NXP Semiconductors 74LVC623APW,118

Overview

74LVC623APW,118 from NXP Semiconductors is an octal non-inverting 3-state bus transceiver with dual active-low enable inputs (OEAB and OEBA), designed for asynchronous bidirectional data transfer between two 8-bit buses. It operates from 1.2 V to 3.6 V, tolerates 5.5 V on outputs when disabled, and supports mixed-voltage interfacing between 3.3 V and 5 V systems in industrial control backplanes.

For engineers reviewing the 74LVC623APW,118 datasheet, 74LVC623APW,118 pinout, 74LVC623APW,118 application, or 74LVC623APW,118 equivalent, key selection criteria include dual-directional 3-state control timing, 5 V-tolerant I/O, wide V_CC range (1.2–3.6 V), propagation delay down to 1.0 ns at 3.3 V, and operation across −40 °C to +125 °C.

Technical Context

The 74LVC623APW,118 implements independent directional control via OEAB (A→B enable) and OEBA (B→A enable), allowing simultaneous bidirectional isolation or latched bus storage when both enables are asserted. Its CMOS input structure ensures TTL-level compatibility and high-impedance shutdown at V_CC = 0 V.

Dynamic performance is characterized by sub-7 ns propagation delay (V_CC = 3.0–3.6 V), enable/disable times under 8.5 ns, and output skew ≤1.5 ns. ESD protection exceeds 2000 V HBM, and it complies with JEDEC standards JESD8-7A, JESD8-5A, and JESD8-C/JESD36 across its operating voltage bands.

Key Specifications

Pinout & Package

TSSOP20 package: plastic thin shrink small outline package, 20 leads, body width 4.4 mm (SOT360-1).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC823APWR and 74ALVC162245DGG, the 74LVC623APW,118 uniquely supports 1.2 V operation and dual-enable latched bus storage - making it optimal for ultra-low-power and state-retentive industrial interface designs where pin count and voltage flexibility are constrained.

Availability

74LVC623APW,118 is available at Aetrix Electronics and suitable for industrial automation backplanes, automotive body control modules, and programmable logic controller I/O expansion requiring stable component supply across extended temperature ranges and mixed-voltage environments.

Supply support for 74LVC623APW,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 company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The 74LVC623APW,118 belongs to NXP's LVC logic family, engineered for low-voltage, high-speed, mixed-signal interfacing in space-constrained and thermally demanding embedded systems.

FAQ

What is the minimum supply voltage for reliable operation of the 74LVC623APW,118?

The 74LVC623APW,118 is fully specified down to 1.2 V V_CC, with functional operation guaranteed across the entire −40 °C to +125 °C temperature range at this voltage. Below 1.2 V, timing and logic thresholds are not characterized, and operation is not assured. The 74LVC623APW,118 achieves usable propagation delay (≤19 ns) even at 1.2 V, supporting ultra-low-power sensor node designs.

Can the 74LVC623APW,118 safely interface a 3.3 V microcontroller with a 5 V peripheral bus?

Yes - the 74LVC623APW,118 supports 5.5 V on outputs when disabled (high-impedance state), and its inputs tolerate up to 5.5 V regardless of V_CC. When V_CC = 3.3 V, the 74LVC623APW,118 drives 3.3 V logic levels onto the 5 V bus while accepting 5 V signals from peripherals, eliminating external level-shifting components in mixed-voltage data paths.

How does the dual-enable latching mode work on the 74LVC623APW,118?

When both OEAB and OEBA are driven LOW simultaneously, the 74LVC623APW,118 enters latched bus storage mode: each output reinforces its corresponding input, holding the last valid logic state on both A[0:7] and B[0:7] buses. This occurs only when all other drivers on both buses are in high-impedance state - enabling transparent data retention without external flip-flops or memory elements.

What is the maximum propagation delay of the 74LVC623APW,118 at 3.3 V supply?

At V_CC = 3.0 V to 3.6 V and −40 °C to +125 °C ambient, the maximum propagation delay (t_pd) of the 74LVC623APW,118 is 6.5 ns for An→Bn or Bn→An paths. This value is measured under worst-case conditions including process variation, temperature extremes, and load capacitance - ensuring timing margin in high-reliability industrial control loops.

Does the 74LVC623APW,118 require external pull-up or pull-down resistors on its enable pins?

No - the 74LVC623APW,118 has no internal pull resistors on OEAB or OEBA; these pins are CMOS inputs with ±5 µA max leakage. External biasing is required only if system-level noise immunity or default state assurance is needed. For fail-safe isolation, tie OEAB and OEBA to V_CC via 10 kΩ resistors; for default-enable behavior, connect to GND through equivalent resistors.