MC10H175PG

Logic - Latches:

The MC10H175PG is a logic latch in the form of an integrated circuit. It was developed by Motorola in the 1970s under their 10H family of integrated circuits. It is a monolithic equivalent of their MC14175 once popular in audio applications. The MC10H175PG operates as a dual 4-bit latch, it is a exceptionally wide under voltage lockout circuit, capable of being toggled by external pulses.

Application Field:

The MC10H175PG was designed for interfacing slow-speed, low voltage signals from chips such as ROMs and CPUs. Frequently used in digital systems like counters, receivers and audio circuits, they are also known as level-triggered flip-flops. Other usages include digital circuits, voltage regulators, and time-delay circuits.

Working Principle:

The MC10H175PG consists of four NAND gates, four inverters and a voltage clamp diode. When a positive input pulse is applied to the latch, the inverter’s output is activated, which energizes the latch step by step. Once the latch reaches its final configuration, no further input pulses are necessary to maintain the latch in its stable state.

The integrated circuit has four inputs and four outputs, the inputs being A, B, ‘D’ and ‘R’. The ‘A’ and ‘B’ inputs are used to set the latched signals; when a positive input pulses is applied, the output at ‘A’ and ‘B’ respectively changes states (from low to high). The ‘D’ and ‘R’ inputs receive logic level signals internally generated by the integrated circuit. The positive input pulses cause the logic level signals at ‘D’ and ‘R’ to be active and the latched signals at ‘A’ and ‘B’ to switch their states respectively.

Moreover, the voltage clamp diode protects the circuitry when the circuit undergoes an over voltage situation and potentially damaging input pulses cannot be applied to the integrated circuit. In every condition, it is necessary that the clamped voltage never exceeds the upper limit of the gate threshold voltage.

The MC10H175PG is highly recommended for its wide operating range, low noise under voltage lockout conditions, and excellent temperature stability –allowing applications in extreme environments.