Overview
The CD74ACT245SM96, produced by Texas Instruments, is an octal-bus transceiver that utilizes Advanced CMOS Logic technology. This non-inverting three-state bidirectional transceiver-buffer is designed for two-way transmission between the "A" bus and the "B" bus or vice versa. The direction of data transmission is controlled by the logic level present on the direction input (DIR), and the output enable input (OE) determines whether the outputs are in a high-impedance state or active.
This device is part of the 'ACT245 series, which features buffered inputs, SCR-latchup-resistant CMOS process, and balanced propagation delays. It is known for its high speed and significantly reduced power consumption compared to bipolar FAST™/AS/S devices.
Key Specifications
| Parameter | Unit | Min | Typ | Max |
|---|---|---|---|---|
| VCC Supply Voltage | V | 4.5 | 5.5 | |
| VI Input Voltage | V | 0 | VCC | |
| VO Output Voltage | V | 0 | VCC | |
| TA Operating Temperature Range | °C | -55 | 125 | |
| Propagation Delay (tPLH, tPHL) | ns | 2.5 | 4 | 9.1 |
| Output Drive Current | mA | -24 | 24 | |
| Input Leakage Current | µA | ±1 | ||
| Quiescent Supply Current (ICC) | µA | 160 |
Key Features
- Buffered inputs
- Typical propagation delay of 4ns at VCC = 5V, TA = 25°C, CL = 50pF
- SCR-latchup-resistant CMOS process and circuit design
- Speed of bipolar FAST™/AS/S with significantly reduced power consumption
- Balanced propagation delays
- AC types feature 1.5V to 5.5V operation and balanced noise immunity at 30% of the supply
- ±24mA output drive current, capable of driving 50Ω transmission lines and fanout to 15 FAST™ ICs
- Three-state outputs
Applications
The CD74ACT245SM96 is suitable for a variety of applications requiring high-speed data transmission and low power consumption. These include:
- High-speed data buses in computer systems
- Communication networks and interfaces
- Embedded systems requiring low power and high speed
- Industrial control systems
- Automotive electronics
Q & A
- What is the primary function of the CD74ACT245SM96?
The CD74ACT245SM96 is a non-inverting three-state bidirectional transceiver-buffer designed for two-way transmission between the "A" bus and the "B" bus or vice versa.
- What is the typical propagation delay of the CD74ACT245SM96?
The typical propagation delay is 4ns at VCC = 5V, TA = 25°C, CL = 50pF.
- What is the operating voltage range for the CD74ACT245SM96?
The operating voltage range is from 4.5V to 5.5V.
- How much output drive current does the CD74ACT245SM96 provide?
The device provides ±24mA output drive current.
- What is the maximum operating temperature range for the CD74ACT245SM96?
The maximum operating temperature range is from -55°C to 125°C.
- Is the CD74ACT245SM96 resistant to SCR-latchup?
- What are the key applications of the CD74ACT245SM96?
The device is suitable for high-speed data buses, communication networks, embedded systems, industrial control systems, and automotive electronics.
- How does the direction input (DIR) control the data direction?
The logic level present on the direction input (DIR) determines whether data is transmitted from the "A" bus to the "B" bus or from the "B" bus to the "A" bus.
- What happens when the output enable input (OE) is HIGH?
When the output enable input (OE) is HIGH, the outputs are in the high-impedance state.
- What is the significance of the three-state outputs in the CD74ACT245SM96?
The three-state outputs allow the device to be in a high-impedance state, which is useful for bus applications where multiple devices need to share the same bus lines.
