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

Nexperia USA Inc. CBTD3861BQ,118

Name: CBTD3861BQ,118
Brand: Nexperia USA Inc.
SKU: CBTD3861BQ,118
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CBTD3861BQ,118

Manufacturer:: Nexperia USA Inc.

Category:: Signal Switches, Multiplexers, Decoders

Package:: 24-VFQFN Exposed Pad

Datasheet:: CBTD3861BQ,118.pdf

Description:: IC BUS SWITCH 10 X 1:1 24DHVQFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

CBTD3861BQ,118 from Nexperia is a 10-bit bidirectional TTL-compatible bus switch with integrated 5 V to 3.3 V level shifting, active-low output enable (OE), 5 Ω typical ON resistance, and operation across -40 °C to +85 °C. It enables high-speed data routing between mismatched voltage domains in memory expansion interfaces and peripheral interconnects.

For engineers reviewing the CBTD3861BQ,118 datasheet, CBTD3861BQ,118 pinout, CBTD3861BQ,118 application, or CBTD3861BQ,118 equivalent, key selection criteria include bidirectional level-shifting capability, sub-0.25 ns propagation delay, OE-controlled isolation, and DHVQFN24 thermal performance in space-constrained PCB layouts.

Technical Context

The CBTD3861BQ implements a passive FET-based analog switch architecture with no internal logic or latching-signal path transparency is maintained when OE is LOW. Its 10 independent A↔B channels support simultaneous bidirectional data flow without direction control pins.

Level shifting is achieved via internal clamping diodes and rail-to-rail conduction, enabling interoperability between 5 V TTL outputs and 3.3 V CMOS inputs. The device operates with zero static power draw in both ON and OFF states, drawing only 1.5 mA typical ICC at VCC = 5.5 V with all inputs biased.

Key Specifications

Parameter	Value and Actual Design Meaning
ON Resistance	5 Ω typical at VCC = 4.5 V, 64 mA - ensures minimal voltage drop and signal integrity for 3.3 V logic thresholds
Propagation Delay	0.25 ns max - supports >1 GHz data rates in high-speed parallel buses
Enable/Disable Time	ten = 10.0 ns max, tdis = 6.0 ns max - enables precise timing control in synchronous bus arbitration
Supply Voltage Range	4.5 V to 5.5 V - compatible with standard 5 V logic rails while safely interfacing 3.3 V systems
ESD Protection	HBM >2000 V, CDM >1000 V - meets industrial IEC 61000-4-2 robustness requirements
Operating Temperature	-40 °C to +85 °C - qualified for extended industrial ambient conditions
Input Compatibility	TTL-level VIH ≥ 2.0 V, VIL ≤ 0.8 V - directly accepts legacy 5 V TTL control signals

Pinout & Package

DHVQFN24 package (SOT815-1): 3.5 × 5.5 × 0.85 mm body, 24-terminal no-lead quad flat design with exposed thermal pad (GND-connected or floating per layout).

Pin/Terminal	Circuit Role	Design Meaning
A1–A10	Data port A (bidirectional)	Connects to 5 V domain side; each pin electrically isolated but functionally paired with corresponding Bn
B1–B10	Data port B (bidirectional)	Connects to 3.3 V domain side; mirrors A-port functionality with level-shifted signal transfer
OE	Output enable (active LOW)	Asserting LOW enables all 10 channels; HIGH places all ports in high-impedance OFF state
VCC	Positive supply	5 V rail only; powers internal clamp circuitry and defines logic threshold reference
GND	Ground reference	Signal and supply return; thermal pad may be connected to GND plane for enhanced thermal dissipation
n.c.	No-connect terminal	Terminal 1 is mechanically present but unconnected internally; no electrical function or routing required

Key Features

Feature	Design Value
Integrated 5 V ↔ 3.3 V level shifting	Eliminates need for external resistive dividers or dedicated level translators in mixed-voltage bus architectures
5 Ω low ON resistance	Reduces insertion loss and maintains rise/fall time integrity for signals up to 500 Mbps per line
Latch-up immunity >100 mA	Ensures robust operation under transient overvoltage or ESD-induced current injection events
Zero static power in OFF state	Enables always-on system partitioning without standby current penalty during bus isolation
Thermally enhanced DHVQFN24	0.85 mm profile and exposed pad support high-density placement with improved thermal resistance vs. TSSOP

Applications

Memory Expansion Interface

Peripheral Bridge Interface

Use Scenario: Connecting legacy 5 V SRAM or Flash memory to a 3.3 V microcontroller bus.

IC Role / Device Role / Timing Role: Bidirectional level-shifting bus switch enabling transparent address/data/control signal translation without added latency.

Use Value: Eliminates timing skew from discrete resistor networks and supports full bus bandwidth (≥100 MHz) with <0.25 ns added delay.

Use Scenario: Isolating and translating signals between a 5 V UART controller and 3.3 V Bluetooth module.

IC Role / Device Role / Timing Role: OE-gated signal conduit providing voltage-domain bridging and hot-swap-safe isolation.

Use Value: Enables clean power sequencing and prevents back-powering of 3.3 V peripherals during 5 V subsystem reset.

