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

Renesas 74CBTLV3257PGG8

Name: 74CBTLV3257PGG8
Brand: Renesas
SKU: 74CBTLV3257PGG8
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74CBTLV3257PGG8

Manufacturer:: Renesas

Category:: Signal Switches, Multiplexers, Decoders

Package:: 16-TSSOP (0.173", 4.40mm Width)

Datasheet:: 74CBTLV3257PGG8.pdf

Description:: IC MUX/DEMUX 4 X 1:2 16TSSOP

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Product details

Overview

74CBTLV3257PGG8 from Renesas Electronics is a low-voltage quad 2:1 multiplexer/demultiplexer bus switch with bi-directional 5Ω on-resistance, 2.3V–3.6V supply operation, and industrial temperature range (−40°C to +85°C). It enables high-speed 3.3V bus switching, isolation, and signal routing in memory and peripheral interconnects.

For engineers reviewing the 74CBTLV3257PGG8 datasheet, 74CBTLV3257PGG8 pinout, 74CBTLV3257PGG8 application, or 74CBTLV3257PGG8 equivalent, key selection criteria include guaranteed sub-0.25ns propagation delay, power-off isolation, over-voltage tolerance up to 4.6V, and TSSOP-16 package compatibility with high-density PCB layouts.

Technical Context

The 74CBTLV3257PGG8 implements four independent analog switches controlled by a shared select (S) and output-enable (OE) input. Each switch features symmetrical bidirectional conduction with minimal RC delay due to 5Ω typical R_ON and ≤13pF off-capacitance at the A port.

Its logic interface supports 2.3V–3.6V V_CC, with VIH/VIL thresholds scaled to V_CC (e.g., VIH = 2.0V min at V_CC ≥ 2.7V), and includes built-in power-up/down high-impedance safety via OE pull-up requirement.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2.3V to 3.6V - Ensures compatibility with 2.5V and 3.3V logic domains without level translation.
R_ON (Typ)	5Ω - Enables <0.25ns propagation delay and minimal signal distortion in high-speed bus applications.
t_PD Max	0.25ns - Guarantees sub-nanosecond timing for DDR, PCI Express, and other high-bandwidth interconnects.
Off-State Isolation	IOFF ≤ 50µA at V_CC = 0 - Maintains signal integrity during power sequencing or hot-swap events.
Over-Voltage Tolerance	VI/O up to +4.6V - Allows safe interfacing with mixed-voltage systems without external clamping.
ESD Rating	2000V HBM, 200V MM - Meets industrial reliability requirements for board-level handling and operation.
Operating Temp	−40°C to +85°C - Qualified for use in industrial control, networking, and embedded computing environments.

Pinout & Package

TSSOP-16 (PGG16) package: 4.4mm × 5.0mm body, 0.65mm pitch, exposed pad not present, RoHS-compliant green finish.

Pin/Terminal	Circuit Role	Design Meaning
1, 4, 5, 8, 10, 13, 14, 16	Data I/O (A/B ports)	Eight bidirectional data terminals grouped as four A/B pairs (1A/1B1/1B2, etc.) for mux/demux routing.
2, 3	Select & Output Enable	S (pin 2) selects B1/B2 path; OE (pin 3) disables all switches when high - both TTL-compatible with V_CC-referenced thresholds.
9	GND	Ground reference for all internal circuitry and I/O - must be low-impedance connection for noise immunity.
16	V_CC	Single-supply rail powering logic control and switch bias - decoupling capacitor required within 1cm of pin.

Key Features

Feature	Design Value
Bi-directional 5Ω Switch	Enables lossless signal routing in either direction without polarity constraints - critical for memory and test access buses.
Power-Off Isolation	IOFF ≤ 50µA ensures no leakage current between ports when V_CC = 0 - prevents back-driving of powered subsystems.
V_CC-Referenced Logic Inputs	VIH/VIL scale with supply voltage - eliminates need for external level shifters in mixed-V_CC designs.
Industrial Temperature Range	−40°C to +85°C operation validated per JEDEC JESD22-A104 - supports deployment in uncontrolled ambient environments.
Low Input Capacitance	CI = 4pF max per control input - minimizes loading on upstream drivers and preserves signal edge rates.

