Texas Instruments SN7486N

Overview

SN7486N from Texas Instruments is a quadruple 2-input exclusive-OR gate IC in a 14-pin PDIP package, operating over 0°C to 70°C, with typical propagation delay of 22 ns at V_CC = 5 V and I_OL = 16 mA, used in digital logic design for parity generation, error detection, and arithmetic circuits.

For engineers reviewing the SN7486N datasheet, SN7486N pinout, SN7486N application, or SN7486N equivalent, this page delivers verified functional identity, confirmed TTL-compatible electrical behavior, validated 14-pin DIP mechanical interface, and real-world substitution guidance for legacy logic system maintenance and redesign.

Technical Context

The SN7486N implements four independent XOR gates using bipolar TTL technology, each with open-collector compatible outputs capable of wired-AND operation and direct interfacing with standard TTL loads. It requires a single +5 V supply and draws up to 24 mA ICC(max) under full load.

Its logic function follows the Boolean expression Y = A ⊕ B per gate, with guaranteed high-level output voltage ≥2.4 V (V_OH) and low-level output voltage ≤0.4 V (V_OL) across temperature and supply variation, meeting original 1972 SDLS124 specification requirements.

Key Specifications

Pinout & Package

SN7486N uses a 14-pin plastic dual in-line package (PDIP), 0.3-inch body width, with standard pin 1 notch marking and 0.1-inch lead pitch. Pin 7 is GND and pin 14 is V_CC.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar XOR gate applications.

Compared with SN7486N, SN74LS86AN offers superior speed and efficiency while maintaining full pin and function compatibility, whereas SN74HC86N introduces voltage flexibility and static power benefits at the cost of TTL input compatibility and requires careful interface validation.

Availability

SN7486N is available at Aetrix Electronics and suitable for legacy system repair, educational lab setups, and industrial controller refurbishment requiring stable component supply and long-term sourcing continuity.

Supply support for SN7486N 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

Texas Instruments is a U.S.-based semiconductor company founded in 1930, specializing in analog, embedded processing, and logic solutions with broad industrial and automotive reach.

The SN7486N belongs to TI's classic 74xx TTL logic family, designed in the early 1970s for general-purpose digital system building blocks in computers, instrumentation, and control equipment.

FAQ

What is the logic function implemented by the SN7486N?

The SN7486N contains four independent 2-input exclusive-OR (XOR) gates, each implementing the Boolean function Y = A ⊕ B. Its truth table yields HIGH output only when inputs differ (A=0,B=1 or A=1,B=0). This behavior is electrically realized using bipolar TTL transistor arrays and is documented in the SDLS124 datasheet revision March 1988. The SN7486N maintains this exact function across its full operating range.

Is the SN7486N pin-compatible with SN74LS86AN?

Yes, the SN7486N and SN74LS86AN share identical 14-pin PDIP packaging, pin assignments, and functional mapping: pins 1–2–3, 4–5–6, 8–9–10, and 11–12–13 correspond to the four XOR gates, with pin 7 as GND and pin 14 as V_CC. Both devices drive the same TTL loads and accept identical input voltage thresholds, enabling direct physical replacement in existing layouts without PCB modification.

Does the SN7486N support wired-AND connections?

Yes, the SN7486N features open-collector outputs, allowing multiple outputs to be tied together with a single pull-up resistor to implement wired-AND logic. This capability is inherent to its internal output stage design and is explicitly supported in the SDLS124 datasheet. When using wired-AND, ensure total sink current remains within the 16 mA per-output limit specified for SN7486N.

What is the maximum operating frequency of the SN7486N in a typical configuration?

The SN7486N does not specify a maximum clock frequency in its datasheet; instead, it specifies propagation delay (22 ns typical at V_CC = 5 V, T_A = 25°C). Based on this, the theoretical maximum toggle rate is approximately 22.7 MHz for a single gate in an unloaded, ideal condition. Real-world frequency limits depend on capacitive loading, supply stability, and fanout - typically 5–10 MHz in practical TTL systems using SN7486N.

Can the SN7486N be used with a 3.3 V supply?

No, the SN7486N is a standard TTL device requiring a nominal 5 V supply (4.75–5.25 V range). Operation at 3.3 V falls outside its specified operating conditions and results in undefined logic thresholds, degraded noise margins, and unreliable output states. For 3.3 V systems, consider logic-level compatible alternatives such as SN74LVC86A or SN74AHC86, not the SN7486N.