Texas Instruments JM38510/00204BEA

Overview

JM38510/00204BEA from Texas Instruments is a dual J-K flip-flop with independent preset and clear inputs, designed for synchronous digital logic control in military-grade systems. It operates across –55°C to +125°C, features TTL-compatible input thresholds, 16-pin CDIP package, and supports edge-triggered clocking on both flip-flop sections. It is used in radar timing sequencers, avionics control registers, and hardened data path synchronization.

For engineers reviewing the JM38510/00204BEA datasheet, JM38510/00204BEA pinout, JM38510/00204BEA application, or JM38510/00204BEA equivalent, key selection criteria include military temperature range compliance, dual independent J-K functionality with asynchronous set/reset, CDIP-16 hermetic packaging, and compatibility with legacy 54-series TTL logic families.

Technical Context

The JM38510/00204BEA implements two identical, independently controlled J-K flip-flops sharing only V_CC and GND. Each section has dedicated J, K, preset (PR̅), clear (CLR̅), and clock (CLK) terminals, with negative-edge triggering on CLK and asynchronous active-low PR̅/CLR̅. No internal feedback or cross-coupling exists between sections.

It conforms to MIL-PRF-38535 Class B requirements and is functionally and electrically equivalent to the SN5476J and SN54LS76AJ, differing only in screening level and marking. Propagation delay (t_PLH/t_PHL) is specified at 25 ns max under worst-case military conditions, with guaranteed fan-out of 10 standard TTL loads per output.

Key Specifications

Pinout & Package

Package: 16-pin Ceramic Dual In-line Package (CDIP-J), 0.3-inch body width, hermetically sealed, lead finish SNPB (tin-lead), non-RoHS compliant, MSL N/A.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN5476J and SN54LS76AJ, the JM38510/00204BEA provides the highest reliability assurance through Class B screening and burn-in, making it preferred for mission-critical flight and weapon systems where field failure is unacceptable.

Availability

JM38510/00204BEA is available at Aetrix Electronics and suitable for avionics control registers, radar timing sequencers, and hardened industrial PLC I/O latching requiring stable component supply across extended product lifecycles.

Supply support for JM38510/00204BEA 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 high-reliability logic solutions for aerospace, defense, and industrial markets.

The JM38510/00204BEA belongs to TI's military 54-series logic family, engineered specifically for ruggedized digital control in environments demanding extreme temperature resilience, long-term reliability, and traceable manufacturing history.

FAQ

What is the operating temperature range of the JM38510/00204BEA?

The JM38510/00204BEA is rated for continuous operation from –55°C to +125°C. This range is verified per MIL-STD-883 test method 1010 and applies across all electrical parameters in the datasheet. The specification ensures reliable performance in unpressurized aircraft bays, missile guidance compartments, and desert-deployed ground systems where ambient extremes occur.

Is the JM38510/00204BEA pin-compatible with commercial SN7476 devices?

No, the JM38510/00204BEA is not pin-compatible with commercial SN7476 devices. While both implement dual J-K flip-flops, the JM38510/00204BEA uses a 16-pin CDIP package with separate CLK₁ and CLK₂ inputs, whereas SN7476 uses a 14-pin DIP with shared clock input. Physical layout and signal routing differ fundamentally.

Does the JM38510/00204BEA support master-slave or edge-triggered operation?

The JM38510/00204BEA is a negative-edge-triggered J-K flip-flop. Its clock inputs (pins 15 and 16) respond only to the falling edge of the input signal. There is no master-slave internal architecture - it uses a single-stage edge-triggered design consistent with the SN5476J baseline specification.

What is the maximum clock frequency supported by the JM38510/00204BEA?

The JM38510/00204BEA does not specify a maximum clock frequency in its datasheet. Instead, timing is defined by minimum pulse width (t_W ≥ 20 ns) and setup/hold times (t_SU = 20 ns, t_H = 5 ns). At worst-case military conditions, usable clock rates remain below 20 MHz to maintain timing margin - actual limit depends on board-level signal integrity and load capacitance.

Can the preset and clear functions of the JM38510/00204BEA be used simultaneously with clocked operation?

Yes, the preset (PR̅) and clear (CLR̅) inputs of the JM38510/00204BEA are asynchronous and active-low. They take immediate effect regardless of clock state, overriding any pending J/K or clock activity. When both PR̅ and CLR̅ are asserted low, the outputs enter an undefined metastable state per the datasheet - this condition must be avoided in design.