LM293PT

Overview

The LM293PT is a low-power dual voltage comparator manufactured by STMicroelectronics, housed in an 8-pin TSSOP surface-mount package. It features two independent comparators designed for single-supply operation across a wide voltage range of 2V to 36V, or split supplies from ±1V to ±18V. Key electrical parameters include a maximum static current of 2.5mA, an output current capability of 18mA, and an input bias current of 250nA. The device supports TTL, DTL, ECL, MOS, and CMOS compatible outputs with an open-collector configuration. It operates within a temperature range of -40°C to +105°C.

Feature Summary

• Dual independent comparators optimized for single-supply operation over a wide voltage range
• Input common-mode voltage range includes ground potential even when powered by a single supply
• Outputs are compatible with various logic families including TTL, DTL, ECL, MOS, and CMOS
• Low power consumption characteristics independent of the supply voltage level

Applications

• Signal conditioning circuits requiring precise voltage threshold detection
• Window comparator configurations for monitoring signal levels within defined bounds
• Logic interface circuits converting analog signals to digital logic levels
• Temperature sensing systems utilizing thermistor-based voltage dividers

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official datasheet to confirm pinout compatibility and package dimensions. Ensure the component grade matches the required operating temperature range for your application environment. Cross-reference the part number with authorized distributors to confirm authenticity and traceability documentation availability before finalizing procurement decisions.

Selection Notes

Select this component when designing circuits that require dual comparison functions with minimal power dissipation. It is suitable for applications where the input signal can reach ground potential while using a single positive supply rail. Consider the open-collector output requirement for external pull-up resistors when interfacing with different logic voltage levels. Evaluate the propagation delay specifications if high-speed switching performance is critical for the system timing requirements.

Part Context

This device belongs to the LM193/LM293/LM393 family of low-power dual voltage comparators. These components share similar functional architectures but may differ in temperature ranges, offset voltage specifications, and packaging options. The LM293PT specifically denotes the industrial temperature grade variant in a TSSOP-8 package, distinguishing it from commercial or military grade equivalents within the same product line.

Replacement Considerations

LM393PT: Industrial grade equivalent with potentially improved offset voltage specifications. LM293DR: Alternative TSSOP-8 package option from the same manufacturer. LM293N: PDIP-8 through-hole package alternative for legacy board designs.