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Diodes Incorporated PI5C3257LE
- Part No.:
- PI5C3257LE
- Manufacturer:
- Diodes Incorporated
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
PI5C3257LE.pdf
- Description:
- IC MUX/DEMUX 4 X 2:1 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,867
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Product details
Overview
PI5C3257LE from Diodes Incorporated is a quad 2:1 analog bus switch/multiplexer with three-state outputs, designed for high-speed data routing in 5V logic systems. It features 5Ω on-resistance, near-zero propagation delay (0.25ns), ultra-low quiescent current (0.2µA typical), and pinout compatibility with 74F257/74ALS257 logic families. It is used in notebook I/O expansion and memory-mapped peripheral selection.
For engineers reviewing the PI5C3257LE datasheet, PI5C3257LE pinout, PI5C3257LE application, or PI5C3257LE equivalent, key selection criteria include on-resistance matching, enable/select timing (tPZH ≤ 4.8ns), bus isolation during disable (Hi-Z output), and RoHS-compliant TSSOP-16 packaging for space-constrained PCB layouts.
Technical Context
The PI5C3257LE implements four independent bidirectional 2:1 analog switches controlled by a shared select (S) and enable (E) input. Each switch connects one of two inputs (IA/IB, etc.) to its corresponding output (YA/YB, etc.) with no level-shifting or signal conditioning-only passive FET-based conduction.
Its architecture avoids active logic gates in the signal path, eliminating propagation delay beyond RC time constant (RON × CL). The device operates strictly as a voltage-controlled analog pass gate, supporting DC to >100MHz signals when loaded with ≤50pF, and requires no external biasing or termination.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance | 5Ω typical at VCC = 4.5V, enabling low-loss signal coupling without voltage drop or heating under 48mA load |
| Propagation Delay | 0.25ns typical (In to Yn), reflecting negligible added latency beyond trace RC effects in high-speed buses |
| Quiescent Current | 0.2µA typical, allowing integration into battery-powered notebook subsystems without measurable standby drain |
| Input Capacitance | 6pF typical, minimizing capacitive loading on driving sources and preserving signal edge integrity |
| Supply Voltage Range | –0.5V to +7.0V, supporting robust operation across 5V TTL/CMOS logic rails with margin for transient overshoot |
| Output Drive Capability | ±120mA DC per channel, sufficient for direct connection to microcontroller GPIOs or ASIC I/O banks |
| Operating Temperature | –40°C to +85°C ambient, validated for industrial-grade embedded control and portable computing environments |
Pinout & Package
The PI5C3257LE is packaged in a 16-pin TSSOP (Thin Shrink Small Outline Package) with 0.65mm pitch, 5.0mm × 4.4mm body, and exposed thermal pad (per Diodes Inc. mechanical drawing 16-0061).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (S) | Bus Select Control | Active-High logic input selecting IA/IB → YA/YB path (S=L) or IA1/IB1 → YA/YB path (S=H) |
| 2 (IA0) | Data Input A Channel 0 | Bidirectional analog input/output tied to YA when S=L and E=L; high-impedance when disabled |
| 3 (IA1) | Data Input A Channel 1 | Bidirectional analog input/output tied to YA when S=H and E=L; isolated otherwise |
| 4 (IB0) | Data Input B Channel 0 | Bidirectional analog input/output tied to YB when S=L and E=L; Hi-Z when E=H |
| 5 (IB1) | Data Input B Channel 1 | Bidirectional analog input/output tied to YB when S=H and E=L; electrically disconnected when disabled |
| 6 (IC0) | Data Input C Channel 0 | Corresponds to YC output under S=L; supports independent 2:1 switching for third data pair |
| 7 (IC1) | Data Input C Channel 1 | Corresponds to YC output under S=H; shares same enable and select logic as other channels |
| 8 (ID0) | Data Input D Channel 0 | Corresponds to YD output under S=L; fully decoupled from other channels when disabled |
| 9 (ID1) | Data Input D Channel 1 | Corresponds to YD output under S=H; maintains channel independence and isolation |
| 10 (E) | Global Enable | Active-Low control disabling all four outputs simultaneously into high-impedance state |
| 11 (YA) | Data Output A | Bidirectional node connected to IA0/IA1 based on S and E states; no internal pull-up/down |
| 12 (YB) | Data Output B | Bidirectional node connected to IB0/IB1; identical electrical behavior to YA |
| 13 (YC) | Data Output C | Bidirectional node connected to IC0/IC1; matches YA/YB timing and RON specs |
| 14 (YD) | Data Output D | Bidirectional node connected to ID0/ID1; functionally identical to other outputs |
| 15 (VCC) | Positive Supply | 5V nominal power rail; must be decoupled locally with ≥0.1µF ceramic capacitor |
| 16 (GND) | Ground Reference | Signal and power return path; requires low-inductance connection to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-Low On-Resistance | 5Ω typical ensures minimal insertion loss (<0.1dB at 10MHz) and preserves signal amplitude integrity across I/O paths |
| Zero-Propagation-Delay Architecture | No active logic in signal path eliminates gate delay; total delay dominated only by RON×CL time constant |
| Three-State Output Control | Global E pin forces all outputs to Hi-Z, enabling safe bus sharing among multiple devices without contention |
| Low-Power Notebook Optimization | 0.2µA ICC typ enables use in always-on subsystems (e.g., keyboard controller, SMBus interface) without battery impact |
| Pin Compatibility with Legacy Logic | Direct replacement for 74F257/74ALS257 reduces redesign effort while upgrading analog performance and power efficiency |
Applications
| PCI Express Slot Multiplexing | Notebook Docking Station I/O Routing |
|---|---|
Use Scenario: Dynamically assigning PCIe lanes between onboard GPU and external Thunderbolt add-in card in ultrabook designs. IC Role / Device Role / Timing Role: Quad 2:1 analog switch enabling lane reconfiguration without protocol-aware logic; operates transparently at 2.5–5 GT/s. Use Value: Eliminates need for expensive retimer ICs; leverages existing 5V PCIe reference clock and maintains signal integrity via 5Ω RON and 6pF CIN. | Use Scenario: Sharing USB 2.0, UART, and I²C lines between laptop base and detachable keyboard/dock module. IC Role / Device Role / Timing Role: Bidirectional analog bus switch isolating or connecting peripheral interfaces based on mechanical docking detection. Use Value: Prevents signal contention during hot-plug events; 0.2µA quiescent current extends dock battery life during standby. |
