NXP Semiconductors N74F827D,602

Overview

N74F827D,602 from Philips Semiconductors is a 10-bit non-inverting 3-state buffer/line driver in SO24 package, delivering 6.0 ns typical propagation delay, ±24 mA high-level and 64 mA low-level output drive, and 20 µA input loading - designed for high-speed bus interfacing in microprocessor data/address paths with flow-through pinout.

For engineers reviewing the N74F827D,602 datasheet, N74F827D,602 pinout, N74F827D,602 application, or N74F827D,602 equivalent, key selection criteria include 3-state enable timing (tPZH/tPHZ ≤ 14.0 ns), dual active-low OE inputs (OE0/OE1), 5 V operation with 0 °C to +70 °C commercial range, and SO24 package compatibility with board-level signal integrity requirements.

Technical Context

The N74F827D,602 implements a NOR-gated 3-state control architecture with two independent active-low output enables (OE0, OE1), allowing flexible bus partitioning. Its flow-through pinout places inputs on one side (pins 1–11) and outputs on the opposite side (pins 13–23), minimizing trace crossovers in dense PCB layouts.

Each of the ten Dn→Qn channels operates with non-inverting logic and exhibits controlled rise/fall times to suppress ground bounce. Glitch-free power-up behavior ensures outputs remain in high-impedance state until VCC stabilizes, preventing bus contention during system initialization.

Key Specifications

Pinout & Package

Package: SO24 - plastic small outline package, 24 leads, 7.5 mm body width, gull-wing leads, JEDEC MS-013 compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 10-bit non-inverting 3-state buffer applications.

Compared with SN74F827N and 74ACT827SO, the N74F827D,602 offers optimal balance of high drive (64 mA), moderate power (60 mA ICC), and SO24 surface-mount compatibility - making it preferred for space-constrained, high-current bus interface designs requiring proven FAST logic performance.

Availability

N74F827D,602 is available at Aetrix Electronics and suitable for microprocessor bus interfacing, memory address latching, parity path buffering, and industrial backplane signal conditioning requiring stable component supply and long-term obsolescence management.

Supply support for N74F827D,602 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

Philips Semiconductors (now NXP Semiconductors) is a global semiconductor innovator founded in the Netherlands, specializing in logic, analog, and interface ICs for industrial, computing, and communications systems.

The 74F FAST logic family - including the N74F827D,602 - was engineered for high-speed, low-loading bus interface applications in 1980s–1990s microprocessor systems, emphasizing propagation speed, fan-in scalability, and robust 3-state control.

FAQ

What is the function of pins OE0 and OE1 on the N74F827D,602?

Pins OE0 and OE1 are active-low output enable inputs with NOR logic gating: both must be LOW to enable the Q0–Q9 outputs. If either is HIGH, all outputs enter high-impedance state. This dual-OE architecture allows hierarchical bus control - for example, OE0 may be tied to a system-level chip select while OE1 responds to local peripheral readiness. The N74F827D,602 datasheet confirms this behavior in the Function Table on page 3.

Does the N74F827D,602 support hot insertion or live bus swapping?

The N74F827D,602 does not include explicit hot-swap protection circuitry such as slew-rate limiting or undervoltage lockout. However, its glitch-free power-up feature ensures outputs remain in high-impedance state until VCC stabilizes, reducing risk during insertion. For true hot-swap compliance, external current-limiting resistors and sequencing controllers are required. The N74F827D,602 specification sheet (page 3) states "Glitch free power-up in 3-State" but does not guarantee safe live insertion under load.

What is the maximum capacitive load the N74F827D,602 can drive while maintaining 6.0 ns propagation delay?

The 6.0 ns typical propagation delay for the N74F827D,602 is specified at CL = 50 pF and RL = 500 Ω. At CL = 300 pF (per AC Characteristics table on page 6), typical delay increases to 9.5 ns for single-output switching and 12.0 ns for 10-output switching. Therefore, to maintain ≤6.0 ns delay, the total load - including trace, connector, and input capacitance - must stay below 50 pF. The N74F827D,602 datasheet explicitly ties delay values to defined test conditions.

Can the N74F827D,602 be used with 3.3 V logic systems?

No - the N74F827D,602 is rated for 4.5 V to 5.5 V supply only (see Recommended Operating Conditions, page 4). Applying 3.3 V violates minimum VCC specification and results in undefined output levels, increased propagation delay, and potential failure to meet VIH/VIL thresholds. For 3.3 V systems, consider pin-compatible alternatives like 74LVC827 or 74ALVC827. The N74F827D,602 absolute maximum ratings confirm VCC must exceed 4.5 V for guaranteed operation.

How does the input loading of the N74F827D,602 compare to standard FAST logic?

The N74F827D,602 features high-impedance NPN base inputs drawing only ±20 µA in HIGH/LOW states - a 30× reduction versus the FAST family standard of ±600 µA. This enables >30-unit-load fan-in without degrading signal integrity or increasing bus settling time. The N74F827D,602 datasheet highlights this in the FEATURES section (page 2) and quantifies it in the Input Loading Table (page 2).