Overview
The SN74LVC2T45DCUTG4, produced by Texas Instruments, is a 2-bit dual-supply transceiver designed for asynchronous communication between two data buses. This device features fully configurable dual-rail design, allowing each port to operate over a wide power-supply range of 1.65 V to 5.5 V. The A port tracks VCCA, while the B port tracks VCCB, enabling universal low-voltage bidirectional translation between various voltage nodes such as 1.8 V, 2.5 V, 3.3 V, and 5 V. The device is particularly useful for voltage-level shifting and supports 3-state outputs, making it versatile for various electronic systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Power Supply Range | 1.65 V to 5.5 V | V |
| Maximum ICC (Low Power Consumption) | 4 µA | µA |
| Output Drive at 3.3 V | ±24 mA | mA |
| Maximum Data Rates | 420 Mbps (3.3-V to 5-V translation) 210 Mbps (translate to 3.3 V) 140 Mbps (translate to 2.5 V) 75 Mbps (translate to 1.8 V) | Mbps |
| Latch-Up Performance | Exceeds 100 mA per JESD 78, Class II | mA |
| ESD Protection | 4000-V Human-Body Model (A114-A) 200-V Machine Model (A115-A) 1000-V Charged-Device Model (C101) | V |
| Package Type | VSSOP (DCU) with 8 pins |
Key Features
- Fully configurable dual-rail design allowing each port to operate over the full 1.65-V to 5.5-V power-supply range.
- VCC isolation feature – if either VCC input is at GND, both ports are in the high-impedance state.
- DIR input circuit referenced to VCCA.
- Low power consumption with a maximum ICC of 4 µA.
- Available in the Texas Instruments NanoFree™ package.
- ±24-mA output drive at 3.3 V.
- Ioff supports Partial-Power-Down mode operation.
- High data rates for various voltage translations.
- Robust ESD protection exceeding JESD 22 standards.
Applications
The SN74LVC2T45DCUTG4 is suitable for a wide range of applications requiring asynchronous communication and voltage-level shifting between different voltage domains. These include:
- Embedded systems needing bidirectional data translation between different voltage levels.
- Industrial control systems where data needs to be transmitted across different voltage nodes.
- Consumer electronics requiring low-power, high-speed data transmission.
- Automotive systems where robust ESD protection and reliable data transmission are critical.
Q & A
- What is the power supply range for the SN74LVC2T45DCUTG4?
The power supply range for the SN74LVC2T45DCUTG4 is from 1.65 V to 5.5 V for both VCCA and VCCB.
- What is the maximum ICC for this device?
The maximum ICC (low power consumption) is 4 µA.
- What are the output drive capabilities at 3.3 V?
The output drive at 3.3 V is ±24 mA.
- What are the maximum data rates for different voltage translations?
The maximum data rates are 420 Mbps (3.3-V to 5-V translation), 210 Mbps (translate to 3.3 V), 140 Mbps (translate to 2.5 V), and 75 Mbps (translate to 1.8 V).
- What is the latch-up performance of the SN74LVC2T45DCUTG4?
The latch-up performance exceeds 100 mA per JESD 78, Class II.
- What kind of ESD protection does the device offer?
The device offers ESD protection exceeding JESD 22 standards, including 4000-V Human-Body Model, 200-V Machine Model, and 1000-V Charged-Device Model.
- In what package is the SN74LVC2T45DCUTG4 available?
The device is available in the VSSOP (DCU) package with 8 pins.
- What is the purpose of the DIR input circuit?
The DIR input circuit, referenced to VCCA, activates either the B-port outputs or the A-port outputs for data transmission.
- Does the device support partial-power-down mode operation?
Yes, the device supports partial-power-down mode operation through its Ioff circuitry.
- What are some typical applications for the SN74LVC2T45DCUTG4?
Typical applications include embedded systems, industrial control systems, consumer electronics, and automotive systems requiring low-power, high-speed data transmission and robust ESD protection.
