IP4786CZ32 NXP Semiconductors, IP4786CZ32 Datasheet - Page 20

• Manufacturer Part Number: IP4786CZ32
• Description: DIODE, ESD, HDMI INTERFACE, SOT617
• Manufacturer: NXP Semiconductors

Specifications of IP4786CZ32

• Diode Type: HDMI ESD Interface
• Power Dissipation Pd: 50mW
• Clamping Voltage Vc Max: 8V
• Operating Voltage: 5V
• Diode Case Style: HVQFN
• No. Of Pins: 32
• External Depth: 5.1mm
• External Length /: RoHS Compliant

NXP Semiconductors
IP4786CZ32
Product data sheet
Fig 21. DDC circuit
Fig 22. DDC level shifting waveform example
DDC_CLK_CON
(1) Valid I
(2) Valid logic-level signaling example to the ASIC (system side) from 1.8 V (HIGH) to approximately 0.5 V (LOW).
a. DDC clock
ESD_BYPASS
2
C signaling example on the cable (connector side) from 5 V (HIGH) to approximately 1 V (LOW).
11.2 DDC circuit
V
5
4
3
2
1
0
HDMI_5V0_CON
The DDC bus circuit integrates all required pull-ups, and provides full capacitive
decoupling between the HDMI connector and the DDC bus lines on the PCB. The
capacitive decoupling ensures that the maximum capacitive load is well within the 50 pF
maximum of the HDMI specification. No external pull-ups or pull-downs are required.
The bidirectional buffers support high-capacitive load on the HDMI cable-side. Various
non-compliant but prevalent low-cost cables have been observed with a capacitive load of
up to 6 nF on the DDC lines, far exceeding the 700 pF HDMI limit. The IP4786CZ32 can
easily decouple this from the weaker ASIC I/O buffers, and drive the rogue cable
successfully.
(1)
(2)
1.85 kΩ
V
All information provided in this document is subject to legal disclaimers.
CC(SYS)
DDC_DAT_SYS
3.65 kΩ
018aaa103
Rev. 1 — 15 April 2011
DVI and HDMI interface ESD and overcurrent protection
time
DDC_DAT_CON
b. DDC data
ESD_BYPASS
HDMI_5V0_CON
1.85 kΩ
018aaa105
IP4786CZ32
© NXP B.V. 2011. All rights reserved.
V
CC(SYS)
DDC_DAT_SYS
3.65 kΩ
018aaa104
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