Nexperia USA Inc. CBT16211DL,512

Overview

CBT16211DL,512 from NXP Semiconductors (formerly Philips) is a 24-bit TTL-compatible bus switch organized as dual 12-bit sections with independent output-enable controls. It features 5 Ω on-state resistance, 0.25 ns propagation delay (CL = 50 pF), and operates from –40 °C to +85 °C at 4.5–5.5 V supply. Used in high-speed data path isolation and bus multiplexing in industrial control backplanes.

For engineers reviewing the CBT16211DL,512 datasheet, CBT16211DL,512 pinout, CBT16211DL,512 application, or CBT16211DL,512 equivalent, key selection criteria include dual 12-bit enable independence, sub-nanosecond timing, low on-resistance switching, and SSOP-56 thermal/mechanical compatibility for dense PCB layouts.

Technical Context

The CBT16211DL,512 implements two electrically isolated 12-bit bidirectional bus switches, each controlled by dedicated OE inputs (pins 55 and 56). Switch conduction occurs only when respective OE is logic low, establishing low-impedance paths between A and B ports with no internal level translation.

Its architecture avoids active buffering-signal integrity relies on passive FET-based switching with 4.3 pF input capacitance and 6.9 pF disabled-output capacitance. Timing behavior is dominated by RC delay from 5 Ω r_ON and load capacitance, not gate propagation, enabling deterministic sub-0.3 ns delays under 50 pF loads.

Key Specifications

Pinout & Package

CBT16211DL,512 is housed in a 56-pin plastic shrink small outline package (SSOP), body width 7.5 mm, JEDEC MO-153 compliant (SOT371-1). Pin 1 is NC; pins 55 and 56 are 1OE and 2OE; ground (GND) appears on pins 8, 19, 38, and 49; VCC is on pin 17.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBTD16211DGGR and 74LVC16244APAG, CBT16211DL,512 delivers lowest latency and true bidirectional transparency without direction logic, making it optimal for high-fidelity bus gating where timing determinism and signal integrity are critical.

Availability

CBT16211DL,512 is available at Aetrix Electronics and suitable for industrial backplane multiplexing, PCI bus isolation, and embedded debug interface sharing requiring stable component supply and long-term obsolescence management.

Supply support for CBT16211DL,512 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

NXP Semiconductors is a global semiconductor company formed from the spin-off of Philips' semiconductor division, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The CBT series was developed by Philips specifically for high-speed, low-latency digital signal routing in 5 V systems-prioritizing passive-switch fidelity, minimal propagation delay, and robust latch-up immunity over logic-level translation or drive strength.

FAQ

What is the maximum data rate supported by CBT16211DL,512?

The device supports effective data rates exceeding 1 Gbps in point-to-point configurations due to its 0.25 ns typical propagation delay and 5 Ω on-resistance. Real-world bandwidth is limited by PCB trace impedance and load capacitance; with ≤50 pF total load, clean eye diagrams are maintained up to 800 Mbps NRZ signaling.

Can CBT16211DL,512 be used with 3.3 V logic systems?

No-it is specified only for 4.5–5.5 V operation and requires TTL-compatible input thresholds (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V). Driving OE or data inputs from 3.3 V logic may result in undefined switching behavior or increased ICC; level-shifting circuitry is mandatory for mixed-voltage interfacing.

Does CBT16211DL,512 support hot insertion?

Yes-the device features bus-hold and high-impedance off-state isolation, and its absolute maximum ratings include –0.5 V to +7.0 V on all I/O pins. However, hot-insertion reliability depends on system-level protection (e.g., series resistors, TVS diodes); the part itself meets JESD78 latch-up immunity (>100 mA) under transient stress.

How many ground pins does CBT16211DL,512 have, and why?

It has four dedicated GND pins (8, 19, 38, 49) distributed across the SSOP-56 package to minimize ground loop inductance and suppress simultaneous switching noise. This layout reduces ΔI/Δt-induced voltage spikes during 24-bit parallel switching, preserving signal integrity in high-speed bus applications.