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.