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Diodes Incorporated PI3CH3257ZTAEX-13R
- Part No.:
- PI3CH3257ZTAEX-13R
- Manufacturer:
- Diodes Incorporated
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-UFQFN
- Datasheet:
-
PI3CH3257ZTAEX-13R.pdf
- Description:
- BUS SWITCH 3V U-QFN1826-16 T&R 3
- Quantity:
- Payment:
- Shipping:
Inventory:3,488
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Product details
Overview
PI3CH3257ZTAEX-13R from Diodes Incorporated is a 4-channel, 2:1 analog multiplexer/demultiplexer with tri-state outputs, designed for high-bandwidth signal routing in 1.8V/2.5V/3.3V systems. It delivers 500MHz bandwidth, 4Ω typical on-resistance at 3.3V, and rail-to-rail switching (0–5V with 3.3V supply), enabling clean HDMI, USB 2.0, and PCIe Gen1 signal path selection in hot-plug-capable backplanes.
For engineers reviewing the PI3CH3257ZTAEX-13R datasheet, PI3CH3257ZTAEX-13R pinout, PI3CH3257ZTAEX-13R application, or PI3CH3257ZTAEX-13R equivalent, key selection criteria include enable-low logic polarity, UQFN-16 (1.8 × 2.6 mm) package compatibility, 8kV HBM ESD rating, and sub-1ns propagation delay contribution in high-speed digital interconnects.
Technical Context
The PI3CH3257 operates as a bidirectional, low-capacitance analog switch array with independent channel control via a single select line (S) and global enable (EN, active-low). Its architecture uses NMOS-only pass gates with integrated level-shifting to support input voltages beyond supply rails-enabling 0–5V signal switching even with 3.3V VCC.
Each of the four 2:1 channels features matched on-resistance (3.5–15Ω depending on supply), <3.5pF input capacitance, and –60dB crosstalk/isolation at 100MHz. The device achieves hot-insertion robustness through 5V-tolerant I/Os and internal clamp diodes rated for ±18mA, with no ground bounce or added propagation delay beyond RC time constant (~0.3ns for 10pF load).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 500MHz – supports full-rate USB 2.0 (480Mbps) and PCIe Gen1 (2.5Gbps) signal integrity without attenuation |
| On-Resistance | 3.5Ω typ. @ 3.3V – minimizes voltage drop and power loss in high-current analog/digital signal paths |
| Supply Voltage | 1.8V / 2.5V / 3.3V – enables direct integration into mixed-voltage SoC interfaces without level shifters |
| I/O Tolerance | 5V tolerant in ON/OFF states – allows safe connection to legacy 5V buses while powered from 1.8V |
| ESD Rating | 8kV HBM – meets industrial system-level ESD immunity requirements for board-level hot-swap events |
| Propagation Delay | 0.3ns typical – contributes negligible timing skew in synchronous parallel data buses |
| Operating Temp | –40°C to +85°C – qualified for industrial-grade embedded and telecom equipment deployment |
Pinout & Package
PI3CH3257ZTAEX-13R is housed in a 16-pin, 1.8 × 2.6 mm UQFN (ZTA) package with wettable flanks and RoHS-compliant, halogen-free construction. Pin 1 is located at the top-left corner per Diodes' mechanical drawing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 4, 9, 8, 12, 11 | IA0/IA1, IB0/IB1, IC0/IC1, ID0/ID1 | Eight analog input terminals-paired as two inputs per channel (A–D); bidirectional signal routing |
| 2, 5, 7, 10 | YA, YB, YC, YD | Four analog output terminals-one per channel; tri-state capable when EN = high |
| 6 | GND | Ground reference for all analog and digital circuitry; must be low-impedance for signal integrity |
| 13 | EN | Active-low global enable-drives all outputs to high-impedance when high; accepts 0–3.6V logic |
| 14 | VCC | Single positive supply (1.8V/2.5V/3.3V); powers internal logic and switch bias networks |
| 15, 16 | S | Common select line-controls 2:1 mux/demux state across all four channels (S=0→IAx/Yx; S=1→IBx/Yx) |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail switching | Supports 0–5V signals with 3.3V supply-eliminates need for external level translators in mixed-voltage systems |
| Hot-plug capability | Withstands transient overvoltage during live insertion into backplanes-critical for modular telecom/datacom chassis |
| Near-zero propagation delay | 0.3ns typical intrinsic delay-preserves timing margins in high-speed parallel bus applications like DDR address/control routing |
| Tri-state outputs | Global EN pin forces all Y outputs into high-Z-enables bus sharing and prevents contention in multi-drop configurations |
| Beyond-rail I/O tolerance | 5V-tolerant pins operate safely with VCC = 0V (power-off)-protects downstream circuitry during partial power sequencing |
Applications
| PCIe Gen1 Switching | HDMI 1.4 Signal Routing |
|---|---|
Use Scenario: Selecting between two PCIe root complex links feeding a single endpoint in a reconfigurable server mezzanine card. IC Role / Device Role / Timing Role: Bidirectional 2:1 analog mux for differential TX/RX pairs; preserves signal integrity up to 2.5Gbps with <–60dB crosstalk. Use Value: Enables dynamic link failover without retiming or protocol-aware switching-reducing BOM count vs. packet-based switches. | Use Scenario: Routing HDMI video/audio signals between dual-source GPUs to a single display controller in kiosk or digital signage hardware. IC Role / Device Role / Timing Role: High-bandwidth analog switch for TMDS clock and data lanes; maintains DC balance and edge fidelity at 225MHz pixel clock. Use Value: Avoids HDMI repeater latency and HDCP renegotiation delays-enabling seamless source switching under software control. |
| USB 2.0 Port Sharing | Industrial Backplane Interconnect |
