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GTLP Solutions GTLP (Gunning Transceiver Logic Plus) Product Line Card Overview The GTLP Advantage: • Reduced Output Swing • Tight Receiver Threshold • Signal Edge-rate Control • Low Voltage • Low Power • High Speed • Throughput Rates of 200Mbs - 30Gbs • Best Solutions for Multipdrop Backplane Designs Typical Application: • Data Communications • Telecommunications • Servers • High-performance Computer Products GTLP Features Features Benefits Ideal for incident-wave switching applications Stable transition improves data integrity and increases bus throughput LVTTL or TTL A Ports, GTLP B Ports Interfaces TTL to GTLP VOL control Consistent, low skew Reduced output voltage swings Low switching noise, low EMI CMOS and BiCMOS Lowers system power Power up/power down high impedance Isolates active bus to permit live insertion Open drain design Allows designer to match driver impedance to backplane characteristics 100 mV receiver threshold Minimizes skew for increased performance Product Listing Device Leads Packaging GTLP16612 18-Bit TTL/GTLP Universal Bus Transceiver Description 56 SSOP & TSSOP GTLP16616 17-Bit TTL/GTLP Bus Transceiver with Buffered Clock 56 SSOP & TSSOP GTLP16617 17-Bit TTL/GTLP Synchronous Bus Transceiver with Buffered Clock 56 SSOP & TSSOP GTLP16T1655 16-Bit LVTTL/GTLP Universal Bus Transceiver 64 TSSOP GTLP18T612 18-Bit LVTTL/GTLP Universal Bus Transceiver 56 SSOP & TSSOP GTLP6C816 TTL/GTLP 1:6 Clock Driver 24 TSSOP GTLP6C816A LVTTL/GTLP Clock Driver 24 TSSOP GTLP6C817 Low Drive TTL/GTLP 1:6 Clock Driver 24 TSSOP GTLP8T306 8-Bit LVTTL/GTLP Bus Transceiver 24 TSSOP GTLP17T616 17-Bit LVTTL/GTLP Bus Transceiver with Buffered Clock 56 TSSOP GTLP Features GTLP Family Characteristics Fairchild’s GTLP family incorporates patented edge-rate control circuitry for cleaner signals than competitive products offer. (Figure 1) shows a simplified schematic of the typical GTLP output circuit. GTLP uses an output sense circuit to sense changes in a GTLP output. The circuit then triggers a current source/sink circuit to control the rise and fall time of the output. GTLP devices also feature open drain on the GTLP output. This gives the backplane designer the flexibility to change the impedance of the backplane drivers to more closely match the impedance of the backplane environment. The TTL/LVTTL side of GTLP devices offers the same reliable performance as the LCX product family. Competitive Advantage Vint Output Sense Soft Turn On Vtt = 1.5V Gate Drive Data Enable Output Pull-Down NMOS Soft Turn On Gate Drive Figure 1. Typical GTLP Output Circuit GTLP 5.0V 1.5V VTT 1.5V VTT • Up to 4 times the performance of FCT, ABT and other TTL devices in backplane applications • Data rates up to 100 MHz • Reduced swing voltage levels and tight threshold differential receivers • Optimization of backplane for the highest possible performance (Figure 2) VCC VCC 2.0V 50Ω 50Ω GTLP Transceiver 1.05V 0.95V Threshold GTLP Transceiver 0V Time TTL 5.0V 5V VCC 5V VCC 220Ω 220Ω 330Ω TTL Transceiver TTL