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

Renesas 74CBTLV16245PAG8

Name: 74CBTLV16245PAG8
Brand: Renesas
SKU: 74CBTLV16245PAG8
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74CBTLV16245PAG8

Manufacturer:: Renesas

Category:: Signal Switches, Multiplexers, Decoders

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

Datasheet:: 74CBTLV16245PAG8.pdf

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

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Product details

Overview

74CBTLV16245PAG8 from Renesas Electronics is a low-voltage 16-bit bus switch IC organized as dual 8-bit bidirectional switches with independent active-low Output Enable (1OE, 2OE) control. It features 5Ω typical on-resistance, operates from 2.3V to 3.6V, supports industrial temperature range (–40°C to +85°C), and provides isolation under power-off conditions. It is used for high-speed 3.3V bus switching and isolation in memory expansion and peripheral interface subsystems.

For engineers reviewing the 74CBTLV16245PAG8 datasheet, 74CBTLV16245PAG8 pinout, 74CBTLV16245PAG8 application, or 74CBTLV16245PAG8 equivalent, key selection criteria include bidirectional R_ON ≤ 8Ω at 3.3V, V_CC-tolerant I/O up to 4.6V, OE-controlled high-impedance state, and TSSOP-48 package compatibility with legacy 16245 footprint layouts.

Technical Context

The 74CBTLV16245PAG8 implements two independent 8-bit LVTTL-compatible bus switches, each controlled by its own active-low OE input. Its CMOS transmission-gate architecture enables true bidirectional signal flow with sub-0.25ns propagation delay and nanosecond-scale enable/disable timing.

Each switch channel exhibits low on-resistance (5Ω typ. at V_CC = 3.3V, I_O = 24mA), overvoltage tolerance (±0.5V beyond V_CC), and guaranteed isolation (I_OFF ≤ 10µA at V_CC = 0V), making it suitable for hot-swap and partial-power-down scenarios in multi-rail systems.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2.3V to 3.6V - supports core logic supply rails in modern 3.3V digital systems without level-shifting.
R_ON (Typ.)	5Ω at V_CC = 3.3V, I_O = 24mA - ensures minimal voltage drop and signal distortion for high-speed data buses.
t_PD	0.15–0.25ns - enables operation in >1GHz clock domains with negligible timing skew between A/B ports.
I_OFF	≤10µA at V_CC = 0V - guarantees robust isolation during system power sequencing or standby modes.
ESD Rating	>2000V HBM, >200V MM - meets industrial-grade robustness requirements without external protection.
Operating Temp	–40°C to +85°C - qualified for use in industrial control, networking, and embedded computing environments.
Input Clamp	V_IK ≥ –1.2V - protects against negative transients on I/O lines during hot insertion or fault conditions.

Pinout & Package

74CBTLV16245PAG8 is housed in a 48-pin Thin Shrink Small Outline Package (TSSOP), designated PAG48, with 0.5mm pitch and exposed pad not present. Pin assignment follows standard 16245 layout for drop-in compatibility with legacy designs.

Pin/Terminal	Circuit Role	Design Meaning
1OE, 2OE	Active-low Output Enable	Controls respective 8-bit switch bank; high = high-Z isolation, low = bidirectional conduction path.
1A1–1A8, 2A1–2A8	Port A I/O	First and second 8-bit bidirectional data terminals; electrically identical to Port B pins.
1B1–1B8, 2B1–2B8	Port B I/O	Corresponding 8-bit bidirectional data terminals; fully symmetrical with Port A.
V_CC, GND	Power Supply	Two V_CC and three GND pins distributed across package for low-impedance supply routing and noise reduction.
NC	No Connect	Four unconnected pins (pins 4, 9, 10, 33) - must remain unpopulated and unconnected per design.

Key Features

Feature	Design Value
Bidirectional Low-R_ON Switching	5Ω typical on-resistance enables lossless signal transfer in both directions without direction control logic.
Power-Off Isolation	Guaranteed I_OFF ≤ 10µA when V_CC = 0V - prevents back-driving and leakage between powered/unpowered subsystems.
Overvoltage Tolerance	I/O pins withstand –0.5V to 4.6V regardless of V_CC state - eliminates need for external clamping diodes in mixed-voltage interfaces.
LVTTL-Compatible Control	V_IL ≤ 0.8V and V_IH ≥ 2.0V at V_CC = 3.6V - ensures reliable interfacing with standard 3.3V logic families.
Industrial Temperature Operation	Specified performance across –40°C to +85°C - validated for deployment in factory automation and outdoor telecom equipment.

