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Texas Instruments SNJ55462FK
- Part No.:
- SNJ55462FK
- Manufacturer:
- Texas Instruments
- Package:
- 20-CLCC
- Datasheet:
-
SNJ55462FK.pdf
- Description:
- DUAL HIGH-VOLTAGE, HIGH-CURRENT
- Quantity:
- Payment:
- Shipping:
Inventory:3,279
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Product details
Overview
SNJ55462FK from Texas Instruments is a military-grade dual high-voltage, high-current NAND peripheral driver IC designed for logic-level interfacing to power loads. It delivers 300 mA continuous output current per channel, supports 35 V off-state output voltage, operates across −55°C to 125°C, and features TTL-compatible diode-clamped inputs - enabling direct drive of relays, lamps, MOSFET gates, and solenoids in rugged industrial and defense systems.
For engineers reviewing the SNJ55462FK datasheet, SNJ55462FK pinout, SNJ55462FK application, or SNJ55462FK equivalent, this page provides verified functional identity, military-temperature LCCC package details, confirmed NAND logic behavior, absolute maximum ratings, and validated alternative options for high-breakdown-voltage peripheral driving applications.
Technical Context
The SNJ55462FK implements two independent NAND gate drivers with open-collector NPN transistor outputs, each internally connected to base-driven npn transistors. Its architecture enables direct interface between TTL/CMOS logic and high-voltage loads without external level-shifting circuitry.
It is characterized for full military temperature operation (−55°C to 125°C), features no latch-up at 30 V after conducting 300 mA, and uses internal resistor networks (e.g., 4 kΩ base resistors) to ensure stable saturation and turn-off under varying load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Dual 2-input NAND - positive-logic output active-low; Y = NOT(A AND B) |
| Output Current (Continuous) | 300 mA per channel - sufficient to directly drive medium-power relays or lamp loads |
| Off-State Output Voltage | 35 V - enables switching of 24 V industrial control rails with margin |
| Supply Voltage Range | 4.5 V to 5.5 V - compatible with standard 5 V TTL/CMOS logic supplies |
| Propagation Delay (tPHL/tPLH) | 30–65 ns - medium-speed switching suitable for <1 MHz control signaling |
| Operating Temperature | −55°C to 125°C - qualified for extended military and aerospace environments |
| Input Compatibility | TTL-compatible diode-clamped inputs - accepts standard 0.8 V / 2.0 V logic thresholds |
Pinout & Package
LCCC (Leadless Ceramic Chip Carrier) package, 20-pin, hermetically sealed, 8.89 mm × 8.89 mm body, 1.27 mm pitch, 2.03 mm max height, ceramic substrate with solderable metallized terminations. Designed for high-reliability, high-temperature PCB mounting with thermal stability and low moisture absorption.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A, 1B, 2A, 2B | Input terminals | Four TTL-compatible logic inputs - two per NAND gate (1A/1B → 1Y; 2A/2B → 2Y) |
| 1Y, 2Y | Output terminals | Open-collector NPN outputs - require external pull-up to load supply (e.g., 24 V) |
| VCC | Positive supply | 5 V logic supply pin - powers internal input clamping diodes and base resistors |
| GND | Ground reference | Common return for logic inputs and internal biasing network |
| NC (Pins 3,4,6,7,9,10,11,12,13,14,15,16,17,18,19) | No internal connection | 15 unconnected pins - mechanical support and thermal pad alignment only |
Key Features
| Feature | Design Value |
|---|---|
| No output latch-up at 30 V | Guaranteed robustness during transient overvoltage events while sourcing 300 mA |
| High-voltage output capability | 35 V off-state rating allows safe interface to 24 V DC control buses without external protection |
| Plastic DIP alternative with copper lead frame | Not applicable to SNJ55462FK - this FK variant uses ceramic LCCC for thermal and reliability advantage |
| TTL-compatible diode-clamped inputs | Enables direct connection to legacy 5 V logic without series resistors or level shifters |
| Military temperature qualification | Full −55°C to 125°C operation verified per MIL-STD-883, supporting avionics and ground vehicle systems |
Applications
| Industrial Relay Control | Aerospace Actuator Interface |
|---|---|
Use Scenario: Driving 24 VDC electromagnetic relays in programmable logic controller (PLC) output modules. IC Role / Device Role / Timing Role: Dual NAND gate driver providing isolated logic-to-power translation with open-collector outputs pulled to 24 V rail. Use Value: Eliminates need for discrete transistor buffers; 300 mA per channel ensures reliable relay coil energization across temperature extremes. |
Use Scenario: Controlling hydraulic valve solenoids in flight control surface actuation systems. IC Role / Device Role / Timing Role: High-reliability interface between FPGA-based flight computer and 28 V DC solenoid loads. Use Value: −55°C to 125°C operation and 35 V off-state rating meet DO-160 Section 22 surge immunity requirements. |
| Defense Vehicle Lamp Drivers | Test Equipment Load Switching |
Use Scenario: Switching incandescent warning lamps and indicator lights in armored vehicle command consoles. IC Role / Device Role / Timing Role: Dual-channel high-current driver converting 5 V microcontroller GPIO to 28 V lamp loads. Use Value: Diode-clamped TTL inputs tolerate noisy vehicle electrical environments; no latch-up prevents system lockup during load dump transients. |
Use Scenario: Automated test fixture sequencing of multiple DUT power domains using programmable 12–30 V supplies. IC Role / Device Role / Timing Role: Logic-controlled switch enabling/disabling power rails via external high-side MOSFETs or relay coils. Use Value: 20-pin LCCC package supports dense layout in space-constrained ATE backplanes; hermetic seal ensures long-term reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage NAND driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SNJ55462JG | Same logic function and military temp range, but 8-pin CDIP package (vs. 20-pin LCCC); lower power dissipation (1050 mW vs. 1375 mW at 25°C) | Preferred where through-hole assembly, manual rework, or legacy socket compatibility is required | Select SNJ55462JG when board-level repairability or existing CDIP footprint reuse is prioritized over thermal performance |
| SN75462P | Commercial-grade (0°C to 70°C), PDIP-8 package, RoHS-compliant NiPdAu finish, 1000 mW power rating at 25°C | Suitable for non-military industrial controls where extended temperature range is not required | Choose SN75462P for cost-sensitive, volume-manufactured equipment operating in benign environments |
Compared with SNJ55462JG and SN75462P, the SNJ55462FK offers superior thermal performance (1375 mW rating), hermetic ceramic packaging for harsh environments, and highest reliability assurance - making it the sole option qualified for sustained operation above 100°C or in high-humidity, high-vibration defense platforms.
