Datasheet TCN75-5.0MOA, TCN75-3.3MUA, TCN75-3.3MOA, TCN75-3.3MPA, TCN75-5.0MPA Datasheet (TelCom Semiconductor)

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Page 1

2-WIRE SERIAL TEMPERATURE

PRELIMINARY INFORMATION

SENSOR AND THERMAL MONIT OR

TCN75

2-WIRE SERIAL TEMPERATURE SENSOR AND THERMAL MONITOR

FEATURES

■

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......................... 250µA (Typ.) Operating

1µA (Typ.) Shutdown Mode

■ 8-Pin Plastic DIP, SOIC, and MSOP Packaging

TYPICAL APPLICATIONS

■ Thermal Protection for High Performance CPU's

■ Solid-State Thermometer

■ Fire/Heat Alarms

■ Thermal Management in Electronic Systems:

Computers Telecom Racks Power Supplies / UPS* / Amplifiers

■ Copiers / Office Electronics

■ Consumer Electronics

■ Process Control

GENERAL DESCRIPTION

The TCN75 is a serially programmable temperature

sensor that notifies the host controller when ambient tem-

perature exceeds a user-programmed setpoint. Hysteresis is also programmable. The INT/CMPTR output is programmable as either a simple comparator for thermostat operation 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.

The TCN75 powers up in Comparator Mode with a default setpoint of 80°C with 5°C hysteresis. Defaults allow independent operation as a stand-alone thermostat. A shutdown 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.

All registers can be read by the host and the INT/ 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.

ORDERING INFORMATION

Supply Junction

Part No. Voltage (V) Package Temp. Range

TCN75-3.3MOA 3.3 8-Pin SOIC – 55°C to +125°C TCN75-5.0MOA 5.0 8-Pin SOIC – 55°C to +125°C T

CN75-3.3MPA 3.3 8-Pin PDIP – 55°C to +125°C TCN75-5.0MPA 5.0 8-Pin PDIP – 55°C to +125°C TCN75-3.3MUA 3.3 8-MSOP – 55°C to +125°C TCN75-5.0MUA 5.0 8-MSOP – 55°C to +125°C

FUNCTIONAL BLOCK DIAGRAM

9 Bit

∆Σ

A/D

Temp

SDA SCL

Sensor

TCN75-04 6/16/97

Converter

Configuration

Temperature

Two Wire

Serial Port

Interface

TelCom Semiconductor reserves the right to make changes in the circuitry and specifications of its devices.

Control

SET

HYST

Logic

TCN75

INT/CMPTR

PIN CONFIGURATIONS

8-Pin Plastic DIP

SDA V

SCL

INT/CMPTR A1

INT/CMPTR

GND

SDA

SCL

GND

TCN75MPA

8-Pin SOIC

TCN75MOA

3 4

7 6 5

A0 A1 A2

SDA

SCL

INT/CMPTR

GND

8-Pin MSOP

1 2

TCN75MUA

Page 2

PRELIMINARY INFORMATION

TCN75

2-WIRE SERIAL TEMPERATURE

SENSOR AND THERMAL MONIT OR

ABSOLUTE MAXIMUM RATINGS*

Supply Voltage (VDD) .................................................6.0V

ESD Susceptibility (Note 2)..................................... (TBD)

Voltage on Any Pin............. (GND – 0.3V) to (VDD + 0.3V)

Operating Temperature Range (TJ) ......– 55°C to +125°C

Storage Temperature Range (T

ELECTRICAL CHARACTERISTICS: V

) .....– 65°C to +150°C

STG

= 2.7V – 5.5V, – 55°C ≤ (TA = TJ) ≤ 125°C, unless otherwise noted.

Lead Temperature (Soldering, 10 sec) ................. +300°C

Thermal Resistance (Junction to Ambient)

8-Pin DIP...................................................... 110°C/W

8-Pin SOIC .................................................. 170°C/W

8-Pin MSOP................................................ 250°C//W

*This is a stress rating only and functional operation of this device at these or any other conditions above those indicated in the operations sections of this specification is not implied.

