PCA8551 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2015. All rights reserved.
Product data sheet Rev. 2 — 24 March 2015 39 of 57
NXP Semiconductors
PCA8551
Automotive 36 × 4 LCD segment driver
Fig 28. I
2
C-bus timing waveforms
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Table 21. SPI-bus characteristics
V
DD
= 1.8 V to 5.5 V; V
SS
= 0 V; T
amb
=
40
C to +105
C; unless otherwise specified; all timing values are valid within the
operating supply voltage and T
amb
range and are referenced to V
IL
and V
IH
with an input voltage swing of V
SS
to V
DD
.
Symbol Parameter Conditions Min Typ Max Unit
Pin SCL
f
SCL
SCL clock frequency - - 5 MHz
t
LOW
LOW period of the SCL
clock
150 - - ns
t
HIGH
HIGH period of the SCL
clock
80 - - ns
t
r
rise time - - 100 ns
t
f
fall time - - 100 ns
Pin CE
t
su(CE_N)
CE_N set-up time 30 - - ns
t
h(CE_N)
CE_N hold time 10 - - ns
t
rec(CE_N)
CE_N recovery time 70 - - ns
Pin SDIO
t
su
set-up time write data 5 - - ns
t
h
hold time write data 50 - - ns
t
d(R)SDIO
SDIO read delay time C
L
= 50 pF - - 150 ns
t
dis(SDIO)
SDIO disable time no load - - 50 ns
t
t(SDI-SDO)
transition time from SDI to
SDO
write to read mode 0 - - ns
