Analog Devices Inc. ADG3246BCP

Overview

ADG3246BCP from Analog Devices is a 2.5 V/3.3 V, 10-bit, 2-port level-translating bus switch with 4.5 Ω on-resistance, 225 ps propagation delay, and support for 1.244 Gbps data rates. It enables bidirectional voltage translation between 3.3 V ↔ 2.5 V, 2.5 V ↔ 1.8 V, and 3.3 V ↔ 1.8 V domains in mixed-supply digital interfaces.

For engineers reviewing the ADG3246BCP datasheet, ADG3246BCP pinout, ADG3246BCP application, or ADG3246BCP equivalent, this device serves as a low-latency, low-capacitance interface solution for ADC-to-microcontroller bridging, hot-swap isolation, and high-speed bus domain partitioning where precise level control and timing integrity are critical.

Technical Context

The ADG3246BCP implements a single-pole, single-throw NMOS-based switch architecture per channel, with internal level-shifting circuitry controlled by the active-low SEL pin. Its operation relies on VCC-supplied rail clamping to enforce output voltage limits-2.5 V when VCC = 3.3 V and SEL = high, 1.8 V when SEL = low, and 1.8 V when VCC = 2.5 V and SEL = high.

It features true bidirectional signal flow with no direction pin, 5 pF off-capacitance per port, and sub-2 ns enable/disable times across temperature. The device maintains high-impedance during power-up/down when BE is pulled up to VCC, and supports hot-plug protection via inherent output voltage limiting below VCC.

Key Specifications

Pinout & Package

The ADG3246BCP is housed in a 24-lead LFCSP package (4 mm × 4 mm × 0.75 mm) with exposed pad (EPAD) for thermal and electrical grounding. Pin 1 is SEL (Level Translation Select, active low); pins 2–6 and 20–24 are bidirectional A-port signals (A0–A9); pins 8–17 are bidirectional B-port signals (B0–B9); pin 18 is BE (Bus Enable, active low); pin 19 is VCC; pin 7 is GND.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar level-translating bus switch applications.

Compared with SN74AVC16T245DGGR and TXS0108EPRJR, the ADG3246BCP delivers superior speed (225 ps vs. ≥3.5 ns), lower on-resistance (4.5 Ω vs. ≥6.5 Ω), and unique SEL-driven 3.3 V→1.8 V clamping-making it the only option qualified for simultaneous high-speed, hot-swap-safe, single-supply level translation in 10-bit parallel interfaces.

Availability

ADG3246BCP is available at Aetrix Electronics and suitable for industrial automation interfaces, high-speed data acquisition systems, and embedded docking station designs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADG3246BCP 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, communications, and industrial markets since 1965.

The ADG3246BCP belongs to Analog Devices' high-speed bus switch product line, engineered specifically for low-latency, low-noise voltage domain bridging in mixed-supply digital systems where timing integrity and hot-swap safety are design-critical.

FAQ

What is the maximum operating temperature range for the ADG3246BCP?

The ADG3246BCP is rated for continuous operation from −40°C to +105°C, as confirmed in the Ordering Guide and Absolute Maximum Ratings table. This full industrial temperature range is supported across all specified electrical parameters including on-resistance, propagation delay, and level translation accuracy-making ADG3246BCP suitable for under-hood automotive modules and factory-floor controllers where ambient heat exceeds 85°C.

How does the SEL pin configure level translation in the ADG3246BCP?

The SEL pin on the ADG3246BCP is an active-low control that selects internal clamping thresholds: when SEL = 0 V (low), the ADG3246BCP enables 3.3 V → 1.8 V translation; when SEL = VCC (high), it supports either 3.3 V → 2.5 V or 2.5 V → 1.8 V translation depending on VCC. This configuration is explicitly defined in Table 6 (Truth Table) and validated in Figures 29–34 of the datasheet-no external components are needed to set translation mode.

Can the ADG3246BCP be used for analog signal switching?

Yes-the ADG3246BCP supports analog signal switching up to 610 MHz small-signal bandwidth and exhibits 5 pF off-capacitance, as stated in the Features and Specifications sections. Its NMOS-only switch architecture provides low THD and flat frequency response within its bandwidth limit, making ADG3246BCP appropriate for video graphics routing, audio multiplexing, and sensor signal conditioning where DC coupling and low distortion are required.

What is the recommended layout practice for the EPAD on the ADG3246BCP?

The exposed pad (EPAD) on the ADG3246BCP must be soldered to a solid PCB ground plane using ≥4 thermal vias, as specified in Table 3 (Thermal Resistance) and Package and Pinout section. This connection provides both thermal dissipation (θJA = 35°C/W) and low-impedance grounding for noise suppression. Leaving the EPAD unconnected or floating violates JEDEC JESD-51 thermal test conditions and risks exceeding junction temperature limits under sustained load.

Does the ADG3246BCP support hot-swap protection, and how is it implemented?

Yes-the ADG3246BCP provides inherent hot-swap protection via output voltage clamping: when VCC = 3.3 V and SEL = 0, outputs are limited to ≤1.8 V; when VCC = 3.3 V and SEL = 1, outputs are limited to ≤2.5 V. This behavior is documented in Applications Information (pp. 14–15) and verified in Figures 30, 32, and 34. It prevents overvoltage damage to downstream 1.8 V or 2.5 V receivers during live insertion-no external TVS or current-limiting circuits are required for basic hot-swap safety.