CBT6832

INTEGRATED CIRCUITS CBT6820 20-bit bus switch with precharged outputs and Schottky undershoot protection for live insertion Product specification 1999 Apr 05 Philips Semiconductors Philips Semiconductors Product specification 20-bit bus switch with precharged outputs and Schottky undershoot protection for live insertion CBT6820 FEATURES TTL compatible inputs and outputs 5Ω switch connection between two port A and port B Thin shrink small outline (TSSOP) Undershoot protection included to prevent shoot through level changes PIN CONFIGURATION BIASV 1 1A1 2 1A2 3 1A3 4 1A4 5 1A5 6 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 1OE 2OE 1B1 1B2 1B3 1B4 1B5 GND 1B6 1B7 1B8 1B9 1B10 2B1 2B2 2B3 GND 2B4 2B5 2B6 2B7 2B8 2B9 2B10 Bias voltage pre-charges the outputs to minimize signal distortion during live insertion 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. The device 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-kΩ resistor. Special c...