Applications

Memory Expansion Interface	PCI/PCIe Slot Isolation
Use Scenario: Adding SRAM or Flash memory banks to microcontroller-based industrial controllers while maintaining signal integrity across address/data buses. IC Role / Device Role / Timing Role: Bidirectional bus switch enabling dynamic connection/disconnection of memory banks under firmware control via OE signals. Use Value: Eliminates contention during memory remapping and reduces capacitive loading on shared buses, preserving setup/hold timing margins.	Use Scenario: Isolating add-in cards from host motherboard during hot-plug events in ruggedized embedded computing platforms. IC Role / Device Role / Timing Role: High-speed bus isolator placed between PCIe slot edge connector and host controller, activated only during card enumeration. Use Value: Prevents back-powering of unpowered cards and suppresses ground bounce during insertion/removal sequences.
Multi-Processor Interconnect	Legacy Peripheral Bridging
Use Scenario: Sharing a common data bus between two ARM Cortex-M7 cores operating at different power states in safety-critical avionics modules. IC Role / Device Role / Timing Role: Dual-bank switch providing independent enable control for each processor's bus segment to prevent arbitration conflicts. Use Value: Enables deterministic bus access scheduling and eliminates metastability risk during asymmetric wake-up sequences.	Use Scenario: Connecting ISA-style parallel port peripherals (e.g., stepper motor controllers) to modern SoC-based carrier boards with 3.3V-only I/O. IC Role / Device Role / Timing Role: Voltage-tolerant bus buffer translating between 5V-tolerant legacy peripherals and 3.3V host logic without level shifters. Use Value: Maintains full 16-bit parallel throughput while supporting mixed-voltage signaling and hot-swap capability.

Memory Expansion Interface

PCI/PCIe Slot Isolation

Use Scenario: Adding SRAM or Flash memory banks to microcontroller-based industrial controllers while maintaining signal integrity across address/data buses.

IC Role / Device Role / Timing Role: Bidirectional bus switch enabling dynamic connection/disconnection of memory banks under firmware control via OE signals.

Use Value: Eliminates contention during memory remapping and reduces capacitive loading on shared buses, preserving setup/hold timing margins.

Use Scenario: Isolating add-in cards from host motherboard during hot-plug events in ruggedized embedded computing platforms.

IC Role / Device Role / Timing Role: High-speed bus isolator placed between PCIe slot edge connector and host controller, activated only during card enumeration.

Use Value: Prevents back-powering of unpowered cards and suppresses ground bounce during insertion/removal sequences.

Multi-Processor Interconnect

Legacy Peripheral Bridging

Use Scenario: Sharing a common data bus between two ARM Cortex-M7 cores operating at different power states in safety-critical avionics modules.

IC Role / Device Role / Timing Role: Dual-bank switch providing independent enable control for each processor's bus segment to prevent arbitration conflicts.

Use Value: Enables deterministic bus access scheduling and eliminates metastability risk during asymmetric wake-up sequences.

Use Scenario: Connecting ISA-style parallel port peripherals (e.g., stepper motor controllers) to modern SoC-based carrier boards with 3.3V-only I/O.

IC Role / Device Role / Timing Role: Voltage-tolerant bus buffer translating between 5V-tolerant legacy peripherals and 3.3V host logic without level shifters.

Use Value: Maintains full 16-bit parallel throughput while supporting mixed-voltage signaling and hot-swap capability.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74CBTLV16245PAG	Same die, identical electrical specs; differs only in packaging - tube vs. tape-and-reel delivery.	No functional difference; suitable for same PCB layouts and thermal profiles.	Select based on assembly line feeding requirements: PAG for manual/slow-volume, PAG8 for automated SMT placement.
74LVC16245APAG	Higher R_ON (12Ω typ.), no overvoltage tolerance, lower ESD rating (1500V HBM), and no guaranteed power-off isolation.	Not recommended for hot-swap or mixed-voltage isolation; limited to static 3.3V-only interconnects.	Choose only if cost sensitivity outweighs robustness needs and system does not require V_CC-off isolation.

Compared with SN74CBTLV16245PAG and 74LVC16245APAG, the 74CBTLV16245PAG8 delivers superior isolation integrity, tighter R_ON control, and broader voltage tolerance - critical for industrial systems requiring fail-safe bus management during power transitions.