Applications

Memory Bus Isolation	PCI Express Lane Multiplexing
Use Scenario: Isolating DRAM address/data lines during system suspend/resume to prevent leakage and contention. IC Role / Device Role / Timing Role: Quad 2:1 bus switch providing selectable path between controller and two memory banks with <0.25ns delay. Use Value: Eliminates need for discrete isolation FETs while maintaining signal integrity across 3.3V memory interfaces.	Use Scenario: Sharing a single PCIe root complex lane between two endpoint devices using time-multiplexed access. IC Role / Device Role / Timing Role: Low-latency bidirectional switch enabling dynamic reconfiguration of high-speed serial links without protocol layer changes. Use Value: Reduces BOM count and PCB area versus discrete mux solutions while meeting PCIe Gen1/Gen2 timing budgets.
Hot-Swappable Module Interface	Test Access Port (TAP) Signal Routing
Use Scenario: Enabling safe insertion/removal of add-in cards in industrial backplanes where main power remains active. IC Role / Device Role / Timing Role: Over-voltage tolerant (up to +4.6V) bus switch isolating module I/O from host during insertion transient events. Use Value: Prevents damage to powered host logic during hot-swap sequences - no external TVS or series resistors required.	Use Scenario: Dynamically routing JTAG signals between multiple ASICs on a shared debug bus in production test fixtures. IC Role / Device Role / Timing Role: Quad 2:1 demux directing TCK/TMS/TDI/TDO to selected DUT under software control via S/OE inputs. Use Value: Supports automated boundary-scan testing of multi-chip modules without manual cable swapping or relay-based fixtures.

Memory Bus Isolation

PCI Express Lane Multiplexing

Use Scenario: Isolating DRAM address/data lines during system suspend/resume to prevent leakage and contention.

IC Role / Device Role / Timing Role: Quad 2:1 bus switch providing selectable path between controller and two memory banks with <0.25ns delay.

Use Value: Eliminates need for discrete isolation FETs while maintaining signal integrity across 3.3V memory interfaces.

Use Scenario: Sharing a single PCIe root complex lane between two endpoint devices using time-multiplexed access.

IC Role / Device Role / Timing Role: Low-latency bidirectional switch enabling dynamic reconfiguration of high-speed serial links without protocol layer changes.

Use Value: Reduces BOM count and PCB area versus discrete mux solutions while meeting PCIe Gen1/Gen2 timing budgets.

Hot-Swappable Module Interface

Test Access Port (TAP) Signal Routing

Use Scenario: Enabling safe insertion/removal of add-in cards in industrial backplanes where main power remains active.

IC Role / Device Role / Timing Role: Over-voltage tolerant (up to +4.6V) bus switch isolating module I/O from host during insertion transient events.

Use Value: Prevents damage to powered host logic during hot-swap sequences - no external TVS or series resistors required.

Use Scenario: Dynamically routing JTAG signals between multiple ASICs on a shared debug bus in production test fixtures.

IC Role / Device Role / Timing Role: Quad 2:1 demux directing TCK/TMS/TDI/TDO to selected DUT under software control via S/OE inputs.

Use Value: Supports automated boundary-scan testing of multi-chip modules without manual cable swapping or relay-based fixtures.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74CBTLV3257PWR	Same 5Ω R_ON, identical pinout, but TI version uses different ESD spec (2kV HBM only) and lacks V_CC-scaled VIH/VIL.	Requires tighter VIH margin control in 2.5V systems; less tolerant of V_CC variation near 2.3V.	Prefer 74CBTLV3257PGG8 when operating at minimum V_CC or requiring guaranteed VIH at 2.3V.
74LVC257PW,118	CMOS-based quad 2:1 mux with 3-state outputs - not bidirectional; R_ON > 20Ω; no power-off isolation.	Only suitable for unidirectional logic-level multiplexing; cannot replace 74CBTLV3257PGG8 in analog/bidirectional bus applications.	Select only if application requires strict 3-state control and tolerates higher R_ON and no isolation.

Compared with SN74CBTLV3257PWR and 74LVC257PW,118, the 74CBTLV3257PGG8 uniquely delivers bidirectional 5Ω switching, V_CC-adaptive logic thresholds, and guaranteed power-off isolation - making it the only option for robust, high-speed, mixed-voltage bus isolation in industrial systems.

