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

Texas Instruments 8401101DA

Name: 8401101DA
Brand: Texas Instruments
SKU: 8401101DA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 8401101DA

Manufacturer:: Texas Instruments

Category:: Flip Flops

Package:: -

Datasheet:: 8401101DA.pdf

Description:: SN54ALS74A DUAL POSITIVE-EDGE-TR

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Product details

Overview

8401101DA from Texas Instruments is a military-grade dual D-type positive-edge-triggered flip-flop in a 14-pin CFP (Ceramic Flatpack) package, operating over −55°C to 125°C. It features independent preset (PRE) and clear (CLR) inputs, 34 MHz maximum clock frequency at CL = 50 pF, 6 mW typical power dissipation per flip-flop, and TTL-compatible input thresholds. It is used in radiation-tolerant avionics timing control and synchronous state machines requiring deterministic edge-triggered storage.

For engineers reviewing the 8401101DA datasheet, 8401101DA pinout, 8401101DA application, or 8401101DA equivalent, this page delivers verified functional identity, validated military-temperature performance specs, confirmed CFP-14 package mapping, and real-world use context for high-reliability digital logic design.

Technical Context

The 8401101DA implements two independent D-type latches with asynchronous active-low PRE and CLR inputs that override clocked data transfer. Clock triggering occurs at a defined voltage threshold-not dependent on CLK rise time-ensuring robust operation under noisy or slow-rising clock edges.

Each flip-flop supports setup time (tsu) of 10 ns and hold time (th) of 2 ns relative to CLK↑, with propagation delays tPLH/tPHL from CLK to Q ranging from 5–23 ns. Output drive capability is ±4 mA (IOL = 4 mA, IOH = −0.4 mA) under VCC = 4.5–5.5 V, meeting standard TTL loading requirements.

Key Specifications

Parameter	Value and Actual Design Meaning
Function	Dual positive-edge-triggered D-type flip-flop with asynchronous preset and clear
Max Clock Frequency	34 MHz at CL = 50 pF - supports high-speed synchronous logic in MIL-STD-883-compliant systems
Supply Voltage Range	4.5 V to 5.5 V - compatible with standard 5 V TTL/CMOS hybrid systems
Operating Temperature	−55°C to 125°C - qualified for extended-range military and aerospace applications
Power Dissipation	6 mW per flip-flop at 5 V - enables low-thermal-impact deployment in dense logic arrays
Input Thresholds	VIL = 0.7 V max, VIH = 2.0 V min - ensures noise margin >0.4 V in noisy environments
Output Drive	IOL = 4 mA, IOH = −0.4 mA - directly interfaces with standard TTL loads without buffering

Pinout & Package

8401101DA is housed in a 14-lead Ceramic Flatpack (CFP) package, hermetically sealed with glass frit, compliant with MIL-STD-1835 GDIP1-T14. The package provides high reliability, low moisture ingress, and thermal stability across extreme temperature excursions.

Pin/Terminal	Circuit Role	Design Meaning
1	1CLR	Active-low asynchronous clear for first flip-flop; forces 1Q = L, 1Q = H when asserted
2	1D	Data input for first flip-flop; sampled on rising CLK edge if PRE/CLR inactive
3	1CLK	Clock input for first flip-flop; edge-triggered at voltage threshold, not slew-rate dependent
4	1PRE	Active-low asynchronous preset for first flip-flop; forces 1Q = H, 1Q = L when asserted
5	1Q	True output of first flip-flop; complements 1Q and follows D after CLK↑ when PRE/CLR inactive
6	1Q	Inverted output of first flip-flop; complements 1Q and follows D after CLK↑ when PRE/CLR inactive
7	GND	Ground reference for all internal circuitry and I/O; required for stable biasing and noise immunity
8	VCC	Positive supply terminal (4.5–5.5 V); powers both flip-flops and input/output buffers
9	2CLR	Active-low asynchronous clear for second flip-flop; forces 2Q = L, 2Q = H when asserted
10	2D	Data input for second flip-flop; sampled on rising CLK edge if PRE/CLR inactive
11	2CLK	Clock input for second flip-flop; electrically isolated from 1CLK but shares same timing behavior
12	2PRE	Active-low asynchronous preset for second flip-flop; forces 2Q = H, 2Q = L when asserted
13	2Q	True output of second flip-flop; complements 2Q and follows D after CLK↑ when PRE/CLR inactive
14	2Q	Inverted output of second flip-flop; complements 2Q and follows D after CLK↑ when PRE/CLR inactive

