NXP Semiconductors CBTD3384DK,118

Overview

CBTD3384DK,118 from Nexperia is a 10-bit dual-bus level-shifting switch with independent 5-bit output enables, designed for bidirectional 5 V ↔ 3.3 V voltage translation in high-speed digital buses. It features 5 Ω typical ON resistance, IOFF partial power-down support, and operates across -40 °C to +85 °C. Used in mixed-voltage memory and peripheral interconnects where signal integrity and low propagation delay (<0.25 ns) are critical.

For engineers reviewing the CBTD3384DK,118 datasheet, CBTD3384DK,118 pinout, CBTD3384DK,118 application, or CBTD3384DK,118 equivalent, key selection criteria include verified 5 V-to-3.3 V level shifting capability, TSSOP24 package compatibility, IOFF-enabled system power management, and sub-7 ns enable/disable timing under 5 V supply.

Technical Context

The CBTD3384DK,118 implements two independent 5-channel bus switches, each controlled by an active-low output enable (1OE, 2OE). When enabled, it provides low-resistance bidirectional conduction between A-port and B-port pins; when disabled, both ports enter high-impedance state with Cio(off) ≤ 6.0 pF.

Its IOFF circuitry ensures leakage current remains below ±1 μA during partial power-down, and its TTL-compatible inputs accept VIH ≥ 2.0 V and VIL ≤ 0.8 V at 5 V supply-enabling direct interfacing with legacy 5 V logic while driving 3.3 V loads without external biasing.

Key Specifications

Pinout & Package

TSSOP24 package (SOT355-1), 4.4 mm body width, 0.65 mm lead pitch, 1.1 mm max height - compatible with standard surface-mount reflow profiles and automated optical inspection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT3384CPWR and 74LVC4245APW,118, the CBTD3384DK,118 uniquely delivers verified 5 V ↔ 3.3 V bidirectional translation with sub-nanosecond timing and IOFF compliance-making it optimal for mixed-voltage memory and peripheral interconnects where signal integrity and power sequencing safety are jointly critical.

Availability

CBTD3384DK,118 is available at Aetrix Electronics and suitable for industrial PLC backplanes, FPGA I/O expansion modules, and memory interconnect designs requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for CBTD3384DK,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 essential efficiency technologies, delivering high-performance logic, analog, and MOSFET solutions for industrial, automotive, and computing markets.

The CBTD3384DK,118 belongs to Nexperia's CBT family of high-speed bus switches, engineered specifically for low-latency, low-power bidirectional level translation in mixed-voltage digital systems.

FAQ

What is the maximum supply voltage rating for CBTD3384DK,118?

The absolute maximum supply voltage (VCC) for CBTD3384DK,118 is +7.0 V, but the recommended operating range is strictly 4.5 V to 5.5 V. Exceeding 5.5 V may compromise timing performance and reliability, and operation above 7.0 V causes permanent damage per IEC 60134 limiting values. Always maintain VCC within 4.5 V–5.5 V for full specification compliance in CBTD3384DK,118 designs.

Does CBTD3384DK,118 support true bidirectional signal flow without direction control?

Yes, CBTD3384DK,118 supports fully bidirectional signal flow on all 10 channels without external direction control. Its passive FET switch architecture allows data to pass equally well from A-port to B-port or B-port to A-port when enabled. This eliminates the need for direction pins or control logic-unlike directional translators-and makes CBTD3384DK,118 ideal for shared-bus applications such as memory data/address lines.

How does the IOFF feature function in CBTD3384DK,118 during partial power-down?

In CBTD3384DK,118, the IOFF circuitry actively isolates both A-port and B-port terminals when VCC = 0 V or is significantly reduced, limiting leakage current to <±1 μA regardless of signal voltages present on either port. This prevents back-powering of unpowered subsystems and satisfies IEC 61000-4-2 system-level ESD immunity requirements. The feature is inherent to the silicon design and requires no external components to operate in CBTD3384DK,118.

Can CBTD3384DK,118 be used for 3.3 V to 5 V level shifting as well as 5 V to 3.3 V?

Yes, CBTD3384DK,118 performs bidirectional level shifting: it translates 5 V signals down to 3.3 V logic levels and 3.3 V signals up to 5 V logic levels simultaneously on the same channel. The device achieves this through its passive switch topology and TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V), making CBTD3384DK,118 suitable for mixed-voltage buses where either side may drive.

What is the thermal performance of CBTD3384DK,118 in continuous operation?

CBTD3384DK,118 is characterized for continuous operation from -40 °C to +85 °C ambient temperature, with no derating required within this range. Its static supply current remains ≤1.5 mA at 5.5 V, and power dissipation stays below 15 mW under typical switching conditions-enabling use in thermally constrained industrial enclosures without forced cooling. Thermal resistance (θJA) for the TSSOP24 package is 120 K/W, consistent with industry-standard JEDEC mounting conditions.