Diodes Incorporated PI5C3253LE

Overview

PI5C3253LE from Pericom Semiconductor is a dual 4:1 multiplexer/demultiplexer bus switch with three-state outputs, pin-compatible with 74F253 and 74ALS/AS/LS253 logic families. It features 5Ω on-resistance, near-zero propagation delay (0.25 ns), ultra-low quiescent current (0.2 μA typical), and operates over –40°C to +85°C ambient temperature. It is used in notebook PC memory/data bus routing where low power and signal integrity are critical.

For engineers reviewing the PI5C3253LE datasheet, PI5C3253LE pinout, PI5C3253LE application, or PI5C3253LE equivalent, key selection factors include its 5Ω R_ON, 0.25 ns t_IY, 16-pin TSSOP (L) package, ESD protection up to 2 kV HBM, and compatibility with 5 V TTL logic levels.

Technical Context

The PI5C3253LE implements two independent 4:1 analog bus switches controlled by shared S1/S0 select lines and separate EA/EB enables. Each switch connects one of four bidirectional inputs (IA0–IA3 or IB0–IB3) to its output (YA or YB) when enabled, presenting near-direct metal-like conduction with no active logic delay.

It uses CMOS transmission-gate architecture with rail-to-rail analog switching capability, supports 5 V supply only, and maintains high-impedance outputs when disabled-enabling clean bus sharing without contention or ground bounce noise.

Key Specifications

Pinout & Package

PI5C3253LE is packaged in a 16-pin 173-mil wide Pb-free & Green TSSOP (Package Code L), compliant with JEDEC MO-153F/AB. Pin pitch is 0.65 mm; body width is 4.4–4.5 mm; total length is 5.0–5.1 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual 4:1 bus switch applications.

Compared with SN74CBT3253PWR and 74FST3253MTCX, the PI5C3253LE delivers lowest R_ON and lowest quiescent current in a pin-compatible 5 V-only solution, making it optimal for power- and timing-critical notebook bus routing where layout reuse is mandatory.

Availability

PI5C3253LE is available at Aetrix Electronics and suitable for notebook PC motherboard design, embedded controller bus arbitration, and legacy peripheral interface consolidation requiring stable component supply and long-term lifecycle support.

Supply support for PI5C3253LE 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 of high-speed interface, timing, and signal integrity solutions, acquired by Diodes Incorporated in 2016; its legacy portfolio remains widely deployed in computing and communications infrastructure.

The PI5C3253 belongs to Pericom's high-performance bus switch product line, designed specifically for low-latency, low-power signal routing in portable and embedded computing platforms with strict thermal and space constraints.

FAQ

Is PI5C3253LE compatible with 3.3 V logic systems?

No. The PI5C3253LE is specified only for 5 V ±5% operation. Its input thresholds (VIH = 2.0 V min., VIL = 0.8 V max.) and internal circuitry require a 5 V supply to guarantee correct switching behavior and R_ON performance. Interfacing with 3.3 V systems requires level translation.

What is the maximum capacitive load the PI5C3253LE can drive reliably?

The device is characterized up to 50 pF load capacitance (CL = 50 pF) for propagation delay and switching timing specs. Driving >50 pF increases RC delay and may degrade edge rates; for loads exceeding this, verify signal integrity via simulation or bench testing with actual board trace capacitance.

Can EA and EB be tied together for synchronous enable control?

Yes. EA and EB are independent active-low enables, but tying them together is electrically valid and commonly used to treat both channels as a single 8:2 switch. Ensure the combined enable signal meets VIH/VIL thresholds and fan-out requirements of the driving source.

Does PI5C3253LE support hot-swap or live-insertion?

No. The device lacks built-in hot-swap protection features such as slew-rate control or undervoltage lockout. Applying V_CC while signals are present may cause latch-up or excessive current. Power sequencing-V_CC before I/O signals-is required per Absolute Maximum Ratings.