TCN75-3.3MPA TELCOM [TelCom Semiconductor, Inc], TCN75-3.3MPA Datasheet

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TCN75-3.3MPA

Manufacturer Part Number
TCN75-3.3MPA
Description
2-WIRE SERIAL TEMPERATURE SENSOR AND THERMAL MONITOR
Manufacturer
TELCOM [TelCom Semiconductor, Inc]
Datasheet
2-WIRE SERIAL TEMPERATURE
SENSOR AND THERMAL MONITOR
2-WIRE SERIAL TEMPERATURE SENSOR AND THERMAL MONITOR
FEATURES
TYPICAL APPLICATIONS
FUNCTIONAL BLOCK DIAGRAM
TCN75-04 6/16/97
GENERAL DESCRIPTION
sensor that notifies the host controller when ambient tem-
V
SDA
SCL
DD
A
A
A
0
1
2
Solid State Temperature Sensing; 2 C Accuracy (Typ.)
Operates from – 55 C to +125 C
Operating Range ..................................... 2.7V - 5.5V
Programmable Trip Point and Hysteresis with
Power-up Defaults
Standard 2-Wire Serial Interface
Thermal Event Alarm Output Functions as
Interrupt or Comparator / Thermostat Output
Up to 8 TCN75's May Share the Same Bus
Shutdown Mode for Low Standby Power
Consumption
Low Power ......................... 250 A (Typ.) Operating
8-Pin Plastic DIP, SOIC, and MSOP Packaging
Thermal Protection for High Performance CPU's
Solid-State Thermometer
Fire/Heat Alarms
Thermal Management in Electronic Systems:
Copiers / Office Electronics
Consumer Electronics
Process Control
The TCN75 is a serially programmable temperature
Sensor
Computers
Telecom Racks
Power Supplies / UPS* / Amplifiers
Temp
TelCom Semiconductor reserves the right to make changes in the circuitry and specifications of its devices.
Serial Port
Converter
Two Wire
Interface
9 Bit
A/D
Configuration
Temperature
Register Set
1 A (Typ.) Shutdown Mode
T
T
HYST
SET
Control
Logic
TCN75
INT/CMPTR
1
perature exceeds a user-programmed setpoint. Hysteresis
is also programmable. The INT/CMPTR output is program-
mable as either a simple comparator for thermostat opera-
tion or as a temperature event interrupt. Communication
with the TCN75 is accomplished via a two-wire bus that is
compatible with industry standard protocols. This permits
reading the current temperature, programming the setpoint
and hysteresis, and configuring the device.
default setpoint of 80 C with 5 C hysteresis. Defaults allow
independent operation as a stand-alone thermostat. A shut-
down command may be sent via the 2-wire bus to activate
the low-power standby mode. Address selection inputs
allow up to eight TCN75's to share the same 2-wire bus for
multi-zone monitoring.
CMPTR output's polarity is user programmable. Both polled
and interrupt driven systems are easily accommodated.
Small physical size, low installed cost, and ease of use make
the TCN75 an ideal choice for implementing sophisticated
system management schemes.
PIN CONFIGURATIONS
ORDERING INFORMATION
Part No.
TCN75-3.3MOA
TCN75-5.0MOA
TCN75-3.3MPA
TCN75-5.0MPA
TCN75-3.3MUA
TCN75-5.0MUA
INT/CMPTR
INT/CMPTR
The TCN75 powers up in Comparator Mode with a
All registers can be read by the host and the INT/
GND
GND
SDA
SDA
SCL
SCL
1
2
3
4
1
2
3
4
8-Pin Plastic DIP
8-Pin SOIC
TCN75MPA
TCN75MOA
Voltage (V) Package
Supply
PRELIMINARY INFORMATION
3.3
5.0
3.3
5.0
3.3
5.0
8
7
6
5
8
7
6
5
V
A0
A1
A2
A0
A1
A2
V
DD
8-Pin SOIC
8-Pin SOIC
8-Pin PDIP
8-Pin PDIP
8-MSOP
8-MSOP
DD
INT/CMPTR
GND
SDA
SCL
1
2
4
3
8-Pin MSOP
– 55 C to +125 C
– 55 C to +125 C
– 55 C to +125 C
– 55 C to +125 C
– 55 C to +125 C
– 55 C to +125 C
TCN75MUA
Temp. Range
Junction
TCN75
TCN75
8
7
6
5
V
A0
A1
A2
DD

Related parts for TCN75-3.3MPA

TCN75-3.3MPA Summary of contents

Page 1

... Small physical size, low installed cost, and ease of use make the TCN75 an ideal choice for implementing sophisticated system management schemes. ORDERING INFORMATION Part No. TCN75-3.3MOA TCN75-5.0MOA TCN75-3.3MPA TCN75-5.0MPA TCN75-3.3MUA TCN75-5.0MUA PIN CONFIGURATIONS INT/CMPTR SDA Control ...

