1 Features
1• IEC 61000-4-2 Level 4 ESD Protection
– ±8-kV Contact Discharge on External Lines
• Single-Chip ESD Solution for HDMI Driver
• On-Chip Current Regulator with 55-mA Current
Output
• Supports All HDMI 1.3 and HDMI 1.4b Data Rates
(–3 dB Frequency > 3 GHz)
• 0.8-pF Capacitance for the High Speed TMDS
Lines
• 0.05-pF Matching Capacitance Between the
Differential Signal Pair
• 38-Pin TSSOP Provides Seamless Layout Option
with HDMI Connector
• Backdrive Protection
– TMDS_D[2:0]+/–
– TMDS_CK+/–
– CE_REMOTE_OUT
– DDC_DAT_OUT
– DDC_CLK_OUT
– HOTPLUG_DET_OUT
• Lead-Free Package

2 Applications
• PCs
• Consumer Electronics
• Set-Top Boxes
• DVD Players

3 Description
The TPD12S521 is a single-chip electro-static
discharge (ESD) circuit protection device for the highdefinition
multimedia interface (HDMI) transmitter
port. While providing ESD protection with transient
voltage suppression (TVS) diodes, the TVS protection
adds little or no additional glitch in the high-speed
differential signals. The high-speed transition
minimized differential signaling (TMDS) ESD
protection lines add only 0.8-pF capacitance.
The low-speed control lines offer voltage-level shifting
to eliminate the need for an external voltage levelshifter
IC. The control line TVS diodes add 3.5-pF
capacitance to the control lines. The 38-pin DBT
package offers a seamless layout routing option to
eliminate the routing glitch for the differential signal
pairs. The DBT package pitch (0.5 mm) matches with
the HDMI connector pitch. In addition, the pin
mapping follows the same order as the HDMI
connector pin mapping. The TPD12S521 provides an
on-chip current limiting switch with output ratings of
55 mA at pin 38. This enables HDMI receiver
detection even when the receiver device is powered
off.