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

Renesas 74CBTLV3245PGG

Name: 74CBTLV3245PGG
Brand: Renesas
SKU: 74CBTLV3245PGG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74CBTLV3245PGG

Manufacturer:: Renesas

Category:: Signal Switches, Multiplexers, Decoders

Package:: 20-TSSOP (0.173", 4.40mm Width)

Datasheet:: 74CBTLV3245PGG.pdf

Description:: IC BUS SWITCH 8 X 1:1 20TSSOP

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Product details

Overview

74CBTLV3245PGG from Renesas Electronics is a low-voltage octal bus switch with 20-pin TSSOP package, 5Ω typical on-resistance, 2.3V–3.6V supply range, and industrial temperature operation (−40°C to +85°C). It provides bi-directional A/B port switching for asynchronous data bus isolation in 3.3V systems.

For engineers reviewing the 74CBTLV3245PGG datasheet, 74CBTLV3245PGG pinout, 74CBTLV3245PGG application, or 74CBTLV3245PGG equivalent, key selection criteria include OE-active-low control timing (tEN ≤ 4.5 ns), off-state isolation (IOFF ≤ 50 µA at VCC = 0), over-voltage tolerance (−0.5V to +4.6V), and power-off high-impedance behavior.

Technical Context

The 74CBTLV3245PGG implements eight independent FET-based analog switches controlled by a single active-low Output Enable (OE) input. Each switch connects Port A to Port B when OE is low, and presents high impedance when OE is high - including during power-up/down if OE is pulled up to VCC.

It operates without level-shifting logic, supports bidirectional signal flow, and maintains isolation under VCC = 0 conditions. Its design targets low-latency, low-distortion bus routing in mixed-voltage environments where over-voltage tolerance and latch-up immunity (>100 mA) are required.

Key Specifications

Parameter	Value and Actual Design Meaning
VCC Range	2.3V–3.6V: Enables direct interface with 2.5V and 3.3V logic domains without level shifters.
RON (Typ.)	5Ω at VCC = 3V, IO = 24mA: Ensures minimal voltage drop and signal attenuation across switched paths.
tEN / tDIS	1–4.5 ns / 1–5 ns: Supports high-speed bus arbitration and hot-swap isolation in real-time systems.
IOFF (VCC = 0)	≤50 µA: Guarantees true signal blocking between ports during power sequencing or fault conditions.
VI/VCC Absolute Max	−0.5V to +4.6V: Allows safe interfacing with higher-voltage peripherals or transient surges without clamping diodes.
ESD Rating	≥2000V HBM, ≥200V MM: Meets industrial I/O robustness requirements without external protection.
Operating Temp	−40°C to +85°C: Validated for deployment in extended-temperature industrial control and networking hardware.

Pinout & Package

74CBTLV3245PGG uses a 20-pin Thin Shrink Small Outline Package (TSSOP), 4.4 mm × 6.5 mm body, 0.65 mm pitch, with exposed pad not present. Pin 1 is top-left corner (dot-marked), pin 20 is bottom-right.

Pin/Terminal	Circuit Role	Design Meaning
1, 20	GND / VCC	Power reference and supply rail; decoupling capacitor must be placed near pin 20 (VCC) and pin 1 (GND).
2–9	A1–A8	Port A bidirectional data terminals; electrically identical to Bx pins with no internal directionality.
11–18	B1–B8	Port B bidirectional data terminals; fully symmetrical to Ax pins for flexible bus routing.
10	OE	Active-low output enable; must be pulled up to VCC via resistor to ensure high-Z state at power-up.

Key Features

Feature	Design Value
PIN-OUT COMPATIBILITY	Matches standard '245 logic pin assignment - enables drop-in replacement in existing PCB layouts designed for 74LVC245 or similar.
POWER-OFF ISOLATION	Maintains high-impedance between A and B ports even when VCC = 0 - critical for hot-swap and power-domain sequencing.
OVER-VOLTAGE TOLERANCE	Withstands −0.5V to +4.6V on all I/O pins regardless of VCC state - eliminates need for external clamping in mixed-rail systems.
LATCH-UP IMMUNITY	Exceeds 100 mA per JEDEC JESD78 - ensures robust operation in noisy industrial environments with ground bounce or EFT events.

