Texas Instruments 76010012A

Overview

76010012A from National Semiconductor is a TTL-compatible 8-to-1 data selector/multiplexer with complementary Y (true) and W (inverted) outputs, 12.5 ns typical propagation delay from data input to W output, 30 mW typical power dissipation, and operation over 0°C to +70°C. It serves as a parallel-to-serial converter in digital control logic for industrial PLC I/O modules.

For engineers reviewing the 76010012A datasheet, 76010012A pinout, 76010012A application, or 76010012A equivalent, key selection criteria include strobe-enabled enable logic, complementary output drive capability, LS-family DC/AC characteristics, and compatibility with legacy 74LS-series bus architectures.

Technical Context

The 76010012A implements full on-chip decoding for 3-bit address inputs (A, B, C) to select one of eight data lines (D0–D7). Its active-low strobe (S) enables multiplexing only when low; high strobe forces Y = low and W = high regardless of select inputs.

It features complementary TTL outputs with guaranteed VOH ≥ 2.7 V and VOL ≤ 0.5 V at VCC = 5 V, IOH = –0.4 mA, and IOL = 8 mA. Propagation delays are specified across three input paths: select inputs (3-level or 4-level), strobe, and data inputs - all measured under CL = 15 pF and RL = 2 kΩ.

Key Specifications

Pinout & Package

76010012A is supplied in a 16-lead molded dual-in-line package (DIP), NS package number N16E, with 0.3-inch body width and standard 0.1-inch pin pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar data selector/multiplexer applications.

Compared with SN74LS151N and MC74LS151NG, the 76010012A provides identical multiplexing functionality and timing behavior but retains original National Semiconductor traceability and documentation lineage - critical for legacy system maintenance and audit compliance.

Availability

76010012A is available at Aetrix Electronics and suitable for industrial PLC I/O multiplexing, digital test equipment signal routing, and legacy bus interface logic requiring stable component supply and long-term obsolescence management.

Supply support for 76010012A 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

National Semiconductor was a U.S.-based semiconductor company specializing in analog and logic ICs before its acquisition by Texas Instruments in 2011. Its legacy logic families remain industry benchmarks for reliability and interoperability.

The 76010012A belongs to the 74LS logic family, designed specifically for high-speed, low-power TTL-compatible digital control systems in industrial automation, instrumentation, and computer peripherals.

FAQ

What is the function of the strobe input (Pin 1) on the 76010012A?

The strobe input (S) on the 76010012A is an active-low enable signal. When S is high, the device is disabled: Y is forced low and W is forced high regardless of address or data inputs. Only when S is low does the 76010012A perform normal 8-to-1 selection. This allows precise timing control and synchronization across multiple 76010012A devices in larger logic systems.

Does the 76010012A support both true and inverted outputs simultaneously?

Yes, the 76010012A provides simultaneous true (Y) and inverted (W) outputs. These are complementary - when Y outputs the selected D-input value, W outputs its logical inverse. No external inverter is needed, making the 76010012A ideal for applications requiring both polarities, such as differential bus drivers or dual-edge clocked logic stages.

What is the maximum operating frequency supported by the 76010012A?

The 76010012A does not specify a maximum clock frequency, but its worst-case propagation delay (e.g., 46 ns from select input to Y output at CL = 15 pF) implies reliable operation up to approximately 20 MHz in well-designed TTL systems. System-level timing must account for setup/hold times of driving and receiving devices, as the 76010012A itself is purely combinatorial.

Is the 76010012A compatible with 5 V CMOS logic inputs?

The 76010012A accepts CMOS-level inputs only if they meet TTL input thresholds: VIH ≥ 2.0 V and VIL ≤ 0.8 V. Standard 5 V CMOS outputs (VOH ≈ 4.95 V, VOL ≈ 0.1 V) are compatible, but 74HC- or 74ACT-series CMOS may require series resistors or level translators if driven directly from low-current sources due to input current limits (IIL = –0.4 mA max).

Can the 76010012A be used to implement arbitrary 3-variable Boolean functions?

Yes, the 76010012A can synthesize any 3-variable Boolean function by assigning minterm values (0 or 1) to D0–D7 according to the function's truth table, with A, B, C as variable inputs. This eliminates discrete gate arrays in fixed-function logic designs and is explicitly cited in the original National Semiconductor documentation as a core application of the 76010012A.