MICROCHIP TC74A2

TC74
Tiny Serial Digital Thermal Sensor
Features
General Description
• Digital Temperature Sensing in SOT-23-5 or
TO-220 Packages
• Outputs Temperature as an 8-Bit Digital Word
• Simple SMBus/I2C™ Serial Port Interface
• Solid-State Temperature Sensing:
- ±2°C (max.) Accuracy from +25°C to +85°C
- ±3°C (max.) Accuracy from 0°C to +125°C
• Supply Voltage of 2.7V to 5.5V
• Low Power:
- 200 µA (typ.) Operating Current
- 5 µA (typ.) Standby Mode Current
The TC74 is a serially accessible, digital temperature
sensor particularly suited for low cost and small formfactor applications. Temperature data is converted from
the onboard thermal sensing element and made
available as an 8-bit digital word.
Applications
• Thermal Protection for Hard Disk Drives
and other PC Peripherals
• PC Card Devices for Notebook Computers
• Low Cost Thermostat Controls
• Power Supplies
• Thermistor Replacement
Package Types
Communication with the TC74 is accomplished via a 2wire SMBus/I2C compatible serial port. This bus also
can be used to implement multi-drop/multi-zone
monitoring. The SHDN bit in the CONFIG register can
be used to activate the low power Standby mode.
Temperature resolution is 1°C. Conversion rate is a
nominal 8 samples/sec. During normal operation, the
quiescent current is 200 µA (typ). During standby
operation, the quiescent current is 5 µA (typ).
Small size, low installed cost and ease of use make the
TC74 an ideal choice for implementing thermal
management in a variety of systems.
Functional Block Diagram
Internal Sensor
(Diode)
TO-220
SOT-23
SCLK
SDA
SCLK
5
4
 Modulator
TC74
Control
Logic
TC74
12345
NC
SDA
GND
SCLK
VDD
SDA
Serial Port
Interface
1
2
3
NC
GND
VDD
Temperature
Register
Note: The TO-220 tab is connected
to pin 3 (GND)
 2001-2012 Microchip Technology Inc.
DS21462D-page 1
TC74
1.0
ELECTRICAL
CHARACTERISTICS
1.1
Absolute Maximum Ratings†
Supply Voltage (VDD) ............................................ +6V
Voltage On Any Pin ....... (GND – 0.3V) to (VDD + 0.3V)
† 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.
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
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-on Reset Threshold
VPOR
1.2
—
2.2
V
Supply Voltage
VDD
2.7
—
5.5
V
Note 5
Operating Current
IDD
—
200
350
µA
VDD = 5.5V, Note 1
IDD-STANDBY
—
5.0
10
µA
VDD = 3.3V
Serial Port Inactive, Note 4
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
CR
4
8
—
SPS
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
Power Supply
Standby Supply Current
VDD Falling Edge or Rising
Edge
Temperature-to-Bits Converter
Temperature Accuracy
Conversion Rate
Note 2
Serial Port Interface
Input Capacitance SDA, SCLK
IOL = 3 mA
IOL = 6 mA, Note 3
CIN
—
5.0
—
pF
ILEAK
-1.0
0.1
1.0
µA
fSMB
10
—
100
kHz
Low Clock Period
tLOW
4.7
—
—
µsec
10% to 10%
High Clock Period
tHIGH
4.0
—
—
µsec
90% to 90%
tR
tF
—
—
—
—
1000
300
nsec
nsec
10% to 90%
90% to10%
I/O Leakage
Serial Port AC Timing (CLOAD = 80 pF)
SMBus/I2C Clock Frequency
SMBus/I2
C Rise Time
SMBus/I2C Fall Time
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.
DS21462D-page 2
 2001-2012 Microchip Technology Inc.
TC74
DC CHARACTERISTICS (CONTINUED)
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
START Condition Setup Time
(for repeated START
Condition)
tSU(START)
4.0
—
—
µsec
START Condition Hold Time
tH(START)
4.0
—
—
µsec
Data In Setup Time
tSU-DATA
1000
—
—
nsec
Data In Hold Time
tH-DAT
1250
—
—
nsec
STOP Condition Setup Time
tSU(STOP)
4.0
—
—
µsec
Bus Free Time Prior to New
Transition
tIDLE
4.7
—
—
µsec
Power-on Reset Delay
tPOR
—
500
—
µsec
Conditions
90% SCLK to 10% SDA
VDD VPOR (Rising Edge)
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.
