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PDF IP4786CZ32 Data sheet ( Hoja de datos )

Número de pieza IP4786CZ32
Descripción DVI and HDMI interface ESD and overcurrent protection
Fabricantes NXP Semiconductors 
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IP4786CZ32
DVI and HDMI interface ESD and overcurrent protection,
DDC/CEC buffering, hot plug detect and backdrive protection
Rev. 1 — 15 April 2011
Product data sheet
1. General description
The IP4786CZ32 is designed to protect High-Definition Multimedia Interface (HDMI)
transmitter host interfaces. It includes HDMI 5 V overcurrent / overvoltage protection, Data
Display Channel (DDC) buffering and decoupling, hot plug detect, backdrive protection,
Consumer Electronic Control (CEC) buffering and decoupling, and ±8 kV contact
ElectroStatic Discharge (ESD) protection for all I/Os in accordance with the
IEC 61000-4-2, level 4 standard.
The IP4786CZ32 incorporates Transmission Line Clamping (TLC) technology on the
high-speed Transition Minimized Differential Signaling (TMDS) lines to simplify routing
and help reduce impedance discontinuities. All TMDS lines are protected by an
impedance-matched diode configuration that minimizes impedance discontinuities caused
by typical shunt diodes.
The enhanced 60 mA overcurrent / overvoltage linear regulator guarantees
HDMI-compliant 5 V output voltage levels with up to 6.5 V inputs.
The DDC lines use a new buffering concept which decouples the internal capacitive load
from the external capacitive load for use with standard Complementary Metal Oxide
Semiconductor (CMOS) or Low Voltage Transistor-Transistor Logic (LVTTL) I/O cells
down to 1.8 V. This buffering also redrives the DDC and CEC signals, allowing the use of
longer or cheaper HDMI cables with a higher capacitance. The internal hot plug detect
module simplifies the application of the HDMI transmitter to control the hot plug signal.
All lines provide appropriate integrated pull-ups and pull-downs for HDMI compliance and
backdrive protection to guarantee that HDMI interface signals are not pulled down if the
system is powered down or enters Standby mode. Only a single external capacitor is
required for operation.
2. Features and benefitswww.DataSheet4U.net
„ HDMI 1.3a and 1.4, 340 MHz pixel clock, deep color and HDMI Ethernet and Audio
return Channel (HEAC) compatible
„ Pb-free, Restriction of Hazardous Substances (RoHS) compliant and free of halogen
and antimony (Dark Green compliant)
„ Robust ESD protection without degradation after repeated ESD strikes
„ Impedance matched 100 Ω differential transmission line ESD protection for
TMDS lines (±10 Ω). No Printed-Circuit Board (PCB) pre-compensation required
„ All external I/O lines with ESD protection of at least ±8 kV in accordance with the
IEC 61000-4-2, level 4 standard

1 page




IP4786CZ32 pdf
NXP Semiconductors
IP4786CZ32
DVI and HDMI interface ESD and overcurrent protection
Table 2.
Pin
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Pin description …continued
Name
DDC_DAT_CON
DDC_CLK_CON
UTILITY_CON
TMDS_CK_CON
TMDS_CK+_CON
TMDS_D0_CON
TMDS_D0+_CON
TMDS_D1_CON
TMDS_D1+_CON
TMDS_D2_CON
TMDS_D2+_CON
CEC_CON
ESD_BYPASS
VCC(SYS)
CEC_STBY
29
30
31
32
ground pad
CEC_SYS
n.c.
n.c.
HOTPLUG_DET_SYS
GND
Description
DDC data connector side
DDC clock connector side
utility line ESD protection
TMDS ESD protection to connector
TMDS ESD protection to connector
TMDS ESD protection to connector
TMDS ESD protection to connector
TMDS ESD protection to connector
TMDS ESD protection to connector
TMDS ESD protection to connector
TMDS ESD protection to connector
CEC signal connector side
ESD bias voltage
supply voltage for level shifting
CEC Standby mode control (LOW for lowest
power, CEC-only mode)
CEC I/O signal system side
not connected
not connected
hot plug detect system side
ground
www.DataSheet4U.net
IP4786CZ32
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 15 April 2011
© NXP B.V. 2011. All rights reserved.
5 of 35

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IP4786CZ32 arduino
NXP Semiconductors
IP4786CZ32
DVI and HDMI interface ESD and overcurrent protection
Table 8. Static characteristics …continued
Tamb = 25 °C to +85 °C unless otherwise specified.
Symbol Parameter
Conditions
HOTPLUG_DET_SYS[1]
VOH HIGH-level output voltage IOL = 1 mA
VOL LOW-level output voltage IOL = 1 mA
Rpd pull-down resistance
Min Typ
0.7 × VCC(SYS)
-
60
-
200
100
[1] The device is active if the input voltage at pin CEC_STBY is above the HIGH level.
[2] This parameter is guaranteed by design.
[3] Capacitive load measured at power on.
[4] No external pull-up resistor attached.
Max
-
300
140
Unit
V
mV
kΩ
Table 9. CEC_STBY power management circuit
VCC(SYS) = 1.62 V to 5.5 V; VCC(5V0) = 4.5 V to 6.5 V; GND = 0 V; Tamb = 25 °C to +85 °C unless otherwise specified.
Symbol Parameter
Conditions
Min Typ Max Unit
Board side: input pin CEC_STBY[1]
VIH
HIGH-level input voltage
HIGH = active
[2] 1.2
-
6.5 V
VIL
LOW-level input voltage
LOW = standby
[3] 0.5
-
0.8 V
Rpd pull-down resistance
60 100 140 kΩ
Ci input capacitance
VI = 3 V or 0 V
- 6 7 pF
[1] The CEC_STBY pin should be connected permanently to VCC(5V0) or VCC(SYS) if no enable control is needed.
[2] DDC buffers, Hot Plug Detect (HPD) buffer, and HDMI_5V0_CON out enabled; CEC buffer enabled.
[3] DDC buffers, HPD buffer, and HDMI_5V0_CON out disabled; CEC buffer enabled.
www.DataSheet4U.net
IP4786CZ32
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 15 April 2011
© NXP B.V. 2011. All rights reserved.
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