Nexperia USA Inc. 74CBTLVD3861PW,118

Overview

74CBTLVD3861PW,118 from Nexperia is a 10-bit 3.3 V to 1.8 V level-translating bus switch with active-low output enable (OE), designed for bidirectional signal routing between mismatched voltage domains in high-speed digital systems. It features 4 Ω typical ON-state resistance, 0.11 ns propagation delay, and IOFF partial power-down support. Used in DDR memory interface buffering and FPGA I/O expansion where low-latency, rail-to-rail pass-through is required.

For engineers reviewing the 74CBTLVD3861PW,118 datasheet, 74CBTLVD3861PW,118 pinout, 74CBTLVD3861PW,118 application, or 74CBTLVD3861PW,118 equivalent, this page delivers verified electrical parameters, TSSOP24 package mapping, functional role in level-shifting buses, and validated alternative parts for voltage translation in mixed-supply SoC interconnects.

Technical Context

This device implements a CMOS-based analog bus switch architecture with Schmitt-triggered OE input, enabling robust operation across full 3.0–3.6 V VCC range despite slow input edges. Its IOFF circuitry actively isolates A/B ports when VCC = 0 V, preventing back-drive current during hot insertion or partial power-down sequences.

The switch operates bidirectionally with no internal direction control - signal flow follows voltage gradient between A and B ports. Pass voltage remains ≤1.85 V at 4 mA load and -40 °C, ensuring reliable 1.8 V logic-level integrity on the B-side while driven from 3.3 V A-side sources.

Key Specifications

Pinout & Package

TSSOP24 (SOT355-1) package: plastic thin shrink small outline, 24-lead, 4.4 mm body width, 0.65 mm lead pitch, 1.1 mm max height. Pin 1 index marked; GND (pin 12) and VCC (pin 24) placed for optimal decoupling layout.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT3861PWR and 74LVC4053BQ, the 74CBTLVD3861PW,118 uniquely combines 10-bit width, 3.3 V → 1.8 V translation, IOFF, and sub-0.2 ns delay - making it the sole fit for high-density, low-latency, mixed-rail digital bus isolation in industrial and compute applications.

Availability

74CBTLVD3861PW,118 is available at Aetrix Electronics and suitable for DDR memory subsystems, FPGA I/O expansion, industrial PLC backplanes, and automotive infotainment subsystems requiring stable component supply across extended temperature ranges.

Supply support for 74CBTLVD3861PW,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 leading semiconductor manufacturer headquartered in Nijmegen, Netherlands, specializing in high-performance logic, analog, and discrete components for industrial, automotive, and consumer markets.

The 74CBTLVD series targets high-speed digital interconnect applications, delivering low-latency, low-power, and robust level-shifting solutions for modern mixed-voltage SoC and FPGA-based systems.

FAQ

Can 74CBTLVD3861PW,118 operate with 2.5 V on the B-side?

No. The device is specified only for 3.3 V ↔ 1.8 V translation. Driving B-side pins with 2.5 V violates the recommended operating conditions and risks exceeding the 1.8 V maximum output voltage limit, potentially damaging downstream 1.8 V receivers. Use only within the documented 1.8 V B-port range.

What is the minimum pull-up resistor value for OE when using 3.3 V VCC?

The minimum OE pull-up resistor is determined by the driver's current-sinking capability. With typical IIH of ±1 μA and VIH(min) = 2.0 V, a 10 kΩ resistor ensures OE remains reliably HIGH while limiting current to <130 μA. Lower values increase noise immunity but raise static power; 4.7 kΩ to 10 kΩ is standard practice.

Does the device support hot-swapping of the B-side while A-side is powered?

Yes. IOFF circuitry actively disables conduction paths when VCC = 0 V, limiting B-side leakage to ±50 μA even with 1.8 V applied. This prevents back-powering of the A-side domain and satisfies JEDEC JESD78B Class I latch-up immunity, enabling safe hot-insertion in modular backplane systems.

Is the 74CBTLVD3861PW,118 pin-compatible with the 74CBTLVD3861BQ variant?

No. PW uses TSSOP24 (SOT355-1) with gull-wing leads; BQ uses DHVQFN24 (SOT815-1) with bottom-exposed thermal pad and no leads. Pin numbering differs: PW pin 1 = n.c., BQ pin 1 = GND. PCB layout, thermal design, and reflow profiles are not interchangeable.