STHDLS101T Datasheet, PDF (1/26 Pages) STMicroelectronics – AC coupled HDMI level shifter with configurable HPD output

STHDLS101T
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
t(s ^{per lane}
c ■ Integrated 50-Ω termination resistors for AC-
u _{coupled differential inputs}
rod ^{■ Input/output transition minimized differential}
signaling (TMDS) enable/disable
P _{■ Output slew rate control on TMDS outputs to}
te _{minimize electromagnetic interference (EMI)}
le _{■ Fail safe outputs for backdrive protection}
so _{■ No re-timing or configuration required}
Ob ^{■ Inter-pair output skew < 250 ps}
- _{■ Intra-pair output skew < 10 ps}
t(s) ^{■ Single power supply of 3.3 V}
■ ESD protection: ±6 KV HBM on all I/O pins
uc _{■ Integrated display data channel (DDC) level}
d _{shifters. Pass-gate voltage limiters allow 3.3 V}
ro _{termination on graphics and memory controller}
P _{hub (GMCH) pins and 5 V DDC termination on}
te ^{HDMI connector pins}
le ^{■ Level shifter and configurable output for HPD}
o signal from HDMI/DVI connector
bs ^{■ Integrated pull-down resistor on HPD_SINK}
O ^{and OE_N inputs}
QFN-48
(7 x 7 mm)
Description
The STHDLS101T 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
Applications
device to 3.3 V DC coupled HDMI output.
■ Notebooks
■ PC motherboards and graphic cards
The STHDLS101T 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
■ Dongles/cable adapters
operates from a single 3.3 V supply and is
available in a 48-pin QFN package.
Table 1. Device summary
Order code
Package
Packaging
STHDLS101TQTR
QFN-48
Tape and reel
December 2008
Rev 3
1/26
www.st.com
26