Overview
The SN74LVC1T45MDCKREP, produced by Texas Instruments, is a single-bit noninverting bus transceiver designed for asynchronous communication between two data buses. This device features a fully configurable dual-rail design, allowing each port to operate over a wide power-supply range from 1.65 V to 5.5 V. The A port is powered by VCCA, and the B port is powered by 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 controlled by a direction-control (DIR) input, which determines the direction of data transmission between the A and B buses. It also includes features like VCC isolation, low power consumption, and high-speed data translation capabilities.
Key Specifications
| Parameter | Description |
|---|---|
| Package | SOT-SC70 (DCK), 6 pins |
| Operating Temperature Range | -55°C to 125°C |
| Power-Supply Range | 1.65 V to 5.5 V for both VCCA and VCCB |
| Data Rates | Up to 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) |
| Output Drive | ±24 mA at 3.3 V |
| Low Power Consumption | Max 4 µA ICC |
| ESD Protection | Exceeds JESD 22: 2000-V Human-Body Model, 200-V Machine Model, 1000-V Charged-Device Model |
| Latch-Up Performance | Exceeds 100 mA per JESD 78, Class II |
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.
- High-speed data translation capabilities up to 420 Mbps.
- Ioff supports partial-power-down mode operation, preventing damaging current backflow.
- Glitch-free power supply sequencing.
- Balanced high-drive CMOS push-pull outputs.
- ESD protection exceeding JESD 22 standards.
- Latch-up performance exceeding 100 mA per JESD 78, Class II.
Applications
The SN74LVC1T45MDCKREP is suitable for a variety of applications requiring voltage translation and high-speed data communication. These include:
- Defense and aerospace systems due to its extended temperature range and robust specifications.
- Medical devices where reliability and precision are critical.
- Industrial automation systems requiring reliable and fast data transmission.
- Consumer electronics needing flexible voltage translation capabilities.
Q & A
- What is the primary function of the SN74LVC1T45MDCKREP?
The primary function is to act as a single-bit noninverting bus transceiver for asynchronous communication between two data buses with configurable voltage translation.
- What is the power-supply range for the SN74LVC1T45MDCKREP?
The device operates over a power-supply range from 1.65 V to 5.5 V for both VCCA and VCCB.
- What are the data rates supported by the SN74LVC1T45MDCKREP?
The device supports data rates up to 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 VCC isolation feature?
If either VCC input is at GND, both ports of the device are in the high-impedance state.
- How does the DIR input control data transmission?
The DIR input determines the direction of data transmission between the A and B buses; a high level on DIR allows data transmission from A to B, and a low level allows data transmission from B to A.
- What is the maximum output drive current?
The device can drive up to ±24 mA at 3.3 V.
- Does the SN74LVC1T45MDCKREP support partial-power-down mode?
Yes, the device supports partial-power-down mode using Ioff, which prevents damaging current backflow when the device is powered down.
- What kind of ESD protection does the SN74LVC1T45MDCKREP have?
The device exceeds JESD 22 standards with 2000-V Human-Body Model, 200-V Machine Model, and 1000-V Charged-Device Model ESD protection.
- What are the operating temperature ranges for the SN74LVC1T45MDCKREP?
The device operates in the temperature range of -55°C to 125°C.
- Is the SN74LVC1T45MDCKREP suitable for defense, aerospace, and medical applications?
Yes, it is suitable due to its extended temperature range, robust specifications, and extended product life cycle.
