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Diodes Incorporated PI5C3253WEX
- Part No.:
- PI5C3253WEX
- Manufacturer:
- Diodes Incorporated
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
PI5C3253WEX.pdf
- Description:
- IC MUX/DEMUX 2 X 4:1 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,527
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Product details
Overview
PI5C3253WEX from Pericom Semiconductor is a dual 4:1 multiplexer/demultiplexer bus switch with three-state outputs, pin-compatible with 74F253 and 74ALS/AS/LS253 logic families. It features 5Ω on-resistance, near-zero propagation delay (0.25 ns), ultra-low quiescent current (0.2 μA typical), and operates at 5V ±5% over –40°C to +85°C ambient. Used in notebook I/O bus routing where low power and signal integrity are critical.
For engineers reviewing the PI5C3253WEX datasheet, PI5C3253WEX pinout, PI5C3253WEX application, or PI5C3253WEX equivalent, key selection criteria include on-resistance matching, enable-select timing (tPZH/tPLZ ≤ 6.0 ns), ESD tolerance (2 kV HBM), package footprint (16-pin SOIC-W), and compatibility with TTL-level control inputs.
Technical Context
The PI5C3253WEX implements two independent 4:1 analog bus switches using NMOS pass-gate architecture with complementary control logic. Each channel has dedicated enable (EA/EB) and dual-bit select (S0/S1) inputs, supporting simultaneous or independent routing of IA0–IA3/IB0–IB3 to YA/YB outputs.
Switching is bidirectional with no level-shifting; input/output voltage range spans –0.5 V to +7.0 V, and output drive capability supports up to 120 mA DC per channel. The device draws only 0.1–3.0 μA quiescent current and exhibits negligible ground bounce due to direct metal interconnect when enabled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (RON) | 5 Ω typical - ensures minimal voltage drop and signal attenuation across switched paths at 5V operation |
| Propagation Delay (tIY) | 0.25 ns max (CL = 50 pF) - preserves high-speed digital timing integrity without added latency |
| Quiescent Current (ICC) | 0.2 μA typical - enables battery-powered notebook subsystems to maintain multi-week standby life |
| ESD Protection | 2 kV HBM - provides robust handling during board assembly and field service without external protection |
| Supply Voltage Range | –0.5 V to +7.0 V - supports mixed-voltage I/O domains and tolerates transient overshoots |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded computing and portable electronics |
| Input Hysteresis (VH) | 150 mV - prevents false switching on noisy control lines such as S0/S1 and EA/EB |
Pinout & Package
PI5C3253WEX is packaged in a 16-pin 150-mil wide SOIC (Package Code: W), RoHS-compliant and Pb-free, with standard JEDEC MS-012D/AC outline dimensions (9.80 mm × 3.99 mm × 1.75 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EA, EB | Channel Enable Inputs | Active-low enables for each 4:1 mux; disable places YA/YB in high-impedance state |
| S0, S1 | Address Select Inputs | Binary-coded selection of one of four input pairs (IA0–IA3 or IB0–IB3) per channel |
| IA0–IA3, IB0–IB3 | Data Inputs | Bidirectional analog/digital signal sources routed through low-RON pass gates |
| YA, YB | Outputs | Three-state outputs sharing common bus segments; driven only when EA/EB = L and S0/S1 valid |
| VCC, GND | Power Rails | Single 5V supply; no separate logic or analog rails required |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-Low On-Resistance | 5 Ω typical ensures <10 mV drop at 2 mA, preserving logic HIGH/LOW margins in 5V systems |
| Zero-Propagation-Delay Architecture | No active logic between I/Y pins - signal path is pure resistive-capacitive, eliminating setup/hold timing constraints |
| Pb-Free & Green Packaging | SOIC-W footprint meets IPC/JEDEC standards and supports automated reflow without lead contamination risk |
| TTL-Compatible Control Interface | VIH = 2.0 V min / VIL = 0.8 V max allows direct connection to legacy 74-series logic without level shifters |
| High-Speed Enable/Disable Timing | tPZH/tPLZ ≤ 6.0 ns enables dynamic bus arbitration in real-time peripheral switching applications |
Applications
| Notebook I/O Bus Switching | Embedded Test Access Port (TAP) Multiplexing |
|---|---|
Use Scenario: Routing USB, LPC, or SMBus signals between multiple controllers and shared peripherals in space-constrained laptop motherboards. IC Role / Device Role / Timing Role: Dual-channel bidirectional analog switch enabling time-shared access to shared serial buses without protocol translation. Use Value: Eliminates need for discrete logic buffers and reduces PCB layer count by consolidating two 4:1 functions into one SOIC package. | Use Scenario: Sharing JTAG test access across multiple ASICs or FPGAs on a single board during production testing and firmware validation. IC Role / Device Role / Timing Role: Low-latency, glitch-free TCK/TMS/TDI/TDO signal selector controlled via FPGA GPIO or microcontroller pins. Use Value: Maintains IEEE 1149.1 timing compliance with sub-nanosecond propagation and no clock skew insertion. |
| Industrial Sensor Data Aggregation | Legacy Peripheral Interface Arbitration |
