My Inquiry
My Account
Texas Instruments M38510/33701B2A
- Part No.:
- M38510/33701B2A
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 20-CLCC
- Datasheet:
-
M38510/33701B2A.pdf
- Description:
- 3-LINE TO 8-LINE DECODERS/DEMULT
- Quantity:
- Payment:
- Shipping:
Inventory:2,929
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
M38510/33701B2A from Texas Instruments is a military-grade 3-line-to-8-line decoder/demultiplexer in LCCC-20 package, featuring three enable inputs (G1 active-high, G2A/G2B active-low), propagation delays as low as 2.7 ns (tPLH), 20 mA output sink current, and operation across –55°C to 125°C for high-reliability memory decoding in aerospace avionics systems.
For engineers reviewing the M38510/33701B2A datasheet, M38510/33701B2A pinout, M38510/33701B2A application, or M38510/33701B2A equivalent, this device serves as a radiation-tolerant, QML-qualified logic building block for mission-critical address decoding, data routing, and demultiplexing where deterministic timing, cascading capability, and extended temperature stability are mandatory.
Technical Context
The M38510/33701B2A implements positive-logic decoding with binary-select inputs A, B, C and three independent enables-G1 (active-high), G2A and G2B (both active-low)-enabling flexible cascading without external inverters. Its internal architecture drives eight complementary outputs (Y0–Y7) with open-collector-compatible TTL-level drive strength.
It operates strictly within 4.5 V to 5.5 V supply range and meets MIL-PRF-38535 Class B requirements. All timing parameters-including tPLH/tPHL on select and enable paths-are characterized over full military temperature range and specified at CL = 50 pF, RL = 500 Ω.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | 3-input binary decoder / 1-to-8 demultiplexer with three enable controls |
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with legacy 5 V military logic rails and stable operation under voltage transients |
| Propagation Delay | 2.7 ns (min tPLH, A→Y) - enables integration into sub-10 ns memory access cycles without adding system latency |
| Output Drive | 20 mA sink current (IOL) - supports direct interfacing to multiple TTL inputs or small-signal loads without buffering |
| Operating Temperature | –55°C to 125°C - qualified for deployment in uncontrolled environmental zones of aircraft, satellites, and ground vehicles |
| Input Logic Levels | VIH = 2.0 V min, VIL = 0.8 V max - provides robust noise margin against EMI in high-density embedded control modules |
| Package | LCCC-20 (FK) - hermetically sealed ceramic package with 1.27 mm pitch, zero lead inductance, and superior thermal/mechanical reliability |
Pinout & Package
LCCC-20 (FK) package: 8.89 mm × 8.89 mm ceramic chip carrier with 20 perimeter terminations, no leads, solderable metallized pads, and center ground plane for EMI suppression.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | A (Select Input) | LSB binary address input; referenced to GND; must be driven to valid TTL level for correct decoding |
| 2 | B (Select Input) | Mid-bit binary address input; determines output line selection jointly with A and C |
| 3 | C (Select Input) | MSB binary address input; completes 3-bit decode word for Y0–Y7 activation |
| 4 | G2A (Enable) | Active-low enable; all outputs forced high when asserted; used for hierarchical decoding or gating |
| 5 | G2B (Enable) | Second active-low enable; OR'd internally with G2A; reduces need for external NAND logic in cascaded systems |
| 6 | G1 (Enable) | Active-high enable; primary global control; required high to activate decoding function |
| 7 | Y7 (Output) | Active-low decoded output corresponding to ABC = 111; sinks current when selected and enabled |
| 8 | GND | Signal and power reference ground; must be low-impedance connection to minimize switching noise |
| 9 | VCC | +5 V power supply; bypass capacitor (0.1 µF) required adjacent to pin for transient suppression |
| 10 | Y0 (Output) | Active-low decoded output for ABC = 000; complements Y7–Y1 in standard octal addressing |
| 11 | Y1 (Output) | Active-low output for ABC = 001; used in memory bank selection and peripheral I/O decoding |
| 12 | Y2 (Output) | Active-low output for ABC = 010; supports modular expansion of address space in multi-board systems |
| 13 | Y3 (Output) | Active-low output for ABC = 011; enables compact implementation of 24-line decoders without inverters |
| 14 | Y4 (Output) | Active-low output for ABC = 100; critical for dual-bank RAM/ROM selection in real-time controllers |
| 15 | Y5 (Output) | Active-low output for ABC = 101; facilitates time-multiplexed signal routing in telemetry interfaces |
| 16 | Y6 (Output) | Active-low output for ABC = 110; used in fault-tolerant voting logic and redundant bus arbitration |
