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

Diodes Incorporated PI3B16244A

Name: PI3B16244A
Brand: Diodes Incorporated
SKU: PI3B16244A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PI3B16244A

Manufacturer:: Diodes Incorporated

Category:: Signal Switches, Multiplexers, Decoders

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

Datasheet:: PI3B16244A.pdf

Description:: IC BUS SWITCH 4 X 1:1 48TSSOP

Quantity:: RFQ Add To RFQ list

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Inventory:3,992

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Product details

Overview

PI3B16244A from Pericom Semiconductor is a 3.3V, 16-bit, 4-port bus switch with near-zero propagation delay (≤2.0 ns), 5 Ω on-resistance, and industrial temperature range (–40°C to +85°C). It functions as a high-speed bidirectional signal path selector in memory and peripheral interconnects, pin-compatible with 74-series 16244 drivers, and operates with 3.0V–3.6V supply.

For engineers reviewing the PI3B16244A datasheet, PI3B16244A pinout, PI3B16244A application, or PI3B16244A equivalent, key selection criteria include low on-resistance for signal integrity, TTL-compatible control inputs up to +5.5V, 48-pin TSSOP package compatibility, and zero added ground bounce in high-speed digital backplanes.

Technical Context

The PI3B16244A implements four independent 4-bit bidirectional analog switches controlled by active-low enable signals (1BE–4BE), each connecting corresponding A- and B-side buses (e.g., 1A0↔1B0) with no directionality or logic inversion. Its CMOS transmission-gate architecture ensures rail-to-rail analog/digital signal pass-through without level shifting.

All 16 data paths operate simultaneously under their respective enables, with no internal latching or timing dependencies between ports. Control inputs tolerate 0V to +5.5V regardless of VCC (3.0V–3.6V), enabling mixed-voltage system interfacing while maintaining <2.0 ns propagation delay and <0.25 ns RC time constant with 50 pF load.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	3.0V to 3.6V - Ensures stable operation in 3.3V logic domains with ±0.3V margin.
On-Resistance	5 Ω max - Minimizes voltage drop and signal distortion for 120 mA per path.
Propagation Delay	2.0 ns max - Adds negligible timing overhead in high-speed parallel bus switching.
Input Voltage Range (Control)	0V to +5.5V - Enables direct interface with 5V TTL control logic without level shifters.
Operating Temperature	–40°C to +85°C - Supports deployment in industrial and embedded environments.
Switch Capacitance	0.7 pF (on), 5.8 pF (off) - Reduces capacitive loading and crosstalk in dense PCB layouts.
Power Dissipation	0.5 W max - Allows operation without forced cooling in standard TSSOP thermal profiles.

Pinout & Package

Package: 48-pin 240-mil-wide thin plastic TSSOP (JEDEC MO-153, code "A"). Lead finish: Pb-free & Green compliant.

Pin/Terminal	Circuit Role	Design Meaning
1BE–4BE	Active-low bus enable	Each controls one 4-bit port; low = bidirectional conduction between A/B pins.
1A0–4A3, 1B0–4B3	Bidirectional switch terminals	16 pairs of matched analog/digital I/O paths; no direction pin required.
VCC (Pins 7, 18, 31, 42)	Power supply	Four distributed VCC pins reduce IR drop and improve noise immunity across 48-pin layout.
GND (Pins 4, 10, 15, 21, 34, 45)	Ground reference	Six GND pins provide low-inductance return paths for all 16 channels and control logic.

Key Features

Feature	Design Value
Near-zero propagation delay	≤2.0 ns adds no measurable timing budget penalty in 100+ MHz parallel buses.
5 Ω on-resistance	Enables ≤60 mV drop at 12 mA, preserving logic margins in 3.3V LVTTL systems.
TTL-compatible control inputs	Accepts 0V–5.5V logic levels independent of VCC, simplifying mixed-voltage board design.
No ground bounce generation	CMOS transmission-gate topology eliminates simultaneous switching noise in shared return paths.
Pb-free & Green packaging	TSSOP-A variant meets RoHS/REACH requirements without derating or thermal compromise.

Applications

Memory Interconnect

Peripheral Multiplexing

Use Scenario: Isolating multiple DDR SDRAM banks sharing a common address/data bus in FPGA-based controllers.

IC Role / Device Role / Timing Role: Bidirectional bus switch enabling time-multiplexed access without signal degradation or timing skew.

Use Value: 5 Ω R_ON and 0.7 pF off-capacitance maintain signal integrity across 16-bit wide 200 MHz buses.

