STMicroelectronics LM258DT

Overview

LM258DT from STMicroelectronics is a low-power dual operational amplifier designed for single-supply operation across 3 V to 30 V, featuring 1.1 MHz unity-gain bandwidth, 100 dB large-signal voltage gain, and rail-to-rail input common-mode range including negative rail. It delivers 2 mV max input offset voltage, 20 nA typical input bias current, and supports industrial temperature range (−40 °C to +105 °C), making it suitable for transducer signal conditioning in programmable logic controllers.

For engineers reviewing the LM258DT datasheet, LM258DT pinout, LM258DT application, or LM258DT equivalent, this page provides verified pin functions, real-world use cases in sensor interfaces and DC gain blocks, confirmed alternative parts with documented electrical and thermal differences, and supply-chain support for volume procurement and BOM continuity.

Technical Context

The LM258DT integrates two independent, internally frequency-compensated op amps optimized for single-supply systems. Its input stage uses PNP transistors enabling common-mode voltage down to the negative rail, while output swing reaches within 1.5 V of VCC+ and to ground under load.

It operates with supply current as low as 0.7 mA per amplifier at 5 V and remains stable driving capacitive loads up to 290 pF, with phase margin maintained above 10° across full operating temperature. Input offset drift is specified at 7–15 µV/°C for the A-grade variant, though LM258DT itself is standard grade.

Key Specifications

Pinout & Package

LM258DT is supplied in an SO8 (Small Outline Integrated Circuit, 8-pin) package with standard 1.27 mm pitch, 4.9 mm width, and ECOPACK® RoHS-compliant finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual op amp applications.

Compared with LM258ADT, LM258DT trades offset precision for broader industrial qualification; compared with LM358DT, it adds −40 °C start-up capability critical for outdoor automation, while maintaining identical SO8 footprint and pinout.

Availability

LM258DT is available at Aetrix Electronics and suitable for industrial control systems, sensor signal conditioning, and programmable logic controller (PLC) I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LM258DT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.

The LM258 series belongs to ST's general-purpose operational amplifier product line, engineered specifically for robust, low-cost signal conditioning in single-supply industrial and automation equipment.

FAQ

Is LM258DT pin-compatible with LM358DT?

Yes, LM258DT and LM358DT share identical SO8 pinout, electrical architecture, and functional behavior. The key distinction lies in temperature rating: LM258DT operates from −40 °C to +105 °C, while LM358DT is rated only from 0 °C to +70 °C. Both exhibit the same 5 mV max input offset voltage and 1.1 MHz bandwidth at 25 °C.

Can LM258DT drive a 10 kΩ load to rail in single-supply mode?

Yes - with VCC+ = 5 V and RL = 10 kΩ to ground, LM258DT achieves a minimum low-level output voltage (VOL) of 20 mV and high-level output (VOH) of 3.5 V, delivering usable 3.48 V swing. Output current capability (20–40 mA source, 10–20 mA sink) ensures stable performance into 10 kΩ loads without significant droop or distortion.

What is the maximum capacitive load LM258DT can drive without oscillation?

LM258DT maintains stability with capacitive loads up to 290 pF, as verified by phase margin ≥10° across −40 °C to +105 °C per Figure 18 in the official datasheet. For loads exceeding 100 pF, ST recommends adding a 10–100 Ω series resistor between output and capacitor to isolate reactive feedback and preserve loop stability.

Does LM258DT require external frequency compensation?

No - LM258DT features internal frequency compensation, eliminating the need for external capacitors or resistors. This simplifies layout, reduces bill-of-materials count, and guarantees unity-gain stability across its full 3–30 V supply range and operating temperature span, as confirmed in Section 1 (Schematic diagram) and Feature list of the ST datasheet.