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Diodes Incorporated PI3CH800LEX
- Part No.:
- PI3CH800LEX
- Manufacturer:
- Diodes Incorporated
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
PI3CH800LEX.pdf
- Description:
- IC BUS SWITCH 1 X 8:8 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,926
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Product details
Overview
PI3CH800LEX from Diodes Incorporated is an 8-bit, low-voltage bus switch with active-low enable, supporting 1.8V/2.5V/3.3V operation, 500 MHz bandwidth, 5 Ω typical on-resistance, and hot-plug capability-used for high-speed data routing in telecom backplanes and PCIe signal switching.
For engineers reviewing the PI3CH800LEX datasheet, PI3CH800LEX pinout, PI3CH800LEX application, or PI3CH800LEX equivalent, key selection criteria include rail-to-rail analog switching range (0–5 V at 3.3 V supply), sub-0.3 ns propagation delay, EN-active-low timing, 8 kV HBM ESD rating, and TSSOP-20 package compatibility with high-density PCB layouts.
Technical Context
The PI3CH800LEX implements eight independent bilateral FET switches controlled by a single active-low enable (EN) input. Each channel passes signals bidirectionally with no DC bias requirement and supports beyond-rail analog voltages up to 5 V while powered from 3.3 V.
Its architecture eliminates ground bounce and adds negligible propagation delay-only RC-limited (≤0.3 ns time constant with 10 pF load). Switching is characterized across three supply rails (1.8 V, 2.5 V, 3.3 V), with on-resistance ranging 4–25 Ω depending on voltage and current conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 500 MHz – enables full-speed USB 2.0, PCIe Gen1, and DDR2 data path switching without signal degradation |
| On-Resistance (RON) | 4–25 Ω – ensures minimal insertion loss and voltage drop across A/B ports under varying supply and load conditions |
| Propagation Delay | <0.3 ns – contributes negligible timing skew in high-speed synchronous bus applications |
| Voltage Range | 0–5 V analog swing at 3.3 V supply – supports rail-to-rail signal pass-through for mixed-voltage systems |
| ESD Rating | 8 kV HBM – provides robust handling during board-level assembly and hot-insertion events |
| Supply Voltages | 1.8 V / 2.5 V / 3.3 V – allows direct integration into low-power mobile, industrial, and computing subsystems |
| Enable Polarity | Active-low EN – simplifies interface with standard logic controllers and FPGA I/O banks |
Pinout & Package
PI3CH800LEX is packaged in a 20-pin, 173-mil-wide TSSOP (L package), with 0.65 mm pitch, surface-mount footprint, and exposed thermal pad for enhanced power dissipation in high-density designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Active-Low Enable Input | Drives all 8 channels simultaneously; logic LOW connects A0–A7 to B0–B7; HIGH places outputs in high-impedance state |
| A0–A7 (Pins 2–9) | Input/Output Port A | Bidirectional analog/digital signal terminals; tolerate up to 6 V regardless of VCC |
| GND (Pin 10) | Ground Reference | Primary return path for switch conduction and internal logic; must be low-inductance connection |
| B0–B7 (Pins 11–18) | Input/Output Port B | Complementary bidirectional terminals matched to A-side; identical voltage tolerance and RON |
| VCC (Pin 20) | Power Supply Input | Supplies internal logic and switch bias; accepts 1.8 V, 2.5 V, or 3.3 V ±10%; decoupling required near pin |
Key Features
| Feature | Design Value |
|---|---|
| Hot-Insertion Capability | Withstands 6 V transient on I/O pins during live backplane insertion without latch-up or damage |
| 500 MHz Signal Bandwidth | Preserves rise/fall times for high-speed digital protocols including USB 2.0 and LVDS |
| 0–5 V Analog Switching at 3.3 V Supply | Eliminates external level-shifting circuitry when interfacing 3.3 V logic with 5 V legacy peripherals |
| 8 kV HBM ESD Protection | Reduces need for external TVS diodes in front-end signal paths of docking stations and modular systems |
| Sub-0.3 ns Propagation Delay | Maintains timing integrity in multi-gigabit serial links where cumulative skew must remain below 100 ps |
Applications
| PCIe Gen1 Signal Routing | USB 2.0 Hub Switching |
|---|---|
Use Scenario: Dynamic reconfiguration of PCIe lanes between CPU, GPU, and expansion slots in embedded servers. IC Role / Device Role / Timing Role: Bidirectional, low-latency bus switch enabling lane multiplexing without protocol-aware logic. Use Value: Enables hardware-based lane sharing with <0.3 ns added delay and no clock domain crossing overhead. | Use Scenario: Selecting between multiple upstream USB 2.0 hosts in industrial docking stations. IC Role / Device Role / Timing Role: High-bandwidth analog switch isolating host PHYs while preserving D+/D− signal integrity. Use Value: Supports 480 Mbps signaling with <−60 dB crosstalk and 500 MHz bandwidth, avoiding packet retries. |
| Hot-Pluggable Backplane Interface | Differential LVDS Signal Multiplexing |
