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Home > Products > Integrated Circuits (ICs) > Logic > Flip Flops

Texas Instruments 84073012A

Name: 84073012A
Brand: Texas Instruments
SKU: 84073012A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 84073012A

Manufacturer:: Texas Instruments

Category:: Flip Flops

Package:: -

Datasheet:: 84073012A.pdf

Description:: SN54HC174 HEX D-TYPE FLIP-FLOPS

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Product details

Overview

84073012A from Texas Instruments is a military-grade, positive-edge-triggered hex D-type flip-flop with asynchronous clear (CLR), operating across −55°C to 125°C. It features six independent flip-flops in a 20-pin LCCC package, 2 V–6 V supply range, ±4-mA output drive at 5 V, and typical propagation delay of 14 ns. It serves as a synchronous storage register in radiation-tolerant avionics timing and control systems.

For engineers reviewing the 84073012A datasheet, 84073012A pinout, 84073012A application, or 84073012A equivalent, key selection criteria include its extended temperature rating, LCCC hermetic packaging, direct-clear functionality, and compatibility with HC logic families in high-reliability digital state-holding circuits.

Technical Context

The 84073012A implements six identical edge-triggered D flip-flops sharing a common clock (CLK) and asynchronous clear (CLR) input. Each stage transfers data from D to Q on the rising edge of CLK while CLR forces Q low independently of CLK timing.

It uses silicon-gate CMOS technology for low power consumption (80 µA max ICC) and high noise immunity, with input thresholds referenced to VCC (VIH = 3.15 V min at 4.5 V, VIL = 1.35 V max at 4.5 V) and rail-to-rail output swing under load.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	2 V to 6 V - supports mixed-voltage system interfacing and battery-backed operation down to 2 V.
Propagation Delay (tpd)	Typical 14 ns at VCC = 5 V - enables reliable operation up to 25 MHz clock frequency in synchronous logic designs.
Output Drive Strength	±4 mA at VCC = 5 V - sufficient to directly drive 10 LSTTL loads without buffering in legacy interface applications.
Input Leakage Current	1 µA max - ensures minimal loading on upstream logic and stable operation with high-impedance or slow-slew sources.
Operating Temperature	−55°C to +125°C - qualified for aerospace, defense, and downhole industrial environments requiring extreme thermal resilience.
Package Type	LCCC (FK) - 20-pin ceramic leadless chip carrier with hermetic seal, suitable for high-reliability, low-outgassing assemblies.

Pinout & Package

84073012A is housed in a 20-pin Leadless Chip Carrier (LCCC, FK package), featuring a square ceramic body with metallized perimeter terminations and no external leads. The package is hermetically sealed and designed for surface-mount soldering onto land-grid arrays with controlled thermal profiles.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4, 5, 6	Q1–Q6 outputs	True outputs of six D flip-flops; driven high/low actively; require external pull-ups only if interfacing with open-drain logic.
7, 8, 9, 10, 11, 12	D1–D6 inputs	Data inputs synchronized to CLK↑; must be stable for ≥20 ns before clock edge at VCC = 4.5 V.
13	CLK	Common clock input for all six flip-flops; positive-edge sensitive; threshold centered at ~50% VCC.
14	CLR	Asynchronous active-low clear; forces all Q outputs low regardless of CLK state; requires ≥17 ns minimum pulse width.
15–20	VCC, GND, NC	Pins 15 & 20: VCC; Pins 16 & 19: GND; Pins 17 & 18: No internal connection - used for mechanical stability and thermal dissipation.

Key Features

Feature	Design Value
Wide Supply Range	2 V–6 V operation enables interoperability with 3.3 V and 5 V logic families and tolerance to voltage droop in mission-critical power domains.
Low Power Consumption	80 µA maximum ICC allows integration into power-constrained subsystems such as satellite telemetry modules without thermal derating.
High Noise Immunity	Input thresholds scale with VCC (VIH/VIL = 70%/30% of VCC), providing consistent noise margin across full supply range.
Direct Clear Functionality	Asynchronous CLR resets all six registers simultaneously - essential for deterministic initialization in fault-tolerant control sequencers.
LCCC Hermetic Packaging	20-pin FK package meets MIL-STD-883 requirements for moisture resistance, thermal cycling, and long-term reliability in harsh environments.

