Renesas 74HC51FP-E

Overview

74HC51FP-E from Renesas Electronics is a dual-function CMOS logic gate combining two independent AND-OR-INVERT (AOI) structures: one 2-wide 3-input AOI (1Y = (1A·1B·1C) + (1D·1E·1F)) and one 2-wide 2-input AOI (2Y = (2A·2B) + (2C·2D)). It operates across 2–6 V supply, delivers 10.5 ns typical propagation delay at 50 pF load, and drives up to 10 LSTTL loads - used in digital control logic, address decoding, and bus arbitration circuits.

For engineers reviewing the 74HC51FP-E datasheet, 74HC51FP-E pinout, 74HC51FP-E application, or 74HC51FP-E equivalent, key selection criteria include its dual AOI topology, wide VCC range (2–6 V), guaranteed fanout of 10 LSTTL loads, low static ICC (≤1 µA), and SOP-14 JEITA package compatibility with surface-mount assembly.

Technical Context

The 74HC51FP-E implements two distinct AOI functions in a single 14-pin SOP package: the first output (1Y) combines three-input AND terms OR'd together, while the second (2Y) uses two-input AND terms. Both outputs are inverted, enabling compact implementation of sum-of-products logic without external inverters.

Its HC-series CMOS architecture ensures TTL-compatible input thresholds (VIH ≥ 3.15 V @ VCC = 4.5 V, VIL ≤ 1.35 V), rail-to-rail output swing, and immunity to noise-induced glitches under recommended operating conditions (–40°C to +85°C, VCC = 2–6 V).

Key Specifications

Pinout & Package

74HC51FP-E is housed in a SOP-14 pin JEITA package (PRSP0014DF-B, FP-14DAV), 5.5 mm × 10.06 mm body, 1.27 mm pitch, Ni/Pd/Au plating, lead-free compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar AND-OR-INVERT logic applications.

Compared with SN74HC51N and 74VHC51M, the 74HC51FP-E offers optimal balance of surface-mount compatibility, industrial temperature support, and proven reliability in long-lifecycle industrial designs - especially where JEDEC-compliant SOP-14 footprint and RoHS compliance are mandatory.

Availability

74HC51FP-E is available at Aetrix Electronics and suitable for industrial PLCs, legacy bus interface modules, and power sequencing subsystems requiring stable component supply, long-term lifecycle assurance, and JEITA-standard packaging.

Supply support for 74HC51FP-E 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

Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, and enterprise applications.

The HD74HC51 product line delivers standardized high-speed CMOS logic gates optimized for industrial control, instrumentation, and legacy system upgrades - emphasizing interoperability, long-term availability, and robustness across extended temperature ranges.

FAQ

What logic functions does the 74HC51FP-E implement?

The 74HC51FP-E implements two independent AND-OR-INVERT (AOI) functions: Output 1Y equals the inverted OR of (1A·1B·1C) and (1D·1E·1F); Output 2Y equals the inverted OR of (2A·2B) and (2C·2D). This structure enables efficient realization of sum-of-products Boolean expressions without external inverters, making the 74HC51FP-E ideal for address decoding and control logic consolidation.

Is the 74HC51FP-E pin-compatible with other 74HC51 variants?

No - the 74HC51FP-E uses the SOP-14 JEITA package (PRSP0014DF-B), while the HD74HC51P uses DIP-14 and the HD74HC51RPEL uses SOP-14 JEDEC. Although all share identical pin numbering and logic function, physical dimensions, lead pitch, and mold compound differ. The 74HC51FP-E requires JEITA-compliant footprints and reflow profiles, not interchangeable with DIP or JEDEC-SOP variants without PCB redesign.

What is the maximum operating frequency supported by the 74HC51FP-E?

The 74HC51FP-E does not specify a maximum clock frequency because it is a combinational logic device with no internal clock. Its usable speed depends on propagation delay and system-level timing margins: with 11 ns typical tPLH/tPHL at VCC = 4.5 V and CL = 50 pF, it reliably supports combinatorial paths in systems with ≥20 MHz bus clocks, provided setup/hold times of downstream devices are met. The 74HC51FP-E must be evaluated per-path, not per-clock.

Does the 74HC51FP-E support 3.3 V logic systems?

Yes - the 74HC51FP-E operates over 2.0–6.0 V, with guaranteed VIH ≥ 2.1 V and VIL ≤ 0.9 V at VCC = 3.3 V (per interpolation of datasheet VIH/VIL specs at 2.0 V and 4.5 V). Its outputs swing rail-to-rail, providing full 0–3.3 V logic levels. When driven by 3.3 V microcontrollers, the 74HC51FP-E maintains noise margin >0.7 V and fanout ≥6 LSTTL loads, confirming robust interoperability in mixed-voltage designs.

What is the thermal performance of the 74HC51FP-E in continuous operation?

The 74HC51FP-E has a maximum junction temperature of +125°C and thermal resistance θJA ≈ 150°C/W (SOP-14, JEITA, no copper pour). At 25°C ambient and worst-case static ICC = 10 µA (over temperature), power dissipation remains <60 µW - resulting in negligible self-heating. Even under dynamic switching at 10 MHz with 50 pF load, total average power stays below 5 mW, keeping junction temperature within 1°C of ambient. This confirms suitability for sealed industrial enclosures without forced cooling.