Texas Instruments JM38510/50402BRA

Overview

JM38510/50402BRA from Texas Instruments is a military-grade programmable array logic (PAL) device in the 16R8 family, configured as an 8-input, 8-output registered logic array with clocked D-type flip-flops and 3-state output control. It operates across –55°C to 125°C, supports 16 MHz minimum clock frequency (A-2 speed grade), delivers 12 mA low-level output drive, and is packaged in a 20-pin ceramic flat (FK) package for high-reliability aerospace and defense systems.

For engineers reviewing the JM38510/50402BRA datasheet, JM38510/50402BRA pinout, JM38510/50402BRA application, or JM38510/50402BRA equivalent, key selection criteria include its military temperature rating, registered output architecture with OE-controlled 3-state outputs, TTL-compatible I/O levels, and fuse-based nonvolatile logic configuration-critical for legacy system sustainment and radiation-tolerant digital control designs.

Technical Context

JM38510/50402BRA implements a fixed 32 × 64 AND-OR logic array with eight registered D-type flip-flops, each driven by a common CLK input and individually enabled via output enable (OE). Its logic plane feeds directly into edge-triggered storage elements, supporting synchronous state-machine implementation without external latches.

The device uses titanium-tungsten fusible-link programming, requires no external configuration memory, and maintains logic state through power cycles. All inputs and I/Os are TTL-compatible with VIH ≥ 2 V, VIL ≤ 0.8 V, and VOL ≤ 0.4 V at IOL = 12 mA-ensuring interoperability with legacy 5-V TTL and LS logic families in avionics backplanes and missile guidance subsystems.

Key Specifications

Pinout & Package

Package: 20-pin ceramic flatpack (FK), hermetically sealed, leadless, 0.300-inch body width, compliant with MIL-STD-883 Method 2019 for mechanical shock and vibration.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar registered PAL applications.

Compared with JM38510/50402BRA, JM38510/50401BRA reduces output count and logic density for simpler control tasks, while 5962-8763301XA offers identical functionality without military qualification-enabling trade-offs between reliability assurance, radiation tolerance, and procurement cost in embedded system design.

Availability

JM38510/50402BRA is available at Aetrix Electronics and suitable for avionics flight control, missile guidance logic, secure communications crypto modules, and spacecraft onboard computer I/O expansion requiring stable component supply across extended temperature and radiation environments.

Supply support for JM38510/50402BRA 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 defense, aerospace, and industrial markets.

JM38510/50402BRA belongs to TI's military PAL product line, designed specifically for long-lifecycle, high-integrity digital control in systems where field reprogrammability is unnecessary but configuration permanence and environmental robustness are mandatory.

FAQ

What is the maximum clock frequency supported by JM38510/50402BRA?

JM38510/50402BRA is rated for a minimum clock frequency of 16 MHz (A-2 speed grade), with typical maximum operation up to 25 MHz under nominal conditions. Its guaranteed tpd from CLK↑ to Q is 25 ns max, enabling reliable synchronous logic at 40 MHz equivalent toggle rate in controlled environments. The device does not support programmable clock dividers or internal PLLs.

Does JM38510/50402BRA require external programming hardware after initial configuration?

No-JM38510/50402BRA uses titanium-tungsten fusible-link technology, making it a one-time-programmable (OTP) device. Once programmed using a compatible PAL programmer (e.g., Data I/O PS-200), the logic configuration is permanently stored and requires no external memory, power, or reprogramming circuitry. No configuration pins or JTAG interface exist on JM38510/50402BRA.

Can JM38510/50402BRA operate with a 3.3 V supply?

No-JM38510/50402BRA is specified only for 4.5 V to 5.5 V operation per MIL-PRF-38535 and TI SRPS016. Its input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) and output drive characteristics (VOH ≥ 2.4 V at IOH = –2 mA) are optimized for 5 V TTL compatibility. Operation below 4.5 V violates recommended conditions and may cause metastability or incomplete register capture.

What is the purpose of the OE pin on JM38510/50402BRA?

The OE (Output Enable) pin on JM38510/50402BRA is an active-low control that places all eight Q outputs into high-impedance (3-state) mode simultaneously. When OE is high, outputs are disabled and present >100 kΩ impedance; when OE is low, registered outputs drive valid logic levels. This enables time-multiplexed bus sharing and eliminates contention in multi-device data paths.

Is JM38510/50402BRA pin-compatible with commercial PAL16R8A-2M devices?

Yes-JM38510/50402BRA shares identical pinout, logic architecture, and electrical behavior with commercial PAL16R8A-2M variants (e.g., 5962-8763301XA), differing only in screening, packaging (FK vs. J), and qualification documentation. The 20-pin FK ceramic flatpack matches the 20-pin DIP footprint mechanically in mounting hole pattern, though leadform differs; PCB layout adaptation is required for direct replacement.