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

Diodes Incorporated PI5C34X245BEX

Name: PI5C34X245BEX
Brand: Diodes Incorporated
SKU: PI5C34X245BEX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PI5C34X245BEX

Manufacturer:: Diodes Incorporated

Category:: Signal Switches, Multiplexers, Decoders

Package:: 80-FSOP (0.154", 3.90mm Width)

Datasheet:: PI5C34X245BEX.pdf

Description:: IC BUS SWITCH 8 X 1:1 80BQSOP

Quantity:: RFQ Add To RFQ list

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Inventory:3,025

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Product details

Overview

PI5C34X245BEX from Pericom Semiconductor is a 32-bit, 2-port CMOS bus switch with four independent active-low enable inputs (BE1–BE4), 5 Ω typical on-resistance, near-zero propagation delay (0.25 ns), and ultra-low quiescent current (0.2 μA typical). It provides direct A↔B bidirectional signal routing for high-speed memory or data bus isolation in notebook and embedded computing systems.

For engineers reviewing the PI5C34X245BEX datasheet, PI5C34X245BEX pinout, PI5C34X245BEX application, or PI5C34X245BEX equivalent, key selection criteria include its 80-pin BQSOP package, industrial temperature range (–40°C to +85°C), 5V operation, and simultaneous 32-bit switching capability across four independently controlled 8-bit segments.

Technical Context

The PI5C34X245BEX implements four independent 8-bit bidirectional analog bus switches, each controlled by one BE# input. Each switch channel connects corresponding A and B pins with no logic inversion or timing skew-only RC-limited delay governed by R_ON (5–7 Ω) and load capacitance.

It operates at V_CC = 5 V ±10%, draws ≤3.0 μA ICC in quiescent state, and supports TTL-compatible control inputs (VIH ≥ 2.0 V, VIL ≤ 0.8 V). Input/output capacitance is 6 pF (off-state) and 12 pF (on-state), minimizing signal integrity impact in high-frequency data paths.

Key Specifications

Parameter	Value and Actual Design Meaning
Bus Width	32-bit, segmented into four 8-bit groups (A0–A31/B0–B31)
On-Resistance (R_ON)	5 Ω typical - enables low-loss signal pass-through without voltage drop or distortion
Propagation Delay	0.25 ns - adds negligible timing overhead vs. PCB trace delay
Quiescent Current (I_CC)	0.2 μA typical - critical for battery-powered notebook standby power budgeting
Operating Temperature	–40°C to +85°C - qualified for industrial-grade embedded deployment
Supply Voltage	5 V ±10% - compatible with standard TTL/CMOS logic rails
Input Capacitance	6 pF - minimizes loading on driving source during off-state

Pinout & Package

PI5C34X245BEX uses an 80-pin, 150-mil wide BQSOP (Package Code: B), measuring 20.4–20.6 mm × 5.8–6.2 mm × 2.0 mm height, with gull-wing leads and Pb-free/Green compliance.

Pin/Terminal	Circuit Role	Design Meaning
BEX (BE1–BE4)	Active-low bus enable input	Each controls one 8-bit segment (e.g., BE1 enables A0–A7 ↔ B0–B7); asserted LOW enables conduction
A0–A31	Port A bidirectional I/O	32-bit input/output terminal on side A; electrically identical to B pins when switch is ON
B0–B31	Port B bidirectional I/O	32-bit input/output terminal on side B; direct analog path to A pins when enabled
VCC (pins 74, 55, 69, 46)	Power supply	Four dedicated VCC pins reduce IR drop and improve noise immunity across large die
GND (pins 10, 19, 30, 39)	Ground reference	Four GND pins provide low-inductance return paths for all four switch banks
NC (pins 1, 9, 41, 80)	No-connect	Unbonded pads; must remain unconnected per datasheet to avoid parasitic coupling

Key Features

Feature	Design Value
Direct analog bus connection	Zero logic latency and no level-shifting - preserves signal integrity for DDR, PCI, or address/data buses
Ultra-low R_ON	5 Ω typical ensures <10 mV drop at 2 mA, eliminating need for buffer re-driving
Sub-microamp quiescent draw	0.2 μA typical enables always-on bus isolation without compromising system sleep current
Segmented enable architecture	Four independent BE# inputs allow selective 8-bit channel gating - reduces dynamic power and EMI
Low off-state capacitance	6 pF COFF minimizes crosstalk and signal loading when adjacent channels are active

Applications

Memory Bus Isolation

Notebook System Expansion

Use Scenario: Isolating DRAM address/data lines between CPU and memory controller during hot-plug or power-gating events.

IC Role / Device Role / Timing Role: Bidirectional analog pass gate enabling/disabling full 32-bit memory bus segments without introducing setup/hold violations.

Use Value: Prevents back-driving and contention during memory subsystem power transitions while maintaining sub-nanosecond timing alignment.

Use Scenario: Enabling/disabling peripheral expansion slots (e.g., Mini-PCIe, mSATA) in ultrabook platforms based on thermal or power policy.

IC Role / Device Role / Timing Role: Low-latency bus switch controlling 32-bit parallel interface between host controller and add-in module.