Availability
SNJ55462FK is available at Aetrix Electronics and suitable for industrial relay control, aerospace actuator interface, defense vehicle lamp drivers, and automated test equipment requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for SNJ55462FK 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 decades of heritage in military and aerospace-grade IC development.
The SN55462 family belongs to TI's legacy high-voltage peripheral driver product line, engineered specifically for robust logic-to-power interfacing in mission-critical systems where breakdown voltage, latch-up immunity, and wide temperature operation are mandatory.
FAQ
What is the logic function of the SNJ55462FK?
The SNJ55462FK implements two independent 2-input NAND gates with open-collector NPN outputs. In positive logic, each output Y is low only when both inputs A and B are high (Y = NOT(A AND B)). This configuration enables wired-OR expansion and direct drive of external pull-up loads such as relays or lamps. The SNJ55462FK maintains this NAND behavior across its full −55°C to 125°C operating range.
Does the SNJ55462FK have built-in protection against latch-up?
Yes - the SNJ55462FK is explicitly characterized for no output latch-up at 30 V after conducting 300 mA, a key reliability feature confirmed in the SLRS022A datasheet. This means the device will not enter destructive parasitic thyristor conduction during overvoltage transients, even under full rated current. This behavior is intrinsic to its bipolar transistor output stage design and applies to the SNJ55462FK across its entire military temperature range.
What package type is used for the SNJ55462FK?
The SNJ55462FK uses a 20-pin Leadless Ceramic Chip Carrier (LCCC) package, designated FK. It measures 8.89 mm × 8.89 mm with 1.27 mm pin pitch and a maximum height of 2.03 mm. The ceramic body provides hermetic sealing, low moisture absorption, and excellent thermal stability - critical for high-reliability military and aerospace applications where the SNJ55462FK is deployed.
Can the SNJ55462FK drive a 24 V relay directly?
Yes - the SNJ55462FK can directly drive a 24 V relay coil when configured with an external pull-up resistor from the open-collector output (1Y or 2Y) to the 24 V rail. Its 300 mA continuous output current rating and 35 V off-state voltage rating provide sufficient margin for typical 24 V relay coils drawing ≤200 mA. The SNJ55462FK's TTL-compatible inputs accept standard 5 V logic signals without additional conditioning.
How does the SNJ55462FK differ from the SN75462P?
The SNJ55462FK is the military-grade version with −55°C to 125°C operation, LCCC ceramic packaging, and SnPb lead finish, while the SN75462P is commercial-grade (0°C to 70°C), uses plastic DIP-8 packaging, and has RoHS-compliant NiPdAu finish. The SNJ55462FK offers higher power dissipation (1375 mW vs. 1000 mW), hermetic sealing, and QML certification - making it suitable for defense and aerospace use where the SN75462P is limited to benign industrial environments.
SNJ55462FK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-CLCC
- Packaging:
- Tube
- Product Status:
- Active
- Logic Type:
- Peripheral Driver
- Number of Elements:
- 2
- Number of Bits per Element:
- 1
- Input Type:
- -
- Output Type:
- Open Collector
- Current - Output High, Low:
- 300µA, 300mA
- 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)
SNJ55462FK FAQ
1.How can I place an order for SNJ55462FK through Aetrix?
Please submit a Request for Quotation (RFQ) for SNJ55462FK 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 SNJ55462FK reliable?
The price and inventory of SNJ55462FK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SNJ55462FK is usually 5 days.
3.What payment methods are accepted for SNJ55462FK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SNJ55462FK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SNJ55462FK?
SNJ55462FK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SNJ55462FK 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 SNJ55462FK?
For technical support, including SNJ55462FK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SNJ55462FK requirements.
6.How does Aetrix verify that SNJ55462FK is sourced from the original manufacturer or authorized distributors?
All SNJ55462FK 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 SNJ55462FK meets industry standards.
7.What is the process for return or replacement of SNJ55462FK?
All SNJ55462FK units undergo pre-shipment inspection (PSI). If there is an issue with SNJ55462FK, 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 SNJ55462FK part is unused and in its original packaging.
Return procedure for SNJ55462FK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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