My Inquiry
My Account
Texas Instruments SNJ55114FK
- Part No.:
- SNJ55114FK
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 20-CLCC
- Datasheet:
-
SNJ55114FK.pdf
- Description:
- IC TRANSCEIVER 2/0 20LCCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,509
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SNJ55114FK from Texas Instruments is a military-grade dual differential line driver IC designed for balanced transmission over twisted-pair or coaxial lines in harsh environments. It features two independent TTL-compatible drivers with totem-pole outputs, triple-input logic (A/B/C), ±40 mA output drive capability, and operation across –55°C to 125°C. It is used in avionics data buses and ground-based radar interface systems requiring high-reliability differential signaling.
For engineers reviewing the SNJ55114FK datasheet, SNJ55114FK pinout, SNJ55114FK application, or SNJ55114FK equivalent, key selection criteria include its LCCC-20 military packaging, open-collector/open-emitter flexibility, differential AND/NAND output configuration, short-circuit protection, and compatibility with SN55115 receivers in full-duplex line-driver/receiver pairs.
Technical Context
The SNJ55114FK implements two identical differential driver channels, each with three inputs (A, B, C) controlling complementary Y (AND) and Z (NAND) outputs. Each channel's output stage provides active pullup (YP/ZP) and sink (YS/ZS) terminals on adjacent pins, enabling external configuration as open-collector, open-emitter, or totem-pole.
It operates from a single 4.5–5.5 V supply, delivers TTL-compatible VOH ≥ 2.4 V at –40 mA and VOL ≤ 0.4 V at 40 mA, and integrates input/output clamp diodes for ESD robustness. Its propagation delay is 11–20 ns (tPHL/tPLH) at 25°C with 30 pF load, and it draws 37–50 mA ICC (both drivers, VCC = 5.5 V, inputs grounded).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Enables direct integration into legacy 5-V military logic systems without level-shifting. |
| Output Drive Current | ±40 mA - Sufficient to drive 100-Ω twisted-pair lines with minimal signal degradation under load. |
| Propagation Delay | 11–20 ns - Supports data rates up to ~30 Mbps in point-to-point or party-line bus topologies. |
| Operating Temperature | –55°C to 125°C - Qualified for extended-range deployment in airborne, missile, and space-qualified electronics. |
| Input Logic Compatibility | TTL - Direct interfacing with standard 74LS/AS logic families without additional buffering. |
| Short-Circuit Protection | –40 to –120 mA sink / +40 to +120 mA source - Limits fault current during line shorts, preventing latch-up or thermal runaway. |
| Package Type | LCCC-20 (FK) - Hermetically sealed ceramic package with leadless construction for high-reliability, low-inductance mounting in vibration-prone systems. |
Pinout & Package
LCCC-20 (FK) package: 8.89 mm × 8.89 mm ceramic chip carrier with 1.27 mm pitch, no leads, soldered via perimeter terminations. Designed for high-temperature, high-reliability PCB assembly with 260°C reflow tolerance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1ZP, 2ZP | Active Pullup Terminal (Z-output) | Connects to external VCC or pullup resistor to configure Z output as open-collector or totem-pole. |
| 1ZS, 2ZS | Sink Output Terminal (Z-output) | Drives low-level signal; paired with ZP to form complete totem-pole or open-collector output stage. |
| 1YP, 2YP | Active Pullup Terminal (Y-output) | Enables configurable Y output polarity and drive mode - critical for differential pair termination control. |
| 1YS, 2YS | Sink Output Terminal (Y-output) | Provides high-current sinking path for Y output; supports rail-to-rail swing when combined with YP. |
| 1A–1C, 2A–2C | Triple Logic Inputs per Channel | Enable AND/NAND logic function selection per driver; A/B/C inputs determine Y=AB·C and Z=¬(AB·C) behavior. |
| VCC (Pin 15) | Positive Supply | Single 5-V rail powers both drivers and internal logic; decoupling required within 1 cm due to fast edge rates. |
| GND (Pin 8) | Ground Reference | Common return for all inputs, outputs, and internal circuitry; must be low-impedance plane for noise immunity. |