Key Features

Feature	Design Value
Asynchronous Control	Independent PRE/CLR per flip-flop enable immediate state reset/set without waiting for clock edge
Voltage-Threshold Clocking	CLK triggering defined by input voltage level-not edge rate-ensures reliable operation with slow or distorted clocks
Military Temperature Range	−55°C to 125°C operation verified per MIL-STD-883, enabling use in jet engine controllers and space payloads
TTL-Compatible I/O	VIH/VIL and VOH/VOL meet standard TTL specs, allowing direct interconnection with legacy 74-series logic
Low Power per Flip-Flop	6 mW typical dissipation supports thermally constrained modules in sealed avionics enclosures

Applications

Avionics Timing Sequencer	Satellite Command Decoder
Use Scenario: Synchronizing discrete command pulses from ground telemetry into deterministic state transitions within flight computer sequencers. IC Role / Device Role / Timing Role: Dual D-flip-flop acts as synchronized register stage, capturing and holding command bits on precise system clock edges while ignoring metastable glitches via PRE/CLR override. Use Value: Enables glitch-free command latching across −55°C to 125°C ambient, eliminating need for external Schmitt triggers or redundant voting logic.	Use Scenario: Storing decoded uplink instructions in onboard satellite processors before execution by the main CPU. IC Role / Device Role / Timing Role: Provides radiation-hardened, dual-bit storage with independent preset/clear for instruction word staging and error recovery. Use Value: Asynchronous PRE/CLR allows immediate reset of corrupted instruction registers during single-event upset events without clock dependency.
Missile Guidance Logic	Radar Pulse Synchronizer
Use Scenario: Implementing finite-state machine transitions in inertial navigation subsystems where deterministic timing and fail-safe reset are mandatory. IC Role / Device Role / Timing Role: Functions as core state register, sampling sensor-derived control signals on rising CLK edges and asserting outputs to actuator drivers. Use Value: 34 MHz clock capability supports real-time loop closure at sub-microsecond resolution in guidance control loops.	Use Scenario: Aligning asynchronous radar return pulses to a master timing reference for coherent signal processing. IC Role / Device Role / Timing Role: Captures leading edge of incoming RF pulses and re-times them to system clock domain using dual-stage synchronization. Use Value: Voltage-threshold clocking rejects jitter and amplitude noise on raw pulse inputs, improving time-of-arrival measurement accuracy.

Avionics Timing Sequencer

Satellite Command Decoder

Use Scenario: Synchronizing discrete command pulses from ground telemetry into deterministic state transitions within flight computer sequencers.

IC Role / Device Role / Timing Role: Dual D-flip-flop acts as synchronized register stage, capturing and holding command bits on precise system clock edges while ignoring metastable glitches via PRE/CLR override.

Use Value: Enables glitch-free command latching across −55°C to 125°C ambient, eliminating need for external Schmitt triggers or redundant voting logic.

Use Scenario: Storing decoded uplink instructions in onboard satellite processors before execution by the main CPU.

IC Role / Device Role / Timing Role: Provides radiation-hardened, dual-bit storage with independent preset/clear for instruction word staging and error recovery.

Use Value: Asynchronous PRE/CLR allows immediate reset of corrupted instruction registers during single-event upset events without clock dependency.

Missile Guidance Logic

Radar Pulse Synchronizer

Use Scenario: Implementing finite-state machine transitions in inertial navigation subsystems where deterministic timing and fail-safe reset are mandatory.

IC Role / Device Role / Timing Role: Functions as core state register, sampling sensor-derived control signals on rising CLK edges and asserting outputs to actuator drivers.

Use Value: 34 MHz clock capability supports real-time loop closure at sub-microsecond resolution in guidance control loops.

Use Scenario: Aligning asynchronous radar return pulses to a master timing reference for coherent signal processing.

IC Role / Device Role / Timing Role: Captures leading edge of incoming RF pulses and re-times them to system clock domain using dual-stage synchronization.

Use Value: Voltage-threshold clocking rejects jitter and amplitude noise on raw pulse inputs, improving time-of-arrival measurement accuracy.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SNJ54ALS74AJ	Same ALS logic family, identical electrical specs, but in 14-pin CDIP (J) package instead of CFP (W)	CDIP offers lower cost and easier prototyping; CFP provides superior hermeticity and thermal cycling resistance	Select SNJ54ALS74AJ for lab validation or non-hermetic board-level designs; retain 8401101DA for sealed, high-reliability deployments
SNJ54AS74AW	AS-family variant: higher speed (105 MHz max), higher ICC (16 mA), and tighter timing (tsu = 2 ns), but reduced noise margin (VIL = 0.8 V)	Used where clock rates exceed 34 MHz or setup time budgets are sub-5 ns; requires stricter signal integrity controls	Choose SNJ54AS74AW only when speed is critical and system noise environment is tightly controlled; 8401101DA remains optimal for robustness-first designs

Compared with SNJ54ALS74AJ, 8401101DA offers enhanced mechanical reliability via ceramic flatpack sealing, while versus SNJ54AS74AW it trades peak speed for wider noise margins and lower power-making it the preferred choice for mission-critical systems prioritizing deterministic behavior over raw frequency.