 2001-2012 Microchip Technology Inc.
DS21462D-page 3
TC74
SMBUS Read Timing Diagram
A
B
tLOW tHIGH
C
D
E F
G
H
I
K
J
SCLK
SDA
tSU(START) tH(START)
tSU-DATA
tSU(STOP)
E = Slave Pulls SDA Line Low
F = Acknowledge Bit Clocked into Master
G = MSB of Data Clocked into Master
H = LSB of Data Clocked into Master
A = Start Condition
B = MSB of Address Clocked into Slave
C = LSB of Address Clocked into Slave
D = R/W Bit Clocked into Slave
tIDLE
I = Acknowledge Clock Pulse
J = Stop Condition
K = New Start Condition
SMBUS Write Timing Diagram
A
B
tLOW tHIGH
C
D
E F
G
H
I J
K
L
M
SCLK
SDA
tSU(START) tH(START)
tSU-DATA
A = Start Condition
B = MSB of Address Clocked into Slave
C = LSB of Address Clocked into Slave
D = R/W Bit Clocked into Slave
E = Slave Pulls SDA Line Low
FIGURE 1-1:
DS21462D-page 4
tH-DATA
F = Acknowledge Bit Clocked into Master
G = MSB of Data Clocked into Slave
H = LSB of Data Clocked into Slave
I = Slave Pulls SDA Line Low
tSU(STOP) tIDLE
J = Acknowledge Clocked into Master
K = Acknowledge Clock Pulse
L = Stop Condition, Data Executed by Slave
M = New Start Condition
Timing Diagrams.
 2001-2012 Microchip Technology Inc.
TC74
2.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1:
2.1
PIN FUNCTION TABLE
Pin No.
(5-Pin
SOT-23)
Pin No.
(5-Pin TO-220)
Symbol
Type
Description
1
1
NC
None
No Internal Connection
2
3
GND
Power
System Ground
3
5
VDD
Power
Power Supply Input
4
4
SCLK
Input
SMBus/I2C Serial Clock
5
2
SDA
Bidirectional
SMBus/I2C Serial Data
Ground (GND)
Input. Ground return for all TC74 functions.
2.2
Power Supply Input (VDD)
Power supply input. See Electrical Specifications.
2.3
SMBus/I2C Serial Clock (SCLK)
Input. SMBus/I2C serial clock. Clocks data into and out
of the TC74. See System Management Bus
Specification, Rev. 1.0, for timing diagrams.
2.4
Serial Data (SDA)
Bidirectional. Serial data is transferred on the SMBus/
I2C in both directions using this pin. See System
Management Bus Specification, Rev. 1.0 for timing
diagrams.
 2001-2012 Microchip Technology Inc.
DS21462D-page 5
TC74
3.0
DETAILED DESCRIPTION
3.1
Functional Description
TABLE 3-2:
Term
SERIAL BUS CONVENTIONS
Explanation
Transmitter The device sending data to the bus.
The TC74 acquires and converts temperature
information from its onboard solid-state sensor with a
resolution of ±1°C. It stores the data in an internal
register which is then read through the serial port. The
system interface is a slave SMBus/I2C port, through
which temperature data can be read at any time. Eight
SMBus/I2C addresses are programmable for the TC74,
which allows for a multi-sensor configuration. Also,
there is low power Standby mode when temperature
acquisition is suspended.
Receiver
The device receiving data from the bus.
Master
The device which controls the bus initiating transfers (START), generating the
clock and terminating transfers
(STOP).
Slave
The device addressed by the master.
START
A unique condition signaling the beginning of a transfer indicated by SDA
falling (high-low) while SCLK is high.
3.1.1
STOP
A unique condition signaling the end of
a transfer indicated by SDA rising (lowhigh) while SCLK is high.
ACK
A Receiver acknowledges the receipt
of each byte with this unique condition.
The Receiver drives SDA low during
SCLK high of the ACK clock-pulse. The
Master provides the clock pulse for the
ACK cycle.
Busy
Communication is not possible
because the bus is in use.
