Texas Instruments SN74AVC24T245ZRGR

Overview

SN74AVC24T245 from Texas Instruments is a 24-bit dual-supply bus transceiver enabling bidirectional voltage translation between 1.2-V to 3.6-V domains, with 80-pin LFBGA package, 380 Mbps max data rate (1.8-V→3.3-V), I_off partial-power-down support, and V_CC isolation. It serves as a level-shifting interface in mixed-voltage SoC interconnects.

For engineers reviewing the SN74AVC24T245 datasheet, SN74AVC24T245 pinout, SN74AVC24T245 application, or SN74AVC24T245 equivalent, key selection criteria include dual-rail supply flexibility (VCCA/VCCB = 1.2–3.6 V), 4.6-V I/O tolerance, direction-control logic referenced to VCCA, thermal resistance (R_θJA = 38.1°C/W), and 83-pin LFBGA mechanical compatibility.

Technical Context

The SN74AVC24T245 implements asynchronous bidirectional data flow controlled by six independent DIR inputs (1DIR–6DIR) and six OE inputs (1OE–6OE), all referenced to VCCA. Each of the six 4-bit channels operates independently with A-port I/Os tied to VCCA and B-port I/Os tied to VCCB.

Its architecture supports simultaneous translation across multiple voltage combinations - e.g., 1.2-V A-port ↔ 3.3-V B-port - with propagation delays as low as 2.7 ns (t_PHL, A→B, VCCA=3.3 V, VCCB=3.3 V) and output enable/disable times under 6.8 ns. The device meets JESD78 Class II latch-up immunity (>100 mA) and JEDEC ESD standards (8 kV HBM).

Key Specifications

Pinout & Package

SN74AVC24T245 is housed in an 83-pin LFBGA (GRG/ZRG) package measuring 10.00 mm × 4.50 mm, with 0.5-mm ball pitch and bottom-side thermal pad. Pin assignments follow JEDEC MO-275AC standard.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AVCH16T245DGGR and TXB0304RUT, the SN74AVC24T245 uniquely delivers 24-bit width, 1.2-V minimum supply, V_CC isolation, and 380 Mbps performance - making it the sole option for high-density, mixed-voltage, fault-resilient bus translation in advanced embedded systems.

Availability

SN74AVC24T245 is available at Aetrix Electronics and suitable for mobile baseband processing, industrial PLC backplane, and enterprise SSD controller applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for SN74AVC24T245 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 interface IC design and automotive-grade reliability validation.

The SN74AVC24T245 belongs to TI's AVC (Advanced Very-Low-Voltage CMOS) logic family, engineered specifically for high-speed, low-voltage bidirectional translation in next-generation portable, industrial, and telecom equipment.

FAQ

What voltage ranges does the SN74AVC24T245 support on its A and B ports?

The SN74AVC24T245 supports independent supply voltages from 1.2 V to 3.6 V on both VCCA (A port) and VCCB (B port). This allows translation between any combination of 1.2-V, 1.5-V, 1.8-V, 2.5-V, and 3.3-V logic domains. All I/O pins are overvoltage tolerant up to 4.6 V regardless of supply setting, enabling robust operation during voltage transients or hot-plug events.

How does the V_CC isolation feature function in the SN74AVC24T245?

The V_CC isolation feature in the SN74AVC24T245 ensures that if either VCCA or VCCB is driven to GND (e.g., during power-down or fault), all 48 I/O pins immediately enter a high-impedance state. This prevents bus contention and back-driving between powered and unpowered sections of the system, eliminating the need for external isolation circuitry in complex power-sequenced designs.

Can the SN74AVC24T245 operate with different supply voltages on VCCA and VCCB simultaneously?

Yes, the SN74AVC24T245 is explicitly designed for asymmetric dual-rail operation. For example, it can translate data from a 1.2-V A-port (VCCA = 1.2 V) to a 3.3-V B-port (VCCB = 3.3 V) at up to 100 Mbps, or from 1.8-V to 3.3-V at 380 Mbps. Control inputs (DIR/OE) are always referenced to VCCA, ensuring consistent logic thresholds regardless of VCCB value.

What is the maximum data rate achievable with the SN74AVC24T245, and under what conditions?

The maximum data rate for the SN74AVC24T245 is 380 Mbps, achieved specifically in 1.8-V to 3.3-V translation mode. Other configurations deliver 200 Mbps (<1.8-V to 3.3-V or to 2.5-V/1.8-V), 150 Mbps (to 1.5-V), and 100 Mbps (to 1.2-V). These rates reflect guaranteed AC performance under recommended operating conditions, not theoretical limits.

Does the SN74AVC24T245 support partial-power-down operation, and how is it implemented?

Yes, the SN74AVC24T245 fully supports partial-power-down via its I_off circuitry. When either VCCA or VCCB is at 0 V while the other remains powered, leakage current is limited to ±5 µA maximum. This prevents damaging reverse current flow through I/O structures, protecting both the SN74AVC24T245 and connected devices during staggered power sequencing in multi-rail systems.