tcn75a Microchip Technology Inc., tcn75a Datasheet
tcn75a
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tcn75a Summary of contents
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... Shutdown) modes and the specification of both temperature alert output and hysteresis limits. When the temperature changes beyond the specified limits, the TCN75A outputs an alert signal. The user has the option of setting the alert output signal polarity as an active-low or active-high comparator output for thermo- stat operation temperature event interrupt output for microprocessor-based systems ...
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... TCN75A 1.0 ELECTRICAL CHARACTERISTICS Absolute Maximum Ratings † V ....................................................................... 6.0V DD Voltage at all Input/Output pins .... GND – 0.3V to 5.5V Storage temperature ..........................-65°C to +150°C Ambient temp. with power applied .....-55°C to +125°C Junction Temperature (T ).................................. 150°C J ESD protection on all pins (HBM:MM)....... (4 kV:400V) Latch-up current at each pin ......................... ±200 mA ...
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... Sym Min Typ Max T -40 — +125 A T -40 — +125 A T -65 — +150 A θ — 163 — JA θ — 206 — exceed Maximum Junction Temperature (+150°C). J TCN75A Conditions = 0.6V OUTPUT Units Conditions °C Note 1 °C °C °C/W °C/W DS21935C-page 3 ...
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... TCN75A SERIAL INTERFACE TIMING SPECIFICATIONS (NOTE 1) Electrical Specifications: Unless otherwise indicated and all limits measured to 50% point. L Parameters Sym 2 2-Wire I C™ Compatible Interface Serial Port Frequency f Clock Period t Low Clock t LOW High Clock t HIGH Rise Time Fall Time ...
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... FIGURE 2-5: Temperature 3.3V DD 160 Devices 0.8 0.6 0.4 0 105 125 -55 -35 -15 FIGURE 2-6: = 3.3V. Ambient Temperature. DD TCN75A = +25°C 5 lots = 3.3V 32 Samples/lot 160 Devices Temperature Accuracy (°C) Temperature Accuracy = +25° 105 125 T (°C) A Supply Current vs. Ambient ...
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... Average of 10 samples per package 125 = 5.5V DD 105 = 3. 2. 105 125 -2 vs. FIGURE 2-9: OL vs. Time 105 125 SOIC MSOP 27°C (Air) to 125°C (Oil bath Time (s) TCN75A Thermal Response © 2006 Microchip Technology Inc. ...
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... Address Select Pin (bit 2) Address Select Pin (bit 1) Address Select Pin (bit 0) Power Supply Input 3.5 ALERT Output The TCN75A’s ALERT pin is an open-drain output. The device outputs an alert signal when the ambient temperature goes beyond the user-programmed temperature limit. 3.6 Address Pins (A2, A1, A0) A2, A1 and A0 are device or slave address input pins ...
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... GND ‘0’. The 7-bit address transmitted in the serial bit stream must match the selected address for the TCN75A to respond with an ACK. Bit 8 in the address byte is a read/write bit. Setting this bit to ‘1’ commands a read operation, while ‘0’ commands a write operation (see Figure 4-1) ...
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... SDA Start Address Slave R/W Code Address TCN75A Response FIGURE 4-1: Device Addressing. 4.1.5 DATA VALID After the Start condition, each bit of data in transmission needs to be settled for a time specified by t before SCL toggles from low-to-high (see SU-DATA “Sensor And EEPROM Serial Interface Timing Specifications” ...
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... Pointer Interface FIGURE 5-1: Functional Block Diagram. DS21935C-page 10 5.1 Temperature Sensor The TCN75A uses the difference in the base-emitter voltage of a transistor while its collector current is changed from IC depends only on the ratio of the two currents and the ambient temperature, as shown in Equation 5-1. EQUATION 5-1: Δ 0.5°C Where: 0.25° ...
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... These registers are described in further detail in the following sections. The registers are accessed by sending register pointers to the TCN75A using the serial interface. This is an 8-bit pointer. However, the two Least Significant bits (LSbs) are used as pointers and all other bits need to be cleared < ...
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... TCN75A TABLE 5-1: BIT ASSIGNMENT SUMMARY FOR ALL REGISTERS Register MSB/ Pointer LSB Ambient Temperature Register ( MSB Sign 2 ° LSB 2 °C 2 °C Sensor Configuration Register (CONFIG LSB One-Shot Temperature Hysteresis Register (T HYST MSB Sign 2 °C ...
