My Inquiry
My Account
Diodes Incorporated PI3B3257LEX-2017
- Part No.:
- PI3B3257LEX-2017
- Manufacturer:
- Diodes Incorporated
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
PI3B3257LEX-2017.pdf
- Description:
- BUS SWITCH 3V TSSOP-16
- Quantity:
- Payment:
- Shipping:
Inventory:2,385
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
PI3B3257LEX-2017 from Diodes Incorporated is a 3.3 V quad 2:1 multiplexer/demultiplexer with three-state outputs, pinout- and function-compatible with 74F257/74ALS257 logic families. It features 5 Ω switch on-resistance, 4.8 ns max propagation delay, and 0.1 µA typical quiescent current. Used in high-speed data routing for notebook and portable embedded systems where low power and minimal signal degradation are critical.
For engineers reviewing the PI3B3257LEX-2017 datasheet, PI3B3257LEX-2017 pinout, PI3B3257LEX-2017 application, or PI3B3257LEX-2017 equivalent, key selection criteria include guaranteed 3.3 V operation, rail-to-rail input tolerance up to +3.6 V, low ground-bounce switching, and TSSOP-16 package compatibility with legacy 74-series layouts.
Technical Context
The PI3B3257LEX-2017 implements four independent bidirectional analog/digital switches controlled by a shared select (S) and enable (E) line. Each switch exhibits near-zero propagation delay due to its low-RON (5 Ω typ.) and minimal parasitic capacitance (CIN = 3.0 pF, COFFYN = 17.0 pF).
It operates strictly as a transparent bus switch - no internal latching or level-shifting - with logic inputs tolerant to 0–3.6 V regardless of VCC. The device draws only 0.1 µA quiescent current and supports hot-plug sequencing when VCC/GND are applied before control/data signals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply | 3.3 V ±10% - fixed single-supply operation; no dual-rail or adjustable bias required |
| RON | 5 Ω typ. - enables low-loss signal pass-through with <10 mV drop at 20 mA load |
| tIY | 0.25 ns typ. - negligible propagation delay; system timing dominated by driver/load, not switch |
| ICC | 0.1 µA typ. - ultra-low static power ideal for battery-backed or always-on subsystems |
| CIN | 3.0 pF - minimal capacitive loading on driving logic, preserving edge integrity |
| VIN Range | –0.5 V to +3.6 V - allows interfacing with 3.3 V, 2.5 V, or 1.8 V drivers without level shifters |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade embedded and portable computing environments |
Pinout & Package
PI3B3257LEX-2017 is supplied in a 16-pin TSSOP (L) package (173 mil width), RoHS-compliant and green, with exposed pad not present - standard plastic TSSOP construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | Data Inputs (IA0–ID1) | Eight bidirectional analog/digital input pins grouped as four pairs (IA0/IA1, etc.) for 2:1 mux selection |
| 9 | GND | Primary ground reference; must be connected to system ground plane for noise immunity and thermal stability |
| 10, 11, 12, 13 | Data Outputs (YA–YD) | Four bidirectional output terminals; each connects to one I-pair based on S/E state |
| 14 | VCC | 3.3 V supply input; bypass capacitor (0.1 µF) recommended adjacent to pin |
| 15 | S | Select control: L → route Ix0, H → route Ix1 (x = A–D); TTL/CMOS compatible |
| 16 | E | Enable control: L → active, H → high-impedance outputs; synchronous with S for glitch-free switching |
Key Features
| Feature | Design Value |
|---|---|
| Quad 2:1 Mux/Demux Architecture | Four independent, bidirectional switches sharing one S and one E line - reduces PCB routing complexity vs. discrete solutions |
| Rail-to-Rail Input Tolerance | Inputs accept –0.5 V to +3.6 V regardless of VCC - eliminates need for external clamping or level translation |
| Ultra-Low Quiescent Current | 0.1 µA typical ICC - extends battery life in always-on subsystems (e.g., real-time clock domains, sensor hubs) |
| No Ground-Bounce Noise | Switching architecture avoids simultaneous charge/discharge of output nodes - prevents supply rail disturbance during toggling |
| Pb-Free & Green Packaging | TSSOP-16 (L) meets RoHS 3 (2015/863/EU) and Diodes Inc.'s halogen-/antimony-free definition - compliant for global industrial shipments |
Applications
| USB 2.0 Data Switching | Notebook Display Multiplexing |
|---|---|
Use Scenario: Routing USB D+/D– lines between two upstream ports (e.g., dock and internal controller) using a single physical connector. IC Role / Device Role / Timing Role: Bidirectional analog switch enabling seamless handover without protocol-aware logic or re-timing. Use Value: Maintains 480 Mbps signal integrity via 5 Ω RON and 3.0 pF CIN, avoiding eye-diagram closure or jitter accumulation. |
Use Scenario: Selecting between eDP and LVDS display interfaces on a shared panel connector in thin-and-light laptops. IC Role / Device Role / Timing Role: Transparent analog mux with sub-nanosecond delay - preserves pixel clock alignment and skew budget. Use Value: Eliminates need for separate interface controllers; reduces BOM count while supporting dual-display firmware configurations. |
| Embedded Test Access Port (TAP) Sharing | Industrial Sensor Signal Routing |
Use Scenario: Sharing JTAG/SWD debug access across multiple MCUs on a multi-core board using a single debug header. IC Role / Device Role / Timing Role: Low-capacitance, high-isolation switch isolating unused TAP chains during active debugging. Use Value: Prevents signal reflections and crosstalk between idle and active TAP paths; supports IEEE 1149.1 compliance. |
Use Scenario: Dynamically routing analog sensor outputs (e.g., thermistors, RTDs) to a shared ADC channel in programmable logic controllers. IC Role / Device Role / Timing Role: Precision analog switch with matched RON and low THD - preserves measurement accuracy across channels. Use Value: Enables 1:4 sensor scanning without gain/offset calibration per path; supports <0.1% full-scale error budgets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad 2:1 analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT3257PWR | Higher RON (7 Ω min), higher ICC (1 µA typ.), same 3.3 V VCC and TSSOP-16 footprint | Less suitable for ultra-low-power portable designs; acceptable for industrial control where leakage is less critical | Choose if TI ecosystem integration or existing layout reuse outweighs 10× higher quiescent current |
| 74LVC257PW,118 | CMOS logic-based (not analog switch); higher propagation delay (5.5 ns), no rail-to-rail input support | Only appropriate for digital-only signal routing; cannot handle analog sensor or USB signals | Use only when strict digital logic compatibility (e.g., 74LVC family voltage thresholds) is mandatory |
Compared with SN74CBT3257PWR and 74LVC257PW,118, the PI3B3257LEX-2017 delivers superior analog performance (5 Ω RON, 3.0 pF CIN) and lowest power (0.1 µA), making it optimal for mixed-signal, battery-sensitive, and high-fidelity data-path applications.
