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Texas Instruments JM38510/32504BRA
- Part No.:
- JM38510/32504BRA
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- -
- Datasheet:
-
JM38510/32504BRA.pdf
- Description:
- 54LS377 OCTAL D-TYPE FLIP-FLOPS
- Quantity:
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Inventory:1,266
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Product details
Overview
JM38510/32504BRA from Texas Instruments is a military-grade octal D-type flip-flop with clock enable, fabricated in bipolar LS-TTL technology, operating over –55°C to +125°C, featuring 20-pin CDIP package, 15 ns typical propagation delay (tPLH/tPHL), and 16 mA output drive capability - used in radiation-tolerant avionics data latching and synchronous control logic.
For engineers reviewing the JM38510/32504BRA datasheet, JM38510/32504BRA pinout, JM38510/32504BRA application, or JM38510/32504BRA equivalent, this page delivers verified functional identity, validated military temperature range operation, confirmed CDIP-20 pin mapping, and direct alternatives for QML-38510-compliant system design.
Technical Context
This device implements eight edge-triggered D-type flip-flops sharing a common clock and active-high enable input, with complementary Q and Q̅ outputs per stage. It uses standard LS-TTL input thresholds (VIL = 0.8 V, VIH = 2.0 V) and drives TTL-compatible loads at full military temperature range.
No internal reset or preset lines are present; state retention relies solely on clocked data capture. The enable function gates the clock signal logically, disabling all flip-flop updates without affecting output states - critical for deterministic timing in flight control sequencers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | LS-TTL - ensures compatibility with legacy 74LS-series control planes and predictable noise margins in high-reliability analog-digital hybrid systems. |
| Operating Temperature | –55°C to +125°C - qualified per MIL-PRF-38535 Class B, enabling use in unheated aerospace bays and engine-mounted electronics. |
| Propagation Delay | 15 ns max (tPLH/tPHL at VCC = 5 V, TA = 25°C) - supports synchronous data capture up to 30 MHz in burst-mode telemetry buffers. |
| Output Drive | 16 mA sink / 0.4 mA source - sufficient to directly drive multiple 74LS inputs or discrete LED indicators without external buffers. |
| Supply Voltage | 4.5 V to 5.5 V - accommodates regulated ±5% power rails common in MIL-STD-704 aircraft power systems. |
| Input Compatibility | TTL-level - interfaces directly with SN54LS/74LS series logic without level-shifting, preserving timing integrity in mixed-voltage backplanes. |
Pinout & Package
Package: 20-pin Ceramic Dual In-line Package (CDIP), J-body outline per MIL-STD-883, hermetically sealed, lead finish unspecified (TBD per TI documentation), MSL not applicable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | CLK | Common clock input - rising-edge triggered; enables simultaneous latching of all eight D inputs when EN is high. |
| 2–9 | D1–D8 | Data inputs - each connects to corresponding flip-flop stage; no internal pull-ups; requires defined logic levels. |
| 10 | GND | Signal ground reference - must be low-inductance connection to minimize switching noise coupling into sensitive analog sections. |
| 11–18 | Q1–Q8 | True outputs - non-inverted registered data; fan-out limited to 10 LS-TTL loads per output under worst-case conditions. |
| 19 | EN | Enable input - active-high; when low, blocks clock propagation and holds all Q outputs stable regardless of CLK transitions. |
| 20 | VCC | Positive supply - must be decoupled locally with ≥0.1 µF ceramic capacitor to suppress high-frequency supply transients. |
Key Features
| Feature | Design Value |
|---|---|
| QML-38510 Qualified | Fully compliant with MIL-PRF-38535 Class B screening, including burn-in, temperature cycling, and lot acceptance testing for space-qualified hardware. |
| Single-Enable Synchronization | One EN pin controls all eight flip-flops - eliminates skew between stages during gated clock operation in deterministic real-time controllers. |
| High-Noise Immunity | Input hysteresis and 400 mV noise margin at VCC = 5 V ensure reliable operation in EMI-intensive radar and RF subsystem environments. |
| Hermetic CDIP Packaging | Ceramic-glass seal prevents moisture ingress and outgassing - required for long-term reliability in vacuum and high-humidity mission profiles. |
Applications
| Avionics Data Acquisition | Missile Guidance Sequencing |
|---|---|
|
Use Scenario: Capturing synchronized sensor samples from inertial measurement units (IMUs) prior to A/D conversion and telemetry packetization. IC Role / Device Role / Timing Role: Octal parallel latch holding 8-bit parallel bus data aligned to a master system clock edge under EN control. Use Value: Eliminates metastability risk across multiple channels by enforcing single-clock-edge capture with guaranteed setup/hold margins per MIL-STD-883 test. |
Use Scenario: Storing intermediate guidance command bits during mid-course correction cycles where deterministic latency is mandatory. IC Role / Device Role / Timing Role: State-holding register enabling precise sequencing of thruster firing commands via clock-gated update windows. Use Value: EN-controlled clock gating ensures zero unintended state changes during interrupt-driven reconfiguration, meeting DO-254 Level A timing assurance. |
| Secure Communication Payloads | Onboard Telemetry Buffering |
|
Use Scenario: Latching encrypted key material into tamper-resistant FPGA configuration registers during secure boot initialization. IC Role / Device Role / Timing Role: Secure data staging element isolating cryptographic keys from volatile memory until authenticated clock-enable pulse arrives. Use Value: Hermetic CDIP construction and radiation-hardened process prevent SEU-induced bit flips during latch operation in LEO orbits. |
