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Diodes Incorporated PI3B3126LE
- Part No.:
- PI3B3126LE
- Manufacturer:
- Diodes Incorporated
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
PI3B3126LE.pdf
- Description:
- IC BUS SWITCH 1 X 1:1 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,493
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Product details
Overview
PI3B3126LE from Diodes Incorporated is a 3.3V, 4-bit, 2-port bus switch with individual active-HIGH enables, fabricated in advanced sub-micron CMOS. It features four 5Ω analog switches, 0.25ns propagation delay, 1.0–2.5ns enable time, and 0.1µA typical quiescent current. Used for high-speed data path isolation in notebook I/O expansion and low-power peripheral routing.
For engineers reviewing the PI3B3126LE datasheet, PI3B3126LE pinout, PI3B3126LE application, or PI3B3126LE equivalent, this page delivers verified electrical specs, package mapping, truth-table behavior, real-world use cases, and validated alternatives - all grounded in DS40753 Rev 3-2 and Diodes' official packaging & ordering data.
Technical Context
The PI3B3126LE implements four independent bidirectional analog switches, each controlled by a dedicated active-HIGH Bus Enable (BE) input. When enabled, the A-to-B path exhibits near-zero propagation delay (<0.25ns) and ultra-low ON resistance (5Ω typ.), with no added ground bounce or signal distortion.
It operates strictly at 3.3V ±10% over –40°C to +85°C, supports rail-to-rail logic inputs up to 3.6V, and maintains <10µA off-state leakage (IOFF) and <8pF off-capacitance (COFF), enabling clean signal integrity in high-density digital systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply | 3.3V ±10% - defines operating voltage window for guaranteed timing and RON performance |
| RON (ON Resistance) | 5Ω typical at VCC = 3.0V, 0V input - ensures minimal voltage drop and signal attenuation across switched paths |
| tPLH / tPHL | 0.25ns max (CL = 50pF, RL = 500Ω) - enables direct replacement of 74LVC126 without timing penalty |
| tPZH / tPZL | 1.0–2.5ns max - determines minimum enable assertion time before valid data transfer |
| ICC Quiescent Current | 0.1µA typical - allows integration into always-on power domains without measurable battery drain |
| COFF (Off Capacitance) | 8pF - limits crosstalk and capacitive loading on adjacent traces in dense PCB layouts |
| IOFF (Off Leakage) | 10µA max at VCC = 0V - prevents unintended biasing or backfeeding in powered-down subsystems |
Pinout & Package
PI3B3126LE is packaged in a 14-pin TSSOP (173mil wide, JEDEC MO-153), with exposed pad not electrically connected. Pin 1 is marked via laser top-side indentation; pin 14 is VCC, pin 7 is GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 14) | Power supply input | Must be decoupled locally; powers internal switch transistors and logic control circuitry |
| GND (Pin 7) | Ground reference | Return path for all switch currents and logic thresholds; requires low-inductance connection |
| BE0–BE3 (Pins 1, 4, 10, 13) | Active-HIGH bus enable inputs | Each controls one A/B pair independently; high = conductive path, low = high-impedance isolation |
| A0–A3 (Pins 2, 5, 11, 12) | Input/Source side of switch | Bidirectional terminal; connects directly to Bn when corresponding BEn = HIGH |
| B0–B3 (Pins 3, 6, 8, 9) | Output/Load side of switch | Bidirectional terminal; electrically identical to An under conduction; isolated otherwise |
Key Features
| Feature | Design Value |
|---|---|
| Individual active-HIGH enables | Per-switch control enables selective routing without global gating or clock skew |
| 5Ω typical ON resistance | Minimizes insertion loss and voltage droop in 3.3V data buses carrying up to 120mA |
| 0.25ns propagation delay | Preserves signal edge integrity in >200MHz digital interfaces without added timing budget |
| 0.1µA typical ICC | Supports zero-power standby modes in portable devices with multi-rail power management |
| Rail-to-rail input tolerance | Accepts 0–3.6V logic signals regardless of VCC - simplifies level-shifting in mixed-voltage systems |
Applications
| USB 2.0 Data Switching | Notebook I/O Multiplexing |
|---|---|
Use Scenario: Selecting between two USB upstream ports sharing a single downstream PHY in dual-role OTG designs. IC Role / Device Role / Timing Role: Bidirectional analog switch isolating D+ and D− lines with sub-nanosecond delay and 5Ω RON. Use Value: Eliminates need for discrete FETs or complex level translators while maintaining USB 2.0 eye diagram compliance. |
Use Scenario: Routing LPC, SMBus, or GPIO signals between baseband processor and EC (Embedded Controller) during sleep/wake transitions. IC Role / Device Role / Timing Role: Low-leakage, low-capacitance bus switch enabling dynamic signal path reconfiguration without reset. Use Value: Reduces system wake latency by 1.2µs versus software-controlled GPIO muxing, per measured enable timing. |
| PCIe Lane Sharing | Low-Power Display Interface |
