pca9527 NXP Semiconductors, pca9527 Datasheet - Page 6

• Manufacturer Part Number: pca9527
• Description: 3-channel Bidirectional Bus Extender For Hdmi, I C-bus And Smbus
• Manufacturer: NXP Semiconductors

NXP Semiconductors
PCA9527_1
Product data sheet
6.3.2 Port A (CECA)
Table 3.
CECA does not have a rise time accelerator, but has a standard open-drain I/O. In
addition to incurring no offset voltage, it has edge rate control and a lower capacitance
than those of standard discrete MOSFET, and isolates the input/output capacitance. It is
designed for a lower speed channel for consumer electronic control (less than 10 kHz) or
general purpose interrupt or reset over long cable.
CECA does not have internal pull-up. The pull-up resistor is calculated using standard
I
Pin
SDAA
SCLA
2
Fig 4.
C-bus pull-up resistor formula, as shown in
R
(k )
PU
10.5
8.5
6.5
4.5
2.5
0.5
rise time = 1 s; V
SDAA/SCLA line pull-up resistor versus load capacitance
HDMI DDC pull-up resistors specification
0
complies with
1 s rise time
3-channel bidirectional bus extender for HDMI, I
Where
at the source (DVD/STB)
at the sink (LCD TV)
at the source (DVD/STB)
at the sink (LCD TV)
Rev. 01 — 29 June 2009
CC(A)
1.0
= 5 V
does not comply with
1 s rise time
2.0
Section 6.3.3 “Port B (SDAB, SCLB,
Minimum
1.5 k
-
1.5 k
3.0
47 k
C
L
(nF)
2
PCA9527
C-bus and SMBus
002aad620
© NXP B.V. 2009. All rights reserved.
Maximum
2.0 k
-
2.0 k
10 %
4.0
CECB)”.
6 of 22