DS1776QML

The DS1776 is an octal PI-bus Transceiver. The A to B path is latched. B outputs are open collector with series Schottky diode, ensuring minimum B output loading. B outputs also have ramped rise and fall times (2.5 ns typical), ensuring minimum PI-bus ringing. B inputs have glitch rejection circuitry, 4 ns typical.

Designed using Texas Instruments’s Bi-CMOS process for both low operating and disabled power. AC performance is optimized for the PI-Bus inter-operability requirements.

The DS1776 is an octal latched transceiver and is intended to provide the electrical interface to a high performance wired-or bus. This bus has a loaded characteristic impedance range of 20Ω to 50Ω and is terminated on each end with a 30Ω to 40Ω resistor.

The DS1776 is an octal bidirectional transceiver with open collector B and TRI-STATE A port output drivers. A latch function is provided for the A port signals. The B port output driver is designed to sink 100 mA from 2V and features a controlled linear ramp to minimize crosstalk and ringing on the bus.

A separate high level control voltage (V_X) is provided to prevent the A side output high level from exceeding future high density processor supply voltage levels. For 5V systems, V_X is tied to V_CC.