ICM7555IPA Equivalent & Substitute Parts

Part Overview

The ICM7555IPA is a 555 Type Timer/Oscillator (Single) IC manufactured by Analog Devices Inc./Maxim Integrated, operating at 500kHz with an 8-PDIP package configuration. This component is classified as Obsolete, with 2774 pieces currently in stock. The ICM7555IPA operates across a supply voltage range of 2V to 16.5V and maintains a supply current of 30 µA, suitable for timing and oscillator applications in industrial and consumer electronics.

Due to the Obsolete product status of the ICM7555IPA, identifying equivalent and substitute parts is necessary for design continuity, long-term availability assurance, and compliance with current manufacturing standards. Substitute parts listed below maintain functional compatibility through shared electrical and mechanical parameters while offering Active product status and improved compliance certifications.

Key Parameters

Parameter	ICM7555IPA Value
Type	555 Type, Timer/Oscillator (Single)
Frequency	500kHz
Voltage - Supply	2V ~ 16.5V
Current - Supply	30 µA
Operating Temperature	-20°C ~ 85°C
Package / Case	8-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution compatibility for the ICM7555IPA is determined by the following critical parameters:

Package Compatibility: All substitute parts maintain the 8-DIP (0.300", 7.62mm) package with Through Hole mounting type, ensuring direct mechanical and electrical pin compatibility.

Functional Type: All substitutes are 555 Type Timer/Oscillator (Single) ICs, maintaining identical functional architecture and pinout.

Supply Voltage Range: Substitute parts must support the application's supply voltage requirements. The ICM7555IPA operates at 2V ~ 16.5V. Substitutes with overlapping or extended voltage ranges are compatible.

Operating Temperature Range: The ICM7555IPA operates from -20°C to 85°C. Substitutes with equal or extended temperature ranges maintain thermal compatibility.

Frequency and Current Specifications: While frequency and supply current vary among substitutes, these parameters do not prevent substitution when the application's timing requirements and power budget accommodate the substitute's specifications.

Compliance Status: Active product status and RoHS3 compliance are preferred for new designs and long-term availability.

Parameter Comparison

Part Number	Manufacturer	Frequency	Voltage - Supply	Current - Supply	Operating Temperature	Package / Case	Product Status	RoHS Status
ICM7555IPA	Analog Devices Inc./Maxim Integrated	500kHz	2V ~ 16.5V	30 µA	-20°C ~ 85°C	8-DIP (0.300", 7.62mm)	Obsolete	RoHS non-compliant
ICM7555IPA+	Analog Devices Inc./Maxim Integrated	500kHz	2V ~ 16.5V	30 µA	-20°C ~ 85°C	8-DIP (0.300", 7.62mm)	Active	ROHS3 Compliant
ICM7555IPAZ	Renesas Electronics Corporation	1MHz	2V ~ 18V	60 µA	-25°C ~ 85°C	8-DIP (0.300", 7.62mm)	Active	ROHS3 Compliant
TLC555IP	Texas Instruments	2.1MHz	3V ~ 15V	360 µA	-40°C ~ 85°C	8-DIP (0.300", 7.62mm)	Active	ROHS3 Compliant
TLC555CP	Texas Instruments	2.1MHz	2V ~ 15V	360 µA	0°C ~ 70°C	8-DIP (0.300", 7.62mm)	Active	ROHS3 Compliant
LMC555CN/NOPB	Texas Instruments	3MHz	1.5V ~ 15V	150 µA	-40°C ~ 85°C	8-DIP (0.300", 7.62mm)	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Replacement (Identical Electrical Specifications):

ICM7555IPA+ is the direct replacement for ICM7555IPA. Both parts operate at 500kHz with identical supply voltage (2V ~ 16.5V), supply current (30 µA), and operating temperature range (-20°C ~ 85°C). The primary distinction is product status and compliance: ICM7555IPA+ is Active and ROHS3 Compliant, whereas the original ICM7555IPA is Obsolete and RoHS non-compliant. ICM7555IPA+ is the preferred choice for design continuity and regulatory compliance.

Extended Voltage Range Substitute:

ICM7555IPAZ (Renesas Electronics Corporation) provides an extended supply voltage range of 2V ~ 18V compared to the original 2V ~ 16.5V, with an extended operating temperature range of -25°C ~ 85°C. The frequency increases to 1MHz and supply current to 60 µA. This part is suitable for applications requiring higher voltage tolerance and lower temperature operation. Product status is Active with ROHS3 compliance.

