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Nexperia USA Inc. 74CBTLV3245BQ,115
- Part No.:
- 74CBTLV3245BQ,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
74CBTLV3245BQ,115.pdf
- Description:
- IC BUS SWITCH 8 X 1:1 20DHVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:9,014
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Product details
Overview
74CBTLV3245BQ,115 from Nexperia is an 8-bit CMOS bus switch with active-low output enable (OE), designed for high-speed bidirectional signal routing in low-voltage digital systems. It provides rail-to-rail switching across two 8-bit ports (A1–A8 and B1–B8), features 5 Ω typical ON-resistance at 3.3 V, supports partial power-down via IOFF circuitry, and operates from −40 °C to +125 °C - used in FPGA I/O expansion and memory address multiplexing.
For engineers reviewing the 74CBTLV3245BQ,115 datasheet, 74CBTLV3245BQ,115 pinout, 74CBTLV3245BQ,115 application, or 74CBTLV3245BQ,115 equivalent, key selection criteria include guaranteed sub-5 ns enable/disable timing, ±100 μA max ICC at 3.6 V, Schmitt-trigger OE input for noise immunity, and DHVQFN20 thermal-enhanced packaging for dense PCB layouts.
Technical Context
This device implements eight independent analog/digital bidirectional switches controlled by a single active-low OE input. Each switch exhibits low-impedance conduction (RON ≤ 11 Ω typical at VCC = 3.3 V, ISW = 64 mA) and high-impedance isolation (CS(OFF) = 5.2 pF) when disabled.
The IOFF circuit ensures leakage current remains below ±50 μA during partial power-down, while Schmitt-trigger action on OE enables robust operation with slow-rising control signals. All I/O pins tolerate voltages up to VCC + 0.5 V in both ON and OFF states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 2.3 V to 3.6 V - compatible with 2.5 V and 3.3 V logic domains without level shifting |
| ON-resistance (typ) | 4.0 Ω at VCC = 3.3 V, ISW = 64 mA - minimizes signal attenuation and timing skew in high-speed data paths |
| Propagation delay | 0.20 ns typical at VCC = 3.3 V - preserves signal integrity in >500 MHz data buses |
| Enable/disable time | 3.0 ns / 3.4 ns typical at VCC = 3.3 V - enables precise timing control in synchronous multiplexing |
| IOFF leakage | ±50 μA max at VCC = 0 V - prevents backflow current during hot-swap or partial power-down sequences |
| Operating temperature | −40 °C to +125 °C - qualified for industrial and extended-temperature embedded applications |
| ESD protection | HBM >2000 V, CDM >1000 V - withstands handling and board-level ESD events without latch-up |
Pinout & Package
DHVQFN20 package (SOT764-1): 2.5 × 4.5 × 0.85 mm body, 20-terminal no-lead quad flat design with exposed thermal pad (GND-connected or floating per layout requirements).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1–A8 | Data I/O port A | Bidirectional signal path terminal; electrically identical to Bn pins; supports rail-to-rail voltage swing |
| B1–B8 | Data I/O port B | Complementary 8-bit bus port; each pair (An/Bn) forms one independent switch channel |
| OE | Active-low output enable | Drives all eight switches ON when LOW; HIGH places all channels in high-Z state; Schmitt-trigger input |
| VCC | Positive supply | Primary power rail; powers internal logic and switch transistors; must be decoupled locally |
| GND | Ground reference | Signal and power return; thermal pad (terminal 1) may be left floating or connected to GND for thermal relief |
| n.c. | No connect | Terminal 1 index area corner pin - not bonded; no electrical function |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog switching | Supports full VCC-to-GND signal range on both A and B ports - eliminates level-shifter requirement in mixed-voltage interconnects |
| IOFF partial power-down | Blocks backflow current when VCC = 0 V - enables safe insertion/removal in live-backplane systems |
| Low ON-capacitance | CS(ON) = 14.3 pF typical - reduces loading on high-frequency clock/data lines and maintains signal edge rates |
| High noise immunity | Schmitt-trigger OE input with hysteresis ≥ 0.5 V - rejects <10 ns glitches and ensures clean channel activation |
| JEDEC-compliant interface | Meets JESD8-5 (2.3–2.7 V) and JESD8-B/JESD36 (2.7–3.6 V) - guarantees interoperability with standard LVCMOS logic families |
Applications
| PCIe Gen3 Switching Interface | FPGA I/O Expansion Hub |
|---|---|
|
Use Scenario: Routing PCIe reference clocks and sideband signals between multiple M.2 slots and host controller. IC Role / Device Role / Timing Role: Bidirectional analog switch enabling dynamic clock source selection without signal degradation. Use Value: 4.0 Ω RON and 14.3 pF CS(ON) preserve 8 GT/s eye diagram integrity; IOFF prevents slot power sequencing conflicts. |
Use Scenario: Expanding limited FPGA I/O banks to drive multiple peripheral interfaces (SPI, I²C, GPIO). IC Role / Device Role / Timing Role: Low-latency bus switch isolating unused peripherals while maintaining signal fidelity. Use Value: 0.20 ns propagation delay and sub-5 ns enable timing allow real-time reconfiguration without pipeline stalls. |
| DDR3 Memory Address Multiplexer | Industrial CAN FD Transceiver Isolation |
|
