NTE922
NTE922 Low-Input-Current Voltage Comparator | NTE Electronics
The NTE Electronics NTE922 is a low-input-current voltage comparator supporting supply operation from single 5 V logic supplies through standard plus-or-minus 15 V analog supplies. It is offered in an eight-pin metal-can package and provides open-collector transistor outputs. According to the NTE922 datasheet, its input currents are nearly one thousand times lower than those of the NTE910 and NTE910D comparators, making it useful when sensing or switching nodes has a high source impedance.
A voltage comparator is an integrated circuit that compares two input voltages and produces a digital logic state indicating which input is higher. Within the semiconductor hierarchy, the NTE922 is a comparator, then a logic IC and an analog interface device. Unlike an operational amplifier configured as a comparator, this device is intended specifically for threshold decision-making rather than linear signal amplification. Its open-collector outputs allow wired logic and pull-up resistors to be used in many interface circuits.
The principal verified feature is extremely low input current, nearly one thousand times lower than the NTE910 or NTE910D. This characteristic helps minimize loading on high-impedance sources, reference dividers, sensor outputs, and charge-balanced detection networks. The wider supply range lets the same comparator family support conventional plus-or-minus 15 V analog systems and 5 V digital logic systems, although each exact electrical limit must be confirmed from the manufacturer datasheet before a production design is released.
NTE922, NTE922M, and NTE922SM are three package variants of the same comparator family. The supplied evidence identifies NTE922 as the eight-pin metal-can version, while NTE922M and NTE922SM are associated with different mounting packages. The wider supply range lets the same comparator family support conventional plus-or-minus 15 V analog systems and 5 V digital logic systems, although each exact electrical limit must be confirmed from the manufacturer datasheet before a production design is released.
Typical uses include high-impedance threshold detection, low-current sensing, pulse and timing systems, interface logic, legacy industrial equipment, and repair or modernization of circuits originally designed around NTE comparators. Because the output is open collector, designers must include suitable pull-up resistors and account for the output's sink-current and switching limitations when setting fanout or load capacitance.
A critical design check is the input common-mode range. A wide supply-voltage rating does not guarantee that both inputs remain within their linear operating region near the supply rails. Prototype the divider and test both threshold polarities while observing output polarity. Also route the high-impedance input node with short traces, guard it where practical, and keep leakage from board contamination and flux from creating false transitions.
This page combines verified family-level data, packaging distinctions, replacement constraints, and application guidance. Exact electrical values not present in the supplied evidence remain flagged rather than guessed, and any replacement must be checked for package pins, output topology, supply range, input bias current, common-mode range, and timing before it is treated as a drop-in part.
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