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

Diodes Incorporated PI3B16245A

Name: PI3B16245A
Brand: Diodes Incorporated
SKU: PI3B16245A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PI3B16245A

Manufacturer:: Diodes Incorporated

Category:: Signal Switches, Multiplexers, Decoders

Package:: 48-TFSOP (0.240", 6.10mm Width)

Datasheet:: PI3B16245A.pdf

Description:: IC BUS SWITCH 8 X 1:1 48TSSOP

Quantity:: RFQ Add To RFQ list

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Inventory:3,817

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Product details

Overview

PI3B16245A from Pericom Semiconductor is a 3.3V, 16-bit, 2-port bus switch (NanoSwitch™) with near-zero propagation delay (≤0.25 ns RC time constant), 5 Ω on-resistance, and dual active-low enable inputs (1BE, 2BE). It operates from 3.0V to 3.6V across –40°C to +85°C and replaces 74-series 16245 transceivers in hot-insertion-capable backplane and memory interface applications.

For engineers reviewing the PI3B16245A datasheet, PI3B16245A pinout, PI3B16245A application, or PI3B16245A equivalent, key selection criteria include its rail-to-rail logic-compatible control inputs, absence of added ground bounce, 4 ns max switching speed, and TSSOP-48 packaging for high-density PCB layouts.

Technical Context

The PI3B16245A implements a CMOS-based analog bus switch architecture-no latching or level-shifting-where each A/B pair connects bidirectionally via low-R_ON FETs controlled by independent /BE signals. Its logic inputs tolerate up to +5.5V regardless of V_CC, enabling mixed-voltage system interfacing.

All 16 data paths (A0–A7, B0–B7 per port) exhibit matched on-resistance (typ. 5 Ω at V_CC = 3.3V), negligible propagation delay (<0.25 ns time constant into 50 pF), and no DC current draw on A/B pins-only control inputs contribute to I_CC.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	3.0 V to 3.6 V - Ensures compatibility with 3.3V LVTTL/LVCMOS systems without level translation.
On-Resistance (R_ON)	5 Ω typ. - Minimizes voltage drop and signal distortion across bidirectional data paths.
Propagation Delay	RC-limited only (≤0.25 ns into 50 pF) - Adds no measurable delay beyond trace RC effects.
Switching Speed (t_PHL/t_PLH)	4 ns max - Supports >200 MHz data rates in point-to-point or stubbed bus topologies.
Logic Input Voltage Range	–0.5 V to +5.5 V - Allows direct interfacing with 5V controllers while powered from 3.3V.
Operating Temperature	–40°C to +85°C - Qualified for industrial-grade embedded and telecom infrastructure use.
Package	48-pin TSSOP (240-mil wide) - Enables high-density routing with 0.5 mm pitch and low profile (1.0 mm max height).

Pinout & Package

PI3B16245A is housed in a 48-pin thin shrink small-outline package (TSSOP-A), 240-mil wide, with 0.5 mm lead pitch and exposed pad optional for thermal enhancement. Pin 1 is marked by a beveled corner.

Pin/Terminal	Circuit Role	Design Meaning
1BE, 2BE	Active-low port enable	Independent control of Port 1 (A0–A7 ↔ B0–B7) and Port 2 (A0–A7 ↔ B0–B7); Hi-Z when high.
A0–A7, B0–B7 (x2)	Bidirectional data terminals	Low-capacitance (0.7 pF typ.), low-R_ON analog switches-no directionality or drive strength limitation.
V_CC (Pins 6, 17, 31, 43)	Power supply	Four dedicated V_CC pins reduce IR drop and improve noise immunity across high-speed switching.
GND (Pins 3, 9, 14, 20, 35, 46)	Ground reference	Six GND pins provide low-inductance return paths, critical for minimizing ground bounce during simultaneous switching.

Key Features

Feature	Design Value
Near-zero propagation delay	RC-limited only (≤0.25 ns into 50 pF load); preserves signal integrity in timing-critical interconnects.
5 Ω on-resistance	Ensures <1% voltage loss at 10 mA per path; maintains signal amplitude across full 3.3V swing.
Rail-to-rail logic inputs	Control pins accept –0.5 V to +5.5 V - eliminates need for external level shifters in mixed-voltage systems.
Hot-insertion support	Zero DC current on A/B pins and robust ESD protection (±2 kV HBM) enable safe live-board insertion.
Pin compatibility with 74LVC16245	Direct drop-in replacement for legacy 16-bit transceivers-no PCB redesign required.

Applications

High-Speed Backplane Interconnect

Memory Interface Isolation

Use Scenario: Isolating CPU and FPGA memory controllers from shared DDR2/DDR3 address/data buses during debug or configuration.

IC Role / Device Role / Timing Role: Bidirectional analog switch enabling dynamic bus partitioning without adding skew or jitter.

Use Value: Eliminates timing uncertainty introduced by traditional transceivers; supports sub-nanosecond setup/hold margins.

