MCP98243-BE/ST Microchip Technology, MCP98243-BE/ST Datasheet - Page 32

• Manufacturer Part Number: MCP98243-BE/ST
• Description: IC TEMP SENSOR 3V 2WIRE 8-TSSOP
• Manufacturer: Microchip Technology

Specifications of MCP98243-BE/ST

• Package / Case: 8-TSSOP
• Output Type: I²C™/SMBus™
• Function: Temp Monitoring System (Sensor)
• Topology: ADC (Sigma Delta), Register Bank
• Sensor Type: Internal
• Sensing Temperature: -40°C ~ 125°C
• Output Alarm: No
• Output Fan: Yes
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Temperature Threshold: + 125 C
• Full Temp Accuracy: 1 C
• Digital Output - Bus Interface: 2-Wire, SMBus, I2C
• Digital Output - Number Of Bits: 8 bit
• Supply Voltage (max): 6 V
• Supply Voltage (min): 1.8 V
• Description/function: Thermal Management ICs
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Supply Current: 100 uA to 1100 uA
• Ic Output Type: Digital
• Sensing Accuracy Range: ± 0.5°C
• Temperature Sensing Range: -40°C To +125°C
• Supply Voltage Range: 2.7V To 5.5V
• Sensor Case Style: TSSOP
• No. Of Pins: 8
• Rohs Compliant: Yes
• Resolution (bits): 8bit
• Supply Voltage Min: 3V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

MCP9843/98243
5.2
5.2.1
Shutdown
activities (including temperature sampling operations)
while leaving the serial interface active. This mode is
selected by setting bit 8 of CONFIG to ‘1’. In this mode,
the device consumes I
until bit 8 is cleared ‘0’ to enable Continuous
Conversion mode, or until power is recycled.
The Shutdown bit (bit 8) cannot be set to ‘1’ while bits
6 and 7 of CONFIG (Lock bits) are set to ‘1’. However,
it can be cleared ‘0’ or returned to Continuous
Conversion while locked.
In Shutdown mode, all registers can be read or written.
However, the serial bus activity increases the shutdown
current.
If the device is shutdown while the Event pin is
asserted, then the Event output will be de-asserted
during shutdown. It will remain de-asserted until the
device is enabled for normal operation. Once the
device is enabled it takes tCONV before the device
re-asserts the Event output.
5.2.2
A hysteresis of 0°C, 1.5°C, 3°C or 6°C can be selected
for the T
boundaries using bits 10 and 9 of CONFIG. The
hysteresis applies for decreasing temperature only (hot
to cold), or as temperature drifts below the specified
limit.
The hysteresis bits can not be changed if either of the
lock bits, bits 6 and 7 of CONFIG, are set to ‘1’.
The T
are described graphically in
5.2.3
The Event output can be enabled using bit 3 of
CONFIG (Event output control bit) and can be
configured as either a comparator output or as Interrupt
Output mode using bit 0 of CONFIG (Event mode). The
polarity can also be specified as an active-high or
active-low using bit 1 of CONFIG (Event polarity).
When active-high output is selected, a pull-down
resistor is requried on the Event pin. When active-low
output is selected, a pull-up resistor is required on the
Event
graphical circuit description. These configurations are
designed to serve processors with Low-to-High or
High-to-Low edge triggered inputs. With these
configurations, when the Event output De-asserts,
power will not be dissipated across the pull-up or
pull-down resistors.
DS22153C-page 32
UPPER
SENSOR FEATURE DESCRIPTION
pin, see
UPPER
SHUTDOWN MODE
TEMPERATURE HYSTERESIS
(T
EVENT OUTPUT CONFIGURATION
, T
mode
HYST
LOWER
, T
)
Figure 5-10
disables
LOWER
and T
SHDN
Figure
. It remains in this mode
CRIT
and T
all
and
boundary conditions
5-2.
power-consuming
CRIT
Figure 5-11
temperate
for
When the ambient temperature increases above the
critical temperature limit, the Event output is forced to a
comparator output (regardless of bit 0 of CONFIG).
When the temperature drifts below the critical
temperature limit minus hysteresis, the Event output
automatically returns to the state specified by bit 0 of
CONFIG.
FIGURE 5-10:
Configuration.
FIGURE 5-11:
Configuration.
The status of the Event output can be read using bit 4
of CONFIG (Event status). This bit can not be set to ‘1’
in shutdown mode.
Bit 7 and 6 of the CONFIG register can be used to lock
the T
prevent false triggers at the Event output due to an
accidental rewrite to these registers.
The Event output can also be used as a critical
temperature output using bit 2 of CONFIG (critical
output only). When this feature is selected, the Event
output becomes a comparator output. In this mode, the
interrupt output configuration (bit 0 of CONFIG) is
ignored.
Event Output
UPPER
Event Output
, T
LOWER
V
DD
R
R
PD
PU
Active-Low Event Output
and T
Active-High Event Output
© 2009 Microchip Technology Inc.
CRIT
MCP9843/98243
MCP9843/98243
V
registers. The bits
DD