Overview
The SN74LVC245APW is an octal bus transceiver produced by Texas Instruments. This device is designed for asynchronous communication between data buses, operating within a voltage range of 1.65 V to 3.6 V. It is particularly useful for applications requiring bidirectional data transfer between two buses, with the direction of data flow controlled by the DIR input. The output-enable (OE) input allows the device to be disabled, effectively isolating the buses. This component is part of the 74LVC family, known for its low-voltage CMOS logic and high-speed operation.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | 20-TSSOP (0.173", 4.40mm Width) | |
| Operating Temperature Range | -40 to 125 | °C |
| Supply Voltage Range | 1.65 to 3.6 | V |
| Input Voltage Range | -0.5 to 6.5 | V |
| Output Type | Push-Pull | |
| Current - Output High, Low | 24mA, 24mA | |
| Propagation Delay Time (tpd) at 3.3 V | 6.3 ns | ns |
| Typical VOLP (Output Ground Bounce) at VCC = 3.3 V, TA = 25°C | < 0.8 V | V |
| Typical VOHV (Output VOH Undershoot) at VCC = 3.3 V, TA = 25°C | > 2 V | V |
| ESD Protection | 2000-V Human-Body Model, 1000-V Charged-Device Model |
Key Features
- Operates from 1.65 V to 3.6 V supply voltage range.
- Inputs accept voltages up to 5.5 V.
- Maximum propagation delay time (tpd) of 6.3 ns at 3.3 V.
- Typical output ground bounce (VOLP) less than 0.8 V and output VOH undershoot greater than 2 V at VCC = 3.3 V, TA = 25°C.
- Supports live insertion, partial-power-down mode, and back drive protection (Ioff).
- Supports mixed-mode signal operation on all ports (5-V input/output voltage with 3.3-V VCC).
- Latch-up performance exceeds 250 mA per JESD 17.
- ESD protection exceeds JESD 22 – 2000-V Human-Body Model and 1000-V Charged-Device Model.
Applications
- Asynchronous communication between data buses in various digital systems.
- Cable modem termination systems.
- Servers and data centers requiring high-speed data transfer.
- LED displays and other display systems.
- General-purpose logic circuits where bidirectional data transfer is necessary.
Q & A
- What is the operating voltage range of the SN74LVC245APW?
The SN74LVC245APW operates from 1.65 V to 3.6 V.
- What is the maximum propagation delay time (tpd) 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 supply voltage?
- What is the typical output ground bounce (VOLP) at VCC = 3.3 V, TA = 25°C?
The typical output ground bounce (VOLP) is less than 0.8 V at VCC = 3.3 V, TA = 25°C.
- Does the SN74LVC245APW support mixed-mode signal operation?
- What is the ESD protection level of the SN74LVC245APW?
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 SN74LVC245APW?
The latch-up performance exceeds 250 mA per JESD 17.
- What is the package type of the SN74LVC245APW?
The package type is 20-TSSOP (0.173", 4.40mm Width).
- What is the operating temperature range of the SN74LVC245APW?
The operating temperature range is -40°C to 125°C.
- Can the SN74LVC245APW be used in partial-power-down mode?
