TS374CD
TS374CD - Low-Power Quad CMOS Comparator | STMicroelectronics
The STMicroelectronics TS374CD is a low-power quad differential CMOS voltage comparator containing four independent precision comparator channels in a 14-pin SOIC package. The device supports single- or dual-supply operation, provides open-drain outputs compatible with CMOS, MOS, and TTL logic, and combines a typical response time of 200 ns with very low power consumption. Its four-channel arrangement allows one package to implement four independent sensing or threshold functions.
A voltage comparator is an analog semiconductor that compares two input voltages and changes its output state when the difference crosses a defined threshold. The TS374CD belongs to the comparator hierarchy within analog and interface ICs. Each channel has differential inputs, high input impedance, and an open-drain output that can pull a logic node low. When used with a pull-up resistor, the open-drain architecture supports wired logic, level translation, and direct interfacing with multiple open-drain devices.
The principal device characteristics include four independent channels, a typical input impedance of 10^12 ohms, a typical input bias current of 1 pA at 5 V, and a maximum quiescent current of 250 microamperes. The fast typical response time of 200 ns is useful for signal crossing, threshold detection, and control-loop applications where the comparator must react quickly after an input differential changes polarity. Open-drain outputs provide flexible system integration without driving the output high actively.
The TS374CD uses four independent precision voltage comparators implemented with STMicroelectronics silicon linear MOS technology. This process is intended to provide a favorable balance between consumption and operating speed. The very high input impedance reduces loading on the signals being measured, while the low typical bias current is beneficial when the comparator monitors high-impedance sensors or threshold networks. Because the output is open drain, its rising voltage is established by an external pull-up resistor rather than an internal active pull-up.
Typical applications include sensor-threshold detection, overvoltage and undervoltage monitoring, window comparison, zero-cross detection, industrial control logic, and general-purpose analog signal conditioning. Four channels can also be used as independent comparator elements in a compact design, reducing package count compared with discrete or single-channel implementations. A pull-up resistor should be selected according to the target logic family, bus capacitance, and required rise time.
When designing with the TS374CD, account for open-drain behavior and provide a suitable pull-up on every output used by downstream logic. Review input common-mode limits, supply range, output sink current, and propagation timing in the manufacturer datasheet before setting thresholds. Because this ordering code is listed as obsolete, confirm lifecycle status and obtain an approved replacement or a supported availability plan before beginning a new production design.
This product page organizes the TS374CD’s comparator architecture, electrical characteristics, practical applications, verified equivalent information, and design considerations. It also highlights the lifecycle constraint and distinguishes a documented cross-brand alternative from components that may use the same 14-pin footprint but differ in output behavior, supply limits, or logic compatibility.
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