Symbol Parameter Test Conditions Min Typ Max Unit Power Supply

V I

DD1

Power Supply Voltage 2.7 — 5.5 V Operating Current

Serial Port Inactive (T

= TJ = 25°C)

— 0.250 — mA

Serial Port Active — — 1.0

Standby Supply Current Shutdown Mode, Serial Port Inactive — 1 — µA

(TA = TJ = 25°C)

INT/CMPTR Output

TRIP

Sink Current: INT/CMPTR, SDA Note 1 — 1 4 mA Outputs

INT/CMPTR Response Time User Programmable 1 — 6 t

CONV

Output Low Voltage IOL = 4.0mA — — 0.8 V

Temp-to-Bits Converter

∆T Temperature Accuracy (Note 2) – 55°C ≤ TA ≤ +125°C—±3—°C

= 3.3V : TCN75-3.3MOA,

TCN75-3.3MPA, TCN75-3.3MUA

= 5.0V: TCN75-5.0MOA,

TCN75-5.0MPA, TCN75-5.0 MUA 25°C ≤ TA ≤ 100°C—±0.5 ±2 °C

CONV

SET(PU)

HYST(PU)

Conversion Time — 100 — msec TEMP Default Value Power Up — 80 — °C T

Default Value Power Up — 75 — °C

HYST

2-Wire Serial Bus Interface

LEAK

OL(SDA)

Logic Input High VDD x 0.7 — — V Logic Input Low — — VDD x 0.3 V Logic Output Low IOL = 3mA — — 0.4 V Input Capacitance SDA, SCL — 15 — pF I/O Leakage

(TA = TJ = 25°C)

— ±100 — pA

SDA Output Low Current — — 6 mA

SERIAL PORT TIMING: 2.7V ≤ V

≤ 5.5V; – 55°C ≤ (TA = TJ ) ≤ 125°C, CL = 80pf, unless otherwise noted.

Symbol Parameter Test Conditions Min Typ Max Unit

LOW

HIGH

SU(START)

TCN75-04 6/16/97

Serial Port Frequency 0 100 400 kHz Low Clock Period 1250 — — nsec High Clock Period 1250 — — nsec SCL and SDA Rise Time — — 250 nsec SCL and SDA Fall Time — — 250 nsec Start Condition Setup Time 1250 — — nsec

(for repeated Start Condition)

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2-WIRE SERIAL TEMPERATURE SENSOR AND THERMAL MONIT OR

PRELIMINARY INFORMATION

TCN75

SERIAL PORT TIMING (Cont.): 2.7V ≤ V

≤ 5.5V; – 55°C ≤ (TA = TJ ) ≤ 125°C, CL = 80pf, unless otherwise

noted.

Symbol Parameter Test Conditions Min Typ Max Unit

H(START)

DSU

SU(STOP)

IDLE

NOTES: 1. Output current should be minimized for best temperature accuracy. Power dissipation within the TCN75 will cause self-heating and

Start Condition Hold Time 1250 — — nsec Data in Setup Time to SCL High 100 — — nsec Data in Hold Time after SCL Low 0 — — nsec Stop Condition Setup Time 1250 — — nsec Bus Free Time Prior to New 1250 — — nsec

Transition

temperature drift. 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. As VDD varies from the nominal value, accuracy will degrade 1°C/V of VDD change.

3. Human body model, 100pF discharged through a 1.5k resistor, machine model, 200pF discharged directly into each pin.

PIN DESCRIPTION

Pin Number Symbol Description

1 SDA Bidirectional Serial Data. 2 SCL Serial Data Clock Input. 3 INT/CMPTR Interrupt or Comparator Output. 4 GND System Ground. 5A 6A 7A 8VDDPower Supply Input.

2 1 0

Address Select Pin (MSB). Address Select Pin. Address Select Pin (LSB).

DETAILED DESCRIPTION

A typical TCN75 hardware connection is shown in

Figure 1.

Serial Data (SDA)

Bidirectional. Serial data is transferred in both directions

using this pin.

Serial Clock (SCL)

Input. Clocks data into and out of the TCN75.

