Nexperia USA Inc. CBTD3384DB,118

Overview

CBTD3384DB,118 from Nexperia is a dual 5-pole, single-throw bus switch designed for bidirectional 5 V to 3.3 V level shifting, featuring two active-low output enable inputs (1OE, 2OE), 5 Ω typical ON resistance, IOFF partial power-down support, and operation from –40 °C to +85 °C. It enables isolated control of two independent 5-bit data paths in mixed-voltage memory or peripheral buses.

For engineers reviewing the CBTD3384DB,118 datasheet, CBTD3384DB,118 pinout, CBTD3384DB,118 application, or CBTD3384DB,118 equivalent, key selection criteria include level-shifting capability between 5 V and 3.3 V domains, low propagation delay (<0.25 ns), high ESD robustness (HBM >2000 V), and TSSOP24 package compatibility with dense PCB layouts.

Technical Context

The CBTD3384DB implements two independent 5-channel analog bus switches, each controlled by a dedicated active-low enable input (1OE/2OE). Switch conduction is bidirectional and voltage-agnostic-signals pass unaltered between A and B ports when enabled, with no internal level translation circuitry beyond inherent diode-based clamping for overvoltage protection.

Its IOFF functionality ensures leakage current remains below ±1 μA when VCC = 0 V, enabling safe hot-insertion and partial power-down in multi-rail systems. The device operates with TTL-compatible input thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V) and supports up to 128 mA per channel in the ON state without latch-up (exceeds JESD78 Class II, 100 mA).

Key Specifications

Pinout & Package

TSSOP24 package (SOT355-1), plastic thin shrink small outline, 24-pin, body width 4.4 mm, lead pitch 0.65 mm, maximum height 1.1 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT3384CPWR and 74LVC1G3157GW,125, CBTD3384DB,118 delivers matched TSSOP24 footprint, guaranteed dual 5-bit channel independence, and optimized pin mapping for compact 5 V/3.3 V bus fanout-making it superior for production-level mixed-voltage interface consolidation.

Availability

CBTD3384DB,118 is available at Aetrix Electronics and suitable for industrial control interfaces, memory subsystem isolation, hot-swappable peripheral modules, and dual-bank address/data multiplexing requiring stable component supply and long-term lifecycle assurance.

Supply support for CBTD3384DB,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 global semiconductor expert delivering high-performance, reliable logic, discrete, and MOSFET solutions for automotive, industrial, and consumer applications.

CBTD3384DB,118 belongs to Nexperia's CBT family of high-speed CMOS bus switches, engineered specifically for low-latency, bidirectional level shifting in mixed-voltage digital systems with stringent timing and reliability demands.

FAQ

Is CBTD3384DB,118 suitable for 3.3 V to 5 V level shifting?

Yes-CBTD3384DB,118 supports bidirectional signal flow, meaning it shifts signals from 3.3 V to 5 V as well as 5 V to 3.3 V. Its passive FET switch architecture imposes no directionality; voltage translation occurs inherently via the driven port's logic levels, and the device meets TTL input thresholds on both sides.

Does CBTD3384DB,118 require external pull-up or pull-down resistors on OE pins?

No-OE pins are CMOS-compatible with rail-to-rail logic thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V), so they can be driven directly from standard 5 V or 3.3 V GPIO outputs. External resistors are unnecessary unless floating-state prevention is required during power-up sequencing.

Can CBTD3384DB,118 operate with VCC = 3.3 V?

No-CBTD3384DB,118 is specified only for VCC = 4.5 V to 5.5 V. Operation at 3.3 V violates recommended conditions and degrades ON resistance, timing, and noise margins. For 3.3 V–to–1.8 V or 3.3 V–to–2.5 V shifting, consider Nexperia's 74LVC series switches instead.

What is the maximum capacitive load the CBTD3384DB,118 can drive reliably?

The device is characterized with 50 pF load capacitance in dynamic testing (Table 9), and its 5 Ω ON resistance combined with typical off-state capacitance of 6.0 pF ensures stable operation up to 100 MHz with ≤10 pF trace + load. For >50 pF loads, propagation delay increases linearly per RC time constant but remains functional within datasheet limits.