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Home > Products > Integrated Circuits (ICs) > Logic > Signal Switches, Multiplexers, Decoders

Diodes Incorporated PI5C3257QE

Name: PI5C3257QE
Brand: Diodes Incorporated
SKU: PI5C3257QE
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PI5C3257QE

Manufacturer:: Diodes Incorporated

Category:: Signal Switches, Multiplexers, Decoders

Package:: 16-SSOP (0.154", 3.90mm Width)

Datasheet:: PI5C3257QE.pdf

Description:: IC MUX/DEMUX 4 X 2:1 16QSOP

Quantity:: RFQ Add To RFQ list

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Inventory:4,088

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Product details

Overview

PI5C3257QE from Diodes Incorporated is a quad 2:1 analog multiplexer/demultiplexer bus switch with three-state outputs, pinout- and function-compatible with 74F257/74ALS257 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. Used in high-speed data routing for notebook and embedded I/O expansion.

For engineers reviewing the PI5C3257QE datasheet, PI5C3257QE pinout, PI5C3257QE application, or PI5C3257QE equivalent, key selection criteria include on-resistance matching, enable/select timing (tPZH ≤ 4.8 ns), bus-switch isolation during disable, and QSOP-16 footprint compatibility with legacy 74-series layouts.

Technical Context

The PI5C3257QE implements four independent bidirectional 2:1 analog switches controlled by a shared select (S) and enable (E) input. Each switch connects either IA/IB, IC/ID pair to YA/YB/YC/YD output with no level-shifting-supporting rail-to-rail signal pass-through at V_CC = 5V ±5%.

Its architecture eliminates ground bounce and propagation delay accumulation via low-R_ON MOSFET switches and direct bus coupling when enabled. Control logic uses TTL-compatible thresholds (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V) and exhibits 150 mV hysteresis on S/E pins for noise immunity.

Key Specifications

Parameter	Value and Actual Design Meaning
On-Resistance	5 Ω typical - enables minimal voltage drop and signal distortion in 5V digital bus switching
Propagation Delay (I→Y)	0.25 ns - preserves signal integrity in high-speed parallel data paths without added latency
Quiescent Supply Current	0.2 µA typical - supports battery-powered operation in portable systems like notebooks
Input Capacitance	6 pF - reduces loading on driving sources and maintains fast edge rates
Switch Off Capacitance	6 pF - ensures high off-isolation (>40 dB at 10 MHz) between unselected channels
Operating Temperature	–40°C to +85°C - qualified for industrial-grade embedded control and computing applications
Supply Voltage Range	–0.5 V to +7.0 V - allows safe interface with 3.3V/5V mixed-voltage systems and transient tolerance

Pinout & Package

PI5C3257QE is supplied in a 16-pin QSOP (150-mil wide) package with standard JEDEC MS-013AC dimensions and gull-wing leads. Pin 1 marked by notch or beveled corner.

Pin/Terminal	Circuit Role	Design Meaning
E	Global Enable Input	Active-low control: disables all four switches simultaneously into high-impedance state
S	Common Select Input	Chooses between I0/I1 inputs per channel; determines which data path is connected to Y output
IA0–ID1	Data Inputs (8 total)	Bidirectional analog/digital inputs; each pair (e.g., IA0/IA1) feeds one multiplexer channel
YA–YD	Switched Outputs (4 total)	Three-state outputs reflecting selected input; high-Z when E = HIGH
V_CC	Positive Supply	5V nominal power rail; powers internal logic and switch drivers
GND	Ground Reference	Return path for supply and signal currents; critical for low-noise switching performance

Key Features

Feature	Design Value
Quad 2:1 Mux/DeMux Functionality	Four independent bidirectional switches enable flexible I/O resource sharing across multiple peripherals
5Ω On-Resistance	Minimizes insertion loss and crosstalk in 50Ω-terminated or low-impedance digital buses
Near-Zero Propagation Delay	0.25 ns delay ensures timing-critical parallel interfaces (e.g., address/data buses) remain synchronous
Ultra-Low Quiescent Current	0.2 µA enables always-on I/O routing in sleep-mode systems without compromising battery life
Pb-Free & Halogen-Free Construction	RoHS 3 and "Green" compliant (Br+Cl <1500 ppm, Sb <1000 ppm) for environmentally regulated deployments

Applications

PCI Express Lane Multiplexing

Notebook I/O Expansion Hub

Use Scenario: Dynamic allocation of PCIe lanes between discrete GPU and integrated graphics in dual-graphics laptops.

IC Role / Device Role / Timing Role: Bidirectional analog switch enabling physical lane reconfiguration without protocol layer intervention.

Use Value: Eliminates need for dedicated PCIe switch ICs; leverages existing 5Ω R_ON and sub-nanosecond delay to maintain Gen3 signal integrity.

Use Scenario: Sharing USB 2.0, SMBus, and GPIO lines between baseband processor and modem in ultra-thin notebooks.

IC Role / Device Role / Timing Role: Low-latency, low-power I/O multiplexer allowing shared peripheral access during system suspend/resume cycles.