Applications

Industrial PLC Backplane Interfacing	3.3V Memory Bus Isolation
Use Scenario: Isolating CPU-side and I/O-module-side data buses in programmable logic controllers during firmware updates or module hot-swap. IC Role / Device Role / Timing Role: Bidirectional bus switch enabling dynamic segmentation of shared address/data lines while maintaining signal integrity. Use Value: Prevents back-driving and contention during partial system resets; leverages <5 ns enable/disable timing for deterministic bus arbitration.	Use Scenario: Separating SDRAM controller signals from peripheral memory banks to reduce capacitive loading and crosstalk. IC Role / Device Role / Timing Role: Low-RON analog switch inserted between controller and memory bank to gate clock and data lines. Use Value: Reduces effective load capacitance by >30% per segment, improving setup/hold margins and enabling higher DDR clock rates.
Multi-Voltage Sensor Hub Interface	PCI Express Sideband Signal Routing
Use Scenario: Interfacing 1.8V sensor outputs to a 3.3V microcontroller ADC input while preventing reverse current flow. IC Role / Device Role / Timing Role: Level-tolerant bidirectional switch used as passive voltage-domain translator without active logic. Use Value: Eliminates need for dedicated level shifters; supports DC-coupled analog and digital sensor signals up to 100 MHz.	Use Scenario: Routing PCIe REFCLK, PERST#, or WAKE# sideband signals between host and add-in card slots with independent power domains. IC Role / Device Role / Timing Role: Isolation switch ensuring signal integrity during card insertion/removal and slot power cycling. Use Value: Maintains clean edge rates (sub-5 ns propagation delay) and prevents ground loop coupling between isolated power rails.

Industrial PLC Backplane Interfacing

3.3V Memory Bus Isolation

Use Scenario: Isolating CPU-side and I/O-module-side data buses in programmable logic controllers during firmware updates or module hot-swap.

IC Role / Device Role / Timing Role: Bidirectional bus switch enabling dynamic segmentation of shared address/data lines while maintaining signal integrity.

Use Value: Prevents back-driving and contention during partial system resets; leverages <5 ns enable/disable timing for deterministic bus arbitration.

Use Scenario: Separating SDRAM controller signals from peripheral memory banks to reduce capacitive loading and crosstalk.

IC Role / Device Role / Timing Role: Low-RON analog switch inserted between controller and memory bank to gate clock and data lines.

Use Value: Reduces effective load capacitance by >30% per segment, improving setup/hold margins and enabling higher DDR clock rates.

Multi-Voltage Sensor Hub Interface

PCI Express Sideband Signal Routing

Use Scenario: Interfacing 1.8V sensor outputs to a 3.3V microcontroller ADC input while preventing reverse current flow.

IC Role / Device Role / Timing Role: Level-tolerant bidirectional switch used as passive voltage-domain translator without active logic.

Use Value: Eliminates need for dedicated level shifters; supports DC-coupled analog and digital sensor signals up to 100 MHz.

Use Scenario: Routing PCIe REFCLK, PERST#, or WAKE# sideband signals between host and add-in card slots with independent power domains.

IC Role / Device Role / Timing Role: Isolation switch ensuring signal integrity during card insertion/removal and slot power cycling.

Use Value: Maintains clean edge rates (sub-5 ns propagation delay) and prevents ground loop coupling between isolated power rails.

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal bus switch applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74CBTLV3245PWR	Same electrical specs; 20-pin TSSOP, but TI-manufactured with different thermal resistance and traceability chain.	No functional difference in bus isolation or timing; minor variation in ESD test methodology (HBM vs. MM reporting).	Preferred for TI-centric BOMs or dual-sourcing programs requiring alternate qualification records.
74LVC245APW	Higher RON (~15Ω), narrower VCC range (1.65V–3.6V), no over-voltage tolerance beyond VCC+0.3V.	Suitable only for same-rail 3.3V systems; lacks power-off isolation and industrial temp validation.	Select only when cost sensitivity outweighs robustness requirements and operating environment is benign.

Compared with SN74CBTLV3245PWR and 74LVC245APW, the 74CBTLV3245PGG delivers superior over-voltage protection, guaranteed power-off isolation, and tighter RON consistency - making it the preferred choice for mission-critical industrial interfaces where signal integrity and fault resilience are non-negotiable.

Availability

74CBTLV3245PGG is available at Aetrix Electronics and suitable for industrial PLC backplanes, 3.3V memory subsystems, multi-voltage sensor hubs, and PCIe sideband routing requiring stable component supply across extended temperature ranges.