INT/CMPTR

Open Collector, Programmable Polarity. In Comparator Mode, unconditionally driven active any time temperature exceeds the value programmed into the T CMPTR will become inactive when temperature subsequently falls below the T

Programmer's Model.

setting. (See

HYST

) In Interrupt Mode, INT/CMPTR is also made active by TEMP exceeding T ally reset to its inactive state by reading any register via the 2-wire bus. If and when temperature falls below T CMPTR is again driven active. Reading any register will clear the T

TCN75-04 6/16/97

interrupt. In Interrupt Mode, the INT/CMPTR

HYST

SET

; it is uncondition-

SET

HYST

, INT/

output is unconditionally reset upon entering Shutdown Mode. If programmed as an active-low output, it can be wire-ORed with any number of other open collector devices. Most systems will require a pull-up resistor for this configuration.

Note that current sourced from the pull-up resistor causes power dissipation and may cause internal heating of the TCN75. To avoid affecting the accuracy of ambient temperature readings, the pull-up resistor should be made as large as possible. INT/CMPTR's output polarity may be programmed by writing to the INT/CMPTR POLARITY bit in the CONFIG register. The default is active low.

Address (A2, A1, A0)

Inputs. Sets the three least significant bits of the TCN75 8-bit address. A match between the TCN75's address and the address specified in the serial bit stream must be made to initiate communication with the TCN75. Many protocolcompatible devices with other addresses may share the same 2-wire bus.

Slave Address

The four most significant bits of the Address Byte (A6, A5, A4, A3) are fixed to 1001[B]. The states of A2, A1 and

Page 4

PRELIMINARY INFORMATION

TCN75

2-WIRE SERIAL TEMPERATURE

SENSOR AND THERMAL MONIT OR

A0 in the serial bit stream must match the states of the A2, A1 and A0 address inputs for the TCN75 to respond with an Acknowledge (indicating the TCN75 is on the bus and ready to accept data). The Slave Address is represented by:

TCN75 Slave Address

1001A2A1A0

MSB LSB

Comparator/Interrupt Modes

INT/CMPTR behaves differently depending on whether the TCN75 is in Comparator Mode or Interrupt Mode. Comparator Mode is designed for simple thermostatic operation. INT/CMPTR will go active anytime TEMP exceeds T

. When in Comparator Mode, INT/CMPTR will remain

SET

active until TEMP falls below T

, whereupon it will reset

HYST

to its inactive state. The state of INT/CMPTR is maintained in shutdown mode when the TCN75 is in comparator mode. In Interrupt Mode, INT/CMPTR will remain active indefinitely, even if TEMP falls below T

, until any register is

HYST

read via the 2-wire bus. Interrupt Mode is better suited to interrupt driven microprocessor-based systems. The INT/ CMPTR output may be wire-OR'ed with other interrupt sources in such systems. Note that a pull-up resistor is necessary on this pin since it is an open-drain output. Entering Shutdown Mode will unconditionally reset INT/ CMPTR when in Interrupt Mode.

SHUTDOWN MODE

When the appropriate bit is set in the configuration register (CONFIG) the TCN75 enters its low-power shutdown mode (IDD = 1µA, typical) and the temperature-todigital conversion process is halted. The TCN75's bus interface remains active and TEMP, T

SET

, and T

HYST

may be read from and written to. Transitions on SDA or SCL due to external bus activity may increase the standby power consumption. 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 transient events. This is done by programming the desired value into the Fault Queue. Logic inside the TCN75 will prevent the device from triggering INT/CMPTR unless the programmed number of sequential temperature-to-digital conversions yield the same qualitative result. In other words, the value reported in TEMP must remain above T for the consecutive number of cycles programmed in the Fault Queue. Up to a six-cycle "filter" may be selected. See

or below T

SET

HYST

Serial Port Operation

The Serial Clock input (SCL) and bidirectional data port (SDA) form a 2-wire bidirectional serial port for programming and interrogating the TCN75. The following conventions are used in this bus scheme:

TCN75 Serial Bus Conventions Term Explanation

Transmitter The device sending data to the bus. 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

