ICM7555CBA-T Equivalent & Substitute Parts

Part Overview

The ICM7555CBA-T is a 555 Type Timer/Oscillator (Single) IC manufactured by Renesas Electronics Corporation, operating at 1MHz with an 8-SOIC surface mount package. This component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design requirements and production continuity. The part operates across a 2V to 18V supply voltage range with 60µA supply current and is rated for 0°C to 70°C operating temperature.

Key Parameters

Parameter	Value
Part Number	ICM7555CBA-T
Manufacturer	Renesas Electronics Corporation
Product Type	555 Type, Timer/Oscillator (Single)
Frequency	1MHz
Voltage - Supply	2V ~ 18V
Current - Supply	60µA
Operating Temperature	0°C ~ 70°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the ICM7555CBA-T is determined by strict adherence to the following electrical and mechanical parameters:

Critical Compatibility Parameters:

Package / Case: 8-SOIC (0.154", 3.90mm Width) — all substitutes must match this footprint
Mounting Type: Surface Mount — all substitutes must be surface mount compatible
Product Type: 555 Type, Timer/Oscillator (Single) — functional equivalence required
Voltage - Supply Range: Must encompass or be compatible with 2V ~ 18V operation
Operating Temperature: Must support 0°C ~ 70°C minimum range

Substitution Categories:

Direct Manufacturer Substitutes maintain identical electrical specifications and are sourced from the same or equivalent manufacturer lines. These include ICM7555CBAZ-T (active status, RoHS3 compliant) and TLC555CDR (Texas Instruments, active status).

Upgrade Substitutes offer enhanced specifications including extended temperature ranges, lower supply current, or improved RoHS compliance while maintaining 8-SOIC packaging and 555 timer functionality. These include ICM7555ESA+, ICM7555ESA+T, ICM7555ISA+, ICM7555ISA+T, LMC555CM/NOPB, and LMC555CMX/NOPB.

Similar Substitutes provide functional equivalence within the 555 timer category with compatible packaging but may have frequency or voltage variations. These include ALD1502SAL and ALD7555SAL from Advanced Linear Devices Inc.

Parameter Comparison

Part Number	Manufacturer	Frequency	Voltage - Supply	Current - Supply	Operating Temperature	Package / Case	Product Status	RoHS Status
ICM7555CBA-T	Renesas Electronics	1MHz	2V ~ 18V	60µA	0°C ~ 70°C	8-SOIC	Obsolete	RoHS non-compliant
ICM7555CBAZ-T	Renesas Electronics	1MHz	2V ~ 18V	60µA	0°C ~ 70°C	8-SOIC	Active	RoHS3 Compliant
TLC555CDR	Texas Instruments	2.1MHz	2V ~ 15V	360µA	0°C ~ 70°C	8-SOIC	Active	RoHS3 Compliant
ICM7555ESA+	Analog Devices Inc./Maxim Integrated	500kHz	2V ~ 16.5V	30µA	-40°C ~ 85°C	8-SOIC	Active	RoHS3 Compliant
ICM7555ESA+T	Analog Devices Inc./Maxim Integrated	500kHz	2V ~ 16.5V	30µA	-40°C ~ 85°C	8-SOIC	Active	RoHS3 Compliant
ICM7555ISA+	Analog Devices Inc./Maxim Integrated	500kHz	2V ~ 16.5V	30µA	-20°C ~ 85°C	8-SOIC	Active	RoHS3 Compliant
ICM7555ISA+T	Analog Devices Inc./Maxim Integrated	500kHz	2V ~ 16.5V	30µA	-20°C ~ 85°C	8-SOIC	Active	RoHS3 Compliant
LMC555CM/NOPB	Texas Instruments	3MHz	1.5V ~ 15V	150µA	-40°C ~ 85°C	8-SOIC	Last Time Buy	RoHS3 Compliant
LMC555CMX/NOPB	Texas Instruments	3MHz	1.5V ~ 15V	150µA	-40°C ~ 85°C	8-SOIC	Active	RoHS3 Compliant
ALD1502SAL	Advanced Linear Devices Inc.	2.5MHz	2V ~ 12V	50µA	0°C ~ 70°C	8-SOIC	Active	RoHS3 Compliant
ALD7555SAL	Advanced Linear Devices Inc.	2.5MHz	2V ~ 10V	50µA	0°C ~ 70°C	8-SOIC	Active	RoHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: ICM7555CBAZ-T

