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Diodes Incorporated PI3CH401LE
- Part No.:
- PI3CH401LE
- Manufacturer:
- Diodes Incorporated
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
PI3CH401LE.pdf
- Description:
- IC BUS SWITCH 1 X 1:1 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,269
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Product details
Overview
PI3CH401LE from Diodes Incorporated (acquired Pericom Semiconductor) is a 4-bit, high-bandwidth bus switch with three independent enable inputs (EN0–EN2), supporting 1.8V/2.5V/3.3V supply operation, 500 MHz –3dB bandwidth, <0.3 ns propagation delay, and 5 Ω typical on-resistance. It enables hot-plug-capable signal routing in high-speed digital interconnects such as PCIe Gen1/2, USB 2.0, and LVDS data paths.
For engineers reviewing the PI3CH401LE datasheet, PI3CH401LE pinout, PI3CH401LE application, or PI3CH401LE equivalent, key selection criteria include rail-to-rail switching capability (0–5V with 3.3V VCC), 5V I/O tolerance in both ON/OFF states, industrial temperature range (–40°C to +85°C), and TSSOP-14 package compatibility for space-constrained board layouts.
Technical Context
The PI3CH401LE implements four independent analog/digital bidirectional FET switches, each controlled by one of three active-high enable signals (EN0–EN2). Each switch operates with near-zero added propagation delay and supports beyond rail-to-rail voltage translation - e.g., 0–5V signal switching under 3.3V supply, or 0–3.3V under 2.5V supply.
Its architecture delivers 500 MHz small-signal bandwidth and low crosstalk (–60 dB at 10 MHz), enabled by matched on-resistance (4–25 Ω depending on VCC and signal level) and low parasitic capacitance (CIN = 2.0 pF, CON = 7.0 pF). ESD protection meets 8 kV HBM, and latch-up immunity exceeds 200 mA per JESD17.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.8V / 2.5V / 3.3V - supports mixed-voltage system interfacing without level shifters |
| Bandwidth (–3dB) | 500 MHz - preserves signal integrity for USB 2.0 (480 Mbps), PCIe Gen1 (2.5 GT/s), and LVDS |
| On-Resistance (RON) | 4–25 Ω - ensures minimal insertion loss and impedance matching across voltage rails |
| Propagation Delay | <0.3 ns - adds negligible timing skew in high-speed parallel bus or clock distribution paths |
| I/O Tolerance | 5V tolerant in ON/OFF states - enables safe connection to legacy 5V logic while powered from lower VCC |
| Enable Control | Three independent active-high enables (EN0–EN2) - allows selective channel activation without global reset |
| Operating Temperature | –40°C to +85°C - qualified for industrial and telecom infrastructure environments |
Pinout & Package
PI3CH401LE is housed in a 14-pin TSSOP (Thin Shrink Small Outline Package), lead-free and RoHS-compliant, with 0.65 mm pitch and exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10 | EN0, EN1, EN2 | Active-high enable inputs controlling individual switch pairs - enables granular channel gating |
| 2, 5, 9, 12 | A0–A3 | Input/output port A side - bidirectional signal path connected to source-side logic or controller |
| 3, 6, 8, 11 | B0–B3 | Input/output port B side - bidirectional signal path routed to peripheral, connector, or backplane |
| 14 | VCC | Positive supply input - powers internal switch FETs and logic; accepts 1.8V/2.5V/3.3V |
| 7 | GND | Ground reference - common return for all signal and power paths; critical for noise control |
Key Features
| Feature | Design Value |
|---|---|
| Hot-Insertion Capability | Withstands 6V transient at I/O pins for ≤20 ns during live backplane mating - prevents damage in telecom/datacom hot-swap systems |
| Rail-to-Rail Switching | Switches 0–5V signals with 3.3V VCC, or 0–3.3V with 2.5V VCC - eliminates need for external level translators |
| Low Capacitance | 2.0 pF input capacitance and 7.0 pF on-state A/B capacitance - minimizes loading on high-speed drivers and receivers |
| High Off-Isolation | –60 dB off-isolation at 10 MHz - suppresses crosstalk between adjacent channels in dense routing |
| ESD Robustness | 8 kV HBM ESD rating - ensures reliability during handling and board assembly without extra protection circuitry |
Applications
| PCIe Gen1 Interposer | USB 2.0 Port Selector |
|---|---|
|
Use Scenario: Selecting between two PCIe root complexes sharing a single endpoint slot in embedded server or FPGA-based test equipment. IC Role / Device Role / Timing Role: Bidirectional, low-latency bus switch enabling dynamic reconfiguration of high-speed serial lanes without protocol reset. Use Value: Maintains signal integrity with 500 MHz bandwidth and sub-0.3 ns delay, avoiding eye diagram degradation during lane switching. |
Use Scenario: Routing USB 2.0 D+/D– signals between host controller and dual downstream ports in docking stations. IC Role / Device Role / Timing Role: High-fidelity analog switch preserving differential signaling integrity and minimizing jitter accumulation. Use Value: 5 Ω RON and 7.0 pF CON ensure <1% signal attenuation and <0.1 UI jitter addition at 480 Mbps. |
| LVDS Display Multiplexer | Hot-Swap Backplane Interface |
|
Use Scenario: Sharing a single LVDS display interface among multiple SoCs in automotive instrument cluster or medical panel designs. IC Role / Device Role / Timing Role: Low-noise, rail-to-rail analog switch supporting 0–3.3V swing with 2.5V supply and no DC bias shift. Use Value: Enables seamless display source switching without visible artifacts due to matched RON and low crosstalk (–60 dB). |
