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Renesas 74CBTLV3251PGG
- Part No.:
- 74CBTLV3251PGG
- Manufacturer:
- Renesas
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74CBTLV3251PGG.pdf
- Description:
- IC MUX/DEMUX 1 X 8:1 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,345
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Product details
Overview
74CBTLV3251PGG from Renesas Electronics is a low-voltage 8:1 bi-directional multiplexer/demultiplexer IC with 5Ω on-state resistance, 2.3V–3.6V supply range, and industrial temperature operation (−40°C to +85°C), used for high-speed signal routing in FPGA I/O expansion and memory interface bus switching.
For engineers reviewing the 74CBTLV3251PGG datasheet, 74CBTLV3251PGG pinout, 74CBTLV3251PGG application, or 74CBTLV3251PGG equivalent, key selection considerations include its 0.15ns typical propagation delay, over-voltage tolerance up to +4.6V, isolation under power-off conditions, and TSSOP-16 package compatibility with dense PCB layouts.
Technical Context
The 74CBTLV3251PGG implements an 8:1 analog switch architecture using NMOS pass transistors with integrated level-shifting control logic, enabling bidirectional signal flow between A and any of eight B ports (B1–B8). Its select inputs (S0–S2) decode binary addresses while OE enables/disables all switches simultaneously.
Designed for low-latency digital signal routing, it features rail-to-rail input voltage tolerance (−0.5V to +4.6V), 40.5pF off-state capacitance at the A port, and 5µA maximum off-state leakage (IOFF) at VCC = 0V - critical for hot-swap and partial-power-down system architectures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3V–3.6V - supports dual-supply systems interfacing with 2.5V and 3.3V logic domains without level shifters |
| RON (Typ) | 5Ω - minimizes insertion loss and timing skew in high-speed parallel bus applications |
| tPD (Max) | 0.25ns - enables sub-nanosecond signal path timing for >1GHz data rates |
| IOFF (Max) | 50µA at VCC = 0V - ensures signal isolation during power sequencing or standby modes |
| VI/O Range | −0.5V to +4.6V - allows safe connection to over-voltage sources without clamping diode conduction |
| ESD Rating | 2000V HBM, 200V MM - meets industrial handling requirements without external protection |
| Temp Range | −40°C to +85°C - qualified for deployment in industrial automation and telecom infrastructure |
Pinout & Package
TSSOP-16 package (PGG16 code), 4.4mm × 5.0mm body, 0.65mm pitch, exposed pad not present, JEDEC MO-153 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Primary return path for all internal switch and control circuitry |
| 2 (B1) | Data input/output terminal | One of eight bi-directional channel ports; connects to A when S2:S0 = 000 |
| 3 (B2) | Data input/output terminal | Second channel port; connects to A when S2:S0 = 001 |
| 4 (B3) | Data input/output terminal | Third channel port; connects to A when S2:S0 = 010 |
| 5 (B4) | Data input/output terminal | Fourth channel port; connects to A when S2:S0 = 011 |
| 6 (B5) | Data input/output terminal | Fifth channel port; connects to A when S2:S0 = 100 |
| 7 (B6) | Data input/output terminal | Sixth channel port; connects to A when S2:S0 = 101 |
| 8 (B7) | Data input/output terminal | Seventh channel port; connects to A when S2:S0 = 110 |
| 9 (B8) | Data input/output terminal | Eighth channel port; connects to A when S2:S0 = 111 |
| 10 (OE) | Output enable control | Active-low global enable; high state forces all switches into high-impedance mode |
| 11 (S0) | Select address bit | LSB of 3-bit channel address; sampled synchronously with OE |
| 12 (S1) | Select address bit | Mid-bit of 3-bit channel address |
| 13 (S2) | Select address bit | MSB of 3-bit channel address |
| 14 (A) | Common data port | Bi-directional hub terminal; routes to selected Bx port when OE = L |
| 15 (VCC) | Power supply | Single positive supply for core logic and switch biasing; decoupling required near pin |
| 16 (NC) | No connect | Internally unused; must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| 5Ω typical on-resistance | Enables minimal signal attenuation and consistent impedance matching across all 8 channels |
| Power-off isolation | Prevents back-driving of powered subsystems when VCC = 0V, supporting live-insertion designs |
| Over-voltage tolerant I/O | Accepts inputs up to +4.6V regardless of VCC level - eliminates need for external clamping in mixed-voltage systems |
| Latch-up immunity >100mA | Guarantees robust operation under transient fault conditions without destructive latch-up |
| Industrial temperature range | Validated operation from −40°C to +85°C ensures reliability in factory-floor and outdoor equipment |
Applications
| FPGA I/O Expansion | Memory Bus Switching |
|---|---|
Use Scenario: Expanding limited FPGA GPIO count by sharing a single data bus among multiple peripheral devices. IC Role / Device Role / Timing Role: Bi-directional 8:1 signal router that dynamically connects FPGA data lines to one of eight peripherals based on address decode. Use Value: Eliminates need for discrete logic or additional FPGA resources; maintains <0.25ns propagation delay across all channels. | Use Scenario: Sharing a DDR2/DDR3 memory controller bus between two independent memory modules. IC Role / Device Role / Timing Role: High-speed bidirectional bus switch enabling time-multiplexed access to separate memory banks. Use Value: Preserves signal integrity with 5Ω RON and 40.5pF off-capacitance, avoiding timing violations in 400+ MHz memory interfaces. |
| Hot-Swap Backplane Interface | Test Access Multiplexing |
Use Scenario: Routing JTAG or UART debug signals to multiple board slots in a modular chassis without powering down the system. IC Role / Device Role / Timing Role: Isolation-enabled multiplexer ensuring signal integrity and preventing backfeed during card insertion/removal. Use Value: IOFF ≤50µA at VCC = 0V and over-voltage tolerance allow safe connection to live backplane traces. | Use Scenario: Selecting one of eight sensor nodes for calibration or diagnostics via a shared test interface. IC Role / Device Role / Timing Role: Low-leakage, low-RON analog switch enabling precise DC and AC signal routing during production test. Use Value: 5Ω RON and ±1µA control input leakage ensure measurement accuracy without loading source circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8:1 multiplexer/demultiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT3251PWR | Higher RON (7Ω typ), wider VCC range (4.5V–5.5V), no over-voltage tolerance beyond VCC | Requires 5V-only systems; unsuitable for mixed-voltage or hot-swap use cases | Choose only if legacy 5V design mandates TTL-compatible supply and over-voltage tolerance is unnecessary |
| PI3CH480QEX | Lower RON (3.5Ω typ), supports 1.8V–5.5V, but lacks power-off isolation and has higher IOFF (100µA) | Not suitable for partial-power-down architectures where VCC may be absent while signals remain active | Select when lowest possible on-resistance is critical and full power sequencing control is managed externally |
Compared with SN74CBT3251PWR and PI3CH480QEX, the 74CBTLV3251PGG uniquely combines 5Ω RON, −0.5V to +4.6V I/O tolerance, and guaranteed power-off isolation - making it the only option qualified for industrial hot-swap and mixed-voltage bus sharing without external protection.
