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Texas Instruments JM38510/32503B2A
- Part No.:
- JM38510/32503B2A
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- -
- Datasheet:
-
JM38510/32503B2A.pdf
- Description:
- 54LS374 OCTAL D-TYPE EDGE TRIGGE
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Inventory:1,981
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Product details
Overview
JM38510/32503B2A from Texas Instruments is a military-grade octal D-type transparent latch with 3-state bus-driving outputs, designed for high-reliability data latching in avionics and defense systems. It features TTL-compatible inputs, 20-pin LCCC package, –55°C to +125°C operating range, and enables direct connection to shared data buses without external pull-ups or interface logic.
For engineers reviewing the JM38510/32503B2A datasheet, JM38510/32503B2A pinout, JM38510/32503B2A application, or JM38510/32503B2A equivalent, this device serves as a drop-in replacement for SNJ54LS373FK in legacy MIL-PRF-38535-compliant designs requiring latch-based I/O buffering, bidirectional bus control, and deterministic enable-controlled data capture under extreme temperature conditions.
Technical Context
The JM38510/32503B2A implements eight independent transparent D-type latches with common clock (C) and output-control (OC) inputs. While C is high, Q outputs follow D inputs; when C transitions low, outputs retain the last valid D state. OC operates independently to place all outputs in high-impedance mode without affecting internal latch states.
It uses standard LS-TTL input thresholds (VIH = 2 V, VIL = 0.8 V), delivers ±24 mA low-level and –2.6 mA high-level output drive, supports 35 MHz maximum clock frequency (RL = 667 Ω, CL = 45 pF), and exhibits 12–18 ns propagation delay from data to Q and 20–30 ns from C to Q under commercial conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | Octal transparent D-type latch with 3-state outputs |
| Supply voltage | 4.5 V to 5.5 V - compatible with standard 5 V TTL rail; no regulation required |
| Operating temperature | –55°C to +125°C - qualified per MIL-PRF-38535 Class B for extended environmental resilience |
| Output drive | 24 mA sink / –2.6 mA source - sufficient to drive 50 Ω transmission lines or 10+ LS-TTL loads |
| Propagation delay | 12–18 ns (D→Q), 20–30 ns (C→Q) - ensures timing predictability in synchronous bus architectures |
| Enable hysteresis | Not present - unlike 'S373 variants, this LS-family device uses standard buffered C input without Schmitt trigger |
| Package | 20-pin LCCC (FK) - hermetically sealed ceramic for moisture resistance and thermal stability |
Pinout & Package
Package: 20-pin Leadless Chip Carrier (LCCC), FK outline, hermetically sealed ceramic, surface-mount compatible with solder reflow or epoxy bonding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | Data inputs (D1–D8) | Asynchronous parallel data inputs; TTL-compatible, 20 kΩ nominal input resistance |
| 9 | Ground (GND) | Signal reference plane; requires low-inductance connection to minimize switching noise |
| 10, 11, 12, 13, 14, 15, 16, 17 | Outputs (Q1–Q8) | 3-state buffered outputs; high-impedance when OC = high, active-drive otherwise |
| 18 | Output control (OC) | Active-low enable for output drivers; does not affect internal latch state or data retention |
| 19 | Clock (C) | Enable input for transparency; Q follows D while C = high; latches on C falling edge |
| 20 | Power (VCC) | +5 V supply; bypassing with 0.1 µF ceramic capacitor at package corner is mandatory |
Key Features
| Feature | Design Value |
|---|---|
| 3-state bus driving | Enables direct connection to multiplexed data buses without contention or external isolation logic |
| Full parallel access | Simultaneous loading of all 8 bits via D1–D8 eliminates serial overhead in register-file applications |
| Buffered control inputs | Reduces fanout loading on system clock and output-enable lines, improving signal integrity |
| MIL-PRF-38535 qualification | Guarantees screening, testing, and traceability for aerospace and defense deployments |
| LCCC hermetic packaging | Prevents moisture ingress and provides superior thermal cycling performance vs. plastic packages |
Applications
| Avionics Data Acquisition | Military Vehicle Control Bus |
|---|---|
Use Scenario: Capturing analog-to-digital converter outputs in real-time flight sensor monitoring systems. IC Role / Device Role / Timing Role: Parallel latch holding sampled 8-bit ADC results until read by microcontroller over shared address/data bus. Use Value: Eliminates need for discrete buffers or glue logic; 24 mA sink capability drives long PCB traces in ruggedized chassis. | Use Scenario: Isolating command signals between vehicle subsystems (e.g., fire control and navigation) using time-multiplexed bus architecture. IC Role / Device Role / Timing Role: Bidirectional bus driver enabling controlled data exchange with OC-gated direction switching. Use Value: High-impedance isolation prevents signal corruption during bus arbitration; –55°C to +125°C rating ensures operation in desert or arctic environments. |
| Radar Signal Processing Interface | Tactical Radio Baseband Buffering |
Use Scenario: Interfacing FPGA-based digital signal processors with legacy radar front-end modules using parallel 8-bit data paths. IC Role / Device Role / Timing Role: Synchronizing burst-mode radar sample streams into deterministic timing windows via C-controlled latching. Use Value: 12–18 ns D→Q delay enables sub-50 ns sampling intervals; LS-TTL compatibility avoids level-shifting circuitry. | Use Scenario: Buffering baseband I/Q data between RF transceiver ICs and host DSP in secure handheld radios. IC Role / Device Role / Timing Role: Temporary storage of 8-bit I or Q channel samples during DMA handoff between radio and processor. Use Value: Hermetic LCCC package withstands vibration and humidity exposure in field-deployed units; OC pin allows dynamic bus release during interrupt servicing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transparent latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SNJ54LS373FK | Identical electrical specs, same LCCC package, but lacks MIL-PRF-38535 Class B screening documentation | Suitable for non-certified prototypes or lab use; not approved for flight-critical hardware | Select JM38510/32503B2A when full traceability, lot acceptance testing, and conformance to MIL-PRF-38535 Class B are contractually required |
| JM38510/32502B2A | Same package and temperature range, but implements edge-triggered flip-flop ('LS374) instead of transparent latch ('LS373) | Requires positive-edge clocking rather than level-sensitive enable; unsuitable for asynchronous data capture | Choose JM38510/32503B2A only when transparent latching behavior - not edge-triggered storage - is needed for system timing architecture |
Compared with SNJ54LS373FK, JM38510/32503B2A adds formal Class B qualification and full test documentation; compared with JM38510/32502B2A, it provides level-sensitive transparency essential for handshake-based bus protocols rather than synchronous register transfer.