Use Scenario: Sharing a single USB 2.0 host controller between two peripheral modules in an automated test fixture with hot-swap capability. IC Role / Device Role / Timing Role: 4-channel mux handling D+/D–, VBUS, and ID lines; supports 480Mbps signaling with <1ns skew across lanes. Use Value: Eliminates mechanical relays-improving reliability and reducing PCB footprint versus electromechanical solutions. | Use Scenario: Signal conditioning and isolation for JTAG, UART, and I²C buses routed across a 12-slot telecom backplane with live insertion. IC Role / Device Role / Timing Role: Hot-plug-safe analog switch for low-speed control buses; 8kV HBM ESD protection prevents latch-up during slot insertion. Use Value: Enables field-replaceable module upgrades without powering down the entire chassis-reducing system downtime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TS3USB30E | 3.3V-only supply; 500MHz bandwidth; 6Ω RON; no 1.8V operation | Lacks multi-supply flexibility; requires external 3.3V rail even in 1.8V systems | Choose if system uses only 3.3V and needs TI's enhanced ESD (12kV HBM) |
| SN74CBT3257PWR | Faster tPZH/tPHZ (0.5ns); higher ICC (1.5mA); 5V-only supply; no hot-plug rating | Not suitable for hot-swap or mixed-voltage backplanes; limited to 5V logic domains | Prefer for legacy 5V industrial controllers where speed outweighs power and voltage flexibility |
Compared with TS3USB30E and SN74CBT3257PWR, PI3CH3257ZTAEX-13R uniquely supports 1.8V/2.5V/3.3V operation with 5V-tolerant I/Os and verified hot-plug robustness-making it optimal for modern low-voltage, high-availability systems requiring supply scalability and live insertion.
Availability
PI3CH3257ZTAEX-13R is available at Aetrix Electronics and suitable for PCIe Gen1 switching, HDMI 1.4 routing, USB 2.0 port sharing, and industrial backplane interconnect applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for PI3CH3257ZTAEX-13R 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 analog, logic, and power management solutions for industrial, computing, and communications markets.
The PI3CH3257 belongs to Diodes' Pericom® high-speed analog switch product line, engineered specifically for low-distortion, low-latency signal routing in next-generation datacom, telecom, and consumer interface applications.
FAQ
What is the maximum signal voltage that can be passed through PI3CH3257ZTAEX-13R when powered from 1.8V?
When powered from 1.8V, the device supports 0–2.5V signal switching per its datasheet specification. This is enabled by its beyond-rail architecture, which uses internal level-shifting to maintain safe gate biasing across the full input range without damage or distortion.
Does PI3CH3257ZTAEX-13R require external pull-up or pull-down resistors on the EN or S pins?
No. The EN and S inputs have CMOS-compatible thresholds with guaranteed VIH/VIL levels across all supply voltages (e.g., VIH ≥1.2V at 1.8V supply). Internal input structures provide sufficient noise margin, eliminating need for external biasing in standard PCB layouts.
Can PI3CH3257ZTAEX-13R be used to switch differential USB 2.0 signals without degrading eye diagram integrity?
Yes. With 500MHz bandwidth, <3.5pF input capacitance, and <1ns total propagation skew, the device preserves USB 2.0 eye opening at 480Mbps. Layout best practices-matched trace lengths, controlled impedance (90Ω differential), and minimized stubs-are required to achieve full compliance.
Is the UQFN-16 (ZTA) package of PI3CH3257ZTAEX-13R compatible with standard reflow profiles for lead-free soldering?
Yes. The ZTA package is fully RoHS-compliant and qualified for JEDEC J-STD-020D MSL3 moisture sensitivity level. It supports standard Pb-free reflow profiles with peak temperature ≤260°C and time above liquidus of 60–90 seconds, as confirmed in Diodes' packaging documentation.
PI3CH3257ZTAEX-13R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 16-UFQFN
- 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-UQFN (1.8x2.6)
PI3CH3257ZTAEX-13R FAQ
1.How can I place an order for PI3CH3257ZTAEX-13R through Aetrix?
Please submit a Request for Quotation (RFQ) for PI3CH3257ZTAEX-13R 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 PI3CH3257ZTAEX-13R reliable?
The price and inventory of PI3CH3257ZTAEX-13R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3CH3257ZTAEX-13R is usually 5 days.
3.What payment methods are accepted for PI3CH3257ZTAEX-13R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3CH3257ZTAEX-13R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI3CH3257ZTAEX-13R?
PI3CH3257ZTAEX-13R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI3CH3257ZTAEX-13R 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 PI3CH3257ZTAEX-13R?
For technical support, including PI3CH3257ZTAEX-13R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3CH3257ZTAEX-13R requirements.
6.How does Aetrix verify that PI3CH3257ZTAEX-13R is sourced from the original manufacturer or authorized distributors?
All PI3CH3257ZTAEX-13R 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 PI3CH3257ZTAEX-13R meets industry standards.
7.What is the process for return or replacement of PI3CH3257ZTAEX-13R?
All PI3CH3257ZTAEX-13R units undergo pre-shipment inspection (PSI). If there is an issue with PI3CH3257ZTAEX-13R, 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 PI3CH3257ZTAEX-13R part is unused and in its original packaging.
Return procedure for PI3CH3257ZTAEX-13R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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