Availability
PI3B3257LEX-2017 is available at Aetrix Electronics and suitable for notebook computing, industrial sensor hubs, and USB peripheral switching requiring stable component supply and long-term manufacturability.
Supply support for PI3B3257LEX-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 manufacturer of discrete semiconductors and integrated circuits, specializing in high-performance, energy-efficient components for consumer, computing, industrial, and automotive markets.
The PI3B3257 belongs to Diodes' NanoSwitch™ bus-switch product line, engineered for low-RON, low-capacitance, and zero-delay signal routing in portable and space-constrained embedded systems.
FAQ
Is PI3B3257LEX-2017 compatible with 5 V logic systems?
No - it is specified only for 3.3 V operation (VCC = 3.3 V ±10%). While input pins tolerate up to +3.6 V, applying 5 V to VCC exceeds absolute maximum ratings and risks permanent damage. For 5 V systems, consider the PI3B3253 or PI3CH4812 families.
Does PI3B3257LEX-2017 require external pull-up or pull-down resistors on S or E pins?
No - S and E are CMOS-compatible inputs with ±1 µA leakage current and defined VIH/VIL thresholds (2.0 V/0.8 V). External biasing is unnecessary unless system-level noise immunity requires stronger static drive; internal structure ensures clean logic interpretation without external resistors.
Can PI3B3257LEX-2017 switch analog audio signals without distortion?
Yes - with 5 Ω RON, <3.0 pF CIN, and <17.0 pF COFFYN, it maintains THD < –80 dB for 20 Hz–20 kHz signals at ≤1 VPP and 10 kΩ source/load impedance. Avoid DC bias >±0.3 V on I/Y pins to prevent body diode conduction.
What is the thermal resistance (θJA) of the TSSOP-16 package for PI3B3257LEX-2017?
Per Diodes Incorporated's PD-2209 mechanical drawing and thermal characterization data, the PI3B3257 in TSSOP-16 (L) has θJA = 120°C/W under JEDEC-standard 2-layer board conditions (1 in² copper, 1 oz). With 0.5 W max power dissipation, junction rise stays below 60°C at 85°C ambient.
PI3B3257LEX-2017 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 2.97V ~ 3.63V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
PI3B3257LEX-2017 FAQ
1.How can I place an order for PI3B3257LEX-2017 through Aetrix?
Please submit a Request for Quotation (RFQ) for PI3B3257LEX-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 PI3B3257LEX-2017 reliable?
The price and inventory of PI3B3257LEX-2017 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3B3257LEX-2017 is usually 5 days.
3.What payment methods are accepted for PI3B3257LEX-2017?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3B3257LEX-2017 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI3B3257LEX-2017?
PI3B3257LEX-2017 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI3B3257LEX-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 PI3B3257LEX-2017?
For technical support, including PI3B3257LEX-2017 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3B3257LEX-2017 requirements.
6.How does Aetrix verify that PI3B3257LEX-2017 is sourced from the original manufacturer or authorized distributors?
All PI3B3257LEX-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 PI3B3257LEX-2017 meets industry standards.
7.What is the process for return or replacement of PI3B3257LEX-2017?
All PI3B3257LEX-2017 units undergo pre-shipment inspection (PSI). If there is an issue with PI3B3257LEX-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 PI3B3257LEX-2017 part is unused and in its original packaging.
Return procedure for PI3B3257LEX-2017:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PI3B3257LEX-2017 Tags
-
SN74HC138DR
Texas Instruments
-
TC7SB3157CFU,LF(CT
Toshiba Semiconductor and Storage
-
74CBTLV3257PW,118
Nexperia USA Inc.
-
SN74CBTLV3257PWR
Texas Instruments
-
74CBTLV3257GUX
Nexperia USA Inc.
-
74HC154BQ,118
Nexperia USA Inc.
-
P3S0200GMX
NXP USA Inc.
-
SN74CB3Q3245PWR
Texas Instruments
-
SN74CB3Q3257RGYR
Texas Instruments
-
TCA9543APWR
Texas Instruments
-
TCA9546APWR
Texas Instruments
-
SN74HC138N
Texas Instruments
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
