Philips Semiconductors expands its
standard analog portfolio with new
temperature sensors in small
16 lead SSOP package
Temperature
Sensors
NE1617A, NE1618, NE1619
The Philips Semiconductors temperature sensor family is intended
for use in personal computers where thermal monitoring of
hardware and electrical components is critical. These devices are
capable of measuring the internal temperature of µProcessors that
incorporate an embedded diode. These sensors also incorporate
an embedded diode of their own to monitor internal ambient
temperatures. The associated devices can communicate over a
standard 2-wire serial interface using internal device pins SCLK
and SDATA. These devices employ 4 SMBus protocols: Write
Byte, Read Byte, Send Byte and Receive Byte. The NE1617A,
NE1618 and NE1619 are configured as slaves on the SMBus
system. The external master µProcessor is responsible for initiating
start, stop, and clock signals for SMBus communications. Data
is serially transmitted in groups of 9 bits using 9 clock pulses,
including 8-bit data byte followed by a 1-bit acknowledgement.
The NE1617A is an accurate 2-channel temperature monitor
that is capable of measuring internal and remote temperatures.
The NE1617A and NE1618 are capable of up to nine devices per
bus; the NE1619 is capable of two. Normal operating conditions
require the NE1617A and NE1618 to update the temperature
data at the programmed rate, which is selectable from 125 ms
to 16 seconds. These devices also have an internal one-shot
command that will force a temperature reading if needed. The
chip contains a programmable alarm for over/under temperature
fault conditions.
NE1618 can be substituted for the NE1617A and has an extra
mode for improved thermal tracking. This device can be operated
in extended mode for resolution of 0.125ºC. The extended mode
of operation only applies to the remote sensor.
The NE1619 has evolved beyond the NE1617A and NE1618.
This device is able to monitor temperature and supply voltages,
both internal and remote. This device also has programmable
temperature and voltage limits used to control internal alarms.
The NE1619 uses a consistent conversion rate of approximately
500 ms. An A/D converter is included onboard, which can be
used for operation and data collection.
These temp sensors operate at a temp range of 0 > to +120º C.
Key Features
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The 1617A is a replacement for the MAX1617 and ADM1021
Monitors internal and remote temperatures
No calibration required
Programmable alarm, for over/under temperature conditions.
Programmable temperature/voltage limits, to control internal
alarms – NE1619
SMBus 2-wire serial interface
3 V to 5.5 V supply range – NE1617A/ NE1618
2.8 V to 5.5 V supply range – NE1619
Small 16-lead SSOP package
Desktop computers
Notebook computers
Smart battery packs
Industrial controllers
Telecom equipment
Applications
NE1617A NE1618
NE1619
NE1617A, NE1618, NE1619
SPECIFICATIONS (Typical)
Features
Temperature Resolution
Accuracy Local (On-Board) Sensor
Accuracy Remote Sensor
Supply Range
Supply Current Operation Mode
Supply Current Standby Mode
Packaging
1
Extended
2
Compatible
Temperature Sensors
NE1617A
1°C
±2°C
±3°C
3 V to 5.5 V
70 µA
3 µA
16 lead SSOP
NE1618
1°C or 0.125°C
1
±2°C
±3.0°C or ±1°C
1
3 V to 5.5 V
80 µA
3 µA
16 lead SSOP
NE1619
2
1°C
±2°C
±3°C
2.8 V to 5.5 V
250 µA
100 µA
16 lead SSOP
Mode of Operation.
with Intel “Heceta 4” specifications and reference designs utilizing it.
D
E
A
X
c
y
H
E
v
M
A
Z
16
9
A
2
A
1
(A
3
)
θ
L
p
L
1
e
b
p
8
w
M
detail X
A
0
2.5
scale
5 mm
DIMENSIONS (mm are the original dimensions)
UNIT
mm
Note
1. Plastic or metal protrusions of 0.20 mm maximum per side are not included.
OUTLINE
VERSION
SOT519-1
REFERENCES
IEC
JEDEC
EIAJ
EUROPEAN
PROJECTION
A
max.
1.73
A
1
0.25
0.10
A
2
1.55
1.40
A
3
0.25
b
p
0.31
0.20
c
0.25
0.18
D
(1)
5.0
4.8
E
(1)
4.0
3.8
e
0.635
H
E
6.2
5.8
L
1.0
L
p
0.89
0.41
v
0.2
w
0.18
y
0.09
Z
(1)
0.18
0.05
θ
8
0
o
o
ISSUE DATE
99-05-04
SSOP16: plastic shrink small outline package; 16 leads; body width 3.9 mm; lead pitch 0.635 mm
For more information, contact your Philips Semiconductors distributor or www.semiconductors.philips.com/analog
North America
Tel: 1 800 234-7381
Internet:
www.semiconductors.philips.com/analog
Europe
Fax: +31 79 3685126
Asia
Fax: 886 2 2134-2941
Japan/Korea
Fax: +81-3-3740-5057
Internet (in Japanese):
www.philips.co.jp/semicon/
© Philips Electronics N.V. 2000
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