Diodes Incorporated PI5C3257WE

Overview

PI5C3257WE from Diodes Incorporated is a quad 2:1 analog multiplexer/demultiplexer bus switch with three-state outputs, designed for high-speed data routing in digital systems. 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. It serves as a low-noise, low-delay signal path in notebook I/O expansion and memory address selection.

For engineers reviewing the PI5C3257WE datasheet, PI5C3257WE pinout, PI5C3257WE application, or PI5C3257WE equivalent, key selection criteria include its 5Ω switch R_ON, sub-nanosecond t_IY, 3-state output control via E/S pins, and compatibility with legacy 74-series logic families in QSOP/TSSOP/UQFN packages.

Technical Context

The PI5C3257WE implements four independent bidirectional 2:1 analog switches controlled by a shared select (S) and enable (E) input. Each switch connects one of two inputs (IA/IB, etc.) to its corresponding output (YA–YD) with no level-shifting or logic inversion - preserving signal integrity for TTL/CMOS voltage levels.

Its architecture eliminates ground bounce and propagation delay accumulation by using low-R_ON MOSFET-based transmission gates instead of conventional logic-gated buffers. The device draws only 0.2 µA ICC in quiescent state and supports rail-to-rail analog signals up to 7.0 V across all pins.

Key Specifications

Pinout & Package

Available in 16-pin QSOP (Q), TSSOP (L), and UQFN (ZHD) packages. All variants share identical pin mapping and electrical behavior.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad 2:1 analog switch applications.

Compared with SN74CBT3257PW and 74LVC1G3157GW, the PI5C3257WE delivers superior low-power performance (0.2 µA vs. 5 µA/1 µA), tighter R_ON tolerance (5 Ω vs. 7 Ω/8 Ω), and integrated quad functionality - making it optimal for portable, high-density, and timing-sensitive bus routing.

Availability

PI5C3257WE is available at Aetrix Electronics and suitable for notebook I/O expansion, memory address multiplexing, industrial control bus switching, and legacy logic interface bridging requiring stable component supply and long-term manufacturability.

Supply support for PI5C3257WE 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 is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

The PI5C3257WE belongs to Diodes' high-speed bus switch product line, engineered specifically for low-latency, low-power signal routing in portable computing, industrial automation, and mixed-voltage interface applications.

FAQ

Is PI5C3257WE compatible with 3.3 V logic systems?

Yes. The PI5C3257WE supports V_CC from 3.0 V to 5.5 V and accepts input voltages from –0.5 V to +7.0 V, enabling direct interfacing with 3.3 V CMOS/TTL logic without level shifters. Its control inputs (E, S) recognize 2.0 V as VIH minimum at V_CC = 3.3 V, ensuring reliable switching.

What is the maximum continuous current per switch channel?

The absolute maximum DC output current is 120 mA per channel, verified under thermal limits at TA = +85°C. At 50 mA load, R_ON remains ≤5 Ω, resulting in <250 mV voltage drop - sufficient for driving terminated 50 Ω transmission lines or standard logic fan-out.

Does PI5C3257WE require external pull-up or pull-down resistors on control pins?

No. Internal weak pull-downs on E and S pins ensure defined logic states during power-up or floating conditions. With I_IL ≤ ±1 µA at V_IN = GND, even high-impedance MCU GPIOs can reliably drive these inputs without external biasing components.

Can PI5C3257WE be used in hot-swap applications?

Yes. Its –0.5 V to +7.0 V input/output rating and 0.25 ns propagation delay allow safe insertion into live backplanes. The device exhibits no latch-up per JEDEC JESD78 Class II testing and tolerates transient overshoot up to ±2 kV HBM ESD without functional disruption.