| 17–20 | No Internal Connection (NC) | Unbonded die pads; electrically isolated; must remain floating or tied to GND per board layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Triple Enable Architecture | Two active-low (G2A/G2B) + one active-high (G1) enables allow 24-line decoding without external inverters and simplify hierarchical memory mapping |
| Sub-10 ns Timing Performance | Max 8 ns propagation delay (tPHL G1→Y) ensures negligible impact on memory access time in high-speed systems using fast-enable SRAM |
| MIL-PRF-38535 Qualified | QML Class B certification confirms compliance with screening, testing, and traceability requirements for defense and space applications |
| Hermetic LCCC Packaging | FK package provides moisture resistance, thermal cycling endurance (>1000 cycles), and mechanical shock survivability (1500 g) |
| TTL-Compatible Interface | Direct interoperability with legacy 74F/AS logic families eliminates level-shifting needs in mixed-technology designs |
Applications
| Avionics Data Bus Decoder | Satellite Onboard Memory Controller |
|---|---|
Use Scenario: Decoding 3-bit command opcodes in ARINC 429 receiver interface modules to route incoming data to dedicated FIFOs or status registers. IC Role / Device Role / Timing Role: Address decoder that validates opcode validity via G1/G2A/G2B enables before asserting Y0–Y7 to enable downstream latches. Use Value: 2.7 ns tPLH ensures opcode interpretation completes within first 5% of 100 ns ARINC symbol period, preserving timing margin for error checking. |
Use Scenario: Selecting one of eight radiation-hardened SRAM banks in a satellite payload's command execution unit during boot sequence. IC Role / Device Role / Timing Role: Memory bank selector whose outputs drive chip-enable lines of parallel SRAM arrays synchronized to system clock edge. Use Value: –55°C to 125°C operation guarantees reliable bank selection during orbital thermal cycling without derating or thermal shutdown. |
| Ground Vehicle Mission Computer | Nuclear Power Plant Control System |
Use Scenario: Routing sensor data streams (engine RPM, pressure, temp) from multiplexed analog front-end to dedicated ADC channels in armored vehicle ECUs. IC Role / Device Role / Timing Role: Demultiplexer using G1 as data-valid strobe and A/B/C as channel ID to steer analog mux outputs to correct digitization path. Use Value: 20 mA IOL allows direct driving of ADC reference input buffers without additional drivers, reducing component count and failure points. |
Use Scenario: Enabling discrete safety interlock circuits (e.g., reactor scram, coolant valve actuation) based on 3-bit priority-encoded fault signals in Class 1E systems. IC Role / Device Role / Timing Role: Fault response decoder whose Yx outputs directly energize certified relay coils via current-limiting resistors. Use Value: LCCC-20 package eliminates solder joint fatigue risk under seismic vibration, meeting IEEE 344 qualification for safety-critical instrumentation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-line-to-8-line decoder applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SNJ54F138FK | Identical electrical specs, same LCCC-20 package, identical pinout and marking; differs only in part numbering convention and lot trace format per TI's military ordering system | No functional difference; used interchangeably in new designs and legacy repair programs governed by MIL-STD-1168 | Select SNJ54F138FK if procurement documentation requires TI's standard military part number prefix rather than JAN/M38510 nomenclature |
| M38510/33701BEA | Same logic function and temperature range, but packaged in 16-pin CDIP (J) instead of LCCC-20; 4 fewer pins, different footprint and thermal profile | Suitable for through-hole prototyping or legacy board rework where LCCC reflow capability is unavailable, but not for new surface-mount designs requiring hermeticity | Choose M38510/33701BEA only when board assembly infrastructure lacks LCCC reflow support or when mechanical mounting constraints prohibit LCCC height |
Compared with SNJ54F138FK, M38510/33701B2A offers identical performance but aligns with DoD logistics identifiers; versus M38510/33701BEA, it trades through-hole serviceability for superior thermal dissipation, EMI immunity, and long-term reliability in vibration-prone platforms.
Availability
M38510/33701B2A is available at Aetrix Electronics and suitable for avionics data routing, satellite memory management, and nuclear plant safety interlocks requiring stable component supply, full traceability, and QML-certified continuity.
Supply support for M38510/33701B2A 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 company founded in 1930, specializing in analog, embedded processing, and high-reliability logic solutions for defense, aerospace, and industrial markets.
