5-W Switch Connection Between Two Ports

TTL-Compatible Input Levels

Power Off Disables Outputs, Permitting

Live Insertion

Outputs Are Precharged by Bias Voltage to

Minimize Signal Distortion During Live

Insertion

Active-Clamp Undershoot-Protection

Circuit on the I/Os Clamps Undershoots

Down to –2 V

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 SN74CBTK6800 device provides ten bits of high-speed TTL-compatible bus switching. The low on-state

resistance of the switch allows bidirectional connections to be made while adding near-zero propagation delay.

The device also precharges the B port to a user-selectable bias voltage (BIASV) to minimize live-insertion noise.

The A and B ports have an active-clamp undershoot-protection circuit. When there is an undershoot, the

active-clamp circuit is enabled and current from VCC is supplied to clamp the output, preventing the pass

transistor from turning on.

The SN74CBTK6800 is organized as one 10-bit switch with a single enable (ON) input. When ON is low, the

switch is on, and port A is connected to port B. When ON is high, the switch between port A and port B is open.

When ON is high or VCC is 0 V, B port is precharged to BIASV through the equivalent of a 10-kW resistor.