Texas Instruments 74AVC16T245DGGR-P

Overview

74AVC16T245DGGR-P from Texas Instruments is a 16-bit dual-supply noninverting bus transceiver enabling bidirectional voltage-level translation between 1.2 V and 3.3 V domains. It features independent A- and B-port supplies (VCCA/VCCB), tri-state outputs controlled by 1OE/2OE, direction control via 1DIR/2DIR, and supports up to 380 Mbps data rate (1.8 V → 3.3 V). It is used in mixed-voltage interconnects between processors and peripherals in portable electronics.

For engineers reviewing the 74AVC16T245DGGR-P datasheet, 74AVC16T245DGGR-P pinout, 74AVC16T245DGGR-P application, or 74AVC16T245DGGR-P equivalent, key selection criteria include dual-rail supply flexibility (1.2 V–3.6 V per port), Ioff partial-power-down support, VCC isolation behavior, 4.6 V I/O tolerance, and guaranteed timing across VCCA/VCCB combinations.

Technical Context

The 74AVC16T245DGGR-P implements asynchronous bidirectional data flow using two independent control domains: DIR and OE inputs are referenced to VCCA, while A-port I/Os track VCCA and B-port I/Os track VCCB. Its logic-level translation is achieved through rail-referenced input thresholds and output drivers compliant with respective supply voltages.

Functional modes are strictly determined by OE and DIR states: OE = L enables translation (A↔B depending on DIR); OE = H forces both ports into high-impedance. The VCC isolation feature guarantees Hi-Z on both ports if either VCCA or VCCB = GND, preventing bus contention during power sequencing.

Key Specifications

Pinout & Package

The 74AVC16T245DGGR-P is packaged in a 48-pin TSSOP (DGG) with body size 12.50 mm × 6.10 mm and 0.5 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AVCH16T245DGGR and TXB0108PWR, the 74AVC16T245DGGR-P provides deterministic manual direction control, higher drive capability, and guaranteed 380 Mbps performance - making it optimal for high-bandwidth, multi-lane synchronous bus bridging where timing predictability is critical.

Availability

74AVC16T245DGGR-P is available at Aetrix Electronics and suitable for mobile processor interface, industrial PLC backplane, and enterprise SSD controller applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for 74AVC16T245DGGR-P 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 company specializing in analog, embedded processing, and connectivity technologies, with over 90 years of innovation in industrial, automotive, and consumer electronics.

The SN74AVC16T245 product line delivers high-speed, low-voltage bidirectional translation for mixed-rail digital systems - designed specifically to eliminate voltage incompatibility between next-generation processors, memory, and peripherals.

FAQ

What is the maximum supported data rate for 74AVC16T245DGGR-P when translating from 1.8 V to 3.3 V?

The 74AVC16T245DGGR-P supports a maximum data rate of 380 Mbps when translating from 1.8 V (VCCA) to 3.3 V (VCCB), as specified in the official Texas Instruments datasheet SCES551F. This rating is validated under recommended operating conditions with CL = 15 pF and defined input slew rates. Actual achievable throughput depends on PCB layout, termination, and signal integrity margins.

Does 74AVC16T245DGGR-P support partial power-down operation?

Yes, the 74AVC16T245DGGR-P fully supports partial power-down operation via its Ioff specification. When either VCCA or VCCB is at 0 V, the Ioff circuitry disables all I/O outputs and limits leakage current to ±5 µA maximum, preventing damaging backflow current into powered-down sections of the system. This feature is explicitly tested and guaranteed per JESD78 Class II latch-up standards.

How does the VCC isolation feature behave in 74AVC16T245DGGR-P during power sequencing?

In the 74AVC16T245DGGR-P, VCC isolation ensures that if either VCCA or VCCB is driven to GND (e.g., during power-down), both A and B ports automatically enter a high-impedance state - regardless of DIR or OE logic levels. This prevents false logic states or contention on either bus during asymmetric power-up or brownout events, a critical safeguard in multi-rail systems.

Can 74AVC16T245DGGR-P translate between 1.2 V and 2.5 V logic domains?

Yes, the 74AVC16T245DGGR-P is fully specified for 1.2 V ↔ 2.5 V translation. With VCCA = 1.2 V and VCCB = 2.5 V (or vice versa), it delivers guaranteed timing performance (e.g., tPLH ≤ 5.2 ns), supports ±8 mA drive strength, and maintains 4.6 V I/O tolerance on both sides. This capability is confirmed across all switching characteristic tables in the datasheet.

What is the thermal resistance (RθJA) of the 74AVC16T245DGGR-P in its TSSOP package?

For the 74AVC16T245DGGR-P in the DGG (TSSOP-48) package, the junction-to-ambient thermal resistance RθJA is 69.9 °C/W, as measured per JEDEC JESD51-2 standards. This value assumes standard 2-layer PCB mounting with 1 in² copper pad. Derating curves and thermal metrics for alternative board layouts are provided in Section 6.4 of the TI datasheet SCES551F.