TC7WPN3125FK,LF(CT

Overview

The TC7WPN3125FK,LF(CT is a dual-supply, advanced high-speed CMOS 2-bit bus buffer designed for mixed-voltage systems. It interfaces between A-bus (VCCA: 1.1 V to 2.7 V) and B-bus (VCCB: 1.65 V to 3.6 V). The device supports operating temperatures of -40°C to 85°C. Key electrical parameters include propagation delays ranging from 13.7 ns to 43 ns depending on supply voltages, and output currents of up to 3 mA minimum at VCCB = 3.0 V. Inputs and outputs tolerate up to 3.6 V with power-down protection.

Feature Summary

• Dual-supply architecture enabling voltage translation between low-voltage buses (1.2 V–2.5 V) and higher-voltage buses (1.8 V–3.6 V).
• Provides overvoltage tolerance and power-down protection on all inputs and outputs up to 3.6 V.
• Features an enable input (OE) that isolates signal lines when disabled, allowing the A-bus to float.
• Incorporates protection circuits against static discharge and transient excess voltage on all pins.

Applications

• Interface between 1.2-V, 1.5-V, 1.8-V, or 2.5-V buses and 1.8-V, 2.5-V, or 3.6-V buses.
• Mixed supply system data routing in portable devices such as PDAs and cellular phones.
• Battery-driven applications requiring low power dissipation during inactive states.

Procurement Notes

Verify the ordering suffix (CT) confirms the -40°C to 85°C operating temperature range, distinct from other variants. Confirm RoHS compliance status directly with Toshiba Semiconductor and Storage. Ensure design adheres to absolute maximum ratings, specifically avoiding voltage application to VCCB while VCCA is off. Review the Toshiba Semiconductor Reliability Handbook for derating guidelines.

Selection Notes

Select this component for bidirectional data transfer between disparate voltage domains within the specified ranges. The US8 package suits space-constrained designs. Consider the propagation delay variations relative to specific VCCA and VCCB combinations. Ensure unused inputs are tied to VCC or GND to maintain stable operation. Validate that the required output current capabilities meet the load requirements of the destination bus.

Part Context

This part belongs to the TC7WP series of low-voltage, low-power CMOS digital integrated circuits. It utilizes silicon gate CMOS technology for high-speed operation. The device functions as a bus buffer rather than a simple switch, facilitating level shifting between two independent power supplies. It is manufactured by Toshiba Electronic Devices & Storage Corporation.

Replacement Considerations

Toshiba recommends the TC7WP3125FK,LF(CT as a manufacturer-recommended substitute. Verify pinout compatibility and electrical specifications before substitution.

FAQ

What is the maximum voltage tolerance for the inputs and outputs?

All inputs and outputs are tolerant up to 3.6 V and include power-down protection.

How does the OE pin affect the A-bus when disabled?

When OE is High, the device disables, effectively isolating the signal lines and permitting the A-bus to float.

What is the operating temperature range for the (CT) suffix variant?

Devices with the ordering part number ending in (CT) support an operating temperature range of -40°C to 85°C.