Use Value: Eliminates need for level shifters or buffers; supports instant slot disable with <5.6 ns enable-to-output response.

Industrial Control Backplane

Test Equipment Signal Routing

Use Scenario: Dynamic reconfiguration of I/O modules on modular PLC backplanes where multiple 32-bit data paths share common bus infrastructure.

IC Role / Device Role / Timing Role: Segmented bus switch allowing independent activation of up to four isolated 8-bit I/O lanes under microcontroller control.

Use Value: Enables deterministic, glitch-free bus arbitration with no added propagation delay or ground bounce noise.

Use Scenario: Automated test equipment requiring flexible routing of high-speed digital signals between DUT ports and measurement instruments.

IC Role / Device Role / Timing Role: Reconfigurable signal path selector supporting multi-DUT parallel testing via software-controlled BE# lines.

Use Value: Delivers 5 Ω impedance match and <12 pF on-state capacitance - preserves signal edge rate up to 500 MHz.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 32-bit bidirectional bus switch applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
PI3CH485BEX	8-bit, single-channel, 3.3V-only operation, 8 Ω R_ON	Limited to narrower buses; requires level translation for 5V systems	Choose when only 8-bit isolation is needed and 3.3V rail is available.
SN74CBT3245APWR	32-bit, single-enable, 5V-only, 7 Ω R_ON, higher ICC (20 μA)	Lacks segmented enable control; less granular power management	Prefer when simplified control logic outweighs need for per-segment gating.

Compared with PI3CH485BEX and SN74CBT3245APWR, the PI5C34X245BEX uniquely delivers four independent 8-bit enables, lowest quiescent current, and tightest R_ON tolerance - making it optimal for power-constrained, multi-zone bus architectures.

Availability

PI5C34X245BEX is available at Aetrix Electronics and suitable for notebook computing, industrial PLC backplanes, automated test equipment, and memory subsystem isolation requiring stable component supply and long-term lifecycle support.

Supply support for PI5C34X245BEX 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 (acquired by Diodes Incorporated in 2016) specialized in high-speed interface, timing, and signal-integrity solutions for computing and communications markets.

The PI5C34X245 belongs to Pericom's high-performance analog bus switch product line, designed specifically for low-latency, low-power bidirectional data path control in portable and industrial embedded systems.

FAQ

What is the maximum operating frequency supported by the PI5C34X245BEX?

The PI5C34X245BEX does not specify a clock frequency limit because it is an analog pass-gate device-not a synchronous logic IC. Its usable bandwidth is determined by R_ON (5 Ω) and load capacitance: for a 50 pF load, the RC time constant is ~0.25 ns, supporting clean signal transmission up to ~500 MHz with minimal edge degradation.

Can PI5C34X245BEX be used with mixed-voltage interfaces (e.g., 3.3V A-side and 5V B-side)?

No. The PI5C34X245BEX requires a single V_CC rail (5 V ±10%) and is not rated for voltage translation. Both A and B ports operate within the same V_CC-to-GND range. Applying different voltages risks latch-up or damage due to internal clamp diodes and shared substrate.

How does the four-enable architecture improve system-level power efficiency?

Each BE# input controls an independent 8-bit segment. By deactivating unused segments (e.g., disabling BE3/BE4 while using only A0–A15/B0–B15), dynamic switching current drops proportionally, and off-state leakage remains at <1 μA per disabled bank-reducing total system standby power beyond what a single-enable switch can achieve.

Is the PI5C34X245BEX pin-compatible with earlier Pericom bus switches like PI5C3257?

No. The PI5C34X245BEX uses an 80-pin BQSOP package with unique pin mapping-including four VCC/GND pairs and distributed BE# inputs-whereas PI5C3257 is a 16-pin SOIC 8-bit switch. No mechanical or electrical pin compatibility exists; board redesign is required for substitution.

PI5C34X245BEX Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 80-FSOP (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Type:: Bus Switch

Circuit:: 8 x 1:1

Independent Circuits:: 4

Current - Output High, Low:: -

Voltage Supply Source:: Single Supply

Voltage - Supply:: 4.5V ~ 5.5V

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 80-BQSOP

PI5C34X245BEX FAQ

1.How can I place an order for PI5C34X245BEX through Aetrix?

Please submit a Request for Quotation (RFQ) for PI5C34X245BEX 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 PI5C34X245BEX reliable?

The price and inventory of PI5C34X245BEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI5C34X245BEX is usually 5 days.

3.What payment methods are accepted for PI5C34X245BEX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI5C34X245BEX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PI5C34X245BEX?

PI5C34X245BEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PI5C34X245BEX 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 PI5C34X245BEX?

For technical support, including PI5C34X245BEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI5C34X245BEX requirements.

6.How does Aetrix verify that PI5C34X245BEX is sourced from the original manufacturer or authorized distributors?

All PI5C34X245BEX 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 PI5C34X245BEX meets industry standards.

7.What is the process for return or replacement of PI5C34X245BEX?

All PI5C34X245BEX units undergo pre-shipment inspection (PSI). If there is an issue with PI5C34X245BEX, 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 PI5C34X245BEX part is unused and in its original packaging.

Return procedure for PI5C34X245BEX:

1.Submit a request within 90 days.

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

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