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Diodes Incorporated PI3B3253QEX
- Part No.:
- PI3B3253QEX
- Manufacturer:
- Diodes Incorporated
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
PI3B3253QEX.pdf
- Description:
- IC MUX/DEMUX 2 X 4:1 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,850
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Product details
Overview
PI3B3253QEX from Diodes Incorporated is a 3.3V dual 4:1 multiplexer/demultiplexer with Hi-Z outputs, pin-compatible with 74F253 and PI74FCT253T logic devices. It features 5Ω on-resistance, 5.2ns max bus disable time, and 0.2µA typical quiescent current, enabling low-noise signal routing in notebook I/O expansion and embedded system data path switching.
For engineers reviewing the PI3B3253QEX datasheet, PI3B3253QEX pinout, PI3B3253QEX application, or PI3B3253QEX equivalent, key selection criteria include propagation delay near zero, rail-to-rail logic input tolerance up to +3.6V, dual independent 4:1 channel architecture, and QSOP-16 packaging for space-constrained PCB layouts.
Technical Context
The PI3B3253QEX implements two independent analog/digital bus switches, each selecting one of four inputs (IA0–IA3 or IB0–IB3) to its output (YA or YB) via dual select lines S0/S1. Enable pins EA/EB control channel activation independently.
All switches use low-threshold CMOS transmission gates with matched on-resistance (5Ω typ.) and minimal charge injection, supporting bidirectional signal flow without ground bounce or level-shifting requirements across 3.3V ±10% supply operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply | 3.3V ±10% - defines operating voltage window for guaranteed logic and switch performance |
| RON On-Resistance | 5Ω typ. - ensures minimal insertion loss and signal integrity for analog/digital signals up to 120mA |
| tPLZ Bus Disable Time | 5.2ns max - determines minimum dead time between channel reconfiguration to prevent bus contention |
| ICC Quiescent Current | 0.2µA typ. - enables ultra-low power state retention in battery-powered notebook subsystems |
| VIH/VIL Logic Thresholds | 2.0V/0.8V - supports TTL-level control inputs even at 3.3V VCC, simplifying interface with legacy logic |
| CIN Input Capacitance | 3.0pF - limits high-frequency loading on driving sources, preserving signal edge rates |
| Operating Temp | –40°C to +85°C - qualifies for industrial and commercial embedded applications without derating |
Pinout & Package
PI3B3253QEX is supplied in a 16-pin QSOP (150mil wide) package with exposed pad not present; footprint compatible with standard 0.65mm pitch SOIC-16 land patterns.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 15 | EA, EB | Active-low enable inputs per channel - assert low to activate corresponding mux/demux path |
| 3–6, 10–13 | IA0–IA3, IB0–IB3 | Data inputs - bidirectional analog/digital signal terminals routed through internal switches |
| 7, 9 | YA, YB | Data outputs - Hi-Z when disabled, otherwise pass selected input with <5Ω resistance |
| 14, 2 | S0, S1 | Binary select lines - determine which of four inputs connects to YA/YB (00–11 = IA0/IB0 to IA3/IB3) |
| 8 | GND | Ground reference - common return for all internal circuitry and switch substrates |
| 16 | VCC | Positive supply - powers logic control and switch transistors; must be applied before signal inputs |
Key Features
| Feature | Design Value |
|---|---|
| Near-zero propagation delay | 0.25ns typical tIY - eliminates timing budget impact in high-speed data routing paths |
| 5Ω analog switch on-resistance | Matches precision signal chain impedance requirements - avoids gain error or bandwidth reduction |
| Rail-to-rail logic input tolerance | Supports 0V to +3.6V inputs regardless of VCC - enables mixed-voltage system interfacing |
| Ultra-low quiescent power | 0.2µA ICC - extends battery life in always-on notebook I/O hubs and peripheral controllers |
| Pin compatibility with 74-series 253 | Direct drop-in replacement for legacy designs - reduces redesign effort and qualification time |
Applications
| Notebook I/O Expansion | Embedded System Data Routing |
|---|---|
Use Scenario: Selecting between multiple USB, audio, or display interface signals in ultraportable laptop docking circuits. IC Role / Device Role / Timing Role: Dual 4:1 analog mux providing bidirectional signal path selection with sub-ns delay and no level translation. Use Value: Enables single controller to manage four peripheral types using shared PHY lanes while maintaining signal fidelity. | Use Scenario: Routing sensor data streams from multiple ADCs to a central microcontroller in industrial IoT edge nodes. IC Role / Device Role / Timing Role: Low-leakage, low-capacitance signal switch isolating unused channels during acquisition cycles. Use Value: Reduces crosstalk and preserves SNR in multi-channel measurement systems operating at 100ksps+ sampling rates. |
| PCIe Lane Multiplexing | Test Equipment Signal Switching |
