Texas Instruments SN74AVC16245DGG

Overview

SN74AVC16245DGG from Texas Instruments is a 16-bit noninverting bus transceiver with 3-state outputs, designed for asynchronous bidirectional data communication between mixed-voltage buses (1.2 V to 3.6 V). It features Dynamic Output Control (DOC™), Ioff partial-power-down support, and ±24 mA dynamic drive capability at 2.5 V - enabling low-noise, high-speed interconnect in FPGA-to-ASIC or processor-to-peripheral interfaces.

For engineers reviewing the SN74AVC16245DGG datasheet, SN74AVC16245DGG pinout, SN74AVC16245DGG application, or SN74AVC16245DGG equivalent, key selection considerations include its 48-pin TSSOP package, dual-octant direction control (DIR), independent output-enable (OE), overvoltage-tolerant I/Os up to 4.6 V, and guaranteed operation from –40°C to 85°C.

Technical Context

The SN74AVC16245DGG implements a dual 8-bit transceiver architecture with separate DIR and OE controls per octant, allowing flexible A↔B or B↔A data flow without external logic. Its DOC™ circuit dynamically modulates output impedance during signal transitions - lowering it initially for fast edge drive, then raising it to suppress ringing and crosstalk.

It supports true mixed-voltage operation: inputs tolerate up to 4.6 V regardless of VCC (1.2–3.6 V), and Ioff blocks current backflow during partial power-down. Propagation delay is ≤2 ns at 2.5 V, with static output drive specified at ±12 mA (VCC ≥ 3 V) and ±8 mA (VCC = 2.3 V).

Key Specifications

Pinout & Package

SN74AVC16245DGG uses a 48-pin Plastic Thin Shrink Small-Outline (TSSOP) package (JEDEC MO-153 compliant), 12.6 mm × 6.2 mm × 1.2 mm body, with 0.5-mm lead pitch and gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bus transceiver applications.

Compared with SN74AVC16245DGVR and SN74LVC16245ADGGR, the SN74AVC16245DGG uniquely combines 1.2-V minimum operation, DOC™-enabled noise suppression, and 4.6-V I/O tolerance - making it the optimal choice for mixed-voltage, high-integrity data paths in industrial and embedded systems.

Availability

SN74AVC16245DGG is available at Aetrix Electronics and suitable for industrial automation interfaces, FPGA co-processor interconnects, and memory expansion subsystems requiring stable component supply across extended temperature and multi-rail voltage conditions.

Supply support for SN74AVC16245DGG 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions, with decades of innovation in high-speed interface ICs and widebus technology.

The SN74AVC16245DGG belongs to TI's AVC (Advanced Very-low-voltage CMOS) logic family - engineered specifically for low-voltage, mixed-signal system interconnect where noise immunity, power efficiency, and voltage flexibility are critical.

FAQ

What is the minimum operating voltage for the SN74AVC16245DGG?

The SN74AVC16245DGG operates down to 1.2 V VCC, with full functionality including Ioff and overvoltage tolerance maintained across the entire 1.2–3.6 V range. At 1.2 V, it supports data retention mode; functional operation begins at 1.4 V per TI's recommended operating conditions. This makes the SN74AVC16245DGG suitable for ultra-low-power portable and battery-operated systems where rail voltage scaling is essential.

Does the SN74AVC16245DGG support hot-plug or partial-power-down operation?

Yes, the SN74AVC16245DGG includes Ioff circuitry that actively disables outputs and blocks current backflow when VCC = 0 V - enabling safe hot-insertion into live backplanes or modular systems. During partial-power-down, Ioff limits leakage to ±10 µA, preventing damage to unpowered downstream devices. This feature is fully characterized and guaranteed across –40°C to 85°C, making the SN74AVC16245DGG ideal for redundant power architectures and field-upgradeable hardware.

How does the Dynamic Output Control (DOC™) circuit in the SN74AVC16245DGG reduce noise?

The DOC™ circuit in the SN74AVC16245DGG dynamically adjusts output impedance during signal transitions: it first lowers impedance to deliver high current for fast edge rates, then rapidly increases impedance to dampen ringing and suppress crosstalk. This results in clean 2-ns propagation delays without external termination or layout compromises. Measured VOL/VOH curves confirm stable drive strength across load currents up to ±24 mA - a key differentiator of the SN74AVC16245DGG versus static-drive transceivers.

Can the SN74AVC16245DGG interface between 1.8-V and 3.3-V buses without external level shifters?

Yes, the SN74AVC16245DGG can directly interface 1.8-V and 3.3-V buses. Its inputs and outputs tolerate up to 4.6 V regardless of VCC, and its VCC range (1.2–3.6 V) covers both rails. When powered at 1.8 V, it correctly interprets 3.3-V inputs (VIH threshold = 0.65 × VCC = 1.17 V), and when powered at 3.3 V, it drives 1.8-V receivers with VOH ≥ 2.3 V. No external components are needed - a core capability validated in the SN74AVC16245DGG datasheet Figure 1 and Recommended Operating Conditions table.

What is the thermal performance of the SN74AVC16245DGG in its TSSOP package?

The SN74AVC16245DGG in the DGG (TSSOP-48) package has a junction-to-ambient thermal resistance (θJA) of 70°C/W, measured per JEDEC JESD51. This value assumes standard 2-layer PCB layout with 1-in² copper pour under the package. Under typical industrial loads (<10 mA average output current), junction temperature rise remains below 15°C - well within the –40°C to 85°C operating range. The DGG package's 6.2-mm width and 4 VCC/GND pins enhance thermal stability versus narrower alternatives like the DGV variant.