Toshiba Semiconductor and Storage TC7WPN3125FK(T5L,F

Overview

TC7WPN3125FK from Toshiba Electronic Devices & Storage Corporation is a dual-supply, 2-bit CMOS bus buffer enabling voltage-level translation between mismatched logic domains - specifically supporting A-side inputs at 1.2 V to 2.7 V and B-side outputs at 1.65 V to 3.6 V. It features 3-state output control via OE, 3.6 V-tolerant I/O, and operates across -40°C to +125°C for automotive and industrial interface applications.

For engineers reviewing the TC7WPN3125FK datasheet, TC7WPN3125FK pinout, TC7WPN3125FK application, or TC7WPN3125FK equivalent, this device serves as a low-power, high-speed bidirectional voltage translator in mixed-supply systems - especially where isolation, wide V_CC range flexibility, and ultra-small US8 packaging are critical selection criteria.

Technical Context

The TC7WPN3125FK implements independent dual-supply operation with V_CCA powering the input (A1/A2/OE) side and V_CCB powering the output (B1/B2) side. Its architecture supports true level-shifting without direction control pins, relying instead on OE-driven 3-state output enable/disable.

All I/O pins tolerate up to 3.6 V regardless of supply state, and floating A-bus is permitted when OE = "H". The device uses silicon gate CMOS technology and includes built-in ESD protection circuits on all inputs and outputs.

Key Specifications

Pinout & Package

Package: US8 (JEDEC SOT-765), 8-pin ultra-small surface-mount package with 0.5 mm pitch and 2.1 mm × 2.0 mm body size.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-supply bus buffer applications.

Compared with TXS0102DCUR and SN74AVC2T244RSWR, the TC7WPN3125FK offers superior thermal robustness (125°C rating), smallest package footprint (US8), and guaranteed 3.6 V I/O tolerance - making it optimal for space- and temperature-constrained automotive and industrial edge nodes where explicit OE control is mandatory.

Availability

TC7WPN3125FK is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O expansion, and portable medical sensor hubs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TC7WPN3125FK 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 high-reliability semiconductor components for automotive, industrial, and consumer applications, with emphasis on power efficiency, signal integrity, and long-term manufacturability.

The TC7WPN3125FK belongs to Toshiba's TC7WP series of dual-supply CMOS interface buffers, engineered specifically for voltage translation in mixed-supply embedded systems where space, power, and thermal resilience are primary constraints.

FAQ

What is the maximum allowable voltage on TC7WPN3125FK I/O pins when V_CCA or V_CCB is unpowered?

The TC7WPN3125FK guarantees 3.6 V tolerance on all inputs and outputs - including A1, A2, OE, B1, and B2 - even when either V_CCA or V_CCB is at 0 V. This power-down protection prevents backdrive damage and eliminates need for external clamping, making TC7WPN3125FK suitable for hot-plug and partial-power-down scenarios in modular systems.

Can TC7WPN3125FK operate with V_CCA = 1.2 V and V_CCB = 1.8 V simultaneously?

Yes - the TC7WPN3125FK supports V_CCA = 1.2 ± 0.1 V and V_CCB = 1.8 ± 0.15 V concurrently, with measured t_PD ≤ 43 ns (max) and t_PZL/t_PZH ≤ 78 ns (max) over -40°C to +85°C. This configuration is validated in datasheet section 10.2.15 and enables ultra-low-voltage subsystem bridging in energy-harvesting and battery-constrained IoT nodes.

Is floating the A-bus allowed when OE = "H" on TC7WPN3125FK?

Yes - the TC7WPN3125FK explicitly permits floating A1 and A2 inputs when OE = "H", as confirmed in Feature (7) of the datasheet. In this state, the A-side inputs are internally isolated, eliminating risk of leakage-induced logic contention or unintended current paths, which simplifies PCB routing in sparse-bus architectures.

What is the recommended decoupling for TC7WPN3125FK V_CCA and V_CCB pins?

Each supply pin (V_CCA and V_CCB) requires a dedicated 0.1 µF ceramic capacitor placed within 2 mm of the pin and connected to the nearest GND pad. For systems with fast-switching loads, add a 1 µF bulk capacitor per supply rail. This layout ensures stable operation across all supported V_CC combinations and prevents supply droop-induced timing violations in TC7WPN3125FK.

Does TC7WPN3125FK support operation at -40°C to +125°C across all V_CCA/V_CCB combinations?

Yes - the TC7WPN3125FK is fully characterized from -40°C to +125°C for all specified V_CCA/V_CCB pairs (e.g., 1.8 V/3.3 V, 2.5 V/3.3 V, 1.5 V/2.5 V). DC and AC parameters including VIH/VIL, VOH/VOL, t_PD, and leakage are guaranteed across this full temperature range, as documented in sections 10.1.2 and 10.2.2–10.2.4 of the datasheet.