SCL is high. Stop A unique condition signaling the end of a transfer

indicated by SDA rising (Low - High) while SCL is

high. ACK A Receiver acknowledges the receipt of each

byte with this unique condition. The Receiver

drives SDA low during SCL high of the ACK

clock-pulse. The Master provides the clock pulse

for the ACK cycle. NOT Busy When the bus is idle, both SDA & SCL will

remain high. Data Valid The state of SDA must remain stable during the

High period of SCL in order for a data bit to be

considered valid. SDA only changes state while

SCL is low during normal data transfers. (See

Start and Stop conditions)

All transfers take place under control of a host, usually a CPU or microcontroller, acting as the Master, which provides the clock signal for all transfers. The TCN75 operates as a Slave. This serial protocol is illustrated in Figure 2. All data transfers have two phases; and all bytes are transferred MSB first. Accesses are initiated by a start condition (START), 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 (STOP). A convention called

edge

(ACK) confirms receipt of each byte. Note that SDA can change only during periods when SCL is LOW (SDA changes while SCL is HIGH are reserved for Start and Stop Conditions).

Start Condition (START)

The TCN75 continuously monitors the SDA and SCL lines for a start condition (a HIGH to LOW transition of SDA while SCL is HIGH), and will not respond until this condition is met.

always

Acknowl-

TCN75-04 6/16/97

Page 5

2-WIRE SERIAL TEMPERATURE SENSOR AND THERMAL MONIT OR

PRELIMINARY INFORMATION

TCN75

Address Byte

Immediately following the Start Condition, the host must next transmit the address byte to the TCN75. The four most significant bits of the Address Byte (A6, A5, A4, A3) are fixed to 1001(B). The states of A2, A1 and A0 in the serial bit stream must match the states of the A2, A1 and A0 address inputs for the TCN75 to respond with an Acknowledge (indicating the TCN75 is on the bus and ready to accept data). The eighth 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.

Acknowledge (ACK)

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.

Data Byte

After a successful ACK of the address byte, the host must next transmit the data byte to be written or clock out the data to be read. (See the appropriate timing diagrams.) ACK will be generated after a successful write of a data byte into the TCN75.

over the power supply voltage range of 2.7V to 5.5V, but with a lower measurement accuracy. Figure 2 shows the worst case temperature measurement error for the TCN75CO_-3 operated at a power supply voltage of 5V ± 10%. Figure 3 shows the worst case temperature measurement error for the TCN75CO_-3 operated at a power supply voltage of 3.3V ±10%.

±5

±4

±3

ERROR (°0)

±2

±1

20 35 50 65 80 12595 110

TCN75 Case Temeprature (°C)

Figure 2. TCN75CO_-3 Measurement Error at V

= 5V ± 10%

Stop Condition (STOP)

Communications must be terminated by a stop condition (a LOW to HIGH transition of SDA while SCL is HIGH). The Stop Condition must be communicated by the transmitter to the TCN75.

Power Supply

To minimize temperature measurement error, the TCN75VO_-3 is factory calibrated at a supply voltage of

3.3V ±5V and the TCN75CO_-5 is factory calibrated at a supply voltage of 5V ±5%. Either device is fully operational

(3V to 5.5V)

Address

(Set as Desired)

C Interface

SDA SCL

Bypass

8 A A

TCN75

1 2

0.1µF Recommended Unless Device is Mounted Close to CPU

INT/CMPTR

TO PROCESSOR

±5

±4

±3

ERROR (°0)

±2

±1

20 35 50 65 80 12595 110

TCN75 Case Temeprature (°C)

Figure 3. TCN75CO_-5 Measurement Error at V

= 3.3V ± 10%

TCN75-04 6/16/97

Figure 1. Typical Application

Page 6

PRELIMINARY INFORMATION

TCN75

2-WIRE SERIAL TEMPERATURE

SENSOR AND THERMAL MONIT OR

Start

Master

Address Byte

(a) Typical 2-Byte Read From Preset Pointer Location Such as Temp, TOS, T

Start

Master

1 A2A1A0

Address Byte

Repeat

Start

Master

Address Byte

19199

D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D01 A2A1A0

R/W

Ack

Most Significant Data Byte

TCN75

199

R/W

000000D1D0

Ack

TCN75

Pointer Byte

19199

D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D01 A2A1A0

R/W

Ack

Most Significant Data Byte

TCN75

Ack

Least Significant Data Byte

Master

HYST

. . . . .

