Philips ne1619 DATASHEETS

INTEGRATED CIRCUITS

NE1619

HECETA 4 Temperature and voltage monitor

Product specification 2000 Jul 13

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Philips Semiconductors Product specification

NE1619HECETA4 Temperature and voltage monitor

GENERAL DESCRIPTION

The NE1619 is designed for monitoring the temperatures and supply voltages of microprocessor-based systems by measuring those parameters and comparing the readings with programmable limits. The device provides five possible analog inputs, a remote temperature sensor input and on-board local temperature sensor. The device also monitors its own power supply and provides digital inputs for the Pentium/PRO power supply ID code.

The device communicates with the system controller via an SMBus (System Management bus) by which it can be programmed for operation and data collection. Readings come from conversions of the on-board A-to-D converter which cycles through all measurements in sequence in approximately one second when the conversion is started. The device includes a number of registers to store data of the device configuration, status, readings and limits. Except for the temperature-related data which are in 8-bit digital

2’s complement format, all the data are in 8-bit digital straight format.

FEA TURES

•Monitor local and remote temperatures

•Temperature accuracy of ±2 °C for local, and ±3 °C for remote

channel

•Temperature resolution of 1 °C

•2.8 V to 5.5 V supply range

•Monitor different power supplies: 12 V, 5 V, 3.3 V, 2.5 V, V

•V

accuracy of ±2% of full scale

CCP, VDD

•Differential non-linearity of ±1LSB

•No calibration required

•Programmable temperature and voltage limits for alarms

•Programmable Reset low state pulse output

•SMBus 2-wire serial interface

•Small 16-lead QSOP package

•Compatible with Intel “Heceta 4” specification and reference

designs utilizing it

APPLICATIONS

•System thermal and hardware monitor

•Desktop computers

•Notebook computers

•Industrial controllers

•T elecom equipment

ORDERING INFORMATION

PART NUMBER PACKAGE DRAWING NUMBER

NE1619 16-lead QSOP package SOT519-1

2000 Jul 13 853-2202 24122

Philips Semiconductors Product specification

NE1619HECETA4 Temperature and voltage monitor

PINNING Pin Configuration

16SDA 15 14 13 12 11 10

SL01228

A0/RESET

/NTEST_OUT

CCPVIN

2.5V

3.3V

12VIN/VID4 D+ D–/NTEST_IN

1 2

SCL

GND

/3.3VSB

VID0

VID1

VID2

VID3

Pin Description

PIN # SYMBOL FUNCTION DESCRIPTION

1 SDA Digital I/O. SMBus serial bi-directional data. Open-drain output. 2 SCL Digital Input. SMBus serial clock input. 3 GND Ground. To be connected to system ground. 4 VDD/3.3VSB Power supply. Can be connected to +3.3 V standby power if monitoring in low power states is

5 VID0 Digital Input. For Voltage ID readouts from the processor. This value is read into the VID status

6 VID1 Digital Input. For Voltage ID readouts from the processor. This value is read into the VID status register. 7 VID2 Digital Input. For Voltage ID readouts from the processor. This value is read into the VID status register. 8 VID3 Digital Input. For Voltage ID readouts from the processor. This value is read into the VID status register. 9 D–/NTEST_IN Analog/Digital Input. This pin is connected to the negative terminal of the remote temperature sensor for

10 D+ Analog Input. This pin is connected to the positive terminal of the remote temperature sensor. 11 12VIN/VID4 Analog/Digital Input. Defaults at power-up to analog input for monitoring the +12 V supply. This pin is

12 5V 13 3.3V 14 2.5V 15 V

IN IN

CCPVIN

16 A0/RESET/NTEST_IN Digital I/O. At power-up, the logic input of this pin defines the LSB bit of the device slave address.

required. This pin also serves as the analog input to monitor the VDD voltage level.

analog input. If this pin is held high at power-up, for digital input, it enables the NAND-TREE test mode.

programmable to be a digital input for voltage ID readouts from the processor. Its state is read into the

VID4 status register. Analog Input. For monitoring the +5 V supply. Analog Input. For monitoring the +3.3 V supply. Analog Input. For monitoring the +2.5 V supply. Analog Input. For monitoring the processor voltage supply (0 to 3.0 V)

This pin can be configured to give a low pulse reset output of 20ms minimum. This pin also functions as the output in the NAND–TREE test mode.