Use Scenario: Isolating add-in cards during live insertion into telecom line cards with >10V backplane transients. IC Role / Device Role / Timing Role: Transient-tolerant bus switch providing 5V I/O safety and 6V/20ns surge withstand before clamping activates. Use Value: Prevents latch-up or permanent damage during hot-plug events without requiring external TVS or current-limiting circuits. |
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 |
|---|---|---|---|
| SN74CBT3244PWR | 8-channel, 3.3V-only supply, higher RON (7 Ω typ), no 1.8V support, no 5V I/O tolerance | Limited to fixed 3.3V systems; unsuitable for mixed-voltage or hot-plug scenarios | Select when only 3.3V operation and higher channel count are required, and 5V tolerance is unnecessary |
| TS3A27518EGET | 8-channel, 1.65–3.6V supply, 0.7 Ω RON, but only 200 MHz bandwidth and no 5V I/O tolerance | Better for low-RON analog switching below 200 MHz; lacks hot-plug robustness and wide-band performance | Prefer for cost-sensitive, lower-frequency analog multiplexing where bandwidth and transient resilience are secondary |
Compared with SN74CBT3244PWR and TS3A27518EGET, the PI3CH401LE uniquely combines 500 MHz bandwidth, 5V I/O tolerance across all supply voltages, and hot-plug survivability - making it the only option for PCIe/USB 2.0 hot-swap interposers requiring rail-to-rail flexibility and industrial-grade reliability.
Availability
PI3CH401LE is available at Aetrix Electronics and suitable for PCIe Gen1 interposers, USB 2.0 docking stations, and LVDS display multiplexers requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for PI3CH401LE 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 acquired Pericom Semiconductor in 2017 and now manufactures and supports the PI3CH401LE as part of its high-speed interface portfolio, emphasizing signal integrity and interoperability in datacom and industrial systems.
This device belongs to Pericom's legacy "CH" series of high-bandwidth analog switches, designed specifically for hot-plug-capable, multi-voltage digital interconnects in telecom infrastructure, embedded computing, and test equipment.
FAQ
What is the maximum signal voltage that can be passed through PI3CH401LE when VCC = 3.3V?
When powered from 3.3V, the PI3CH401LE supports 0–5V signal switching across its A/B ports - a feature called "beyond rail-to-rail" operation. This is confirmed in the datasheet's functional description and electrical characteristics tables, enabling direct interfacing with 5V legacy peripherals without level-shifting circuitry.
Does PI3CH401LE require external pull-up resistors on enable pins?
Yes - the datasheet explicitly states: "A pull-up resistor should be provided for power-up protection." Without it, EN pins float during power-on, risking undefined switch states and potential bus contention. Typical values range from 10 kΩ to 100 kΩ to VCC, ensuring reliable HIGH default behavior at startup.
Can PI3CH401LE be used in AC-coupled differential signal paths like USB 2.0?
Yes - its bidirectional, passive-FET architecture, low 7.0 pF on-state capacitance, and matched RON (4–25 Ω) preserve differential impedance and minimize skew. Application notes confirm use in USB 2.0 D+/D– routing, provided common-mode voltage remains within 0–3.3V and termination matches 90 Ω differential.
How does PI3CH401LE handle simultaneous switching of multiple channels?
Each of the four switch channels operates independently with no shared control logic or ground bounce coupling. The datasheet confirms "no additional ground bounce noise or additional propagation delay" even during full 4-bit switching, verified by low ICC quiescent current (0.2–0.5 mA) and isolated enable inputs (EN0–EN2).
PI3CH401LE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Bus Switch
- Circuit:
- 1 x 1:1
- Independent Circuits:
- 4
- Current - Output High, Low:
- -
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 2.25V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
PI3CH401LE FAQ
1.How can I place an order for PI3CH401LE through Aetrix?
Please submit a Request for Quotation (RFQ) for PI3CH401LE 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 PI3CH401LE reliable?
The price and inventory of PI3CH401LE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3CH401LE is usually 5 days.
3.What payment methods are accepted for PI3CH401LE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3CH401LE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI3CH401LE?
PI3CH401LE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI3CH401LE 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 PI3CH401LE?
For technical support, including PI3CH401LE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3CH401LE requirements.
6.How does Aetrix verify that PI3CH401LE is sourced from the original manufacturer or authorized distributors?
All PI3CH401LE 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 PI3CH401LE meets industry standards.
7.What is the process for return or replacement of PI3CH401LE?
All PI3CH401LE units undergo pre-shipment inspection (PSI). If there is an issue with PI3CH401LE, 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 PI3CH401LE part is unused and in its original packaging.
Return procedure for PI3CH401LE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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