ICM7555IPA-2 Equivalent & Substitute Parts

Part Overview

The ICM7555IPA-2 is a 555 Type Timer/Oscillator (Single) IC manufactured by Analog Devices Inc./Maxim Integrated, rated for 500kHz operation in an 8-PDIP package. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The ICM7555IPA-2 operates across a 2V to 18V supply range with 30µA supply current and supports operating temperatures from -20°C to 85°C. Finding suitable alternatives ensures design continuity and component availability.

Substiute Parts

ICM7555IPA-2

Analog Devices Inc./Maxim IntegratedIn Stock: 1006ICM7555IPA-2 Datasheet

Current PartRFQ

ICM7555IPAZ

Renesas Electronics CorporationIn Stock: 28143ICM7555IPAZ Datasheet

DirectRFQ

LMC555CN/NOPB

Texas InstrumentsIn Stock: 3101LMC555CN/NOPB Datasheet

MFR RecommendedRFQ

TLC555CP

Texas InstrumentsIn Stock: 20432TLC555CP Datasheet

MFR RecommendedRFQ

TLC555IP

Texas InstrumentsIn Stock: 18103TLC555IP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ICM7555IPA-2 are qualified based on the following criteria:

Package Compatibility: All substitute parts must use the 8-DIP (0.300", 7.62mm) / 8-PDIP package with through-hole mounting to ensure direct PCB compatibility.

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

Voltage Supply Range: Substitute parts must support the original 2V minimum supply voltage or lower, and 15V or higher maximum supply voltage to ensure operation within the original design envelope.

Operating Temperature Range: Substitute parts must cover the original -20°C to 85°C range or extend it to ensure thermal compatibility.

Frequency Rating: While the ICM7555IPA-2 is rated for 500kHz, substitute parts with higher frequency ratings (1MHz, 2.1MHz, 3MHz) remain functionally compatible in 555-type timer applications, as frequency rating represents maximum operating capability rather than a fixed operating point.

The following parts meet these substitution criteria:

• ICM7555IPAZ (Renesas Electronics Corporation) - Direct functional equivalent with 1MHz rating
• LMC555CN/NOPB (Texas Instruments) - MFR recommended substitute with 3MHz rating and extended temperature range
• TLC555CP (Texas Instruments) - MFR recommended substitute with 2.1MHz rating
• TLC555IP (Texas Instruments) - MFR recommended substitute with 2.1MHz rating and extended temperature range

Parameter Comparison

Engineering Selection Recommendations

For Active Production and New Designs:

The ICM7555IPAZ, LMC555CN/NOPB, TLC555CP, and TLC555IP are all active products with ROHS3 compliance, making them suitable for new designs and ongoing production. The ICM7555IPA-2 is obsolete and should be replaced in active designs.

For Designs Requiring Extended Temperature Range:

The LMC555CN/NOPB and TLC555IP both support -40°C to 85°C operating temperature, exceeding the original -20°C to 85°C range of the ICM7555IPA-2. These parts are preferred when extended low-temperature operation is required.

For Designs with Voltage Supply Constraints:

The ICM7555IPAZ maintains the full 2V to 18V supply range of the original part. The LMC555CN/NOPB extends the lower limit to 1.5V. The TLC555CP and TLC555IP have reduced maximum supply voltages (15V) compared to the original 18V specification.

For Low Supply Current Applications:

The ICM7555IPAZ (60µA) has the lowest supply current among active substitutes, closest to the original 30µA specification. The LMC555CN/NOPB and TLC555 series have higher supply currents (150µA to 360µA) and should be evaluated for power-sensitive applications.

For Temperature-Constrained Environments:

The TLC555CP has a reduced operating temperature range (0°C to 70°C) and is not recommended for applications requiring the full -20°C to 85°C range of the original part.

Frequently Asked Questions (FAQ)

Q: Can I directly replace ICM7555IPA-2 with any of these substitute parts?

A: Yes, all listed substitute parts are pin-compatible 555 Type Timer/Oscillator ICs in the same 8-DIP package. However, verify that your circuit design accommodates the differences in supply current, frequency rating, and operating temperature range before substitution.

Q: What is the main difference between ICM7555IPAZ and the TLC555 series?

A: The ICM7555IPAZ maintains closer electrical specifications to the original ICM7555IPA-2, including the 2V to 18V supply range and lower supply current (60µA). The TLC555 series (TLC555CP and TLC555IP) are LinCMOS™ variants with higher frequency ratings (2.1MHz) and higher supply current (360µA), suitable for applications requiring higher operating frequencies.

Q: Does the higher frequency rating of substitute parts affect my circuit?

A: No. The frequency rating indicates the maximum operating capability of the device. A 555 timer configured for 500kHz operation will function identically whether using a 500kHz-rated or 3MHz-rated part, provided all other electrical parameters are within specification.

Q: Which substitute part should I use for new designs?

A: For new designs, select from the active products: ICM7555IPAZ, LMC555CN/NOPB, TLC555CP, or TLC555IP. All are ROHS3 compliant. Choose based on your specific requirements for supply voltage range, operating temperature, and supply current constraints.

Q: Are there any RoHS compliance considerations?

A: The original ICM7555IPA-2 is RoHS non-compliant. All substitute parts (ICM7555IPAZ, LMC555CN/NOPB, TLC555CP, TLC555IP) are ROHS3 compliant, making them suitable for applications with RoHS requirements.

Q: Can I use TLC555CP in applications requiring -20°C operation?

A: No. The TLC555CP has a minimum operating temperature of 0°C. For applications requiring -20°C operation, use ICM7555IPAZ, LMC555CN/NOPB, or TLC555IP instead.

Q: What is the impact of higher supply current in substitute parts?

A: Higher supply current (60µA to 360µA compared to 30µA) increases power consumption. For battery-powered or power-sensitive applications, the ICM7555IPAZ is preferred due to its lower supply current specification.