Toshiba Semiconductor and Storage TC74VCX245FTEL

Overview

TC74VCX245FTEL from Toshiba Electronic Devices & Storage Corporation is a low-voltage octal bus transceiver with 3.6-V tolerant inputs/outputs, operating from 1.2 V to 3.6 V supply, delivering 3.5 ns max propagation delay at 3.3 V, ±24 mA output drive, and bidirectional level-shifting capability between 1.2–3.3 V domains. It serves as a voltage-level translating interface in mixed-supply digital systems such as FPGA-to-ASIC interconnects.

For engineers reviewing the TC74VCX245FTEL datasheet, TC74VCX245FTEL pinout, TC74VCX245FTEL application, or TC74VCX245FTEL equivalent, key selection criteria include its wide VCC range (1.2–3.6 V), guaranteed -40°C to +125°C operation for post-April 2020 lots, 3-state control via OE/DIR, TSSOP20 package compatibility, and 3.6-V tolerance enabling safe interfacing with legacy 3.3-V buses.

Technical Context

The TC74VCX245FTEL implements a dual-bus bidirectional transceiver architecture with independent DIR (direction) and OE (output enable) control signals, supporting A-to-B or B-to-A data flow per channel. Its CMOS design ensures low static power consumption while maintaining high-speed switching across multiple voltage rails.

It features overvoltage-tolerant I/O pins rated to 3.6 V regardless of VCC, enabling robust level translation without external clamping diodes. All inputs include ESD protection circuits, and the device supports hot-swap capable operation when powered down, with power-off leakage current ≤±20 µA at 125°C.

Key Specifications

Pinout & Package

TSSOP20 package: 20-pin thin shrink small outline package, 0.65 mm pitch, 6.5 mm × 4.4 mm body size, 0.08 g typical weight, lead-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC245APWR and 74ALVC245MTCX, the TC74VCX245FTEL uniquely supports true 1.2 V operation and guaranteed -40°C to +125°C functionality in a drop-in TSSOP20 package-critical for next-gen automotive and industrial edge controllers requiring ultra-low-voltage logic compatibility and extended thermal resilience.

Availability

TC74VCX245FTEL is available at Aetrix Electronics and suitable for industrial automation, automotive infotainment, and embedded microcontroller peripheral expansion requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for TC74VCX245FTEL 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

Toshiba Electronic Devices & Storage Corporation designs and manufactures discrete semiconductors, power devices, and logic ICs for industrial, automotive, and consumer applications.

The TC74VCX245FTEL belongs to Toshiba's VCX-series low-voltage CMOS logic family, engineered specifically for voltage-scalable bidirectional bus interfacing in mixed-supply systems with stringent ESD and thermal reliability requirements.

FAQ

What is the minimum supply voltage supported by the TC74VCX245FTEL?

The TC74VCX245FTEL supports a minimum supply voltage of 1.2 V, verified across all operating conditions including -40°C to +125°C ambient. This enables direct integration with ultra-low-power 1.2 V cores in modern SoCs and MCUs without intermediate regulation, preserving system efficiency and reducing bill-of-materials complexity. The TC74VCX245FTEL maintains full functionality-including 3.6-V tolerant I/O and ±24 mA drive-at this rail.

Does the TC74VCX245FTEL support operation at 125°C ambient temperature?

Yes, the TC74VCX245FTEL is fully specified for operation from -40°C to +125°C-but only for units manufactured after April 2020, as explicitly stated in Toshiba's Rev. 3.0.A datasheet. This extended temperature grade makes the TC74VCX245FTEL suitable for under-hood automotive modules and industrial control cabinets where thermal margins exceed standard industrial limits. The TC74VCX245FTEL meets all DC and AC specifications across this full range.

Can the TC74VCX245FTEL safely interface a 1.2 V microcontroller with a 3.3 V peripheral?

Yes-the TC74VCX245FTEL provides true bidirectional level translation between 1.2 V and 3.3 V domains. Its 3.6-V tolerant I/O pins accept 3.3 V signals while powered from 1.2 V, and its output VOH/VOL specs remain valid across the full VCC range. No external resistors or clamps are needed. This capability is intrinsic to the TC74VCX245FTEL's architecture and confirmed in its absolute maximum and operating range tables.

What is the maximum propagation delay of the TC74VCX245FTEL at 3.3 V supply?

The maximum propagation delay (tPLH/tPHL) of the TC74VCX245FTEL is 3.5 ns when VCC = 3.0 V to 3.6 V and operating at -40°C to +85°C ambient, per Toshiba's AC characteristics table. At +125°C, the max delay increases to 4.2 ns-still enabling reliable operation in high-speed parallel data paths up to ~200 MHz. This value applies uniformly across all eight channels of the TC74VCX245FTEL.

Is the TC74VCX245FTEL pin-compatible with standard 20-pin TSSOP octal transceivers?

Yes-the TC74VCX245FTEL uses the industry-standard TSSOP20 package with 0.65 mm pitch and follows JEDEC MO-153 mechanical dimensions. Its pin assignment matches conventional octal transceiver layouts: A0–A7 and B0–B7 occupy opposing sides, with DIR and OE on dedicated control pins. This allows direct PCB footprint reuse with devices like SN74LVC245APWR and 74ALVC245MTCX, provided thermal and timing margins are re-verified for the TC74VCX245FTEL's extended temperature capability.