The ICM7555CBAZ-T is the direct functional equivalent with identical electrical specifications (1MHz, 2V ~ 18V, 60µA, 0°C ~ 70°C) and 8-SOIC packaging. This part is currently in active production status with RoHS3 compliance, addressing the obsolescence of the original ICM7555CBA-T. Inventory availability is substantial at 51,420 pieces.

Secondary Recommendation: LMC555CMX/NOPB

The LMC555CMX/NOPB offers upgrade characteristics including extended operating temperature range (-40°C ~ 85°C), RoHS3 compliance, and active product status. The 3MHz frequency capability exceeds the original 1MHz specification. This part is suitable for applications requiring enhanced temperature performance. Inventory is available at 31,756 pieces.

Alternative Recommendation: ICM7555ISA+T

The ICM7555ISA+T provides active status with RoHS3 compliance and extended temperature range (-20°C ~ 85°C). Supply current is reduced to 30µA compared to the original 60µA, offering improved power efficiency. Inventory availability is 21,959 pieces.

Compliance Consideration:

The original ICM7555CBA-T is RoHS non-compliant. All recommended substitutes are RoHS3 compliant, supporting modern regulatory requirements and supply chain standards.

Frequently Asked Questions (FAQ)

Q: Can ICM7555CBAZ-T directly replace ICM7555CBA-T?

A: Yes. The ICM7555CBAZ-T maintains identical electrical specifications (1MHz frequency, 2V ~ 18V supply voltage, 60µA supply current, 0°C ~ 70°C operating temperature) and 8-SOIC packaging. The primary difference is active product status and RoHS3 compliance versus the obsolete, non-compliant original part.

Q: What are the key differences between direct substitutes and upgrade substitutes?

A: Direct substitutes (ICM7555CBAZ-T, TLC555CDR) maintain the same frequency and electrical operating parameters as the original ICM7555CBA-T. Upgrade substitutes (ICM7555ESA+, ICM7555ISA+, LMC555CM/NOPB series) offer enhanced specifications such as extended temperature ranges, reduced supply current, or higher frequency capability while maintaining 8-SOIC packaging and 555 timer functionality.

Q: Are all substitute parts compatible with the original 8-SOIC footprint?

A: Yes. All listed substitute parts use the 8-SOIC (0.154", 3.90mm Width) package, ensuring mechanical and electrical compatibility with existing PCB layouts designed for the ICM7555CBA-T.

Q: What is the impact of frequency differences in substitute parts?

A: Frequency differences (500kHz to 3MHz across substitutes) affect timing circuit behavior. Applications requiring precise 1MHz operation should select ICM7555CBAZ-T or TLC555CDR (2.1MHz). Applications with flexible frequency requirements may utilize higher-frequency alternatives such as LMC555CMX/NOPB (3MHz) or lower-frequency options such as ICM7555ESA+ (500kHz).

Q: Which substitute offers the lowest power consumption?

A: ICM7555ESA+ and ICM7555ISA+ series offer the lowest supply current at 30µA, compared to 60µA for the original ICM7555CBA-T. This represents a 50% reduction in supply current consumption.

Q: Are there supply voltage compatibility concerns with substitute parts?

A: The original ICM7555CBA-T operates across 2V ~ 18V. Most substitutes maintain this range or exceed it. TLC555CDR operates at 2V ~ 15V (reduced upper limit), and ALD7555SAL operates at 2V ~ 10V (reduced upper limit). Verify supply voltage requirements for your specific application before selection.

Q: What is the significance of RoHS3 compliance in substitute selection?

A: RoHS3 compliance indicates conformance to current environmental and regulatory standards for electronic components. The original ICM7555CBA-T is RoHS non-compliant. All recommended substitutes are RoHS3 compliant, supporting modern procurement standards and regulatory requirements.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message