IP4786CZ32 NXP Semiconductors, IP4786CZ32 Datasheet - Page 22

• 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
11.4 Hot plug detect circuit and HEAC support
11.5 CEC
The IP4786CZ32 includes a hot plug detect circuit that simplifies the hot plug application.
The circuit generates a standard logic level from the hot plug signal.
The hot plug detect circuit is pulling down the signal to avoid any floating signal.
The comparator guarantees a save detection of the 2 V hot plug signal without any
glitches or oscillation at the hot plug output.
The IP4786CZ32 also provides an additional ESD pin to protect the reserved / HEAC pin
along with hot plug detect to 8 kV IEC 61000-4-2, level 4.
The logical multidrop topology of the CEC bus can include complex physical stubs,
loading cables, and interconnects that may deteriorate signal quality.
The IP4786CZ32 includes a full bidirectional buffer to drive the CEC bus and isolate
the CEC microcontroller or ASIC General-Purpose Input/Output (GPIO).
The CEC buffer derives power from an on-board 3.3 V regulator from the V
(see
guarantees an HDMI compliant V
backdrive-protected 125 μA nominal CEC pull-up which does not degrade the bus when
powered down.
By placing the CEC microcontroller and V
the CEC microcontroller can communicate over CEC for power commands, and then
enable the HDMI port via the CEC_STBY pin, as well as the rest of the system as needed.
If IP4786CZ32 Standby modes are not required, or if the Power-down modes are not
desired, the CEC_STBY pin can be pulled HIGH to V
HDMI and CEC operation.
Strapping the CEC_STBY = V
ending with the suffix “_SYS” on the system side will be disabled when V
protecting the ASIC I/O signals from exceeding its local V
is powered, HDMI_5V0_CON go active and hot plug events can be detected only when
the ASIC power supply rail is on.
Strapping CEC_STBY = V
enabled whenever the local V
levels.
Fig 24. Hot plug detect circuit
Figure
25). This allows extensive system power management configurations and
All information provided in this document is subject to legal disclaimers.
HOTPLUG_DET_CON
Rev. 1 — 15 April 2011
CC(5V0)
DVI and HDMI interface ESD and overcurrent protection
CC(5V0)
CC(SYS)
ESD_BYPASS
(CEC_CON)
is the most basic configuration where the buffers are
and V
= V
100 kΩ
DD
CC(5V0)
CC(SYS)
V
on the connector, as well as the
of ASIC guarantees that all interface signals
CC(5V0)
input on a 5 V rail as shown in
supplies reach minimum operating
CC(5V0)
100 kΩ
HOTPLUG_DET_SYS
DD
. In this mode, even if V
or V
018aaa107
IP4786CZ32
CC(SYS)
© NXP B.V. 2011. All rights reserved.
CC(SYS)
for continuous
CC(5V0)
Figure
goes low,
domain
CC(5V0)
22 of 35
28,