NOT Busy
When the bus is idle, both SDA and
SCLK will remain high.
Data Valid
The state of SDA must remain stable
during the high period of SCLK in order
for a data bit to be considered valid.
SDA only changes state while SCLK is
low during normal data transfers (see
START and STOP conditions).
STANDBY MODE
The host is allowed, by the TC74, to put it into a low
power (IDD = 5 µA, typical) Standby mode. In this mode,
the A/D converter is halted and the temperature data
registers are frozen. The SMBus/I2C port, though,
operates normally. Standby mode is enabled by setting
the SHDN bit in the CONFIG register. Table 3-1
summarizes this operation.
TABLE 3-1:
STANDBY MODE OPERATION
SHDN Bit
Operating Mode
0
Normal
1
Standby
3.1.2
SMBUS/I2C SLAVE ADDRESS
The TC74 is internally programmed to have a default
SMBus/I2C address value of 1001 101b. Seven other
addresses are available by custom order (contact
Microchip Technology Inc.
3.2
Serial Port Operation
The Serial Clock input (SCLK) and bidirectional data
port (SDA) form a 2-wire bidirectional serial port for programming and interrogating the TC74. The
conventions used in this bus architecture are listed in
Table 3-2.
DS21462D-page 6
All transfers take place under the control of a host, usually a CPU or microcontroller, acting as the Master. This
host provides the clock signal for all transfers. The
TC74 always operates as a Slave. The serial protocol
is illustrated in Figure 3-1. All data transfers have two
phases and all bytes are transferred MSB first.
Accesses are initiated by a START condition, followed
by a device address byte and one or more data bytes.
The device address byte includes a Read/Write selection bit. Each access must be terminated by a STOP
condition. A convention called “Acknowledge” (ACK)
confirms receipt of each byte. Note that SDA can
change only during periods when SCLK is low (SDA
changes while SCLK is high are reserved for START
and STOP conditions).
 2001-2012 Microchip Technology Inc.
TC74
Write Byte Format
S
Address
WR
ACK
Command
7 Bits
ACK
Data
8 Bits
Slave Address
ACK
P
8 Bits
Command Byte: selects
which register you are
writing to.
Data Byte: data goes
into the register set
by the command byte.
Read Byte Format
S
Address
WR
ACK
Command
7 Bits
ACK
S
Address
8 Bits
Slave Address
RD
ACK
7 Bits
Command Byte: selects
which register you are
reading from.
Data
NACK
P
8 Bits
Slave Address: repeated
due to change in dataflow direction.
Data Byte: reads from
the register set by the
command byte.
Receive Byte Format
S
Address
RD
ACK
7 Bits
S = START Condition
P = STOP Condition
Shaded = Slave Transmission
FIGURE 3-1:
3.3
Data
NACK
Data Byte: reads data from
the register commanded by
the last Read Byte or Write
Byte transmission.
SMBus/I2C Protocols.
START Condition (S)
The TC74 continuously monitors the SDA and SCLK
lines for a START condition (a high-to-low transition of
SDA while SCLK is high) and will not respond until this
condition is met.
3.4
3.6
Data Byte
After a successful ACK of the address byte, the host
must transmit the data byte to be written, or clock-in the
data to be read (see the appropriate timing diagrams).
ACK will be generated upon a successful write of a data
byte into the TC74.
Address Byte
Immediately following the START condition, the host
must transmit the address byte to the TC74. The states
of A2, A1 and A0 determine the SMBus/I2C address for
the TC74. The 7-bit address transmitted in the serial bit
stream must match for the TC74 to respond with an
Acknowledge (indicating the TC74 is on the bus and
ready to accept data). The 8-bit in the address byte is a
Read/Write bit. This bit is a ‘1’ for a read operation or
‘0’ for a write operation. During the first phase of any
transfer, this bit will be set = 0, indicating that the
command byte is being written.
3.5
P
8 Bits
3.7
STOP Condition (P)
Communications must be terminated by a STOP
condition (a low-to-high transition of SDA while SCLK
is high). The STOP condition must be communicated
by the transmitter to the TC74. Refer to Figure 1-1,
“Timing Diagrams”, for serial bus timing.