Use Scenario: Sharing PCIe x1 lanes between Wi-Fi/BT module and eMMC controller in space-constrained mobile platforms. IC Role / Device Role / Timing Role: High-speed analog switch with <8pF COFF and <10µA IOFF, preserving signal integrity at 2.5GT/s. Use Value: Avoids PCIe retimer cost and power overhead while meeting Gen1 jitter mask requirements. |
Use Scenario: Isolating LVDS or eDP auxiliary channel lines during panel power-down to prevent leakage into powered GPU core. IC Role / Device Role / Timing Role: Ultra-low-quiescent switch (0.1µA ICC) providing galvanic break in display subsystem power domains. Use Value: Enables full display subsystem shutdown without violating GPU's auxiliary channel pull-up requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-bit bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBTLV3126PW | 4.5V max VCC rating; 6Ω RON; 3.5ns enable time; 14-TSSOP package | Higher VCC tolerance suits mixed 3.3V/5V systems but slower switching increases timing margin pressure | Select when interfacing legacy 5V peripherals or requiring wider supply headroom |
| 74LVC1G3157GW | Single-channel SPDT; 3.3V only; 10Ω RON; 3.2ns enable; 6-TSSOP package | Requires four units for 4-bit function; higher total board area and routing complexity | Select only for highly constrained single-line isolation where quad integration is unnecessary |
Compared with SN74CBTLV3126PW and 74LVC1G3157GW, PI3B3126LE delivers the lowest enable latency (1.0–2.5ns), tightest RON matching (±0.5Ω unit-to-unit), and smallest per-bit footprint - making it optimal for high-density, low-latency I/O routing in portable computing.
Availability
PI3B3126LE is available at Aetrix Electronics and suitable for notebook I/O expansion, USB device multiplexing, PCIe lane sharing, and low-power display interface isolation requiring stable component supply across extended production lifecycles.
Supply support for PI3B3126LE 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 consumer, computing, industrial, and automotive markets.
The PI3B series targets high-speed digital interface conditioning, delivering nanosecond-grade timing precision and ultra-low power in standard logic-compatible packages for portable and embedded systems.
FAQ
What is the maximum signal frequency supported by PI3B3126LE?
The PI3B3126LE does not specify a hard frequency limit, but its 5Ω RON and 8pF COFF yield an RC time constant of ~0.04ns - supporting clean transmission of signals with rise times down to 1ns (≈350MHz fundamental). Real-world validation confirms reliable operation at USB 2.0 (480Mbps) and PCIe Gen1 (2.5GT/s) data rates.
Can PI3B3126LE be used with 1.8V logic inputs?
Yes - the device accepts rail-to-rail logic inputs from 0V to 3.6V regardless of VCC. At 1.8V input levels, VIH (2.0V min.) is not met, so the BE inputs will remain deasserted unless pulled above 2.0V. For 1.8V control, external level translation or pull-up to 3.3V is required to ensure reliable enable/disable behavior.
Is PI3B3126LE pin-compatible with PI3B3125LE?
No - PI3B3125LE uses active-LOW enables (BE0–BE3), while PI3B3126LE uses active-HIGH enables. Their pinouts are identical (14-TSSOP), but logic polarity inversion means direct substitution requires inverting the enable signals in firmware or hardware, or redesigning the control netlist.
Does PI3B3126LE require external pull-up resistors on enable pins?
Not for functionality, but recommended for robust power-up behavior. The datasheet notes that "a pull-up resistor should be provided for power-up protection" because the BE inputs float during VCC ramp-up; without pull-up, undefined enable states may cause momentary bus contention or leakage paths until firmware asserts control.
PI3B3126LE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- Bus Switch
- Circuit:
- 1 x 1:1
- Independent Circuits:
- 4
- 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:
- 14-TSSOP
PI3B3126LE FAQ
1.How can I place an order for PI3B3126LE through Aetrix?
Please submit a Request for Quotation (RFQ) for PI3B3126LE 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 PI3B3126LE reliable?
The price and inventory of PI3B3126LE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3B3126LE is usually 5 days.
3.What payment methods are accepted for PI3B3126LE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3B3126LE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI3B3126LE?
PI3B3126LE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI3B3126LE 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 PI3B3126LE?
For technical support, including PI3B3126LE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3B3126LE requirements.
6.How does Aetrix verify that PI3B3126LE is sourced from the original manufacturer or authorized distributors?
All PI3B3126LE 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 PI3B3126LE meets industry standards.
7.What is the process for return or replacement of PI3B3126LE?
All PI3B3126LE units undergo pre-shipment inspection (PSI). If there is an issue with PI3B3126LE, 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 PI3B3126LE part is unused and in its original packaging.
Return procedure for PI3B3126LE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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