Datasheet

LM75B All information provided in this document is subject to legal disclaimers. © NXP B.V. 2015. All rights reserved.
Product data sheet Rev. 6.1 — 6 February 2015 22 of 37
NXP Semiconductors
LM75B
Digital temperature sensor and thermal watchdog
12. Dynamic characteristics
[1] These specifications are guaranteed by design and not tested in production.
[2] This is the SDA time LOW for reset of serial interface.
[3] Holding the SDA line LOW for a time greater than t
to
will cause the LM75B to reset SDA to the idle state of the serial bus communication
(SDA set HIGH).
Table 19. I
2
C-bus interface dynamic characteristics
[1]
V
CC
= 2.8 V to 5.5 V; T
amb
=  55  C to +125  C; unless otherwise specified.
Symbol Parameter Conditions Min Typ Max Unit
f
SCL
SCL clock frequency see Figure 20 0.02 - 400 kHz
t
HIGH
HIGH period of the SCL clock 0.6 - - s
t
LOW
LOW period of the SCL clock 1.3 - - s
t
HD;STA
hold time (repeated) START condition 100 - - ns
t
SU;DAT
data set-up time 100 - - ns
t
HD;DAT
data hold time 0 - - ns
t
SU;STO
set-up time for STOP condition 100 - - ns
t
f
fall time SDA and OS outputs;
C
L
= 400 pF; I
OL
=3mA
-250-ns
t
to
time-out time
[2][3]
75 - 200 ms
Fig 20. Timing diagram
SDA
SCL
002aab271
t
f
S
Sr
P S
t
HD;STA
t
LOW
t
r
t
SU;DAT
t
f
t
HD;DAT
t
HIGH
t
SU;STA
t
HD;STA
t
SP
t
SU;STO
t
r
t
BUF
0.7 × V
DD
0.3 × V
DD
0.7 × V
DD
0.3 × V
DD