Acknowledge (ACK)
Acknowledge (ACK) provides a positive handshake
between the host and the TC74. The host releases
SDA after transmitting 8 bits. The host then generates
a ninth clock cycle to allow the TC74 to pull the SDA
line low. This action acknowledges that the TC74
successfully received the previous 8 bits of data or
address.
 2001-2012 Microchip Technology Inc.
DS21462D-page 7
TC74
4.0
REGISTER SET AND
PROGRAMMER’S MODEL
TABLE 4-1:
COMMAND BYTE
DESCRIPTION
(SMBUS/I2C READ_BYTE AND
WRITE_BYTE)
TABLE 4-3:
TEMPERATURE REGISTER
(TEMP)
D[7]
D[6]
D[5]
D[4]
D[3]
D[2]
D[1]
D[0]
MSB
X
X
X
X
X
X
LSB
Command
Code
RTR
00h
Read Temperature (TEMP)
In temperature data registers, each unit value represents one degree (Celsius). The value is in 2’s
complement binary format such that a reading of 0000
0000b corresponds to 0°C. Examples of this
temperature to binary value relationship are shown in
Table 4-4.
RWCR
01h
Read/Write Configuration
(CONFIG)
TABLE 4-4:
TABLE 4-2:
Bit
POR
D[7]
0
D[6]
0
D[5]D[0]
0
Function
CONFIGURATION REGISTER
(CONFIG); 8 BITS, READ/
WRITE)
Actual
Temperature
Registered
Temperature
Binary
Hex
Operation
+130.00°C
+127°C
0111 1111
STANDBY
Switch
Read/ 1 = standby,
Write 0 = normal
+127.00°C
+127°C
0111 1111
+126.50°C
+126°C
0111 1110
Data Ready *
Read 1 = ready
Only 0 = not ready
+25.25°C
+25°C
0001 1001
+0.50°C
0°C
0000 0000
+0.25°C
0°C
0000 0000
0.00°C
0°C
0000 0000
-0.25°C
-1°C
1111 1111
-0.50°C
-1°C
1111 1111
-0.75°C
-1°C
1111 1111
-1.00°C
-1°C
1111 1111
-25.00°C
-25°C
1110 0111
-25.25°C
-26°C
1110 0110
-54.75°C
-55°C
1100 1001
-55.00°C
-55°C
1100 1001
-65.00°C
-65°C
1011 1111
Function
Reserved Always
returns zero
when read
Type
N/A
N/A
Note 1: *DATA_RDY bit RESET at power-up and
SHDN enable.
VDD
DATA_RDY
4.2
Register Set Summary
The TC74 register set is summarized in Table 4-5. All
registers are 8 bits wide.
SHDN
tconv
tconv
TABLE 4-5:
FIGURE 4-1:
DATA_RDY, SHDN
Operation Logic Diagram.
Name
4.1
Temperature Register (TEMP),
8 Bits, READ ONLY
The binary value (2’s complement format) in this register represents temperature of the onboard sensor
following a conversion cycle. The registers are
automatically updated in an alternating manner.
DS21462D-page 8
TEMPERATURE-TO-DIGITAL
VALUE CONVERSION
(TEMP)
TEMP
CONFIG
TC74 REGISTER SET
SUMMARY
Description
POR
State
Internal Sensor
0000
Temperature (2’s 0000b (1)
Complement)
CONFIG
Register
0000
0000b
Read Write

N/A


Note 1: The TEMP register will be immediately
updated by the A/D converter after the
DATA_RDY Bit goes high.
 2001-2012 Microchip Technology Inc.
