Overview
The SN74LV245ADBR, 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. It operates over a wide voltage range from 2 V to 5.5 V, making it versatile for various applications.
Key Specifications
| Parameter | Unit | Min | Typ | Max |
|---|---|---|---|---|
| VCC Supply Voltage | V | 2 | 5.5 | |
| VI Input Voltage | V | 0 | 5.5 | |
| VO Output Voltage | V | 0 | VCC | |
| tpd Propagation Delay (A to B or B to A) | ns | 6.3 | 13 | |
| VOLP Output Ground Bounce | V | < 0.8 | ||
| VOHV Output VOH Undershoot | V | > 2.3 | ||
| ESD Protection | 2000-V Human-Body Model | |||
| Latch-Up Performance | mA | > 250 |
Key Features
- Operates from 2 V to 5.5 V VCC.
- Maximum propagation delay of 6.3 ns at 3.3 V.
- Typical output ground bounce (VOLP) < 0.8 V at VCC = 3.3 V, TA = 25°C.
- Typical output VOH undershoot (VOHV) > 2.3 V at VCC = 3.3 V, TA = 25°C.
- Supports mixed-mode signal operation on all ports.
- Ioff supports partial-power-down mode operation.
- Latch-up performance exceeds 250 mA per JESD 17.
- ESD protection exceeds JESD 22 – 2000-V Human-Body Model, 200-V Machine Model, and 1000-V Charged-Device Model.
Applications
- Servers
- LED displays
- Network switches
- Telecom infrastructure
- Motor drivers
- I/O expanders
- Cable modem termination systems
Q & A
- What is the operating voltage range of the SN74LV245ADBR?
The SN74LV245ADBR operates from 2 V to 5.5 V VCC.
- What is the maximum propagation delay of the SN74LV245ADBR at 3.3 V?
The maximum propagation delay is 6.3 ns at 3.3 V.
- What is the typical output ground bounce (VOLP) at VCC = 3.3 V?
The typical output ground bounce (VOLP) is less than 0.8 V at VCC = 3.3 V, TA = 25°C.
- Does the SN74LV245ADBR support mixed-mode signal operation?
- What is the latch-up performance of the SN74LV245ADBR?
The latch-up performance exceeds 250 mA per JESD 17.
- What kind of ESD protection does the SN74LV245ADBR have?
The device has ESD protection exceeding JESD 22 – 2000-V Human-Body Model, 200-V Machine Model, and 1000-V Charged-Device Model.
- What are some common applications of the SN74LV245ADBR?
Common applications include servers, LED displays, network switches, telecom infrastructure, motor drivers, and I/O expanders.
- How does the direction-control (DIR) input work?
The direction-control (DIR) input determines the direction of data transmission between the A and B buses. When high, the signal propagates from A to B; when low, it propagates from B to A.
- What is the significance of the output enable (OE) pin?
The output enable (OE) pin controls the state of the outputs. When high, the outputs are enabled; when low, the outputs are in a high-impedance state.
- Does the SN74LV245ADBR support partial-power-down mode operation?
