Overview
The SN74LVCH245ADWRG4 is an octal bus transceiver with tri-state outputs, designed and manufactured by Texas Instruments. This device is part of the SN74LVCH245A family and is packaged in a 20-pin SOIC (DW) package. It is engineered for asynchronous communication between data buses, facilitating voltage translation between 3.3-V and 5-V environments. The device features two separate supply rails, VCCA for the A port and VCCB for the B port, allowing for flexible voltage operation. The SN74LVCH245ADWRG4 is suitable for a wide range of applications requiring high-speed data transfer and voltage level shifting.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOIC (DW) | - |
| Pins | 20 | - |
| Operating Temperature Range | -40 to 125 | °C |
| VCC Range | 1.65 to 3.6 | V |
| Input Voltage Range | 0 to 5.5 | V |
| Propagation Delay Time (tpd) | 6.3 | ns (at 3.3 V) |
| Output Ground Bounce (VOLP) | < 0.8 | V (at VCC = 3.3 V, TA = 25°C) |
| Output VOH Undershoot (VOHV) | > 2 | V (at VCC = 3.3 V, TA = 25°C) |
| High-Level Output Current (IOH) | -24 | mA (at VCC = 3 V) |
| Low-Level Output Current (IOL) | 24 | mA (at VCC = 3 V) |
| ESD Protection | 2000-V Human-Body Model, 1000-V Charged-Device Model | - |
Key Features
- Bidirectional Voltage Translator: Allows translation between 3.3-V and 5-V environments.
- Tri-State Outputs: Outputs can be set to high, low, or tri-state, enabling bus isolation.
- High-Speed Operation: Maximum propagation delay time of 6.3 ns at 3.3 V.
- Input Voltage Tolerance: Inputs accept voltages up to 5.5 V.
- ESD Protection: Exceeds JESD 22 standards with 2000-V Human-Body Model and 1000-V Charged-Device Model.
- Latch-Up Performance: Exceeds 250 mA per JESD 17.
- Mixed-Mode Signal Operation: Supports mixed 3.3-V and 5-V signal operation on all ports.
Applications
- Cable Modem Termination Systems: Used in high-speed data communication systems.
- Servers and Data Centers: Facilitates voltage translation in mixed-voltage systems.
- LED Displays and Consumer Electronics: Suitable for applications requiring high-speed data transfer and voltage level shifting.
- Industrial and Automotive Systems: Used in environments requiring robust ESD protection and high reliability.
Q & A
- What is the primary function of the SN74LVCH245ADWRG4?
The primary function is to act as an octal bus transceiver with tri-state outputs, facilitating asynchronous communication and voltage translation between 3.3-V and 5-V environments.
- What are the operating temperature ranges for this device?
The operating temperature range is from -40°C to 125°C.
- What is the maximum propagation delay time at 3.3 V?
The maximum propagation delay time at 3.3 V is 6.3 ns.
- Does the device support mixed-mode signal operation?
Yes, it supports mixed 3.3-V and 5-V signal operation on all ports.
- What is the ESD protection level of the SN74LVCH245ADWRG4?
The device exceeds JESD 22 standards with 2000-V Human-Body Model and 1000-V Charged-Device Model ESD protection.
- Can the device operate with input voltages higher than its VCC?
Yes, the inputs can accept voltages up to 5.5 V.
- What is the purpose of the tri-state outputs?
The tri-state outputs allow the device to isolate the buses when the output-enable (OE) input is set to disable the device.
- What are some common applications for this device?
Common applications include cable modem termination systems, servers, LED displays, and industrial and automotive systems.
- How does the device handle latch-up performance?
The device's latch-up performance exceeds 250 mA per JESD 17.
- What package types are available for the SN74LVCH245A family?
The device is available in various packages including SOIC (DW), SSOP, TVSOP, TSSOP, and VQFN among others.
