ADM1021A
Rev. 7 | Page 5 of 19 | www.onsemi.com
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
00056-002
1
2
3
4
5
6
7
8
NC = NO CONNECT
16
15
14
13
12
11
10
9
V
DD
D+
D–
GND
ADD1
NC
NC
STBY
SCLK
NC
ADD0
GND NC
ALERT
SDATA
NC
TOP VIEW
(Not to Scale)
ADM1021A
Figure 2. Pin Configuration
Table 3. Pin Function Descriptions
Pin No. Mnemonic Description
1, 5, 9, 13, 16 NC No Connect.
2 V
DD
Positive Supply, 3 V to 5.5 V.
3 D+ Positive Connection to Remote Temperature Sensor.
4 D− Negative Connection to Remote Temperature Sensor.
6 ADD1 Three-State Logic Input, Higher Bit of Device Address.
7, 8 GND Supply 0 V Connection.
10 ADD0 Three-State Logic Input, Lower Bit of Device Address.
11
ALERT
Open-Drain Logic Output Used as Interrupt or SMBus Alert.
12 SDATA Logic Input/Output, SMBus Serial Data. Open-Drain Output.
14 SCLK Logic Input, SMBus Serial Clock.
15
STBY
Logic Input Selecting Normal Operation (High) or Standby Mode (Low).
ESD CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on
the human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.
00056-003
P
S
P
t
HD;STA
t
SU;STA
t
SU;DAT
t
HIGH
t
F
t
HD;DAT
t
R
t
LOW
t
HD;STA
S
SCL
SD
t
BUF
t
S
U
;
S
T
O
Figure 3. Diagram for Serial Bus Timing
