TC7MB3257CFK-EL(M)

Overview

The TC7MB3257CFK-EL(M) is a low capacitance CMOS quad 1-of-2 multiplexer/demultiplexer manufactured by Toshiba Semiconductor and Storage. It operates within a supply voltage range of 4.0 to 5.5 V and functions across an operating temperature range of -40 to 85 °C. The device features four independent multiplexers with common select (S) and output enable (OE) inputs. Key electrical characteristics include a typical on-resistance (RON) of 3 Ω at VCC=4.5V and a switch-on capacitance (CI/O) of 8.5 pF at VCC=5V. The component is housed in a 16-pin VSSOP package.

Feature Summary

• Low on-resistance and low capacitance design for minimal propagation delay
• Power-down protection for control and I/O inputs
• Compatible with TTL outputs for control inputs
• High ESD protection performance

Applications

• Signal routing in high-speed data transmission systems
• Multiplexing applications requiring low signal distortion
• Portable electronic devices utilizing 5V logic interfaces

Procurement Notes

Verify the specific suffix EL(M) against official Toshiba documentation to confirm the exact packaging configuration and manufacturing lot details. Ensure that the procurement channel provides valid traceability for the semiconductor components. Confirm RoHS compliance status through the manufacturer's latest environmental declarations before finalizing orders.

Selection Notes

Select this component when a quad 1-of-2 multiplexer is required for 5V logic systems with strict low capacitance constraints. The VSSOP16 package is suitable for space-constrained surface mount designs. Consider the 3 Ω typical on-resistance for signal integrity requirements. Verify compatibility with existing TTL-level control signals if interfacing with legacy logic families.

Part Context

This part belongs to the TC7MB3257 series of low capacitance CMOS digital integrated circuits. It serves as a specialized signal switching solution designed for applications where signal integrity and speed are critical. The device integrates four independent channels, providing a compact alternative to discrete switching solutions while maintaining robust ESD protection and power-down safety features.

Replacement Considerations

The datasheet notes pin compatibility with the TC7MB3257FT/FK variants. These parts share identical functionality and pin assignments but differ in physical package types (TSSOP or VQON). Verify package dimensions and thermal characteristics when substituting between these specific form factors.

FAQ

How does the Output Enable (OE) input affect the switch state?

When the OE input is held at a high level, the switches remain open regardless of the select input states, resulting in a high-impedance state between the switches.

What is the ESD protection rating for this device?

The device offers an ESD performance of ≥ ±200 V for the machine model and ≥ ±2000 V for the human body model.

Can unused control pin inputs be left floating?

No, unused control pin inputs must be tied to either VCC or GND to ensure proper operation and prevent undefined states.