Overview
The SN74LVC245APWRG4, produced by Texas Instruments, is an octal bus transceiver with 3-state outputs. This device is designed for asynchronous communication between data buses, allowing data transmission from the A bus to the B bus or vice versa, based on the logic level at the direction-control (DIR) input. The output-enable (OE) input can be used to disable the device, effectively isolating the buses. This component is versatile, operating over a wide voltage range and supporting mixed-mode signal operation, making it suitable for various applications in digital systems.
Key Specifications
| Parameter | Min | Max | Unit | Conditions |
|---|---|---|---|---|
| VCC Supply Voltage Range | 1.65 | 3.6 | V | Operating |
| Input Voltage Range | -0.5 | 6.5 | V | |
| Output Voltage Range (High-Impedance or Power-Off State) | -0.5 | 6.5 | V | |
| Propagation Delay Time (tpd) at 3.3 V | 6.3 | ns | CL = 50 pF | |
| Operating Temperature Range | -40 | 85 | °C | |
| Junction-to-Ambient Thermal Resistance (RθJA) | 106.5 | °C/W | ||
| Junction-to-Case (Top) Thermal Resistance (RθJC) | 68.1 | °C/W |
Key Features
- Operates from 1.65 V to 3.6 V, making it suitable for a wide range of voltage environments.
- Inputs accept voltages up to 5.5 V, allowing compatibility with higher voltage systems.
- Maximum propagation delay time (tpd) of 6.3 ns at 3.3 V, ensuring high-speed data transmission.
- Typical output ground bounce (VOLP) of less than 0.8 V at VCC = 3.3 V and TA = 25°C.
- Supports partial-power-down mode operation with Ioff feature.
- Mixed-mode signal operation on all ports, allowing 5-V input/output voltage with 3.3-V VCC.
- ESD protection exceeds JESD 22 – 2000-V Human-Body Model and 1000-V Charged-Device Model.
- Latch-up performance exceeds 250 mA per JESD 17.
Applications
- Asynchronous communication between data buses in various digital systems.
- Translation between 3.3-V and 5-V systems, making it useful in mixed-voltage environments.
- Cable modem termination systems.
- Servers and data centers requiring high-speed data transmission.
- LED displays and other digital display systems.
Q & A
- What is the operating voltage range of the SN74LVC245APWRG4?
The SN74LVC245APWRG4 operates from 1.65 V to 3.6 V.
- What is the maximum propagation delay time at 3.3 V?
The maximum propagation delay time (tpd) at 3.3 V is 6.3 ns.
- Can the inputs accept voltages higher than the VCC?
- What is the typical output ground bounce (VOLP) at 3.3 V and 25°C?
The typical output ground bounce (VOLP) is less than 0.8 V at VCC = 3.3 V and TA = 25°C.
- Does the device support partial-power-down mode operation?
- What is the ESD protection level of the SN74LVC245APWRG4?
The ESD protection exceeds JESD 22 – 2000-V Human-Body Model and 1000-V Charged-Device Model.
- What is the latch-up performance of the device?
The latch-up performance exceeds 250 mA per JESD 17.
- What are some common applications of the SN74LVC245APWRG4?
- How should unused inputs be handled to ensure proper device operation?
Unused inputs must be held at VCC or GND to ensure proper device operation.
- What is the operating temperature range of the SN74LVC245APWRG4?
The operating temperature range is from -40°C to 85°C.
