GTL2008PW

12-bit GTL to LVTTL translator with power good control and high-impedance LVTTL and GTL outputs


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The GTL2008 is a customized translator between dual Xeon processors, Platform Health Management, South Bridge and Power Supply LVTTL and GTL signals.

Functionally and footprint identical to the GTL2007, the GTL2008 LVTTL and GTL outputs were changed to put them into a high-impedance state when EN1 and EN2 are LOW, with the exception of 11BO because its normal state is LOW, so it is forced LOW. EN1 and EN2 will remain LOW until VCC is at normal voltage, the other inputs are in valid states and VREF is at its proper voltage to assure that the outputs will remain high-impedance through power-up.

The GTL2008 has the enable function that disables the error output to the monitoring agent for platforms that monitor the individual error conditions from each processor. This enable function can be used so that false error conditions are not passed to the monitoring agent when the system is unexpectedly powered down. This unexpected power-down could be from a power supply overload, a CPU thermal trip, or some other event of which the monitoring agent is unaware.

A typical implementation would be to connect each enable line to the system power good signal or the individual enables to the VRD power good for each processor.

Typically Xeon processors specify a VTT of 1.1 V to 1.2 V, as well as a nominal Vref of 0.73 V to 0.76 V. To allow for future voltage level changes that may extend Vref to 0.63 of VTT(minimum of 0.693 V with VTT of 1.1 V) the GTL2008 allows a minimum Vref of 0.66 V. Characterization results show that there is little DC or AC performance variation between these Vref levels.

Features and benefits

  • Operates as a GTL to LVTTL sampling receiver or LVTTL to GTL driver
  • Operates at GTL-/GTL/GTL+ signal levels
  • EN1 and EN2 disable error output
  • All LVTTL and GTL outputs are put in a high-impedance state when EN1 and EN2 are LOW
  • 3.0 V to 3.6 V operation
  • LVTTL I/O not 5 V tolerant
  • Series termination on the LVTTL outputs of 30 O
  • ESD protection exceeds 2000 V HBM per JESD22-A114, 150 V MM per JESD22-A115, and 1000 V CDM per JESD22-C101
  • Latch-up testing is done to JEDEC Standard JESD78 Class II, Level A which exceeds 500 mA
  • Package offered: TSSOP28
All information on this product information page is subject to the subsequent disclaimers:
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Show functional diagram

Block diagram: GTL2008PW
Block diagram: GTL2008PW

Parametrics of this product

Type numberPackageNumber of bitsApplicationTTL Drive(mA)GTL Drive(mA)Voltage Translation Range(V)FunctionOperating Temperature(Cel)
GTL2008PWSOT361-1
(TSSOP28)		12Dual Xeon Processor Interface to 3.3V Chipset with power good enable16150.5 to 3.6 ~ 3.0 to 5.512-bit GTL-/GTL/GTL+ to LVTTL translator-40~85

Similar products

Package

Type numberOrderable part numberOrdering code (12NC)Product statusPackagePackingMarking
GTL2008PWGTL2008PW,1129352 821 67112Volume productionSOT361-1
(TSSOP28) 		TubeGTL2008
GTL2008PWGTL2008PW,1189352 821 67118Volume productionSOT361-1
(TSSOP28) 		Reel Pack, SMD, 13"GTL2008

Outline drawing

Package VersionPackage NamePackage DescriptionReference CodesIssue Date
SOT361-1TSSOP28plastic thin shrink small outline package; 28 leads; body width 4.4 mmMO-153 (JEDEC); 2003-02-19

Related documents

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Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHSLeadfree conversion dateRHFIFR (FIT)MTBF (hours)MSLMSL LF
GTL2008PWGTL2008PW,112GTL2008PWAlways Pb-free2.05.0E811
GTL2008PWGTL2008PW,118GTL2008PWAlways Pb-free2.05.0E811
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Documentation for this product

File nameTitleTypeFormatDate
GTL200812-bit GTL to LVTTL translator with power good control and high-impedance LVTTL and GTL outputsData sheetpdf2010-02-19
AN10216I2C manualApplication notepdf2003-03-27
design_con_2003_tecforum_i2c_bus_overviewDesignCon 2003 TecForum I 2 C Bus OverviewOther typepdf2003-01-27

Ordering & availability

Type numberOrdering code (12NC)Orderable part numberRegionDistributorIn stockOrder quantityInventory dateBuy onlineSamples
GTL2008PW9352 821 67112GTL2008PW,112NAAVNET EXPRESS AMERICAS1,0555/20/2013Buy onlinenot available
GTL2008PW9352 821 67118GTL2008PW,118      not available

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