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Diodes Incorporated PI3B3253LEX
- Part No.:
- PI3B3253LEX
- Manufacturer:
- Diodes Incorporated
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
PI3B3253LEX.pdf
- Description:
- IC MUX/DEMUX 2 X 4:1 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
PI3B3253LEX from Diodes Incorporated is a 3.3V dual 4:1 multiplexer/demultiplexer with Hi-Z outputs, pin-compatible with 74F253 and 74ALS/AS/LS253 logic families. It features 5Ω on-resistance, 5.2ns max bus disable time, and 0.2µA typical quiescent current, enabling low-noise signal routing in notebook I/O expansion and FPGA configuration interfaces.
For engineers reviewing the PI3B3253LEX datasheet, PI3B3253LEX pinout, PI3B3253LEX application, or PI3B3253LEX equivalent, key selection criteria include propagation delay (0.25ns typ), rail-to-rail logic input tolerance (up to +3.6V), and TSSOP-16 package compatibility with legacy 74-series layouts.
Technical Context
The PI3B3253LEX implements two independent 4:1 analog/digital bus switches controlled by shared S1/S0 select lines and separate EA/EB enables. Each switch path delivers near-zero propagation delay due to its passive FET architecture-no internal logic gates or buffers are used.
Its rail-to-rail input capability allows direct interfacing with 1.8V, 2.5V, or 3.3V logic sources regardless of VCC, while the 5Ω RON ensures minimal signal attenuation and impedance matching for high-speed data paths up to 100MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply | 3.3V ±10% - defines operating voltage window for guaranteed timing and RON performance |
| RON (On-Resistance) | 5Ω typ at 0V input - ensures <50mV drop at 10mA, preserving signal integrity in low-voltage buses |
| tPLZ / tPHZ | 5.2ns max disable/enable time - supports fast reconfiguration in dynamic I/O routing applications |
| ICC Quiescent Current | 0.1µA min, 3.0µA max - enables always-on signal switching in battery-powered systems |
| CIN / COFF | 3.0pF / 8.0pF - minimizes capacitive loading on driving sources and reduces crosstalk between channels |
| Logic Input Range | –0.5V to +4.6V - permits interoperability with mixed-voltage control signals without level shifters |
Pinout & Package
PI3B3253LEX is supplied in a 16-pin TSSOP (Thin Shrink Small Outline Package) with 0.65mm pitch, 173mil body width, and exposed pad for thermal dissipation. Pin 1 is marked via notch or dot; pin numbering follows standard counter-clockwise convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 15 | EA, EB | Active-low enable inputs per mux channel - drive low to activate respective 4:1 path |
| 2, 14 | S0, S1 | Binary select inputs - determine which of four IAx/IBx inputs connects to YA/YB |
| 3–6, 10–13 | IA0–IA3, IB0–IB3 | Data inputs - bidirectional analog/digital signal terminals with 3.0pF CIN |
| 7, 9 | YA, YB | Outputs - Hi-Z when disabled; low-impedance pass-through when enabled (RON = 5Ω) |
| 8 | GND | Ground reference - must be connected before applying any signal or power |
| 16 | VCC | Power supply - decoupling capacitor required within 5mm of pin for stable switching |
Key Features
| Feature | Design Value |
|---|---|
| Near-zero propagation delay | 0.25ns typical tIY - eliminates timing skew in parallel data paths such as memory address routing |
| 5Ω analog switch RON | Ensures <1% signal loss at 10mA - critical for precision analog sensor multiplexing |
| Rail-to-rail logic inputs | Supports –0.5V to +4.6V - enables direct connection to 1.8V microcontrollers without external level translation |
| Ultra-low ICC (0.2µA typ) | Reduces standby power in portable devices - extends battery life in always-on USB-C port switching |
Applications
| Notebook I/O Expansion | FPGA Configuration Routing |
|---|---|
Use Scenario: Dynamic assignment of USB 2.0, UART, and SPI signals to multiple peripheral connectors in ultrabook docking stations. IC Role / Device Role / Timing Role: Dual 4:1 analog switch providing low-latency, bidirectional signal routing between SoC and external ports. Use Value: 5Ω RON preserves signal rise/fall times; 5.2ns disable time enables sub-10ns channel switching during hot-plug events. | Use Scenario: Selecting among four different configuration bitstreams stored in flash memory for multi-mode FPGA operation. IC Role / Device Role / Timing Role: Logic-level compatible multiplexer delivering configuration data from parallel flash to FPGA JTAG or slave parallel interface. Use Value: Rail-to-rail input tolerance accepts 3.3V flash outputs directly; Hi-Z outputs prevent back-driving during mode transitions. |
| Industrial PLC I/O Multiplexing | Automotive Infotainment Audio Switching |
