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Details, datasheet, quote on part number:NE1618DS
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| Part: | NE1618DS |
| Category: | Power Management => Supervisory Circuits => System Supervisors/Reset => Temperature sensors |
| Description: | NE1618; Temperature Monitor For Microprocessor Systems;; Package: SOT519-1 (SSOP16) |
| Company: | Philips Semiconductors |
| Datasheet: | Download NE1618DS datasheet File size : 140 kB |
| Request For quote: | Find where to buy NE1618DS
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Datasheet text preview:
INTEGRATED CIRCUITS
NE1618 Temperature monitor for microprocessor systems
Product data Supersedes data of 2001 Oct 03 File under Integrated Circuits, IC11 Handbook 2002 Jan 04
Philips Semiconductors
Philips Semiconductors
Product data
Temperature monitor for microprocessor systems
NE1618
FEATURES
· Monitors local and remote temperature · Accuracy
± 2 °C local (on-chip) sensor ± 1.5 °C remote sensor with 1 °C resolution ± 1.0 °C remote sensor with 0.125 °C resolution
programmable. The device can have 1 of 9 addresses (determined by 2 address pins), so there can be up to 9 of the NE1618 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 STBY pin).
· No calibration required · Programmable over/under temperature alarm · SMBus 2-wire serial interface · 3 V to 3.6 V supply range · 80 µA supply current in operating mode · 3 µA (typical) supply current in standby mode · Small 16-lead QSOP package
APPLICATIONS
PIN CONFIGURATION
TEST1 VDD 1 2 16 TEST16 15 STBY 14 SCLK
D+ 3 D TEST5 ADD1 GND GND 4 5 6 7 8
NE1618
13 TEST13 12 SDATA 11 ALERT 10 ADD0 9 TEST9
· Desktop computers · Notebook computers · Smart battery packs · Industrial controllers · Telecom equipment
DESCRIPTION
The NE1618 is an accurate two-channel temperature monitor. It measures the temperature of itself and the temperature of a remote sensor. It can replace the NE1617 for a more precise measurement to the remote temperature when it operates in extended mode. The remote sensor is a diode connected transistor being 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 are stored in the registers that can be read via a 2-wire SMBus. The data in the temp reading registers are updated at the end of every data conversion when the conversion is enable. At all time, data conversion is initiated automatically in the rate defined by the programmable data in the conversion rate register. However, a conversion can be forced to occur immediately by a one-shot programming. The local temp is always measured with a resolution of 1.0 °C but the remote temp can be measured in either one of two modes: extended mode with a resolution of 0.125 °C and basic mode with a resolution of 1.0 °C. The mode is set up automatically according to the programmable data stored in the conversion rate register. (See Table 6). Extended mode is set when the conversion rate is slow (rate 0.7 Hz or less) and normal mode is set when the rate is high (conversion rate of 2, 4, or 8 Hz). There is also an alarm that senses either an over or under temperature condition. The trip points for this alarm are also
SL01238
Figure 1. Pin configuration
PIN DESCRIPTION
PIN # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 FUNCTION TEST1 VDD D+ D TEST5 ADD1 GND GND TEST9 ADD0 ALERT SDATA TEST13 SCLK STBY DESCRIPTION/COMMENTS Factory use only1 Positive supply2 Positive side of remote sensor Negative side of remote sensor Factory use only1 Device address pin (3-State) Ground Ground Factory use only1 Device address pin (3-State) Open drain output used as interrupt or SMBus alert SMBus serial data input/output open drain Factory use only1 SMBus clock input Hardware standby input pin HIGH = normal operating mode LOW = standby mode Factory use only1
16
TEST16
NOTES: 1. These pins should either floating or be tied to ground. 2. VDD pin should be decoupled by a 0.1 µF capacitor.
ORDERING INFORMATION
PART NUMBER NE1618DS NOTE: 1. Also called "SSOP16". 2002 Jan 04 2 8532299 27510 PACKAGE 16-lead QSOP package1 DRAWING NUMBER SOT5191
Philips Semiconductors
Product data
Temperature monitor for microprocessor systems
NE1618
FUNCTIONAL BLOCK DIAGRAM
STDBY
ONE-SHOT REGISTER CONFIGURATION REGISTER COMMAND POINTER REGISTER
LOCAL TEMP SENSOR
CONTROL LOGIC
CONVERSION RATE REGISTER
LOCAL TEMP DATA REGISTER
LOCAL TEMP HIGH THRESHOLD
LOCAL TEMP HIGH LIMIT REGISTER
EXTENDED TEMP REGISTER D+ D ANALOG MUX A-TO-D CONVERTER REMOTE TEMP DATA REGISTER
LOCAL LOW TEMP THRESHOLD
LOCAL TEMP LOW LIMIT REGISTER
REMOTE HIGH TEMP THRESHOLD
REMOTE TEMP HIGH LIMIT REGISTER
ADD1 ADD0
ADDRESS DECODER
REMOTE LOW TEMP THRESHOLD
REMOTE TEMP LOW LIMIT REGISTER
ALERT
INTERRUPT MASKING
STATUS REGISTER
DEVICE ID
DEVICE REV SMBUS INTERFACE
VDD GND
GND
TEST1
TEST5
TEST9
TEST13
TEST16
SCLK
SDATA
SL01236
Figure 2. Functional block diagram.
2002 Jan 04
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