ICM7555ESA Equivalent & Substitute Parts

Part Overview

The ICM7555ESA is a 555 Type Timer/Oscillator (Single) IC manufactured by Analog Devices Inc./Maxim Integrated, designed for clock and timing applications. Operating at 500kHz with a supply voltage range of 2V to 16.5V, this component is packaged in an 8-SOIC surface mount configuration. The ICM7555ESA is classified as Obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity.

Substiute Parts

ICM7555ESA

Analog Devices Inc./Maxim IntegratedIn Stock: 21225ICM7555ESA Datasheet

Current PartRFQ

ICM7555ESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 2737ICM7555ESA+ Datasheet

DirectRFQ

TLC555ID

Texas InstrumentsIn Stock: 30246TLC555ID Datasheet

DirectRFQ

ALD7555SAL

Advanced Linear Devices Inc.In Stock: 1240ALD7555SAL Datasheet

MFR RecommendedRFQ

LMC555IM/NOPB

Texas InstrumentsIn Stock: 40882LMC555IM/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ICM7555ESA is determined by the following critical parameters:

Package Compatibility: All substitute parts must use the 8-SOIC (0.154", 3.90mm Width) surface mount package to ensure PCB footprint compatibility.

Functional Type: All substitutes must be 555 Type Timer/Oscillator (Single) ICs to maintain functional equivalence in timing and oscillator circuit applications.

Voltage Supply Range: Substitute parts must support the application's required supply voltage. The ICM7555ESA operates from 2V to 16.5V; substitutes with overlapping or extended voltage ranges are acceptable.

Operating Temperature Range: Substitute parts must cover the required operating temperature window. The ICM7555ESA operates from -40°C to 85°C.

Compliance Standards: All substitutes must maintain ROHS3 compliance and MSL 1 rating for manufacturing and environmental requirements.

Frequency Capability: While the ICM7555ESA operates at 500kHz, substitute parts with higher maximum frequency ratings remain functionally compatible for lower-frequency applications.

Parameter Comparison

Engineering Selection Recommendations

ICM7555ESA+ (Direct Equivalent): This part is the direct successor to the ICM7555ESA, maintaining identical electrical specifications and package configuration. With Active product status and full ROHS3 compliance, ICM7555ESA+ is the primary replacement for obsolete ICM7555ESA applications. This substitution requires no circuit modifications.

LMC555IM/NOPB (Extended Temperature Range): This Texas Instruments part offers an extended operating temperature range (-40°C to 125°C) compared to the ICM7555ESA (-40°C to 85°C), providing additional thermal margin for demanding applications. The LMC555IM/NOPB supports a lower minimum supply voltage (1.5V) and maintains full ROHS3 compliance. Higher supply current (150 µA) must be considered in power-constrained designs.

TLC555ID (High-Frequency Capability): This Texas Instruments LinCMOS™ series part operates at 2.1MHz, providing higher frequency capability than the ICM7555ESA. The TLC555ID maintains the required 8-SOIC package and ROHS3 compliance. Supply voltage range is 3V to 15V, which may limit use in applications requiring 2V minimum operation. Higher supply current (360 µA) is a consideration for battery-powered designs.

ALD7555SAL (Low-Power Alternative): This Advanced Linear Devices part offers the lowest supply current (50 µA) among substitutes, making it suitable for power-sensitive applications. However, the operating temperature range (0°C to 70°C) is narrower than the ICM7555ESA, and the maximum supply voltage is limited to 10V. This part is suitable only for applications within these thermal and voltage constraints.

Frequently Asked Questions (FAQ)

Q: Can I directly replace ICM7555ESA with ICM7555ESA+ without circuit modifications?

A: Yes. The ICM7555ESA+ is a direct equivalent with identical electrical specifications, supply voltage range, frequency, and operating temperature range. No circuit modifications are required. The primary difference is product status: ICM7555ESA+ is Active while ICM7555ESA is Obsolete.

Q: What is the key difference between ICM7555ESA and LMC555IM/NOPB?

A: The LMC555IM/NOPB offers an extended operating temperature range (-40°C to 125°C versus -40°C to 85°C) and lower minimum supply voltage (1.5V versus 2V). However, it draws higher supply current (150 µA versus 30 µA). Both maintain the 8-SOIC package and ROHS3 compliance.

Q: Is TLC555ID suitable for all ICM7555ESA applications?

A: The TLC555ID is functionally compatible for timing and oscillator applications but has a narrower supply voltage range (3V to 15V versus 2V to 16.5V). Applications requiring 2V operation cannot use TLC555ID. Additionally, higher supply current (360 µA) may impact power budgets in battery-powered designs.

Q: Why does ALD7555SAL have a narrower operating temperature range?

A: The ALD7555SAL is specified for 0°C to 70°C operation, which is narrower than the ICM7555ESA (-40°C to 85°C). This part is suitable only for applications operating within this temperature window. Applications requiring -40°C operation or temperatures above 70°C must use alternative substitutes.

Q: Are all substitute parts in the same 8-SOIC package?

A: Yes. All substitute parts listed use the 8-SOIC (0.154", 3.90mm Width) surface mount package, ensuring PCB footprint compatibility with the ICM7555ESA.

Q: Do all substitutes maintain ROHS3 compliance?

A: Yes. All substitute parts listed are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the compliance profile of the ICM7555ESA.