NE1617ADS NXP Semiconductors, NE1617ADS Datasheet - Page 12

• Manufacturer Part Number: NE1617ADS
• Description: Board Mount Temperature Sensors I2C LOC +/- 2OC AND REM +/- 3OC TS
• Manufacturer: NXP Semiconductors

Specifications of NE1617ADS

• Full Temp Accuracy: +/- 3 C, +/- 5 C
• Package / Case: SSOP-16
• Digital Output - Bus Interface: Serial (2-Wire)
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 55 C
• Output Type: Digital
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: NE1617ADS,112

NXP Semiconductors
NE1617A_4
Product data sheet
Fig 3.
S
START condition
a. Write byte format (for writing data byte to the device register)
b. Read byte format (for reading data byte from the device register)
d. Receive byte format (for continuously reading from device register)
c. Send byte format (for sending command without data, such as one-shot command)
7 bits device address
SMBus programming format
address
8.6 SMBus interface
S
START condition
7 bits device address
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
R/W
•
•
•
•
•
•
0
address
The SMBus master initiates data transfer by establishing a START condition (S) and
terminates data transfer by generating a STOP condition (P).
Data is sent over the serial bus in sequence of 9 clock pulses according to each 8-bit
data byte followed by 1-bit status of the device acknowledgement.
The 7-bit slave address is equivalent to the selected address of the device.
The command byte is equivalent to the selected command of the device register.
The ‘send byte’ format is often used for the one-shot conversion command.
The ‘receive byte’ format is used for quicker transfer data from a device reading
register that was previously selected by a read byte format.
ACK
acknowledged
by device
S
START condition
S
START condition
8 bits device register
7 bits device address
7 bits device address
R/W
command
address
address
0
ACK
acknowledged
by device
acknowledged
by device
8 bits device register
Figure 3
Rev. 04 — 30 July 2009
R/W
R/W
command
ACK
0
1
ACK
ACK
acknowledged
by device
acknowledged
by device
S
(re)START
condition
with following notifications:
7 bits device address
8 bits device register
8 bits from register
Temperature monitor for microprocessor systems
command
address
ACK
data
acknowledged
by device
acknowledged
acknowledged
by controller
by device
8 bits to register
R/W
NACK
1
data
ACK
not
ACK
acknowledged
by device
acknowledged
002aad525
002aad526
P
STOP
condition
P
STOP
condition
by device
8 bits from register
ACK
data
002aad523
P
STOP
condition
acknowledged
by controller
NE1617A
© NXP B.V. 2009. All rights reserved.
NACK
not
002aad524
P
STOP
condition
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