TC74
5.0
PACKAGING INFORMATION
5.1
SOT23A Package Marking Information
5-Pin SOT-23A
5
4
1 & 2 = part number code + temp. range and voltage
3 = year and quarter code
1 2 3 4
1
4 = lot ID number
3
2
SOT-23 Package Marking Codes
SOT-23 (V)
Address
Code
SOT-23 (V)
Address
Code
TC74A0-3.3VCT
1001 000
V0
TC74A0-5.0VCT
1001 000
U0
TC74A1-3.3VCT
1001 001
V1
TC74A1-5.0VCT
1001 001
U1
TC74A2-3.3VCT
1001 010
V2
TC74A2-5.0VCT
1001 010
U2
TC74A3-3.3VCT
1001 011
V3
TC74A3-5.0VCT
1001 011
U3
TC74A4-3.3VCT
1001 100
V4
TC74A4-5.0VCT
1001 100
U4
TC74A5-3.3VCT
1001 101*
V5
TC74A5-5.0VCT
1001 101*
U5
TC74A6-3.3VCT
1001 110
V6
TC74A6-5.0VCT
1001 110
U6
TC74A7-3.3VCT
1001 111
V7
TC74A7-5.0VCT
1001 111
U7
Note:
* Default Address
TO-220 Package Marking Information
TO-220
Legend: XX...X
YY
WW
NNN
Note:
In the event the full Microchip part number cannot be
marked on one line, it will be carried over to the next line thus limiting the number of available characters for customer specific information.
TC74A03.3VAT
0229123
1
*
2
3
4
Customer specific information*
Year code (last 2 digits of calendar year)
Week code (week of January 1 is week ‘01’)
Alphanumeric traceability code
5
Standard marking consists of Microchip part number, year code, week code, and traceability code.
 2001-2012 Microchip Technology Inc.
DS21462D-page 9
TC74
5.2
Taping Forms
Component Taping Orientation for 5-Pin SOT-23A (EIAJ SC-74A) Devices
User Direction of Feed
Device
Marking
W
PIN 1
P
Standard Reel Component Orientation
for TR Suffix Device
(Mark Right Side Up)
Carrier Tape, Number of Components Per Reel and Reel Size:
Package
Carrier Width (W)
Pitch (P)
Part Per Full Reel
Reel Size
5-Pin SOT-23A
8 mm
4 mm
3000
7 in.
DS21462D-page 10
 2001-2012 Microchip Technology Inc.
TC74
5.3
Package Dimensions
Note:
For the most current package drawings, please see the Microchip Packaging Specification located
at http://www.microchip.com/packaging
SOT-23A-5
.075 (1.90)
REF.
.122 (3.10)
.098 (2.50)
.071 (1.80)
.059 (1.50)
.020 (0.50)
.012 (0.30)
PIN 1
.037 (0.95)
REF.
.118 (3.00)
.010 (2.80)
.057 (1.45)
.035 (0.90)
.010 (0.25)
.004 (0.09)
10° MAX.
.006 (0.15)
.000 (0.00)
.024 (0.60)
.004 (0.10)
Dimensions: inches (mm)
 2001-2012 Microchip Technology Inc.
DS21462D-page 11
TC74
Note:
For the most current package drawings, please see the Microchip Packaging Specification located
at http://www.microchip.com/packaging
5-Pin TO-220
.185 (4.70)
.165 (4.19)
.117 (2.97)
.103 (2.62)
.415 (10.54)
.390 (9.91)
.156 (3.96)
.140 (3.56)
DIA.
.055 (1.40)
.045 (1.14)
.293 (7.44)
.204 (5.18)
3 - 7.5
5 PLCS.
.613 (15.57)
.569 (14.45)
.037 (0.95)
.025 (0.64)
.590 (14.99)
.482 (12.24)
.025 (0.64)
.012 (0.30)
.072 (1.83)
.062 (1.57)
PIN 1
.273 (6.93)
.263 (6.68)
.115 (2.92)
.087 (2.21)
Dimensions: inches (mm)
DS21462D-page 12
 2001-2012 Microchip Technology Inc.
TC74
6.0
REVISION HISTORY
Revision D (December 2012)
Added a note to each package outline drawing.
 2001-2012 Microchip Technology Inc.
DS21462D-page 13
TC74
NOTES:
DS21462D-page 14
 2001-2012 Microchip Technology Inc.
TC74
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.
PART NO.
