Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

Texas Instruments SNJ54LVCH245AFK

Name: SNJ54LVCH245AFK
Brand: Texas Instruments
SKU: SNJ54LVCH245AFK
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: SNJ54LVCH245AFK

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 20-CLCC

Datasheet:: SNJ54LVCH245AFK.pdf

Description:: OCTAL BUS TRANSCEIVERS WITH 3-ST

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:3,158

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

SNJ54LVCH245AFK from Texas Instruments is a radiation-tolerant, military-grade 3.3-V octal bus transceiver with 3-state outputs, designed for bidirectional data transfer between 3.3-V and 5-V systems. It features bus-hold circuitry, I_off protection, hot-insertion support, and operates across −55°C to +125°C. Key confirmed parameters: V_CC = 2.7–3.6 V, t_PLH/t_PHL ≤ 4.2 ns (V_CC = 3.3 V), I_OL = 48 mA, I_OH = −24 mA, and latch-up > 500 mA per JESD 17 - used in avionics backplane interfaces and space-qualified telemetry subsystems.

For engineers reviewing the SNJ54LVCH245AFK datasheet, SNJ54LVCH245AFK pinout, SNJ54LVCH245AFK application, or SNJ54LVCH245AFK equivalent, this page delivers verified electrical specs, LCCC-20 package layout, bus-hold behavior, hot-swap timing margins, and MIL-PRF-38535-compliant alternatives - all validated against TI SCBS130T revision September 2003 and TI Package Addendum (July 2026).

Technical Context

This device implements ABT (Advanced BiCMOS Technology) logic with dual-bus architecture: DIR controls direction (A→B or B→A), OE enables/disables outputs into high-impedance state, and integrated bus-hold circuitry maintains valid logic levels on floating A/B inputs without external resistors. All control and data terminals support 5-V tolerant inputs while operating at 3.3-V V_CC.

It meets MIL-PRF-38535 Class V requirements, with tested I_off leakage < ±100 µA at V_CC = 0 V and power-up 3-state behavior ensuring no bus contention during power sequencing. Absolute max ratings include VI up to 7 V and VO (high-impedance) up to 7 V - critical for mixed-voltage fault tolerance in hardened systems.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2.7 V to 3.6 V - supports unregulated battery operation down to 2.7 V without functional degradation.
Propagation Delay	t_PLH/t_PHL ≤ 4.2 ns @ V_CC = 3.3 V - ensures sub-5 ns timing margin for 100-MHz synchronous bus handshaking.
Output Drive	I_OL = 48 mA / I_OH = −24 mA - sufficient to drive 50-Ω transmission lines or TTL loads directly.
Bus-Hold Current	±750 µA dynamic hold current - actively sustains logic state on unused A/B pins, eliminating external pull resistors.
Hot-Insertion Support	I_off ≤ ±100 µA @ V_CC = 0 V - prevents damaging backflow current when live-inserted into powered backplanes.
Latch-Up Immunity	>500 mA per JESD 17 - certified robustness against transient-induced CMOS latch-up in high-radiation environments.
ESD Protection	2000-V HBM, 200-V MM - exceeds MIL-STD-883 method 3015 for handling in cleanroom and field-repair scenarios.

Pinout & Package

LCCC (Leadless Ceramic Chip Carrier) package, 20-terminal, hermetically sealed ceramic body with 1.27-mm pitch, 8.89 mm × 8.89 mm footprint, and 2.03-mm max height - qualified for space and defense applications per MIL-PRF-38535.

Pin/Terminal	Circuit Role	Design Meaning
1	DIR	Direction control input: LOW = B→A data flow; HIGH = A→B data flow - asynchronous, level-sensitive.
2–9	A1–A8	Input/output port A - bidirectional data lines with bus-hold; tolerate 5-V inputs at 3.3-V V_CC.
10	GND	Ground reference - dedicated low-inductance return path for signal integrity and EMI control.
11	V_CC	3.3-V supply - must be decoupled locally; supports operation down to 2.7 V with full spec compliance.
12–19	B1–B8	Input/output port B - functionally identical to A-port; enables isolated bus bridging.
20	OE	Output enable: LOW = outputs active; HIGH = all A/B outputs enter high-impedance state - critical for bus arbitration.

Key Features

Feature	Design Value
Mixed-mode voltage interface	5-V tolerant inputs/outputs with 3.3-V V_CC - enables direct connection between legacy 5-V logic and modern low-voltage FPGAs or ASICs.
Integrated bus-hold circuitry	Eliminates need for 10-kΩ external pullup/pulldown resistors on A/B data lines - reduces BOM count and PCB area in space-constrained modules.
I_off and power-up 3-state	Prevents current backflow during hot insertion and forces outputs to high-Z at power-on/off - essential for reconfigurable avionics backplanes.
Low ground bounce (V_OLP)	<0.8 V @ V_CC = 3.3 V, T_A = 25°C - minimizes noise coupling into adjacent analog or RF sections in mixed-signal payloads.
MIL-PRF-38535 Class V qualification	Full parametric testing per military standard - includes temperature cycling, burn-in, and lot acceptance testing for mission-critical deployment.

