Diodes Incorporated PI3C3384Q

Overview

PI3C3384Q from Pericom Semiconductor is a 2.5V/3.3V, 10-bit, 2-port bus switch IC with near-zero propagation delay (0.25 ns), 5 Ω typical on-resistance, and 400+ MHz bandwidth, designed for high-speed data path switching in hot-insertion-capable backplanes and modular computing systems.

For engineers reviewing the PI3C3384Q datasheet, PI3C3384Q pinout, PI3C3384Q application, or PI3C3384Q equivalent, key selection criteria include rail-to-rail 2.5V/3.3V operation, 5V I/O tolerance, dual independent bus enable control (BEA/BEB), and QSOP-24 packaging for space-constrained board layouts.

Technical Context

The PI3C3384Q implements two independent 5-bit switch banks (A0–A4/B0–B4 and A5–A9/B5–B9), each controlled by separate active-low BEA and BEB signals, enabling selective routing without signal inversion or added timing skew. Its CMOS transmission-gate architecture delivers rail-to-rail analog/digital switching with no internal logic or buffering.

With 3.5 pF input capacitance and 10 pF on-state A/B capacitance, the device minimizes RC loading on high-speed buses; its 5 Ω R_ON ensures minimal voltage drop (<100 mV at 48 mA) and preserves signal integrity across 50 Ω–500 Ω loads.

Key Specifications

Pinout & Package

PI3C3384Q is housed in a Pb-free, green 24-pin QSOP package (150-mil width, JEDEC MO-137B/AE compliant), with 0.635 mm lead pitch and 3.99 mm body width.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT3384CPWR and PI3CHD3245Q, PI3C3384Q uniquely supports both 2.5 V and 3.3 V operation with 5 V I/O tolerance and dual independent enables - making it the only choice for scalable, mixed-voltage hot-insertion architectures requiring full 10-bit bidirectional routing.

Availability

PI3C3384Q is available at Aetrix Electronics and suitable for modular server backplanes, industrial PLC I/O expansion, and automated test equipment requiring stable component supply across extended temperature and mixed-voltage environments.

Supply support for PI3C3384Q 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

Pericom Semiconductor was a fabless provider specializing in high-speed interface, timing, and signal-integrity solutions before its acquisition by Diodes Incorporated in 2016; its portfolio emphasizes low-jitter, low-R_ON, and hot-swap-optimized ICs.

PI3C3384Q belongs to Pericom's bus switch product line, engineered specifically for zero-delay, rail-to-rail signal routing in hot-pluggable computing and industrial control systems where bus contention and voltage domain bridging are critical concerns.

FAQ

Does PI3C3384Q support 2.5 V and 3.3 V simultaneously on the same device?

No - PI3C3384Q operates from a single V_CC supply, selectable as either 2.5 V or 3.3 V (±10%). Both logic thresholds and R_ON are optimized per supply voltage. The 5 V I/O tolerance allows connection to 5 V drivers/receivers regardless of V_CC setting.

What is the maximum capacitive load the PI3C3384Q can drive while maintaining signal integrity?

The device is characterized up to 50 pF load capacitance with 500 Ω termination, delivering 0.25 ns propagation delay. For loads exceeding 50 pF, rise/fall times increase linearly with √(C_L × R_ON); design margin requires limiting total trace + load capacitance to ≤75 pF for <1 ns edge degradation.

Can BEA and BEB be tied together for single-enable operation?

Yes - BEA and BEB may be paralleled to operate all 10 bits as one bank. This reduces control complexity but forfeits independent upper/lower 5-bit routing. Ensure combined fan-out does not exceed 20 µA at V_IL/V_IH thresholds under worst-case V_CC and temperature.

Is PI3C3384Q pin-compatible with earlier Pericom bus switches like PI3C3245?

No - PI3C3384Q uses a 24-pin QSOP with unique pin mapping (e.g., BEA/BEB on pins 1/24, A/B banks interleaved). PI3C3245 is an 8-bit, single-port device in 20-pin TSSOP; no mechanical or logical pin compatibility exists between the families.