Overview
The SN74LVCC3245A, produced by Texas Instruments, is an 8-bit (octal) noninverting bus transceiver designed for bidirectional voltage translation. This device features two separate supply rails, allowing it to operate in a wide range of voltage environments. The A port operates at 2.3 V to 3.6 V, while the B port operates at 3 V to 5.5 V, making it ideal for translating signals between different voltage systems, such as from 3.3 V to 5 V or from 2.5 V to 3.3 V.
Key Specifications
| Parameter | Test Conditions | Min | Max | Unit | |
|---|---|---|---|---|---|
| VCCA (A Port Voltage) | 2.3 | 3.6 | V | ||
| VCCB (B Port Voltage) | 3 | 5.5 | V | ||
| Operating Free-Air Temperature (TA) | -40 | 85 | °C | ||
| Input Transition Rise or Fall Rate | 10 | ns/V | |||
| Propagation Delay Time (tpd) | VCCA = 2.7 V to 3.6 V, VCCB = 3.3 V ± 0.3 V | 7.6 | ns | ||
| Output Enable Time (tPZL/tPHZ) | VCCA = 2.7 V to 3.6 V, VCCB = 3.3 V ± 0.3 V | 9.7 | ns | ||
| ESD Protection | Human Body Model (A114-A) | 2000 | V | ||
| ESD Protection | Charged-Device Model (C101) | 1000 | V |
Key Features
- Bidirectional voltage translator
- Operates with A port at 2.3 V to 3.6 V and B port at 3 V to 5.5 V
- Control inputs VIH and VIL levels are referenced to VCCA voltage
- Latch-up performance exceeds 250 mA per JESD 17
- ESD protection exceeds JESD 22 standards (2000-V Human Body Model and 1000-V Charged-Device Model)
- Available in various packages including DB (SSOP), DW (SOIC), DBQ (SSOP), NS (SO), and PW (TSSOP)
Applications
- Level translation between different voltage systems
- USB and other interface applications
- Interfacing between analog and digital systems
- General-purpose bus transceiver applications
Q & A
- What is the primary function of the SN74LVCC3245A?
The primary function of the SN74LVCC3245A is to act as a bidirectional voltage translator, enabling communication between devices operating at different voltage levels.
- What are the operating voltage ranges for the A and B ports?
The A port operates at 2.3 V to 3.6 V, and the B port operates at 3 V to 5.5 V.
- What types of ESD protection does the SN74LVCC3245A offer?
The device offers ESD protection exceeding JESD 22 standards, including 2000-V Human Body Model and 1000-V Charged-Device Model.
- What are the typical propagation delay times for the SN74LVCC3245A?
The typical propagation delay time (tpd) is around 7.6 ns for VCCA = 2.7 V to 3.6 V and VCCB = 3.3 V ± 0.3 V.
- What are the available package options for the SN74LVCC3245A?
The device is available in DB (SSOP), DW (SOIC), DBQ (SSOP), NS (SO), and PW (TSSOP) packages.
- What is the operating temperature range for the SN74LVCC3245A?
The operating free-air temperature range is from -40°C to 85°C.
- How does the SN74LVCC3245A handle latch-up performance?
The device's latch-up performance exceeds 250 mA per JESD 17 standards.
- What are some common applications for the SN74LVCC3245A?
Common applications include level translation, USB, interfacing between analog and digital systems, and general-purpose bus transceiver applications.
- What is the significance of the control inputs VIH and VIL levels being referenced to VCCA voltage?
This ensures that the control inputs are compatible with the voltage level of the A port, enhancing the device's flexibility in different voltage environments.
- How does the SN74LVCC3245A manage output enable and disable times?
The output enable and disable times (tPZL/tPHZ) are typically around 9.7 ns for VCCA = 2.7 V to 3.6 V and VCCB = 3.3 V ± 0.3 V.
