Datasheet
SA56004X All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 7 — 25 February 2013 28 of 43
NXP Semiconductors
SA56004X
Digital temperature sensor with overtemperature alarms
[1] The switching characteristics of the SA56004X fully meet or exceed all parameters specified in SMBus version 2.0. The following
parameters specify the timing between the SCLK and SDATA signals in the SA56004X. They adhere to, but are not necessarily
specified as the SMBus specifications.
[2] Delay from SDATA STOP to SDATA START.
[3] Delay from SDATA START to first SCLK HIGH-to-LOW transition.
[4] Delay from SCLK HIGH-to-LOW transition to SDATA edges.
[5] Delay from SDATA edges to SCLK LOW-to-HIGH transition.
[6] Delay from SCLK LOW-to-HIGH transition to restart SDATA.
[7] Delay from SCLK HIGH-to-LOW transition to SDATA STOP condition.
[8] LOW period for reset of SMBus.
Table 21. SMBus interface characteristics
V
DD
= 3.0 V to 3.6 V; T
amb
=
40
C to +125
C; unless otherwise specified.
These specifications are guaranteed by design and not tested in production.
Symbol Parameter Conditions Min Typ Max Unit
V
IH
HIGH-level input voltage SCLK, SDATA; V
DD
= 2.7 V to 5.5 V 2.2 - - V
V
IL
LOW-level input voltage SCLK, SDATA; V
DD
= 2.7 V to 5.5 V - - 0.8 V
I
OL
LOW-level output current ALERT, T_CRIT; V
OL
=0.4V 1.0--mA
SDATA; V
OL
= 0.6 V 6.0 - - mA
I
OH
HIGH-level output current - - 1.0 A
I
IL
LOW-level input current 1.0 - - A
I
IH
HIGH-level input current - - 1.0 A
C
i
input capacitance SCLK, SDATA - 5 - pF
SMBus digital switching characteristics
[1]
f
SCLK
SCLK operating frequency - - 400 kHz
t
LOW
SCLK LOW time 10 % to 10 % 600 5000 - ns
t
HIGH
SCLK HIGH time 90 % to 90 % 600 5000 - ns
t
BUF
SMBus free time
[2]
600--ns
t
HD;STA
hold time of START condition
[3]
10 % of SDATA to 90 % of SCLK 600 - - ns
t
HD;DAT
hold time of data
[4]
0300- ns
t
SU;DAT
set-up time of data in
[5]
250--ns
t
SU;STA
set-up time of repeat START
condition
[6]
90 % to 90 % 250 - - ns
t
SU;STO
set-up time of STOP condition
[7]
90 % of SCLK to 90 % of SDATA 250 - - ns
t
r
rise time SCLK and SDATA - - 1 s
t
f
fall time SCLK and SDATA - - 300 ns
t
of
output fall time C
L
= 400 pF; I
O
= 3 mA - - 250 ns
t
to(SMBus)
SMBus time-out time
[8]
25 - 35 ms