TC7MBL3257CFK(EL)

Overview

The TC7MBL3257CFK is a low-voltage, low-capacitance CMOS digital integrated circuit functioning as a 4-bit 1-of-2 multiplexer/demultiplexer. It operates within a supply voltage range of 1.65 V to 3.6 V and supports an operating temperature range from -40 °C to +85 °C. The device features four independent switching circuits with common select (S) and output enable (OE) inputs. Key electrical parameters include a typical ON-resistance of 8.5 Ω at 3.0 V and a typical ON capacitance of 8 pF. Maximum propagation delay times are specified up to 11 ns depending on the supply voltage.

Feature Summary

• Provides four individual two-input multiplexer/demultiplexer channels sharing common control signals for efficient signal routing.
• Incorporates power-down protection circuits on all input pins to prevent leakage current during power-off states.
• Features low ON-resistance and low ON-capacitance characteristics to minimize propagation delay and signal distortion.
• Includes built-in electrostatic discharge protection circuits on all inputs to enhance component reliability.

Applications

• Low-voltage data bus switching applications
• Signal path selection in portable electronic devices
• Multiplexing and demultiplexing functions in communication systems

Procurement Notes

Verify the specific ordering suffix and package variant against the manufacturer's official documentation before procurement. Confirm that the selected part number matches the required pin configuration and marking code. Ensure compliance with RoHS directives and environmental regulations applicable to your region. Review the absolute maximum ratings and derating guidelines to guarantee long-term operational reliability under intended load conditions.

Selection Notes

Select this component when designing circuits requiring low-voltage operation between 1.65 V and 3.6 V. Consider the 8.5 Ω typical ON-resistance and 8 pF ON-capacitance for high-speed signal integrity requirements. Evaluate the 16-pin VSSOP package dimensions for PCB layout constraints. Ensure the application does not exceed the specified operating temperature range of -40 °C to +85 °C.

Part Context

This device belongs to the TC7MBL series of CMOS digital logic ICs manufactured by Toshiba Semiconductor and Storage. It is designed for low-power, low-voltage applications where minimal signal degradation is critical. The component utilizes silicon monolithic technology and is housed in a compact surface-mount package suitable for space-constrained designs.

Replacement Considerations

Consult the official Toshiba datasheet for verified substitute part numbers or compatible alternatives within the same product family. Cross-reference pinouts and electrical specifications to ensure functional equivalence. Verify package compatibility and thermal performance before implementing any replacement.

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 state, placing the outputs in a high-impedance state.

What is the function of the Select (S) input?

The Select input determines which input port (B1 or B2) is connected to the A port. A low level connects A to B1, while a high level connects A to B2.

Does the device support power-down protection?

Yes, the TC7MBL3257CFK includes power-down protection for all inputs, including OE, S, and I/O, to prevent excessive leakage current when the device is powered off.