Availability
74CBTLV3251PGG is available at Aetrix Electronics and suitable for FPGA I/O expansion, memory bus switching, and hot-swap backplane interface applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for 74CBTLV3251PGG 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 SoC solutions for automotive, industrial, infrastructure, and IoT markets.
The 74CBTLV3251PGG belongs to Renesas' CBTLV family of low-voltage bus switches, engineered specifically for high-speed, low-distortion signal routing in space-constrained industrial and communications equipment.
FAQ
What is the maximum operating voltage on the I/O pins of the 74CBTLV3251PGG?
The 74CBTLV3251PGG supports an absolute maximum I/O voltage range of −0.5V to +4.6V, independent of VCC level. This over-voltage tolerance allows direct connection to 5V-tolerant buses or sensors without external clamping, even when VCC is powered at 2.5V or 3.3V. The specification is validated per ABSOLUTE MAXIMUM RATINGS in the official Renesas datasheet DSC-5403/7.
Does the 74CBTLV3251PGG support hot-swap or partial-power-down operation?
Yes, the 74CBTLV3251PGG provides guaranteed power-off isolation: when VCC = 0V, IOFF remains ≤50µA and the switches remain fully off, preventing back-current flow between live B-port signals and the unpowered A port. This behavior is explicitly characterized in the DC Electrical Characteristics table and supports safe hot-plug operation in modular systems.
What is the typical on-state resistance (RON) of the 74CBTLV3251PGG and how does it vary with supply voltage?
The 74CBTLV3251PGG exhibits a typical RON of 5Ω at VCC = 2.3V and IO = 64mA, rising to 10Ω at VCC = 3.0V with VI = 2.4V and IO = 15mA. These values are measured per the datasheet's DC ELECTRICAL CHARACTERISTICS table and reflect actual channel resistance under defined load and bias conditions - critical for predicting voltage drop and timing skew in high-current signal paths.
Can the 74CBTLV3251PGG be used in bidirectional signal routing applications?
Yes, the 74CBTLV3251PGG is inherently bidirectional: signal flow between the A port and any selected Bx port is symmetric with identical RON, tPD, and capacitance characteristics in both directions. The functional block diagram and switching characteristics tables confirm equal A→B and B→A propagation delay (tPD ≤ 0.25ns), making it suitable for bidirectional data buses such as I²C, SMBus, or shared test interfaces.
What package type is used for the 74CBTLV3251PGG and what are its key mechanical dimensions?
The 74CBTLV3251PGG uses a 16-pin Thin Shrink Small Outline Package (TSSOP) with package code PGG16. Its body measures 4.4mm × 5.0mm with 0.65mm lead pitch, conforms to JEDEC MO-153, and has no exposed thermal pad. Pin 16 is NC (no connect), and the package is RoHS-compliant and halogen-free per Renesas ordering information.
74CBTLV3251PGG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 74CBTLV
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- Multiplexer/Demultiplexer
- Circuit:
- 1 x 8:1
- 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:
- 16-TSSOP
74CBTLV3251PGG FAQ
1.How can I place an order for 74CBTLV3251PGG through Aetrix?
Please submit a Request for Quotation (RFQ) for 74CBTLV3251PGG 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 74CBTLV3251PGG reliable?
The price and inventory of 74CBTLV3251PGG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74CBTLV3251PGG is usually 5 days.
3.What payment methods are accepted for 74CBTLV3251PGG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74CBTLV3251PGG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74CBTLV3251PGG?
74CBTLV3251PGG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74CBTLV3251PGG 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 74CBTLV3251PGG?
For technical support, including 74CBTLV3251PGG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74CBTLV3251PGG requirements.
6.How does Aetrix verify that 74CBTLV3251PGG is sourced from the original manufacturer or authorized distributors?
All 74CBTLV3251PGG 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 74CBTLV3251PGG meets industry standards.
7.What is the process for return or replacement of 74CBTLV3251PGG?
All 74CBTLV3251PGG units undergo pre-shipment inspection (PSI). If there is an issue with 74CBTLV3251PGG, 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 74CBTLV3251PGG part is unused and in its original packaging.
Return procedure for 74CBTLV3251PGG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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