STMicroelectronics LM258AWYST

Overview

LM258AWYST from STMicroelectronics is a low-power dual operational amplifier in TSSOP8 package, designed for single-supply operation from 3 V to 30 V, featuring 1.1 MHz unity-gain bandwidth, 100 dB large-signal voltage gain, and rail-to-rail output swing (0 V to V_CC − 1.5 V). It delivers 20 nA input bias current, 2 mV input offset voltage, and 2 kV HBM ESD protection - enabling use in battery-powered sensor signal conditioning and industrial interface circuits.

For engineers reviewing the LM258AWYST datasheet, LM258AWYST pinout, LM258AWYST application, or LM258AWYST equivalent, key selection considerations include its −40 °C to +105 °C automotive-grade temperature range, TSSOP8 footprint compatibility with space-constrained PCBs, input common-mode range extending to ground, and guaranteed performance under single +5 V logic-compatible supply.

Technical Context

The LM258AWYST integrates two independent high-gain op-amps with internal frequency compensation, enabling stable unity-gain operation without external components. Its PNP input stage allows input voltages down to ground and supports differential input ranges equal to the full supply voltage.

It operates linearly with input common-mode voltage from −0.3 V to V_CC − 1.5 V and delivers output swing from 0 V to V_CC − 1.5 V into 2 kΩ loads. Supply current remains stable at 0.7–1.2 mA across 5 V to 30 V supply, with thermal resistance R_thJA = 120 °C/W in TSSOP8.

Key Specifications

Pinout & Package

TSSOP8 (Thin Shrink Small Outline Package), 8-pin, surface-mount, lead-free, RoHS-compliant, with 0.65 mm pitch and 3.0 mm × 4.4 mm body size.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM2904WDT and MCP6022-E/SN, the LM258AWYST uniquely balances AEC-Q100 Grade 2 qualification, 1.1 MHz bandwidth, and proven single-supply input stage reliability - making it optimal for cost-sensitive automotive cabin electronics and industrial sensor nodes requiring guaranteed operation up to +105 °C.

Availability

LM258AWYST is available at Aetrix Electronics and suitable for automotive cabin electronics, industrial 4–20 mA transmitters, portable medical devices, and temperature monitoring systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LM258AWYST 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 microcontrollers, analog ICs, power management devices, and MEMS sensors for industrial, automotive, and consumer markets.

The LMx58W series belongs to ST's precision analog portfolio, engineered specifically for robust, low-cost dual op-amp functionality in single-supply industrial and automotive systems - emphasizing reliability, wide temperature operation, and ease of integration.

FAQ

Is LM258AWYST pin-compatible with standard LM258 variants?

Yes - LM258AWYST uses the industry-standard TSSOP8 pinout matching LM258WPT and LM2904WPT. Pin 1 is Output 1, Pin 2 is Inverting Input 1, Pin 3 is Non-inverting Input 1, Pin 4 is GND, Pin 5 is Non-inverting Input 2, Pin 6 is Inverting Input 2, Pin 7 is Output 2, and Pin 8 is V_CC+. No adapter or layout change is needed when upgrading from non-automotive TSSOP8 versions.

What is the maximum capacitive load the LM258AWYST can drive stably?

The LM258AWYST maintains phase margin ≥45° with up to 100 pF capacitive load at unity gain, as verified in Figure 17 of the datasheet. For loads >100 pF, a 10 Ω to 47 Ω series resistor between output and capacitor restores stability. This behavior is consistent across −40 °C to +105 °C and all supply voltages from 3 V to 30 V.

Does LM258AWYST support rail-to-rail input operation?

No - LM258AWYST features a PNP input stage allowing input common-mode voltage down to ground (0 V), but the upper limit is V_CC − 1.5 V. It does not support rail-to-rail input (i.e., inputs cannot reach V_CC+). However, this architecture enables true single-supply operation with ground-referenced inputs and outputs, unlike CMOS rail-to-rail input op-amps that require higher supply headroom for biasing.

Can LM258AWYST be used as a comparator?

It is not recommended. While the LM258AWYST can function open-loop as a comparator, its internal compensation network causes slow response (>1 µs propagation delay) and potential phase reversal if inputs exceed common-mode range. Dedicated comparators like TS882IDCNT offer faster switching, built-in hysteresis, and guaranteed output logic levels - making them superior for threshold detection tasks.