TLC555IPG4 Equivalent & Substitute Parts

Part Overview

The TLC555IPG4 is a 555 Type Timer/Oscillator (Single) IC manufactured by Texas Instruments, operating at 2.1MHz with a supply voltage range of 3V to 15V. This component is classified as Obsolete, making identification of active equivalent and substitute parts essential for ongoing design support and procurement continuity. The LinCMOS™ series design provides low power consumption at 360 µA supply current. Substitute parts must maintain functional compatibility within the 8-DIP package format while meeting the electrical specifications required for timer and oscillator applications.

Substiute Parts

TLC555IPG4

Texas InstrumentsIn Stock: 1176TLC555IPG4 Datasheet

Current PartRFQ

LM555CN/NOPB

Texas InstrumentsIn Stock: 2247LM555CN/NOPB Datasheet

MFR RecommendedRFQ

LMC555CN/NOPB

Texas InstrumentsIn Stock: 3101LMC555CN/NOPB Datasheet

MFR RecommendedRFQ

TLC555IP

Texas InstrumentsIn Stock: 18103TLC555IP Datasheet

MFR RecommendedRFQ

ICM7555IPA+

Analog Devices Inc./Maxim IntegratedIn Stock: 1191ICM7555IPA+ Datasheet

MFR RecommendedRFQ

ICM7555IPAZ

Renesas Electronics CorporationIn Stock: 28143ICM7555IPAZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLC555IPG4 is determined by the following critical parameters: (1) Package compatibility—all substitutes must use 8-DIP (0.300", 7.62mm) through-hole mounting; (2) Functional type—all must be 555 Type Timer/Oscillator (Single) ICs; (3) Voltage supply range—substitute parts must support the application's required supply voltage window; (4) Frequency capability—substitute parts must support the operating frequency of the target application; (5) Current consumption—substitute parts must meet power budget constraints; (6) Operating temperature range—substitute parts must cover the required temperature window; (7) Product status and compliance—active parts with ROHS3 compliance are preferred for new designs.

Five substitute parts meet these criteria across different frequency and power consumption profiles, enabling selection based on specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: TLC555IP

The TLC555IP is the direct functional equivalent of the TLC555IPG4. It maintains identical electrical specifications: 2.1MHz frequency, 3V to 15V supply voltage range, 360 µA supply current, and -40°C to 85°C operating temperature. The TLC555IP is Active status with ROHS3 compliance and LinCMOS™ series design. This part provides the highest compatibility for direct replacement in existing designs. Inventory availability is substantial at 18,051 pieces.

Secondary Substitutes by Application Profile:

LMC555CN/NOPB: Select when higher frequency capability (3MHz) is beneficial or when lower supply voltage operation (1.5V minimum) is required. Supply current is reduced to 150 µA, supporting lower power applications. Operating temperature range matches the original part (-40°C to 85°C). Active status with ROHS3 compliance.

ICM7555IPAZ: Select for ultra-low power applications requiring minimal supply current (60 µA). Frequency capability of 1MHz is suitable for lower-speed timing applications. Voltage range extends to 18V maximum, providing broader supply compatibility. Operating temperature range of -25°C to 85°C covers most industrial applications. Active status with ROHS3 compliance.

ICM7555IPA+: Select when supply current must be minimized (30 µA) and frequency requirements are moderate (500kHz). Voltage range of 2V to 16.5V provides flexibility for battery-powered and extended-range applications. Operating temperature range of -20°C to 85°C is suitable for most environments. Active status with ROHS3 compliance.

LM555CN/NOPB: Select only when frequency requirements are very low (100kHz) and higher supply current (10 mA) is acceptable. Note that operating temperature range is limited to 0°C to 70°C and minimum supply voltage is 4.5V, which may restrict use in extended-temperature or low-voltage applications. Active status with ROHS3 compliance.

All substitute parts are ROHS3 compliant and maintain the 8-DIP through-hole package format, ensuring mechanical and electrical compatibility with existing PCB designs.

Frequently Asked Questions (FAQ)

Q: Can TLC555IP directly replace TLC555IPG4 in all applications?

A: Yes. The TLC555IP is functionally identical to the TLC555IPG4, with matching frequency (2.1MHz), supply voltage range (3V to 15V), supply current (360 µA), and operating temperature range (-40°C to 85°C). The primary difference is product status: TLC555IPG4 is Obsolete while TLC555IP is Active. Both use the same 8-DIP package and LinCMOS™ series design.

Q: What is the difference between LM555CN/NOPB and LMC555CN/NOPB?

A: Both are Texas Instruments 555 Type Timer/Oscillator ICs in 8-DIP packages. LM555CN/NOPB operates at 100kHz with supply current of 10 mA and temperature range of 0°C to 70°C. LMC555CN/NOPB operates at 3MHz with supply current of 150 µA and temperature range of -40°C to 85°C. Selection depends on frequency requirements and operating temperature constraints.

Q: Which substitute offers the lowest power consumption?

A: ICM7555IPA+ provides the lowest supply current at 30 µA. ICM7555IPAZ follows at 60 µA. Both are suitable for battery-powered and energy-constrained applications. LMC555CN/NOPB offers 150 µA, which is also low-power compared to LM555CN/NOPB at 10 mA.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed—TLC555IP, LM555CN/NOPB, LMC555CN/NOPB, ICM7555IPA+, and ICM7555IPAZ—are ROHS3 compliant, meeting environmental and regulatory requirements for modern electronics manufacturing.

Q: Can I use a substitute with a different frequency rating?

A: Frequency selection depends on application requirements. If the original design operates at 2.1MHz, TLC555IP is the direct match. If lower frequency is acceptable, ICM7555IPAZ (1MHz) or ICM7555IPA+ (500kHz) are viable. If higher frequency is needed, LMC555CN/NOPB (3MHz) is suitable. Verify that the substitute's frequency range encompasses your application's timing requirements.

Q: What is the difference between through-hole and surface-mount packages?

A: All listed substitutes use 8-DIP (0.300", 7.62mm) through-hole packages, identical to the TLC555IPG4. Through-hole components are inserted into PCB holes and soldered from the back side, suitable for breadboards, prototyping, and traditional PCB assembly. No surface-mount alternatives are provided in this substitution list.

Q: Which substitute has the widest supply voltage range?

A: ICM7555IPAZ supports 2V to 18V, the widest range among all substitutes. This provides maximum flexibility for applications with variable or extended supply voltage requirements. ICM7555IPA+ supports 2V to 16.5V, also offering broad voltage compatibility.

Q: Can I substitute parts from different manufacturers?

A: Yes. ICM7555IPA+ (Analog Devices Inc./Maxim Integrated) and ICM7555IPAZ (Renesas Electronics Corporation) are functionally equivalent 555 Type Timer/Oscillator ICs. All listed substitutes maintain the same 8-DIP package and core 555 timer functionality. Verify electrical specifications match your application requirements before substitution.