Use Scenario: Consolidating eight discrete digital input channels into two MCU GPIO pins using shared select lines in compact programmable logic controllers. IC Role / Device Role / Timing Role: Dual-channel digital bus switch enabling deterministic sampling of field sensors without added propagation delay. Use Value: 0.2µA ICC supports energy harvesting designs; –40°C to +85°C rating ensures reliability in uncontrolled cabinet environments. | Use Scenario: Routing audio DAC outputs to multiple speaker zones or headphone jacks in head unit designs with space-constrained PCB layouts. IC Role / Device Role / Timing Role: Low-distortion analog multiplexer handling line-level stereo signals with minimal crosstalk. Use Value: 8.0pF COFF limits inter-channel coupling; 5Ω RON maintains flat frequency response up to 20kHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual 4:1 analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT3253PWR | Higher RON (7Ω typ), wider VCC range (2.3–3.6V), no rail-to-rail inputs | Requires level-shifting for 1.8V control logic; less suitable for mixed-voltage notebooks | Select when broader supply tolerance is needed over rail-to-rail input support |
| 74LVC253PW | CMOS logic-based (not analog switch); higher propagation delay (4.5ns), no Hi-Z output state | Cannot pass analog signals; unsuitable for audio or sensor multiplexing | Choose only for pure digital control-path demuxing where analog transparency is not required |
Compared with SN74CBT3253PWR and 74LVC253PW, PI3B3253LEX provides superior analog fidelity (5Ω RON, 3pF CIN), true Hi-Z isolation, and rail-to-rail input flexibility-making it optimal for mixed-signal I/O consolidation where signal integrity and voltage interoperability are critical.
Availability
PI3B3253LEX is available at Aetrix Electronics and suitable for notebook I/O expansion, FPGA configuration routing, industrial PLC I/O multiplexing, and automotive infotainment audio switching requiring stable component supply across extended temperature and mixed-voltage environments.
Supply support for PI3B3253LEX 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, computing, industrial, and automotive markets.
The PI3B3253LEX belongs to Diodes' NanoSwitch™ analog bus switch product line, engineered specifically for low-latency, low-power signal routing in space-constrained portable and embedded systems.
FAQ
What is the maximum signal frequency supported by PI3B3253LEX?
The PI3B3253LEX supports signals up to 100MHz in digital applications and full-audio bandwidth (20Hz–20kHz) in analog use cases. Its 5Ω RON and 3.0pF CIN yield an RC time constant under 0.25ns, ensuring minimal distortion for edge rates typical of 3.3V CMOS logic and line-level audio signals.
Can PI3B3253LEX operate with 1.8V logic control signals while VCC = 3.3V?
Yes. The logic inputs (S0, S1, EA, EB) accept rail-to-rail voltages from –0.5V to +4.6V independent of VCC. A 1.8V microcontroller can directly drive these pins without level shifters, as confirmed by the datasheet's VIH/VIL specifications and input current limits (±1µA).
Does PI3B3253LEX require external pull-up or pull-down resistors on control pins?
No. Internal weak pull-downs are not present, but the device draws only ±1µA input current and has defined VIH (≥2.0V) and VIL (≤0.8V) thresholds. External resistors are unnecessary unless noise immunity in high-EMI environments demands them-designers may add 10kΩ pull-downs to EA/EB if default Hi-Z state must be asserted at power-up.
Is PI3B3253LEX qualified for automotive applications?
No. While rated for –40°C to +85°C, PI3B3253LEX is not AEC-Q100 qualified. Diodes offers automotive-grade variants (e.g., PI3B3253QEX-A) with PPAP documentation, IATF 16949 manufacturing, and extended qualification testing-these carry distinct part numbers and packaging markings.
PI3B3253LEX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Multiplexer/Demultiplexer
- Circuit:
- 2 x 4:1
- Independent Circuits:
- 1
- Current - Output High, Low:
- -
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
PI3B3253LEX FAQ
1.How can I place an order for PI3B3253LEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PI3B3253LEX 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 PI3B3253LEX reliable?
The price and inventory of PI3B3253LEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3B3253LEX is usually 5 days.
3.What payment methods are accepted for PI3B3253LEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3B3253LEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI3B3253LEX?
PI3B3253LEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI3B3253LEX 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 PI3B3253LEX?
For technical support, including PI3B3253LEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3B3253LEX requirements.
6.How does Aetrix verify that PI3B3253LEX is sourced from the original manufacturer or authorized distributors?
All PI3B3253LEX 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 PI3B3253LEX meets industry standards.
7.What is the process for return or replacement of PI3B3253LEX?
All PI3B3253LEX units undergo pre-shipment inspection (PSI). If there is an issue with PI3B3253LEX, 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 PI3B3253LEX part is unused and in its original packaging.
Return procedure for PI3B3253LEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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