TC7WP3125FK(T5L,F)

Overview

The TC7WP3125FK is a dual-supply, advanced high-speed CMOS 2-bit bus buffer fabricated with silicon gate technology. It facilitates interface between low-voltage buses (1.2 V to 2.5 V) and higher voltage buses (1.8 V to 3.6 V). The device features overvoltage tolerant inputs and outputs up to 3.6 V. Operating supply ranges include VCCA from 1.1 V to 2.7 V and VCCB from 1.65 V to 3.6 V. Propagation delay varies by voltage configuration, ranging from 6.8 ns at VCCA=2.5V/VCCB=3.3V to 30 ns at VCCA=1.2V/VCCB=1.8V. Output drive capability reaches 12 mA minimum at VCCB=3.0V.

Feature Summary

• Dual-supply architecture enabling direct interfacing between mixed voltage logic levels without external level shifters.
• Overvoltage tolerance on all inputs and outputs allows safe connection to 3.6 V systems regardless of the A-side supply state.
• Power-down protection prevents leakage current flow when power is removed, ensuring isolation during standby modes.
• OE input controls three-state output, allowing effective signal line isolation when disabled.

Applications

• Interface between 1.2-V, 1.5-V, or 1.8-V buses and 1.8-V, 2.5-V, or 3.6-V buses in mixed supply systems.
• Battery-driven portable applications such as PDAs and cellular phones requiring low power dissipation.
• Data bus buffering where signal isolation is required via the OE control pin.

Procurement Notes

Verify the specific ordering suffix to confirm the operating temperature range. Devices ending in (CT) are rated for -40°C to 85°C, while other suffixes support -40°C to 125°C. Confirm package availability matches the US8 form factor. Ensure design accounts for absolute maximum ratings regarding supply voltage differentials between VCCA and VCCB pins.

Selection Notes

Select this component when bridging disparate voltage domains within a single system. It supports multiple VCCA/VCCB combinations including 1.2V/3.3V, 1.5V/2.5V, and 1.8V/3.6V. Consider the propagation delay specifications relative to the target bus speed. The US8 package is suitable for space-constrained designs. Verify that the required output current aligns with the load capacitance and drive requirements.

Part Context

This part belongs to Toshiba's TC7WP series of low-voltage, low-power CMOS digital integrated circuits. It utilizes silicon gate CMOS technology for high-speed operation. The device is designed specifically for data bus applications requiring voltage translation between different logic families or supply rails.

Replacement Considerations

TC7WPN3125FK(T5L,F)

FAQ

Can the A-bus float when the device is disabled?

Yes, the A-bus is permitted to float when the OE input is High.

What happens if a signal is applied to the bus pins while in output mode?

Applying a signal to any bus pins while in the output mode may result in damage to the device.

Is it possible to supply voltage to VCCB when VCCA is off?

No, VCCB should not be supplied with voltage when VCCA is in the OFF state.