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Diodes Incorporated PI3B3257LE-2017
- Part No.:
- PI3B3257LE-2017
- Manufacturer:
- Diodes Incorporated
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
PI3B3257LE-2017.pdf
- Description:
- IC MUX/DEMUX 4 X 2:1 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,285
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Product details
Overview
PI3B3257LE-2017 from Diodes Incorporated is a 3.3 V quad 2:1 multiplexer/demultiplexer with three-state outputs, pinout- and function-compatible with 74F257 and 74ALS257 logic families. It features 5 Ω switch on-resistance, 4.8 ns max disable time, 0.1 µA typical quiescent current, and operates across –40°C to +85°C ambient. Used in notebook I/O routing and low-power signal switching applications.
For engineers reviewing the PI3B3257LE-2017 datasheet, PI3B3257LE-2017 pinout, PI3B3257LE-2017 application, or PI3B3257LE-2017 equivalent, key selection criteria include low on-resistance (5 Ω), rail-to-rail input tolerance up to +3.6 V, ultra-low ICC (0.1 µA typ), and compatibility with legacy 74-series logic footprints in TSSOP-16 packaging.
Technical Context
The PI3B3257LE-2017 implements four independent bidirectional analog/digital switches controlled by a shared enable (E) and select (S) line. Each switch connects one of two inputs (IA0/IA1, IB0/IB1, etc.) to its corresponding output (YA–YD) with near-zero propagation delay and no ground bounce.
Its CMOS bus-switch architecture supports rail-to-rail input operation up to +3.6 V regardless of VCC = 3.3 V ±10%, enabling mixed-voltage interface bridging. The device draws only 0.1 µA quiescent current and exhibits 3.0 pF input capacitance and 17.0 pF YN-off capacitance - critical for high-speed signal integrity in compact portable designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply | 3.3 V ±10% - matches standard low-voltage logic rails; enables direct integration with 3.3 V microcontrollers and FPGAs |
| RON On-Resistance | 5 Ω typ - ensures minimal voltage drop and signal attenuation when routing 120 mA peak currents |
| tPZL Disable Time | 4.8 ns max - guarantees fast bus isolation during dynamic reconfiguration without glitches |
| ICC Quiescent Current | 0.1 µA typ - extends battery life in always-on notebook subsystems and portable I/O hubs |
| Input Voltage Range | –0.5 V to +4.6 V - supports rail-to-rail logic inputs up to +3.6 V, enabling safe interfacing with 5 V-tolerant drivers |
| Operating Temp | –40°C to +85°C - qualified for industrial and commercial embedded environments without derating |
| CIN Input Capacitance | 3.0 pF - reduces loading on driving sources and preserves rise/fall times in >100 MHz data paths |
Pinout & Package
PI3B3257LE-2017 is packaged in 16-pin TSSOP (L), with exposed pad thermal design per MO-248E. Pin 1 is top-left corner marked by index area; GND (Pin 12) and VCC (Pin 11) are adjacent for low-inductance decoupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| E | Global Enable | Active-low control that places all YA–YD outputs in high-impedance state when high |
| S | Mux Select | Chooses between IA0/IB0/IC0/ID0 (S = L) or IA1/IB1/IC1/ID1 (S = H) for each channel |
| IA0–ID1 | Data Inputs | Eight bidirectional analog/digital inputs; tolerate up to +3.6 V independent of VCC |
| YA–YD | Data Outputs | Four switched outputs; present selected input or Hi-Z based on E/S states |
| VCC | Power Supply | 3.3 V supply pin; requires local 0.1 µF ceramic decoupling to Pin 12 (GND) |
| GND | Ground Reference | Primary return path; Pin 12 must be connected to system ground plane; exposed pad is electrically tied to GND |
Key Features
| Feature | Design Value |
|---|---|
| Quad 2:1 Mux/Demux Function | Four independent channels allow simultaneous routing of four separate data pairs - ideal for PCIe lane switching or dual-display video path selection |
| 5 Ω Switch On-Resistance | Minimizes insertion loss and distortion in analog sensor signal paths and digital clock distribution networks |
| 0.1 µA Typical ICC | Enables always-on status monitoring in battery-backed systems without measurable drain impact |
| Pin Compatibility with 74-Series Logic | Direct replacement for obsolete 74F257/74ALS257 in legacy designs - eliminates PCB redesign and qualification effort |
| Rail-to-Rail Input Tolerance | Accepts 0 V to +3.6 V inputs at VCC = 3.3 V - simplifies level-shifting in mixed-voltage SoC interfaces |
Applications
| USB 2.0 Data Switching | Notebook Display Multiplexing |
|---|---|
|
Use Scenario: Dynamic selection between two USB 2.0 upstream hosts sharing a single downstream peripheral. IC Role / Device Role / Timing Role: Bidirectional analog switch routing D+ and D− signals with <5 Ω resistance and sub-5 ns disable timing. Use Value: Maintains full-speed USB 2.0 signal integrity (480 Mbps) without added jitter or reflection due to low RON and matched trace routing. |
Use Scenario: Routing LVDS or eDP video signals between integrated GPU and discrete GPU outputs in dual-GPU notebooks. IC Role / Device Role / Timing Role: Quad 2:1 mux selecting between GPU-A and GPU-B pixel data lanes under OS-level graphics driver control. Use Value: Enables seamless GPU switching without display flicker or black screen, leveraging fast tPZL (4.8 ns) and low inter-channel skew. |
| Industrial Sensor Hub Interface | Low-Power FPGA I/O Expansion |
|