Use Scenario: Sharing DDR3 address/command bus among two memory controllers in redundant systems. IC Role / Device Role / Timing Role: High-speed bidirectional switch enabling fast bus arbitration with deterministic latency. Use Value: −40 °C to +125 °C rating and 5 Ω RON ensure stable setup/hold margins across temperature extremes. |
Use Scenario: Isolating CAN FD transceiver nodes during firmware updates or fault recovery in distributed control networks. IC Role / Device Role / Timing Role: Signal path gate preventing bus contention during node reset cycles. Use Value: IOFF protection blocks reverse current into powered-down transceivers; Schmitt-trigger OE tolerates noisy field wiring. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT3245PWR | Higher RON (7 Ω typ at 3.3 V); TSSOP20 package; no IOFF support | Lacks partial power-down capability; unsuitable for hot-swap or mixed-power-domain designs | Select only when thermal budget allows TSSOP and system power sequencing is fully synchronized |
| 74LVC2G66DC | 2-channel only; 6 Ω RON; same DHVQFN8 package; IOFF supported | Requires four units to match 8-bit functionality; increases board area and routing complexity | Prefer for space-constrained designs where only two signal pairs need isolation |
Compared with SN74CBT3245PWR and 74LVC2G66DC, the 74CBTLV3245BQ,115 uniquely delivers 8-channel integration, industry-leading 4.0 Ω RON, and certified IOFF behavior - making it optimal for thermally constrained, high-reliability industrial multiplexing where single-package simplicity and fail-safe power-down are mandatory.
Availability
74CBTLV3245BQ,115 is available at Aetrix Electronics and suitable for FPGA I/O expansion, DDR3 memory address multiplexing, PCIe Gen3 switching interfaces, and industrial CAN FD transceiver isolation requiring stable component supply across extended temperature ranges.
Supply support for 74CBTLV3245BQ,115 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
Nexperia is a global semiconductor expert delivering high-performance logic, discrete, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in industrial, automotive, and computing applications.
The 74CBTLV series targets high-speed digital interconnects demanding ultra-low resistance, minimal capacitance, and robust power-down safety - specifically engineered for next-generation data-intensive embedded systems.
FAQ
What is the maximum allowable voltage on A/B pins when VCC = 0 V?
The 74CBTLV3245BQ,115 supports VSW = −0.5 V to VCC + 0.5 V in both enable and disable modes. When VCC = 0 V, A/B pins tolerate −0.5 V to +0.5 V, and IOFF limits leakage to ±50 μA - enabling safe signal presence during complete power removal.
Can OE be driven directly from a 1.8 V microcontroller GPIO?
No. VIH minimum is 2.0 V at VCC ≥ 3.0 V and 1.7 V at VCC = 2.3–2.7 V. A 1.8 V GPIO cannot reliably assert OE HIGH; level translation or pull-up to VCC is required to meet input threshold specifications across temperature.
Is the thermal pad (terminal 1) required to be soldered to ground?
No. Per datasheet note, the thermal pad has no electrical requirement. It may remain floating or be connected to GND solely for thermal relief - but if connected, the solder land must not create unintended ground loops or violate isolation boundaries.
How does the device behave when OE is left floating?
OE has no internal pull-up/down. A floating OE defaults to indeterminate logic level, risking partial or intermittent switching. External pull-down resistor (≤10 kΩ to GND) is mandatory to guarantee defined OFF-state operation during power-up or reset.
74CBTLV3245BQ,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74CBTLV
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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 ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-DHVQFN (4.5x2.5)
74CBTLV3245BQ,115 FAQ
1.How can I place an order for 74CBTLV3245BQ,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74CBTLV3245BQ,115 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 74CBTLV3245BQ,115 reliable?
The price and inventory of 74CBTLV3245BQ,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74CBTLV3245BQ,115 is usually 5 days.
3.What payment methods are accepted for 74CBTLV3245BQ,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74CBTLV3245BQ,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74CBTLV3245BQ,115?
74CBTLV3245BQ,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74CBTLV3245BQ,115 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 74CBTLV3245BQ,115?
For technical support, including 74CBTLV3245BQ,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74CBTLV3245BQ,115 requirements.
6.How does Aetrix verify that 74CBTLV3245BQ,115 is sourced from the original manufacturer or authorized distributors?
All 74CBTLV3245BQ,115 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 74CBTLV3245BQ,115 meets industry standards.
7.What is the process for return or replacement of 74CBTLV3245BQ,115?
All 74CBTLV3245BQ,115 units undergo pre-shipment inspection (PSI). If there is an issue with 74CBTLV3245BQ,115, 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 74CBTLV3245BQ,115 part is unused and in its original packaging.
Return procedure for 74CBTLV3245BQ,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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