Use Scenario: Segregating boot ROM and flash memory access paths in multi-core SoC reference designs.

IC Role / Device Role / Timing Role: Low-R_ON pass-gate isolating memory read/write cycles between master and slave domains.

Use Value: Prevents contention-induced corruption during power sequencing; enables independent V_CC ramp-up.

Hot-Pluggable Module Interface

PCI/PCIe Slot Signal Multiplexing

Use Scenario: Enabling live insertion of mezzanine cards into carrier boards in telecom line cards.

IC Role / Device Role / Timing Role: Bus switch decoupling module-side signals from backplane until power and reset stabilize.

Use Value: Meets IEEE 1101.10 hot-swap requirements; suppresses ground bounce during insertion transients.

Use Scenario: Sharing PCIe lanes between two host processors in failover server architectures.

IC Role / Device Role / Timing Role: Low-latency, bidirectional lane steering without protocol-aware logic.

Use Value: Maintains PCIe Gen2 signal integrity (≤1.5 dB insertion loss at 2.5 GHz) due to minimal R_ON/C_IN.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit bus switch applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC16245A	3-state transceiver (not analog switch); requires direction control; 3.3V-only logic; 6.5 ns propagation delay.	Used where bus directionality is fixed and level-shifting is unnecessary; not suitable for hot-swap or zero-delay paths.	Select when direction control is available and propagation delay tolerance exceeds 4 ns.
PI3CH485E	8-bit, single-port, 3.3V bus switch; 4.5 Ω R_ON; same NanoSwitch™ architecture but half the width and different pinout.	Applicable in space-constrained 8-bit interfaces (e.g., I²C expansion, sensor hub isolation); not pin-compatible.	Select when channel count is reduced and board area is prioritized over 16-bit parallel throughput.

Compared with SN74LVC16245A and PI3CH485E, the PI3B16245A uniquely delivers 16-bit, dual-port, zero-delay switching in a single TSSOP-48 package-enabling hot-plug-capable, mixed-voltage backplane segmentation without direction logic or added latency.

Availability

PI3B16245A is available at Aetrix Electronics and suitable for high-speed backplane interconnect, memory interface isolation, and hot-pluggable module interface applications requiring stable component supply and long-term industrial lifecycle support.

Supply support for PI3B16245A 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 solutions for computing, communications, and industrial electronics before its 2016 acquisition.

The PI3B16245A belongs to Pericom's NanoSwitch™ family-designed specifically for zero-delay, low-R_ON, hot-insertion-capable bus isolation in 3.3V system interconnects.

FAQ

Can PI3B16245A operate with V_CC = 2.5V?

No. The device is specified only for 3.0V to 3.6V operation. At 2.5V, R_ON increases significantly (>15 Ω), propagation delay degrades, and logic input thresholds become unreliable. Operation outside this range violates Absolute Maximum Ratings and may cause latch-up or permanent damage.

Does PI3B16245A require external pull-up or pull-down resistors on A/B pins?

No. The A and B terminals are passive analog nodes with no internal termination. External biasing is only needed if the connected circuitry demands defined idle states-e.g., pull-downs on B-side lines to prevent floating during 1BE/2BE high (Hi-Z) condition.

What is the maximum capacitive load supported per A/B pin?

Each A/B pin drives ≤0.7 pF typical capacitance. With 5 Ω R_ON, the RC time constant remains ≤0.35 ns into 70 pF total load (including PCB trace and receiver input). For reliable 200 MHz operation, keep total load ≤50 pF per path as characterized in the datasheet.

Is PI3B16245A RoHS-compliant and halogen-free?

Yes. The PI3B16245A (suffix 'A') and PI3B16245AE (suffix 'AE') variants are both Pb-free and Green-compliant per JEDEC JS709B and IPC-1752A, with halogen content <900 ppm chlorine + bromine and <1500 ppm total halogens.

PI3B16245A Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 48-TFSOP (0.240", 6.10mm 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:: 3V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 48-TSSOP

PI3B16245A FAQ

1.How can I place an order for PI3B16245A through Aetrix?

Please submit a Request for Quotation (RFQ) for PI3B16245A 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 PI3B16245A reliable?

The price and inventory of PI3B16245A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3B16245A is usually 5 days.

3.What payment methods are accepted for PI3B16245A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3B16245A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PI3B16245A?

PI3B16245A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PI3B16245A 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 PI3B16245A?

For technical support, including PI3B16245A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3B16245A requirements.

6.How does Aetrix verify that PI3B16245A is sourced from the original manufacturer or authorized distributors?

All PI3B16245A 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 PI3B16245A meets industry standards.

7.What is the process for return or replacement of PI3B16245A?

All PI3B16245A units undergo pre-shipment inspection (PSI). If there is an issue with PI3B16245A, 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 PI3B16245A part is unused and in its original packaging.

Return procedure for PI3B16245A:

1.Submit a request within 90 days.

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

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