Diodes Incorporated PI3CH1000LE

Overview

PI3CH1000LE from Diodes Incorporated (acquired Pericom Semiconductor) is a 10-bit, dual-enable, low-voltage bus switch with 500 MHz bandwidth, 4–8 Ω on-resistance, near-zero propagation delay (<0.3 ns), and hot-plug capability. It operates across 1.8V/2.5V/3.3V supplies, supports rail-to-rail analog switching up to 5V with 3.3V VCC, and delivers 8 kV HBM ESD protection for high-reliability data path routing in backplane and docking interfaces.

For engineers reviewing the PI3CH1000LE datasheet, PI3CH1000LE pinout, PI3CH1000LE application, or PI3CH1000LE equivalent, key selection criteria include dual active-low enable control logic, 500 MHz small-signal bandwidth, sub-1 ns enable/disable timing, 5V-tolerant I/O under all supply states, and TSSOP-24 package compatibility with high-density PCB layouts.

Technical Context

The PI3CH1000LE implements ten independent bidirectional analog/digital switches controlled by two active-low enables (EN1, EN2), enabling four discrete switching modes: full disconnect, A0–A4 → B0–B4 only, A5–A9 → B5–B9 only, or full 10-bit connection. Its architecture eliminates ground bounce and adds negligible RC delay-propagation delay is dominated by external driver/load interaction, not internal logic.

It supports beyond-rail signal handling: 0–5 V analog signals with 3.3 V supply, 0–3.3 V with 2.5 V supply, and maintains 5 V I/O tolerance regardless of VCC state (ON/OFF). Switch on-resistance varies with supply voltage and input level (e.g., 4–6 Ω at 3.3 V, 0 V input; 10–25 Ω at 1.8 V, 1.6 V input), directly impacting insertion loss and channel matching in high-speed paths.

Key Specifications

Pinout & Package

PI3CH1000LE is housed in a 24-pin, 173-mil wide, lead-free and green-compliant plastic TSSOP (L) package with standard 0.65 mm pitch and exposed thermal pad (not electrically connected).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TS3USB30E and SN74CBT16210, PI3CH1000LE uniquely combines 10-bit density, dual-enable segmentation, 1.8–3.3 V operation, and certified hot-plug robustness-making it the sole option for scalable, mixed-voltage, high-bandwidth bus isolation in modern docking and modular computing platforms.

Availability

PI3CH1000LE is available at Aetrix Electronics and suitable for high-bandwidth data switching, hot-docking interfaces, and analog multiplexing requiring stable component supply across industrial, telecom, and embedded computing programs.

Supply support for PI3CH1000LE 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 and integrates its high-speed interface portfolio-including bus switches, USB switches, and signal conditioners-into broad mixed-signal solutions for data infrastructure and consumer electronics.

The PI3CH1000LE belongs to Pericom's legacy high-bandwidth analog/digital bus switch product line, engineered specifically for hot-pluggable, multi-voltage backplane and docking applications demanding minimal signal distortion and robust transient immunity.

FAQ

Can PI3CH1000LE operate with 1.8 V supply while switching 3.3 V signals?

No. The device supports "beyond-rail" switching only within defined supply–signal relationships: 0–5 V signals require ≥3.3 V VCC; 0–3.3 V signals require ≥2.5 V VCC. At 1.8 V supply, maximum allowable signal swing is 0–1.6 V per datasheet test conditions. Exceeding this risks latch-up or parametric failure.

What is the maximum capacitive load the PI3CH1000LE can drive while maintaining 500 MHz bandwidth?

The 500 MHz –3 dB bandwidth is characterized with 10 pF load capacitance (including fixture and probe). Driving >15 pF load reduces bandwidth significantly due to RC roll-off from RON (4–25 Ω) and load capacitance. For 20 pF loads, measured bandwidth drops to ~350 MHz; layout parasitics must be minimized to sustain target performance.

How does dual-enable logic improve system reliability compared to single-enable bus switches?

Dual-enable logic allows independent control of two 5-bit segments, enabling partial bus isolation during fault conditions or dynamic reconfiguration. This prevents fault propagation across all 10 bits, reduces simultaneous switching noise, and supports staggered enable sequencing to minimize inrush current-critical in hot-plug and power-managed systems.

Is PI3CH1000LE pin-compatible with any industry-standard 24-pin TSSOP bus switches?

No. Pin assignments for EN1/EN2, A/B port grouping, and VCC/GND locations are unique to the PI3CH1000LE. Substituting with other 24-pin TSSOP bus switches (e.g., SN74CBT16210 or FSA2267) requires PCB redesign due to incompatible pin mapping and enable polarity-no drop-in replacements exist.