Datasheet

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INTRODUCTION
Texas Instruments provides an array of advanced bus-interface devices. Designers can
select the best solutions for speed, level translation, power consumption, noise rejection, fault
tolerance, or simply driving a high-speed local bus or backplane.
Gunning Transceiver Logic (GTL) devices are reduced-voltage-swing, high-speed interface
devices between cards operating at LVTTL logic levels and backplanes operating at GTL
signal levels. High-speed backplane operation is a direct result of the reduced output swing
(<1 V), reduced input threshold levels, and output edge control. TI offers LVTTL-to-GTL
translators in SSOP and TSSOP Widebus packages to interface with TTL/LVTTL-based
subsystems in wireless, remote access, mass storage and legacy telecom/networking
applications.
Gunning Transceiver Logic Plus (GTLP) devices are reduced-voltage-swing devices that are
designed for high-speed interface between cards operating at LVTTL logic levels and
backplanes operating at GTLP signal levels. High-speed backplane operation in excess of
80 MHz is a direct result of the reduced output swing (<1 V), reduced input threshold levels,
output edge control, and overshoot-protection circuitry. All devices are optimized for the
higher threshold voltage and lower noise margin GTLP derivative of the JEDEC JESD8-3 GTL
standard. TI offers LVTTL-to-GTLP translators in low-profile, fine-pitch ball grid array
(LFBGA), Widebus, and octal packages to interface with TTL/LVTTL-based subsystems in
wireless, remote access, mass storage and legacy telecom/networking applications.
BTL/FB+ transceivers from TI provide high drive and speed, while minimizing skew and
ground-bounce noise. BTL devices are compatible with IEEE Std 1194.1-1991. The BTL/FB+
standard uses a greatly reduced output swing and a tighter switching region, improved noise
margins, live insertion, bus hold on inputs, series damping resistors on high-drive outputs, and
space-saving package options.
ABTE has wider noise margins and is backward compatible with existing TTL logic. ABTE
devices support the VME64-ETL specification, with tight tolerances on skew and transition
times. ABTE is manufactured using the latest 0.8-m BiCMOS process by providing high drive
up to 90 mA. Other features include a bias pin and internal pullup resistors on control pins for
maximum live-insertion protection. Bus-hold circuitry eliminates external pullup resistors on
the inputs and series damping resistors on the outputs to damp reflections.
VME complies with VME64 Standard and has 2.94-V regulated output voltage with 1%
tolerance at 25°C. VME provides bias for up to 32 lines of active termination for VME buses,
–575-mA sourcing current for termination, +475-mA sinking current for active negation
drivers, current limit and thermal shutdown protection, and low thermal resistance
surface-mount packages.
For more information on these and other TI products, please contact your local TI
representative, authorized distributor, the TI technical support hotline at 972-644-5780, or
visit the TI home page at http://www.ti.com
MicroStar BGA, MicroSTAR Jr., OEC, TI-OPC, Widebus, and Widebus+ are trademarks of Texas Instruments.