Transceiver 330Ω 2.0V 0.8V Threshold 0V Time Figure 2. Typical GTLP Backplane (top) vs. Typical TTL Backplane (bottom) 140 Throughput ECL Backplane speed (MHz) 120 • Higher throughput compared to other semiconductor technologies (Figure 3) • Cost-effective in designs with throughputs from 200Mbs—30Gbs • Greater than 50mA AC drive • Open-drain design 100 Reduced output swing (1V or less) 80 GTLP 60 40 ABT, LVT, FCT 20 TTL or 5V output swing FAST, FACT, LCX 5 10 15 Load: number of backplane cards Figure 3. GTLP offers a wide performance range 20 Lower Noise and Power • Controlled slew rates and soft turn on/off (Figure 4) • Supply independence • Advanced CMOS and BiCMOS designs reduce static power consumption • Lower noise than TTL (Figure 5) • 3V and 5V products Overshoot Detect Soft Turn-on 90% 90% 10% 10% Soft Turn-on Undershoot Detect tr tf Figure 4. -10 -20 Amplitude (dB) -30 -40 Typical TTL -50 -60 GTLP -70 Noise Floor -80 1 100 200 300 400 500 600 700 800 900 1000 Frequency (MHz) Figure 5. Controlled edge rates reduce noise and EMI Signal Integrity Signal with reflections Voltage • Controlled edge rates for cleaner signals • Devices are designed to achieve incident wave switching (Figure 6) • 1V (±50mV) differential receiver threshold • Process, temperature and voltage-compensated differential receivers • Open-drain design allows optimization of GTLP outputs for your design’s backplane characteristics Signal with clean incident wave Threshold Tpd Tsettle Time Actual Tpd = Tpd + Tsettle Tsettle = multiples of the round trip bus delay Figure 6. Clean incident wave enhances peformance Optimization • GTLP allows adjustment of three key variables: • Rterm – termination resistance • VTT – termination voltage • Vref – reference voltage Combination of these three variables allows optimization of GTLP devices to the characteristics of your backplane design (Figure 7). 1.5V VTT 1.5V VTT Rterm Rterm GTLP Transceiver GTLP Transceiver GTLP Transceiver GTLP Clock driver Vref 1.0V Data signals Figure 7. GTLP allows optimization to your backplane environment For complete Product Information and Design Support, contact the Fairchild Sales Office in your area. Product Line GTLP16612 GTLP16616 GTLP16617 GTLP16T1655 GTLP18T612 GTLP6C816 GTLP6C816A GTLP6C817 GTLP8T306 GTLP17T616 Advanced technical support includes: • Fairchild’s dedicated Backplane Laboratory • Extended parts-specification data • Knowledgeable and experienced technical support staff • SPICE & IBIS simulation models Ordering Codes GTLP 8T306 MTC X AMERICAS Customer Response Center Fairchild Semiconductor 222 West Las Colinas Blvd., Ste. 380 Irving, TX 75039 Tel: 888-522-5372 Fax: 972-910-8036 ITALY Fairchild Semiconductor Srl Via Carducci, 125 20099 Sesto San Giovanni (MI) Italy Tel: 39-02-249111-1 Fax: 39-02-26263424 FINLAND Fairchild Semiconductor Itakatu 3D213 FIN-00930 Helsinki Finland Tel: 358 9 341 1266 Fax: 358 9 341 1292 JAPAN Fairchild Semiconductor Japan Ltd. 4F, Natsume Building 2-18-6, Yushima Bunkyo-ku, Tokyo 113-0034 Japan Tel: 81-3-3818-8840 Fax: 81-3-3818-8841 FRANCE Fairchild