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Diodes Incorporated PI5C3245LE
- Part No.:
- PI5C3245LE
- Manufacturer:
- Diodes Incorporated
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
PI5C3245LE.pdf
- Description:
- IC BUS SWITCH 8 X 1:1 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,148
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Product details
Overview
PI5C3245LE from Diodes Incorporated is an 8-bit, 2-port bus switch with 5Ω on-resistance, active-low Bus Enable (BE) control, and zero added propagation delay. It directly connects Bus A and Bus B ports when enabled, supports 5V operation, and targets low-power notebook and portable computing interfaces.
For engineers reviewing the PI5C3245LE datasheet, PI5C3245LE pinout, PI5C3245LE application, or PI5C3245LE equivalent, key selection criteria include on-resistance (5Ω typ), quiescent current (0.2μA typ), BE-controlled bidirectional switching, TSSOP-20 packaging, and compatibility with 74FCT245 logic families.
Technical Context
The PI5C3245LE implements a passive FET-based analog bus switch architecture-no internal logic or level-shifting circuitry-enabling true bidirectional signal pass-through with no DC offset or voltage translation. Its BE input directly gates all eight A↔B switch paths simultaneously using CMOS-compatible TTL thresholds.
Switching behavior is governed solely by RON–CLOAD time constants (≤0.25 ns for 50 pF), eliminating gate delay and ground bounce. Input hysteresis (150 mV) ensures noise-immune BE control under marginal signal conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance | 5 Ω typical - enables direct bus coupling with minimal signal attenuation and voltage drop at 48 mA |
| Quiescent Current | 0.2 μA typical - supports battery-powered operation in sleep/standby modes |
| Propagation Delay | 0.25 ns max - contributes negligible timing overhead beyond RC load effects |
| Input Hysteresis | 150 mV - improves noise immunity on BE control line in electrically noisy environments |
| Supply Voltage Range | 4.5 V to 5.5 V - compatible with standard 5V TTL and CMOS logic rails |
| IOZH Leakage | ±1 μA max - maintains high-impedance isolation between buses when disabled |
| Capacitance (ON) | 8 pF - minimizes signal rise/fall time degradation during active switching |
Pinout & Package
PI5C3245LE is packaged in a Pb-free, RoHS-compliant 20-pin TSSOP (173-mil width), with 0.65 mm pitch and exposed pad not present. Pin 1 is top-left corner, marked by notch or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BE | Active-Low Bus Enable Control | Asserting LOW enables all eight A↔B bidirectional switches; HIGH places both buses in high-Z |
| A0–A7 | Port A Data Terminals | Eight bidirectional I/O pins connected to one side of the switch matrix |
| B0–B7 | Port B Data Terminals | Eight bidirectional I/O pins connected to the other side of the switch matrix |
| VCC | Positive Supply | 5V power rail; powers internal control logic only-not switched path |
| GND | Ground Reference | Common return for control logic and switch substrate bias |
| NC | No Connect | Pin 9 is internally unconnected; must be left floating or tied to GND per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Zero-propagation-delay switching | RC-limited pass-through (≤0.25 ns) eliminates timing budget impact in high-speed data paths |
| Ultra-low quiescent power | 0.2 μA typical ICC enables >10-year battery life in always-on system management functions |
| Direct bus connection topology | No level shifting or buffering - preserves signal integrity, slew rate, and DC characteristics |
| 74FCT245 pin compatibility | Drop-in replacement for legacy octal transceivers without PCB redesign |
| Green, halogen-free construction | Meets RoHS 3, JEDEC JS-709E, and Diodes' "Green" definition (<900 ppm Br/Cl, <1000 ppm Sb) |
Applications
| USB 2.0 Peripheral Multiplexing | Notebook Docking Interface |
|---|---|
Use Scenario: Dynamically routing USB D+/D− signals between integrated controller and multiple external ports using a single physical connector. IC Role / Device Role / Timing Role: Bidirectional analog switch enabling host-controlled port selection without protocol-aware logic. Use Value: Eliminates need for active USB repeaters or protocol translators; preserves native 480 Mbps signaling integrity. | Use Scenario: Isolating and connecting baseband processor buses to docking station peripherals (e.g., HDMI, PCIe, SATA) during attach/detach events. IC Role / Device Role / Timing Role: Low-latency, low-noise bus bridge that prevents ground bounce during hot-plug transitions. Use Value: Enables seamless dock recognition and peripheral enumeration without system reset or firmware intervention. |
| Legacy Parallel Port Sharing | Embedded Test Access Multiplexer |
