Philips ne1619 DATASHEETS

INTEGRATED CIRCUITS

NE1619

HECETA 4

Temperature and voltage monitor

Product specification

2000 Jul 13

P s

on o s

Philips Semiconductors	Product specification
HECETA4 Temperature and voltage monitor	NE1619

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.

FEATURES

•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, VCCP, VDD

•VIN accuracy of ±2% of full scale

•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 ªHeceta 4º specification and reference designs utilizing it

APPLICATIONS

•System thermal and hardware monitor

•Desktop computers

•Notebook computers

•Industrial controllers

•Telecom equipment

ORDERING INFORMATION

PART NUMBER	PACKAGE		DRAWING NUMBER
NE1619	16-lead QSOP package		SOT519-1

2000 Jul 13

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853-2202 24122

Philips Semiconductors	Product specification
HECETA4 Temperature and voltage monitor	NE1619

PINNING

Pin Configuration

		SDA	1		16		A0/RESET/NTEST_OUT
		SCL	2		15		VCCPVIN
		GND	3		14		2.5VIN
	VDD/3.3VSB		4		13		3.3VIN
		VID0	5		12		5VIN
		VID1	6		11		12VIN/VID4
		VID2	7		10		D+
		VID3	8		9		D±/NTEST_IN
					SL01228
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
						required. This pin also serves as the analog input to monitor the VDD voltage level.
5		VID0				Digital Input. For Voltage ID readouts from the processor. This value is read into the VID status
						register (LSB bit).
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
						analog input. If this pin is held high at power-up, for digital input, it enables the NAND-TREE test mode.
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
						programmable to be a digital input for voltage ID readouts from the processor. Its state is read into the
						VID4 status register.
12		5VIN				Analog Input. For monitoring the +5 V supply.
13		3.3VIN				Analog Input. For monitoring the +3.3 V supply.
14		2.5VIN				Analog Input. For monitoring the +2.5 V supply.
15		VCCPVIN				Analog Input. For monitoring the processor voltage supply (0 to 3.0 V)
16						Digital I/O. At power-up, the logic input of this pin defines the LSB bit of the device slave address.
		A0/RESET/NTEST_IN
						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.

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Philips Semiconductors	Product specification
HECETA4 Temperature and voltage monitor	NE1619

FUNCTIONAL BLOCK DIAGRAM

Local Temp

Control

Configuration

Command

Address Decoder

A0/

Sensor

Logic

Register

Pointer Register

and Register

Reset #/

NTEST_OUT

D+

Temp

Local Temp

Local Temp

Local Temp

Status

D-/

Mux

RDG Register

HL Register

LL Register

Register 1

NTEST_IN

A-to-D

Remote Temp

Remote Temp

Remote Temp

Status

GND

Converter

RDG Register

HL Register

LL Register

Register 2

Voltage

VDD Reading

VDD HL

VDD LL

Company #

VDD

Mux

Register

Register

Register

Register

VCCP Reading

VCCP HL

VCCP LL

Step Version

VCCVIN

Register

Register

Register

Register

2.5 VIN

Vin

2.5 V Reading

2.5 V HL

2.5 V LL

Test

Attenuators

Register

Register

Register

Register

3.3 VIN

5 VIN

3.3 V Reading

3.3 V HL

3.3 V LL

Reset Pulse

Register

Register

Register

Circuit

12 VIN/

Switch

5 V Reading

5 V HL

5 V LL

VID 0-3

Register

Register

Register

Register

VID4

VID3

VID2

Vid4

12 V Reading

12 V HL

12 V LL

VID1

Register

Register

Register

Register

VID0

NTEST

SMBus Interface

Circuit

SCL	SDA
		SL01229

2000 Jul 13

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Philips Semiconductors	Product specification
HECETA4 Temperature and voltage monitor	NE1619

TYPICAL OPERATING CIRCUIT

Remote Sensor:

0.1 uF			VDD
		10 k 10 k	100 k
Ground		4	SMBus:
μP On-Board PNP Transistor		2	CLOCK
	10	1	DATA
See
Note 1
	9		Selectable
or Discrete NPN Transistor		16
			A0/RESET/NTEST_OUT
System Power		NE1619	Processor Voltage
Supplies			ID Code:
VCCP	15	5	VID0
2.5 V	14	6	VID1
3.3 V	13	7	VID2
5.0 V	12	8	VID3
12.0 V	11	3	VID4
		Ground

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

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, VCCP to GND	±0.3	6	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

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Philips Semiconductors	Product specification
HECETA4 Temperature and voltage monitor	NE1619

Temp Error vs PC Board Track Resistance

	20
	15
	10
	5	FROM D+ PIN TO GND
C)
	0
Error(deg.
	±5
	±10
Temp	±15	FROM D+ PIN TO VDD
	±20
Remote
	±25
	±30
	1	10	100

Leakage Resistance (Mohm)

SL01245

Figure 1. Temp Error vs PC Board Track Resistance

Temp Error vs D+D± Capacitance

	0
	±1
	±2
C)	±3
(deg.	±4
	±5
Error
	±6
	±7
Temperature
	±8
	±9
	±10
	1	2.2	3.3	4.7	6.8	10	22	33	47

D+ to D± Capacitance (nF)

SL01244

Standby Current vs Supply Voltage

	100
	80
(uA)	60
Current
	40
Supply
Stdby	20
	0
	0	1	2	3	4	5	6

Supply Voltage (V)

SL01243

Figure 3. Standby Current vs Supply Voltage

Standby Current vs Temperature

	50
(uA)	40
					VDD = 5.0V
Current	30
					VDD= 3.8V
Supply	20				VDD= 3.3V
				VDD= 2.8V
Stdby	10
	0

±50 ±25 0 25 50 75 100 125

Temperatures (deg. C)

SL01242

Figure 2. Temp Error vs D+D± Capacitance

Figure 4. Standby Current vs Temperature

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