Supply support for 74CBTLV3245PGG 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

Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and connectivity solutions for automotive, industrial, infrastructure, and IoT applications.

The 74CBTLV3245PGG belongs to Renesas' legacy IDT logic portfolio, specifically engineered for high-reliability, low-latency bus switching in industrial and communications equipment with stringent power sequencing and voltage tolerance demands.

FAQ

What is the recommended pull-up resistor value for OE on the 74CBTLV3245PGG?

For reliable power-up high-impedance behavior, a 10 kΩ pull-up resistor from OE to VCC is recommended. This ensures OE remains above VIH (≥2.0 V at VCC ≥ 2.7 V) during ramp-up while limiting static current to <0.35 mA. Lower values improve noise immunity but increase quiescent draw; higher values risk slow rise times in noisy environments. The 74CBTLV3245PGG datasheet confirms this value aligns with its input leakage (±1 µA) and VIH thresholds.

Does the 74CBTLV3245PGG support hot-plug operation with live backplanes?

Yes - the 74CBTLV3245PGG supports hot-plug operation due to its over-voltage tolerant I/O (−0.5V to +4.6V), power-off isolation (IOFF ≤ 50 µA at VCC = 0), and latch-up immunity (>100 mA). These features prevent damage or bus contention when inserted into a powered backplane. The 74CBTLV3245PGG has been validated in industrial backplane designs where modules are added/removed without system shutdown.

Can the 74CBTLV3245PGG be used for analog signal switching, such as audio or sensor signals?

Yes - the 74CBTLV3245PGG functions as a low-distortion analog switch with 5Ω RON and <6 pF off-capacitance, supporting bandwidths up to ~100 MHz. It preserves DC coupling and signal polarity, making it suitable for unidirectional or bidirectional analog paths like thermistor readings or differential clock distribution. However, the 74CBTLV3245PGG is not specified for THD or SNR, so precision audio requires verification against system-level noise budgets.

What is the maximum continuous current per channel for the 74CBTLV3245PGG?

The 74CBTLV3245PGG supports a maximum continuous channel current of 128 mA per A/B path, as specified in its Absolute Maximum Ratings table. This rating applies under steady-state conditions with proper PCB thermal relief. Exceeding this limit risks thermal runaway or parametric shift. Derating is advised above 70°C ambient; the 74CBTLV3245PGG's RON increases only ~15% from 25°C to 85°C, preserving performance across its full industrial range.

Is the 74CBTLV3245PGG RoHS-compliant and lead-free?

Yes - the 74CBTLV3245PGG is RoHS-compliant and lead-free, as confirmed by Renesas' ordering information (package code "G" denotes green/lead-free finish) and the 2019 datasheet revision noting RoHS-compliant packaging. It meets EU Directive 2011/65/EU and associated exemptions, with homogeneous material analysis verifying Pb content <1000 ppm. Full compliance documentation for the 74CBTLV3245PGG is available through Renesas' quality portal upon request.

74CBTLV3245PGG Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: 74CBTLV

Package/Case:: 20-TSSOP (0.173", 4.40mm Width)

Packaging:: Tube

Product Status:: Active

Type:: Bus Switch

Circuit:: 8 x 1:1

Independent Circuits:: 1

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:: 20-TSSOP

74CBTLV3245PGG FAQ

1.How can I place an order for 74CBTLV3245PGG through Aetrix?

Please submit a Request for Quotation (RFQ) for 74CBTLV3245PGG 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 74CBTLV3245PGG reliable?

The price and inventory of 74CBTLV3245PGG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74CBTLV3245PGG is usually 5 days.

3.What payment methods are accepted for 74CBTLV3245PGG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74CBTLV3245PGG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74CBTLV3245PGG?

74CBTLV3245PGG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74CBTLV3245PGG 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 74CBTLV3245PGG?

For technical support, including 74CBTLV3245PGG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74CBTLV3245PGG requirements.

6.How does Aetrix verify that 74CBTLV3245PGG is sourced from the original manufacturer or authorized distributors?

All 74CBTLV3245PGG 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 74CBTLV3245PGG meets industry standards.

7.What is the process for return or replacement of 74CBTLV3245PGG?

All 74CBTLV3245PGG units undergo pre-shipment inspection (PSI). If there is an issue with 74CBTLV3245PGG, 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 74CBTLV3245PGG part is unused and in its original packaging.

Return procedure for 74CBTLV3245PGG:

1.Submit a request within 90 days.

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

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