TC7MB3245CFK-EL(M)

Overview

The TC7MB3245CFK-EL(M) is an octal bus switch manufactured by Toshiba Semiconductor and Storage. It provides eight bits of high-speed TTL-compatible bus switching in a standard '245 device pinout. The device operates within a supply voltage range of 4.5 V to 5.5 V. Key electrical parameters include a maximum propagation delay of 0.25 ns, a typical on-resistance of 5 Ω, and ESD protection ratings of ±200 V (machine model) and ±2000 V (human body model). It supports an operating temperature range from -40 °C to +85 °C.

Feature Summary

• Provides eight bits of high-speed TTL-compatible bus switching with minimal propagation delay due to low on-state resistance.
• Features built-in protection circuits against static discharge for all inputs.
• Functionally equivalent to FST/CBT 3245 types and pin-compatible with the 74xx245 type.

Applications

• High-speed data transmission between ports
• TTL-compatible logic interfacing
• Low-voltage signal routing

Procurement Notes

Verify the specific package suffix (FT or FK) and reel configuration (EL) required for your assembly line. Confirm that the 4.5 V to 5.5 V supply voltage aligns with your system design. Ensure compliance with RoHS directives if applicable to your manufacturing standards. Review the absolute maximum ratings to prevent damage during operation.

Selection Notes

Select this component when an octal bus switch with standard '245 pinout compatibility is needed. It is suitable for applications requiring high-speed switching with low on-resistance. Consider the 4.5 V to 5.5 V operating voltage range and ensure it matches your power supply. Verify the package style (VSSOP20 or TSSOP20) fits your PCB layout constraints.

Part Context

This part belongs to the TC7MB series of CMOS digital integrated circuits. It is designed as a silicon monolithic device offering high performance in a compact surface-mount package. The series is intended for general-purpose bus switching applications where speed and low resistance are critical.

Replacement Considerations

The datasheet states the device is functionally equivalent to FST/CBT 3245 types. No specific substitute part numbers are listed in the provided documentation.

FAQ

What is the maximum propagation delay of the TC7MB3245?

The maximum propagation delay time (tpd) is 0.25 ns at a supply voltage of 4.5 V.

How does the OE pin control the switch?

When OE is low, the switch is on and Port A is connected to Port B. When OE is high, the switch is open, creating a high-impedance state between the two ports.

What is the typical on-resistance (RON) of the switch?

The typical on-resistance is 5 Ω at VCC = 5 V and Ta = 25°C.