Texas Instruments 74AVC4T774RSVRG4

Overview

74AVC4T774RSVRG4 from Texas Instruments is a 4-bit dual-supply bus transceiver enabling bidirectional voltage-level translation between 1.1V–3.6V domains, with independent DIR control per channel, 4.6V I/O tolerance, and 3-state outputs. It supports up to 380Mbps (1.8V→3.3V), operates across industrial temperature (–40°C to 85°C), and features I_off for partial power-down mode - used in MCU-to-peripheral SPI interface translation.

For engineers reviewing the 74AVC4T774RSVRG4 datasheet, 74AVC4T774RSVRG4 pinout, 74AVC4T774RSVRG4 application, or 74AVC4T774RSVRG4 equivalent, key selection criteria include per-channel direction control, dual-rail supply flexibility (VCCA/VCCB = 1.1V–3.6V), guaranteed 3-state timing (t_PZH/t_PHZ ≤ 9.6 ns), I_off leakage (±1 µA), and UQFN-16 (2.6 mm × 1.8 mm) package compatibility with high-density PCB layouts.

Technical Context

The 74AVC4T774RSVRG4 implements four independent bidirectional data channels, each with dedicated DIR_n inputs referenced to VCCA, enabling asymmetric flow control (e.g., A→B on channel 1, B→A on channel 2). All control inputs (DIR1–DIR4, OE) are VCCA-referenced, while A-port I/Os track VCCA and B-port I/Os track VCCB - supporting true asynchronous domain bridging without clock synchronization.

Voltage translation is achieved via CMOS input stages with level-shifted output drivers; I_off circuitry actively disables I/Os when either VCCA or VCCB is at GND, ensuring isolation and preventing backflow current. The device meets JESD78 Class II latch-up (>100 mA) and JESD22 ESD ratings (±8 kV HBM, ±1.5 kV CDM), making it suitable for mixed-voltage board interfaces subject to system-level stress.

Key Specifications

Pinout & Package

74AVC4T774RSVRG4 is packaged in a 16-pin UQFN (RSV) with 0.4 mm pitch, measuring 2.6 mm × 1.8 mm - optimized for space-constrained portable and embedded designs. Thermal pad enhances power dissipation in high-throughput operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AVCH4T245RGER and TXS0104ERUTR, the 74AVC4T774RSVRG4 uniquely delivers per-channel DIR control within the smallest UQFN-16 footprint, enabling compact, high-speed, mixed-direction bridging where protocol-level flow management is required - critical for SPI, custom parallel buses, and FPGA-to-ASIC interconnects.

Availability

74AVC4T774RSVRG4 is available at Aetrix Electronics and suitable for industrial sensor interfaces, SPI peripheral bridging, and multi-rail power-sequenced embedded systems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for 74AVC4T774RSVRG4 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 connectivity technologies, with decades of expertise in precision logic and interface solutions.

The SN74AVC family targets low-voltage, high-speed bidirectional translation in space-constrained applications - designed specifically for seamless interoperability between heterogeneous voltage domains in modern MCU, FPGA, and SoC-based systems.

FAQ

What is the maximum supported data rate for 74AVC4T774RSVRG4 in 1.8V-to-3.3V translation?

The 74AVC4T774RSVRG4 supports up to 380 Mbps when translating from 1.8V to 3.3V, as verified in TI's SCES693I datasheet Section 5.6–5.10 switching characteristics. This performance is achievable under recommended operating conditions (VCCA = 1.8V ± 0.15V, VCCB = 3.3V ± 0.3V, T_A = –40°C to 85°C) with proper signal integrity layout. The 74AVC4T774RSVRG4 maintains this rate without external termination or timing compensation.

Can 74AVC4T774RSVRG4 operate with VCCA = 1.2V and VCCB = 1.5V?

Yes, the 74AVC4T774RSVRG4 is fully specified for operation with VCCA = 1.2V and VCCB = 1.5V, as confirmed in Section 5.3 Recommended Operating Conditions and Figure 5-1/5-2 typical characteristics. Both supplies fall within the 1.1V–3.6V range, and the device delivers guaranteed t_PLH/t_PHL ≤ 7.5 ns (Section 5.6) and I_off ≤ ±1 µA at these voltages - making it suitable for ultra-low-power 1.2V/1.5V system interconnects.

How does the I_off feature function in 74AVC4T774RSVRG4 during partial power-down?

The I_off circuitry in the 74AVC4T774RSVRG4 disables all A- and B-port output drivers when either VCCA or VCCB is at 0V, limiting leakage current to ±1 µA (Section 5.5). This prevents backflow current into a powered rail when the other rail is unpowered - essential for safe hot-swap, battery-backed subsystems, and rail-sequenced power architectures. The 74AVC4T774RSVRG4 maintains this behavior across –40°C to 85°C.

Is pull-up resistance required on the OE pin of 74AVC4T774RSVRG4 for reliable power-up behavior?

Yes, TI recommends tying OE to VCCA through a pull-up resistor to ensure high-impedance outputs during power-up/power-down (Section 8.3). The minimum value depends on the driver's sink capability, but typical values range from 4.7 kΩ to 10 kΩ. This prevents undefined states on A/B ports before VCCA and VCCB stabilize - a requirement explicitly stated for robust operation of the 74AVC4T774RSVRG4 in mixed-rail systems.

Does 74AVC4T774RSVRG4 support translation to 1.2V logic levels?

Yes, the 74AVC4T774RSVRG4 supports translation to 1.2V logic levels, with documented 100 Mbps performance (Section 1 Features) and validated operation down to VCCA/VCCB = 1.2V (Section 5.3). At 1.2V, it delivers VOL ≤ 0.25V and VOH ≥ 0.95V (Section 5.5), meeting standard 1.2V LVCMOS thresholds. The 74AVC4T774RSVRG4 is commonly deployed in 1.2V core voltage domains interfacing with higher-voltage peripherals.