Analog Devices Inc. ADG3242BRJ-R2

Overview

ADG3242BRJ-R2 from Analog Devices is a 2-bit, bidirectional, common-control bus switch IC designed for mixed-voltage digital interface applications. It provides level translation between 3.3 V, 2.5 V, and 1.8 V logic domains, features 4.5 Ω on-resistance, 225 ps propagation delay, and operates from a single 2.3 V to 3.6 V supply. It is used in ADC-to-microprocessor interfacing, hot-swap isolation, and bus switching where low capacitance and minimal timing skew are critical.

For engineers reviewing the ADG3242BRJ-R2 datasheet, ADG3242BRJ-R2 pinout, ADG3242BRJ-R2 application, or ADG3242BRJ-R2 equivalent, key selection criteria include verified level-shifting capability (3.3 V ↔ 2.5 V / 3.3 V ↔ 1.8 V / 2.5 V ↔ 1.8 V), sub-nanosecond propagation delay, SOT-23-8 package compatibility, and SEL-controlled translation mode selection.

Technical Context

The ADG3242BRJ-R2 implements a dual-channel NMOS pass-gate architecture with shared bus enable (BE) and level-select (SEL) control. Its internal voltage-clamping structure enables deterministic output limiting-e.g., 3.3 V input yields ≤2.5 V output when SEL = high, or ≤1.8 V when SEL = low-without external components.

It operates as a true bidirectional switch: signal flow direction (A→B or B→A) is determined by driving source, not internal routing. The device maintains high-impedance off-state isolation up to ±4.6 V, supports 1.5 Gbps data rates, and exhibits 710 MHz small-signal bandwidth with <45 ps p-p channel jitter at 3.3 V operation.

Key Specifications

Pinout & Package

ADG3242BRJ-R2 is housed in an 8-lead SOT-23 package (JEDEC MO-178-BA compliant, RJ-8 option), with 0.65 mm lead pitch and 1.95 mm body width. Pin 1 is marked by a dot; device orientation follows standard SOT-23 top-view convention.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bidirectional level translation applications.

Compared with TXS0102DCUR and SN74AVC2T244RSWR, ADG3242BRJ-R2 uniquely combines hardware-controlled bidirectional switching, three-mode level translation in a single supply, and sub-250 ps delay-making it optimal for synchronous, low-skew, mixed-voltage parallel interfaces where explicit timing control is required.

Availability

ADG3242BRJ-R2 is available at Aetrix Electronics and suitable for industrial control systems, medical instrumentation, telecom line cards, and embedded computing platforms requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for ADG3242BRJ-R2 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The ADG3242BRJ-R2 belongs to Analog Devices' precision bus switch and level translation product line, engineered specifically for low-latency, low-distortion interfacing between heterogeneous voltage-domain digital subsystems in demanding industrial and communications equipment.

FAQ

What voltage levels does the ADG3242BRJ-R2 support for level translation?

The ADG3242BRJ-R2 supports three translation modes: 3.3 V ↔ 2.5 V (SEL = high), 3.3 V ↔ 1.8 V (SEL = low), and 2.5 V ↔ 1.8 V (SEL = high, VCC = 2.5 V). These are achieved via internal clamping circuitry-no external components needed. All modes operate from a single 2.3 V–3.6 V supply, and the ADG3242BRJ-R2 maintains bidirectional signal flow in each configuration.

Can the ADG3242BRJ-R2 be used in hot-swap applications?

Yes, the ADG3242BRJ-R2 is explicitly qualified for hot-swap and hot-plug isolation. Its output voltage is internally clamped-e.g., to ≤2.5 V when VCC = 3.3 V and SEL = high-preventing overvoltage stress on downstream 2.5 V receivers during live insertion. The BE pin allows controlled enable/disable sequencing, and the device remains in high-Z state during power-up when BE is pulled high, making ADG3242BRJ-R2 ideal for backplane and docking station designs.

What is the maximum data rate supported by the ADG3242BRJ-R2?

The ADG3242BRJ-R2 supports up to 1.5 Gbps data rate under specified conditions (VCC = SEL = 3.3 V, VA/VB = 2 V swing). This is validated by eye diagram testing (Figure 23) and jitter characterization (45 ps p-p at 1.5 Gbps). The 710 MHz small-signal bandwidth and 225 ps propagation delay ensure signal integrity for high-speed protocols including USB 2.0, DDRx address/control buses, and parallel camera interfaces-key performance attributes of the ADG3242BRJ-R2.

How does the SEL pin affect the ADG3242BRJ-R2's translation behavior?

The SEL pin selects the internal clamping threshold: when SEL = low and VCC = 3.3 V, the ADG3242BRJ-R2 translates 3.3 V inputs to ≤1.8 V outputs; when SEL = high, it translates to ≤2.5 V (VCC = 3.3 V) or ≤1.8 V (VCC = 2.5 V). SEL is an active-low control referenced to VCC-no external pull-up/down is required. This hardware-selectable mode eliminates firmware overhead and ensures deterministic translation behavior, a defining feature of the ADG3242BRJ-R2.

Is the ADG3242BRJ-R2 compatible with standard SOT-23 footprints?

Yes, the ADG3242BRJ-R2 uses the industry-standard 8-lead SOT-23 package (RJ-8 variant), with 0.65 mm lead pitch and JEDEC MO-178-BA compliance. Its pinout matches common SOT-23-8 layouts-pin 1 (BE) is marked by a dot, and the device shares land pattern dimensions (2.90 mm × 1.60 mm body) with equivalents like TXS0102DCUR. This ensures drop-in PCB compatibility and simplifies layout reuse, a key advantage of the ADG3242BRJ-R2 in cost-sensitive designs.