My Inquiry
My Account
Diodes Incorporated PI3C3125WE
- Part No.:
- PI3C3125WE
- Manufacturer:
- Diodes Incorporated
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
PI3C3125WE.pdf
- Description:
- IC BUS SWITCH 1 X 1:1 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,629
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
PI3C3125WE from Diodes Incorporated is a 2.5V/3.3V, 4-bit, 2-port bus switch with individual active-low enables, featuring 5Ω ON-resistance, near-zero propagation delay (0.25 ns), and >400MHz bandwidth. It operates rail-to-rail, supports hot insertion, and is used in high-speed data routing between microcontrollers and peripheral buses in embedded computing systems.
For engineers reviewing the PI3C3125WE datasheet, PI3C3125WE pinout, PI3C3125WE application, or PI3C3125WE equivalent, key selection criteria include enable polarity (active-low), SOIC-14 package compatibility, 5V I/O tolerance, and low-capacitance switching (CIN = 3.5 pF, COFF = 5.0 pF) for signal integrity in DDR and PCIe-adjacent interconnects.
Technical Context
The PI3C3125WE implements four independent bilateral analog switches controlled by dedicated active-low BE0–BE3 inputs, each connecting A-side to B-side pins without logic inversion or level translation. Its CMOS transmission-gate architecture delivers rail-to-rail analog/digital signal pass-through with no added ground bounce or propagation delay beyond RC time constant (RON × CL).
Designed for hot-insertion compliance, it features 5V-tolerant I/Os while operating from a 2.5V supply, enabling interoperability between legacy 3.3V/5V peripherals and modern low-voltage controllers. The device maintains high-impedance isolation (IOZH ≤ ±1 µA) when disabled and exhibits minimal capacitive loading (CON = 10.0 pF) during conduction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.5V operation with 5V I/O tolerance - enables mixed-voltage system interfacing without level shifters |
| ON Resistance | 5 Ω typical - minimizes voltage drop and power loss across switched signals at up to 120mA output current |
| Bandwidth | >400 MHz - supports high-speed parallel bus applications including DDRx control lines and test access ports |
| Propagation Delay | 0.25 ns typical - contributes negligible timing skew in synchronous data paths with 50pF load |
| Input Capacitance | 3.5 pF - reduces loading on driving sources, preserving edge rate and signal fidelity |
| Enable Polarity | Active LOW (BE0–BE3) - matches standard 74LVC125 control logic for drop-in replacement in existing designs |
| Quiescent Current | 260 µA max - ensures low static power in always-on system management interfaces |
Pinout & Package
PI3C3125WE is packaged in a 14-pin SOIC (W) with 150-mil width, RoHS-compliant and green (halogen/antimony-free). Pin 1 is VCC; Pin 14 is GND. The layout follows industry-standard 74XX125 pinout for mechanical and functional compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power Supply | 2.5V core supply input; powers internal switch control logic and transmission gates |
| GND | Ground Reference | Common return path for all analog/digital signals and supply current |
| A0–A3 | Input Bus Side | Source-side signal terminals; connected directly to B0–B3 when corresponding BE is asserted |
| B0–B3 | Output Bus Side | Destination-side signal terminals; electrically continuous with A0–A3 under enable |
| BE0–BE3 | Individual Enable Inputs | Active-LOW control lines; each independently gates one A/B channel pair |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog switching | Supports full-swing digital and analog signals from GND to VCC without clipping or distortion |
| Hot-insertion capability | Prevents bus contention and backdrive damage during live card insertion via high-impedance isolation |
| Low ON-capacitance (10.0 pF) | Maintains signal rise/fall times and minimizes crosstalk in dense PCB layouts |
| 5V-tolerant I/Os | Allows direct connection to 5V peripherals while powered from 2.5V, reducing BOM count |
| Industry-standard 74XX125 pinout | Enables mechanical and schematic reuse in legacy designs without layout revision |
Applications
| PCIe Root Port Multiplexing | DDR Memory Control Bus Switching |
|---|---|
Use Scenario: Dynamic allocation of PCIe configuration space between two host processors sharing a single downstream port. IC Role / Device Role / Timing Role: Bidirectional, low-latency signal router for PERST#, CLKREQ#, and WAKE# lines with sub-nanosecond timing impact. Use Value: Eliminates need for discrete logic or FPGA-based muxing, reducing latency and board area while maintaining PCIe specification timing margins. | Use Scenario: Isolating DDR3/DDR4 command/address bus during memory training or dual-controller arbitration. IC Role / Device Role / Timing Role: High-bandwidth, low-skew bus switch enabling clean signal separation between controller and DRAM modules. Use Value: Prevents signal reflection and timing violations during bus handoff, supporting stable 1600+ MT/s operation without added termination complexity. |
| Hot-Swappable Module Backplane | Embedded Test Access Port (TAP) Routing |
Use Scenario: Enabling safe insertion/removal of compute modules in industrial rack systems without powering down the backplane. IC Role / Device Role / Timing Role: Hot-insertion compliant bus isolator for JTAG, SMBus, and GPIO lines between module and baseboard. Use Value: Guarantees zero current injection and no bus contention during plug events, meeting IEC 61000-4-2 Level 4 ESD robustness requirements. | Use Scenario: Sharing a single JTAG debugger across multiple ASICs or FPGAs on a multi-die SoM. IC Role / Device Role / Timing Role: Low-capacitance, high-isolation TCK/TMS/TDI/TDO switch with <5 pF off-state capacitance. Use Value: Preserves JTAG signal integrity at 25+ MHz clock rates, avoiding scan chain failures due to capacitive loading or crosstalk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT3125DBR | 5V-only supply (no 2.5V operation); 6Ω RON; active-low enables; same SOIC-14 pinout | Requires external level shifting for 2.5V systems; higher RON increases voltage drop at high currents | Select when legacy 5V-only design exists and 2.5V operation is unnecessary |
| PI3C3126QEX | Active-HIGH enables; QSOP-16 package; identical electrical specs otherwise | Not pin-compatible with PI3C3125WE; requires PCB redesign but offers same performance with inverted control logic | Select when system control logic natively drives active-high enables and QSOP footprint is acceptable |
Compared with SN74CBT3125DBR and PI3C3126QEX, the PI3C3125WE uniquely combines 2.5V operation, 5V I/O tolerance, and SOIC-14 pin compatibility-enabling direct upgrade paths in space-constrained, mixed-voltage embedded systems without changing layout or level-shifting circuitry.
