ICM7556IPD Equivalent & Substitute Parts

Part Overview

The ICM7556IPD is a dual timer/oscillator IC manufactured by Analog Devices Inc./Maxim Integrated, operating at 500kHz with a 14-DIP package. This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design requirements and production continuity. Substitute parts must maintain compatibility across electrical specifications, mechanical packaging, and operational parameters to ensure seamless integration into existing circuit designs.

Substiute Parts

ICM7556IPD

Analog Devices Inc./Maxim IntegratedIn Stock: 16326ICM7556IPD Datasheet

Current PartRFQ

ICM7556IPD+

Analog Devices Inc./Maxim IntegratedIn Stock: 1358ICM7556IPD+ Datasheet

DirectRFQ

ICM7556IPDZ

Renesas Electronics CorporationIn Stock: 3634ICM7556IPDZ Datasheet

UpgradeRFQ

TLC552CN

Texas InstrumentsIn Stock: 2398TLC552CN Datasheet

MFR RecommendedRFQ

TLC556CN

Texas InstrumentsIn Stock: 2151TLC556CN Datasheet

MFR RecommendedRFQ

TLC556IN

Texas InstrumentsIn Stock: 2159TLC556IN Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters: package type (14-DIP), mounting method (Through Hole), supply voltage range compatibility, operating temperature range, and functional classification (555 Type, Timer/Oscillator Dual). All substitute parts listed maintain the 14-PDIP package and through-hole mounting configuration. Voltage supply ranges and current specifications define the operational envelope within which substitutes function. Frequency ratings indicate maximum oscillation capability; parts with higher frequency ratings can operate at lower frequencies required by the original design. Temperature operating ranges must encompass or exceed the application requirements.

Parameter Comparison

Engineering Selection Recommendations

ICM7556IPD+ (Direct Upgrade): Identical electrical and mechanical specifications to the original ICM7556IPD with active product status and ROHS3 compliance. This represents the primary substitution path for designs requiring no circuit modification.

TLC556IN (Preferred Alternative): Active product status with extended operating temperature range (-40°C ~ 85°C), ROHS3 compliance, and compatible voltage supply envelope (3V ~ 15V). Higher frequency capability (2.1MHz) accommodates the original 500kHz requirement. Suitable for applications requiring long-term availability and regulatory compliance.

ICM7556IPDZ (Frequency-Enhanced Option): Renesas-manufactured alternative with 1MHz frequency rating and extended voltage range (2V ~ 18V). Obsolete status limits long-term procurement viability. Applicable where higher frequency operation provides design margin.

TLC552CN and TLC556CN (Last Time Buy Status): Both Texas Instruments parts offer ROHS3 compliance but carry Last Time Buy designation, indicating limited future availability. TLC552CN operates at 2.8MHz with wider voltage range (1V ~ 18V) but restricted temperature range (0°C ~ 70°C). TLC556CN operates at 2.1MHz with temperature range 0°C ~ 70°C. These options are suitable only for applications with defined production end dates.

Frequently Asked Questions (FAQ)

Q: Can ICM7556IPD+ be used as a direct replacement for ICM7556IPD? A: Yes. ICM7556IPD+ maintains identical frequency (500kHz), voltage supply range (3V ~ 16.5V), current consumption (60 µA), operating temperature range (-20°C ~ 85°C), and 14-DIP package configuration. The primary difference is active product status and ROHS3 compliance.

Q: What is the primary advantage of TLC556IN over other substitutes? A: TLC556IN combines active product status with extended operating temperature range (-40°C ~ 85°C), ensuring long-term availability and suitability for applications requiring wider temperature operation. ROHS3 compliance satisfies modern regulatory requirements.

Q: Are higher frequency-rated parts (TLC552CN at 2.8MHz, TLC556CN at 2.1MHz) compatible with designs requiring 500kHz operation? A: Yes. Higher frequency-rated parts can operate at lower frequencies through circuit design adjustment. However, verify that the operating temperature range (0°C ~ 70°C for both TLC552CN and TLC556CN) meets application requirements, as this is more restrictive than the original ICM7556IPD specification.

Q: Why is product status important in selecting a substitute? A: Product status indicates availability horizon. Active status (ICM7556IPD+, TLC556IN) ensures continued procurement. Last Time Buy status (TLC552CN, TLC556CN) indicates limited future availability. Obsolete status (ICM7556IPDZ) may restrict procurement to existing inventory.

Q: Do all substitute parts use the same 14-DIP package? A: Yes. All listed substitutes maintain the 14-DIP (0.300", 7.62mm) package with through-hole mounting, ensuring mechanical and electrical compatibility with existing PCB designs without layout modification.

Q: What voltage supply range considerations apply when selecting a substitute? A: The original ICM7556IPD operates at 3V ~ 16.5V. All substitutes support this range or exceed it. TLC552CN (1V ~ 18V) and ICM7556IPDZ (2V ~ 18V) offer extended lower voltage capability. Verify that the selected substitute's voltage range encompasses the application's power supply specifications.