GTLP8T306

GTLP8T306 8-Bit LVTTL/GTLP Bus Transceiver

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GTLP8T306 8-Bit LVTTL/GTLP Bus Transceiver

September 1997 Revised December 2000

GTLP8T306 8-Bit LVTTL/GTLP Bus Transceiver
General Description
The GTLP8T306 is an 8-bit bus transceiver that provides LVTTL to GTLP signal level translation. The device provides a high speed interface between cards operating at LVTTL logic levels and a backplane operating at GTLP logic levels. High speed backplane operation is a direct result of GTLP s reduced output swing ( 1V), reduced input threshold levels and output edge rate control. The edge rate control minimizes bus settling time. GTLP is a Fairchild Semiconductor derivative of the Gunning Transceiver logic (GTL) JEDEC standard JESD8-3. Fairchild s GTLP has internal output edge-rate control and is process, voltage, and temperature (PVT) compensated. Its function is similar to BTL and GTL but with different output levels and receiver thresholds. The GTLP output LOW level is typically less than 0.5V, the output HIGH level is 1.5V and the receiver threshold is 1.0V.

Features
s Bidirectional interface between GTLP and LVTTL logic levels s Designed with edge rate control circuitry to reduce output noise on the GTLP port s VREF pin provides external supply reference voltage for receiver threshold adjustibility s Special PVT Compensation circuitry to provide consistent performance over variations of process, supply voltage and temperature s TTL compatible driver and control inputs s Designed using Fairchild advanced CMOS technology s Bushold data inputs on A port to eliminate the need for external pull-up resistors for unused inputs s Power up/down and power off high impedance for live insertion s 5V over voltage tolerance on LVTTL ports s Open drain on GTLP to support wired-or connection s Flow through pinout optimizes PCB layout s A Port source/sink -24mA/ 24mA s B Port sink 50mA

Ordering Code:
Order Number GTLP8T306MTC Package Number MTC24 Package Description 24-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide

Devices also available in Tape and Reel. Specify by appending the suffix letter "X" to the ordering code.

Connection Diagram

2000 Fairchild Semiconductor Corporation

DS500051

www.fairchildsemi.com