ADT7473 Analog Devices, Inc., ADT7473 Datasheet - Page 5

• Manufacturer Part Number: ADT7473
• Description: Dbcool Remote Thermal Monitor And Fan Controller
• Manufacturer: Analog Devices, Inc.

Parameter
DIGITAL INPUT LOGIC LEVELS (TACH INPUTS)
DIGITAL INPUT LOGIC LEVELS (THERM) ADTL+
D IGITAL INPUT CURRENT
SERIAL BUS TIMING
1
TIMING DIAGRAM
Serial management bus (SMBus) timing specifications are guaranteed by design and are not production tested.
A
h
rising edge.
igh voltages up to V
ll voltages are measured with respect to GND, unless otherwise noted. Typicals are at T
Input High Voltage, V
Input Low Voltage, V
Hysteresis
Input High Voltage, V
Input Low Voltage, V
Input High Current, I
Input Low Current, I
Input Capacitance, C
Clock Frequency, f
Glitch Immunity, t
Bus Free Time, t
SCL Low Time, t
SCL High Time, t
SCL, SDA Rise Time, t
SCL, SDA Fall Time, t
Data Setup Time, t
Detect Clock Low Timeout, t
SDA
SCL
P
t
BUF
LOW
BUF
HIGH
MAX
SW
SCLK
SU;DAT
, even when device is operating down to V
S
IL
f
IL
IL
IH
IN
r
IH
IH
t
HD; STA
TIMEOUT
t
LOW
t
R
t
HD; DAT
Min
2.0
−0.3
10
4.7
4.7
4.0
250
15
t
HIGH
Figure 2. Serial Bus Timing Diagram
MIN
t
. Timing specifications are tested at logic levels of V
F
t
SU; DAT
Rev. A | Page 5 of 76
Typ
0.5
±1
±1
5
A
= 25°C and represent most likely parametric norm. Logic inputs accept input
Max
3.6
0.8
0.4
400
50
50
1,000
300
35
0.75 × V
S
CC
t
SU; STA
Unit
V
V
V
V
V p-p
V
V
µA
µA
pF
k
ns
µs
µs
µs
ns
µs
ns
ms
t
HD; STA
Hz
Test Conditions/Comments
Maximum input voltage
Minimum input voltage
V
V = 0
See Figur e 2
Can be optionally disabled
IN
IN
= V
IL
= 0.8 V for a falling edge and V
CC
t
SU; STO
P
ADT7473
IH
= 2.0 V for a