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SN74GTLPH32916 датащи(PDF) 1 Page - Texas Instruments |
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SN74GTLPH32916 датащи(HTML) 1 Page - Texas Instruments |
1 / 18 page www.ti.com FEATURES DESCRIPTION/ORDERING INFORMATION SN74GTLPH32916 34-BIT LVTTL-TO-GTLP UNIVERSAL BUS TRANSCEIVER WITH BUFFERED CLOCK OUTPUTS SCES380A – JANUARY 2002 – REVISED JUNE 2005 • LVTTL Outputs (–24 mA/24 mA) • Member of the Texas Instruments Widebus+™ • GTLP Rise and Fall Times Designed for Family Optimal Data-Transfer Rate and Signal Integrity in Distributed Loads • UBT™ Transceiver Combines D-Type Latches and D-Type Flip-Flops for Operation in • Ioff, Power-Up 3-State, and BIAS VCC Support Transparent, Latched, Clocked, and Live Insertion Clock-Enabled Modes • Bus Hold on A-Port Data Inputs • TI-OPC™ Circuitry Limits Ringing on • Distributed VCC and GND Pins Minimize Unevenly Loaded Backplanes High-Speed Switching Noise • OEC™ Circuitry Improves Signal Integrity and • Latch-Up Performance Exceeds 100 mA Per Reduces Electromagnetic Interference JESD 78, Class II • Bidirectional Interface Between GTLP Signal • ESD Protection Exceeds JESD 22 Levels and LVTTL Logic Levels – 2000-V Human-Body Model (A114-A) • GTLP Buffered CLKAB Signal (CLKOUT) – 200-V Machine Model (A115-A) • LVTTL Interfaces Are 5-V Tolerant – 1000-V Charged-Device Model (C101) • Medium-Drive GTLP Outputs (50 mA) The SN74GTLPH32916 is a medium-drive, 34-bit UBT transceiver that provides LVTTL-to-GTLP and GTLP-to-LVTTL signal-level translation. It allows for transparent, latched, clocked, and clock-enabled modes of data transfer. Additionally, it provides for a copy of CLKAB at GTLP signal levels (CLKOUT) and conversion of a GTLP clock to LVTTL logic levels (CLKIN). The device provides a high-speed interface between cards operating at LVTTL logic levels and a backplane operating at GTLP signal levels. High-speed (about three times faster than standard TTL or LVTTL) backplane operation is a direct result of GTLP's reduced output swing (<1 V), reduced input threshold levels, improved differential input, OEC circuitry, and TI-OPC circuitry. Improved GTLP OEC and TI-OPC circuits minimize bus-settling time and have been designed and tested using several backplane models. The medium drive allows incident-wave switching in heavily loaded backplanes with equivalent load impedance down to 19 Ω. GTLP is the Texas Instruments derivative of the Gunning Transceiver Logic (GTL) JEDEC standard JESD 8-3. The ac specification of the SN74GTLPH32916 is given only at the preferred higher noise-margin GTLP, but the user has the flexibility of using this device at either GTL (VTT = 1.2 V and VREF = 0.8 V) or GTLP (VTT = 1.5 V and VREF = 1 V) signal levels. Normally, the B port operates at GTLP signal levels. The A-port and control inputs operate at LVTTL logic levels, but are 5-V tolerant and are compatible with TTL and 5-V CMOS inputs. VREF is the B-port differential input reference voltage. This device is fully specified for live-insertion applications using Ioff, power-up 3-state, and BIAS VCC. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down. The power-up 3-state circuitry places the outputs in the high-impedance state during power up and power down, which prevents driver conflict. The BIAS VCC circuitry precharges and preconditions the B-port input/output connections, preventing disturbance of active data on the backplane during card insertion or removal, and permits true live-insertion capability. ORDERING INFORMATION TA PACKAGE(1) ORDERABLE PART NUMBER TOP-SIDE MARKING –40°C to 85°C LFBGA – GKF Tape and reel SN74GTLPH32916KR GM916 (1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. Widebus+, UBT, TI-OPC, OEC are trademarks of Texas Instruments. PRODUCTION DATA information is current as of publication date. Copyright © 2002–2005, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
Аналогичный номер детали - SN74GTLPH32916 |
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Аналогичное описание - SN74GTLPH32916 |
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