사양
| 속성 | 가치 |
| Supplier | Texas Instruments |
| Package / Case | Tape & Reel (TR),Cut Tape (CT) |
| Series | 74AXC |
| Part Status | Active |
| Translator Type | Voltage Level |
| Channel Type | Bidirectional |
| Number of Circuits | 1 |
| Channelsper Circuit | 1 |
| Voltage - VCCA | 0.65 V ~ 3.6 V |
| Voltage - VCCB | 0.65 V ~ 3.6 V |
| Output Type | Tri-State, Non-Inverted |
| Data Rate | 500Mbps |
| Operating Temperature | -40°C ~ 125°C (TA) |
| Mounting Type | Surface Mount |
개요
Description
SN74AXC1T45DBVR is TI’s 1-bit bidirectional voltage level translator (AXC family) with auto-direction sensing. It translates a single I/O line between two supply domains, VCCA and VCCB, without any direction control pin. The device operates from a dual-supply range typically 1.65–3.6 V on both sides, enabling easy interfacing between low-voltage devices (e.g., 1.8 V MCU) and higher-voltage peripherals (e.g., 3.3 V). It features Ioff, so off-side pins don’t back-power when one side is powered down (partial-power-down compatibility). The DBVR suffix indicates the specific 8-pin package and reel variant. Applications include single-ended, bidirectional level shifting for GPIOs between mixed-voltage microcontrollers, sensors, and other digital peripherals. For exact electrical specs (Vih/Vil, propagation delay, leakage, power), consult the SN74AXC1T45 datasheet.
Equivalent
Primary direct equivalent: Nexperia 74AXC1T45. This is the same 1-bit bidirectional level translator (same silicon). TI’s SN74AXC1T45DBVR is essentially this device under TI branding. Few other vendors provide an exact cross-reference. If substituting, you’d need to match VCCA/VCCB ranges and OE behavior with another 1-bit translator, but it won’t be an exact cross.
Features
Here are concise features of SN74AXC1T45DBVR:
- 1-bit bidirectional voltage-level translator
- Auto-direction sensing (no external DIR pin required)
- Two-supply operation: VCCA and VCCB for level shifting between rails
- Ioff supports partial power-down (no back-powering when powered down)
- ESD protection on I/O pins; robust input/output protection
- Low static and dynamic current; suitable for low-power designs
- Fast switching performance suitable for common digital logic
- 8-pin package in DBV/R (RoHS-compliant) format
- Temperature range typically -40°C to 85°C (industrial)
Note: For exact voltage ranges, propagation delays, and electrical specifications, see the TI datasheet.
- 1-bit bidirectional voltage-level translator
- Auto-direction sensing (no external DIR pin required)
- Two-supply operation: VCCA and VCCB for level shifting between rails
- Ioff supports partial power-down (no back-powering when powered down)
- ESD protection on I/O pins; robust input/output protection
- Low static and dynamic current; suitable for low-power designs
- Fast switching performance suitable for common digital logic
- 8-pin package in DBV/R (RoHS-compliant) format
- Temperature range typically -40°C to 85°C (industrial)
Note: For exact voltage ranges, propagation delays, and electrical specifications, see the TI datasheet.
Pinout
Pin count: 8 pins (DBVR package).
Function: 1-bit bidirectional voltage-level translator with auto-direction sensing, translating between two supply domains (A side: VCCA, B side: VCCB) for a single data line (I/O on A and B ports).
Function: 1-bit bidirectional voltage-level translator with auto-direction sensing, translating between two supply domains (A side: VCCA, B side: VCCB) for a single data line (I/O on A and B ports).
Manufacturer
- Manufacturer: Texas Instruments Incorporated (TI).
- What kind of company: An American multinational semiconductor company that designs and manufactures analog, mixed-signal, and embedded processing integrated circuits. It’s one of the world’s largest producers of semiconductors.
- What kind of company: An American multinational semiconductor company that designs and manufactures analog, mixed-signal, and embedded processing integrated circuits. It’s one of the world’s largest producers of semiconductors.
Application
SN74AXC1T45DBVR is a 1-bit bidirectional level shifter with auto-direction sensing. Common applications:
- Level shifting between different supply voltages (e.g., 1.65–3.3V or 5V to 3.3V) in mixed-signal designs
- Interfaces between MCUs/FPGA/DSP/ASIC and peripherals with different IO voltages
- Bidirectional I/O bridging for buses such as SPI, I2C, and UART across voltage domains
- Signal translation in portable/embedded, consumer electronics, automotive, and industrial applications requiring small footprint and low power
- Level shifting between different supply voltages (e.g., 1.65–3.3V or 5V to 3.3V) in mixed-signal designs
- Interfaces between MCUs/FPGA/DSP/ASIC and peripherals with different IO voltages
- Bidirectional I/O bridging for buses such as SPI, I2C, and UART across voltage domains
- Signal translation in portable/embedded, consumer electronics, automotive, and industrial applications requiring small footprint and low power
Package
8-pin VSSOP (Very Small Outline Package). The “DBV” code denotes VSSOP-8, and the trailing “R” means Tape-and-Reel packaging.
