My Inquiry
My Account
Texas Instruments SNJ54BCT2240J
- Part No.:
- SNJ54BCT2240J
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
-
SNJ54BCT2240J.pdf
- Description:
- 54BCT2240 OCTAL BUFFERS AND LINE
- Quantity:
- Payment:
- Shipping:
Inventory:4,228
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SNJ54BCT2240J from Texas Instruments is a military-grade octal noninverting buffer/line driver with dual 4-bit sections, 3-state outputs, and BiCMOS architecture operating from 4.5 V to 5.5 V. It features integrated 33-Ω series output resistors, ±12 mA drive capability, and −55°C to +125°C operation-designed for memory address buffering and bus driving in radiation-tolerant avionics and defense systems.
For engineers reviewing the SNJ54BCT2240J datasheet, SNJ54BCT2240J pinout, SNJ54BCT2240J application, or SNJ54BCT2240J equivalent, key selection criteria include its CDIP-20 hermetic package, dual independent OE controls, guaranteed high-impedance state during power sequencing, and compatibility with TTL-level input thresholds in harsh-environment digital backplanes.
Technical Context
The SNJ54BCT2240J implements two independent 4-bit noninverting buffer sections (1A→1Y and 2A→2Y), each controlled by its own active-low output-enable (1OE, 2OE). Its BiCMOS design reduces ICCZ quiescent current to 6–8 mA while maintaining TTL-compatible VIH/VIL thresholds (2.0 V/0.8 V) and fast propagation delays (tPLH/tPHL ≤ 6.3 ns at 5 V).
Each Y output integrates a 33-Ω series resistor to suppress transmission-line overshoot/undershoot without external components. The device supports hot-swap-safe 3-state control: tying OE to VCC via pullup ensures high-impedance on power-up, and outputs sink/source up to 12 mA while tolerating −0.5 V to 5.5 V disabled-state voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures stable operation across MIL-STD-704 aircraft power rails and wide-temperature DC supplies. |
| Output Drive | ±12 mA - Sufficient to directly drive 50-Ω transmission lines or TTL-loaded buses without external buffers. |
| Propagation Delay | tPLH/tPHL ≤ 6.3 ns @ 5 V - Enables reliable timing in 100+ MHz address/data strobe paths. |
| 3-State Enable Time | tPZH/tPLZ ≤ 9.3 ns @ 5 V - Supports rapid bus arbitration and multiplexing in real-time control subsystems. |
| Input Thresholds | VIH = 2.0 V, VIL = 0.8 V - Fully compatible with standard TTL logic families without level-shifting. |
| Operating Temperature | −55°C to +125°C - Qualified per MIL-PRF-38535 Class B for extended-life deployment in engine bays and space-qualified enclosures. |
| Package | CDIP-20 (J package) - Hermetically sealed ceramic dual in-line package with lead finish SNPB for solderability and long-term reliability. |
Pinout & Package
SNJ54BCT2240J uses a 20-pin Ceramic Dual In-Line Package (CDIP-J), hermetically sealed with tin-lead (SNPB) leads, rated for −55°C to +125°C operation and compliant with MIL-STD-883 test methods.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE | Active-low output enable for Section 1 (1A1–1A4 → 1Y1–1Y4) | Drives all four Y outputs into high-Z when high; requires pullup to VCC for power-up safety. |
| 1A1–1A4 | Noninverting inputs for Section 1 | Accept TTL-compatible signals; no external termination needed due to internal 33-Ω series resistance on outputs. |
| 1Y1–1Y4 | Noninverting buffered outputs for Section 1 | Each includes integrated 33-Ω series resistor to dampen ringing on PCB traces up to 15 cm. |
| 2OE | Active-low output enable for Section 2 (2A1–2A4 → 2Y1–2Y4) | Independent control enables interleaved bus access or fault-isolated channel operation. |
| 2A1–2A4 | Noninverting inputs for Section 2 | Electrically isolated from Section 1 inputs; supports dual-bus or redundant path architectures. |
| 2Y1–2Y4 | Noninverting buffered outputs for Section 2 | Matched delay and drive strength to Section 1 outputs for synchronous multi-channel timing. |
| VCC (Pin 10) | Positive supply | Must be decoupled locally with ≥0.1 µF ceramic capacitor to maintain noise margin under switching transients. |
