ADG3301BKSZ-REEL Analog Devices Integrated Circuit (SOT23 (6-Pin)) In Stock
ADG3301BKSZ-REEL is a single-bit bidirectional logic-level translator from Analog Devices enabling voltage translation between 1.2 V, 1.8 V, 2.5 V, 3.3 V, and 5 V logic domains. Supports data rates up to 100 Mbps with automatic direction sensing requiring no direction control pin. Packaged in a 6-pin SOT-23 package for minimal board footprint in mixed-voltage embedded systems.
- Manufacturer
- Analog Devices
- Package
- SOT23 (6-Pin)
- Pin Count
- 6
- Lifecycle
- OBSOLETE
- Datasheet
- ADG3301BKSZ-REEL Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Automatic bidirectional direction sensing with no control pin required, simplifying schematic and PCB routing for 1-wire or I2C signal lines
- Supports logic level translation across 1.2 V, 1.8 V, 2.5 V, 3.3 V, and 5 V domains at up to 100 Mbps data rate
- 6-pin SOT-23 package occupies less than 10 mm² of PCB area, ideal for space-constrained mixed-voltage SoC peripheral interfaces
Applications
The ADG3301BKSZ-REEL is used in embedded systems requiring voltage translation between a 1.8 V or 3.3 V microcontroller and 5 V legacy peripherals, sensors, or communication interfaces such as I2C, SPI, and UART operating at different logic levels. Its automatic direction sensing makes it particularly convenient in bidirectional single-wire bus topologies and open-drain I2C buses where a traditional direction-controlled buffer would require an additional GPIO control line.
Specifications
| Pbfree Code | Yes |
| YTEOL | 0 |
| Package | SOT23 (6-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does ADG3301BKSZ-REEL automatically determine data direction without a dedicated direction control pin?
The ADG3301BKSZ-REEL uses a current-sensing technique that monitors which side is driving the bus. When the A-side voltage is pulled low by a transmitting device, the circuit detects the current direction and enables the appropriate pull-down on the B-side within a few nanoseconds. This auto-direction mechanism requires no software GPIO toggling, reducing firmware complexity and eliminating the setup and hold time overhead of manual direction control in half-duplex bus designs at data rates up to 100 Mbps.
Which voltage domains does ADG3301BKSZ-REEL support, and can it translate between a 1.8 V MCU and a 5 V sensor?
ADG3301BKSZ-REEL translates logic levels across 1.2 V, 1.8 V, 2.5 V, 3.3 V, and 5 V supply rails, so translating between a 1.8 V MCU I/O and a 5 V legacy sensor is a direct supported use case. The VCCA pin is connected to the lower rail (1.8 V) and VCCB to the higher rail (5 V), and the device handles the voltage swing difference without external pull-up resistors or series protection resistors, as long as the data rate stays within the 100 Mbps rated maximum.
What communication protocols and data rates is ADG3301BKSZ-REEL compatible with in typical embedded designs?
ADG3301BKSZ-REEL supports I2C at 100 kHz (standard mode), 400 kHz (fast mode), and 1 MHz (fast-mode plus), as well as SPI at several MHz and UART at standard baud rates up to 100 Mbps. Its open-drain compatible output structure works with I2C wired-OR bus configurations, and the sub-nanosecond propagation delay variation keeps setup-and-hold margins adequate for SPI modes 0 through 3 at clock rates below 50 MHz.
How does the 6-pin SOT-23 package of ADG3301BKSZ-REEL compare to discrete level-shifting solutions using BJTs or MOSFETs?
A discrete MOSFET level-shifting circuit for 1 bidirectional signal typically requires 1 NMOS transistor, 2 pull-up resistors, and board space of approximately 15 mm² to 25 mm², compared to the ADG3301BKSZ-REEL SOT-23 footprint of under 10 mm² for a complete self-contained solution. The integrated device also eliminates the pull-up resistor value trade-off between bus speed and power consumption, since the active output stage does not rely on RC time constants to restore the high level within each bit period.
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About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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