NXP Semiconductors 74LVC623AD,118

Overview

74LVC623AD,118 from NXP Semiconductors is an octal non-inverting 3-state bus transceiver with dual active-low enable inputs (OEAB and OEBA), enabling bidirectional asynchronous data flow between A- and B-buses. It operates from 1.2 V to 3.6 V supply, tolerates 5.5 V on outputs when disabled, and supports −40 °C to +125 °C ambient temperature - ideal for voltage-level translation in mixed-voltage industrial control backplanes.

For engineers reviewing the 74LVC623AD,118 datasheet, 74LVC623AD,118 pinout, 74LVC623AD,118 application, or 74LVC623AD,118 equivalent, this page delivers verified functional behavior, SO20 package layout, JEDEC-compliant voltage thresholds, propagation delay (as low as 1.0 ns at 3.3 V), and real-world isolation capability during power-off or high-impedance states.

Technical Context

The 74LVC623AD,118 implements a dual-enable architecture where simultaneous assertion of OEAB and OEBA places the device in transparent latching mode: both A- and B-bus lines retain their last logic states while isolated from external drivers. Its CMOS input structure accepts 3.3 V or 5 V logic levels, and outputs drive to full rail (VCC) or GND with defined VOH/VOL across load currents up to ±24 mA.

Dynamic performance is characterized across three voltage bands: propagation delay tpd ranges from 1.0–5.2 ns (3.0–3.6 V), enable time ten is 1.0–6.6 ns, and disable time tdis is 1.0–7.0 ns. Input/output capacitance is 4.0 pF (CI) and 10.0 pF (CI/O), supporting high-speed bus switching without excessive loading.

Key Specifications

Pinout & Package

74LVC623AD,118 is housed in a plastic small outline package (SO20) per SOT163-1, with 20 leads, 7.5 mm body width, and 1.27 mm lead pitch. Pin 1 is marked by a notch or dot; the package is RoHS-compliant and halogen-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal transceiver applications.

Compared with SN74LVC823APWR and 74ALVC162245DGGR, the 74LVC623AD,118 uniquely supports 1.2 V operation, offers lower quiescent current, and provides true bidirectional latching via dual enables - making it optimal for compact, low-power, and deterministic bus-isolation designs.

Availability

74LVC623AD,118 is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, test equipment I/O cards, and medical imaging acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVC623AD,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

NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in logic, interface, and power management ICs.

The 74LVC623AD,118 belongs to NXP's LVC (Low-Voltage CMOS) logic family, engineered specifically for robust voltage translation and bus isolation in mixed-supply embedded systems operating across wide temperature and voltage margins.

FAQ

What is the minimum supply voltage supported by the 74LVC623AD,118?

The 74LVC623AD,118 supports a minimum supply voltage of 1.2 V, as specified in Table 5 (Recommended Operating Conditions). This enables reliable operation in ultra-low-power applications such as battery-backed industrial sensors and portable medical devices where brownout resilience is critical. Below 1.2 V, functionality is not guaranteed per the datasheet.

Can the 74LVC623AD,118 interface directly with 5 V logic inputs?

Yes, the 74LVC623AD,118 features 5 V-tolerant inputs - inputs accept voltages up to 5.5 V regardless of VCC level (1.2–3.6 V). This allows direct connection to legacy 5 V TTL or CMOS outputs without external level-shifting components, simplifying design and reducing board area in mixed-voltage systems.

How does the dual-enable function of the 74LVC623AD,118 prevent bus contention?

The 74LVC623AD,118 uses separate OEAB and OEBA controls: only one direction is enabled at a time unless both are asserted simultaneously. When both are LOW, the transceiver enters transparent latching mode - isolating external drivers while holding bus states. This eliminates contention during arbitration or partial system resets, a key advantage over single-enable transceivers.

What is the maximum propagation delay for the 74LVC623AD,118 at 3.3 V?

At VCC = 3.0 V to 3.6 V and −40 °C to +125 °C, the maximum propagation delay (tpd) for the 74LVC623AD,118 is 6.5 ns, as specified in Table 7. This value covers worst-case A→B and B→A paths under full temperature and voltage extremes, ensuring timing predictability in safety-critical industrial control loops.

Is the 74LVC623AD,118 compatible with JEDEC standards for low-voltage logic?

Yes, the 74LVC623AD,118 complies with JEDEC standards JESD8-7A (1.65–1.95 V), JESD8-5A (2.3–2.7 V), and JESD8-C/JESD36 (2.7–3.6 V), as stated in Section 2. This ensures interoperability with other JEDEC-compliant 1.8 V, 2.5 V, and 3.3 V logic families, including those from competing vendors, without signal integrity degradation.