Page 2

... Serial Port Active Shutdown Mode, Serial Port Inactive ( Note 1 User Programmable I = 4.0mA OL – +125 3.3V : TCN75-3.3MOA, DD TCN75-3.3MPA, TCN75-3.3MUA V = 5.0V: TCN75-5.0MOA, DD TCN75-5.0MPA, TCN75-5.0 MUA 100 C A Power Up Power 3mA 5.5V ...

Page 3

... At maximum rated output current and saturation voltage, 4mA and 0.8V, respectively, the error amounts to 0.352 C for the PDIP, and 0.544 C for the SOIC. 2. All part types of the TCN75 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 ...

Page 4

... TEMP, T read from and written to. Transitions on SDA or SCL due to external bus activity may increase the standby power con- sumption. If the TCN75 is in Interrupt Mode, the state of INT/ CMPTR will be RESET upon entering shutdown mode. Fault Queue To lessen the probability of spurious activation of INT/ CMPTR the TCN75 may be programmed to filter out tran- sient events ...

Page 5

... Acknowledge (ACK) provides a positive handshake between the host and the TCN75. The host releases SDA after transmitting eight bits then generates a ninth clock cycle to allow the TCN75 to pull the SDA line LOW to acknowledge that it successfully received the previous eight bits of data or address. ...

Page 6

... R/W 0 Start Ack by by Address Byte Master TCN75 (f) T and T Write OS HYST TCN75-04 6/16/97 SENSOR AND THERMAL MONITOR Ack by Most Significant Data Byte Least Significant Data Byte Master , T OS HYST ...

Page 7

... Register Selection 0 0 TEMP 0 1 CONFIG HYST SET TCN75-04 6/16/97 Configuration Register (CONFIG), 8-bits, Read/Write Configuration Register (CONFIG) D[7] D[6] Must Be Set To Zero D[2] D[1] D[0] Pointer D0: Shutdown: D1: CMPTR/INT Comparator Mode D2: INT/CMPTR POLARITY Active Low D3 - D4: Fault Queue: Number of sequential temperature- to-digital conversions with the same result before the ...

Page 8

... C 0 00110010 +0 00000001 00000000 – 0 11111111 – 11001110 – 10110000 – 10010010 The TCN75's register set is summarized below Name Description TEMP Ambient Temperature T Temperature Setpoint SET T Temperature Hysteresis HYST POINT Register Pointer CONFIG Configuration Register ...

Page 9

... SERIAL TEMPERATURE SENSOR AND THERMAL MONITOR PACKAGE DIMENSIONS .045 (1.14) .030 (0.76) .200 (5.08) .140 (3.56) .150 (3.81) .115 (2.92) .110 (2.79) .090 (2.29) .050 (1.27) TYP. .197 (5.00) .189 (4.80) .018 (0.46) .014 (0.36) TCN75-04 6/16/97 8-Pin Plastic DIP PIN 1 .260 (6.60) .240 (6.10) .070 (1.78) .045 (1.14) .400 (10.16) .348 (8.84) .040 (1.02) .020 (0.51) .015 (0.38) .008 (0.20) .022 (0.56) .015 (0.38) 8-Pin SOIC PIN 1 ...

Page 10

... Sales Offices TelCom Semiconductor 1300 Terra Bella Avenue P.O. Box 7267 Mountain View, CA 94039-7267 TEL: 415-968-9241 FAX: 415-967-1590 E-Mail: liter@c2smtp.telcom-semi.com TCN75-04 6/16/97 2-WIRE SERIAL TEMPERATURE SENSOR AND THERMAL MONITOR 8-Pin MSOP PIN 1 .197 (5.00) .122 (3.10) .114 (2.90) .187 (4.80) .043 (1.10) 6 MAX. MAX. ...

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