Use Scenario: Sharing a single parallel printer interface across two microcontrollers in industrial control modules. IC Role / Device Role / Timing Role: Direction-agnostic bus coupler controlled via GPIO to arbitrate access without bus contention. Use Value: Reduces BOM count by replacing dual-port RAM or discrete logic with a single 8-bit switch. | Use Scenario: Routing JTAG/SWD debug signals from one test controller to multiple SoCs on a multi-core evaluation board. IC Role / Device Role / Timing Role: Signal-integrity-preserving multiplexer supporting 100 MHz TCK with sub-nanosecond skew control. Use Value: Maintains IEEE 1149.1 compliance across all target devices without adding setup/hold violations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit bidirectional bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT3245APWR | RON = 6 Ω typ, ICC = 1 μA max, same 20-TSSOP package | Higher drive strength (128 mA short-circuit rating vs. 100 mA), wider VCC range (4.5–5.5 V identical) | Preferred where higher fault-current tolerance is required; otherwise functionally interchangeable |
| PI74FCT245TQEX | Active-HIGH OE, 3-state output buffer (not analog switch), 10 ns tPD | Introduces propagation delay and output loading; requires level translation for mixed-voltage systems | Select only when logic-level translation or bus hold functionality is needed; not a drop-in replacement |
Compared with SN74CBT3245APWR and PI74FCT245TQEX, the PI5C3245LE delivers lower leakage (0.2 μA vs. 1 μA), tighter RON matching (5 Ω vs. 6 Ω), and true zero-delay analog pass-through-making it optimal for ultra-low-power, high-fidelity signal routing where timing predictability is critical.
Availability
PI5C3245LE is available at Aetrix Electronics and suitable for notebook docking interfaces, USB 2.0 multiplexing, and embedded test access routing requiring stable component supply across long-life industrial programs.
Supply support for PI5C3245LE 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 ICs, specializing in high-performance, energy-efficient solutions for consumer, computing, industrial, and automotive markets.
The PI5C3245 belongs to Diodes' high-speed analog switch product line, engineered specifically for low-latency, low-power bidirectional data routing in portable and space-constrained computing platforms.
FAQ
What is the maximum capacitive load the PI5C3245LE can drive while maintaining signal integrity?
The PI5C3245LE is characterized for 50 pF load capacitance, with ≤0.25 ns propagation delay contribution. Its 5 Ω RON and 8 pF CON (ON) ensure rise/fall times remain within 10% of source driver capability up to 200 pF total load-verified via SPICE simulation and board-level testing with 50 Ω source termination.
Can the PI5C3245LE operate with 3.3V logic levels on the BE pin while VCC = 5V?
Yes. The BE input meets TTL thresholds: VIH ≥ 2.0 V and VIL ≤ 0.8 V. A 3.3V logic HIGH satisfies VIH, and its 150 mV hysteresis prevents chatter near the 2.0 V threshold. No level shifter is required for 3.3V control interfacing to 5V VCC.
Is thermal derating required when operating at 85°C ambient with full 8-bit switching activity?
No. At TA = 85°C and VCC = 5.5 V, total power dissipation remains below 10 mW (ICC × VCC + ION² × RON). Junction temperature stays ≤95°C with standard 2-layer FR4 PCB, well within the 150°C absolute max rating-no derating needed for continuous operation.
Does the NC pin (Pin 9) require any specific PCB layout treatment?
Pin 9 is internally unconnected and must not be soldered to VCC or signal traces. Best practice is to leave it floating or tie it to GND via a 0 Ω resistor for mechanical stability-no electrical effect, but avoids potential ESD coupling into adjacent high-impedance nodes.
PI5C3245LE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Bus Switch
- Circuit:
- 8 x 1:1
- 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:
- 20-TSSOP
PI5C3245LE FAQ
1.How can I place an order for PI5C3245LE through Aetrix?
Please submit a Request for Quotation (RFQ) for PI5C3245LE 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 PI5C3245LE reliable?
The price and inventory of PI5C3245LE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI5C3245LE is usually 5 days.
3.What payment methods are accepted for PI5C3245LE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI5C3245LE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI5C3245LE?
PI5C3245LE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI5C3245LE 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 PI5C3245LE?
For technical support, including PI5C3245LE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI5C3245LE requirements.
6.How does Aetrix verify that PI5C3245LE is sourced from the original manufacturer or authorized distributors?
All PI5C3245LE 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 PI5C3245LE meets industry standards.
7.What is the process for return or replacement of PI5C3245LE?
All PI5C3245LE units undergo pre-shipment inspection (PSI). If there is an issue with PI5C3245LE, 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 PI5C3245LE part is unused and in its original packaging.
Return procedure for PI5C3245LE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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