Device
XX
-XX
X
XX
Address Supply
Operating
Package
Options Voltage Temperature
Device:
TC74:
Address Options:
A0
A1
A2
A3
A4
A5
A6
A7
Serial Digital Thermal Sensor
=
=
=
=
=
=
=
=
1001
1001
1001
1001
1001
1001
1001
1001
000
001
010
011
100
101 *
110
111
* Default Address
Supply Voltage:
3.3
5.0
= Accuracy optimized for 3.3V
= Accuracy optimized for 5.0V
Operating Temperature: V = -40°C  TA  +125°C
Package:
a)
TC74A0-3.3VCTTR: SOT-23 Serial Digital Thermal Sensor
b)
TC74A1-3.3VCTTR: SOT-23 Serial Digital Thermal Sensor
c)
TC74A2-3.3VCTTR: SOT-23 Serial Digital Thermal Sensor
d)
TC74A3-3.3VCTTR: SOT-23 Serial Digital Thermal Sensor
e)
TC74A4-3.3VCTTR: SOT-23 Serial Digital Thermal Sensor
f)
TC74A5-3.3VCTTR: SOT-23 Serial Digital Thermal Sensor *
g)
TC74A6-3.3VCTTR: SOT-23 Serial Digital Thermal Sensor
h)
TC74A7-3.3VCTTR: SOT-23 Serial Digital Thermal Sensor
a)
TC74A0-5.0VCTTR: SOT-23 Serial Digital Thermal Sensor
b)
TC74A1-5.0VCTTR: SOT-23 Serial Digital Thermal Sensor
c)
TC74A2-5.0VCTTR: SOT-23 Serial Digital Thermal Sensor
d)
TC74A3-5.0VCTTR: SOT-23 Serial Digital Thermal Sensor
e)
TC74A4-5.0VCTTR: SOT-23 Serial Digital Thermal Sensor
f)
TC74A5-5.0VCTTR: SOT-23 Serial Digital Thermal Sensor *
g)
TC74A6-5.0VCTTR: SOT-23 Serial Digital Thermal Sensor
h)
TC74A7-5.0VCTTR: SOT-23 Serial Digital Thermal Sensor
* Default Address
CTTR = SOT-23-5 (Tape and Reel only)
PART NO.
Device
Examples:
XX
-XX
X
XX
Address Supply
Operating
Package
Options Voltage Temperature
Device:
Address Options:
TC74:
A0
A1
A2
A3
A4
A5
A6
A7
=
=
=
=
=
=
=
=
Serial Digital Thermal Sensor
1001
1001
1001
1001
1001
1001
1001
1001
000
001
010
011
100
101 *
110
111
* Default Address
Output Voltage:
3.3 = Accuracy optimized for 3.3V
5.0 = Accuracy optimized for 5.0V
Operating Temperature: V = -40°C  TA  +125°C
Package:
AT
Examples:
a)
TC74A0-3.3VAT:
TO-220 Serial Digital Thermal Sensor
b)
TC74A1-3.3VAT:
TO-220 Serial Digital Thermal Sensor
c)
TC74A2-3.3VAT:
TO-220 Serial Digital Thermal Sensor
d)
TC74A3-3.3VAT:
TO-220 Serial Digital Thermal Sensor
e)
TC74A4-3.3VAT:
TO-220 Serial Digital Thermal Sensor
f)
TC74A5-3.3VAT:
TO-220 Serial Digital Thermal Sensor *
g)
TC74A6-3.3VAT:
TO-220 Serial Digital Thermal Sensor
h)
TC74A7-3.3VAT:
TO-220 Serial Digital Thermal Sensor
a)
TC74A0-5.0VAT:
TO-220 Serial Digital Thermal Sensor
b)
TC74A1-5.0VAT:
TO-220 Serial Digital Thermal Sensor
c)
TC74A2-5.0VAT:
TO-220 Serial Digital Thermal Sensor
d)
TC74A3-5.0VAT:
TO-220 Serial Digital Thermal Sensor
e)
TC74A4-5.0VAT:
TO-220 Serial Digital Thermal Sensor
f)
TC74A5-5.0VAT:
TO-220 Serial Digital Thermal Sensor *
g)
TC74A6-5.0VAT:
TO-220 Serial Digital Thermal Sensor
h)
TC74A7-5.0VAT:
TO-220 Serial Digital Thermal Sensor
* Default Address
= TO-220-5
Sales and Support
Data Sheets
Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and recommended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following:
1.
2.
Your local Microchip sales office
The Microchip Worldwide Site (www.microchip.com)
Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using.
New Customer Notification System
Register on our web site (www.microchip.com/cn) to receive the most current information on our products.
 2001-2012 Microchip Technology Inc.
DS21462D-page15
TC74
NOTES:
DS21462D-page 16
 2001-2012 Microchip Technology Inc.
