HI-TECH C, Linear Active Thermistor, MTP, SEEVAL and The Embedded Control Solutions Company are registered trademarks of Microchip Technology Incorporated in the U.S.A. Silicon Storage Technology is a registered trademark of Microchip Technology Inc. in other countries. Analog-for-the-Digital Age, Application Maestro, BodyCom, chipKIT, chipKIT logo, CodeGuard, dsPICDEM, dsPICDEM.net, dsPICworks, dsSPEAK, ECAN, ECONOMONITOR, FanSense, HI-TIDE, In-Circuit Serial Programming, ICSP, Mindi, MiWi, MPASM, MPF, MPLAB Certified logo, MPLIB, MPLINK, mTouch, Omniscient Code Generation, PICC, PICC-18, PICDEM, PICDEM.net, PICkit, PICtail, REAL ICE, rfLAB, Select Mode, SQI, Serial Quad I/O, Total Endurance, TSHARC, UniWinDriver, WiperLock, ZENA and Z-Scale are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. GestIC and ULPP are registered trademarks of Microchip Technology Germany II GmbH & Co. & KG, a subsidiary of Microchip Technology Inc., in other countries. All other trademarks mentioned herein are property of their respective companies. © 2001-2012, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. Printed on recycled paper. ISBN: 9781620768396 QUALITY MANAGEMENT SYSTEM CERTIFIED BY DNV == ISO/TS 16949 == 2001-2012 Microchip Technology Inc. Microchip received ISO/TS-16949:2009 certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona; Gresham, Oregon and design centers in California and India. The Company’s quality system processes and procedures are for its PIC® MCUs and dsPIC® DSCs, KEELOQ® code hopping devices, Serial EEPROMs, microperipherals, nonvolatile memory and analog products. In addition, Microchip’s quality system for the design and manufacture of development systems is ISO 9001:2000 certified. DS21462D-page 17 Worldwide Sales and Service AMERICAS ASIA/PACIFIC ASIA/PACIFIC EUROPE Corporate Office 2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7200 Fax: 480-792-7277 Technical Support: http://www.microchip.com/ support Web Address: www.microchip.com Asia Pacific Office Suites 3707-14, 37th Floor Tower 6, The Gateway Harbour City, Kowloon Hong Kong Tel: 852-2401-1200 Fax: 852-2401-3431 India - Bangalore Tel: 91-80-3090-4444 Fax: 91-80-3090-4123 India - New Delhi Tel: 91-11-4160-8631 Fax: 91-11-4160-8632 Austria - Wels Tel: 43-7242-2244-39 Fax: 43-7242-2244-393 Denmark - Copenhagen Tel: 45-4450-2828 Fax: 45-4485-2829 India - Pune Tel: 91-20-2566-1512 Fax: 91-20-2566-1513 France - Paris Tel: 33-1-69-53-63-20 Fax: 33-1-69-30-90-79 Japan - Osaka Tel: 81-6-6152-7160 Fax: 81-6-6152-9310 Germany - Munich Tel: 49-89-627-144-0 Fax: 49-89-627-144-44 Atlanta Duluth, GA Tel: 678-957-9614 Fax: 678-957-1455 Boston Westborough, MA Tel: 774-760-0087 Fax: 774-760-0088 Chicago Itasca, IL Tel: 630-285-0071 Fax: 630-285-0075 Cleveland Independence, OH Tel: 216-447-0464 Fax: 216-447-0643 Dallas Addison, TX Tel: 972-818-7423 Fax: 972-818-2924 Detroit Farmington Hills, MI Tel: 248-538-2250 Fax: 248-538-2260 Indianapolis Noblesville, IN Tel: 317-773-8323 Fax: 317-773-5453 Los Angeles Mission Viejo, CA Tel: 949-462-9523 Fax: 949-462-9608 Santa Clara Santa Clara, CA Tel: 408-961-6444 Fax: 408-961-6445 Toronto Mississauga, Ontario, Canada Tel: 905-673-0699 Fax: 905-673-6509 Australia - Sydney Tel: 61-2-9868-6733 Fax: 61-2-9868-6755 China - Beijing Tel: 86-10-8569-7000 Fax: 86-10-8528-2104 China - Chengdu Tel: 86-28-8665-5511 Fax: 86-28-8665-7889 China - Chongqing Tel: 86-23-8980-9588 Fax: 86-23-8980-9500 Netherlands - Drunen Tel: 31-416-690399 Fax: 31-416-690340 Korea - Daegu Tel: 82-53-744-4301 Fax: 82-53-744-4302 Spain - Madrid Tel: 34-91-708-08-90 Fax: 34-91-708-08-91 China - Hangzhou Tel: 86-571-2819-3187 Fax: 86-571-2819-3189 Korea - Seoul Tel: 82-2-554-7200 Fax: 82-2-558-5932 or 82-2-558-5934 China - Hong Kong SAR Tel: 852-2943-5100 Fax: 852-2401-3431 Malaysia - Kuala Lumpur Tel: 60-3-6201-9857 Fax: 60-3-6201-9859 China - Nanjing Tel: 86-25-8473-2460 Fax: 86-25-8473-2470 Malaysia - Penang Tel: 60-4-227-8870 Fax: 60-4-227-4068 China - Qingdao Tel: 86-532-8502-7355 Fax: 86-532-8502-7205 Philippines - Manila Tel: 63-2-634-9065 Fax: 63-2-634-9069 China - Shanghai Tel: 86-21-5407-5533 Fax: 86-21-5407-5066 Singapore Tel: 65-6334-8870 Fax: 65-6334-8850 China - Shenyang Tel: 86-24-2334-2829 Fax: 86-24-2334-2393 Taiwan - Hsin Chu Tel: 886-3-5778-366 Fax: 886-3-5770-955 China - Shenzhen Tel: 86-755-8864-2200 Fax: 86-755-8203-1760 Taiwan - Kaohsiung Tel: 886-7-213-7828 Fax: 886-7-330-9305 China - Wuhan Tel: 86-27-5980-5300 Fax: 86-27-5980-5118 Taiwan - Taipei Tel: 886-2-2508-8600 Fax: 886-2-2508-0102 China - Xian Tel: 86-29-8833-7252 Fax: 86-29-8833-7256 Thailand - Bangkok Tel: 66-2-694-1351 Fax: 66-2-694-1350 UK - Wokingham Tel: 44-118-921-5869 Fax: 44-118-921-5820 China - Xiamen Tel: 86-592-2388138 Fax: 86-592-2388130 China - Zhuhai Tel: 86-756-3210040 Fax: 86-756-3210049 DS21462D-page 18 Italy - Milan Tel: 39-0331-742611 Fax: 39-0331-466781 Japan - Tokyo Tel: 81-3-6880- 3770 Fax: 81-3-6880-3771 11/29/12 2001-2012 Microchip Technology Inc.