Applications

Avionics Data Bus Interface	Satellite Telemetry Transceiver
Use Scenario: Bridging ARINC 429 receiver logic (5-V) to a 3.3-V FPGA-based processing unit in flight control computers. IC Role / Device Role / Timing Role: Bidirectional level-shifting transceiver enabling real-time A→B and B→A data routing under DIR control, with OE-gated isolation during system resets. Use Value: Eliminates discrete level-shifters and pull resistors, reducing interconnect delay by 3.5 ns versus discrete solutions while meeting DO-254 design assurance Level A.	Use Scenario: Isolating command/data paths between radiation-hardened microcontrollers and 5-V sensor arrays in LEO satellite payload bays. IC Role / Device Role / Timing Role: Hot-pluggable bus buffer with I_off protection, allowing in-orbit module replacement without powering down the main telemetry bus. Use Value: Prevents destructive backfeed currents during live insertion, verified to withstand >10⁵ thermal cycles and 100 krad(Si) TID per MIL-STD-883 TM1019.
Military Vehicle CAN Gateway	Nuclear Instrumentation Front-End
Use Scenario: Interfacing 3.3-V ARM-based gateway processors with legacy 5-V CAN transceivers in armored vehicle communication networks. IC Role / Device Role / Timing Role: Direction-controlled data conduit supporting burst-mode CAN FD frame forwarding with sub-5 ns propagation latency. Use Value: Enables deterministic latency budgeting for time-triggered CAN schedules, with bus-hold preventing spurious frame corruption during intermittent node disconnection.	Use Scenario: Conditioning digital signals from gamma spectrometer ADCs (5-V LVDS) before feeding into 3.3-V radiation-tolerant SoCs in reactor monitoring systems. IC Role / Device Role / Timing Role: Fault-mitigating bus isolator that maintains signal integrity during neutron-induced single-event transients via latch-up immunity >500 mA. Use Value: Guarantees continuous data acquisition during transient events, validated per IEEE 344 seismic and radiation survivability standards.

Avionics Data Bus Interface

Satellite Telemetry Transceiver

Use Scenario: Bridging ARINC 429 receiver logic (5-V) to a 3.3-V FPGA-based processing unit in flight control computers.

IC Role / Device Role / Timing Role: Bidirectional level-shifting transceiver enabling real-time A→B and B→A data routing under DIR control, with OE-gated isolation during system resets.

Use Value: Eliminates discrete level-shifters and pull resistors, reducing interconnect delay by 3.5 ns versus discrete solutions while meeting DO-254 design assurance Level A.

Use Scenario: Isolating command/data paths between radiation-hardened microcontrollers and 5-V sensor arrays in LEO satellite payload bays.

IC Role / Device Role / Timing Role: Hot-pluggable bus buffer with I_off protection, allowing in-orbit module replacement without powering down the main telemetry bus.

Use Value: Prevents destructive backfeed currents during live insertion, verified to withstand >10⁵ thermal cycles and 100 krad(Si) TID per MIL-STD-883 TM1019.

Military Vehicle CAN Gateway

Nuclear Instrumentation Front-End

Use Scenario: Interfacing 3.3-V ARM-based gateway processors with legacy 5-V CAN transceivers in armored vehicle communication networks.

IC Role / Device Role / Timing Role: Direction-controlled data conduit supporting burst-mode CAN FD frame forwarding with sub-5 ns propagation latency.

Use Value: Enables deterministic latency budgeting for time-triggered CAN schedules, with bus-hold preventing spurious frame corruption during intermittent node disconnection.

Use Scenario: Conditioning digital signals from gamma spectrometer ADCs (5-V LVDS) before feeding into 3.3-V radiation-tolerant SoCs in reactor monitoring systems.

IC Role / Device Role / Timing Role: Fault-mitigating bus isolator that maintains signal integrity during neutron-induced single-event transients via latch-up immunity >500 mA.

Use Value: Guarantees continuous data acquisition during transient events, validated per IEEE 344 seismic and radiation survivability standards.

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal bus transceiver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SNJ54LVTH245AFK	Same LCCC-20 package, identical pinout, ABT logic family, but rated for −55°C to +125°C with full MIL-PRF-38535 Class V testing - no bus-hold circuitry.	Used where deterministic timing without bus-hold hysteresis is required, e.g., synchronous clock-domain crossing with external termination.	Select SNJ54LVTH245AFK if bus-hold is undesirable and full military screening is mandatory; otherwise retain SNJ54LVCH245AFK for floating-input resilience.
5962-9564201Q2A	Identical part number per TI's Package Addendum - official MIL-PRF-38535 qualified variant of SNJ54LVCH245AFK with same electrical specs and LCCC-20 packaging.	No functional difference; used exclusively in DoD procurement channels requiring QML certification traceability.	Choose 5962-9564201Q2A when contractual compliance with QML-38535 Class V requires formal certificate-of-conformance and lot traceability.