Applications

Avionics Flight Control Logic	Secure Communication Synchronization
Use Scenario: Storing command latch states in triple-modular-redundant (TMR) flight computer channels during real-time actuator sequencing. IC Role / Device Role / Timing Role: Hex D flip-flop acting as synchronized register bank holding validated control words prior to PWM generation. Use Value: −55°C to +125°C rating and LCCC packaging ensure uninterrupted operation during rapid cabin depressurization and thermal shock events.	Use Scenario: Aligning encrypted data frames across multiple crypto engine lanes using a common clock domain. IC Role / Device Role / Timing Role: Edge-triggered storage element capturing parallel cipher block outputs for time-aligned transmission. Use Value: 14 ns tpd and 25 MHz fmax support deterministic latency budgets required by AES-GCM timing-critical protocols.
Spacecraft Onboard Telemetry Buffering	Nuclear Instrumentation Signal Conditioning
Use Scenario: Holding sensor acquisition snapshots between downlink windows in low-power orbital payload subsystems. IC Role / Device Role / Timing Role: Low-leakage (1 µA max II) register preserving analog-to-digital conversion results during sleep cycles. Use Value: 80 µA max ICC extends battery life in unattended deep-space probes where replacement is impossible.	Use Scenario: Capturing neutron detector pulse counts in reactor protection systems requiring fail-safe reset capability. IC Role / Device Role / Timing Role: Asynchronous CLR-enabled latch ensuring immediate zero-reset upon scram signal assertion. Use Value: Direct-clear function guarantees sub-20 ns reset response - critical for meeting IEC 61508 SIL-3 reaction time requirements.

Avionics Flight Control Logic

Secure Communication Synchronization

Use Scenario: Storing command latch states in triple-modular-redundant (TMR) flight computer channels during real-time actuator sequencing.

IC Role / Device Role / Timing Role: Hex D flip-flop acting as synchronized register bank holding validated control words prior to PWM generation.

Use Value: −55°C to +125°C rating and LCCC packaging ensure uninterrupted operation during rapid cabin depressurization and thermal shock events.

Use Scenario: Aligning encrypted data frames across multiple crypto engine lanes using a common clock domain.

IC Role / Device Role / Timing Role: Edge-triggered storage element capturing parallel cipher block outputs for time-aligned transmission.

Use Value: 14 ns tpd and 25 MHz fmax support deterministic latency budgets required by AES-GCM timing-critical protocols.

Spacecraft Onboard Telemetry Buffering

Nuclear Instrumentation Signal Conditioning

Use Scenario: Holding sensor acquisition snapshots between downlink windows in low-power orbital payload subsystems.

IC Role / Device Role / Timing Role: Low-leakage (1 µA max II) register preserving analog-to-digital conversion results during sleep cycles.

Use Value: 80 µA max ICC extends battery life in unattended deep-space probes where replacement is impossible.

Use Scenario: Capturing neutron detector pulse counts in reactor protection systems requiring fail-safe reset capability.

IC Role / Device Role / Timing Role: Asynchronous CLR-enabled latch ensuring immediate zero-reset upon scram signal assertion.

Use Value: Direct-clear function guarantees sub-20 ns reset response - critical for meeting IEC 61508 SIL-3 reaction time requirements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SNJ54HC174J	Same die, CDIP-16 package with through-hole leads; higher θJA (67°C/W vs. LCCC's ~40°C/W); no hermetic seal.	Suitable for lab prototypes and non-hermetic chassis-mounted military systems; not rated for vacuum or high-humidity deployment.	Select SNJ54HC174J only when board-level reworkability and socket compatibility outweigh environmental sealing needs.
SNJ54HC174W	Same die, CFP-16 package; metal-can construction offers EMI shielding but larger footprint; thermal impedance ~55°C/W.	Preferred in RF-noise-sensitive instrumentation where metallic shielding reduces coupling into adjacent analog circuitry.	Choose SNJ54HC174W when electromagnetic compatibility in mixed-signal enclosures is prioritized over size or weight constraints.

