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Datasheet File OCR Text: |
june 2009 doc id 15756 rev 1 1/24 24 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 termination resistors for ac- coupled differential inputs input/output transition minimized differential signaling (tmds) enable/disable 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 volt age 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 description the STHDLS101A is a high-speed high-definition multimedia interf ace (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. qfn48 (7x7mm) table 1. device summary order code package packing STHDLS101Aqtr qfn48 (7 x 7 x 1 mm) tape and reel www.st.com
contents STHDLS101A 2/24 doc id 15756 rev 1 contents 1 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 system interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3.1 pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4 functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 5 maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 5.1 recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 5.1.1 power supply and temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . 14 5.1.2 differential inputs (in_d signals) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 5.2 tmds outputs (out_d signals) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 5.3 hpd input and output characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 5.4 ddc input and output chatacteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 5.5 oe_ input characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 5.6 hpd input resistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 5.7 esd performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 6 application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 6.1 power supply sequencing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 6.2 supply bypassing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 6.3 differential traces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 7 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 8 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 STHDLS101A block diagram doc id 15756 rev 1 3/24 1 block diagram figure 1. STHDLS101A block diagram 50 10% in_d4+ in _d4- out_d4+ out_d4- 50 10% in_d 3 + in _d 3 - out_d 3 + out_d 3 - 50 10% in_d2+ in _d2- out_d2+ out_d2- 50 10% in_d1+ in _d1- out_d1+ out_d1- 10ma c u rrent driver 10ma c u rrent driver 10ma current driver 10ma c u rrent driver hpd_ s ource hpd_ s ink ddc_en s cl_ s ource s da_ s ource s cl_ s ink s da_ s ink oe_n rext 0 v 0v 0v 0v vcc 33 rx rx rx rx 160 k hpd level s hifter hpd system interface STHDLS101A 4/24 doc id 15756 rev 1 2 system interface figure 2. system inferface figure 3. cable adapter ' r a p h i c s c h i p s e t ' - # ( o n t h e m o t h e r b o a r d 0 # ) % x p r e s s 3 $ 6 / ( $ - ) ( $ - ) o u t p u t c o n n e c t o r ! - 6 3 4 ( $ , 3 ! , e v e l s h i f t e r $ o n g l e o r c a b l e a d a p t e r $ 0 ! - 6 ( $ - ) $ 6 ) 3 4 ( $ , 3 ! STHDLS101A system interface doc id 15756 rev 1 5/24 figure 4. dp to hdmi/dvi cable adapter ! - 6 hdmi/dvi transmitter pc chipset hpd hpd_sink STHDLS101A hdmi/dvi cable adaptor ac_tmds dc tmds ddc ddc hdmi/dvi connector dp connector hpd_source ac_tmds ddc pin configuration STHDLS101A 6/24 doc id 15756 rev 1 3 pin configuration figure 5. STHDLS101A pin configuration ' . $ ) . ? $ ) . ? $ ) . ? $ / 5 4 ? $ ' . $ / 5 4 ? $ / 5 4 ? $ 3 $ ! ? 3 ) . + ( 0 $ ? 3 ) . + ) . ? $ 6 # # 6 # # ' . $ 1 & |