Overview
The SN74LVC1T45DCKTG4, produced by Texas Instruments, is a single-bit noninverting bus transceiver designed for universal low-voltage bidirectional translation between different voltage nodes. This device uses two separate configurable power-supply rails, allowing each port to operate over a wide voltage range from 1.65V to 5.5V. It is particularly useful for asynchronous communication between two data buses, enabling data transmission between the A and B ports based on the logic levels of the direction-control (DIR) input.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Voltage - VCCA | 1.65V to 5.5V | V |
| Voltage - VCCB | 1.65V to 5.5V | V |
| Operating Temperature | -40°C to 85°C | °C |
| Maximum Data Rates | 420Mbps (3.3V to 5V), 210Mbps (to 3.3V), 140Mbps (to 2.5V), 75Mbps (to 1.8V) | Mbps |
| Output Drive | ±24mA at 3.3V | mA |
| Power Consumption | 4µA maximum ICC | µA |
| Package | 6-TSSOP, SC-88, SOT-363 | - |
| ESD Protection | 2000V Human-Body Model, 200V Machine Model, 1000V Charged-Device Model | V |
Key Features
- ESD protection exceeds JESD 22: 2000V Human-Body Model, 200V Machine Model, 1000V Charged-Device Model
- Available in the Texas Instruments NanoFree™ package
- Fully configurable dual-rail design allows each port to operate over the full 1.65V to 5.5V 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, 4µA maximum ICC
- ±24mA output drive at 3.3V
- Ioff supports partial-power-down mode operation
- Latch-up performance exceeds 100mA per JESD 78, Class II
Applications
The SN74LVC1T45DCKTG4 is ideal for various applications requiring bidirectional voltage translation between different voltage levels. This includes:
- Asynchronous communication between two data buses in mixed-voltage systems.
- Universal low-voltage translation between 1.8V, 2.5V, 3.3V, and 5V voltage nodes.
- Partial-power-down mode applications where Ioff is necessary to prevent current backflow.
- Systems requiring high ESD protection and low power consumption.
Q & A
- What is the voltage range for VCCA and VCCB in the SN74LVC1T45DCKTG4?
VCCA and VCCB can operate over a voltage range from 1.65V to 5.5V
- What is the maximum data rate for the SN74LVC1T45DCKTG4?
The maximum data rates are 420Mbps (3.3V to 5V), 210Mbps (to 3.3V), 140Mbps (to 2.5V), and 75Mbps (to 1.8V)
- What type of ESD protection does the SN74LVC1T45DCKTG4 offer?
The device offers ESD protection exceeding JESD 22: 2000V Human-Body Model, 200V Machine Model, and 1000V Charged-Device Model
- How does the DIR input circuit work in the SN74LVC1T45DCKTG4?
The DIR input circuit is referenced to VCCA and controls the direction of data transmission between the A and B ports
- What is the power consumption of the SN74LVC1T45DCKTG4?
The maximum power consumption is 4µA ICC
- What is the output drive capability of the SN74LVC1T45DCKTG4?
The device can drive ±24mA at 3.3V
- Does the SN74LVC1T45DCKTG4 support partial-power-down mode?
Yes, it supports partial-power-down mode operation using Ioff
- What is the operating temperature range for the SN74LVC1T45DCKTG4?
The operating temperature range is -40°C to 85°C
- What package types are available for the SN74LVC1T45DCKTG4?
The device is available in 6-TSSOP, SC-88, and SOT-363 packages
- Is the SN74LVC1T45DCKTG4 RoHS compliant?
Yes, the device is RoHS compliant
