The TC7SH125FS is a single bus buffer gate with a 3-state output from Toshiba Semiconductor and Storage. It's part of their Tiny Logic series, designed for space-constrained applications requiring minimal power consumption and high-speed operation. This buffer provides non-inverting buffering, allowing signals to pass through unchanged when enabled, and presenting a high-impedance output when disabled.

Applications

• Signal buffering in digital circuits
• Line driving and isolation
• Memory address decoding
• Data bus isolation
• Level shifting

Features

• Single buffer gate
• 3-state output control
• High-speed operation: tpd = 3.8 ns (typ.) at VCC = 5 V
• Low power consumption: ICC = 1 μA (max) at Ta = 25 °C
• Operating voltage: VCC = 2 V to 5.5 V
• Output drive capability: ±8 mA (min) at VCC = 3 V
• Small package: FS5 (SOT-25 equivalent)
• ESD protection: Machine Model = 200 V, Human Body Model = 2000 V

Benefits

• Signal Integrity: Buffers signals to improve signal strength and reduce noise, improving overall system reliability.
• Isolation: 3-state output allows for isolating sections of a circuit, preventing loading effects.
• High-speed: Fast propagation delay allows it to keep up with high frequency signals.
• Low power: Tiny current consumption makes it suitable for battery-powered applications.
• Flexible Operation: Wide operating voltage makes it compatible with many different voltage levels
• Space-saving: The ultra-small FS5 package significantly reduces the PCB real estate required.
• ESD protection: Enhances device reliability and prevents damage from electrostatic discharge.

Additional Details

The TC7SH125FS operates as a simple buffer when the Output Enable (OE) input is low. The signal applied to the input (A) is passed directly to the output (Y) without inversion. When OE is high, the output is placed in a high-impedance state, effectively disconnecting the buffer from the output line. This 3-state functionality is particularly useful for implementing shared bus architectures or for disabling sections of a circuit to reduce power consumption. The device's small FS5 package allows for high-density board layouts, making it ideal for portable and handheld devices. The low power consumption contributes to extended battery life in these applications. Furthermore, the buffer gate's fast propagation delay ensures minimal impact on signal timing, preserving overall system performance. The input is equipped with protection circuits against static discharge, further enhancing its reliability.