Compared with SNJ54HC174J and SNJ54HC174W, 84073012A provides superior thermal performance and hermetic reliability in space-constrained, high-vacuum, or thermally cycled deployments - making it the sole choice for LCCC-requiring qualification programs.

Availability

84073012A is available at Aetrix Electronics and suitable for avionics flight control, secure communications synchronization, spacecraft telemetry buffering, and nuclear instrumentation signal conditioning requiring stable component supply across extended temperature and long-lifecycle programs.

Supply support for 84073012A 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 manufacturer founded in 1930, specializing in analog, embedded processing, and high-reliability logic solutions for industrial, automotive, aerospace, and defense markets.

The 84073012A belongs to TI's military-grade HC logic family, engineered specifically for applications demanding extended temperature operation, radiation tolerance, and long-term supply assurance in mission-critical systems.

FAQ

What is the absolute maximum supply voltage for the 84073012A?

The absolute maximum supply voltage for the 84073012A is 7 V. Exceeding this rating - even momentarily - may cause permanent damage. Recommended operation remains within 2 V to 6 V per the datasheet's "recommended operating conditions" table. Always observe this limit during power-up sequencing and transient events in the 84073012A's application environment.

Does the 84073012A support hot insertion or live swapping?

No, the 84073012A does not support hot insertion. Its absolute maximum ratings specify that VI must remain within 0 to VCC at all times; applying VCC before or after input signals violates this condition and risks latch-up or parametric shift. System-level hot-swap capability requires external protection circuitry - the 84073012A itself has no built-in hot-swap logic or I/O clamping beyond standard ±20 mA limits.

Is the 84073012A pin-compatible with commercial SN74HC174 variants?

No, the 84073012A is not pin-compatible with commercial SN74HC174 variants. It uses a 20-pin LCCC (FK) package, whereas SN74HC174 parts use 16-pin packages (SOIC-D, PDIP-N, TSSOP-PW, etc.). Pin count, layout, and terminal configuration differ fundamentally - PCB redesign is required to substitute 84073012A for any 16-pin variant, including SN74HC174N or SN74HC174PWR.

What is the minimum pulse width required on the CLR input of the 84073012A?

The minimum low pulse width required on the CLR input of the 84073012A is 14 ns at VCC = 6 V, 16 ns at VCC = 4.5 V, and 20 ns at VCC = 2 V. This specification ensures reliable asynchronous reset across the full operating voltage and temperature range. Driving CLR with shorter pulses may result in incomplete or metastable clearing of the 84073012A's internal flip-flop states.

Can the 84073012A drive standard TTL loads directly?

Yes, the 84073012A can drive up to 10 LSTTL loads directly. Its output drive strength is specified as ±4 mA at VCC = 5 V, matching the input current requirements of legacy LSTTL inputs (IIL = −0.4 mA, IIH = 20 µA). This eliminates need for level-shifting buffers in mixed-logic systems - a key design advantage confirmed in the 84073012A's functional description and electrical characteristics tables.

84073012A Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

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Packaging:: Bulk

Product Status:: Active

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Max Propagation Delay @ V, Max CL:: -

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84073012A FAQ

1.How can I place an order for 84073012A through Aetrix?

Please submit a Request for Quotation (RFQ) for 84073012A on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for 84073012A reliable?

The price and inventory of 84073012A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 84073012A is usually 5 days.

3.What payment methods are accepted for 84073012A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 84073012A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 84073012A?

84073012A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 84073012A order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for 84073012A?

For technical support, including 84073012A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 84073012A requirements.

6.How does Aetrix verify that 84073012A is sourced from the original manufacturer or authorized distributors?

All 84073012A products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 84073012A meets industry standards.

7.What is the process for return or replacement of 84073012A?

All 84073012A units undergo pre-shipment inspection (PSI). If there is an issue with 84073012A, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The 84073012A part is unused and in its original packaging.

Return procedure for 84073012A:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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