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NE1617DS データシート(PDF) 2 Page - NXP Semiconductors

部品番号 NE1617DS
部品情報  Temperature monitor for microprocessor systems
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メーカー  PHILIPS [NXP Semiconductors]
ホームページ  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

NE1617DS データシート(HTML) 2 Page - NXP Semiconductors

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Philips Semiconductors
Product specification
NE1617
Temperature monitor for microprocessor systems
2
1999 Mar 19
853–2144 21065
FEATURES
Replacement for Maxim MAX1617 and Analog Devices ADM1021
Monitors local and remote temperature
Accuracy
± 2°C local (on-chip) sensor
± 3°C remote sensor
No calibration required
Programmable over/under temperature alarm
SMBus 2-wire serial interface
3V to 5.5V supply range
70µa supply current in operating mode
3µa (typical) supply current in standby mode
Small 16–lead QSOP package
APPLICATIONS
Desktop computers
Notebook computers
Smart battery packs
Industrial controllers
Telecom equipment
DESCRIPTION
The NE1617 is an accurate two-channel temperature monitor. It
measures the temperature of itself and the temperature of a remote
sensor. The remote sensor is a diode connected transistor. This can
be in the form of either a discrete NPN/PNP, such as the
2N3904/2N3906, or a diode connected PNP built into another die,
such as is done on some INTEL microprocessors.
The temperature of both the remote and local sensors is stored in a
register that can be read via a 2-wire SMBus. The temperatures are
updated at a rate that is programmable via the SMBus (the average
supply current is dependent upon the update rate—the faster the
rate, the higher the current).
In addition to the normal operation, which is to update the
temperature at the programmed rate, there is a one shot mode that
will force a temperature update.
There is also an alarm that senses either an over or under
temperature condition. The trip points for this alarm are also
programmable.
The device can have 1 of 9 addresses (determined by 2 address
pins), so there can be up to 9 of the NE1617 on the SMBus.
It can also be put in a standby mode (in order to save power). This
can be done either with software (over the SMBus) or with hardware
(using the STANDBY pin).
PIN CONFIGURATION
9
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
TEST
VDD
D+
D–
TEST
ADD1
GND
GND
TEST
STBY
SCLK
TEST
SDATA
ALERT
ADD0
TEST
SL01202
Figure 1. Pin configuration
PIN FUNCTION DESCRIPTION
PIN #
FUNCTION
DESCRIPTION/COMMENTS
1
TEST
Factory use only1
2
VDD
Positive supply2
3
D+
Positive side of remote sensor
4
D–
Negative side of remote sensor
5
TEST
Factory use only1
6
ADD1
Device address pin (3-State)
7
GND
Ground
8
GND
Ground
9
TEST
Factory use only1
10
ADD0
Device address pin (3-State)
11
ALERT
Open drain output used as
interrupt or SMBus alert
12
SDATA
SMBus serial data input/output
open drain
13
TEST
Factory use only1
14
SCLK
SMBus clock input
15
STBY
Hardware standby input pin
HIGH = normal operating mode
LOW = standby mode
16
TEST
Factory use only1
NOTES:
1. These pins should either float or be tied to ground.
2. VDD pin should be decoupled by a 0.1µF capacitor.
ORDERING INFORMATION
PART NUMBER
PACKAGE
DRAWING NUMBER
NE1617DS
16-lead QSOP package
SOT519–1


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