Use Value: 0.2 µA quiescent current extends battery runtime; 0.25 ns delay avoids timing violations in 480 Mbps USB signaling.

Industrial PLC Backplane Switching

Test Equipment Signal Routing Matrix

Use Scenario: Reconfigurable I/O mapping on modular PLC backplanes supporting mixed-voltage sensor/actuator modules.

IC Role / Device Role / Timing Role: Voltage-transparent analog switch enabling hot-swap-compatible signal routing between fieldbus controllers and terminal blocks.

Use Value: –0.5 V to +7.0 V absolute max rating protects against ESD and wiring transients; 6 pF C_IN minimizes capacitive loading on long traces.

Use Scenario: Automated test fixture that routes DUT signals to multiple measurement instruments (oscilloscope, DMM, logic analyzer).

IC Role / Device Role / Timing Role: High-isolation, low-R_ON switch providing repeatable signal path selection under software control.

Use Value: 6 pF C_OFF ensures >40 dB off-isolation at 10 MHz; QSOP-16 footprint simplifies PCB layout for dense matrix arrays.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74CBT3257PW	Higher R_ON (7 Ω typ), higher ICC (5 µA), same QSOP-16 package	Less suitable for ultra-low-power designs; marginally higher insertion loss	Select if TI ecosystem alignment or legacy BOM reuse is prioritized over lowest quiescent current
74LVC257PW	CMOS logic-based (not analog switch); higher propagation delay (5 ns), no rail-to-rail analog pass-through	Only appropriate for purely digital control-path multiplexing, not analog/data bus routing	Choose only for pure logic-level selection where analog transparency and low R_ON are unnecessary

Compared with SN74CBT3257PW and 74LVC257PW, PI5C3257QE delivers superior analog performance (5 Ω vs. 7 Ω), lower power (0.2 µA vs. 5 µA), and true bidirectional signal transparency-making it optimal for high-fidelity data bus switching where signal integrity and energy efficiency are co-critical.

Availability

PI5C3257QE is available at Aetrix Electronics and suitable for notebook I/O expansion, industrial PLC backplane routing, and automated test equipment signal matrices requiring stable component supply and RoHS-compliant sourcing.

Supply support for PI5C3257QE 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 integrated circuits, specializing in high-performance, energy-efficient solutions for power management, signal integrity, and protection.

The PI5C3257 belongs to Diodes' Pericom® bus switch product line, engineered specifically for low-latency, low-power analog signal routing in portable computing, industrial control, and test instrumentation platforms.

FAQ

What is the maximum data rate supported by PI5C3257QE?

The PI5C3257QE does not specify a formal data rate limit but supports full-speed USB 2.0 (480 Mbps) and PCIe Gen3 (8 GT/s) signal routing due to its 0.25 ns propagation delay and 6 pF input/output capacitance. System-level bandwidth is determined by trace impedance, load capacitance, and driver strength-not the switch itself.

Can PI5C3257QE operate at 3.3V supply?

Yes. While characterized at V_CC = 5V ±5%, the device supports V_CC down to 4.5V per Absolute Maximum Ratings. For 3.3V operation, use the pin-compatible PI3CH257 or PI3CH4257, which are explicitly rated for 3.3V logic and lower R_ON at reduced voltage.

Is PI5C3257QE suitable for analog audio signal switching?

No. Its 5Ω R_ON and 6 pF capacitance are optimized for digital bus switching up to ~500 MHz, not low-distortion audio paths. Audio applications require dedicated low-THD analog switches (e.g., TS5A23157) with specified harmonic distortion and crosstalk performance.

Does PI5C3257QE require external pull-up or pull-down resistors on control pins?

No. The S and E inputs have TTL-compatible thresholds and 150 mV hysteresis, allowing direct connection to CMOS/TTL logic outputs. External biasing is unnecessary unless floating states must be avoided during power-up; in such cases, 10 kΩ pull-downs on E and S ensure default disable.

PI5C3257QE Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 16-SSOP (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Active

Type:: Multiplexer/Demultiplexer

Circuit:: 4 x 2:1

Independent Circuits:: 1

Current - Output High, Low:: -

Voltage Supply Source:: Single Supply

Voltage - Supply:: 4.75V ~ 5.25V

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-QSOP

PI5C3257QE FAQ

1.How can I place an order for PI5C3257QE through Aetrix?

Please submit a Request for Quotation (RFQ) for PI5C3257QE on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for PI5C3257QE reliable?

The price and inventory of PI5C3257QE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI5C3257QE is usually 5 days.

3.What payment methods are accepted for PI5C3257QE?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI5C3257QE transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PI5C3257QE?

PI5C3257QE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PI5C3257QE order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for PI5C3257QE?

For technical support, including PI5C3257QE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI5C3257QE requirements.

6.How does Aetrix verify that PI5C3257QE is sourced from the original manufacturer or authorized distributors?

All PI5C3257QE products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that PI5C3257QE meets industry standards.

7.What is the process for return or replacement of PI5C3257QE?

All PI5C3257QE units undergo pre-shipment inspection (PSI). If there is an issue with PI5C3257QE, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The PI5C3257QE part is unused and in its original packaging.

Return procedure for PI5C3257QE:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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