Diodes Incorporated PI3CH200LEX

Overview

PI3CH200LEX from Diodes Incorporated (acquired Pericom Semiconductor) is a dual-channel, low-voltage bus switch with active-low enables, designed for high-bandwidth signal routing in 1.8V/2.5V/3.3V systems. It delivers 500 MHz bandwidth, <0.3 ns propagation delay, 4–25 Ω on-resistance depending on supply, and supports rail-to-rail analog switching (0–5V with 3.3V VCC). It enables hot-plug-capable data path control in backplane and docking interfaces.

For engineers reviewing the PI3CH200LEX datasheet, PI3CH200LEX pinout, PI3CH200LEX application, or PI3CH200LEX equivalent, this device is selected for low-noise, zero-ground-bounce signal switching where sub-nanosecond timing integrity, I/O voltage tolerance up to 6V, and industrial temperature operation (–40°C to +85°C) are required.

Technical Context

The PI3CH200LEX implements two independent bilateral CMOS transmission gates, each controlled by an active-low enable (EN1, EN2), allowing per-channel signal path activation without propagation delay addition beyond RC time constant (~0.3 ns for 10 pF load). Its architecture avoids ground bounce by eliminating internal latch-up paths and uses clamp diodes for ±6V input tolerance regardless of VCC state.

It operates across three supply rails (1.8V, 2.5V, 3.3V) with corresponding VIH/VIL thresholds, on-resistance scaling (4–25 Ω), and enable timing that varies with VCC (e.g., tPZH max = 9.0 ns at 3.3V, 25.0 ns at 1.8V). ESD robustness (8 kV HBM) and JESD17 latch-up immunity (>200 mA) support rugged interconnect environments.

Key Specifications

Pinout & Package

Package: 8-pin TSSOP (L), Pb-free and RoHS-compliant, 3.0 mm × 4.4 mm body, 0.65 mm pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bus switch applications.

Compared with SN74CBT3244DBR and TS3A27518EGET, the PI3CH200LEX uniquely balances wide supply flexibility (1.8V–3.3V), 500 MHz bandwidth, 6V I/O tolerance, and hot-plug readiness - making it optimal for industrial backplane and docking applications demanding both speed and ruggedness.

Availability

PI3CH200LEX is available at Aetrix Electronics and suitable for high-bandwidth data switching, hot-docking interfaces, analog signal multiplexing, and differential signal routing requiring stable component supply across industrial, telecom, and embedded computing programs.

Supply support for PI3CH200LEX includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated acquired Pericom Semiconductor in 2017, integrating its high-speed interface and signal-integrity portfolio into a broad analog and mixed-signal solutions platform.

The PI3CH200LEX belongs to Pericom's legacy high-bandwidth bus switch product line, engineered specifically for low-latency, hot-plug-capable signal routing in telecom backplanes, modular servers, and test instrumentation.

FAQ

What is the maximum allowable input voltage when VCC = 0 V?

The PI3CH200LEX supports 5V I/O tolerance in both ON and OFF states, with absolute maximum input voltage rated at –0.5 V to +6.0 V regardless of VCC condition. This enables safe hot insertion into live backplanes where transient voltages may exceed supply rails before power stabilization.

Can EN1 and EN2 be tied together for synchronous control of both channels?

Yes - EN1 and EN2 are electrically independent but functionally identical; tying them together simplifies control logic and ensures simultaneous switching of both A↔B paths. No timing skew or contention occurs, as each enable drives its own gate driver without shared internal nodes.

Does the device introduce measurable jitter in high-frequency clock paths?

No - the PI3CH200LEX contributes negligible jitter because it adds no active logic delay; only passive RC filtering from RON and load capacitance. Measured phase noise degradation is below instrument noise floor (<0.1 ps RMS) at 100 MHz, confirmed in Pericom application note PT0479-3.

Is there a recommended layout practice to preserve 500 MHz bandwidth?

Yes - maintain matched 50 Ω microstrip traces to both A and B pins, minimize stub length (<2 mm), place 100 nF ceramic decoupling capacitor within 3 mm of VCC pin, and isolate GND pour under the TSSOP body to reduce parasitic coupling. These practices are validated in the PI3CH200 evaluation board layout (EVB-PI3CH200).