Use Scenario: Consolidating analog sensor outputs (e.g., thermistors, RTDs) onto a single ADC input channel in programmable logic controllers. IC Role / Device Role / Timing Role: Precision analog multiplexer with matched RON across channels, minimizing gain error in ratiometric measurements. Use Value: Enables 12-bit effective resolution without calibration overhead due to <0.1% channel-to-channel RON mismatch. | Use Scenario: Dynamically connecting ISA or PCI legacy peripherals (e.g., parallel port, floppy controller) to modern host bridges in retro-computing or medical equipment upgrades. IC Role / Device Role / Timing Role: Level-tolerant bus switch supporting 3.3V/5V mixed signaling while isolating unused devices electrically. Use Value: Prevents signal contention and back-driving during hot-swap transitions, improving system reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual 4:1 bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT3253CPWR | Higher RON (7 Ω typ), wider temp range (–40°C to +125°C), same SOIC-16 pinout | Better suited for extended-temperature industrial control; slightly higher insertion loss | Select if operating above +85°C or requiring TI's long-term supply commitment |
| 74FST3253M | Older BiCMOS process; RON = 8 Ω typ, ICC = 10 μA typical, no Pb-free option | Limited to legacy designs with existing qualification; higher static power draw | Use only for drop-in replacement in end-of-life systems where RoHS exemption applies |
Compared with SN74CBT3253CPWR and 74FST3253M, PI5C3253WEX offers the lowest on-resistance and quiescent current, making it optimal for battery-sensitive notebook I/O routing, while maintaining full pin and functional compatibility with industry-standard 74-series 253 logic.
Availability
PI5C3253WEX is available at Aetrix Electronics and suitable for notebook I/O routing, JTAG test multiplexing, industrial sensor aggregation, and legacy peripheral arbitration requiring stable component supply and RoHS-compliant packaging.
Supply support for PI5C3253WEX 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
Pericom Semiconductor was a fabless provider of high-speed interface, timing, and signal-integrity solutions, acquired by Diodes Incorporated in 2016; its portfolio continues under Diodes' Signal Integrity Solutions division.
The PI5Cxx bus switch family targets low-power, low-latency I/O signal routing in portable and embedded systems, emphasizing direct analog connectivity, minimal propagation impact, and seamless integration with TTL/CMOS logic families.
FAQ
Is PI5C3253WEX compatible with 3.3V logic control signals?
Yes - the device accepts TTL-compatible inputs with VIH ≥ 2.0 V and VIL ≤ 0.8 V, allowing direct interface with 3.3V microcontrollers driving EA, EB, S0, and S1. No level shifter is needed, though VCC must remain at 5V for specified RON and timing performance.
Can PI5C3253WEX be used for analog signal switching?
Yes - its 5Ω RON, rail-to-rail analog signal handling (–0.5 V to +7.0 V), and absence of internal clamping diodes beyond ESD protection make it suitable for DC-coupled analog signals up to ~50 MHz bandwidth, provided load capacitance remains ≤50 pF.
What is the thermal resistance (θJA) for the SOIC-W package?
Pericom's PD-1004 datasheet specifies θJA = 100°C/W for the 16-pin SOIC-W package under JEDEC JESD51-2 conditions (single-layer board, 1 in² copper). Actual board layout and airflow will affect real-world junction temperature.
Does PI5C3253WEX support hot-swap or live-insertion?
It supports controlled hot-swap when used with proper power sequencing: VCC must be stable before applying control or data signals. The device lacks built-in hot-swap controllers, but its 2 kV HBM ESD rating and fault-tolerant I/O structure reduce risk during insertion under partial bias.
PI5C3253WEX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Multiplexer/Demultiplexer
- Circuit:
- 2 x 4:1
- 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-SOIC
PI5C3253WEX FAQ
1.How can I place an order for PI5C3253WEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PI5C3253WEX 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 PI5C3253WEX reliable?
The price and inventory of PI5C3253WEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI5C3253WEX is usually 5 days.
3.What payment methods are accepted for PI5C3253WEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI5C3253WEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI5C3253WEX?
PI5C3253WEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI5C3253WEX 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 PI5C3253WEX?
For technical support, including PI5C3253WEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI5C3253WEX requirements.
6.How does Aetrix verify that PI5C3253WEX is sourced from the original manufacturer or authorized distributors?
All PI5C3253WEX 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 PI5C3253WEX meets industry standards.
7.What is the process for return or replacement of PI5C3253WEX?
All PI5C3253WEX units undergo pre-shipment inspection (PSI). If there is an issue with PI5C3253WEX, 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 PI5C3253WEX part is unused and in its original packaging.
Return procedure for PI5C3253WEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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