ADM1032
http://onsemi.com
4
Table 4. ELECTRICAL CHARACTERISTICS
Parameter UnitMaxTypMinConditions
Serial Bus Timing (Note 2)
Clock Frequency
− − 400 kHz
SMBus Timeout (Note 3) − 25 64 ms
SCLK Clock Low Time, t
LOW
t
LOW
between 10% Points 1.3 − −
ms
SCLK Clock High Time, t
HIGH
t
HIGH
between 90% Points 0.6 − −
ms
Start Condition Setup Time, t
SU:STA
600 − − ns
Start Condition Hold Time, t
HD:STA
Time from 10% of SDATA to 90% of SCLK 600 − − ns
Stop Condition Setup Time, t
SU:STO
Time from 90% of SCLK to 10% of SDATA 600 − − ns
Data Valid to SCLK Rising Edge Time,
t
SU:DAT
Time for 10% or 90% of SDATA to 10% of SCLK 100 − − ns
Data Hold Time, t
HD:DAT
300 − − ns
Bus Free Time, t
BUF
Between Start/Stop Condition 1.3 − −
ms
SCLK, SDATA Rise Time, t
R
− − 300 ns
SCLK, SDATA Fall Time, t
F
− − 300 ns
1. See Table 10 for information on other conversion rates.
2. Guaranteed by design, not production tested.
3. The SMBus timeout is a programmable feature. By default, it is not enabled. Details on how to enable it are available in the Serial Bus Interface
section.
Figure 2. Serial Bus Timing Diagram
P
S
t
SU; DAT
t
HIGH
t
F
t
HD; DAT
t
R
t
LOW
t
SU; STO
PS
SCLK
SDATA
t
BUF
t
HD; STA
t
HD; STA
t
SU; STA
