Texas Instruments SNJ54H87J

Overview

SNJ54H87J from Rochester Electronics is a military-grade, radiation-tolerant octal D-type flip-flop with complementary outputs, 20 ns propagation delay (t_pd), ±20 mA output drive, and operation across –55°C to +125°C. It serves as a synchronous edge-triggered storage element in hardened digital logic systems, including missile guidance interface modules and satellite command decoders.

For engineers reviewing the SNJ54H87J datasheet, SNJ54H87J pinout, SNJ54H87J application, or SNJ54H87J equivalent, key selection criteria include its Class V Space Level qualification, QML-35835 compliance, guaranteed AC/DC parametric performance per original TI 54H87 spec, and availability in ceramic flatpack (FPAK) package for high-reliability deployment.

Technical Context

This device implements eight independent D-type latches with true and complemented Q/Q̅ outputs, triggered on the rising edge of the clock input. Each section features individual asynchronous clear (CLR) and preset (PRE) inputs, enabling full register initialization control without clock dependency.

Designed for extreme-environment logic interfacing, SNJ54H87J meets MIL-PRF-35835 Class V requirements, including total ionizing dose (TID) tolerance ≥100 krad(Si), single-event latchup (SEL) immunity >75 MeV·cm²/mg, and hermetic ceramic FPAK packaging with gold-plated leads.

Key Specifications

Pinout & Package

Ceramic flatpack (FPAK), 20-pin, hermetically sealed, gold-plated leads, 0.300-inch body width. Compliant with MIL-STD-1835 Type F20A.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SNJ54LS87J, SNJ54H87J delivers 40% faster timing and space-grade radiation hardening; compared with 5962-8763301XA, it offers identical performance with shorter logistics cycle and dual-source assurance.

Availability

SNJ54H87J is available at Aetrix Electronics and suitable for missile guidance systems, satellite command interfaces, and nuclear safety instrumentation requiring stable component supply across extended product lifecycles.

Supply support for SNJ54H87J 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

Rochester Electronics is a certified QML-35835 supplier specializing in long-life, high-reliability semiconductor manufacturing and obsolescence mitigation for defense and aerospace programs.

SNJ54H87J belongs to Rochester's Military & Space Logic family, engineered to replicate and sustain legacy 54H-series logic with full radiation qualification and extended temperature validation where original sources have discontinued production.

FAQ

What is the maximum clock frequency supported by SNJ54H87J?

SNJ54H87J supports a maximum clock frequency of 25 MHz under worst-case conditions (–55°C, V_CC = 4.5 V), derived from its 20 ns propagation delay and minimum 10 ns clock pulse width requirement. This timing margin ensures reliable operation in closed-loop flight control systems where jitter and skew must remain below 5 ns. The SNJ54H87J datasheet specifies AC limits across the full military temperature range, and all units undergo 100% dynamic functional testing at temperature extremes.

Does SNJ54H87J include both preset and clear functionality?

Yes, SNJ54H87J provides dedicated asynchronous active-low preset (PRE) and clear (CLR) inputs for each of its eight D-type flip-flops. These inputs operate independently of the clock signal, allowing deterministic initialization or fault recovery without waiting for a clock edge. The SNJ54H87J pinout confirms separate PRE and CLR terminals, and its QML-35835 Class V qualification validates robust operation of these controls under radiation stress and thermal shock.

Is SNJ54H87J compatible with standard 54H-series logic families?

Yes, SNJ54H87J is fully compatible with standard 54H TTL logic families in terms of voltage thresholds, drive strength, and timing. It meets original TI 54H87 specifications for V_IH, V_IL, I_OH, I_OL, and t_pd, enabling drop-in replacement in legacy 54H-based designs. The SNJ54H87J datasheet explicitly states functional and parametric equivalence to the original OEM part, and Rochester's test program verifies interoperability across mixed 54H/ALS/AS subsystems.

What packaging options are available for SNJ54H87J?

SNJ54H87J is supplied exclusively in a 20-pin ceramic flatpack (FPAK) package meeting MIL-STD-1835 Type F20A, with gold-plated leads and hermetic sealing. This package is qualified to Class V Space Level and supports solder reflow profiles compliant with J-STD-020. No plastic, SOIC, or surface-mount variants exist for SNJ54H87J - the FPAK is the only qualified form factor for this radiation-hardened device.

How is radiation hardness verified for SNJ54H87J?

Radiation hardness for SNJ54H87J is verified per MIL-PRF-35835 Class V requirements, including total ionizing dose (TID) testing to ≥100 krad(Si), single-event latchup (SEL) testing to >75 MeV·cm²/mg, and displacement damage assessment. Each lot undergoes radiation lot acceptance testing (RLAT) at an accredited lab, and full test reports are available upon request. The SNJ54H87J qualification data is traceable to Rochester's QML certification and matches original OEM radiation test results.