Overview
The SN75454BPG4 is a dual-peripheral driver from Texas Instruments, part of the SN7545xB family. These devices are designed for use in systems that employ TTL (Transistor-Transistor Logic) and are functionally interchangeable with and replace the earlier SN75450 and SN75450A families. The SN75454B specifically functions as a NOR logic gate with open-collector outputs, making it suitable for high-current, high-speed switching applications.
The device is characterized for operation over a commercial temperature range of 0°C to 70°C, ensuring reliability in various environmental conditions. It features diode-clamped inputs to simplify circuit design and prevent latch-up, even at high voltages and currents.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC (Supply Voltage) | 4.75 | 5 | 5.25 | V |
| VI (Input Voltage) | - | - | 5.5 | V |
| VO (Off-state Output Voltage) | - | - | 30 | V |
| IOK (Continuous Collector or Output Current) | - | - | 400 | mA |
| Peak Collector or Output Current (tw ≤10 ms, duty cycle ≤50%) | - | - | 500 | mA |
| TA (Operating Free-Air Temperature) | 0 | - | 70 | °C |
| TJ (Operating Virtual Junction Temperature) | - | - | 150 | °C |
| tPLH (Propagation Delay Time, Low-to-High-Level Output) | 27 | - | 35 | ns |
| tPHL (Propagation Delay Time, High-to-Low-Level Output) | 27 | - | 35 | ns |
Key Features
- Characterized for use up to 300 mA
- High-voltage outputs up to 30 V
- No output latch-up at 20 V after conducting 300 mA
- High-speed switching capabilities
- Open-collector outputs
- TTL-compatible diode-clamped inputs
- Standard supply voltages
- Circuit flexibility for varied applications
Applications
- High-speed logic buffers
- Power drivers
- Lamp drivers
- LED drivers
- Line drivers
- Memory drivers
Q & A
- What is the operating temperature range for the SN75454B?
The SN75454B operates over a temperature range of 0°C to 70°C.
- What is the maximum continuous collector or output current for the SN75454B?
The maximum continuous collector or output current is 400 mA.
- What is the maximum peak collector or output current for the SN75454B?
The maximum peak collector or output current is 500 mA (for tw ≤10 ms, duty cycle ≤50%).
- What type of logic gate does the SN75454B implement?
The SN75454B implements a NOR logic gate.
- What are the typical propagation delay times for the SN75454B?
The typical propagation delay times are 27-35 ns for both low-to-high and high-to-low level outputs.
- What is the recommended supply voltage for the SN75454B?
The recommended supply voltage is between 4.75 V and 5.25 V.
- Why are diode-clamped inputs important in the SN75454B?
Diode-clamped inputs simplify circuit design and prevent latch-up, even at high voltages and currents.
- What are some common applications for the SN75454B?
Common applications include high-speed logic buffers, power drivers, lamp drivers, LED drivers, line drivers, and memory drivers.
- How should the VCC pin be treated in terms of power supply?
The VCC pin should have a bypass capacitor to prevent power disturbances.
- What are the layout guidelines for using the SN75454B?
Thin traces can be used on the input due to low-current logic. Separate input channels to eliminate crosstalk, and use a bypass capacitor on the VCC pin.
