NXP Semiconductors 74LVC623APW,112

Overview

74LVC623APW,112 from NXP Semiconductors is an octal non-inverting 3-state bus transceiver with dual active-low enable inputs (OEAB and OEBA), supporting asynchronous bidirectional data flow between two 8-bit buses. It operates from 1.2 V to 3.6 V supply, tolerates 5.5 V on outputs when disabled, and functions across −40 °C to +125 °C - enabling use in mixed-voltage industrial control backplanes.

For engineers reviewing the 74LVC623APW,112 datasheet, 74LVC623APW,112 pinout, 74LVC623APW,112 application, or 74LVC623APW,112 equivalent, key selection criteria include dual-enable bus isolation capability, 5 V-tolerant I/O for legacy interface bridging, propagation delay under 6.5 ns at 3.3 V, and TSSOP20 packaging for high-density PCB layouts.

Technical Context

The 74LVC623APW,112 implements a dual-control logic architecture where OEAB enables A→B transmission and OEBA enables B→A transmission; simultaneous assertion of both enables transparent latching mode, holding bus states at high-impedance isolation. Its CMOS design ensures rail-to-rail input compatibility (1.2 V–5.5 V) and low static current (≤40 µA at 3.6 V).

Dynamic performance is voltage-scaled: propagation delay tightens from 13.5 ns at 1.65 V to 5.2 ns at 3.3 V, while enable/disable times remain sub-9 ns across full temperature range. Output skew is guaranteed ≤1.5 ns, supporting synchronous multi-bit transfers in timing-critical data paths.

Key Specifications

Pinout & Package

TSSOP20 package (SOT360-1): plastic thin shrink small outline, 20 leads, 4.4 mm body width, 0.65 mm pitch - optimized for automated assembly and space-constrained PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC823APWR and 74ALVC162245PAG, the 74LVC623APW,112 uniquely combines 1.2 V minimum operation, 5.5 V I/O tolerance, and dual-enable latching - making it the sole option for low-voltage mixed-domain systems requiring deterministic bus state retention.

Availability

74LVC623APW,112 is available at Aetrix Electronics and suitable for industrial automation backplanes, automotive body electronics, FPGA I/O expansion, and legacy system upgrades requiring stable component supply and long-term lifecycle assurance.

Supply support for 74LVC623APW,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

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 74LVC623APW,112 belongs to NXP's LVC (Low-Voltage CMOS) logic family, engineered specifically for low-power, mixed-voltage bus interfacing in space- and energy-constrained embedded systems.

FAQ

What is the minimum supply voltage for reliable operation of the 74LVC623APW,112?

The 74LVC623APW,112 is fully specified down to 1.2 V supply voltage per JEDEC JESD8-7A, enabling use in ultra-low-power applications such as battery-backed sensor nodes. At 1.2 V, propagation delay increases to 19 ns and output drive strength reduces, but all logic functions remain guaranteed across −40 °C to +125 °C.

Can the 74LVC623APW,112 safely interface a 5 V microcontroller with a 3.3 V FPGA?

Yes - the 74LVC623APW,112 accepts 0–5.5 V inputs and outputs up to 5.5 V when disabled, allowing direct connection between 5 V and 3.3 V logic without external level shifters. When enabled, outputs swing rail-to-rail within the V_CC range (1.2–3.6 V), so V_CC must be set to 3.3 V for FPGA compatibility.

How does the dual-enable feature of the 74LVC623APW,112 improve bus arbitration?

The 74LVC623APW,112 uses separate OEAB and OEBA inputs to independently gate A→B and B→A data flow. This allows precise timing control - e.g., disabling OEAB while asserting OEBA isolates bus A from bus B while permitting B→A reads, preventing contention during master/slave handshaking sequences.

What is the maximum data rate supported by the 74LVC623APW,112 in a 3.3 V system?

With a maximum propagation delay of 5.2 ns and enable/disable times under 8.5 ns at 3.3 V, the 74LVC623APW,112 supports reliable operation up to 100 MHz bus clock rates. Signal integrity depends on controlled-impedance routing and load capacitance ≤30 pF per line, as validated in the official NXP test circuit (Figure 8).

Does the 74LVC623APW,112 require external pull-up resistors on its enable inputs?

No - OEAB and OEBA are active-low CMOS inputs with ±5 µA max leakage current at 3.6 V. They may be driven directly from FPGA GPIO or microcontroller pins. Pull-ups are unnecessary unless open-drain control logic is used; in standard push-pull configurations, the 74LVC623APW,112 operates reliably with direct logic-level assertion.