Ack

TCN75

Ack

Master

Least Significant Data Byte

(b) Typical Pointer Set Followed by Immediate Read for 2-Byte Register Such as Temp, TOS, T

Start

Master

Address Byte

199

D7 D6 D5 D4 D3 D2 D1 D01 A2A1A0

R/W

Ack

TCN75

Data Byte

No Ack

Master

Stop

Cond

Master

19199

HYST

Stop

No Ack

Cond

Master

Stop

No Ack

Cond

Master

0 0 0 0 0 0 0 D0 D7 D6 D5 D4 D3 D2 D1 D0100 A21A1A01 A2A1A0

Start

Master

Address Byte

(d) Typical Pointer Set Followed by Immediate Read from Configuration Register

Start

Master

Address Byte

R/W

Ack

R/W

TCN75

Ack

TCN75

Pointer Byte

19199

000000D1D0 00 0 D4 D2D3 D1 D01 A2A1A0

Pointer Byte

Ack

TCN75

Ack

TCN75

Repeat

Master

(e) Configuration Register Write

Start

Master

(f) TOS and T

Address Byte

HYST

Write

19199

000000D1D0 D7D6D5D4D3D2D1D0D6 D5 D4 D2D3 D1 D01 A2A1A0

R/W

Ack

TCN75

Pointer Byte

Ack

TCN75

Figure 2. Timing Diagrams

TCN75-04 6/16/97

Start

Address Byte

Configuration Byte

Most Significant Data Byte

R/W

Stop

Ack

TCN75

No Ack

Master

Cond

Master

Stop

Cond

Master

Ack

TCN75

Stop

Ack

Cond

TCN75

Master

Ack

Least Significant Data Byte

TCN75

Data Byte

Page 7

2-WIRE SERIAL TEMPERATURE SENSOR AND THERMAL MONIT OR

PRELIMINARY INFORMATION

TCN75

REGISTER SET AND PROGRAMMER'S MODEL

Register (POINT), 8-bits, Write-only

Pointer Register (POINT)

D[7] D[6] D[5] D[4] D[3] D[2] D[1] D[0]

Must Be Set To Zero Pointer

D1 D0 Register Selection

0 0 TEMP 0 1 CONFIG 10T 11T

HYST SET

Configuration Register (CONFIG), 8-bits, Read/Write

Configuration Register (CONFIG)

D[7] D[6] D[5] D[4] D[3] D[2] D[1] D[0]

Must Be Set To Zero Fault INT/CMPTR. COMP/ Shut-

Queue POLARITY INT. Down

D0: Shutdown: 0 = Normal Operation

1 = Shutdown Mode

D1: CMPTR/INT: 0 = Comparator Mode

1 = Interrupt Mode

D2: INT/CMPTR POLARITY: 0 = Active Low

1 = Active High

D3 - D4: Fault Queue: Number of sequential temperature-

to-digital conversions with the same result before the INT/CMPTR output is updated:

D4 D3 Number of Conversions

0 0 1 (Power-up-default) 012 104 116

TCN75-04 6/16/97

Page 8

PRELIMINARY INFORMATION

2-WIRE SERIAL TEMPERATURE

SENSOR AND THERMAL MONIT OR

TCN75

Temperature (TEMP) Register, 16-bits, Read-only

The binary value in this register represents ambient

temperature following a conversion cycle.

