Texas Instruments 78010012A

Overview

78010012A from Texas Instruments is an octal D-type flip-flop with asynchronous clear, implemented in TTL logic, featuring eight independent edge-triggered storage elements, 30 MHz guaranteed clock frequency, 5 V nominal supply voltage, and SOIC-20 package. It serves as a synchronous data latch in digital control registers and bus interface circuits.

For engineers reviewing the 78010012A datasheet, 78010012A pinout, 78010012A application, or 78010012A equivalent, this device is selected for reliable positive-edge-triggered storage in legacy industrial controllers, test equipment timing sequencers, and parallel data buffering where TTL-level compatibility and direct clear functionality are required.

Technical Context

This device implements eight identical D-type flip-flops sharing a common buffered clock (CLK) and active-low asynchronous clear (CLR), each with individual D input and Q output. All inputs meet TTL voltage thresholds (VIH = 2 V min, VIL = 0.8 V max), and outputs drive standard TTL loads (IOL = 16 mA, IOH = –800 µA).

Propagation delays are specified at 17–27 ns (clock-to-Q) and 18–27 ns (clear-to-Q), with setup time of 20 ns and hold time of 5 ns relative to the rising clock edge. Operation is guaranteed from 0 to 30 MHz across 0°C to 70°C ambient, with typical power dissipation of 39 mW per flip-flop.

Key Specifications

Pinout & Package

78010012A is packaged in a 20-pin SOIC (DW package), 7.5 mm wide, with 1.27 mm pitch and gull-wing leads. Pin numbering follows JEDEC MS-013, with Pin 1 in Quadrant 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal D-type flip-flop applications.

Compared with SN74LS273, SN74LS374 lacks asynchronous clear and adds output enable but requires redesign for bus contention management, while SN74ALS273 offers measurable speed and power improvements without layout change - making it the preferred upgrade path where available.

Availability

78010012A is available at Aetrix Electronics and suitable for industrial PLC register banks, test equipment pattern generators, and legacy microprocessor bus interfaces requiring stable component supply across long-lifecycle production programs.

Supply support for 78010012A 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 ICs for industrial, automotive, and communications markets.

The 74LS logic family - including 78010012A - was engineered for robust TTL compatibility, noise immunity, and drop-in replaceability in mid-1980s digital systems, targeting industrial control and instrumentation applications.

FAQ

What is the maximum clock frequency supported by the 78010012A?

The 78010012A guarantees operation up to 30 MHz across its full temperature range (0°C to 70°C), with typical maximum frequency reaching 40 MHz at 25°C. This specification is validated under standard TTL loading conditions (CL = 15 pF, RL = 400 Ω), and the 78010012A maintains timing integrity without external clock conditioning.

Does the 78010012A support asynchronous reset, and how is it implemented?

Yes, the 78010012A features an active-low asynchronous clear (CLR) input on Pin 1 that forces all eight Q outputs low immediately, independent of the clock signal. This function operates across the full supply and temperature range, with a minimum pulse width of 16.5 ns, and is electrically verified per TI SDLS090 datasheet Section 4.

What are the input voltage thresholds for high and low logic levels on the 78010012A?

The 78010012A specifies VIH ≥ 2.0 V (minimum) and VIL ≤ 0.8 V (maximum) for all inputs except CLR, which has identical thresholds. These values ensure compatibility with standard TTL and LS-family logic outputs, and are measured at VCC = 4.75–5.25 V and TA = 0°C to 70°C, as confirmed in the electrical characteristics table of the 78010012A datasheet.

Can the 78010012A be used in place of the SN74273 or SN74LS273?

Yes - the 78010012A is a direct functional and pinout match for SN74LS273 in SOIC-20 (DW) packaging. It shares identical logic behavior, timing parameters, and DC specifications. The 78010012A datasheet cross-references SN74LS273, and both devices use the same DW package drawing and pin numbering, confirming full interchangeability in existing designs.

What is the power consumption of the 78010012A under typical operating conditions?

The 78010012A draws 62–94 mA total supply current (ICC) at VCC = 5.5 V with all outputs open and inputs driven, translating to approximately 39 mW per flip-flop. This value is measured per TI SDLS090 test condition Note 2 and reflects worst-case static + dynamic consumption for eight channels, making it suitable for thermally constrained legacy PCB layouts.