Overview
The SN64BCT25244DWRE4 is a 25-Ω octal buffer and line driver produced by Texas Instruments. This device is designed to enhance the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented transceivers. It features a state-of-the-art BiCMOS design that significantly reduces the quiescent current (ICCZ). The device operates over a wide temperature range from −40°C to 85°C and is characterized for reliable system operation.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Supply Voltage (VCC) | 4.5 | 5 | 5.5 | V |
| High-Level Input Voltage (VIH) | 2 | V | ||
| Low-Level Input Voltage (VIL) | 0.8 | V | ||
| High-Level Output Current (IOH) | -80 | mA | ||
| Low-Level Output Current (IOL) | 188 | mA | ||
| Operating Free-Air Temperature (TA) | -40 | 85 | °C | |
| Propagation Delay Time (tPLH) A to Y | 1 | 3.2 | 4.9 | ns |
| Propagation Delay Time (tPHL) A to Y | 2 | 4 | 5.6 | ns |
Key Features
- State-of-the-Art BiCMOS Design: Significantly reduces ICCZ (quiescent current) for lower power consumption.
- High-Impedance State During Power Up and Power Down: Outputs are in a high-impedance state while the supply voltage is less than approximately 3 V.
- ESD Protection: Exceeds 2000 V per MIL-STD-883C, Method 3015, and 200 V using the machine model (C = 200 pF, R = 0).
- Incident-Wave Switching: Designed to facilitate incident-wave switching for line impedances of 25 Ω or greater.
- Distributed VCC and GND Pins: Minimizes noise generated by the simultaneous switching of outputs.
- Package Options: Available in Plastic Small-Outline (DW) packages and Standard Plastic 300-mil DIPs (NT).
Applications
- 3-State Memory Address Drivers: Enhances performance and density in memory address lines.
- Clock Drivers: Suitable for driving clock signals in various digital systems.
- Bus-Oriented Transceivers: Ideal for use in bus-oriented communication systems where high-impedance states are necessary.
- General Digital Systems: Can be used in any digital system requiring high-speed, low-power buffer/drivers with 3-state outputs.
Q & A
- What is the primary function of the SN64BCT25244DWRE4?
The SN64BCT25244DWRE4 is a 25-Ω octal buffer and line driver designed to improve the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented transceivers.
- What is the operating temperature range of the SN64BCT25244DWRE4?
The device operates over a temperature range from −40°C to 85°C.
- What is the significance of the high-impedance state during power up and power down?
The outputs are in a high-impedance state while the supply voltage is less than approximately 3 V, which helps in preventing unwanted current flow during power transitions.
- What type of ESD protection does the SN64BCT25244DWRE4 offer?
The device exceeds 2000 V per MIL-STD-883C, Method 3015, and 200 V using the machine model (C = 200 pF, R = 0).
- How does the distributed VCC and GND pin configuration benefit the device?
The distributed VCC and GND pins minimize noise generated by the simultaneous switching of outputs, ensuring more reliable system operation.
- What are the package options available for the SN64BCT25244DWRE4?
The device is available in Plastic Small-Outline (DW) packages and Standard Plastic 300-mil DIPs (NT).
- What is the maximum low-level output current (IOL) the device can sink?
The device can sink up to 188 mA of low-level output current.
- How does the device facilitate incident-wave switching?
The device is designed to facilitate incident-wave switching for line impedances of 25 Ω or greater.
- What is the typical propagation delay time (tPLH) from input A to output Y?
The typical propagation delay time (tPLH) from input A to output Y is 3.2 ns at VCC = 5 V and TA = 25°C.
- Can unused or floating inputs be left unconnected?
No, unused or floating inputs must be held high or low to ensure proper operation.
- Is the SN64BCT25244DWRE4 RoHS compliant?
