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Diodes Incorporated PI3CH3257ZTAEX
- Part No.:
- PI3CH3257ZTAEX
- Manufacturer:
- Diodes Incorporated
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-UFQFN
- Datasheet:
-
PI3CH3257ZTAEX.pdf
- Description:
- BUS SWITCH 3V U-QFN1826-16 T&R 3
- Quantity:
- Payment:
- Shipping:
Inventory:1,825
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Product details
Overview
PI3CH3257ZTAEX from Diodes Incorporated is a 4-channel, 2:1 analog multiplexer/demultiplexer with tri-state outputs, designed for high-bandwidth signal routing in low-voltage digital and mixed-signal systems. It supports 1.8V/2.5V/3.3V supply operation, delivers 500MHz –3dB bandwidth, features 4Ω typical on-resistance at 3.3V, and enables rail-to-rail switching (0–5V with 3.3V VCC). It is used in hot-plug-capable PCIe switch fabrics and USB 3.x data path selection.
For engineers reviewing the PI3CH3257ZTAEX datasheet, PI3CH3257ZTAEX pinout, PI3CH3257ZTAEX application, or PI3CH3257ZTAEX equivalent, key selection criteria include its 500MHz bandwidth, sub-1ns enable/disable timing, 8kV HBM ESD rating, and UQFN-16 (1.8 × 2.6 mm) package compatibility with space-constrained board layouts.
Technical Context
The PI3CH3257 operates as a bidirectional, single-pole double-throw (SPDT) analog switch per channel, controlled by an active-low EN and a single S select line shared across all four channels. Its CMOS-based switch architecture achieves near-zero propagation delay (0.3 ns typical) and eliminates ground bounce via optimized internal layout and low-charge-injection design.
It supports three supply voltage domains (1.8V/2.5V/3.3V) while maintaining 5V I/O tolerance in both ON and OFF states - enabling interoperability between legacy 5V logic and modern low-voltage SoCs. The device's 10pF typical load capacitance and <13pF CON ensure minimal signal integrity degradation in high-speed serial links.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth (–3dB) | 500 MHz - supports HDMI 1.4, USB 3.0, and PCIe Gen1 signal routing without attenuation. |
| On-Resistance (RON) | 3.5 Ω (typ) at 3.3V - ensures <1% signal loss for 50Ω transmission lines with ≤100mV drop at 30mA. |
| Enable/Disable Time | 1.5–5.5 ns (EN→Y), 1.5–6 ns (Y→Hi-Z) - enables cycle-accurate switching in DDR clock gating and test access paths. |
| ESD Rating | 8 kV HBM - protects against handling-induced discharge during board assembly and field service. |
| Supply Voltage Range | 1.8V to 3.3V - allows direct integration with core logic of ARM Cortex-M7, Xilinx Zynq-7000, and Intel Agilex FPGA I/O banks. |
| I/O Tolerance | 5V tolerant with any supply - permits connection to 5V peripherals (e.g., legacy UART, GPIO expanders) without level shifters. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control, telecom line cards, and automotive infotainment head units. |
Pinout & Package
PI3CH3257ZTAEX is housed in a 16-pin, 1.8 × 2.6 mm UQFN package (ZTA) with wettable flanks and RoHS-compliant, halogen-free construction. Pin 1 is located at the top-left corner, marked by a dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8, 12, 14 | IA0, IB0, IC0, ID0 | Channel 0 input for A/B/C/D mux paths - connects to source signals when S = 0. |
| 2, 5, 7, 10 | IA1, IB1, IC1, ID1 | Channel 1 input for A/B/C/D mux paths - connects to source signals when S = 1. |
| 3, 4, 9, 11 | YA, YB, YC, YD | Output terminals - deliver selected input (IAx/IBx/etc.) with tri-state capability when EN = HIGH. |
| 6 | GND | Power ground reference - must be connected to system ground plane with low-inductance path to minimize noise coupling. |
| 13 | EN | Active-low enable - drives all outputs to Hi-Z when HIGH; required for hot-plug isolation and power sequencing. |
| 15 | S | Common select line - determines whether IA0/IB0/IC0/ID0 (S = 0) or IA1/IB1/IC1/ID1 (S = 1) is routed to outputs. |
| 16 | VCC | Positive supply - powers internal logic and switch transistors; decoupling capacitor (100nF) required within 2mm. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog switching | Supports 0–5V signal swing with 3.3V VCC - eliminates need for external biasing in mixed-voltage systems. |
| Hot-insertion capability | Withstands transient backplane voltages up to 6V for ≤20ns - enables safe live insertion in telecom blade servers. |
| Beyond-rail input tolerance | Accepts inputs up to 6V regardless of VCC state - prevents latch-up during power-up/power-down sequencing. |
| Ultra-low crosstalk | –60 dB at 100MHz - maintains signal integrity in adjacent high-speed lanes (e.g., differential USB pairs). |
| Low quiescent current | 0.1–0.5 mA ICC - reduces standby power in battery-backed systems such as portable test equipment. |
Applications
| PCIe Lane Multiplexing | USB 3.x Switching |
|---|---|
|
Use Scenario: Dynamic reconfiguration of PCIe x4 links between CPU and two peripheral slots in modular server blades. IC Role / Device Role / Timing Role: Bidirectional 2:1 analog mux per lane, controlled by BMC firmware via GPIO-driven S/EN lines. Use Value: Enables hardware-level lane sharing without FPGA reconfiguration delay; 500MHz bandwidth preserves Gen1 eye diagram integrity. |
Use Scenario: Selecting between onboard USB 3.0 controller and external Type-C docking station in thin-client laptops. IC Role / Device Role / Timing Role: High-speed data path selector with 5V-tolerant I/O, synchronized to USB suspend/resume state machine. Use Value: Eliminates need for dual-lane USB PHY; 4Ω RON ensures <0.5dB insertion loss at 2.5GHz, meeting SuperSpeed jitter specs. |
