The CBTS3257 is a quad 1-of-2 high-speed TTL-compatible multiplexer/demultiplexer from Philips Semiconductors. The device features 5 Ω switch connection between two ports, TTL-compatible input levels, Schottky diodes on I/O clamp undershoot, minimal propagation delay through the switch, and latch-up protection exceeding 500 mA per JESD78, ESD protection exceeding 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101.