ADT7475 Analog Devices, Inc., ADT7475 Datasheet - Page 4

• Manufacturer Part Number: ADT7475
• Description: Dbcool Remote Thermal Monitor And Fan Controller
• Manufacturer: Analog Devices, Inc.

ADT7475
Parameter
DIGITAL INPUT LOGIC LEVELS (TACH INPUTS)
DIGITAL INPUT LOGIC LEVELS (THERM) ADTL+
DIGITAL INPUT CURRENT
SERIAL BUS TIMING
1
2
TIMING DIAGRAM
All voltages are measured with respect to GND, unless otherwise specified. Typicals are at T
input high voltages of up to V
V
SMBus timing specifications are guaranteed by design and are not production tested.
IH
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
= 2.0 V for a rising edge.
SDA
SCL
P
BUF
t
LOW
BUF
HIGH
2
SW
SCLK
SU: DAT
S
IL
F
IL
IL
IH
IN
R
IH
IH
t
MAX
HD: STA
, even when the device is operating down to V
TIMEOUT
t
LOW
t
R
t
HD: DAT
t
HIGH
Figure 2. Serial Bus Timing Diagram
t
F
t
SU: DAT
Rev. B | Page 4 of 68
Min
2.0
−0.3
10
4.7
4.7
4.0
250
15
MIN
. Timing specifications are tested at logic levels of V
Typ
0.5
±1
±1
5
A
= 25°C and represent the most likely parametric norm. Logic inputs accept
S
Max
3.6
0.8
0.4
400
50
50
1000
300
35
0.75 ×
t
SU: STA
V
CC
t
HD: STA
Unit
V
V
V
V
V p-p
V
V
μA
μA
pF
kHz
ns
μs
μs
μs
ns
μs
ns
ms
Test Conditions/Comments
Maximum input voltage
Minimum input voltage
V
V
See Figure 2
Can be optionally disabled
IN
IN
= V
= 0 V
t
SU: STO
CC
IL
= 0.8 V for a falling edge and
P