NE1617ADS,112 NXP Semiconductors, NE1617ADS,112 Datasheet - Page 8
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NE1617ADS,112
Manufacturer Part Number
NE1617ADS,112
Description
IC TEMP MONITOR 16SSOP
Manufacturer
NXP Semiconductors
Datasheet
1.NE1617ADS118.pdf
(27 pages)
Specifications of NE1617ADS,112
Function
Temp Monitoring System (Sensor)
Topology
ADC, Multiplexer, Register Bank
Sensor Type
External & Internal
Sensing Temperature
-55°C ~ 125°C, External Sensor
Output Type
SMBus™
Output Alarm
Yes
Output Fan
No
Voltage - Supply
3 V ~ 5.5 V
Operating Temperature
-55°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
16-QSOP
Temperature Sensor Function
Temp Sensor
Interface Type
Serial (2-Wire)
Operating Temperature (min)
0C
Operating Temperature (max)
125C
Operating Temperature Classification
Military
Operating Supply Voltage (min)
3V
Operating Supply Voltage (typ)
3.3/5V
Operating Supply Voltage (max)
5.5V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
935268119112
NE1617ADS
NE1617ADS
NE1617ADS
NE1617ADS
NXP Semiconductors
NE1617A_4
Product data sheet
8.3.1 Low power standby modes
8.3.2 Configuration register
8.3.3 External and internal temperature registers
Upon POR, the device is reset to its normal free-running auto-conversion operation mode.
The device can be put into standby mode by either using hardware control (connect the
STBY pin to LOW for hardware standby mode) or using software control (set bit 6 of the
configuration register to HIGH for software standby mode). When the device is put in
either one of the standby modes, the supply current is reduced to less than 10 A if there
is no SMBus activity, all data in the device registers are retained and the SMBus interface
is still alive to bus communication. However, there is a difference in the device ADC
conversion operation between hardware standby and software standby modes. In
hardware standby mode, the device conversion is inhibited and the one-shot command
does not initiate a conversion. In software standby mode, the one-shot command will
initiate a conversion for both internal and external channels.
If a hardware standby command is received when the device is in normal mode and a
conversion is in progress, the conversion cycle will stop and data in reading temperature
registers will not be updated.
The configuration register is used to mask the Alert interrupt and/or to put the device in
software standby mode. Only two bits of this register (bit 6 and bit 7) are used as listed in
Table
bit is set to logic 1, and bit 6 is used to activate the standby software mode when this bit is
set to logic 1.
This register can be written or read using the commands of registers named WC and RC
accordingly. Upon Power-On Reset (POR), both bits are reset to zero.
Table 5.
Results of temperature measurements after every ADC conversion are stored in two
registers: Internal Temp register (RIT) for internal or local diode temperature, and External
Temp register (RET) for external or remote diode temperature. These registers can be
only read over the SMBus. The reading temperature data is in 2's complement binary form
consisting of 7-bit data and 1-bit sign (MSB), with each data count represents 1 C, and
the MSB bit is transmitted first over the serial bus. The contents of those two registers are
updated upon completion of each ADC conversion.
temperature and data.
Bit
7 (MSB)
6
5 to 0
5. Bit 7 is used to mask the device ALERT output from Alert interruption when this
Symbol
MASK
RUN/STOP 0
-
Configuration register bit assignments
POR state
0
n/a
Rev. 04 — 30 July 2009
Temperature monitor for microprocessor systems
Function
Mask ALERT interrupt. Interrupt is enabled when this bit
is LOW, and disabled when this bit is HIGH.
Standby or run mode control. When LOW, running mode
is enabled; when HIGH, standby mode is initiated.
reserved
Table 6
shows some values of the
NE1617A
© NXP B.V. 2009. All rights reserved.
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