| GND (Pin 20) | Ground reference | Shared return for both sections; layout must minimize ground bounce between output groups. |
Key Features
| Feature | Design Value |
|---|---|
| BiCMOS process technology | Reduces ICCZ quiescent current to 6–8 mA-critical for low-power standby modes in battery-backed avionics. |
| Integrated 33-Ω output series resistors | Eliminates need for 8 external surface-mount resistors, saving PCB area and assembly cost in high-reliability modules. |
| Dual independent 3-state controls (1OE, 2OE) | Enables selective channel isolation-e.g., disable one section during memory refresh while keeping I/O active. |
| TTL-compatible input thresholds | VIH = 2.0 V / VIL = 0.8 V ensures interoperability with legacy 74LS, 74ALS, and microcontroller GPIO without level shifters. |
| MIL-PRF-38535 Class B qualification | Includes 100% screening, burn-in, and parametric testing-required for flight-critical hardware in DoD platforms. |
Applications
| Avionics Data Bus Interface | Rad-Hard Memory Address Buffer |
|---|---|
|
Use Scenario: Interfacing a radiation-hardened FPGA to a MIL-STD-1553B remote terminal's address/data bus with strict EMI and timing constraints. IC Role / Device Role / Timing Role: Noninverting buffer isolating FPGA address lines from bus drivers; provides 3-state control synchronized to bus arbitration cycles. Use Value: Integrated 33-Ω resistors suppress edge-induced radiated emissions below DO-160G Level A limits without added components. |
Use Scenario: Driving 16-bit memory address lines in a satellite onboard computer where single-event latchup (SEL) immunity and thermal cycling survival are mandatory. IC Role / Device Role / Timing Role: Octal line driver delivering TTL-compatible address signals to SRAM/ROM chips across −55°C to +125°C ambient. Use Value: Guaranteed tPLH ≤ 6.3 ns and VCC = 4.5–5.5 V operation ensure setup/hold compliance even under worst-case voltage and temperature corners. |
| Tactical Radio Baseband Control | Missile Guidance Signal Conditioning |
|
Use Scenario: Routing configuration commands from a secure crypto processor to multiple RF front-end ICs in a jam-resistant software-defined radio. IC Role / Device Role / Timing Role: Dual-section buffer enabling simultaneous command broadcast (Section 1) and status feedback capture (Section 2) over shared control lines. Use Value: Independent 1OE/2OE pins allow time-multiplexed bidirectional signaling on a single 8-wire harness, reducing connector pin count. |
Use Scenario: Isolating inertial measurement unit (IMU) sensor data paths from guidance processor inputs in a high-G launch environment. IC Role / Device Role / Timing Role: High-reliability buffer preventing noise coupling between analog conditioning stages and digital processing blocks. Use Value: Hermetic CDIP-20 package and MIL-PRF-38535 screening ensure zero latent defects after 20,000 G shock exposure and 1000 thermal cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal noninverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SNJ54ACT240J | AC-family CMOS; lower ICCZ (2 µA), but only ±24 mA drive and no integrated series resistors. | Preferred for ultra-low-power standby, but requires external termination and fails MIL-STD-704 transient immunity tests above 100 kHz. | Select when static power dominates budget and board space allows discrete 33-Ω resistors per output. |
| SNJ54LS240J | LS-TTL process; higher ICC (40 mA), slower tPLH (15 ns), no built-in series resistors. | Suitable for legacy system upgrades where AC/BiCMOS speed is unnecessary and existing PCB layout cannot accommodate new termination. | Choose only for drop-in replacement in pre-1995 designs where BiCMOS advantages are not required. |
Compared with SNJ54ACT240J and SNJ54LS240J, the SNJ54BCT2240J uniquely balances low ICCZ, integrated signal integrity features, and MIL-qualified ruggedness-making it the sole option for new designs requiring simultaneous high-speed, low-noise, and high-reliability bus interfacing.
