IP4777CZ38 NXP Semiconductors, IP4777CZ38 Datasheet - Page 15

• Manufacturer Part Number: IP4777CZ38
• Description: DIODE,ESD,DVI HDMI INTERFACE,SOT510-1
• Manufacturer: NXP Semiconductors

Specifications of IP4777CZ38

• Diode Type: ESD Protection
• Power Dissipation Pd: 14mW
• Clamping Voltage Vc Max: 8V
• Operating Voltage: 5V
• No. Of Pins: 38
• Svhc: No SVHC (18-Jun-2010)
• Ptc Fuse Case: TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

NXP Semiconductors
IP4777CZ38_2
Product data sheet
Fig 11. CEC output waveform
(1) Dotted line indicates effect without slew rate limiter.
10.5 Backdrive protection
The HDMI contains various signals which can partly supply current into an HDMI device
that is powered down.
Typically, the DDC lines and the CEC signals can force 5 V into the switched off device.
The IP4777CZ38 ensures that at power-down, the critical signals are blocked to prevent
any damage to the HDMI sink and HDMI source.
Fig 10. CEC module
Fig 12. Backdrive protection
0.8 V
(1)
HDMI source
Rev. 02 — 12 February 2009
HDMI ASIC
CEC_OUT
supply off
TMDS_BIAS
backdrive current
LIMITER
SLEW
RATE
V
CC(3V3)
DVI and HDMI interface ESD protection
(1)
001aag044
5 V
I
2
C-bus ASIC
CEC_IN
HDMI sink
001aag047
IP4777CZ38
© NXP B.V. 2009. All rights reserved.
001aag045
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