Overview
The SN74LVC245A, produced by Texas Instruments, is an octal bus transceiver designed for asynchronous communication between data buses. This device operates within a voltage range of 1.65 V to 3.6 V, making it versatile for various applications. It features 3-state outputs and supports mixed-mode signal operation, allowing it to handle inputs up to 5.5 V even when the VCC is at 3.3 V. The SN74LVC245A is available in several package types, including DB, DGV, DW, N, NS, PW, and RGY, catering to different design requirements.
Key Specifications
| Parameter | Min | Max | Unit | Conditions |
|---|---|---|---|---|
| VCC Supply Voltage Range | -0.5 | 6.5 | V | |
| VI Input Voltage Range | -0.5 | 6.5 | V | |
| Propagation Delay Time (tpd) at 3.3 V | 6.3 | ns | ||
| Operating Temperature Range | -40 | 125 | °C | |
| ESD Protection (Human-Body Model) | 2000 | V | ||
| ESD Protection (Charged-Device Model) | 1000 | V |
Key Features
- Operates from 1.65 V to 3.6 V VCC.
- Inputs accept voltages up to 5.5 V.
- 3-state outputs.
- Maximum propagation delay time of 6.3 ns at 3.3 V.
- Supports mixed-mode signal operation on all ports.
- Ioff supports live insertion, partial-power-down mode, and back-drive protection.
- ESD protection exceeds JESD 22 (2000-V Human-Body Model, 1000-V Charged-Device Model).
- Latch-up performance exceeds 250 mA per JESD 17.
Applications
- Cable Modem Termination Systems.
- Servers.
- LED Displays.
- Network Switches.
- Telecom Infrastructure.
- Motor Drivers.
- I/O Expanders.
Q & A
- What is the operating voltage range of the SN74LVC245A?
The SN74LVC245A operates from 1.65 V to 3.6 V.
- What is the maximum input voltage the device can accept?
The device can accept input voltages up to 5.5 V.
- What is the maximum propagation delay time at 3.3 V?
The maximum propagation delay time at 3.3 V is 6.3 ns.
- What types of ESD protection does the SN74LVC245A offer?
The device offers ESD protection exceeding 2000 V for the Human-Body Model and 1000 V for the Charged-Device Model.
- What are some common applications of the SN74LVC245A?
Common applications include cable modem termination systems, servers, LED displays, network switches, telecom infrastructure, motor drivers, and I/O expanders.
- How does the direction-control (DIR) input work?
The DIR input controls the direction of data transmission. When high, data propagates from the A bus to the B bus; when low, data propagates from the B bus to the A bus.
- What is the purpose of the output-enable (OE) input?
The OE input can be used to disable the device, effectively isolating the buses.
- Does the SN74LVC245A support mixed-mode signal operation?
Yes, the device supports mixed-mode signal operation on all ports.
- What are the available package types for the SN74LVC245A?
The device is available in DB, DGV, DW, N, NS, PW, and RGY packages.
- What is the operating temperature range of the SN74LVC245A?
The operating temperature range is from -40°C to 125°C.
