Member of the Texas Instruments
Widebus Family
TI-OPC Circuitry Limits Ringing on
Unevenly Loaded Backplanes
OEC Circuitry Improves Signal Integrity
and Reduces Electromagnetic Interference
Bidirectional Interface Between GTLP
Signal Levels and LVTTL Logic Levels
Split LVTTL Port Provides a Feedback Path
for Control and Diagnostics Monitoring
AO Outputs Have Equivalent 26-Ω Series
Resistors, So No External Resistors Are
Required
LVTTL Interfaces Are 5-V Tolerant
High-Drive GTLP Open-Drain Outputs
(100 mA)
Reduced LVTTL Outputs (–12 mA/12 mA)
Variable Edge-Rate Control (ERC) Input
Selects GTLP Rise and Fall Times for
Optimal Data-Transfer Rate and Signal
Integrity in Distributed Loads
Ioff, Power-Up 3-State, and BIAS VCC
Support Live Insertion
Distributed VCC and GND Pins Minimize
High-Speed Switching Noise
Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)

description
The SN74GTLP22033 is a high-drive, 8-bit, three-wire registered transceiver that provides inverted
LVTTL-to-GTLP and GTLP-to-LVTTL signal-level translation. The device allows for transparent, latched, and
flip-flop modes of data transfer with separate LVTTL input and LVTTL output pins, which provides a feedback
path for control and diagnostics monitoring, the same functionality as the SN74FB2033. 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 LVTTL or TTL) 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 high drive allows incident-wave switching in
heavily loaded backplanes with equivalent load impedance down to 11 Ω.
The AO outputs, which are designed to sink up to 12 mA, include equivalent 26-Ω resistors to reduce overshoot
and undershoot.