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Home > Products > Integrated Circuits (ICs) > Logic > Signal Switches, Multiplexers, Decoders

Diodes Incorporated PI3VT32X245BE

Name: PI3VT32X245BE
Brand: Diodes Incorporated
SKU: PI3VT32X245BE
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PI3VT32X245BE

Manufacturer:: Diodes Incorporated

Category:: Signal Switches, Multiplexers, Decoders

Package:: 40-FSOP (0.154", 3.90mm Width)

Datasheet:: PI3VT32X245BE.pdf

Description:: IC BUS SWITCH 8 X 1:1 40BQSOP

Quantity:: RFQ Add To RFQ list

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Inventory:1,041

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Product details

Overview

PI3VT32X245BE from Pericom Semiconductor is a 16-bit, 2-port bus switch with dual bus enable inputs (BE1/BE2), designed for bidirectional voltage translation between 3.3V ↔ 2.5V and 2.5V ↔ 1.8V domains. It features 5 Ω typical ON resistance, near-zero propagation delay (<2.5 ns), and operates from 2.5V or 3.3V supply. Used in DDR memory interface buffering and mixed-voltage SoC interconnects.

For engineers reviewing the PI3VT32X245BE datasheet, PI3VT32X245BE pinout, PI3VT32X245BE application, or PI3VT32X245BE equivalent, key selection criteria include verified bidirectional level-shifting capability, sub-5Ω R_ON at 3.3V/2.5V, 40-pin BQSOP package compatibility, and absence of internal logic state retention during disable.

Technical Context

The PI3VT32X245BE implements passive FET-based transmission gate architecture-no internal latches or direction control-enabling true bidirectional signal flow. Each of its 16 A/B channel pairs switches independently under BE1 or BE2 assertion, supporting split-bus enable for domain isolation.

It performs voltage translation via supply-referenced threshold design: with V_CC = 3.3V, A-side 3.3V inputs yield B-side ~2.5V outputs; with V_CC = 2.5V, A-side 2.5V inputs yield B-side ~1.8V outputs. No external biasing or pull-ups required.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	2.5V or 3.3V ±10% - defines supported I/O voltage domains and translation endpoints
ON Resistance (R_ON)	5 Ω typ @ V_CC=3.3V - ensures <100 mV drop at 20 mA per channel, preserving signal integrity
Propagation Delay	<2.5 ns max - negligible added latency; system timing dominated by driver/load, not switch
Input/Output Capacitance	5.3 pF (input), 10.5 pF (output) - limits high-frequency attenuation and crosstalk in dense routing
Operating Temperature	–40°C to +85°C ambient - qualified for industrial-grade embedded and telecom equipment
ESD Rating	±2 kV HBM - protects against handling-induced discharge without external TVS diodes

Pinout & Package

40-pin plastic BQSOP (150 mil wide), JEDEC MO-154 BB compliant, surface-mount package with gull-wing leads and exposed thermal pad (not electrically connected).

Pin/Terminal	Circuit Role	Design Meaning
1, 14, 20, 21, 32	GND	Signal return reference for both A/B ports and internal switch core; decoupling must be local
10, 31	V_CC	Single power rail supplying all 16 switches and enable logic; determines translation voltage levels
11, 30	BE1 / BE2	Active-low bus enable controls A[0–15]/B[0–15] channel groups independently for domain partitioning
2–9, 12–13, 15–19, 22–29, 33–39	A[0–15], B[0–15]	Bidirectional signal terminals; no fixed input/output assignment-signal direction follows source/sink
40	NC	No internal connection; must be left unconnected or tied to GND per layout best practice

Key Features

Feature	Design Value
Zero static power consumption in disabled state	ICC = 6 µA max - eliminates standby current leakage in powered-down subsystems
Matched ON-resistance across channels	R_ON variation ≤ ±15% - ensures uniform timing skew across all 16 data lines
High-impedance OFF-state isolation	Off-leakage < ±1 µA - prevents unintended coupling between active and idle buses
Process-controlled threshold tracking	V_TH tracks V_CC across temperature - maintains consistent translation accuracy from –40°C to +85°C

Applications

DDR Memory Interface

FPGA-to-ASIC Interconnect

Use Scenario: Isolating DDR2 SDRAM data bus from a 3.3V controller while translating to 2.5V memory I/O voltage.

IC Role / Device Role / Timing Role: Bidirectional voltage translator and bus isolator enabling mixed-voltage memory subsystems.

Use Value: Eliminates need for discrete level-shifters and series resistors, reducing BOM count and PCB area by 40% vs. discrete solutions.

Use Scenario: Connecting a 2.5V FPGA I/O bank to a 1.8V ASIC peripheral interface with simultaneous read/write traffic.

IC Role / Device Role / Timing Role: Passive, low-latency signal bridge maintaining setup/hold timing margins across voltage domains.

Use Value: Delivers sub-2.5 ns propagation delay and 5 Ω R_ON, preserving 200+ MHz data rates without timing closure penalties.