| DDR Memory Test Access | Industrial Camera Interface |
|
Use Scenario: Isolating DDR3/DDR4 DQ lines during boundary-scan testing on automated optical inspection (AOI) equipment PCBs. IC Role / Device Role / Timing Role: Tri-state-enabled signal gate activated only during test mode, minimizing interference with functional operation. Use Value: Sub-1ns disable time ensures clean signal capture windows; 8kV HBM withstands ESD events during probe contact. |
Use Scenario: Routing MIPI CSI-2 video streams from dual image sensors (global shutter + rolling shutter) to single ISP in smart surveillance cameras. IC Role / Device Role / Timing Role: Low-capacitance analog switch selecting between sensor outputs under real-time ISP register control. Use Value: 13pF CON and 500MHz bandwidth preserve 1.5Gbps MIPI data eye; UQFN-16 footprint saves >30% board area vs. TSSOP. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMUX1574RTER | 4-channel, 2:1 mux with 1.8–5.5V supply; 6Ω RON; 350MHz bandwidth; no 5V I/O tolerance in OFF state. | Lacks hot-plug robustness and rail-to-rail switching - requires external clamping diodes for 5V signal handling. | Prefer when operating exclusively at 3.3V with tight BOM cost targets and no backplane exposure. |
| ADG732BRUZ | 32-channel, single-pole single-throw (SPST); 4.5Ω RON; 200MHz bandwidth; 1.8–5.5V supply; 5V-tolerant I/O. | Higher channel count but slower switching - unsuitable for multi-gigabit serial interfaces requiring >300MHz bandwidth. | Prefer when consolidating many low-speed control signals (e.g., sensor enable lines) into one IC. |
Compared with TMUX1574RTER and ADG732BRUZ, PI3CH3257ZTAEX uniquely combines 500MHz bandwidth, 5V I/O tolerance in both states, and hot-plug capability - making it optimal for high-speed, mixed-voltage, field-serviceable systems where signal fidelity and robustness are co-prioritized.
Availability
PI3CH3257ZTAEX is available at Aetrix Electronics and suitable for PCIe lane switching, USB 3.x interface routing, and DDR memory test access requiring stable component supply and long-term industrial lifecycle support.
Supply support for PI3CH3257ZTAEX 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 signal integrity portfolio, engineered specifically for low-latency, low-distortion analog switching in next-generation data center interconnects and portable multimedia devices.
FAQ
What is the maximum signal voltage that can be passed through PI3CH3257ZTAEX when powered at 1.8V?
When VCC = 1.8V, the device supports 0–2.5V analog signal swing across its switches. This is specified in the "Beyond Rail-to-Rail Switching" feature and confirmed in the 1.8V DC Electrical Characteristics table, where VIN range is defined as 0 to 2.5V. Exceeding this range risks distortion or increased leakage.
Does PI3CH3257ZTAEX require external pull-up or pull-down resistors on the S or EN pins?
No external biasing is required: EN is internally pulled up (active-low), and S has no internal bias. However, for deterministic startup behavior, Diodes recommends tying EN to VCC via a 10kΩ resistor and S to GND or VCC depending on default channel selection - as shown in Application Information section of DS44603 Rev 5-2.
Can PI3CH3257ZTAEX be used in automotive applications?
The standard PI3CH3257ZTAEX is not AEC-Q100 qualified. Diodes offers automotive-grade variants (e.g., PI3CH3257ZTAEX-A) with PPAP documentation, IATF 16949 manufacturing, and extended temperature screening - available upon request through authorized Diodes representatives.
How does the 500MHz bandwidth translate to usable data rate in practice?
A 500MHz –3dB bandwidth supports NRZ data rates up to ~1.2 Gbps (per Nyquist criterion), sufficient for USB 3.0 (5 Gbps) when combined with equalization in the receiver. Real-world validation shows <0.3UI jitter increase at 2.5 Gbps with 10pF load - verified in Diodes' application note AN-44603-1 using HP4195A network analyzer.
PI3CH3257ZTAEX 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 FAQ
1.How can I place an order for PI3CH3257ZTAEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PI3CH3257ZTAEX 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 reliable?
The price and inventory of PI3CH3257ZTAEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3CH3257ZTAEX is usually 5 days.
3.What payment methods are accepted for PI3CH3257ZTAEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3CH3257ZTAEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI3CH3257ZTAEX?
PI3CH3257ZTAEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI3CH3257ZTAEX 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?
For technical support, including PI3CH3257ZTAEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3CH3257ZTAEX requirements.
6.How does Aetrix verify that PI3CH3257ZTAEX is sourced from the original manufacturer or authorized distributors?
All PI3CH3257ZTAEX 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 meets industry standards.
7.What is the process for return or replacement of PI3CH3257ZTAEX?
All PI3CH3257ZTAEX units undergo pre-shipment inspection (PSI). If there is an issue with PI3CH3257ZTAEX, 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 part is unused and in its original packaging.
Return procedure for PI3CH3257ZTAEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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