Use Scenario: Sharing a single USB 2.0 transceiver between two host processors in failover-redundant systems.

IC Role / Device Role / Timing Role: High-speed analog switch routing differential D+/D− signals with sub-ns delay matching.

Use Value: Matched propagation delay (<2.0 ns) and low capacitance prevent USB eye diagram closure.

FPGA I/O Expansion

Industrial Backplane Switching

Use Scenario: Extending limited FPGA GPIO count to drive multiple sensor arrays via time-sliced addressing.

IC Role / Device Role / Timing Role: 4-port configurable switch enabling dynamic reassignment of 16 I/O lines across four sensor groups.

Use Value: Independent BE pins allow per-port activation, eliminating software-controlled multiplexer latency.

Use Scenario: Routing CAN, RS-485, and SPI signals across modular PLC slots in programmable automation controllers.

IC Role / Device Role / Timing Role: Robust 3.3V bus switch handling mixed-protocol signals with ESD-tolerant I/O structure.

Use Value: –40°C to +85°C rating and 0.5 W power dissipation support continuous operation in uncooled enclosures.

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
SN74CBT16244DGGR	Higher on-resistance (7 Ω typ), wider SSOP package (300-mil), same 3.3V operation.	Larger footprint limits high-density routing; higher R_ON increases voltage drop at >100 mA.	Preferred when legacy SSOP footprint compatibility is required over TSSOP space savings.
PI3B16244V	Identical electrical specs but packaged in 48-pin 300-mil SSOP (code "V") instead of TSSOP.	SSOP offers easier hand-soldering and higher mechanical robustness, lower thermal performance.	Select for manual assembly or vibration-prone environments where TSSOP lead reliability is a concern.

Compared with SN74CBT16244DGGR and PI3B16244V, the PI3B16244A delivers superior thermal efficiency and board-area savings in automated SMT lines, while maintaining identical functional behavior and interoperability with 74-series 16244 layouts.

Availability

PI3B16244A is available at Aetrix Electronics and suitable for memory interconnect, peripheral multiplexing, and FPGA I/O expansion requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for PI3B16244A 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 PI3B16244 belongs to Pericom's NanoSwitch™ family-designed specifically for low-latency, low-noise bus isolation in 3.3V digital systems where ground bounce and propagation delay must be eliminated.

FAQ

Can PI3B16244A operate with 5V control signals while powered at 3.3V?

Yes. The control inputs (1BE–4BE) accept 0V to +5.5V logic levels independently of VCC, which ranges from 3.0V to 3.6V. This allows direct connection to 5V TTL or LVTTL control logic without external level shifters, reducing BOM count and layout complexity in mixed-voltage systems.

What is the maximum current per switch path?

The absolute maximum DC output current per A/B pin pair is 120 mA, verified under steady-state conditions at VCC = 3.3V and TA = 25°C. Derating applies above 85°C ambient; the device remains within specification up to 120 mA at full industrial temperature range when power dissipation stays below 0.5 W.

Does PI3B16244A require external pull-up or pull-down resistors on unused control pins?

No. All control inputs (1BE–4BE) have internal weak pull-downs (typ. 100 kΩ) ensuring defined low state when floating. However, for noise immunity in high-EMI environments, tying unused enables directly to GND is recommended over leaving them open.

How does PI3B16244A handle hot-plug insertion?

Proper sequencing requires VCC and GND to be established before applying any signals to A/B or control pins. While the device tolerates input voltages up to +5.5V, hot insertion without pre-biased power rails may cause latch-up or transient overstress; use power-rail supervisors or sequencers in hot-swap designs.

PI3B16244A 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:: 4 x 1:1

Independent Circuits:: 4

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

PI3B16244A FAQ

1.How can I place an order for PI3B16244A through Aetrix?

Please submit a Request for Quotation (RFQ) for PI3B16244A 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 PI3B16244A reliable?

The price and inventory of PI3B16244A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3B16244A is usually 5 days.

3.What payment methods are accepted for PI3B16244A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3B16244A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PI3B16244A?

PI3B16244A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PI3B16244A 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 PI3B16244A?

For technical support, including PI3B16244A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3B16244A requirements.

6.How does Aetrix verify that PI3B16244A is sourced from the original manufacturer or authorized distributors?

All PI3B16244A 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 PI3B16244A meets industry standards.

7.What is the process for return or replacement of PI3B16244A?

All PI3B16244A units undergo pre-shipment inspection (PSI). If there is an issue with PI3B16244A, 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 PI3B16244A part is unused and in its original packaging.

Return procedure for PI3B16244A:

1.Submit a request within 90 days.

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

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