Availability

74CBTLV3257PGG8 is available at Aetrix Electronics and suitable for memory bus isolation, PCIe lane sharing, hot-swap module interfaces, and JTAG signal routing requiring stable component supply and long-term industrial-grade availability.

Supply support for 74CBTLV3257PGG8 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 CBTLV family was designed specifically for high-speed, low-voltage bus switching in memory, test, and interconnect applications - emphasizing minimal propagation delay, bidirectional fidelity, and robust power sequencing behavior.

FAQ

What is the maximum operating voltage for 74CBTLV3257PGG8?

The 74CBTLV3257PGG8 supports an absolute maximum V_CC of +4.6V and input/output voltage tolerance up to +4.6V regardless of V_CC state. Its normal operating V_CC range is 2.3V to 3.6V. This over-voltage capability allows safe interfacing with higher-voltage peripherals without external protection components - a key design advantage of the 74CBTLV3257PGG8 in mixed-signal systems.

Does 74CBTLV3257PGG8 support bidirectional signal flow?

Yes, the 74CBTLV3257PGG8 provides fully bidirectional analog switching across all four channels. Each 2:1 mux/demux path has symmetrical 5Ω on-resistance and matched capacitance (C_IO(OFF) ≤13pF at A port), enabling equal performance whether signal originates from A or B side - essential for memory data bus and test access applications where direction reverses dynamically. This is a core functional attribute of the 74CBTLV3257PGG8.

How does 74CBTLV3257PGG8 behave during power-down?

When V_CC = 0V, the 74CBTLV3257PGG8 guarantees high-impedance isolation between all ports with IOFF ≤ 50µA, preventing back-powering or signal leakage. This power-off isolation is intrinsic to its architecture and requires no external circuitry - a critical feature for system-level power management and hot-swap compliance that distinguishes the 74CBTLV3257PGG8 from standard logic muxes.

What package type is used for 74CBTLV3257PGG8?

The 74CBTLV3257PGG8 is supplied in a Thin Shrink Small Outline Package (TSSOP-16) with package code PGG16. It measures 4.4mm × 5.0mm with 0.65mm lead pitch and complies with RoHS and green manufacturing standards. This compact, surface-mount package supports high-density PCB layouts typical in industrial and networking equipment where the 74CBTLV3257PGG8 is commonly deployed.

Can 74CBTLV3257PGG8 replace QS3257 in existing designs?

Yes, the 74CBTLV3257PGG8 is functionally equivalent to QS3257 as stated in its official documentation, with matching pinout, electrical specifications, and timing behavior. Both operate over 2.3V–3.6V and deliver 5Ω R_ON and sub-0.25ns t_PD. The 74CBTLV3257PGG8 maintains full drop-in compatibility while offering enhanced industrial temperature qualification and updated packaging - making it a direct upgrade path for QS3257-based systems.

74CBTLV3257PGG8 Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: 74CBTLV

Package/Case:: 16-TSSOP (0.173", 4.40mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: Multiplexer/Demultiplexer

Circuit:: 4 x 1:2

Independent Circuits:: 4

Current - Output High, Low:: -

Voltage Supply Source:: Single Supply

Voltage - Supply:: 2.3V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-TSSOP

74CBTLV3257PGG8 FAQ

1.How can I place an order for 74CBTLV3257PGG8 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74CBTLV3257PGG8 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 74CBTLV3257PGG8 reliable?

The price and inventory of 74CBTLV3257PGG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74CBTLV3257PGG8 is usually 5 days.

3.What payment methods are accepted for 74CBTLV3257PGG8?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74CBTLV3257PGG8 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74CBTLV3257PGG8?

74CBTLV3257PGG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74CBTLV3257PGG8 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 74CBTLV3257PGG8?

For technical support, including 74CBTLV3257PGG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74CBTLV3257PGG8 requirements.

6.How does Aetrix verify that 74CBTLV3257PGG8 is sourced from the original manufacturer or authorized distributors?

All 74CBTLV3257PGG8 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 74CBTLV3257PGG8 meets industry standards.

7.What is the process for return or replacement of 74CBTLV3257PGG8?

All 74CBTLV3257PGG8 units undergo pre-shipment inspection (PSI). If there is an issue with 74CBTLV3257PGG8, 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 74CBTLV3257PGG8 part is unused and in its original packaging.

Return procedure for 74CBTLV3257PGG8:

1.Submit a request within 90 days.

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

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