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| Product attributes | Property Value |
| Manufacturer | Texas Instruments |
| Product Series | |
| Packaging | | |
| Part Status | Active |
| Logic Type | Buffer, Non-Inverting |
| Number of Elements | 6 |
| Number of Bits per Element | 1 |
| Input Type | - |
| Output Type | Open Collector |
| Current - Output High, Low | 250µA, 30mA |
| Voltage - Supply | 4.5V ~ 5.5V |
| Operating Temperature | -55°C ~ 125°C (TA) |
| Grade | - |
| Qualification | - |
| Mounting Type | Surface Mount |
| Package / Case | 20-CLCC |
| Supplier Device Package | 20-CLCC |
| ROHS |  |
The SNJ5407FK is a robust non-inverting hex buffer from Texas Instruments, featuring open-collector outputs for high-voltage switching applications. With six independent channels, each capable of sinking 30mA, it can directly drive relays, lamps, and LEDs. The device operates from a 4.5V to 5.5V supply, while the output stage can handle voltages up to 30V via an external pull-up resistor. Packaged in a 20-CLCC ceramic package, it is designed for military and aerospace applications, functioning reliably across the full -55°C to 125°C temperature range. This buffer is essential for interfacing 5V logic with higher-voltage peripherals.
- High-Voltage Output Capability (30V): Allows direct control of loads that operate at voltages far exceeding the logic supply.
- High Sink Current (30mA): Provides sufficient drive for relays, solenoids, and high-intensity LEDs.
- Open-Collector Design: Enables wired-OR logic and flexible level shifting to any desired voltage.
- Military Temperature Range: Ensures dependable performance in extreme thermal conditions.
Driving High-Voltage Displays
In avionics cockpit displays, the SNJ5407FK's open-collector outputs can switch up to 30V, enabling direct control of segmented VFD or incandescent indicators without additional driver transistors.
Interfacing with Relay Coils
For industrial control systems, this buffer can sink the 30mA required by many relay coils. An external flyback diode protects the output during inductive kickback, ensuring long-term reliability.
Level Shifting to Higher Voltages
By connecting the pull-up resistor to a 12V or 24V rail, this IC translates 5V logic signals to higher voltage levels, simplifying communication with legacy industrial sensors and actuators.
Driving LED Arrays
In high-brightness indicator panels, each of the 6 channels can sink 30mA, allowing direct drive of multiple LEDs in series or parallel, reducing component count and board space.
Bus Signal Buffering with Wired-OR Logic
The open-collector outputs can be tied together to implement wired-OR logic, enabling multiple sources to share a single interrupt or status line without bus contention.
Automotive ECU Output Stages
In harsh automotive environments, this buffer's wide temperature range and high-voltage capability make it suitable for driving solenoids and warning lamps in engine control units.
- Q: What is the logic family of the SNJ5407FK?
- A: It is a standard 5407 series TTL logic device, designed for high-voltage open-collector applications.
- Q: What is the function of this IC?
- A: It is a non-inverting buffer with 6 channels, used to drive high-voltage loads like relays or lamps.
- Q: What type of output does it have?
- A: It features an Open Collector output, requiring an external pull-up resistor to set the high-level voltage.
- Q: What is the operating voltage range?
- A: The supply voltage is 4.5V to 5.5V, while the output can handle up to 30V through the pull-up resistor.
- Q: What is the output current capability?
- A: It can sink up to 30mA, making it suitable for driving inductive or resistive loads.
- Q: What package is available?
- A: This model comes in a 20-CLCC ceramic package, ideal for high-reliability and space-constrained designs.
SNJ5407FK.pdf
- Q: What is the logic family of the SNJ5407FK?
- A: It is a standard 5407 series TTL logic device, designed for high-voltage open-collector applications.
- Q: What is the function of this IC?
- A: It is a non-inverting buffer with 6 channels, used to drive high-voltage loads like relays or lamps.
- Q: What type of output does it have?
- A: It features an Open Collector output, requiring an external pull-up resistor to set the high-level voltage.
- Q: What is the operating voltage range?
- A: The supply voltage is 4.5V to 5.5V, while the output can handle up to 30V through the pull-up resistor.
- Q: What is the output current capability?
- A: It can sink up to 30mA, making it suitable for driving inductive or resistive loads.
- Q: What package is available?
- A: This model comes in a 20-CLCC ceramic package, ideal for high-reliability and space-constrained designs.