Industrial PLC Backplane

Test Equipment Signal Routing

Use Scenario: Interfacing 5 V I/O modules with 3.3 V FPGA-based central logic in modular automation racks.

IC Role / Device Role / Timing Role: High-reliability bus switch supporting hot-plug detection and fault-isolated channel enable/disable.

Use Value: Delivers latch-up immunity and HBM >2 kV ESD protection required for field-deployed industrial hardware.

Use Scenario: Reconfigurable signal path selection in automated test equipment switching matrices.

IC Role / Device Role / Timing Role: Low-R_ON, low-capacitance switch enabling repeatable 50 Ω impedance matching and minimal crosstalk.

Use Value: Maintains signal fidelity for 100+ MHz digital test vectors with <4 pF off-state capacitance per channel.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 10-bit level-shifting bus switch applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74CBT3384APW	10-bit, TSSOP24, R_ON = 6 Ω typical, VCC = 4.5–5.5 V, no internal level-shifting diodes	Requires external clamping for 5 V ↔ 3.3 V translation; higher layout complexity	Preferred where board area allows TSSOP and external diode network is acceptable
PI3CHD3245LEX	10-bit, QFN24, R_ON = 7 Ω typical, supports 1.8 V–5.5 V dual-supply operation, no integrated diodes	Needs dual VCCA/VCCB supplies; lacks built-in 5 V→3.3 V clamping	Chosen when multi-voltage domain support (e.g., 1.8 V ↔ 3.3 V) is required beyond 5 V/3.3 V

Compared with SN74CBT3384APW and PI3CHD3245LEX, CBTD3861BQ,118 uniquely integrates level-shifting diodes and delivers lowest R_ON in DHVQFN24, reducing BOM count and improving signal integrity in fixed 5 V/3.3 V interconnects.

Availability

CBTD3861BQ,118 is available at Aetrix Electronics and suitable for memory expansion interfaces, industrial PLC backplanes, peripheral bridge interfaces, and automated test equipment requiring stable component supply and guaranteed long-term sourcing.

Supply support for CBTD3861BQ,118 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, reliable discrete, logic, and MOSFET solutions with focus on efficiency, reliability, and miniaturization.

CBTD3861BQ,118 belongs to Nexperia's high-speed bus switch product line, engineered for low-latency, low-R_ON voltage-domain bridging in industrial and computing infrastructure applications.

FAQ

Can CBTD3861BQ,118 operate with VCC = 3.3 V?

No. The CBTD3861BQ,118 is specified only for VCC = 4.5 V to 5.5 V. Its internal clamping diodes and TTL-compatible input thresholds require a 5 V supply to achieve correct 5 V → 3.3 V level shifting. Operation below 4.5 V violates recommended operating conditions and risks unreliable switching behavior.

Is the thermal pad (terminal 1) required to be soldered to GND?

No. Terminal 1 is a no-connect pad attached to the die substrate via conductive die attach material. Soldering it is optional: if connected, it must remain floating or be tied to GND; no electrical requirement exists, but GND connection improves thermal performance in high-duty-cycle applications.

What is the maximum capacitive load the CBTD3861BQ,118 can drive while maintaining 0.25 ns propagation delay?

The 0.25 ns propagation delay is characterized with CL = 50 pF (including jig and probe capacitance). Driving loads significantly above 50 pF increases RC delay proportionally; for example, at 100 pF, measured t_pd rises to ~0.4 ns. Layout parasitics must be minimized to stay within specification.

Does CBTD3861BQ,118 support hot-swap insertion while powered?

Yes. With OE held HIGH during insertion, all channels remain in high-impedance OFF state, preventing back-driving or bus contention. The device's ±128 mA output current limit and >100 mA latch-up immunity provide inherent protection during live insertion into an active 5 V/3.3 V bus environment.

CBTD3861BQ,118 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: 24-VFQFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Type:: Bus Switch

Circuit:: 10 x 1:1

Independent Circuits:: 1

Current - Output High, Low:: -

Voltage Supply Source:: Single Supply

Voltage - Supply:: 4.5V ~ 5.5V

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 24-DHVQFN (5.5x3.5)

CBTD3861BQ,118 FAQ

1.How can I place an order for CBTD3861BQ,118 through Aetrix?

Please submit a Request for Quotation (RFQ) for CBTD3861BQ,118 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 CBTD3861BQ,118 reliable?

The price and inventory of CBTD3861BQ,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CBTD3861BQ,118 is usually 5 days.

3.What payment methods are accepted for CBTD3861BQ,118?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CBTD3861BQ,118 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CBTD3861BQ,118?

CBTD3861BQ,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CBTD3861BQ,118 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 CBTD3861BQ,118?

For technical support, including CBTD3861BQ,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CBTD3861BQ,118 requirements.

6.How does Aetrix verify that CBTD3861BQ,118 is sourced from the original manufacturer or authorized distributors?

All CBTD3861BQ,118 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 CBTD3861BQ,118 meets industry standards.

7.What is the process for return or replacement of CBTD3861BQ,118?

All CBTD3861BQ,118 units undergo pre-shipment inspection (PSI). If there is an issue with CBTD3861BQ,118, 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 CBTD3861BQ,118 part is unused and in its original packaging.

Return procedure for CBTD3861BQ,118:

1.Submit a request within 90 days.

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

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