SA56004AD NXP Semiconductors, SA56004AD Datasheet - Page 20

• Manufacturer Part Number: SA56004AD
• Description: Board Mount Temperature Sensors I2C LOC +/- 2OC AND REM +/- 1OC TS
• Manufacturer: NXP Semiconductors

Specifications of SA56004AD

• Full Temp Accuracy: +/- 1 C, +/- 3 C
• Package / Case: SOT-96
• Digital Output - Bus Interface: I2C
• Digital Output - Number Of Bits: 11 bit
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Output Type: Digital
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: SA56004AD,112

NXP Semiconductors
8. Simplified system diagram
SA56004X_5
Product data sheet
Fig 10. Simplified system diagram
(1) Typical value; placed close to temperature sensor.
remote sensor
2N3904 (NPN), 2N3906 (PNP),
or similar standalone, ASIC or
microprocessor thermal diode
7.10.1 Serial interface reset
+5 V
shielded twisted pair
If the SMBus master attempts to reset the SA56004X while the SA56004X is controlling
the data line and transmitting on the data line, the SA56004X must be returned to a known
state in the communication protocol. This may be accomplished in two ways:
1. When the SDATA is LOW, the SA56004X SMBus state machine resets to the SMBus
2. When the SDATA is HIGH, the master initiates an SMBus START. The SA56004X will
idle state if SCLK is held LOW for more than 35 ms (maximum TIMEOUT period).
According to SMBus specification 2.0 , all devices are required to time-out when the
SCLK line is held LOW for 25 ms to 35 ms. Therefore, to insure a time-out of all
devices on the bus, the SCLK line must be held LOW for at least 35 ms.
respond properly to a SMBus START condition only during the data retrieving cycle.
After the START, the SA56004X will expect an SMBus Address byte.
2.2 nF (1)
FAN CONTROL
100 nF
V
CIRCUIT
V
DD
DD
R
10 k
Rev. 05 — 22 May 2008
1
2
3
4
V
D+
D
T_CRIT
DD
Digital temperature sensor with overtemperature alarms
SA56004X
SDATA
ALERT
SCLK
GND
8
7
6
5
10 k
R
R
10 k
R
10 k
CLOCK
DATA
INT
CONTROLLER
SA56004X
SMBus
© NXP B.V. 2008. All rights reserved.
V
DD
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