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... AMBIENT TEMPERATURE REGISTER ( The TCN75A has a 16-bit read-only Ambient Temperature register that contains 9-bit to 12-bit temperature data. (0.5°C to 0.0625°C resolutions, respecively). This data is formatted complement. The bit assignments, as well as the corresponding resolution, is shown in the register assignment below. The refresh rate of this register depends on the selected ADC resolution ...
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... MSB Data Master TCN75A Note not necessary to select the register pointer if it was set from the previous read/write. (see Section 4.1. ...
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... SENSOR CONFIGURATION REGISTER (CONFIG) The TCN75A has an 8-bit read/write Configuration register that allows the user to select the different features. These features include shutdown, ALERT output select as comparator or interrupt output, ALERT output polarity, fault queue cycle, temperature measurement resolution and One-shot mode (single conversion while in shutdown) ...
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... P K MSB Data TCN75A CONFIG Pointer TCN75A TCN75A Data TCN75A Note not necessary to ...
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... TEMPERATURE HYSTERESIS REGISTER (T ) HYST The TCN75A has a 16-bit read/write Temperature Hysteresis register that contains a 9-bit data in two’s compliment format. This register is used to set a hysteresis for the T limit. Therefore, the data SET represents a minimum temperature limit. If the ambient temperature drifts below the specified limit, the ...
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... K MSB Data TCN75A Pointer HYST TCN75A TCN75A MSB Data Master TCN75A < >b . 0101 1111 0000 0000 8 A ...
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... SET two’s compliment format. This data represents a maxi- mum temperature limit. If the ambient temperature exceeds this specified limit, the TCN75A asserts an alert output. (Refer to Section 5.3.4.3 “ALERT Output Configuration”). This register uses the nine Most Significant bits (MSbs) and all other bits are “ ...
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... K MSB Data TCN75A Pointer SET TCN75A TCN75A MSB Data Master TCN75A > ...
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... One-Shot Mode The TCN75A can also be used in a One-shot mode that can be selected using bit 7 of the CONFIG register. The One-shot mode performs a single temperature measurement and returns to Shutdown mode. This ...
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... HYST A T SET T HYST Pointer CONFIG At power-up, the TCN75A has an inherent 2 ms (typ.) power-up delay before updating the registers with default values and start a conversion cycle. This delay reduces register corruption due to unsettled power. After power-up, it takes t update the (typ.) ...
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... FIGURE 6-1: Pull-up Resistors On Serial Interface. The TCN75A is designed to meet 0.4V (max.) voltage drop current. This allows the TCN75A to drive lower values of pull-up resistors and higher bus capacitance. In this application, all devices on the bus must meet the same pull-down current requirements. ...
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... 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. DS21935C-page 24 Example: N75A/E 645256 Example: TCN75AV OA^^0645 e 3 256 ) e 3 © 2006 Microchip Technology Inc. ...
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... Microchip Technology Inc Units MILLIMETERS Dimension Limits MIN NOM N 8 0.65 BSC e — — 0.75 0.85 A1 0.00 — E 4.90 BSC 3.00 BSC E1 3.00 BSC D L 0.40 0.60 L1 0.95 REF ϕ 0° — 0.08 — 0.22 — Microchip Technology Drawing No. C04–111, Sept. 8, 2006 TCN75A ϕ L MAX 1.10 0.95 0.15 0.80 8° 0.23 0.40 DS21935C-page 25 ...
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... TCN75A 8-Lead Plastic Small Outline (OA) – Narrow, 150 mil Body (SOIC) Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging 45° c β Units Dimension Limits n Number of Pins p Pitch Overall Height A Molded Package Thickness ...
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... Added disclaimers to package outline drawings • Updated package marking information for pb-free markings. Revision B (May 2006) • Revised Product ID System; Added OA713 and UA713 packages. Revision A (January 2005) • Original release of this document. © 2006 Microchip Technology Inc. TCN75A DS21935C-page 27 ...
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... TCN75A NOTES: DS21935C-page 28 © 2006 Microchip Technology Inc. ...
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... Plastic Micro Small Outline (MSOP), 8-lead UA713 = Plastic Micro Small Outline (MSOP), 8-lead Tape & Reel © 2006 Microchip Technology Inc. TCN75A . Examples: a) TCN75AVOA: 8LD SOIC package. b) TCN75AVOA713: Tape and Reel, 8LD SOIC package. a) TCN75AVUA: 8LD MSOP package. b) TCN75AVUA713: Tape and Reel, 8LD MSOP package. DS21935C-page 29 ...
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... TCN75A NOTES: DS21935C-page 30 © 2006 Microchip Technology Inc. ...
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... 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. © 2006 Microchip Technology Inc. Trademarks The Microchip name and logo, the Microchip logo, Accuron, dsPIC, K ...
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