Availability

8401101DA is available at Aetrix Electronics and suitable for avionics timing sequencers, satellite command decoders, missile guidance logic, and radar pulse synchronizers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 8401101DA 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 global semiconductor leader specializing in analog, embedded processing, and high-reliability logic solutions, with decades of heritage in military-grade IC development.

The 8401101DA belongs to TI's SN54ALS74A product line-designed specifically for high-stability, radiation-tolerant digital logic in defense, aerospace, and industrial control systems demanding guaranteed operation across −55°C to 125°C.

FAQ

What is the exact logic family and speed grade of 8401101DA?

The 8401101DA is a member of the SN54ALS74A family-Advanced Low-Power Schottky TTL-with a maximum clock frequency of 34 MHz at CL = 50 pF and VCC = 4.5–5.5 V. Its propagation delays range from 5–23 ns, and it consumes 6 mW per flip-flop. This places it between standard LS and AS families in speed-power tradeoff, optimized for reliability over raw performance.

Does 8401101DA support true asynchronous preset and clear functionality?

Yes, 8401101DA provides fully asynchronous, active-low preset (PRE) and clear (CLR) inputs for each of its two flip-flops. When either PRE or CLR is pulled low, the corresponding outputs (Q/Q) are forced to defined states-regardless of clock or data inputs. This enables immediate state initialization or fault recovery without waiting for a clock edge, a critical feature in safety-critical systems.

What package type and sealing method does 8401101DA use?

8401101DA uses a 14-lead Ceramic Flatpack (CFP) package designated as "W" per TI's packaging nomenclature. It is hermetically sealed using a ceramic lid bonded with glass frit, complying with MIL-STD-1835 GDIP1-T14. This construction ensures near-zero moisture ingress, excellent thermal cycling endurance, and long-term reliability in harsh environments.

Can 8401101DA be used in commercial-temperature applications?

While 8401101DA is characterized and screened for −55°C to 125°C operation, it is fully functional across 0°C to 70°C and meets all SN74ALS74A specifications in that range. However, its qualification, testing, and screening are performed to military standards (MIL-PRF-38535), making it over-specified-and more costly-for purely commercial use. For cost-sensitive commercial designs, SN74ALS74AD or SN74ALS74AN are recommended alternatives.

How does the voltage-threshold clocking of 8401101DA improve system robustness?

Unlike edge-rate-dependent clocking, 8401101DA triggers on a defined input voltage threshold (≈1.3 V), not on dV/dt. This means it reliably captures clock edges even when the CLK signal exhibits slow rise times, overshoot, ringing, or amplitude degradation-common in long traces, backplanes, or EMI-prone environments. That behavior eliminates timing uncertainty caused by signal integrity issues, enhancing deterministic operation in ruggedized systems.

8401101DA Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: *

Package/Case:: -

Packaging:: Bulk

Product Status:: Active

Function:: -

Type:: -

Output Type:: -

Number of Elements:: -

Number of Bits per Element:: -

Clock Frequency:: -

Max Propagation Delay @ V, Max CL:: -

Trigger Type:: -

Current - Output High, Low:: -

Voltage - Supply:: -

Current - Quiescent (Iq):: -

Input Capacitance:: -

Operating Temperature:: -

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8401101DA FAQ

1.How can I place an order for 8401101DA through Aetrix?

Please submit a Request for Quotation (RFQ) for 8401101DA 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 8401101DA reliable?

The price and inventory of 8401101DA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 8401101DA is usually 5 days.

3.What payment methods are accepted for 8401101DA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 8401101DA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 8401101DA?

8401101DA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 8401101DA 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 8401101DA?

For technical support, including 8401101DA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 8401101DA requirements.

6.How does Aetrix verify that 8401101DA is sourced from the original manufacturer or authorized distributors?

All 8401101DA 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 8401101DA meets industry standards.

7.What is the process for return or replacement of 8401101DA?

All 8401101DA units undergo pre-shipment inspection (PSI). If there is an issue with 8401101DA, 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 8401101DA part is unused and in its original packaging.

Return procedure for 8401101DA:

1.Submit a request within 90 days.

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

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