Semiconductor Centre d'Affaires "Le Parc de Massy" Z.I. De la Bonde 1 bis, Rue Marcel Paul Bat.B F-91742 Massy Cedex France Tel: 33-1-6930-3696 Fax: 33-1-6930-3693 GERMANY Fairchild Semiconductor GmbH Oska-von-Miller-Strasse 4e D-82256 Fuerstenfeldbruck Germany Tel: 49-8141-61020 Fax: 49-8141-6102-100 HONG KONG Fairchild Semiconductor Room 808, 8/F Hong Kong Ltd. 68 Mody Road, Empire Centre Tsimshatsui East, Kowloon Hong Kong Tel: 852-2722-8338 Fax: 852-2722-8383 IRELAND Fairchild Semiconductor Ltd Block 1 Clonskeagh Square Clonskeagh Road Dublin 14, Ireland Tel: 353-1-2600022 Fax: 353-1-2830650 Fairchild Semiconductor Shin-Osaka-Meiko Building 8F 4-3-12 Miyahara Yodogawa-ku Osaka-shi 532-0003 Japan Tel: 81-6-398-3670 Fax: 81-6-398-3680 KOREA Fairchild Korea Semiconductor, Ltd 82-3, Todang-Dong, Wonmi-Ku, Puchon, Kyonggi-Do, Korea, 420-711 Tel: 82-32-680-1931,33,46 Fax: 82-32-680-1949 Fairchild Korea Semiconductor, Ltd. Song-i Building 6F, 976-12 ,Youngtong-dong, Paldal-ku, Suwon, Kyunggi-do,Korea, 442-010 Tel: 82-331-205-0291~8 Fax: 82-331-205-3352 Fairchild Korea Semiconductor, Ltd. Shillim Building 5F, 447-2, Songjung Dong, Kumi, Kyongsangbuk-Do, Korea, 730-090 Tel: 82-546-457-4111 Fax: 82-546-457-4121 Technology Device type 8 T 306 MEXICO Fairchild Semiconductor Av. Vallarta #6503 Flr. 14 Col. Cd Granjas Zapopan Jalisco 45010 Mexico Tel: 52-3-1100017 Fax: 52-3-1101878 NORWAY Fairchild Semiconductor Andrenbakken 21B P.O. Box 132 N-1392 Vettre Norway Tel: 47-66787620 Fax: 47-66787619 SINGAPORE Fairchild Semiconductor Asia Pacific Pte. Ltd. 350 Orchard Raod #20-01/03 Shaw House Singapore 238868 Tel: 65-836-0936 Fax: 65-838-0321/3 Malaysia Office: Bayan Lapas Free Trade Zone 11900 Penang, Malaysia Tel: 60-4-646-3212 Fax: 60-4-646-3211 SWEDEN Fairchild Semiconductor Alstromergatan 22 S-112 47 Stockholm Sweden Tel: 46-8-6515530 Fax: 46-8-6515505 TAIWAN Fairchild Semiconductor Hong Kong Ltd Taiwan Branch 16/F, No. 167 Tun Hwa North Road Taipei, Taiwan Tel: 886-2-2712-0500 Fax: 886-2-2716-9285 UNITED KINGDOM Fairchild Semiconductor Ltd 10 Interface Business Park Wootton Bassett Swindon SN 8SY United Kingdom Tel: 44-1793-856856 Fax: 44-1793-856857 Bit Width: Data bit width of device (ex. 6, 8, 16, 18) Function: T=Transceiver B=Bidirectional (drive and receiver) C=Clock Driver R=Receiver D=Driver Part number will be different for each part Visit our web site at www.fairchildsemi.com Package Code MEA=56-Lead Shrink Small Outline Package (SSOP) MTD=56/64-Lead Thin Shrink Small Outline Package (TSSOP) MTC=24-Lead Thin Shrink Small Outline Package (TSSOP) Note: The GTLP16612, GTLP16616, GTLP16617 do not use this numbering scheme. Special Variations “X”=Tape and Reel “ ”=Rail/Tube The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks: ACEx™, CoolFET™, CROSSVOLT™, E 2 CMOS TM, FACT™, FACT Quiet Series™, FAST®, FASTr™, GTO™, HiSeC™, ISOPLANAR™, MICROWIRE™, POP™, PowerTrench™, QS™, Quiet Series™, SuperSOT™-3, SuperSOT™-6, SuperSOT™-8, TinyLogic™, UHC™, VCX™ © 2000 Fairchild Semiconductor Corporation All Rights Reserved Lit No. 585430-003
