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GTL2008
Datasheet
General description
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 Vreflevels.
Features
- 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 Ohm
- ESD protection exceeds 2000 V HBM per JESD22-A114, 200 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
Products/packages
| Type number | North American Type number | Ordering code (12NC) | Product status | Package | Packing | Marking | Chemical content | Leadfree conversion date |
|---|---|---|---|---|---|---|---|---|
| GTL2008PW | GTL2008PW | 9352 821 67112 | Volume production | SOT361-1
(TSSOP28) | Tube | Standard Marking | GTL2008PW
| Always Pb-free |
| GTL2008PW | GTL2008PW-T | 9352 821 67118 | Volume production | SOT361-1
(TSSOP28) | Reel Pack, SMD, 13" | Standard Marking | GTL2008PW
| Always Pb-free |
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Indicative price/unit($) | Region | Distributor | In stock | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|
| GTL2008PW | 9352 821 67112 | 0.8500 | NA | DIGI-KEY CORPORATION | 1,225 | 8/5/2008 | Buy online | not available |
| GTL2008PW | 9352 821 67118 | 0.8500 | Order samples |
Technical documents
Application Notes
AN10216_1;
I2C manual (27-Mar-03)
Support Documents
75012794;
GTL16612/GTL1655 -- 18- and 16-bit bi-directional GTL-to-LVTTL/TTL translators (15-Jun-04)
75011212;
I2C 2002-1A Evaluation Board Kit (2003-03-01)
39340011_jp;
I2C-bus specification (latest version) (2004-06-22)
Parametrics/similar products
| Type number | Package | Supply voltage(V) | Application | FUNCTION | Operating temp.(Cel) | # of Bits | TTL Drive(mA) | GTL Drive(mA) | Voltage Translation Range(V) |
|---|---|---|---|---|---|---|---|---|---|
| GTL2008PW | SOT361-1
(TSSOP28) | 3.0~3.6 | Dual Xeon Processor Interface to 3.3V Chipset with power good enable | 12-bit GTL-/GTL/GTL+ to LVTTL translator | -40~85 | 12 | 16 | 15 | 0.5 to 3.6 ~ 3.0 to 5.5 |
Similar products
GTL2008 links to the similar products page containing an overview of products that are similar in function or related to the type number(s) as listed on this page. The similar products page includes products from the same catalog tree(s), relevant selection guides and products from the same functional category.
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