Nexperia USA Inc. CBTD3384D,112

Overview

CBTD3384D,112 from Nexperia is a 10-bit dual 5-channel bus switch IC designed for bidirectional 5 V ↔ 3.3 V level shifting in high-speed digital interfaces. It features two independent active-low output enables (1OE, 2OE), 5 Ω typical ON-resistance, IOFF partial power-down support, and operation from −40 °C to +85 °C. Used in mixed-voltage memory/data buses between legacy 5 V controllers and 3.3 V peripherals.

For engineers reviewing the CBTD3384D,112 datasheet, CBTD3384D,112 pinout, CBTD3384D,112 application, or CBTD3384D,112 equivalent, key selection criteria include bidirectional level-shifting capability, sub-0.25 ns propagation delay, IOFF-enabled system power gating, and TSSOP24 package compatibility with dense PCB layouts.

Technical Context

The CBTD3384D implements two independent 5-pole single-throw analog switches, each controlled by a dedicated active-low enable input (1OE/2OE). Switch conduction is bidirectional with no internal directionality-signal flow depends solely on voltage potential across ports.

It uses MOSFET-based transmission gate architecture with integrated clamping diodes for 5 V → 3.3 V translation. The IOFF circuit ensures leakage current remains below ±1 μA when VCC = 0 V, enabling safe hot-insertion and partial power-down in multi-rail systems.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT3384CPWR and 74LVC4245APW, CBTD3384D,112 uniquely combines true bidirectionality, zero-direction-control overhead, and hardware-enforced IOFF isolation-making it optimal for hot-pluggable, mixed-rail bus arbitration where timing predictability and power-state safety are critical.

Availability

CBTD3384D,112 is available at Aetrix Electronics and suitable for industrial control backplanes, embedded memory interfaces, and FPGA I/O expansion requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for CBTD3384D,112 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 logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.

CBTD3384D,112 belongs to Nexperia's CBT family of high-speed CMOS bus switches, engineered specifically for low-latency, low-power bidirectional voltage translation in mixed-supply digital systems.

FAQ

Can CBTD3384D,112 operate with 3.3 V applied to VCC?

No. CBTD3384D,112 requires VCC = 4.5 V to 5.5 V for proper internal biasing and switch conduction. Applying 3.3 V to VCC violates recommended operating conditions and results in undefined RON, increased propagation delay, and potential failure to enable channels-even if 3.3 V signals are present on A/B ports.

Does CBTD3384D,112 support 5 V tolerant I/O when VCC = 5 V?

Yes. When VCC = 5 V, both A-port and B-port pins tolerate input voltages up to 5.5 V per absolute maximum ratings. The internal clamping diodes and oxide-thickness design allow safe interfacing with 5 V TTL outputs on either side, provided current limits (±128 mA) are observed.

What happens to signal integrity when one OE is HIGH and the other is LOW?

Only the group controlled by the LOW OE remains conductive; the other group enters high-impedance OFF-state (Z). No crosstalk or loading occurs between enabled and disabled groups-the 6.0 pF off-state capacitance isolates inactive channels, preserving rise/fall times on active paths.

Is CBTD3384D,112 pin-compatible with older CBTD3384 variants like CBTD3384DB?

No. CBTD3384D,112 uses SOT355-1 (TSSOP24) packaging, whereas CBTD3384DB used SOT340-1 (SSOP24) with different pin spacing and thermal pad layout. Mechanical and solder-reflow profiles differ; PCB redesign is required for replacement.