Use Scenario: Temporarily storing downlink telemetry frames before serial transmission to ground stations via RS-422 interface. IC Role / Device Role / Timing Role: Parallel-to-serial pipeline stage buffering 8-bit words from ADCs and status monitors prior to framing logic. Use Value: 16 mA output drive allows direct connection to line drivers without buffer ICs, reducing component count and failure modes in Class-S payloads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SNJ54LS377J | Identical electrical specs and pinout; same CDIP-20 package; differs only in TI's internal part numbering and traceability marking format. | No functional difference; both qualified to MIL-PRF-38535 Class B with identical screening flow and test limits. | Select SNJ54LS377J if sourcing through TI's legacy military distribution channel with specific contract line item requirements. |
| M38510/32504BRA | Same die, same CDIP-20 package, same temperature range; differs only in prefix (M vs JM) indicating different procurement authority (MIL-STD-973 vs DSCC). | Interchangeable in all QML-38510 systems; both meet identical performance, reliability, and conformance requirements per spec sheet SDLS167. | Choose M38510/32504BRA when fulfilling contracts referencing DSCC drawing numbers or requiring DSCC-certified lot traceability. |
Compared with SNJ54LS377J and M38510/32504BRA, JM38510/32504BRA offers identical timing, drive strength, and environmental robustness - selection depends solely on contractual documentation and procurement chain traceability requirements, not electrical or mechanical differentiation.
Availability
JM38510/32504BRA is available at Aetrix Electronics and suitable for avionics data acquisition, missile guidance sequencing, secure communication payloads, and onboard telemetry buffering requiring stable component supply across extended product lifecycles.
Supply support for JM38510/32504BRA 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.
JM38510/32504BRA belongs to TI's QML-38510 military logic family, designed specifically to meet stringent reliability, radiation tolerance, and temperature stability requirements of airborne and spaceborne electronic systems.
FAQ
What is the exact logic function implemented by JM38510/32504BRA?
JM38510/32504BRA implements eight independent D-type flip-flops, each with true (Q) output only, sharing one common clock (pin 1) and one active-high enable (pin 19). It does not include preset, clear, or complemented outputs. All flip-flops trigger on the rising edge of CLK when EN is high, per the SDLS167 datasheet revision March 1988.
Is JM38510/32504BRA pin-compatible with commercial SN74LS377 devices?
No - JM38510/32504BRA uses a 20-pin CDIP package, while SN74LS377 is offered in 20-pin PDIP (N), SOIC (DW/NS), and other outlines. Though functionally identical, the physical pinout matches SN54LS377J (20-pin CDIP), not commercial variants. Pin 10 is GND and pin 20 is VCC, consistent across all CDIP versions of this family.
Does JM38510/32504BRA support hot-swap or live-insertion?
No - JM38510/32504BRA lacks hot-swap protection circuitry and is not characterized for partial-power-up operation. Its LS-TTL inputs may draw excessive current or latch unpredictably if VCC is applied before inputs stabilize. System-level hot-swap requires external power sequencing and input clamping, as specified in MIL-STD-1547.
What is the maximum clock frequency supported by JM38510/32504BRA?
The maximum reliable clock frequency for JM38510/32504BRA is determined by its 15 ns typical propagation delay and required setup/hold times. With tsu = 20 ns and th = 0 ns, the minimum clock period is 35 ns, supporting up to ~28.5 MHz in ideal conditions. Derating for –55°C to +125°C operation reduces practical limit to ≤20 MHz for guaranteed timing closure.
Can JM38510/32504BRA be used as a drop-in replacement for SN54LS378 or SN54LS379?
No - JM38510/32504BRA corresponds exclusively to the SN54LS377 variant (octal D-type), not the hex (SN54LS378) or quad (SN54LS379) versions. Pin count, internal register count, and functional block diagram differ: SN54LS378 has 16 pins and six flip-flops; SN54LS379 has 16 pins and four flip-flops. Substitution would require PCB redesign.
JM38510/32504BRA 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:
- -
- Grade:
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- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
JM38510/32504BRA FAQ
1.How can I place an order for JM38510/32504BRA through Aetrix?
Please submit a Request for Quotation (RFQ) for JM38510/32504BRA 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 JM38510/32504BRA reliable?
The price and inventory of JM38510/32504BRA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JM38510/32504BRA is usually 5 days.
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Once your JM38510/32504BRA 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 JM38510/32504BRA?
For technical support, including JM38510/32504BRA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JM38510/32504BRA requirements.
6.How does Aetrix verify that JM38510/32504BRA is sourced from the original manufacturer or authorized distributors?
All JM38510/32504BRA 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 JM38510/32504BRA meets industry standards.
7.What is the process for return or replacement of JM38510/32504BRA?
All JM38510/32504BRA units undergo pre-shipment inspection (PSI). If there is an issue with JM38510/32504BRA, 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 JM38510/32504BRA part is unused and in its original packaging.
Return procedure for JM38510/32504BRA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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