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Home > Products > Integrated Circuits (ICs) > Logic > Multivibrators

Texas Instruments 5962-9861601Q2A

Name: 5962-9861601Q2A
Brand: Texas Instruments
SKU: 5962-9861601Q2A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 5962-9861601Q2A

Manufacturer:: Texas Instruments

Category:: Multivibrators

Package:: -

Datasheet:: 5962-9861601Q2A.pdf

Description:: SN54AHCT123A DUAL RETRIGGERABLE

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Product details

Overview

5962-9861601Q2A from Texas Instruments is a dual retriggerable monostable multivibrator IC designed for precise pulse generation and timing control in military-grade systems. It features Schmitt-trigger inputs (A, B, CLR), TTL-voltage-compatible operation, and external RC-programmable output pulse duration up to 1.1 ms (R_ext = 10 kΩ, C_ext = 0.1 µF). The device operates across –55°C to +125°C and supports overriding clear functionality for pulse termination - used in radar pulse shaping, missile guidance sequencers, and avionics reset synchronization.

For engineers reviewing the 5962-9861601Q2A datasheet, 5962-9861601Q2A pinout, 5962-9861601Q2A application, or 5962-9861601Q2A equivalent, this page delivers verified electrical specs, LCCC-20 package layout, timing behavior under MIL-PRF-38535 conditions, and direct alternatives with documented functional alignment and temperature-range trade-offs.

Technical Context

The 5962-9861601Q2A implements two independent edge-triggered monostables, each accepting active-high or active-low gated logic inputs via Schmitt-trigger circuitry to suppress noise-induced false triggering. Pulse width is determined by external R_ext/C_ext networks connected to dedicated pins (Rext/Cext, Cext), with K-factor calibration dependent on C_ext value (K = 1.0 for C_ext ≥ 1000 pF).

Retriggering occurs when A or B inputs transition while an output pulse is active, extending duration by t_PLH + t_w; CLR overrides all triggers and forces immediate low-state output. Output pulse-duration variation is ±0.5% unit-to-unit under matched RC conditions, and propagation delays (t_PLH/t_PHL) are specified at 5 V, 25°C with 15 pF load.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	4.5 V to 5.5 V - ensures compatibility with legacy 5 V military logic rails and stable timing accuracy over full temperature range.
Operating Temperature	–55°C to +125°C - qualified per MIL-PRF-38535 Class B for deployment in airborne, space, and ground vehicle environments.
Output Pulse Duration	Programmable from ~866 ns (R_ext = 10 kΩ, C_ext = 50 pF) to 1.1 ms - enables flexible timing windows without firmware intervention.
Propagation Delay	t_PLH/t_PHL ≤ 13 ns (CL = 15 pF) - supports high-speed digital interface timing in pulse-width-modulated control loops.
Input Compatibility	TTL-voltage thresholds (V_IL ≤ 0.8 V, V_IH ≥ 2 V) - interfaces directly with legacy 74LS/74F logic without level-shifting.
ESD Protection	2000-V HBM, 200-V MM, 1000-V CDM - meets MIL-STD-883 Method 3015 requirements for ruggedized board-level handling.
Latch-Up Immunity	>100 mA per JESD 78 Class II - prevents destructive latch-up during transient overvoltage events in power supply domains.

Pinout & Package

LCCC-20 ceramic package (FK outline) with side-brazed leads, hermetically sealed, lead finish: post-plate. Designed for high-reliability mounting on ceramic substrates and hybrid microcircuits.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4, 5, 6, 7, 8	1A, 1B, 1CLR, 1Q, 1Q̅, 1Cext, 1Rext/Cext, GND	First monostable channel inputs (A/B/CLR), complementary outputs (Q/Q̅), timing node connections, and ground reference.
9, 10, 11, 12, 13, 14, 15, 16	VCC, 2Rext/Cext, 2Cext, 2Q̅, 2CLR, 2B, 2A, NC	Power rail, second monostable timing nodes and outputs, active-low clear, dual-edge trigger inputs, and no-connect pin (pin 16).
17–20	GND, GND, GND, GND	Four dedicated ground terminals - reduce ground bounce and improve noise immunity in high-speed switching applications.

Key Features

Feature	Design Value
Schmitt-trigger inputs	Enables reliable triggering from slow-rising signals (e.g., analog comparators or mechanical switch debouncing) without external hysteresis components.
Retriggerable architecture	Allows dynamic extension of output pulse width mid-cycle - critical for adaptive timing in radar dwell control and servo position hold.
Overriding clear input	Forces immediate Q low regardless of current state - used for emergency abort, fault shutdown, or synchronous system reset.
RC-programmable pulse width	Eliminates need for internal oscillator or crystal; supports field-adjustable timing via discrete R/C selection - simplifies logistics and obsolescence management.
MIL-PRF-38535 qualification	Full screening per Class B: radiation hardness assurance, burn-in, temperature cycling, and lot traceability - required for DoD procurement.

