MIC384-3BM Micrel Inc, MIC384-3BM Datasheet - Page 6

• Manufacturer Part Number: MIC384-3BM
• Description: IC SUPERVSR THERM LOC/REM 8SOIC
• Manufacturer: Micrel Inc

Specifications of MIC384-3BM

• Function: Temp Monitoring System (Sensor)
• Topology: ADC (Sigma Delta), Register Bank
• Sensor Type: External & Internal
• Sensing Temperature: -55°C ~ 125°C, External Sensor
• Output Type: I²C™/SMBus™
• Output Alarm: Yes
• Output Fan: No
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -55°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

MIC384
Functional Diagram
Functional Description
Pin Descriptions
VDD: Power supply input. See electrical specifica-
tions.
GND: Ground return for all MIC384 functions.
CLK: Clock input to the MIC384 from the two-wire serial
bus. The clock signal is provided by the host, and is
shared by all devices on the bus.
DATA: Serial data I/O pin that connects to the two-wire
serial bus. DATA is bi-directional and has an open-drain
output driver. An external pull-up resistor or current
source somewhere in the system is necessary on this
line. This line is shared by all devices on the bus.
A0: This inputs sets the least significant bit of the MIC384’s
7-bit slave address. The six most-significant bits are fixed and
are determined by the part number ordered. (See ordering
information table above.) Each MIC384 will only respond to
its own unique slave address, allowing up to eight MIC384’s to
share a single bus. A match between the MIC384’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 "Temperature Measurement and
MIC384
DATA
CLK
A0
T1
T2
MIC384
Reference
Serial Bus
Bandgap
Interface
Register
Sensor
Pointer
2-Wire
MUX
and
3:1
1-Bit
DAC
Configuration
Temperature
Temperature
Hysteresis
Registers
Registers
Registers
Setpoint
Register
Result
VDD
GND
6
Power On" for more information. A0 determines the slave
address as shown in Table 1:
/INT: Temperature events are indicated to external circuitry
via this output. Operation of the /INT output is controlled by
the MODE and IM bits in the MIC384’s configuration register.
See "Comparator and Interrupt Modes" below. This output
is open-drain and may be wire-OR’ed with other open-drain
signals. Most systems will require a pull-up resistor or current
source on this pin. If the IM bit in the configuration register
P
a
M
M
M
M
t r
C I
C I
C I
C I
N
3
3
3
3
u
8
8
8
8
m
Table 1. MIC384 Slave Address Settings
4
4
4
4
0 -
2 -
3 -
b
1 -
r e
Open-Drain
Output
Digital Filter
Comparator
8-Bit Sigma-Delta ADC
Machine
Control
Digital
n I
Logic
State
and
and
A
p
0
0
0
0
1
1
1
1
u
0
s t
/INT
1
1
1
1
1
1
1
1
M
0
0
0
0
0
0
0
0
B
0
0
0
0
0
0
0
0
C I
n i
1
1
1
1
1
1
1
1
3
a
0
0
0
0
1
1
1
1
8
y r
0
0
1
1
0
0
1
1
4
1
1
1
1
0
0
0
0
b
b
b
b
b
b
b
b
l S
v a
September 2005
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4
4
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4
4
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8
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Micrel