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TC74 Datenblatt(PDF) 2 Page - Microchip Technology

Teilenummer TC74
Bauteilbeschribung  Tiny Serial Digital Thermal Sensor
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Hersteller  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

TC74 Datenblatt(HTML) 2 Page - Microchip Technology

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TC74
DS21462D-page 2
 2001-2012 Microchip Technology Inc.
1.0
ELECTRICAL
CHARACTERISTICS
1.1
Absolute Maximum Ratings†
Supply Voltage (VDD) ............................................ +6V
Voltage On Any Pin ....... (GND – 0.3V) to (VDD + 0.3V)
Current On Any Pin ..........................................±50 mA
Operating Temperature (TA) ........ -40°C  TA  +125°C
Storage Temperature (TSTG) ..............-65°C to +150°C
Junction Temperature (TJ)................................ +150°C
† Notice: Stresses above those listed under "Maximum
Ratings" may cause permanent damage to the device.
This is a stress rating only and functional operation of
the device at those or any other conditions above those
indicated in the operation listings of this specification is
not implied. Exposure to maximum rating conditions for
extended periods may affect device reliability.
DC CHARACTERISTICS
Electrical Specifications: Unless otherwise noted, VDD = 3.3V for TC74AX-3.3VXX and
VDD = 5.0V for TC74AX-5.0VXX, -40°C  TA  125°C. Note 5
Parameters
Sym
Min
Typ
Max
Units
Conditions
Power Supply
Power-on Reset Threshold
VPOR
1.2
2.2
V
VDD Falling Edge or Rising
Edge
Supply Voltage
VDD
2.7
5.5
V
Note 5
Operating Current
IDD
200
350
µA
VDD = 5.5V, Note 1
Standby Supply Current
IDD-STANDBY
5.0
10
µA
VDD = 3.3V
Serial Port Inactive, Note 4
Temperature-to-Bits Converter
Temperature Accuracy
TERR
-2.0
-3.0
±2.0
+2.0
+3.0
°C
+25°C <TA < +85°C
0°C < TA < +125°C
-40°C < TA < 0°C
Conversion Rate
CR
4
8
SPS
Note 2
Serial Port Interface
Logic Input High
VIH
0.8 x VDD
——
V
Logic Input Low
VIL
0.2 x VDD
V
SDA Output Low
VOL
0.4
0.6
V
V
IOL = 3 mA
IOL = 6 mA, Note 3
Input Capacitance SDA, SCLK
CIN
—5.0
pF
I/O Leakage
ILEAK
-1.0
0.1
1.0
µA
Serial Port AC Timing (CLOAD = 80 pF)
SMBus/I2C Clock Frequency
fSMB
10
100
kHz
Low Clock Period
tLOW
4.7
µsec
10% to 10%
High Clock Period
tHIGH
4.0
µsec
90% to 90%
SMBus/I2C Rise Time
SMBus/I2C Fall Time
tR
tF
1000
300
nsec
nsec
10% to 90%
90% to10%
Note 1: Operating current is an average value integrated over multiple conversion cycles. Transient current may
exceed this specification.
2: Maximum ensured conversion time after Power-on Reset (POR to DATA_RDY) is 250 msec.
3: Output current should be minimized for best temperature accuracy. Power dissipation within the TC74 will
cause self-heating and temperature drift error.
4: SDA and SCLK must be connected to VDD or GND.
5: VDD = 3.3V for TC74AX -3.3 VXX. VDD = 5.0V for TC74AX -5.0 VXX. All part types of the TC74 will operate
properly over the wider power supply range of 2.7V to 5.5V. Each part type is tested and specified for rated
accuracy at its nominal supply voltage. As VDD varies from the nominal value, accuracy will degrade 1°C/V
of VDD change.


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