| NC (Pins 3, 7, 10, 11, 12, 13) | No Internal Connection | Unbonded die pads - left unconnected; not usable for thermal relief or grounding without validation. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel differential driver architecture | Two independent drivers support simultaneous transmit/receive or redundant signaling paths in full-duplex links. |
| Configurable output topology (totem-pole/open-collector/open-emitter) | Per-pin YP/YS and ZP/ZS terminals allow hardware-selectable drive modes without redesigning PCB layout. |
| TTL-compatible input and output levels | Direct drop-in replacement for legacy 74-series line drivers; eliminates need for level translators in mixed-voltage systems. |
| Integrated input/output clamp diodes | Protects against ±1.5 V input overvoltage and 6.5 V output overvoltage, enhancing survivability in noisy EMI environments. |
| MIL-PRF-38535 Class K qualification | Meets QML requirements for defense/aerospace applications including screening, burn-in, and lot traceability. |
Applications
| Avionics Data Bus Interface | Radar Transmitter Control Link |
|---|---|
|
Use Scenario: Transmitting command and status signals between flight control computer and remote I/O modules over 10–30 m shielded twisted-pair in fighter aircraft. IC Role / Device Role / Timing Role: Differential line driver converting TTL logic commands into balanced, noise-immune signals compliant with MIL-STD-1553B physical layer requirements. Use Value: Immunity to common-mode EMI exceeding 200 V/m enables reliable operation during high-power RF transmission events. |
Use Scenario: Driving differential enable/control lines to high-power T/R modules in ground-based phased-array radar transmitters. IC Role / Device Role / Timing Role: High-current driver providing precise timing-aligned gate control for GaN HEMT amplifiers with sub-20 ns edge fidelity. Use Value: ±40 mA drive ensures <10 ns rise/fall times into 50 Ω loads, minimizing pulse distortion in pulsed RF systems. |
| Secure Ground Communication Node | Munitions Firing Circuit Interface |
|
Use Scenario: Interfacing encrypted data terminals to field-deployable radio modems using balanced baseband signaling over armored cable. IC Role / Device Role / Timing Role: Dual driver generating complementary logic streams for Manchester-encoded transmission, synchronized with SN55115 receiver. Use Value: Wide temperature range (–55°C to 125°C) guarantees operation in desert or arctic conditions without derating. |
Use Scenario: Isolating and driving firing initiation signals from safety interlock logic to pyrotechnic squibs in guided munitions. IC Role / Device Role / Timing Role: Robust driver delivering fail-safe, short-circuit-protected pulses to initiate detonation sequences with deterministic timing. Use Value: Built-in short-circuit current limiting prevents false triggering due to wiring faults or moisture ingress in sealed ordnance housings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual differential line driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SNJ55114J | CDIP-16 package (16-pin ceramic DIP); same electrical specs and temp range; lower thermal resistance but larger footprint. | Better manual prototyping and socket-based testing; less suitable for high-vibration or high-density layouts. | Select SNJ55114J for lab validation or legacy board upgrades where through-hole mounting is retained. |
| DS9614M | National Semiconductor pinout-compatible variant; identical logic function and drive strength; rated –55°C to 125°C, but not QML-qualified. | Acceptable for non-military industrial systems; lacks MIL-PRF-38535 screening and lot traceability documentation. | Choose DS9614M only for cost-sensitive commercial designs where QML certification is not mandated. |
Compared with SNJ55114J and DS9614M, the SNJ55114FK offers superior mechanical ruggedness via LCCC packaging, tighter thermal management for sustained high-current operation, and full QML-38535 Class K compliance - making it the sole choice for flight-critical and ordnance applications.
Availability
SNJ55114FK is available at Aetrix Electronics and suitable for avionics data buses, radar transmitter control links, secure ground communication nodes, and munitions firing circuit interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SNJ55114FK 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 for aerospace, defense, and industrial markets.