Note the following details of the code protection feature on Microchip devices:
•
Microchip products meet the specification contained in their particular Microchip Data Sheet.
•
Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
•
There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
•
Microchip is willing to work with the customer who is concerned about the integrity of their code.
•
Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable.”
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Information contained in this publication regarding device
applications and the like is provided only for your convenience
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
MICROCHIP MAKES NO REPRESENTATIONS OR
WARRANTIES OF ANY KIND WHETHER EXPRESS OR
IMPLIED, WRITTEN OR ORAL, STATUTORY OR
OTHERWISE, RELATED TO THE INFORMATION,
INCLUDING BUT NOT LIMITED TO ITS CONDITION,
QUALITY, PERFORMANCE, MERCHANTABILITY OR
FITNESS FOR PURPOSE. Microchip disclaims all liability
arising from this information and its use. Use of Microchip
devices in life support and/or safety applications is entirely at
the buyer’s risk, and the buyer agrees to defend, indemnify and
hold harmless Microchip from any and all damages, claims,
suits, or expenses resulting from such use. No licenses are
conveyed, implicitly or otherwise, under any Microchip
intellectual property rights.
Trademarks
The Microchip name and logo, the Microchip logo, dsPIC,
FlashFlex, KEELOQ, KEELOQ logo, MPLAB, PIC, PICmicro,
PICSTART, PIC32 logo, rfPIC, SST, SST Logo, SuperFlash
and UNI/O are registered trademarks of Microchip Technology
Incorporated in the U.S.A. and other countries.
FilterLab, Hampshire, HI-TECH C, Linear Active Thermistor,
MTP, SEEVAL and The Embedded Control Solutions
Company are registered trademarks of Microchip Technology
Incorporated in the U.S.A.
Silicon Storage Technology is a registered trademark of
Microchip Technology Inc. in other countries.
Analog-for-the-Digital Age, Application Maestro, BodyCom,
chipKIT, chipKIT logo, CodeGuard, dsPICDEM,
dsPICDEM.net, dsPICworks, dsSPEAK, ECAN,
ECONOMONITOR, FanSense, HI-TIDE, In-Circuit Serial
Programming, ICSP, Mindi, MiWi, MPASM, MPF, MPLAB
Certified logo, MPLIB, MPLINK, mTouch, Omniscient Code
Generation, PICC, PICC-18, PICDEM, PICDEM.net, PICkit,
PICtail, REAL ICE, rfLAB, Select Mode, SQI, Serial Quad I/O,
Total Endurance, TSHARC, UniWinDriver, WiperLock, ZENA
and Z-Scale are trademarks of Microchip Technology
Incorporated in the U.S.A. and other countries.
SQTP is a service mark of Microchip Technology Incorporated
in the U.S.A.
GestIC and ULPP are registered trademarks of Microchip
Technology Germany II GmbH & Co. & KG, a subsidiary of
Microchip Technology Inc., in other countries.
All other trademarks mentioned herein are property of their
respective companies.
© 2001-2012, Microchip Technology Incorporated, Printed in
the U.S.A., All Rights Reserved.
Printed on recycled paper.
ISBN: 9781620768396
QUALITY MANAGEMENT SYSTEM
CERTIFIED BY DNV
== ISO/TS 16949 ==
 2001-2012 Microchip Technology Inc.
Microchip received ISO/TS-16949:2009 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
Tempe, Arizona; Gresham, Oregon and design centers in California
and India. The Company’s quality system processes and procedures
are for its PIC® MCUs and dsPIC® DSCs, KEELOQ® code hopping
devices, Serial EEPROMs, microperipherals, nonvolatile memory and
analog products. In addition, Microchip’s quality system for the design
and manufacture of development systems is ISO 9001:2000 certified.