Higher Frequency Substitutes:

TLC555IP and TLC555CP (Texas Instruments, LinCMOS™ series) operate at 2.1MHz, providing higher frequency capability. TLC555IP supports -40°C ~ 85°C operating temperature with 3V ~ 15V supply voltage. TLC555CP operates at 0°C ~ 70°C with 2V ~ 15V supply voltage. Both are Active with ROHS3 compliance. These parts are suitable for applications where higher frequency operation is acceptable and the narrower voltage range is compatible.

Lowest Supply Voltage Substitute:

LMC555CN/NOPB (Texas Instruments) operates at the lowest minimum supply voltage of 1.5V, with maximum frequency of 3MHz. Operating temperature range extends to -40°C ~ 85°C. This part is suitable for low-voltage applications and extended temperature environments. Product status is Active with ROHS3 compliance.

Selection Criteria:

For direct replacement with improved compliance: Select ICM7555IPA+
For extended voltage operation: Select ICM7555IPAZ
For higher frequency applications: Select TLC555IP or TLC555CP based on temperature requirements
For lowest supply voltage: Select LMC555CN/NOPB

All substitutes maintain 8-DIP package compatibility and Through Hole mounting, ensuring mechanical interchangeability.

Frequently Asked Questions (FAQ)

Q: Can ICM7555IPA+ be used as a direct replacement for ICM7555IPA?

A: Yes. ICM7555IPA+ is electrically and mechanically identical to ICM7555IPA, with identical frequency (500kHz), supply voltage range (2V ~ 16.5V), supply current (30 µA), and operating temperature range (-20°C ~ 85°C). The primary differences are Active product status and ROHS3 compliance. ICM7555IPA+ is the recommended replacement.

Q: What are the key differences between ICM7555IPA and ICM7555IPAZ?

A: ICM7555IPAZ operates at 1MHz (versus 500kHz), has an extended supply voltage range of 2V ~ 18V (versus 2V ~ 16.5V), extended operating temperature range of -25°C ~ 85°C (versus -20°C ~ 85°C), and higher supply current of 60 µA (versus 30 µA). Both maintain 8-DIP package compatibility. ICM7555IPAZ is suitable for applications requiring higher frequency or extended voltage tolerance.

Q: Are TLC555IP and TLC555CP interchangeable?

A: Both TLC555IP and TLC555CP operate at 2.1MHz with 8-DIP packages. The primary difference is operating temperature range: TLC555IP operates at -40°C ~ 85°C with 3V ~ 15V supply voltage, while TLC555CP operates at 0°C ~ 70°C with 2V ~ 15V supply voltage. Selection depends on application temperature requirements and minimum supply voltage needs.

Q: What is the minimum supply voltage requirement for each substitute?

A: ICM7555IPA and ICM7555IPA+ require 2V minimum. ICM7555IPAZ requires 2V minimum. TLC555IP requires 3V minimum. TLC555CP requires 2V minimum. LMC555CN/NOPB requires 1.5V minimum. Applications with supply voltages below 2V must use LMC555CN/NOPB.

Q: Do all substitutes maintain the same package configuration?

A: Yes. All substitute parts use 8-DIP (0.300", 7.62mm) package with Through Hole mounting type, ensuring direct mechanical and electrical pin compatibility with ICM7555IPA.

Q: Which substitute offers the widest operating temperature range?

A: TLC555IP and LMC555CN/NOPB both offer -40°C ~ 85°C operating temperature range, which is wider than the original ICM7555IPA (-20°C ~ 85°C). ICM7555IPAZ offers -25°C ~ 85°C.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All substitute parts listed (ICM7555IPA+, ICM7555IPAZ, TLC555IP, TLC555CP, and LMC555CN/NOPB) are ROHS3 Compliant. The original ICM7555IPA is RoHS non-compliant.

Q: What is the maximum frequency capability among all substitutes?

A: LMC555CN/NOPB operates at the highest frequency of 3MHz, followed by TLC555IP and TLC555CP at 2.1MHz, ICM7555IPAZ at 1MHz, and ICM7555IPA/ICM7555IPA+ at 500kHz.

Q: Which substitute has the lowest supply current?

A: ICM7555IPA and ICM7555IPA+ have the lowest supply current at 30 µA. LMC555CN/NOPB has 150 µA, ICM7555IPAZ has 60 µA, and TLC555IP/TLC555CP have 360 µA.

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