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Texas Instruments JM38510/65753BRA
- Part No.:
- JM38510/65753BRA
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
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JM38510/65753BRA.pdf
- Description:
- 54HCT240 OCTAL BUFFERS AND LINE
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Product details
Overview
JM38510/65753BRA from Texas Instruments is a military-grade octal inverting 3-state buffer/driver IC designed for memory address and bus driving in high-reliability systems. It operates from 4.5 V to 5.5 V, delivers ±6-mA output drive at 5 V, features typical propagation delay of 12 ns, and supports −55°C to +125°C operation in CDIP-J package.
For engineers reviewing the JM38510/65753BRA datasheet, JM38510/65753BRA pinout, JM38510/65753BRA application, or JM38510/65753BRA equivalent, key selection criteria include its TTL-compatible inputs, 3-state bus-driving capability, high-current LSTTL load drive (up to 15), low ICC (80 µA max), and qualified QML-38510 Class B compliance for aerospace and defense platforms.
Technical Context
This device integrates two independent 4-bit inverting buffers, each with dedicated active-low output-enable (OE) control. Inputs accept standard TTL voltage levels (VIL ≤ 0.8 V, VIH ≥ 2 V), enabling direct interfacing with legacy TTL logic without level-shifting.
All outputs enter high-impedance state when OE is high; when OE is low, inverted data passes from A inputs to Y outputs. The design supports bidirectional bus control and memory address register buffering with guaranteed 3-state isolation and fast enable/disable timing (ten/tdis ≤ 40 ns at 5.5 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures compatibility with 5-V TTL and CMOS systems under wide input regulation tolerance. |
| Propagation Delay | 12 ns typical at 5.5 V, CL = 50 pF - Enables reliable operation in high-speed address/data paths up to ~40 MHz. |
| Output Drive | ±6 mA at 5 V - Sufficient to directly drive 15 LSTTL loads without external buffering. |
| Quiescent Current | 80 µA max - Supports low-static-power system design in always-on military subsystems. |
| Input Leakage | 1 µA max - Prevents signal integrity degradation in high-impedance or long-trace configurations. |
| Operating Temperature | −55°C to +125°C - Qualified per MIL-PRF-38535 for extended environmental resilience in avionics and ground vehicles. |
| 3-State Enable Time | 19 ns max (ten) at 5.5 V - Allows rapid bus arbitration and multi-master timing coordination. |
Pinout & Package
Package: Ceramic Dual-In-Line Package (CDIP-J), 20-pin, hermetically sealed, lead-free finish, RoHS-exempt per MIL-STD-883.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-low output enable | Independent control of each 4-bit buffer group; high = high-Z output, low = enabled inverted output. |
| 1A1–1A4, 2A1–2A4 | Inverting data inputs | Eight TTL-compatible inputs accepting 0.8 V / 2.0 V thresholds; drive corresponding Y outputs when OE active. |
| 1Y1–1Y4, 2Y1–2Y4 | Inverting 3-state outputs | Eight buffered, inverted outputs capable of ±6 mA sink/source; enter high-Z when respective OE is high. |
| VCC (Pin 10), GND (Pin 20) | Power supply terminals | Single 5-V supply rail; decoupling required within 10 mm due to fast switching transients. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-voltage compatible inputs | Direct interface with legacy 74LS/74S logic without level shifters or pull-ups. |
| High-current 3-state outputs | ±6 mA drive ensures robust bus loading across temperature extremes and process variation. |
| Low power consumption | 80 µA max ICC enables use in thermally constrained or battery-backed military modules. |
| MIL-PRF-38535 Class B qualification | QML-38510 certified with full screening (burn-in, temperature cycling, hermeticity) for flight-critical applications. |
| Fast enable/disable timing | 18–19 ns ten/tdis at 5.5 V supports sub-50 ns bus turnaround in time-critical control systems. |
Applications
| Aerospace Flight Control Bus | Ground Vehicle Memory Address Buffering |
|---|---|
|
Use Scenario: Isolating and driving CPU address lines to multiple memory banks in a radiation-tolerant flight computer. IC Role / Device Role / Timing Role: Inverting 3-state buffer providing address demultiplexing and bus contention prevention during DMA cycles. Use Value: Guaranteed −55°C to +125°C operation and QML screening ensure deterministic timing and latch-up immunity in uncontrolled thermal environments. |
Use Scenario: Buffering microcontroller address/data bus signals to SRAM and FPGA configuration memory in armored vehicle ECUs. IC Role / Device Role / Timing Role: Octal inverting driver enabling simultaneous access to dual memory banks while maintaining signal integrity over 15 cm PCB traces. Use Value: ±6-mA output drive and 12 ns tpd maintain setup/hold margins under EMI-heavy engine bay conditions. |
| Tactical Radio Baseband Interface | Secure Crypto Module Address Management |
|
Use Scenario: Interfacing a DSP's external memory interface to shared SRAM and flash in a jam-resistant HF radio transceiver. IC Role / Device Role / Timing Role: Bidirectional bus driver with independent OE control allowing time-multiplexed access between baseband processor and crypto accelerator. Use Value: Low input current (1 µA max) prevents loading of sensitive analog-digital hybrid signal paths near RF sections. |
Use Scenario: Managing address decoding and chip select routing for tamper-evident secure memory in NSA-certified encryption hardware. IC Role / Device Role / Timing Role: Inverting 3-state buffer isolating secure boot ROM address lines from general-purpose peripherals during initialization. Use Value: Hermetic CDIP-J package and MIL-STD-883 testing prevent side-channel leakage via package-induced signal coupling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal inverting 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SNJ54HCT240J | Identical electrical specs and CDIP-J package; differs only in marking and lot traceability per QML-38510 revision baseline. | No functional difference; used interchangeably in new designs where latest QML revision not mandated. | Select SNJ54HCT240J if sourcing from TI's standard military catalog with identical screening but non-38510-specific documentation. |
| 8550501RA | Same die, CDIP-J package, and QML-38510 Class B qualification; marked per JAN specification with alternate part numbering. | Functionally identical; selected when procurement requires JAN-qualified labeling per DoD contracts. | Choose 8550501RA when contract deliverables require JAN nomenclature rather than 38510 prefix. |
Compared with JM38510/65753BRA, SNJ54HCT240J offers identical performance and screening but reflects an earlier QML revision, while 8550501RA provides identical functionality under JAN nomenclature-both serve as drop-in alternatives where documentation or marking requirements differ but electrical and environmental behavior must remain unchanged.