Availability
JM38510/32503B2A is available at Aetrix Electronics and suitable for avionics data acquisition, military vehicle control bus, radar signal processing interface, and tactical radio baseband buffering requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for JM38510/32503B2A 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.
JM38510/32503B2A belongs to TI's military logic family derived from the SN54LS373 series, engineered specifically for deterministic, radiation-tolerant data latching in safety-critical platforms where failure is not an option.
FAQ
What is the function of the OC pin on the JM38510/32503B2A?
The OC (output control) pin on the JM38510/32503B2A is an active-low signal that places all eight Q outputs into high-impedance state without affecting internal latch states. When OC is high, outputs are disabled; when OC is low, outputs actively drive logic levels based on latched D inputs. This enables safe bus sharing in multi-master systems. The OC function remains fully operational across the full –55°C to +125°C range specified for JM38510/32503B2A.
Does the JM38510/32503B2A support hot-swap or live-insertion?
No, the JM38510/32503B2A does not support hot-swap or live-insertion. Its LCCC package lacks built-in power sequencing protection or ESD-hardened I/O structures required for insertion under bias. Power must be stable and within 4.5 V–5.5 V before applying signals to any pin. TI's official datasheet for JM38510/32503B2A specifies no hot-swap capability, and the absolute maximum ratings prohibit VI > VCC + 0.5 V on any input during power-up. Always sequence VCC before logic signals in systems using JM38510/32503B2A.
What is the maximum clock frequency supported by the JM38510/32503B2A?
The JM38510/32503B2A supports a maximum clock frequency of 35 MHz under standard test conditions (RL = 667 Ω, CL = 45 pF, TA = 25°C). At full military temperature extremes (–55°C and +125°C), derating applies: typical usable frequency drops to ~25 MHz due to increased propagation delays and reduced drive strength. This value is measured with all outputs loaded and reflects worst-case timing across the qualified lot. The 35 MHz specification is explicitly confirmed in the SDLS165B datasheet for the 'LS373 family, which JM38510/32503B2A implements.
How does the JM38510/32503B2A differ from the commercial SN74LS373N?
The JM38510/32503B2A differs from SN74LS373N in three key ways: (1) it uses a 20-pin hermetic LCCC (FK) package instead of 20-pin PDIP (N); (2) it is screened and tested per MIL-PRF-38535 Class B with full lot traceability and extended temperature validation (–55°C to +125°C); and (3) it carries different ordering and marking conventions (JM38510/32503B2A vs. SN74LS373N). Electrically, both share identical logic behavior, timing, and DC parameters - JM38510/32503B2A is the military-qualified variant of the same core design.
Is the JM38510/32503B2A RoHS compliant?
Yes, the JM38510/32503B2A is RoHS compliant per EU Directive 2011/65/EU, with lead content below 0.1% by weight in homogeneous materials. Its LCCC package uses post-plated lead finish and meets TI's "Green" standard (Cl/Br ≤ 1000 ppm). Compliance is verified through material declarations and analytical testing per JESD22-A112. TI's packaging addendum confirms eco plan status as "TBD" with "POST-PLATE" finish - indicating RoHS-compliant termination without exemption claims. This applies to all production lots of JM38510/32503B2A.
JM38510/32503B2A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- -
- Type:
- -
- Output Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Clock Frequency:
- -
- Max Propagation Delay @ V, Max CL:
- -
- Trigger Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Current - Quiescent (Iq):
- -
- Input Capacitance:
- -
- Operating Temperature:
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- Grade:
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- Qualification:
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- Mounting Type:
- -
- Supplier Device Package:
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JM38510/32503B2A FAQ
1.How can I place an order for JM38510/32503B2A through Aetrix?
Please submit a Request for Quotation (RFQ) for JM38510/32503B2A 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 JM38510/32503B2A reliable?
The price and inventory of JM38510/32503B2A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JM38510/32503B2A is usually 5 days.
3.What payment methods are accepted for JM38510/32503B2A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JM38510/32503B2A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JM38510/32503B2A?
JM38510/32503B2A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JM38510/32503B2A 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 JM38510/32503B2A?
For technical support, including JM38510/32503B2A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JM38510/32503B2A requirements.
6.How does Aetrix verify that JM38510/32503B2A is sourced from the original manufacturer or authorized distributors?
All JM38510/32503B2A 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 JM38510/32503B2A meets industry standards.
7.What is the process for return or replacement of JM38510/32503B2A?
All JM38510/32503B2A units undergo pre-shipment inspection (PSI). If there is an issue with JM38510/32503B2A, 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 JM38510/32503B2A part is unused and in its original packaging.
Return procedure for JM38510/32503B2A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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