STHDLS101A Datasheet, PDF (1/24 Pages) STMicroelectronics – Enhanced AC coupled HDMI level shifter with configurable HPD output

STHDLS101A
Enhanced AC coupled HDMI level shifter
with configurable HPD output
Features
■ Converts low-swing alternating current (AC)
coupled differential input to high-definition
multimedia interface (HDMI) rev 1.3 compliant
■ HDMI level shifting operation up to 2.7 Gbps
per lane
■ Integrated 50 Ω termination resistors for AC-
coupled differential inputs
■ Input/output transition minimized differential
signaling (TMDS) enable/disable
QFN48
(7 x 7 mm)
■ Output slew rate control on TMDS outputs to
minimize electromagnetic interference (EMI)
and eliminate external components such as RC
and choke
■ Fail safe outputs for backdrive protection
■ No re-timing or configuration required
■ Inter-pair output skew < 250 ps, intra-pair
output skew < 10 ps
■ Single power supply of 3.3 V
■ ESD protection: ±6 KV HBM on all I/O pins
■ Integrated display data channel (DDC) level
shifters. Pass-gate voltage limiters allow 3.3 V
termination on graphics and memory controller
hub (GMCH) pins and 5 V DDC termination on
HDMI connector pins
■ Level shifter and configurable output for HPD
signal from HDMI/DVI connector
■ Integrated pull-down resistor on HPD_SINK
and OE_N inputs
Applications
■ Notebooks, PC motherboards and graphic
cards
Table 1. Device summary
Description
The STHDLS101A is a high-speed high-definition
multimedia interface (HDMI) level shifter that
converts low-swing AC coupled differential input
to HDMI 1.3 compliant open-drain current
steering RX-terminated differential output.
Through the existing PCI-E pins in the graphics
and memory controller hub (GMCH) of PCs or
notebook motherboards, the pixel clock provides
the required bandwidth (1.65 Gbps, 2.25 Gbps)
for the video supporting 720p, 1080i, 1080p with a
total of 36-bit resolution. The HDMI is multiplexed
onto the PCIe pins in the motherboard where the
AC coupled HDMI at 1.2 V is output by GMCH.
The AC coupled HDMI is then level shifter by this
device to 3.3 V DC coupled HDMI output.
The STHDLS101A supports up to 2.7 Gbps,
which is enough for 12-bits of color depth per
channel, as indicated in HDMI rev 1.3.
The device operates from a single 3.3 V supply
and is available in a 48-pin QFN package.
Order code
Package
Packing
STHDLS101AQTR
QFN48
(7 x 7 x 1 mm)
Tape and reel
June 2009
Doc ID 15756 Rev 1
1/24
www.st.com
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