| Industrial PLC Digital I/O Expansion | Medical Imaging Sensor Interface Multiplexing |
Use Scenario: Adding modular digital input/output cards to programmable logic controllers using shared backplane data lanes. IC Role / Device Role / Timing Role: Signal-routing switch enabling flexible assignment of 24V opto-isolated inputs to internal FPGA GPIO banks. Use Value: Supports ±7V absolute max ratings on I/O pins, tolerating industrial transients; Hi-Z disable prevents backfeeding during card hot-swap. | Use Scenario: Time-division multiplexing of analog outputs from multiple ultrasound transducer arrays into a single ADC front-end. IC Role / Device Role / Timing Role: Low-distortion analog switch selecting one of four differential sensor outputs with matched RON and CIN. Use Value: 5Ω RON matching (<±0.5Ω) across channels minimizes gain error; 0.25ns tIY ensures precise timing alignment for beamforming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad 2:1 analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT3257PW | Higher RON (7Ω typ), higher ICC (10µA), same TSSOP-16 package | Limited to commercial temp range (0°C to 70°C); lacks extended –40°C to +85°C rating | Select when cost sensitivity outweighs industrial temperature and ultra-low power requirements |
| 74LVC257PW | CMOS logic-based mux (not analog switch); 3.3V-only supply; no bidirectional capability | Only suitable for unidirectional digital logic level translation, not analog signal routing | Choose only for pure 3.3V digital bus gating where analog transparency is unnecessary |
Compared with SN74CBT3257PW and 74LVC257PW, the PI5C3257LE delivers superior analog fidelity (lower RON, lower CIN), wider temperature support, and true bidirectional operation-making it the only option for precision analog multiplexing in 5V industrial and portable systems.
Availability
PI5C3257LE is available at Aetrix Electronics and suitable for notebook I/O expansion, industrial PLC backplane routing, medical imaging sensor multiplexing, and PCIe lane switching requiring stable component supply and long-term lifecycle assurance.
Supply support for PI5C3257LE 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, industrial, and communications markets.
The PI5C3257LE belongs to Diodes' Pericom® analog switch product line, engineered specifically for low-latency, low-power signal routing in portable computing and industrial control applications where analog transparency and thermal efficiency are critical.
FAQ
What is the maximum signal frequency supported by the PI5C3257LE?
The PI5C3257LE supports analog signals up to >100MHz when driving ≤50pF loads, as confirmed by its 0.25ns propagation delay and 6pF input capacitance. Its bandwidth is limited by the RC time constant of 5Ω × 50pF = 250ps, yielding a theoretical –3dB point above 600MHz-though practical system limits depend on PCB layout and source/load impedance matching.
Can the PI5C3257LE operate with mixed-voltage I/O (e.g., 3.3V inputs with 5V VCC)?
Yes-the PI5C3257LE accepts input voltages from –0.5V to +7.0V regardless of VCC level, enabling safe interfacing between 3.3V logic and 5V supply domains. Its FET-based switch architecture does not require level translation, and the absolute maximum rating ensures robustness against overvoltage transients during mixed-rail operation.
Is the PI5C3257LE compatible with lead-free reflow soldering profiles?
Yes-the PI5C3257LE is fully RoHS 3 compliant (2015/863/EU) and qualified for standard lead-free reflow profiles, including peak temperatures up to 260°C for 30 seconds. Its TSSOP-16 package uses matte tin plating and meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), requiring no baking prior to assembly.
Does the PI5C3257LE require external pull-up or pull-down resistors on control pins?
No-control pins (S and E) have CMOS-compatible input thresholds (VIH = 2.0V min, VIL = 0.8V max at VCC = 5V) and leakage current <±1µA, allowing direct connection to microcontroller GPIOs without biasing. Internal clamping diodes (VIK = –0.7V) provide ESD protection, eliminating need for external resistors in most designs.
PI5C3257LE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Multiplexer/Demultiplexer
- Circuit:
- 4 x 2:1
- Independent Circuits:
- 1
- Current - Output High, Low:
- -
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 4.75V ~ 5.25V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
PI5C3257LE FAQ
1.How can I place an order for PI5C3257LE through Aetrix?
Please submit a Request for Quotation (RFQ) for PI5C3257LE 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 PI5C3257LE reliable?
The price and inventory of PI5C3257LE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI5C3257LE is usually 5 days.
3.What payment methods are accepted for PI5C3257LE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI5C3257LE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI5C3257LE?
PI5C3257LE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI5C3257LE 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 PI5C3257LE?
For technical support, including PI5C3257LE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI5C3257LE requirements.
6.How does Aetrix verify that PI5C3257LE is sourced from the original manufacturer or authorized distributors?
All PI5C3257LE 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 PI5C3257LE meets industry standards.
7.What is the process for return or replacement of PI5C3257LE?
All PI5C3257LE units undergo pre-shipment inspection (PSI). If there is an issue with PI5C3257LE, 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 PI5C3257LE part is unused and in its original packaging.
Return procedure for PI5C3257LE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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