CBT6820

Features:

• TTL compatible inputs and outputs
• 5 switch connection between two port A and port B
• Thin shrink small outline (TSSOP)
• Undershoot protection included to prevent shoot through level changes
• Bias voltage pre-charges the outputs to minimize signal distortion during live insertion


Pinout




Specifications

SYMBOL	PARAMETER	CONDITIONS	RATING	UNIT
VCC	DC supply voltage		0.5 to +7.0	V
IIK	DC clamp diode current	VI < 0	50	mA
VI	DC input voltage1		0.5 to +7.0	V
ISW	DC continuous channel current	VO = 0 to VCC	± 128	mA
VBIASV	Storage temperature range		0.5 to +7.0
Tstg	DC bias voltage		65 to 150	V
øJA	Plastic thin shrink small outline package (TSSOP)		104	/W

Description

The CBT6820 provides twenty bits of high-speed TTL-compatible bus switching. The low on-state resistance of the switch allows bi-directional 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.

CBT6820 is organized as two 10-bit switch with individual enable (OE) input. When OE is low, the switch is on and port A is connected to port B. When OE is high, the switch between port A and port B is open and the B port is precharged to BIASV through the equivalent of a 10-kW resistor.

Special clamp circuitry and Schottky diode CBT6820 clamps to ground are used to prevent an under voltage on the A side (Vin < GND) from causing the B side precharge voltage to drop below the "1" state.