DS21462D-page 17
Worldwide Sales and Service
AMERICAS
ASIA/PACIFIC
ASIA/PACIFIC
EUROPE
Corporate Office
2355 West Chandler Blvd.
Chandler, AZ 85224-6199
Tel: 480-792-7200
Fax: 480-792-7277
Technical Support:
http://www.microchip.com/
support
Web Address:
www.microchip.com
Asia Pacific Office
Suites 3707-14, 37th Floor
Tower 6, The Gateway
Harbour City, Kowloon
Hong Kong
Tel: 852-2401-1200
Fax: 852-2401-3431
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Tel: 91-80-3090-4444
Fax: 91-80-3090-4123
India - New Delhi
Tel: 91-11-4160-8631
Fax: 91-11-4160-8632
Austria - Wels
Tel: 43-7242-2244-39
Fax: 43-7242-2244-393
Denmark - Copenhagen
Tel: 45-4450-2828
Fax: 45-4485-2829
India - Pune
Tel: 91-20-2566-1512
Fax: 91-20-2566-1513
France - Paris
Tel: 33-1-69-53-63-20
Fax: 33-1-69-30-90-79
Japan - Osaka
Tel: 81-6-6152-7160
Fax: 81-6-6152-9310
Germany - Munich
Tel: 49-89-627-144-0
Fax: 49-89-627-144-44
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Duluth, GA
Tel: 678-957-9614
Fax: 678-957-1455
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Tel: 774-760-0087
Fax: 774-760-0088
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Tel: 949-462-9523
Fax: 949-462-9608
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Tel: 408-961-6444
Fax: 408-961-6445
Toronto
Mississauga, Ontario,
Canada
Tel: 905-673-0699
Fax: 905-673-6509
Australia - Sydney
Tel: 61-2-9868-6733
Fax: 61-2-9868-6755
China - Beijing
Tel: 86-10-8569-7000
Fax: 86-10-8528-2104
China - Chengdu
Tel: 86-28-8665-5511
Fax: 86-28-8665-7889
China - Chongqing
Tel: 86-23-8980-9588
Fax: 86-23-8980-9500
Netherlands - Drunen
Tel: 31-416-690399
Fax: 31-416-690340
Korea - Daegu
Tel: 82-53-744-4301
Fax: 82-53-744-4302
Spain - Madrid
Tel: 34-91-708-08-90
Fax: 34-91-708-08-91
China - Hangzhou
Tel: 86-571-2819-3187
Fax: 86-571-2819-3189
Korea - Seoul
Tel: 82-2-554-7200
Fax: 82-2-558-5932 or
82-2-558-5934
China - Hong Kong SAR
Tel: 852-2943-5100
Fax: 852-2401-3431
Malaysia - Kuala Lumpur
Tel: 60-3-6201-9857
Fax: 60-3-6201-9859
China - Nanjing
Tel: 86-25-8473-2460
Fax: 86-25-8473-2470
Malaysia - Penang
Tel: 60-4-227-8870
Fax: 60-4-227-4068
China - Qingdao
Tel: 86-532-8502-7355
Fax: 86-532-8502-7205
Philippines - Manila
Tel: 63-2-634-9065
Fax: 63-2-634-9069
China - Shanghai
Tel: 86-21-5407-5533
Fax: 86-21-5407-5066
Singapore
Tel: 65-6334-8870
Fax: 65-6334-8850
China - Shenyang
Tel: 86-24-2334-2829
Fax: 86-24-2334-2393
Taiwan - Hsin Chu
Tel: 886-3-5778-366
Fax: 886-3-5770-955
China - Shenzhen
Tel: 86-755-8864-2200
Fax: 86-755-8203-1760
Taiwan - Kaohsiung
Tel: 886-7-213-7828
Fax: 886-7-330-9305
China - Wuhan
Tel: 86-27-5980-5300
Fax: 86-27-5980-5118
Taiwan - Taipei
Tel: 886-2-2508-8600
Fax: 886-2-2508-0102
China - Xian
Tel: 86-29-8833-7252
Fax: 86-29-8833-7256
Thailand - Bangkok
Tel: 66-2-694-1351
Fax: 66-2-694-1350
UK - Wokingham
Tel: 44-118-921-5869
Fax: 44-118-921-5820
China - Xiamen
Tel: 86-592-2388138
Fax: 86-592-2388130
China - Zhuhai
Tel: 86-756-3210040
Fax: 86-756-3210049
DS21462D-page 18
Italy - Milan
Tel: 39-0331-742611
Fax: 39-0331-466781
Japan - Tokyo
Tel: 81-3-6880- 3770
Fax: 81-3-6880-3771
11/29/12
 2001-2012 Microchip Technology Inc.