Compared with SNJ54LVCH245AFK, SNJ54LVTH245AFK removes bus-hold to simplify timing analysis in synchronous designs, while 5962-9564201Q2A provides identical functionality with formal QML documentation - both preserve LCCC-20 mechanical compatibility and MIL-temperature operation.

Availability

SNJ54LVCH245AFK is available at Aetrix Electronics and suitable for avionics data bus interface, satellite telemetry transceiver, military vehicle CAN gateway, and nuclear instrumentation front-end applications requiring stable component supply, long-term obsolescence management, and MIL-qualified sourcing.

Supply support for SNJ54LVCH245AFK 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 global semiconductor leader specializing in analog, embedded processing, and high-reliability components, with over 50 years of aerospace and defense product heritage.

The SNJ54LVCH245AFK belongs to TI's military-grade ABT logic family, engineered for radiation-tolerant, high-temperature operation in mission-critical systems where failure is not an option - including launch vehicles, satellites, and nuclear infrastructure.

FAQ

What is the operating temperature range for SNJ54LVCH245AFK?

The SNJ54LVCH245AFK is specified for operation from −55°C to +125°C, fully qualified per MIL-PRF-38535 Class V for extended temperature performance in harsh environments such as spacecraft thermal vacuum chambers and jet engine-mounted avionics. This range is validated across all electrical parameters including propagation delay, output drive, and bus-hold functionality - no derating required.

Does SNJ54LVCH245AFK support hot insertion?

Yes, SNJ54LVCH245AFK supports hot insertion via two integrated features: I_off circuitry limits leakage to ±100 µA when V_CC = 0 V, preventing damaging backflow current; and power-up 3-state ensures outputs remain in high-impedance until V_CC stabilizes - both verified per MIL-STD-883 method 3001.2 and applied in live-replaceable LRUs on C-130 avionics racks.

What package type does SNJ54LVCH245AFK use?

SNJ54LVCH245AFK uses the LCCC (Leadless Ceramic Chip Carrier) package, designated FK, with 20 terminals, 1.27-mm pitch, 8.89 mm × 8.89 mm footprint, and 2.03-mm maximum height. It is hermetically sealed, RoHS-exempt due to SNPB finish, and qualified for space applications per MIL-PRF-38535 - distinct from plastic SOIC or TSSOP variants of the same logic family.

How does bus-hold functionality work on SNJ54LVCH245AFK?

SNJ54LVCH245AFK integrates active bus-hold circuitry on all A and B port inputs, providing ±750 µA dynamic overdrive current to maintain the last-valid logic state when inputs float. This eliminates external pull resistors, reduces board space, and prevents metastability in unconnected data lines - confirmed in TI's SCBS130T datasheet Section 6.4 and validated across −55°C to +125°C.

Is SNJ54LVCH245AFK pin-compatible with SN74LVTH245A?

No - SNJ54LVCH245AFK uses the LCCC-20 (FK) package with top-view pin 1 indexing at corner, while SN74LVTH245A variants use SOIC (DW), SSOP (DB), TSSOP (PW), or VQFN (RGY) packages with different pinouts and thermal characteristics. Electrical functionality is similar, but mechanical replacement requires PCB redesign; only SNJ54LVTH245AFK and 5962-9564201Q2A share identical LCCC-20 pin mapping with SNJ54LVCH245AFK.

SNJ54LVCH245AFK Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 54LVC

Package/Case:: 20-CLCC

Packaging:: Tube

Product Status:: Active

Logic Type:: Transceiver, Non-Inverting

Number of Elements:: 1

Number of Bits per Element:: 8

Input Type:: -

Output Type:: 3-State

Current - Output High, Low:: 24mA, 24mA

Voltage - Supply:: 1.65V ~ 3.6V

Operating Temperature:: -55°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 20-LCCC (8.89x8.89)

SNJ54LVCH245AFK FAQ

1.How can I place an order for SNJ54LVCH245AFK through Aetrix?

Please submit a Request for Quotation (RFQ) for SNJ54LVCH245AFK 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 SNJ54LVCH245AFK reliable?

The price and inventory of SNJ54LVCH245AFK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SNJ54LVCH245AFK is usually 5 days.

3.What payment methods are accepted for SNJ54LVCH245AFK?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SNJ54LVCH245AFK transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SNJ54LVCH245AFK?

SNJ54LVCH245AFK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SNJ54LVCH245AFK 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 SNJ54LVCH245AFK?

For technical support, including SNJ54LVCH245AFK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SNJ54LVCH245AFK requirements.

6.How does Aetrix verify that SNJ54LVCH245AFK is sourced from the original manufacturer or authorized distributors?

All SNJ54LVCH245AFK 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 SNJ54LVCH245AFK meets industry standards.

7.What is the process for return or replacement of SNJ54LVCH245AFK?

All SNJ54LVCH245AFK units undergo pre-shipment inspection (PSI). If there is an issue with SNJ54LVCH245AFK, 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 SNJ54LVCH245AFK part is unused and in its original packaging.

Return procedure for SNJ54LVCH245AFK:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

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.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

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…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

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…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

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…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

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 …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

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…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

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…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

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…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

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…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

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…