Philips TDA8443A - Manual (Page 11)

1995 Mar 07 11
Philips Semiconductors Product specification
I 2 C-bus controlled YUV/RGB switch TDA8443A
TIMING CHARACTERISTICS
I
2 C-bus load conditions: 4 k
Ω
pull-up resistor to +5 V; 200 pF capacitor to GND;
all values are referenced to V
IH
= 3 V and V
IL
= 1.5 V; see Fig.4.
Note
1. Timing t
HD;DAT
deviates from the I 2 C-bus specification. After reset has been activated, a delay of 50
µ
s must occur
before transmission may be resumed.
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX.
t
BUF
time bus must be free before start 4.7
− µ
s
t
SU;STA
set-up time for start condition 4.7
− µ
s
t
HD;STA
hold time for start condition 4.0
− µ
s
t
LOW
SCL and SDA LOW time 4.7
− µ
s
t
HIGH
SCL HIGH time 4.0
− µ
s
t
r
SCL and SDA rise time
−
1.0
µ
s
t
f
SCL and SDA fall time
−
0.3
µ
s
t
SU;DAT
data set-up time (write) 250
−
ns
t
HD;DAT
data hold time (write) note 1 1.0
− µ
s
t
SU;ACK
acknowledge set-up time
−
2
µ
s
t
HD;ACK
acknowledge hold time 0
− µ
s
t
SU;STO
set-up time for stop condition 4.7
− µ
s
Fig.4 I 2 C-bus timing diagram.
handbook, full pagewidth
MLD005
SDA
(WRITE)
SCL
t BUF
t SU; STA
t HD; STA
t LOW
t f t r
t HD; DAT
t SU; ACK t HD; ACK
t LOW
t SU; STO
t HIGH
t SU; DAT