Texas Instruments JM38510/65705BSA

Overview

JM38510/65705BSA from Texas Instruments is a military-grade octal buffer and line driver with 3-state outputs, organized as two independent 4-bit channels each controlled by separate output-enable (OE) inputs. It operates across 2 V to 6 V, delivers ±6 mA output drive at 5 V, exhibits typical propagation delay of 11 ns (VCC = 4.5 V, CL = 50 pF), and supports operation from –55 °C to +125 °C - used in radiation-tolerant avionics data bus interface and high-reliability memory address buffering.

For engineers reviewing the JM38510/65705BSA datasheet, JM38510/65705BSA pinout, JM38510/65705BSA application, or JM38510/65705BSA equivalent, key selection criteria include its CFP-20 package, MIL-PRF-38535 compliance, guaranteed performance over extended temperature, 3-state bus-driving capability, and compatibility with HC logic voltage thresholds.

Technical Context

The JM38510/65705BSA implements dual 4-bit noninverting buffers with independent OE control per group (1OE for Y1–Y4, 2OE for Y1–Y4), enabling selective bus isolation without affecting the other channel. Its CMOS architecture ensures low static current (ICC ≤ 160 µA max), input tolerance up to VCC, and rail-to-rail output swing.

It adheres to SN54HC244 functional specifications, including defined VIH/VIL thresholds (e.g., VIH ≥ 3.15 V at VCC = 4.5 V), guaranteed VOL ≤ 0.4 V at IOL = 6 mA, and tdis/ten ≤ 43 ns (VCC = 6 V, CL = 50 pF), making it suitable for deterministic timing-critical backplane and telemetry interfaces.

Key Specifications

Pinout & Package

Package: CFP-20 (Ceramic Flatpack, 20-pin, body size 6.92 mm × 13.72 mm, hermetically sealed).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal buffer applications.

Compared with SNJ54HC244W and JM38510/65705BRA, JM38510/65705BSA offers optimal balance of hermetic reliability, board-space efficiency, and thermal performance for production-deployed embedded systems operating under extreme environmental stress.

Availability

JM38510/65705BSA is available at Aetrix Electronics and suitable for avionics data bus interface, radiation-hardened memory address driving, and secure telemetry transmitter applications requiring stable component supply across extended product lifecycles.

Supply support for JM38510/65705BSA 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 company specializing in analog, embedded processing, and high-reliability components for industrial, automotive, aerospace, and defense markets.

JM38510/65705BSA belongs to TI's military logic family designed for high-integrity digital interfacing in safety-critical systems where failure is not an option - emphasizing guaranteed parametric performance, rigorous screening, and long-term obsolescence mitigation.

FAQ

What is the maximum operating temperature range for JM38510/65705BSA?

JM38510/65705BSA is rated for operation from –55 °C to +125 °C, fully compliant with MIL-PRF-38535 Class B temperature requirements. This specification is verified across all electrical parameters in the official TI datasheet SCLS130E, and applies specifically to the CFP-20 package variant. The wide range makes JM38510/65705BSA suitable for deployment in jet engine bays, satellite payloads, and desert-deployed tactical radios.

Does JM38510/65705BSA support 3.3 V logic interfacing?

Yes, JM38510/65705BSA supports 3.3 V operation: its recommended supply range is 2 V to 6 V, and input thresholds scale with VCC (e.g., VIH ≥ 2.0 V at VCC = 3.3 V). When powered at 3.3 V, it delivers ~±4 mA output drive and maintains tpd ≤ 33 ns (CL = 150 pF), enabling direct interfacing with modern low-voltage MCUs without level shifters - confirmed in Section 6.3 and 6.10 of the SCLS130E datasheet.

Is JM38510/65705BSA pin-compatible with commercial SN74HC244 variants?

No - JM38510/65705BSA uses a CFP-20 package with 0.050″ lead pitch and ceramic body, whereas commercial SN74HC244 variants use SOIC, TSSOP, or PDIP packages with different mechanical dimensions and thermal characteristics. While the logic function and pin functions match exactly (same 20-pin assignment per TI's Pin Functions table), PCB layout, soldering process, and thermal management must be redesigned for CFP. Electrical behavior is identical.

What is the output-enable timing behavior of JM38510/65705BSA?

JM38510/65705BSA specifies enable time (ten) ≤ 43 ns and disable time (tdis) ≤ 43 ns at VCC = 6 V and CL = 50 pF, per Table 6.9 in SCLS130E. These values are guaranteed over the full –55 °C to +125 °C range. The symmetry between ten and tdis ensures predictable bus turnaround in half-duplex protocols like MIL-STD-1553B, where rapid, matched transition timing prevents data corruption during direction switching.

How does JM38510/65705BSA handle unused inputs?

All unused inputs of JM38510/65705BSA must be tied to VCC or GND to prevent floating states - a requirement explicitly stated in TI's application note SCBA004 and reinforced in Section 11.1 of SCLS130E. Leaving inputs unconnected risks increased ICC, erratic output behavior, or latch-up due to internal parasitic paths. For example, unused 1A3 should connect directly to VCC or GND; pullup/pulldown resistors ≥ 10 kΩ are acceptable but direct connection is preferred in high-reliability designs.