Diodes Incorporated PI5C3384LEX

Overview

PI5C3384LEX from Pericom Semiconductor is a 10-bit, 2-port CMOS bus switch with dual active-low bus enable inputs (BEA, BEB), 5 Ω typical on-resistance, near-zero propagation delay (0.25 ns), and ultra-low quiescent current (0.1 μA typ). It directly connects Bus A (A0–A9) and Bus B (B0–B9) in ON state with high-impedance isolation when disabled, used in notebook PC memory expansion and low-power peripheral interconnects.

For engineers reviewing the PI5C3384LEX datasheet, PI5C3384LEX pinout, PI5C3384LEX application, or PI5C3384LEX equivalent, key selection criteria include dual independent 5-bit enable control, sub-1 ns disable timing (tPLZ/tPHZ ≤ 5.5 ns), 50 pF load-compatible switching, and Pb-free TSSOP-24 packaging for space-constrained embedded systems.

Technical Context

The PI5C3384LEX implements two independent 5-bit bidirectional switch banks (A0–A4/B0–B4 and A5–A9/B5–B9), each controlled by separate active-low enables (BEA, BEB). Its CMOS transmission-gate architecture delivers symmetrical conduction with no DC path between ports in Hi-Z state.

Switching is governed solely by control pin logic levels-no internal clock or bias circuitry is required. Propagation delay arises only from RC time constant of 5 Ω R_ON and external load capacitance, not internal logic, enabling transparent signal pass-through for TTL/CMOS voltage levels (V_IL = 0.8 V, V_IH = 2.0 V).

Key Specifications

Pinout & Package

PI5C3384LEX is housed in a Pb-free, green 24-pin TSSOP (173-mil width, 0.65 mm pitch), with 1.2 mm max height and 4.4 mm × 7.8 mm footprint.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 10-bit bus switch applications.

Compared with SN74CBT3384CPWR and 74FST3384MTCX, PI5C3384LEX offers the lowest on-resistance, fastest disable timing, smallest profile, and guaranteed Pb-free availability-making it optimal for next-generation portable and space-constrained embedded systems.

Availability

PI5C3384LEX is available at Aetrix Electronics and suitable for notebook PC design, memory expansion modules, hot-swap I/O interfaces, and mixed-voltage logic bridging requiring stable component supply and RoHS-compliant packaging.

Supply support for PI5C3384LEX 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 (now part of Diodes Incorporated) specialized in high-speed interface and signal-integrity solutions for computing, communications, and consumer electronics before its 2016 acquisition.

The PI5C3384LEX belongs to Pericom's low-voltage CMOS bus switch product line, engineered specifically for zero-delay, low-power interconnect in portable and battery-sensitive applications.

FAQ

What is the maximum operating voltage for PI5C3384LEX?

The absolute maximum supply voltage is +7.0 V, but the device is specified for reliable operation only within 4.75 V to 5.25 V (±5% of 5 V). Operation outside this range may cause excessive leakage or latch-up, and is not guaranteed per datasheet electrical characteristics.

Can PI5C3384LEX be used with 3.3 V logic signals?

Yes-its input thresholds (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V) and 0–5 V input voltage range fully support 3.3 V CMOS/TTL signaling. The switch passes signals bi-directionally without level translation, making it ideal for interfacing 3.3 V controllers to 5 V peripherals.

Does PI5C3384LEX require external pull-up or pull-down resistors on BEA/BEB pins?

No-BEA and BEB have no internal pull resistors, but their logic thresholds are standard TTL-compatible. External pull-ups are only needed if the driving source cannot guarantee a defined HIGH state during power-up or reset; typical microcontroller GPIOs drive them directly.

Is thermal derating required for continuous operation at 85°C ambient?

No-PI5C3384LEX is rated for continuous operation from –40°C to +85°C ambient with VCC = 5 V ±5%. Its 0.5 W maximum power dissipation and low R_ON ensure junction temperature remains within safe limits even under worst-case 120 mA per pin conditions, provided standard PCB copper area is used.