NE1617DS NXP Semiconductors, NE1617DS Datasheet - Page 13

• Manufacturer Part Number: NE1617DS
• Description: Board Mount Temperature Sensors I2C LOC +/- 2OC AND REM +/- 3OC TS
• Manufacturer: NXP Semiconductors

Specifications of NE1617DS

• Full Temp Accuracy: +/- 3 C, +/- 5 C
• Package / Case: SSOP-16
• Digital Output - Bus Interface: 2-Wire
• Maximum Operating Temperature: + 120 C
• Minimum Operating Temperature: 0 C
• Output Type: Digital
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: NE1617DS,112

S = Start condition
P = Stop condition
ACK = Acknowledged
NACK = Not acknowledged
Philips Semiconductors
Power-up default condition
Upon power-up reset (power is switched off-on), the NE1617 goes
into this default condition:
– Interrupt latch is cleared, the ALERT output is pulled high by the
– The auto-conversion rate is at 0.25 Hz; conversion rate data is
– Temperature limits for both channels are +127 C for high limit,
– Command pointer register is set to 00 for quickly reading the RIT.
Fault detection
The NE1617 has a fault detector to the diode connection. The
connection is checked when a conversion is initiated and the proper
flags are set if the fault condition has occurred.
Table 8. SMBus programming format
Write byte format (for writing data byte to the device register):
Read byte format (for reading data byte from the device register):
Send byte format (for sending command without data, such as one–shot command):
Receive byte format (for continuously reading from device register):
NOTES:
2004 Oct 06
D+ & D–
Opened
Shorted
S
S
S
S
external pull-up resistor.
02H.
and –55 C for low limit.
Temperature monitor for microprocessor systems
7 bits
device address
7 bits
device address
7 bits
device address
7 bits
device address
ADDRESS
ADDRESS
ADDRESS
ADDRESS
ALERT
OUTPUT
Low
Low
1 bit = 0
1 bit = 0
1 bit = 0
1 bit = 1
WR
WR
WR
RD
by
device
by
device
by
device
by
device
RET DATA
STORAGE
127 C
127 C
ACK
ACK
ACK
ACK
8 bits
device register
8 bits
device register
8 bits
device register
8 bits
from register
COMMAND
COMMAND
COMMAND
DATA
STATUS SET
FLAG
B2 & B4
B4
by
controller
NACK
by
device
by
device
by
device
ACK
ACK
ACK
13
8 bits
to register
S
P
P
SMBus interface
The device can communicate over a standard 2-wire serial interface
System Management Bus (SMBus) using the device pins SCLK and
SDATA. The device employs four standard SMBus protocols: Write
Byte, Read Byte, Send Byte and Receive Byte. Data formats of
those protocols are shown in Table 8 with following notifications:
– The SMBus master initiates data transfer by establishing a start
– Data is sent over the serial bus in sequence of 9 clock pulses
– The 7-bit slave address is equivalent to the selected address of
– The command byte is equivalent to the selected command of the
– The send byte format is often used for the one-shot conversion
– The receive byte format is used for quicker transfer data from a
DATA
condition (S) and terminates data transfer by generating a stop
condition (P).
according to each 8-bit data byte followed by 1-bit status of the
device acknowledgement.
the device.
device register
command.
device reading register which was previously selected by a read
byte format.
7 bits
device address
ADDRESS
by
device
ACK
1 bit = 1
P
RD
by
device
ACK
8 bits
from
register
DATA
Product specification
NE1617
by
controller
NACK
P