Availability
JM38510/65753BRA is available at Aetrix Electronics and suitable for aerospace flight computers, ground vehicle ECUs, and secure crypto modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for JM38510/65753BRA 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 logic solutions for industrial, automotive, and defense markets.
JM38510/65753BRA belongs to TI's military HCT logic family, engineered specifically for high-speed, low-power 3-state bus interfacing in mission-critical systems operating under extreme environmental stress.
FAQ
What is the operating temperature range of the JM38510/65753BRA?
The JM38510/65753BRA is rated for operation from −55°C to +125°C, fully qualified per MIL-PRF-38535 Class B and tested across this full range for parametric stability, timing consistency, and reliability. This makes JM38510/65753BRA suitable for deployment in avionics, missile guidance, and tracked vehicle control systems where ambient temperatures exceed commercial limits.
Is the JM38510/65753BRA pin-compatible with commercial SN74HCT240 variants?
No-JM38510/65753BRA uses the CDIP-J package (20-pin ceramic DIP), whereas commercial SN74HCT240 variants use PDIP-N, SOIC-DW, TSSOP-PW, or SOP-NS packages. While logic function and pin assignment match the 20-pin topology shown in the SN54HCT240J diagram, physical package dimensions, thermal characteristics, and soldering profiles differ significantly. JM38510/65753BRA is not a drop-in replacement for surface-mount versions without board redesign.
Does the JM38510/65753BRA support non-inverting operation?
No-the JM38510/65753BRA implements fixed inverting logic: when OE is low, Y outputs equal the logical inverse of A inputs. It does not provide selectable inversion or non-inverting modes. For non-inverting 3-state buffering, TI's JM38510/65752BRA (HCT244 variant) is the functionally matched military-grade alternative.
What is the maximum capacitive load the JM38510/65753BRA can drive while maintaining specified timing?
The JM38510/65753BRA is characterized for CL = 50 pF and CL = 150 pF loads. At 5.5 V, propagation delay increases from 12 ns (50 pF) to 19 ns (150 pF); enable/disable times increase from 19 ns to 22 ns. Driving >150 pF risks violating setup/hold windows in high-speed buses-external series termination or buffer staging is recommended beyond this limit. JM38510/65753BRA's output structure is optimized for point-to-point or lightly loaded multidrop buses.
How does the JM38510/65753BRA handle unused inputs?
All unused inputs on the JM38510/65753BRA must be tied to either VCC or GND-floating inputs are prohibited. TI's application report SCBA004 confirms that unconnected CMOS inputs on HCT devices cause increased ICC, oscillation, and potential latch-up. For JM38510/65753BRA, tie unused A inputs to GND (to force low output) or VCC (to force high output), and tie unused OE pins to VCC to disable the associated buffer group.
JM38510/65753BRA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Input Type:
- -
- Output Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
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- Mounting Type:
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- Supplier Device Package:
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JM38510/65753BRA FAQ
1.How can I place an order for JM38510/65753BRA through Aetrix?
Please submit a Request for Quotation (RFQ) for JM38510/65753BRA 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 JM38510/65753BRA reliable?
The price and inventory of JM38510/65753BRA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JM38510/65753BRA is usually 5 days.
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Once your JM38510/65753BRA 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 JM38510/65753BRA?
For technical support, including JM38510/65753BRA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JM38510/65753BRA requirements.
6.How does Aetrix verify that JM38510/65753BRA is sourced from the original manufacturer or authorized distributors?
All JM38510/65753BRA 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 JM38510/65753BRA meets industry standards.
7.What is the process for return or replacement of JM38510/65753BRA?
All JM38510/65753BRA units undergo pre-shipment inspection (PSI). If there is an issue with JM38510/65753BRA, 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 JM38510/65753BRA part is unused and in its original packaging.
Return procedure for JM38510/65753BRA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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