The SN55114 product line was developed to meet MIL-STD-883 requirements for differential line drivers in mission-critical systems, emphasizing radiation tolerance, thermal stability, and interoperability with SN55115 receivers.
FAQ
What is the maximum operating temperature of the SNJ55114FK?
The SNJ55114FK is characterized for continuous operation from –55°C to 125°C. This full military temperature range is validated per MIL-PRF-38535 requirements and confirmed by thermal testing across all electrical parameters, including VOH/VOL, propagation delay, and short-circuit current limits. The SNJ55114FK maintains specification compliance throughout this range without derating.
Does the SNJ55114FK support open-collector output configuration?
Yes, the SNJ55114FK supports open-collector outputs via its dedicated YP/YS and ZP/ZS terminal pairs. By leaving YP and ZP unconnected and driving only YS and ZS, the device functions as an open-collector driver. This configuration is explicitly documented in the functional description and schematic diagram of the SNJ55114FK datasheet.
Is the SNJ55114FK pin-compatible with the SN75114 series?
No, the SNJ55114FK is not pin-compatible with SN75114 variants. SNJ55114FK uses a 20-pin LCCC (FK) package with unique pin assignments including NC pins and split power/ground distribution, whereas SN75114 uses 16-pin SOIC (D), PDIP (N), or CDIP (J) packages with different pinouts and thermal pad configurations.
Can the SNJ55114FK drive a 100-Ω twisted-pair line directly?
Yes, the SNJ55114FK can drive a 100-Ω twisted-pair line directly. Its ±40 mA output current capability ensures adequate voltage swing (≥2.4 V VOH, ≤0.4 V VOL) into 100 Ω loads, and its differential output structure matches standard balanced line impedances. Application Figure 11 in the SNJ55114FK datasheet confirms use with RT = ZO = 100 Ω termination.
What is the purpose of the NC pins on the SNJ55114FK?
The NC pins (3, 7, 10, 11, 12, 13) on the SNJ55114FK have no internal connection to the die and must remain unconnected. They result from the LCCC-20 package adaptation of the core die layout and are not intended for grounding, thermal relief, or signal routing. Connecting them may cause parasitic coupling or violate hermetic seal integrity.
SNJ55114FK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-CLCC
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Driver
- Protocol:
- -
- Number of Drivers/Receivers:
- 2/0
- Duplex:
- -
- Receiver Hysteresis:
- -
- Data Rate:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-LCCC (8.89x8.89)
SNJ55114FK FAQ
1.How can I place an order for SNJ55114FK through Aetrix?
Please submit a Request for Quotation (RFQ) for SNJ55114FK 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 SNJ55114FK reliable?
The price and inventory of SNJ55114FK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SNJ55114FK is usually 5 days.
3.What payment methods are accepted for SNJ55114FK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SNJ55114FK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SNJ55114FK?
SNJ55114FK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SNJ55114FK 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 SNJ55114FK?
For technical support, including SNJ55114FK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SNJ55114FK requirements.
6.How does Aetrix verify that SNJ55114FK is sourced from the original manufacturer or authorized distributors?
All SNJ55114FK 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 SNJ55114FK meets industry standards.
7.What is the process for return or replacement of SNJ55114FK?
All SNJ55114FK units undergo pre-shipment inspection (PSI). If there is an issue with SNJ55114FK, 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 SNJ55114FK part is unused and in its original packaging.
Return procedure for SNJ55114FK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SNJ55114FK Tags
-
ATA6561-GAQW-N
Microchip Technology
-
ATA6561-GBQW-N
Microchip Technology
-
AM26LS32ACDR
Texas Instruments
-
SP485CN-L/TR
MaxLinear, Inc.
-
SP485EN-L/TR
MaxLinear, Inc.
-
SP485EEN-L/TR
MaxLinear, Inc.
-
SP485ECN-L/TR
MaxLinear, Inc.
-
THVD1400DR
Texas Instruments
-
AM26C31IDR
Texas Instruments
-
TLIN1021ADRQ1
Texas Instruments
-
MAX232IDR
Texas Instruments
-
AM26C32IDR
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…