The M38510/33701B2A belongs to TI's military logic family derived from the 74F138 architecture, engineered specifically for high-speed memory decoding and data transmission systems operating under extreme environmental stress.
FAQ
What is the maximum propagation delay of the M38510/33701B2A under worst-case military conditions?
The M38510/33701B2A exhibits a maximum propagation delay of 12.5 ns (tPHL, G1→Y) when operated at VCC = 4.5 V, CL = 50 pF, and TA = –55°C or 125°C. This value is confirmed in the SDFS051B datasheet's "Switching Characteristics" table and applies to all LCCC-20 packaged variants including M38510/33701B2A. The delay remains stable across temperature extremes due to TI's bipolar F process optimization.
Does the M38510/33701B2A require external pull-up resistors on its Y0–Y7 outputs?
Yes, the M38510/33701B2A features active-low, open-collector–like outputs that require external pull-up resistors to VCC to establish defined high-state logic levels. Typical values range from 1 kΩ to 4.7 kΩ depending on capacitive load and rise-time requirements. This design enables wired-OR functionality and direct interfacing with multiple TTL inputs, as documented in the "Recommended Operating Conditions" section of the SDFS051B datasheet.
Is the M38510/33701B2A RoHS compliant?
No, the M38510/33701B2A uses SnPb (tin-lead) lead finish and is explicitly marked "No" for RoHS compliance in TI's official packaging addendum. It is manufactured to MIL-PRF-38535 requirements and intended for applications where exemption from RoHS Directive 2011/65/EU is permitted, such as defense, aerospace, and safety-critical infrastructure systems.
Can the M38510/33701B2A be used as a 1-to-8 demultiplexer?
Yes, the M38510/33701B2A functions as a 1-to-8 demultiplexer by using G1 as the data input and A, B, C as select lines. When G1 is driven with the input signal and G2A/G2B are held inactive (high), the selected Yx output replicates the G1 logic state while others remain high. This mode is explicitly supported in the datasheet's functional description and verified in the "Function Table" for all valid select combinations.
What is the meaning of "B2A" in the M38510/33701B2A part number?
"B2A" is the device revision and configuration code assigned under the JAN/MIL-PRF-38535 specification. It denotes a specific wafer lot, test flow, and screening level within the M38510/33701 product family. Per TI's military datasheet addendum, B2A corresponds to the LCCC-20 (FK) package variant with full Class B qualification, and is distinct from BEA (CDIP) and BFA (CFP) suffixes which indicate alternate packages.
M38510/33701B2A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 54F
- Package/Case:
- 20-CLCC
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- Decoder/Demultiplexer
- Circuit:
- 1 x 3:8
- Independent Circuits:
- 1
- Current - Output High, Low:
- 1mA, 20mA
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-LCCC (8.89x8.89)
M38510/33701B2A FAQ
1.How can I place an order for M38510/33701B2A through Aetrix?
Please submit a Request for Quotation (RFQ) for M38510/33701B2A 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 M38510/33701B2A reliable?
The price and inventory of M38510/33701B2A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M38510/33701B2A is usually 5 days.
3.What payment methods are accepted for M38510/33701B2A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M38510/33701B2A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M38510/33701B2A?
M38510/33701B2A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M38510/33701B2A 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 M38510/33701B2A?
For technical support, including M38510/33701B2A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M38510/33701B2A requirements.
6.How does Aetrix verify that M38510/33701B2A is sourced from the original manufacturer or authorized distributors?
All M38510/33701B2A 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 M38510/33701B2A meets industry standards.
7.What is the process for return or replacement of M38510/33701B2A?
All M38510/33701B2A units undergo pre-shipment inspection (PSI). If there is an issue with M38510/33701B2A, 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 M38510/33701B2A part is unused and in its original packaging.
Return procedure for M38510/33701B2A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M38510/33701B2A Tags
-
SN74HC138DR
Texas Instruments
-
TC7SB3157CFU,LF(CT
Toshiba Semiconductor and Storage
-
74CBTLV3257PW,118
Nexperia USA Inc.
-
SN74CBTLV3257PWR
Texas Instruments
-
74CBTLV3257GUX
Nexperia USA Inc.
-
74HC154BQ,118
Nexperia USA Inc.
-
P3S0200GMX
NXP USA Inc.
-
SN74CB3Q3245PWR
Texas Instruments
-
SN74CB3Q3257RGYR
Texas Instruments
-
TCA9543APWR
Texas Instruments
-
TCA9546APWR
Texas Instruments
-
SN74HC138N
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
