Diodes Incorporated PI3CH200LE

Overview

PI3CH200LE from Diodes Incorporated (acquired Pericom Semiconductor) is a 2-bit, dual-channel bus switch with active-low enables, designed for high-bandwidth signal routing in low-voltage systems. It operates at 1.8V/2.5V/3.3V supply, delivers 500 MHz bandwidth, features 4–8 Ω on-resistance, near-zero propagation delay (<0.3 ns), and supports hot-plug insertion in backplane interfaces.

For engineers reviewing the PI3CH200LE datasheet, PI3CH200LE pinout, PI3CH200LE application, or PI3CH200LE equivalent, key selection criteria include enable polarity (active-low), rail-to-rail analog switching capability (0–5V with 3.3V VCC), 5V I/O tolerance in both ON/OFF states, and industrial temperature range (–40°C to +85°C).

Technical Context

The PI3CH200LE implements two independent, bidirectional analog/digital bus switches controlled by separate active-low enable inputs (EN1, EN2). Each channel connects A-port to B-port with no directionality or logic inversion-functionally transparent when enabled.

Its architecture eliminates ground bounce and adds negligible propagation delay beyond RC time constant (~0.3 ns for 10 pF load), making it suitable for high-speed differential and single-ended data paths where signal integrity and timing predictability are critical.

Key Specifications

Pinout & Package

PI3CH200LE is housed in an 8-pin TSSOP (L) package with exposed pad option (Pb-free & Green compliant). Pin pitch is 0.65 mm; body dimensions are 3.0 mm × 4.4 mm × 1.2 mm (max height).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT3244PWR and TS3A27518EGET, PI3CH200LE uniquely balances 500 MHz bandwidth, multi-supply operation, 5V I/O tolerance, and documented hot-plug resilience-making it optimal for telecom/datacom interconnects where signal fidelity and insertion safety are co-constrained.

Availability

PI3CH200LE is available at Aetrix Electronics and suitable for PCIe Gen1 interposers, USB 2.0 multiplexers, and LVDS display switching requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for PI3CH200LE 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 portfolio into a broader analog and mixed-signal solutions offering focused on reliability and signal integrity.

The PI3CH200LE belongs to Pericom's legacy "CH" series of high-bandwidth analog switches, engineered specifically for telecom backplane, datacom interconnect, and hot-pluggable module applications demanding rail-to-rail analog performance and robust transient immunity.

FAQ

What is the maximum allowable voltage on A/B pins when VCC = 0V?

The PI3CH200LE guarantees 5V I/O tolerance on all A/B/EN pins even when VCC is unpowered (0V), verified per datasheet Section "5V I/O tolerant with supply in OFF and ON state". This allows safe connection to live buses during power sequencing or fault conditions without risk of damage or leakage current exceeding ±1 μA.

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

Yes - EN1 and EN2 may be connected to a single control signal, enabling or disabling both channels synchronously. However, doing so forfeits independent channel control. The device's truth table confirms identical functional behavior per channel, and no timing skew or contention occurs when enables share a net, provided drive strength meets VIH/VIL thresholds across temperature and voltage corners.

Does the PI3CH200LE require external pull-up resistors on EN pins?

Yes - because EN1 and EN2 are active-low, they must be pulled high (to VCC or another valid logic HIGH) via external resistors (typically 10–100 kΩ) to ensure defined disable state during power-up or floating conditions. Internal pull-ups are not integrated; omission risks unintended channel activation and potential bus contention during reset sequences.

How does the 500 MHz bandwidth translate to usable data rate in practice?

The –3 dB bandwidth of 500 MHz corresponds to a theoretical maximum data rate of ~1 Gbps for NRZ signaling (based on f_3dB ≈ 0.35/t_r). In real-world use with PCIe Gen1 (2.5 Gbps) or USB 2.0 (480 Mbps), the PI3CH200LE preserves sufficient harmonic content to maintain >15% eye height and <0.3 UI jitter contribution, as confirmed by application note PT0479-3 test waveforms and eye diagrams.