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NCT275AFCT2G

P1-P3P4-P6P7-P9P10-P12P13-P13
© Semiconductor Components Industries, LLC, 2014
August, 2014 ï Rev. 0
1 Publication Order Number:
NCT275/D
NCT275
Industry Standard Digital
Temperature Sensor in CSP
Package with 2-wire
Interface
The NCT275 is a twoïwire serially programmable temperature
sensor with an overïtemperature/interrupt output pin to signal out of
limit conditions. This is an openïdrain pin and can operate in either
comparator or interrupt mode. Temperature measurements are
converted into digital form using a high resolution (12 bit),
sigmaïdelta, analogïtoïdigital converter (ADC). The device operates
over the –55°C to +125°C temperature range.
Communication with the NCT275 is accomplished via the
SMBus/I
2
C interface which is compatible with industry standard
protocols. Through this interface the NCT275s internal registers may
be accessed. These registers allow the user to read the current
temperature, change the configuration settings and adjust the
temperature limits.
The NCT275 has a wide supply voltage range of 3.0 V to 5.5 V. The
average supply current is 575 mA at 3.3 V. It also offers a shutdown
mode to conserve power. The typical shutdown current is 3 mA.
The NCT275 is available in a space saving 6 ball CSP package as
NCT275A and NCT275B. NCT275B gives I
2
C address options of
0x48 and 0x4A while NCT275A gives address options of 0x49 and
0x4B. NCT275 is also fully register compatible with the NCT75,
LM75 and TMP75.
Features
• 12ïbit TemperatureïtoïDigital Converter
• Input Voltage Range from 3.0 V to 5.5 V
• Temperature Range from ï55°C to +125°C
• SMBus/I
2
C Interface
• Over Temperature Indicator
• Support for SMBus ALERT
• Shutdown Mode for Low Power Consumption
• OneïShot Mode
• Available in 6 Ball CSP Package with Multiple Address Options
• These are PbïFree Devices
Typical Applications
• Computer Thermal Monitoring
• Thermal Protection
• Isolated Sensors
• Battery Management
• Office Electronics
• Electronic Test Equipment
• Thermostat Controls
• System Thermal Management
MARKING
DIAGRAM
http://onsemi.com
See detailed ordering and shipping information ion page 12 of
this data sheet.
ORDERING INFORMATION
WLCSP6
CASE 567JR
PIN CONNECTIONS
XXX = 75A (NCT275A)
= 75B (NCT275B)
A = Assembly Location
Y= Year
W = Work Week
G = PbïFree Package
XXX
AYW
G
SDA
SCL
OS/ALERT
V
DD
A1
GND
A1
B1
C1
A2
B2
C2
V
DD
A1
GND
SDA
SCL
OS/ALERT
(Bottom View)
(Top View)
NCT275
NCT275
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2
Figure 1. Simplified Block Diagram
V
DD
TWO-WIRE
INTERFACE
DELTA-SIGMA
ADC
CONTROL
LOGIC
REGISTERS
CONFIGURATION
TEMPERATURE
ONE-SHOT
T
HYST
T
OS
OS/ALERT
GND
SDA
SCL
A1
Figure 2. Typical Application Circuit
V
DD
3.0 V To 5.5 V
OS
/ALERT
GND
SDA
SCL
A1
C
BYPASS
ADDRESS
(SET AS DESIRED)
SERIAL INTERFACE
NOTE: SDA, SCL AND OS
/ALERT PINS
REQUIRE PULL-UP RESISTORS TO V
DD
NCT275
BALL FUNCTION DESCRIPTION
Ball Name Ball Function Description
A2 SDA SMBus/I
2
C Serial Biïdirectional Data Input/Output. Openïdrain pin; needs a pullïup resistor.
A1 V
DD
Positive Supply Voltage, 3.0 V to 5.5 V. Bypass to ground with a 0.1mF bypass capacitor.
B2 SCL Serial Clock Input. Openïdrain pin; needs a pullïup resistor.
B1 A1 SMBus/I
2
C Serial Bus Address Selection Pin. Connect to GND or V
DD
to set the desired I
2
C
address.
C2 OS/ALERT Overïtemperature Indicator. Openïdrain output; needs a pullup resistor.
C1 GND Power Supply Ground.
NCT275
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3
ABSOLUTE MAXIMUM RATINGS
Rating Symbol Value Unit
Supply Voltage V
DD
ï0.3 to +7 V
Input voltage on SCL, SDA, and A1. ï0.3 V to V
DD
+ 0.3 V V
Input current on SDA and A1. I
IN
ï1 to +50 mA
Maximum Junction Temperature T
J(max)
150.7 °C
Operating Temperature Range T
OP
ï55 to 125 °C
Storage Temperature Range T
STG
ï65 to 160 °C
ESD Capability, Human Body Model (Note 2) ESD
HBM
2000 V
ESD Capability, Machine Model (Note 2) ESD
MM
200 V
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
1. Refer to ELECTRICAL CHARACTERISTICS and APPLICATION INFORMATION for Safe Operating Area.
2. This device series incorporates ESD protection and is tested by the following methods:
ESD Human Body Model tested per AECïQ100ï002 (EIA/JESD22ïA114)
ESD Machine Model tested per AECïQ100ï003 (EIA/JESD22ïA115)
OPERATING RANGES (Note 3)
Rating
Symbol Min Max Unit
Operating Input Voltage V
in
3.0 5.5 V
Operating Ambient Temperature Range T
A
ï55 125 °C
Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond
the Recommended Operating Ranges limits may affect device reliability.
3. Refer to ELECTRICAL CHARACTERISTICS and APPLICATION INFORMATION for Safe Operating Area.
SMBUS TIMING SPECIFICATIONS
Parameter Symbol Test Conditions Min Typ Max Unit
Serial Clock Frequency f
SCL
DC ï 400 kHz
Start Condition Hold Time t
HD:STA
0.6 ï ï
ms
Stop Condition Setup Time t
SU:STO
90% of SCL to 10% of SDA 100 ï ï ns
Clock Low Period t
LOW
1.3 ï ï
ms
Clock High Period t
HIGH
O.6 ï ï
ms
Start Condition Setup Time t
SU:STA
90% of SCL to 90% of SDA 100 ï ï ns
Data Setup Time t
SU:DAT
10% of SDA to 10% of SCL 100 ï ï ns
Data Hold Time (Note 4) t
HD:DAT
10% of SCL to 10% of SDA 0 ï 76 ns
SDA/SCL Rise Time t
R
ï 300 ï ns
SDA/SCL Fall Time t
F
ï 300 ï ns
Minimum RESET Pulse Width t
RESET
1.3 ï ï
ms
Bus Free Time Between STOP and START
Conditions
t
BUF
1.3 ï ï
ms
4. This refers to the hold time when NCT275 is writing data to the bus
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NCT275AFCT2G

Mfr. #:
Buy NCT275AFCT2G
Manufacturer:
ON Semiconductor
Description:
Board Mount Temperature Sensors LOCAL TEMPERATURE SENSOR
Lifecycle:
New from this manufacturer.
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