2000 Jul 13

Philips Semiconductors Product specification

NE1619HECETA4 Temperature and voltage monitor

FUNCTIONAL BLOCK DIAGRAM

D+ D-/

NTEST_IN

GND

VDD

CCVIN

2.5 VIN

3.3 VIN 5 VIN

12 VIN/

VID4

Local Temp

Sensor

Temp

Mux

A-to-D

Converter

Voltage

Mux

Vin

Attenuators

Switch

Vid4

Control

Logic

Local Temp

RDG Register

Remote Temp RDG Register

VDD Reading

VCCP Reading

2.5 V Reading Register

3.3 V Reading Register

5 V Reading

12 V Reading

SMBus Interface

Configuration

Local Temp

HL Register

Remote Temp

HL Register

VDD HL Register

VCCP HL

2.5 V HL Register

3.3 V HL Register

5 V HL

12 V HL Register

Command

Pointer Register

Local Temp LL Register

Remote Temp

LL Register

VDD LL

VCCP LL

2.5 V LL Register

3.3 V LL Register

5 V LL

12 V LL

Address Decoder

and Register

Status

Company #

Step Version

Test

Reset Pulse

Circuit

VID 0-3

NTEST

Circuit

A0/

Reset #/

NTEST_OUT

VID3 VID2 VID1

VID0

2000 Jul 13

SCL

SDA

SL01229

Philips Semiconductors Product specification

NE1619HECETA4 Temperature and voltage monitor

TYPICAL OPERATING CIRCUIT

Remote Sensor:

SMBus

CLOCK DATA

Selectable A0/RESET/NTEST_OUT

Ground

µP On-Board PNP Transistor

See Note 1

or Discrete NPN Transistor

0.1 uF

10 k 10 k 100 k

2 1

System Power

Supplies

CCP

2.5 V

3.3 V

5.0 V

12.0 V

1. May be required in noisy environment, about 1 nF

15 14 13 12

NE1619

5 6 7 8

Ground

Processor Voltage

ID Code: VID0 VID1 VID2 VID3 VID4

SL01230

ABSOLUTE MAXIMUM RATINGS

PARAMETER MIN. MAX. UNIT

VDD to GND –0.3 6 V 12VIN to GND –0.3 18 V 5VIN, 3.3VIN, 2.5VIN, V Other pins to GND –0.3 VDD+0.3 V Input current at any pin –5 5 mA Package input current –20 20 mA Operating temperature range 0 +120 °C Maximum junction temperature +150 °C Storage temperature range –65 +150 °C

to GND –0.3 6 V

CCP

2000 Jul 13

Philips Semiconductors Product specification

NE1619HECETA4 Temperature and voltage monitor

Temp Error vs PC Board Track Resistance

20 15 10

–5 –10 –15 –20 –25

Remote Temp Error(deg. C)

–30

FROM D+ PIN TO GND

5 0

FROM D+ PIN TO VDD

1 10 100

Leakage Resistance (Mohm)

Figure 1. Temp Error vs PC Board Track Resistance

Temp Error vs D+D– Capacitance

0 –1 –2 –3 –4 –5 –6 –7 –8 –9

Temperature Error (deg. C)

–10

1 2.2 3.3 4.7 6.8 10 22 33 47

D+ to D– Capacitance (nF)

SL01245

SL01244

Standby Current vs Supply Voltage

100

Stdby Supply Current (uA)

0123456

Supply Voltage (V)

Figure 3. Standby Current vs Supply Voltage

Standby Current vs Temperature

Stdby Supply Current (uA)

–50 –25 0 25 50 75 100 125

VDD = 5.0V

VDD= 3.8V

VDD= 3.3V VDD= 2.8V

Temperatures (deg. C)

SL01243

SL01242

2000 Jul 13

Figure 2. Temp Error vs D+D– Capacitance

Figure 4. Standby Current vs Temperature

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