Availability

74CBTLV16245PAG8 is available at Aetrix Electronics and suitable for industrial control systems, embedded networking hardware, and memory expansion modules requiring stable component supply and long-term lifecycle support.

Supply support for 74CBTLV16245PAG8 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 74CBTLV16245PAG8 belongs to Renesas' legacy IDT logic portfolio, designed specifically for high-speed, low-latency bus isolation and switching in 3.3V industrial and communications systems.

FAQ

What is the maximum allowable voltage on the I/O pins of the 74CBTLV16245PAG8 when V_CC is unpowered?

The 74CBTLV16245PAG8 guarantees overvoltage tolerance up to –0.5V to 4.6V on all I/O pins regardless of V_CC state. When V_CC = 0V, this allows safe connection to live 3.3V or 5V buses without risk of latch-up or damage - a key feature enabling hot-swap functionality in backplane and modular systems using the 74CBTLV16245PAG8.

Does the 74CBTLV16245PAG8 support true bidirectional signal flow without direction control pins?

Yes, the 74CBTLV16245PAG8 uses CMOS transmission-gate topology that enables passive, symmetric bidirectional conduction between Port A and Port B. Unlike transceivers, it requires no DIR pin - data flows equally well from A-to-B or B-to-A whenever the corresponding OE is asserted low. This simplifies PCB routing and eliminates direction-control timing constraints in the 74CBTLV16245PAG8 implementation.

How should unused OE inputs be handled on the 74CBTLV16245PAG8 to ensure proper startup behavior?

All unused OE inputs on the 74CBTLV16245PAG8 must be tied to V_CC through a pullup resistor (typically 10kΩ) to guarantee high-impedance state during power-up. Leaving OE floating risks metastable switching or unintended bus connection, potentially causing data corruption or bus contention. This requirement is explicitly documented in the 74CBTLV16245PAG8 datasheet to ensure deterministic initialization.

What is the typical on-resistance (R_ON) of the 74CBTLV16245PAG8 at 2.5V supply and how does it affect signal integrity?

At V_CC = 2.5V ± 0.2V and I_O = 24mA, the 74CBTLV16245PAG8 exhibits R_ON = 5Ω to 8Ω (typical 5Ω). This low resistance minimizes voltage drop (<200mV) and preserves rise/fall times across 50Ω–100Ω transmission lines, ensuring clean signal edges and reduced jitter in high-speed digital interfaces using the 74CBTLV16245PAG8.

Is the 74CBTLV16245PAG8 pin-compatible with older 74-series bus switches like the 74ACT16245?

No, the 74CBTLV16245PAG8 is not pin-compatible with 74ACT16245 due to differences in power pin distribution and NC placements. While both follow the 16245 functional pinout convention, the 74CBTLV16245PAG8 has four NC pins (4, 9, 10, 33) and dual V_CC/triple GND arrangement optimized for TSSOP-48, whereas 74ACT16245 uses SOIC-48 with different pin assignments. Board redesign is required to migrate to the 74CBTLV16245PAG8.

74CBTLV16245PAG8 Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: 74CBTLV

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: Bus Switch

Circuit:: 8 x 1:1

Independent Circuits:: 2

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:: 48-TSSOP

74CBTLV16245PAG8 FAQ

1.How can I place an order for 74CBTLV16245PAG8 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74CBTLV16245PAG8 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 74CBTLV16245PAG8 reliable?

The price and inventory of 74CBTLV16245PAG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74CBTLV16245PAG8 is usually 5 days.

3.What payment methods are accepted for 74CBTLV16245PAG8?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74CBTLV16245PAG8 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74CBTLV16245PAG8?

74CBTLV16245PAG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74CBTLV16245PAG8 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 74CBTLV16245PAG8?

For technical support, including 74CBTLV16245PAG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74CBTLV16245PAG8 requirements.

6.How does Aetrix verify that 74CBTLV16245PAG8 is sourced from the original manufacturer or authorized distributors?

All 74CBTLV16245PAG8 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 74CBTLV16245PAG8 meets industry standards.

7.What is the process for return or replacement of 74CBTLV16245PAG8?

All 74CBTLV16245PAG8 units undergo pre-shipment inspection (PSI). If there is an issue with 74CBTLV16245PAG8, 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 74CBTLV16245PAG8 part is unused and in its original packaging.

Return procedure for 74CBTLV16245PAG8:

1.Submit a request within 90 days.

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

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