Use Scenario: Insertion of line cards into telecom chassis carrying +12 V backplane power and 3.3 V logic domains. IC Role / Device Role / Timing Role: I/O-tolerant switch protecting downstream logic from hot-swap transients and overvoltage. Use Value: Withstands 6 V/20 ns transients and provides 8 kV ESD protection without external clamping. | Use Scenario: Selecting between two LVDS camera sensor outputs feeding a single image processor input. IC Role / Device Role / Timing Role: Matched-pair analog switch maintaining differential impedance and skew balance. Use Value: Delivers <±0.05 ns inter-pair skew and <−60 dB off-isolation to prevent ghosting artifacts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT3245APW | 5 V only supply; higher RON (7 Ω typ); no 1.8 V support | Limited to 5 V systems; unsuitable for mixed-voltage or ultra-low-power designs | Select when legacy 5 V infrastructure dominates and bandwidth >300 MHz is sufficient |
| TS3A227EYZR | Single-supply 1.65–3.6 V; lower bandwidth (300 MHz); 3.5 Ω RON | Optimized for portable audio/data switching; lacks 5 V I/O tolerance | Prefer for battery-powered devices requiring lowest on-resistance and smallest footprint (1.4 mm × 0.9 mm DSBGA) |
Compared with SN74CBT3245APW and TS3A227EYZR, PI3CH800LEX uniquely supports 1.8 V/2.5 V/3.3 V operation with 500 MHz bandwidth and 5 V I/O tolerance-making it optimal for hot-pluggable, multi-rail telecom and computing interconnects where voltage flexibility and signal fidelity are co-critical.
Availability
PI3CH800LEX is available at Aetrix Electronics and suitable for PCIe Gen1 routing, USB 2.0 hub switching, and hot-pluggable backplane interfaces requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for PI3CH800LEX 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, high-reliability components for power management, signal integrity, and protection applications.
The PI3CH800LEX belongs to Diodes' high-speed analog switch product line, engineered specifically for low-latency, rail-to-rail signal routing in telecom infrastructure, computing backplanes, and modular system architectures.
FAQ
What supply voltage ranges does the PI3CH800LEX support?
The PI3CH800LEX operates across three nominal supply rails: 1.8 V ±10%, 2.5 V ±10%, and 3.3 V ±10%. It maintains specified on-resistance, bandwidth, and timing performance across the full industrial temperature range (–40°C to +85°C) for each voltage.
Can the PI3CH800LEX switch analog signals beyond its supply rail?
Yes. With a 3.3 V supply, it supports 0–5 V analog signal switching; with 2.5 V supply, it handles 0–3.3 V. This "beyond-rail" capability is enabled by internal FET architecture and eliminates external level shifters in mixed-voltage systems.
Is the PI3CH800LEX pin-compatible with other Diodes bus switches?
No. The PI3CH800LEX uses a unique 20-pin TSSOP layout with dedicated EN, A0–A7, B0–B7, GND, and VCC pins. It is not pin-compatible with PI3CH400 (4-bit) or PI3CH200 (2-bit) variants due to differing channel count and pin assignment.
Does the PI3CH800LEX require external pull-up or pull-down resistors on EN?
No. The EN input has CMOS-compatible thresholds and does not require external biasing. However, a pull-down resistor (e.g., 10 kΩ to GND) is recommended in floating-control scenarios to ensure predictable default high-impedance state during power-up or reset.
PI3CH800LEX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Bus Switch
- Circuit:
- 1 x 8:8
- Independent Circuits:
- 1
- Current - Output High, Low:
- -
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 1.8V, 2.5V, 3.3V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
PI3CH800LEX FAQ
1.How can I place an order for PI3CH800LEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PI3CH800LEX 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 PI3CH800LEX reliable?
The price and inventory of PI3CH800LEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3CH800LEX is usually 5 days.
3.What payment methods are accepted for PI3CH800LEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3CH800LEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI3CH800LEX?
PI3CH800LEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI3CH800LEX 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 PI3CH800LEX?
For technical support, including PI3CH800LEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3CH800LEX requirements.
6.How does Aetrix verify that PI3CH800LEX is sourced from the original manufacturer or authorized distributors?
All PI3CH800LEX 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 PI3CH800LEX meets industry standards.
7.What is the process for return or replacement of PI3CH800LEX?
All PI3CH800LEX units undergo pre-shipment inspection (PSI). If there is an issue with PI3CH800LEX, 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 PI3CH800LEX part is unused and in its original packaging.
Return procedure for PI3CH800LEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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