MIC284 Micrel Semiconductor, MIC284 Datasheet
MIC284
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MIC284 Summary of contents
Page 1
... A programmable address pin permits two devices to share the bus. (Alternate base addresses avail- able-contact Micrel.) Superior performance, low power and small size makes the MIC284 an excellent choice for the most demanding thermal management applications. *SMBus and Pentium III are trademarks of Intel Corporation. ...
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... Digital Output: Open-drain. Interrupt or thermostat output. Ground: Power and signal return for all IC functions. Digital Output: Open-Drain. Over-temperature indication Analog Input: Connection to remote temperature sensor (diode junction) Digital Input: Slave address selection input. See Table 1. MIC284 Slave Address Settings. Analog Input: Power supply input to the IC. 2 ...
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... Max 350 750 or GND 3 or GND 1 200 2.0 250 ±1 ±2 ±1 ±2 50 100 160 224 400 7.5 14 2.0 10 ±0.01 Micrel Units µA µA µA 10 µs 2 ± °C 2 ± °C 3 ± °C 3 ± ° µA µA 0 ± µA 1 MIC284 ...
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... CLK (Clock) Period 1 t Data In Setup Time to CLK High 2 t Data Out Stable After CLK Low 3 t DATA Low Setup Time to CLK Low 4 t DATA High Hold Time 5 After CLK High MIC284 Condition I = 3mA 6mA OL 2.7V ≤ V ≤ 5.5V DD 2.7V ≤ V ≤ 5.5V DD 2.7V ≤ V ≤ ...
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... Testing is performed using a single unit of one of the transistors listed in Table 6. D Note 6. Current into this pin will result in self-heating of the MIC284. Sink current should be minimized for best accuracy. Note 7. Guaranteed by design over the operating temperature range. Not 100% production tested. ...
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... Each MIC284 will only respond to its own unique slave address, allowing up to eight MIC284s to share a single bus. A match between the MIC284’s address and the address specified in the serial bit stream must be made to initiate communication. A0 should be tied directly to VDD or ground. See " ...
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... A new start bit must then be sent to the MIC284, followed by a repeat of the slave address with the R/W bit (LSB) set to the high (read) state. The data to be read from the part may then be clocked out ...
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... Table 2. MIC284 Register Addresses ...
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... MIC284 September 29, 2000 9 Micrel MIC284 ...
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... MIC284 MIC284 10 Micrel September 29, 2000 ...
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... ADC is interrupted by a serial bus transaction, it will restart the conversion that was interrupted and then continue in the normal sequence. This sequence will repeat indefinitely until the MIC284 is shut down, powered off interrupted by a serial bus transaction as described above. Power-On When power is initially applied, the MIC284’s internal regis- ters are set to their default states, and A0 is read to establish the device’ ...
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... Assuming the MIC284 is in interrupt mode and interrupts are enabled, there are five different conditions that will cause the MIC284 to set one of the status bits (S0, S1, or CRIT1) in CONFIG and assert the /INT output and/or the /CRIT output. These conditions are listed in Table 5. When a temperature event occurs, the corresponding status bit will be set in CONFIG ...
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... Table 5. MIC284 Temperature Events ...
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... Fault_Queue depth = 1 • interrupts enabled. • no temperature events pending CONFIG Command Byte Value: 0000 0001 * Following the first Fault_Queue conversions, one or more of the status bits may be set. MIC284 ...
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... See "Temperature Data Format" for more details See "Temperature Data Format" for more details. b Micrel MIC284 ...
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... T_HYST1 Command Byte Value: 0001 0010 Remote Temperature Setpoint Register T_SET1 Power-Up Value: 0110 0001 T_SET1 Command Byte Value: 0001 0011 MIC284 ...
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... See "Temperature Data Format" for more details See "Temperature Data Format" for more details. b Micrel MIC284 ...
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... Filter Capacitor Selection It is sometimes desirable to use a filter capacitor between the T1 and GND pins of the MIC284. The use of this capacitor is recommended in environments with a lot of high frequency noise (such as digital switching noise long wires are used to attach to the remote diode ...
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... Layout Considerations The following guidelines should be kept in mind when design- ing and laying out circuits using the MIC284: 1. Place the MIC284 as close to the remote diode as possible, while taking care to avoid severe noise sources such as high frequency power transformers, CRTs, memory and data busses, and the like ...
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... This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc. MIC284 MAX) PIN 1 ...