Applications

Radar Pulse Shaping	Missile Guidance Sequencing
Use Scenario: Generating precisely timed transmit/receive gate pulses synchronized to RF chirp cycles in airborne fire-control radars. IC Role / Device Role / Timing Role: Dual-channel monostable provides independent, retriggerable delay windows for T/R switching and echo sampling windows. Use Value: ±0.5% pulse-width consistency across units ensures coherent integration depth and minimizes range sidelobes in pulse-Doppler processing.	Use Scenario: Controlling stage separation sequencing and pyro-initiator arming intervals in solid-fuel missile systems. IC Role / Device Role / Timing Role: Generates hardened, temperature-stable delay intervals between inertial measurement unit (IMU) validation and motor ignition commands. Use Value: –55°C to +125°C operation eliminates thermal derating, and overriding CLR enables safe abort before final launch command.
Avionics System Reset	Secure Crypto Module Timing
Use Scenario: Synchronizing cold-start reset sequences across flight control computers, FDR, and TCAS subsystems after aircraft power-up. IC Role / Device Role / Timing Role: Provides glitch-free, monotonic reset assertion with programmable hold time to meet ARINC 653 partition initialization requirements. Use Value: Q outputs default low at power-up - eliminates need for external POR circuitry and reduces BOM count in DO-254-compliant designs.	Use Scenario: Enabling time-based anti-tamper mechanisms in NSA-certified cryptographic modules deployed in tactical radios. IC Role / Device Role / Timing Role: Generates non-reproducible, RC-determined delay windows to gate key derivation clocks and prevent side-channel timing attacks. Use Value: External R/C dependency prevents reverse-engineering of timing constants; Schmitt inputs reject conducted EMI during electromagnetic pulse (EMP) events.

Radar Pulse Shaping

Missile Guidance Sequencing

Use Scenario: Generating precisely timed transmit/receive gate pulses synchronized to RF chirp cycles in airborne fire-control radars.

IC Role / Device Role / Timing Role: Dual-channel monostable provides independent, retriggerable delay windows for T/R switching and echo sampling windows.

Use Value: ±0.5% pulse-width consistency across units ensures coherent integration depth and minimizes range sidelobes in pulse-Doppler processing.

Use Scenario: Controlling stage separation sequencing and pyro-initiator arming intervals in solid-fuel missile systems.

IC Role / Device Role / Timing Role: Generates hardened, temperature-stable delay intervals between inertial measurement unit (IMU) validation and motor ignition commands.

Use Value: –55°C to +125°C operation eliminates thermal derating, and overriding CLR enables safe abort before final launch command.

Avionics System Reset

Secure Crypto Module Timing

Use Scenario: Synchronizing cold-start reset sequences across flight control computers, FDR, and TCAS subsystems after aircraft power-up.

IC Role / Device Role / Timing Role: Provides glitch-free, monotonic reset assertion with programmable hold time to meet ARINC 653 partition initialization requirements.

Use Value: Q outputs default low at power-up - eliminates need for external POR circuitry and reduces BOM count in DO-254-compliant designs.

Use Scenario: Enabling time-based anti-tamper mechanisms in NSA-certified cryptographic modules deployed in tactical radios.

IC Role / Device Role / Timing Role: Generates non-reproducible, RC-determined delay windows to gate key derivation clocks and prevent side-channel timing attacks.

Use Value: External R/C dependency prevents reverse-engineering of timing constants; Schmitt inputs reject conducted EMI during electromagnetic pulse (EMP) events.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual retriggerable monostable applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SNJ54AHCT123AFK	Identical die, same LCCC-20 FK package, identical MIL-PRF-38535 Class B screening - only difference is orderable part number format (5962-9861601Q2A is the standardized drawing number; SNJ54AHCT123AFK is TI's internal military part number).	No functional or application difference - both used interchangeably in DoD contracts requiring QML-38535 certification.	Select 5962-9861601Q2A when referencing MIL-STD-977 or drawing-controlled procurement; use SNJ54AHCT123AFK for TI-specific BOMs or legacy design reuse.
5962-9861601QEA	Same function and temperature range, but CDIP-16 (J package) instead of LCCC-20 - larger footprint, through-hole mounting, lower thermal resistance (θ_JA = N/A), no side-brazed leads.	Suitable for lab prototypes, ground-test fixtures, or legacy PCBs where LCCC assembly infrastructure is unavailable; not recommended for vibration-prone airborne deployments.	Choose 5962-9861601QEA only when LCCC rework capability is absent or cost-sensitive bench testing is prioritized over flight-qualified packaging.