Use Scenario: Consolidating analog outputs from multiple temperature/pressure sensors into a single ADC input channel. IC Role / Device Role / Timing Role: Analog multiplexer with 5 Ω RON and 3.0 pF CIN, minimizing settling error and crosstalk between sensor channels. Use Value: Achieves <12-bit effective resolution across 4 sensor inputs without external buffering or calibration overhead. |
Use Scenario: Expanding limited FPGA I/O banks to support additional SPI, I²C, or GPIO peripherals in space-constrained edge nodes. IC Role / Device Role / Timing Role: Digital signal router enabling dynamic assignment of FPGA pins to different peripheral functions via S/E control. Use Value: Reduces required FPGA package size and BOM count while maintaining full-speed communication (≥25 MHz SPI) through low-delay switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad 2:1 mux/demux applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT3257PWR | Higher RON (7 Ω typ), higher ICC (1 µA typ), same 3.3 V supply and TSSOP-16 footprint | Less suitable for battery-critical notebook subsystems due to 10× higher quiescent current | Prefer when TI ecosystem alignment or existing PWR tape/reel logistics outweigh ultra-low power needs |
| 74LVC257PW,118 | CMOS-based, 32 Ω RON, 3.3 V only, no rail-to-rail input tolerance (max VIN = VCC + 0.3 V) | Cannot interface with +3.6 V tolerant drivers; unsuitable for mixed-voltage hot-swap scenarios | Select only in cost-sensitive, non-battery, fixed-rail designs where signal speed and RON are secondary |
Compared with SN74CBT3257PWR and 74LVC257PW,118, the PI3B3257LE-2017 delivers superior low-power performance (0.1 µA vs. ≥1 µA), lower on-resistance (5 Ω vs. ≥7 Ω), and robust +3.6 V input tolerance - making it optimal for portable, mixed-voltage, and high-fidelity signal routing applications.
Availability
PI3B3257LE-2017 is available at Aetrix Electronics and suitable for notebook I/O routing, industrial sensor hub consolidation, and low-power FPGA I/O expansion requiring stable component supply and long-term lifecycle assurance.
Supply support for PI3B3257LE-2017 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 semiconductor company specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and connectivity applications.
The PI3B3257 belongs to Diodes' NanoSwitch™ bus-switch product line, engineered for ultra-low power, high-speed signal routing in portable computing and industrial edge devices where board space and battery life are constrained.
FAQ
Is PI3B3257LE-2017 compatible with 5 V logic inputs?
No - the device accepts inputs up to +3.6 V maximum, regardless of VCC = 3.3 V. Driving inputs above +3.6 V violates absolute maximum ratings and risks permanent damage. For true 5 V-tolerant operation, consider Diodes' PI5C3257 or similar 5 V bus switches.
Does the exposed pad on the TSSOP package require soldering?
Yes - the exposed center pad is electrically connected to GND and must be soldered to a thermal pad on the PCB. Thermal vias beneath the pad are recommended to ensure proper heat dissipation and electrical stability, especially under sustained 120 mA per channel loads.
Can PI3B3257LE-2017 be used for analog audio signal routing?
Yes - with 5 Ω RON, <17 pF off-capacitance, and rail-to-rail capability, it supports line-level analog audio (≤2 Vpp) without audible distortion or crosstalk. However, DC coupling requires matching source/load impedances to avoid bias shift; AC coupling with series capacitors is recommended for headphone or codec interfaces.
What is the maximum capacitive load the outputs can drive reliably?
The device is characterized for CL = 50 pF in switching tests. With 5 Ω RON and 25 pF on-capacitance, it reliably drives ≤50 pF loads at full speed (tIY = 0.25 ns). For loads >50 pF, propagation delay increases linearly with RC time constant; add series termination or buffer amplifiers beyond 100 pF.
PI3B3257LE-2017 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm 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:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
PI3B3257LE-2017 FAQ
1.How can I place an order for PI3B3257LE-2017 through Aetrix?
Please submit a Request for Quotation (RFQ) for PI3B3257LE-2017 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 PI3B3257LE-2017 reliable?
The price and inventory of PI3B3257LE-2017 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3B3257LE-2017 is usually 5 days.
3.What payment methods are accepted for PI3B3257LE-2017?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3B3257LE-2017 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI3B3257LE-2017?
PI3B3257LE-2017 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI3B3257LE-2017 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 PI3B3257LE-2017?
For technical support, including PI3B3257LE-2017 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3B3257LE-2017 requirements.
6.How does Aetrix verify that PI3B3257LE-2017 is sourced from the original manufacturer or authorized distributors?
All PI3B3257LE-2017 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 PI3B3257LE-2017 meets industry standards.
7.What is the process for return or replacement of PI3B3257LE-2017?
All PI3B3257LE-2017 units undergo pre-shipment inspection (PSI). If there is an issue with PI3B3257LE-2017, 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 PI3B3257LE-2017 part is unused and in its original packaging.
Return procedure for PI3B3257LE-2017:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PI3B3257LE-2017 Tags
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