NXP Semiconductors 74CBTLV3861DK,118

Overview

74CBTLV3861DK,118 from Nexperia is a 10-bit CMOS bus switch with single active-low output enable (OE), operating from 2.3 V to 3.6 V supply. It provides bidirectional signal routing between A and B ports with 5 Ω typical ON-resistance, rail-to-rail switching, and IOFF partial power-down protection. It is used in high-speed data path isolation for memory expansion, FPGA I/O buffering, and hot-swap interface control.

For engineers reviewing the 74CBTLV3861DK,118 datasheet, 74CBTLV3861DK,118 pinout, 74CBTLV3861DK,118 application, or 74CBTLV3861DK,118 equivalent, key selection considerations include its 0.2 ns propagation delay at 3.3 V, ±128 mA switch current rating, Schmitt-trigger OE input for noise immunity, and guaranteed operation from –40 °C to +125 °C.

Technical Context

The 74CBTLV3861DK,118 implements a low-impedance transmission gate architecture per bit, enabling true bidirectional, voltage-transparent signal flow without level shifting. Its IOFF circuitry actively disables all switches and blocks backflow current when VCC = 0 V, supporting live insertion and partial power-down systems.

Schmitt-trigger action on the OE input ensures clean, jitter-free enable/disable transitions even with slow-rising control signals across the full 2.3–3.6 V VCC range. The device complies with JEDEC JESD8-5 (2.3–2.7 V) and JESD8-B/JESD36 (2.7–3.6 V) standards for interface compatibility.

Key Specifications

Pinout & Package

74CBTLV3861DK,118 is packaged in SSOP24 (SOT556-1), a 24-pin plastic shrink small outline package with 0.65 mm lead pitch and body width of 5.3 mm. Pin 1 index is marked by a notch or dimple at the top-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT3861PWR and 74LVC1G3157GW,125, the 74CBTLV3861DK,118 delivers lower ON-resistance (4.0 Ω vs 7.5 Ω), tighter propagation delay (0.31 ns vs 0.45 ns), and native 10-bit integration-reducing component count, PCB area, and interconnect parasitics in dense high-speed bus architectures.

Availability

74CBTLV3861DK,118 is available at Aetrix Electronics and suitable for memory expansion interfaces, FPGA I/O buffering, hot-swap backplane control, PCIe lane multiplexing, and industrial temperature-critical data path isolation requiring stable component supply and long-term lifecycle support.

Supply support for 74CBTLV3861DK,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 focused on high-volume, high-reliability essential semiconductors for automotive, industrial, and consumer applications.

The 74CBTLV3861DK,118 belongs to Nexperia's CBTLV (Configurable Bus Transceiver Low-Voltage) family, designed specifically for low-latency, low-power, high-density bus switching in advanced digital systems requiring robust hot-swap and partial power-down capability.

FAQ

What is the maximum operating frequency supported by the 74CBTLV3861DK,118?

The 74CBTLV3861DK,118 has a –3 dB bandwidth of 406 MHz at 3.3 V, enabling reliable operation with data rates up to 5 Gbps in PCIe Gen2 applications. Its 0.31 ns max propagation delay and 14.3 pF ON-state capacitance ensure minimal signal distortion in high-speed parallel or serial bus environments where the 74CBTLV3861DK,118 is deployed.

Does the 74CBTLV3861DK,118 support partial power-down mode?

Yes, the 74CBTLV3861DK,118 integrates IOFF circuitry that actively disables all switches and limits power-off leakage current to ±50 μA when VCC = 0 V. This feature prevents damaging backflow current through the 74CBTLV3861DK,118 during hot-plug events or system-level partial power-down sequences.

What is the recommended pull-up resistor value for the OE pin of the 74CBTLV3861DK,118?

The OE pin of the 74CBTLV3861DK,118 should be tied to VCC via a pull-up resistor whose minimum value is determined by the current-sinking capability of the driver. For standard CMOS drivers, a 10 kΩ resistor is commonly used; however, the exact value must be calculated based on the driver's VOL and sink current to guarantee OE remains below 0.9 V (VIL max) under worst-case conditions for the 74CBTLV3861DK,118.

Is the 74CBTLV3861DK,118 pin-compatible with other packages in the same family?

No, the 74CBTLV3861DK,118 uses the SSOP24 (SOT556-1) package, which differs mechanically and electrically from the TSSOP24 (SOT355-1) and DHVQFN24 (SOT815-1) variants. While functional behavior is identical, PCB layout, thermal pad connection, and solder reflow profiles are not interchangeable - the 74CBTLV3861DK,118 requires its specific footprint and land pattern.

What is the typical ON-resistance of the 74CBTLV3861DK,118 at 2.5 V supply?

At VCC = 2.5 V and ISW = 64 mA, the 74CBTLV3861DK,118 exhibits a typical ON-resistance of 4.2 Ω, as confirmed in Figure 8 of the datasheet. This value remains stable across –40 °C to +85 °C ambient, rising to a max of 15.0 Ω at +125 °C - a key parameter for maintaining signal integrity in thermally demanding 74CBTLV3861DK,118 deployments.