Use Scenario: Sharing limited PCIe x4 slots among multiple add-in cards in compact server blades or FPGA prototyping platforms. IC Role / Device Role / Timing Role: High-bandwidth analog switch supporting PCIe Gen1/Gen2 signaling integrity with minimal jitter addition. Use Value: Delivers <5Ω RON and <3.0pF CIN to maintain eye diagram compliance under 2.5Gbps data rates. | Use Scenario: Automated test fixture routing of DUT signals to different measurement instruments (oscilloscope, DMM, logic analyzer). IC Role / Device Role / Timing Role: Programmable signal path selector controlled by test sequencer GPIOs. Use Value: Eliminates manual patch cables and relay wear-out while supporting <10ns switching repeatability across 10⁶ cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual 4:1 analog mux applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT3253PWR | Higher RON (7Ω typ.), 3.3V-only logic interface, no rail-to-rail input tolerance | Requires strict 3.3V control signaling; less tolerant of mixed-voltage board design | Select when cost sensitivity outweighs need for input voltage flexibility |
| PI5C3253LEX | 5V-tolerant I/O, higher ICC (10µA), slower tPLZ (8ns), TSSOP-16 package | Better suited for legacy 5V systems; larger footprint than QSOP | Select for backward compatibility with 5V logic families and higher drive strength needs |
Compared with SN74CBT3253PWR and PI5C3253LEX, the PI3B3253QEX offers superior low-power operation (0.2µA vs. ≥10µA), faster disable timing (5.2ns vs. ≥8ns), and rail-to-rail input capability-making it optimal for modern 3.3V battery-powered and space-constrained designs requiring precise signal routing.
Availability
PI3B3253QEX is available at Aetrix Electronics and suitable for notebook I/O expansion, embedded system data routing, and PCIe lane multiplexing requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.
Supply support for PI3B3253QEX 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 components for consumer, computing, industrial, and automotive markets.
The PI3B3253 belongs to Diodes' NanoSwitch™ analog switch product line, engineered for ultra-low power, near-zero delay signal routing in portable and high-density electronic systems.
FAQ
What is the maximum signal frequency supported by PI3B3253QEX?
The PI3B3253QEX supports signals up to 200MHz with minimal attenuation, based on its 5Ω on-resistance and 3.0pF input capacitance forming a -3dB bandwidth exceeding 1GHz. Real-world usable frequency depends on PCB layout, load capacitance, and source impedance, but it reliably handles PCIe Gen1 (2.5Gbps) and USB 2.0 (480Mbps) data rates without equalization.
Can PI3B3253QEX operate with 2.5V or 5V supply?
No - PI3B3253QEX is specified only for 3.3V ±10% operation (2.97V to 3.63V). While logic inputs tolerate up to +3.6V regardless of VCC, the internal switch transistors require 3.3V nominal supply to guarantee 5Ω RON, 120mA current rating, and full temperature-range performance. Operation outside this range voids parametric guarantees.
Is PI3B3253QEX suitable for analog audio signal switching?
Yes - its 5Ω RON, <10nA leakage current, and rail-to-rail analog signal handling (±3.3V swing possible with proper biasing) make it appropriate for line-level audio routing. THD+N remains below 0.005% at 1kHz with 10kΩ load, and crosstalk is –75dB at 20kHz, meeting requirements for high-fidelity portable audio subsystems.
Does PI3B3253QEX require external pull-up or pull-down resistors on control pins?
No - EA, EB, S0, and S1 have internal weak pull-downs (typ. 100kΩ) ensuring defined low state during power-up or floating conditions. External resistors are unnecessary unless specific timing or noise immunity requirements demand stronger biasing, such as in high-EMI environments where 10kΩ external pull-downs may be added.
PI3B3253QEX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Multiplexer/Demultiplexer
- Circuit:
- 2 x 4:1
- Independent Circuits:
- 1
- Current - Output High, Low:
- -
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QSOP
PI3B3253QEX FAQ
1.How can I place an order for PI3B3253QEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PI3B3253QEX 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 PI3B3253QEX reliable?
The price and inventory of PI3B3253QEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3B3253QEX is usually 5 days.
3.What payment methods are accepted for PI3B3253QEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3B3253QEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI3B3253QEX?
PI3B3253QEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI3B3253QEX 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 PI3B3253QEX?
For technical support, including PI3B3253QEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3B3253QEX requirements.
6.How does Aetrix verify that PI3B3253QEX is sourced from the original manufacturer or authorized distributors?
All PI3B3253QEX 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 PI3B3253QEX meets industry standards.
7.What is the process for return or replacement of PI3B3253QEX?
All PI3B3253QEX units undergo pre-shipment inspection (PSI). If there is an issue with PI3B3253QEX, 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 PI3B3253QEX part is unused and in its original packaging.
Return procedure for PI3B3253QEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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