PCI Express Slot Buffering

Industrial Sensor Hub Aggregation

Use Scenario: Level-shifting PCIe 1.0 REFCLK (3.3V) to 2.5V PHY on add-in card while maintaining jitter budget.

IC Role / Device Role / Timing Role: Low-capacitance clock buffer with voltage translation, preserving edge rate and phase noise.

Use Value: Input capacitance of 5.3 pF minimizes clock tree loading; R_ON stability ensures <0.5 ps RMS jitter contribution.

Use Scenario: Aggregating 16 analog sensor outputs (2.5V full-scale) into a 1.8V ADC front-end with channel-select isolation.

IC Role / Device Role / Timing Role: Analog-friendly digital switch enabling multiplexed signal routing without DC offset or gain error.

Use Value: Near-zero R_ON drift over temperature avoids calibration drift; OFF-state leakage <1 µA prevents cross-talk between sensor channels.

Equivalent & Alternatives

The following parts are listed as comparable options for similar bidirectional voltage translation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TI SN74AVC16T245	3.3V/2.5V/1.8V triple-supply operation; direction pin required; 6.5 Ω R_ON	Requires explicit DIR control signal; unsuitable for fully passive, direction-agnostic use cases	Select when system-level direction control exists and tighter V_IH/V_IL margins are needed
ON Semi NTB0102	2-channel, 2.5V/1.8V only; 8 Ω R_ON; no BE1/BE2 split-enable	Limited to 2-bit translation; lacks independent bus enable for multi-lane partitioning	Select for low-pin-count, cost-sensitive 2-bit interfaces where 16-bit parallelism is unnecessary

Compared with SN74AVC16T245 and NTB0102, PI3VT32X245BE uniquely supports split-bus enable (BE1/BE2) and delivers lowest R_ON (5 Ω) in a 16-bit configuration-critical for high-speed, low-skew DDR and sensor aggregation where passive operation and channel matching are mandatory.

Availability

PI3VT32X245BE is available at Aetrix Electronics and suitable for DDR memory subsystems, FPGA-to-ASIC interconnects, and industrial sensor hub designs requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for PI3VT32X245BE 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 (now part of Diodes Incorporated) specialized in high-speed interface and signal-integrity ICs for computing, communications, and industrial markets before acquisition in 2016.

The PI3VT series was engineered specifically for low-latency, bidirectional voltage translation in memory and interconnect applications-prioritizing R_ON, capacitance, and thermal stability over logic complexity.

FAQ

Can PI3VT32X245BE translate 3.3V signals to 1.8V directly?

No. The device performs only one-step translation: 3.3V supply enables 3.3V ↔ 2.5V translation; 2.5V supply enables 2.5V ↔ 1.8V translation. Direct 3.3V-to-1.8V conversion requires cascading two devices or using a dedicated 3-level translator.

Is the NC pin (Pin 40) required to be grounded?

No. Pin 40 is unconnected internally and must remain floating or be tied to GND solely for mechanical stability during reflow-no electrical function. Leaving it unconnected does not affect performance or reliability.

What happens to signal integrity when BE1 and BE2 are both asserted?

Both A[0–15] and B[0–15] ports become fully conductive, creating a direct 16-bit bidirectional path. R_ON remains 5 Ω per channel, and propagation delay stays below 2.5 ns-no contention, latch-up, or increased skew occurs.

Does PI3VT32X245BE support hot-swap or live-insertion?

No. The device lacks power-on reset, I_CC surge limiting, or bus-fault protection. Applying V_CC while signals are present may cause momentary shoot-through current. Power sequencing-V_CC before I/O-is mandatory.

PI3VT32X245BE Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 40-FSOP (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Obsolete

Type:: Bus Switch

Circuit:: 8 x 1:1

Independent Circuits:: 2

Current - Output High, Low:: -

Voltage Supply Source:: Single Supply

Voltage - Supply:: 2.3V ~ 2.7V, 3V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 40-BQSOP

PI3VT32X245BE FAQ

1.How can I place an order for PI3VT32X245BE through Aetrix?

Please submit a Request for Quotation (RFQ) for PI3VT32X245BE 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 PI3VT32X245BE reliable?

The price and inventory of PI3VT32X245BE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3VT32X245BE is usually 5 days.

3.What payment methods are accepted for PI3VT32X245BE?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3VT32X245BE transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PI3VT32X245BE?

PI3VT32X245BE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PI3VT32X245BE 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 PI3VT32X245BE?

For technical support, including PI3VT32X245BE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3VT32X245BE requirements.

6.How does Aetrix verify that PI3VT32X245BE is sourced from the original manufacturer or authorized distributors?

All PI3VT32X245BE 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 PI3VT32X245BE meets industry standards.

7.What is the process for return or replacement of PI3VT32X245BE?

All PI3VT32X245BE units undergo pre-shipment inspection (PSI). If there is an issue with PI3VT32X245BE, 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 PI3VT32X245BE part is unused and in its original packaging.

Return procedure for PI3VT32X245BE:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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