Availability
SNJ54BCT2240J is available at Aetrix Electronics and suitable for avionics backplane interconnects, radiation-hardened memory subsystems, and tactical communications control logic requiring stable component supply across extended product lifecycles.
Supply support for SNJ54BCT2240J 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 military/aerospace ICs.
The SNJ54BCT2240J belongs to TI's 54BCT logic family-designed specifically for high-density, high-speed, low-noise memory address and bus driving in mission-critical defense and space systems.
FAQ
What is the maximum operating temperature range for the SNJ54BCT2240J?
The SNJ54BCT2240J is rated for operation from −55°C to +125°C and is fully qualified per MIL-PRF-38535 Class B, including temperature cycling, burn-in, and parametric testing across this full range. This makes the SNJ54BCT2240J suitable for engine-mounted avionics, missile guidance electronics, and satellite payload systems exposed to extreme thermal environments.
Does the SNJ54BCT2240J require external pull-up resistors on its OE pins?
Yes-the SNJ54BCT2240J requires pull-up resistors on both 1OE and 2OE pins to VCC to guarantee high-impedance outputs during power-up and power-down sequences. TI specifies minimum resistor values based on the current-sinking capability of the driver; typical values range from 4.7 kΩ to 10 kΩ. This ensures the SNJ54BCT2240J remains safely isolated until firmware asserts valid enable states.
Can the SNJ54BCT2240J drive 50-Ω transmission lines directly?
Yes-the SNJ54BCT2240J integrates 33-Ω series resistors on all eight Y outputs, enabling direct connection to 50-Ω PCB traces up to 15 cm in length without external termination. This feature eliminates eight discrete resistors per device and reduces signal reflections that cause timing jitter or EMI in high-speed digital backplanes using the SNJ54BCT2240J.
Is the SNJ54BCT2240J pin-compatible with the commercial SN74BCT2240N?
No-the SNJ54BCT2240J uses a 20-pin CDIP (J) package with hermetic ceramic construction and SNPB leads, while the SN74BCT2240N uses a 20-pin PDIP (N) plastic package with matte tin finish. Although both share identical pin functions and logic behavior, their mechanical dimensions, thermal profiles, and reliability screening differ fundamentally; PCB layout and reflow profiles are not interchangeable.
What is the purpose of the integrated 33-Ω series resistors in the SNJ54BCT2240J?
The integrated 33-Ω series resistors in the SNJ54BCT2240J dampen signal-edge overshoot and undershoot on PCB traces, reducing radiated emissions and improving signal integrity in high-speed digital interfaces. These resistors eliminate the need for eight external 0402/0603 resistors per SNJ54BCT2240J, simplifying layout, lowering BOM cost, and enhancing reliability in vibration-prone military platforms where solder joint fatigue is a concern.
SNJ54BCT2240J 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:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
SNJ54BCT2240J FAQ
1.How can I place an order for SNJ54BCT2240J through Aetrix?
Please submit a Request for Quotation (RFQ) for SNJ54BCT2240J 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 SNJ54BCT2240J reliable?
The price and inventory of SNJ54BCT2240J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SNJ54BCT2240J is usually 5 days.
3.What payment methods are accepted for SNJ54BCT2240J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SNJ54BCT2240J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SNJ54BCT2240J?
SNJ54BCT2240J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SNJ54BCT2240J 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 SNJ54BCT2240J?
For technical support, including SNJ54BCT2240J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SNJ54BCT2240J requirements.
6.How does Aetrix verify that SNJ54BCT2240J is sourced from the original manufacturer or authorized distributors?
All SNJ54BCT2240J 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 SNJ54BCT2240J meets industry standards.
7.What is the process for return or replacement of SNJ54BCT2240J?
All SNJ54BCT2240J units undergo pre-shipment inspection (PSI). If there is an issue with SNJ54BCT2240J, 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 SNJ54BCT2240J part is unused and in its original packaging.
Return procedure for SNJ54BCT2240J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SNJ54BCT2240J Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
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…