Temperature Register (TEMP)

D[15] D[14] D[13] D[12] D[11] D[10] D[9] D[8] D[7] D[6] D[5] D[4] D[3] D[2] D[1] D[0]

MSB D7 D6 D5 D4 D3 D2 D1 LSB X X X X X X X

Temperature Setpoint (T

Temperature Setpoint Register (T

D[15] D[14] D[13] D[12] D[11] D[10] D[9] D[8] D[7] D[6] D[5] D[4] D[3] D[2] D[1] D[0]

MSB D7 D6 D5 D4 D3 D2 D1 LSB X X X X X X X

Hysteresis Register (T

D[15] D[14] D[13] D[12] D[11] D[10] D[9] D[8] D[7] D[6] D[5] D[4] D[3] D[2] D[1] D[0]

MSB D7 D6 D5 D4 D3 D2 D1 LSB X X X X X X X

In the TEMP, T

SET

HYST

, and T

)

HYST

) and Hysteresis (T

SET

)

SET

registers, each unit value

) Register, 16-bits, Read-Write:

HYST

represents one-half degree (Celsius). The value is in 2's complement binary format such that a reading of 000000000b corresponds to 0°C. Examples of this temperature to binary value relationship are shown in the following table.

Temperature to Digital Value Conversion

Temperature Binary Value HEX Value

+125°C 0 11111010 0FA

+25°C 0 00110010 032

+0.5°C 0 00000001 001

0°C 0 00000000 00

– 0.5°C 1 11111111 1FF

– 25°C 1 11001110 1CE – 40°C 1 10110000 1B0 – 55°C 1 10010010 192

The TCN75's register set is summarized below

Name Description Width Read Write Notes

TEMP Ambient Temperature 16 X 2's Complement Format

SET

HYST

POINT Register Pointer 8 X X

CONFIG Configuration Register 8 X X

TCN75-04 6/16/97

Temperature Setpoint 16 X X 2's Complement Format Temperature Hysteresis 16 X X 2's Complement Format

Page 9

2-WIRE SERIAL TEMPERATURE SENSOR AND THERMAL MONIT OR

PACKAGE DIMENSIONS

PRELIMINARY INFORMATION

TCN75

8-Pin Plastic DIP

PIN 1

.260 (6.60) .240 (6.10)

.045 (1.14) .030 (0.76)

.200 (5.08) .140 (3.56)

.150 (3.81) .115 (2.92)

.400 (10.16)

.348 (8.84)

.110 (2.79) .090 (2.29)

.070 (1.78) .045 (1.14)

.022 (0.56) .015 (0.38)

.157 (3.99) .150 (3.81)

PIN 1

.244 (6.20) .228 (5.79)

.040 (1.02) .020 (0.51)

8-Pin SOIC

.015 (0.38) .008 (0.20)

.310 (7.87) .290 (7.37)

3°MIN.

.400 (10.16)

.310 (7.87)

TCN75-04 6/16/97

.050 (1.27) TYP.

.197 (5.00) .189 (4.80)

.018 (0.46) .014 (0.36)

.010 (0.25) .004 (0.10)

.069 (1.75) .053 (1.35)

8°MAX.

.010 (0.25) .007 (0.18)

.050 (1.27) .016 (0.40)

Dimensions: inches (mm)

Page 10

PRELIMINARY INFORMATION

TCN75

2-WIRE SERIAL TEMPERATURE

SENSOR AND THERMAL MONIT OR

8-Pin MSOP

PIN 1

.026 (0.65) TYP.

.122 (3.10) .114 (2.90)

.016 (0.40) .010 (0.25)

.006 (0.15)

.002 (0.05)

.122 (3.10) .114 (2.90)

.197 (5.00) .187 (4.80)

.043 (1.10)

MAX.

6°MAX.

.008 (0.20) .005 (0.13)

.028 (0.70) .016 (0.40)

Dimensions: inches (mm)

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: [email protected]

TCN75-04 6/16/97

TelCom Semiconductor

Austin Product Center 9101 Burnet Rd. Suite 214 Austin, TX 78758 TEL: 512-873-7100 FAX: 512-873-8236

TelCom Semiconductor H.K. Ltd.

10 Sam Chuk Street, Ground Floor San Po Kong, Kowloon Hong Kong TEL: 852-2324-0122 FAX: 852-2354-9957

Printed in the U.S.A.