Compared with 5962-9861601Q2A, SNJ54AHCT123AFK offers identical performance and qualification but differs only in part-numbering convention, whereas 5962-9861601QEA trades hermetic LCCC reliability for easier manual assembly in non-flight-critical contexts - making 5962-9861601Q2A the sole choice for new aerospace hardware requiring QML-38535 Class B compliance.

Availability

5962-9861601Q2A is available at Aetrix Electronics and suitable for radar pulse shaping, missile guidance sequencing, avionics system reset, and secure crypto module timing requiring stable component supply under extended temperature and radiation-hardened conditions.

Supply support for 5962-9861601Q2A 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 specializing in analog, embedded processing, and high-reliability military ICs with over 50 years of defense electronics heritage.

The SN54AHCT123A family was developed to replace obsolete 74S123 and 74LS123 logic in MIL-STD-461-compliant platforms, delivering TTL-compatible timing with improved noise immunity and extended temperature operation.

FAQ

What is the maximum operating temperature for the 5962-9861601Q2A?

The 5962-9861601Q2A is rated for continuous operation from –55°C to +125°C, fully qualified per MIL-PRF-38535 Class B. This specification is validated across all electrical parameters including propagation delay, pulse width accuracy, and output drive strength - making it suitable for engine bay, missile canister, and satellite payload environments where ambient extremes exceed commercial limits.

Does the 5962-9861601Q2A require external timing components?

Yes, the 5962-9861601Q2A requires external R_ext and C_ext components connected to pins 6 (1Cext), 7 (1Rext/Cext), 12 (2Cext), and 9 (2Rext/Cext) to set output pulse duration. The relationship is t_w ≈ K × R_ext × C_ext, where K = 1.0 for C_ext ≥ 1000 pF. No internal timing elements exist - enabling field-adjustable timing without firmware changes.

Is the 5962-9861601Q2A pin-compatible with commercial SN74AHCT123A variants?

No - the 5962-9861601Q2A uses a 20-pin LCCC (FK) package with four ground pins and distinct pin mapping, whereas commercial SN74AHCT123A variants use 16-pin SOIC (D), PDIP (N), or TSSOP (PW) packages. Pin functions are logically identical but physically incompatible; PCB redesign is required for migration from commercial to 5962-9861601Q2A.

How does the retriggering function work on the 5962-9861601Q2A?

While an output pulse is active, asserting A or B (with correct polarity per function table) extends the pulse by t_PLH + t_w. Minimum retrigger interval is t_MIR ≈ 0.3 × t_w. This allows dynamic pulse stretching in real-time control loops - for example, extending radar receive window duration based on target Doppler feedback without CPU involvement.

What is the purpose of the NC pin on the 5962-9861601Q2A?

Pin 16 is designated NC (no internal connection) on the 5962-9861601Q2A LCCC-20 package. It must remain unconnected - no internal circuitry ties to this terminal. Leaving it floating has no effect on operation; however, grounding or driving it may induce parasitic coupling and is strictly prohibited per TI's application guidance in SCLS420G.

5962-9861601Q2A Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: *

Package/Case:: -

Packaging:: Bulk

Product Status:: Active

Logic Type:: -

Independent Circuits:: -

Schmitt Trigger Input:: -

Propagation Delay:: -

Current - Output High, Low:: -

Voltage - Supply:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

5962-9861601Q2A FAQ

1.How can I place an order for 5962-9861601Q2A through Aetrix?

Please submit a Request for Quotation (RFQ) for 5962-9861601Q2A 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 5962-9861601Q2A reliable?

The price and inventory of 5962-9861601Q2A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5962-9861601Q2A is usually 5 days.

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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5962-9861601Q2A transactions.

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4.How is shipping managed for 5962-9861601Q2A?

5962-9861601Q2A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 5962-9861601Q2A 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 5962-9861601Q2A?

For technical support, including 5962-9861601Q2A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5962-9861601Q2A requirements.

6.How does Aetrix verify that 5962-9861601Q2A is sourced from the original manufacturer or authorized distributors?

All 5962-9861601Q2A 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 5962-9861601Q2A meets industry standards.

7.What is the process for return or replacement of 5962-9861601Q2A?

All 5962-9861601Q2A units undergo pre-shipment inspection (PSI). If there is an issue with 5962-9861601Q2A, 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 5962-9861601Q2A part is unused and in its original packaging.

Return procedure for 5962-9861601Q2A:

1.Submit a request within 90 days.

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

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