Availability
PI3C3125WE is available at Aetrix Electronics and suitable for PCIe multiplexing, DDR bus isolation, and hot-swappable backplane designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.
Supply support for PI3C3125WE 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 PI3C3125WE belongs to Diodes' Pericom bus switch product line, engineered specifically for low-latency, high-bandwidth signal routing in next-generation embedded systems where hot insertion, mixed-voltage interoperability, and PCB space efficiency are critical.
FAQ
What is the maximum operating temperature range for PI3C3125WE?
The PI3C3125WE is specified for operation from –40°C to +85°C ambient temperature, with junction temperature limited to 125°C. This range is validated per the datasheet's Absolute Maximum Ratings and Electrical Characteristics tables, and applies across both 2.5V and 3.3V supply conditions with full functionality and parameter compliance.
Does PI3C3125WE require external pull-up resistors on its enable pins?
Yes - the datasheet specifies that a pull-up resistor must be provided on each BE pin for power-up protection, ensuring all switches remain in high-impedance state until firmware asserts the active-low enables. Typical values range from 10 kΩ to 100 kΩ, connected between BEx and VCC, to guarantee reliable startup behavior in systems without controlled reset sequencing.
Can PI3C3125WE be used to switch analog signals such as audio or sensor outputs?
Yes - its rail-to-rail analog switching capability, 5Ω RON, and low OFF-capacitance (5.0 pF) make it suitable for low-distortion analog signal routing up to ~100 MHz. However, it is not characterized for THD or SNR, so use is restricted to non-critical analog paths like bias voltage selection or sensor channel multiplexing-not high-fidelity audio or precision instrumentation.
Is PI3C3125WE pin-compatible with older Pericom PI3C3125 variants like PI3C3125LEX?
No - PI3C3125WE uses a 14-pin SOIC (W) package, while PI3C3125LEX uses a 14-pin TSSOP (L) package. Though both share identical pin functions and 74XX125 pinout order, their physical dimensions, thermal characteristics, and solder-reflow profiles differ. Mechanical compatibility requires matching footprint and land pattern to the SOIC-14 specification.
PI3C3125WE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Bus Switch
- Circuit:
- 1 x 1:1
- Independent Circuits:
- 4
- Current - Output High, Low:
- -
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 2.3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
PI3C3125WE FAQ
1.How can I place an order for PI3C3125WE through Aetrix?
Please submit a Request for Quotation (RFQ) for PI3C3125WE 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 PI3C3125WE reliable?
The price and inventory of PI3C3125WE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3C3125WE is usually 5 days.
3.What payment methods are accepted for PI3C3125WE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3C3125WE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI3C3125WE?
PI3C3125WE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI3C3125WE 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 PI3C3125WE?
For technical support, including PI3C3125WE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3C3125WE requirements.
6.How does Aetrix verify that PI3C3125WE is sourced from the original manufacturer or authorized distributors?
All PI3C3125WE 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 PI3C3125WE meets industry standards.
7.What is the process for return or replacement of PI3C3125WE?
All PI3C3125WE units undergo pre-shipment inspection (PSI). If there is an issue with PI3C3125WE, 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 PI3C3125WE part is unused and in its original packaging.
Return procedure for PI3C3125WE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PI3C3125WE Tags
-
SN74HC138DR
Texas Instruments
-
TC7SB3157CFU,LF(CT
Toshiba Semiconductor and Storage
-
74CBTLV3257PW,118
Nexperia USA Inc.
-
SN74CBTLV3257PWR
Texas Instruments
-
74CBTLV3257GUX
Nexperia USA Inc.
-
74HC154BQ,118
Nexperia USA Inc.
-
P3S0200GMX
NXP USA Inc.
-
SN74CB3Q3245PWR
Texas Instruments
-
SN74CB3Q3257RGYR
Texas Instruments
-
TCA9543APWR
Texas Instruments
-
TCA9546APWR
Texas Instruments
-
SN74HC138N
Texas Instruments
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
