Overview
The 74LVX245MTR is a low-voltage octal bidirectional transceiver produced by STMicroelectronics. This integrated circuit is designed for bus-oriented applications and features high-speed CMOS technology. It is ideal for two-way asynchronous communication between data buses, making it suitable for a variety of digital systems that require efficient data transfer.
The device includes eight non-inverting bidirectional buffers and is controlled by a Transmit/Receive (T/R) input and an Output Enable (OE) input. The T/R input determines the direction of data flow, while the OE input can disable the device, placing both sides of the transceiver in a high-impedance state.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| DC Supply Voltage (VCC) | 2.0 | 3.6 | V | |
| DC Input Voltage (T/R, OE) | 0 | 5.5 | V | |
| DC Output Voltage (VI/O) | 0 | VCC + 0.5 | V | |
| Propagation Delay (tPLH, tPHL) at VCC = 3.3V, CL = 50pF | 4.7 | 7.2 | 10.1 | ns |
| Output Enable Time to High and Low Level (tPZL, tPZH) at VCC = 3.3V, CL = 50pF | 7.1 | 9.6 | 14.5 | ns |
| Output Disable Time From High and Low Level (tPLZ, tPHZ) at VCC = 3.3V, CL = 50pF | 9.6 | 12.8 | 14.5 | ns |
| Operating Temperature (TA) | -40 | 85 | °C | |
| Storage Temperature (TSTG) | -65 | 150 | °C | |
| Power Dissipation | 180 | mW |
Key Features
- High Speed: Propagation delay of 4.7 ns (typ) at VCC = 3.3 V.
- Low Power Dissipation: Maximum quiescent supply current of 4 μA at TA = 25°C.
- Power Down Protection: Provided on inputs to prevent damage during power-down states.
- Balanced Propagation Delays: Ensures consistent signal timing.
- Low Noise: Quiet output maximum dynamic VOL of 0.8 V (max).
- Pin and Function Compatible: With other standard logic families.
- Latchup Performance: Exceeds 300 mA.
- ESD Performance: Human Body Model > 2000 V, Machine Model > 200 V.
- Pb-Free and RoHS Compliant: Environmentally friendly packaging.
Applications
The 74LVX245MTR is ideal for various bus-oriented applications, including:
- Low power and low noise 3.3V digital systems.
- Two-way asynchronous communication between data buses.
- Embedded systems requiring efficient data transfer.
- Industrial control systems and automation.
- Consumer electronics and IoT devices).
Q & A
- What is the primary function of the 74LVX245MTR?
The primary function is to act as an octal bidirectional transceiver for two-way asynchronous communication between data buses.
- How is the direction of data flow controlled in the 74LVX245MTR?
The direction of data flow is controlled by the Transmit/Receive (T/R) input. A high level on T/R enables data from A ports to B ports, while a low level enables data from B ports to A ports.
- What is the purpose of the Output Enable (OE) input?
The OE input can disable the device, placing both sides of the transceiver in a high-impedance state, effectively isolating the buses.
- What are the operating voltage and temperature ranges for the 74LVX245MTR?
The operating voltage range is 2.0V to 3.6V, and the operating temperature range is -40°C to 85°C.
- Is the 74LVX245MTR Pb-Free and RoHS compliant?
Yes, the device is Pb-Free and RoHS compliant.
- What is the maximum propagation delay for the 74LVX245MTR at VCC = 3.3V and CL = 50pF?
The maximum propagation delay is 10.1 ns.
- What are the ESD protection levels for the 74LVX245MTR?
The device has ESD protection levels of > 2000 V for the Human Body Model and > 200 V for the Machine Model.
- Can the 74LVX245MTR be used to interface 5.0V to 3.0V systems directly?
No, the device cannot be used to interface 5.0V to 3.0V systems directly due to the formation of a parasitic diode between the bus and VCC terminals.
- What is the maximum power dissipation for the 74LVX245MTR?
The maximum power dissipation is 180 mW.
- What are the storage temperature limits for the 74LVX245MTR?
The storage temperature limits are -65°C to 150°C.
