NE1619DS,112 NXP Semiconductors, NE1619DS,112 Datasheet - Page 15

• Manufacturer Part Number: NE1619DS,112
• Description: IC TEMP MONITOR 16SSOP
• Manufacturer: NXP Semiconductors

Specifications of NE1619DS,112

• Function: Temp Monitoring System (Sensor)
• Topology: ADC, Multiplexer, Register Bank
• Sensor Type: External & Internal
• Sensing Temperature: 0°C ~ 125°C, External Sensor
• Output Type: SMBus™
• Output Alarm: Yes
• Output Fan: No
• Voltage - Supply: 2.8 V ~ 5.5 V
• Operating Temperature: 0°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 16-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 568-4228-5; 935264532112; NE1619DS; NE1619DS

Philips Semiconductors
SMBus interface protocol
The NE1619 can communicate over a compatible 2-wire serial
interface SMBus using the two device pins SCL and SDA. The
device employs three standard SMBus protocols: Write Byte, Read
Byte and Receive byte.
Data formats of those protocols are shown below with following notices:
2004 Oct 05
The SMBus controller 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 for
each 8-bit data byte followed by 1-bit status of the device
acknowledgement (A).
HECETA4 Temperature and voltage monitor
Write Byte Format:
Read Byte Format:
Receive Byte Format:
SDA (continued)
SDA (continued)
SCL (continued)
SCL (continued)
SDA
SDA
SDA
SCL
SCL
SCL
RESTART
S
S
S
S
D7
1
0
0
1
0
1
0
1
1
DATA TO BE WRITTEN TO REGISTER
D6
2
1
1
2
1
2
1
2
2
DEVICE ADDRESS
DEVICE ADDRESS
DEVICE ADDRESS
DEVICE ADDRESS
Figure 13. NE1619 SMBus interface protocols
D5
3
0
0
3
0
3
0
3
3
D4
4
1
1
4
1
4
1
4
4
D3
5
1
1
5
5
5
5
1
1
D2
6
0
0
6
0
6
0
6
6
D1
a0
a0
a0
7
a0
7
7
7
7
15
D0
R
W
R
8
W
(end)
8
8
8
8
The 7-bit slave address is replaced by the selected address of the
device.
The command byte is replaced by the selected command of the
device register.
The receive byte format is used for quickly transfer data from a
reading register which was previously selected by a read.
During the transition between start and stop conditions, data must
be stable and valid when the SCL is high.
9
A
A
A
A
A
9
9
9
9
D7
D7
D7
D7
1
1
1
1
P
D6
D6
DATA FROM DEVICE REGISTER
D6
DATA FROM DEVICE REGISTER
D6
DEVICE REGISTER COMMAND
2
2
2
2
DATA REGISTER COMMAND
D5
D5
D5
D5
3
3
3
3
D4
D4
D4
D4
4
4
4
4
D3
D3
D3
D3
5
5
5
5
D2
D2
D2
D2
6
6
6
6
D1
D1
D1
D1
7
7
7
7
D0
D0
D0
D0
8
8
8
8
NA
NA
9
A
9
A
9
9
Product data sheet
NE1619
P
P
P
STOP
STOP
(TO NEXT)
(TO NEXT)
SL01233
(TO NEXT)
(TO NEXT)