HA1-4905-5 Equivalent & Substitute Parts

Part Overview

The HA1-4905-5 is a general-purpose CMOS comparator with push-pull output configuration manufactured by Renesas Electronics Corporation. This 4-element comparator IC is packaged in a 16-CERDIP through-hole format and operates across a supply voltage range of 5V to 15V (single supply) or ±2.5V to ±7.5V (dual supply). The device is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production support.

Key Parameters

Parameter	Value
Manufacturer Part Number	HA1-4905-5
Manufacturer	Renesas Electronics Corporation
Category	Linear
Type	General Purpose Comparator
Number of Elements	4
Output Type	CMOS, Push-Pull
Voltage - Supply, Single/Dual (±)	5V ~ 15V, ±2.5V ~ 7.5V
Voltage - Input Offset (Max)	7.5mV @ ±15V
Current - Input Bias (Max)	0.15µA @ ±15V
Current - Output (Typ)	50mA
Current - Quiescent (Max)	20mA
Operating Temperature	0°C ~ 75°C
Package / Case	16-CDIP (0.300", 7.62mm)
Mounting Type	Through Hole
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the HA1-4905-5 is determined by the following critical parameters:

Functional Equivalence: All substitute parts must be 4-element general-purpose comparators with compatible output configurations (CMOS, Open-Collector, or TTL).

Electrical Compatibility: Supply voltage ranges must encompass or exceed the original specification (5V ~ 15V single supply, ±2.5V ~ 7.5V dual supply). Input offset voltage, input bias current, and output current must be within acceptable operating margins for the application.

Package Compatibility: The original 16-CERDIP through-hole package is obsolete. Substitute parts are available in modern surface-mount packages (14-SOIC, 14-TSSOP) or alternative through-hole configurations, requiring PCB redesign or adapter solutions.

Product Status: Active substitute parts ensure long-term availability and manufacturing support, contrasting with the obsolete status of the original device.

Compliance: RoHS3 compliance is standard for active substitute parts, whereas the original HA1-4905-5 is RoHS non-compliant.

Parameter Comparison

Part Number	Manufacturer	Number of Elements	Output Type	Supply Voltage Range	Input Offset (Max)	Input Bias (Max)	Output Current (Typ)	Quiescent Current (Max)	Package	Mounting Type	Product Status	RoHS Status
HA1-4905-5	Renesas	4	CMOS, Push-Pull	5V~15V, ±2.5V~7.5V	7.5mV @ ±15V	0.15µA @ ±15V	50mA	20mA	16-CDIP	Through Hole	Obsolete	Non-compliant
CMP04FSZ	Analog Devices	4	CMOS, DTL, ECL, MOS, Open-Collector, TTL	3.3V~36V, ±1.65V~18V	1mV @ 5V	0.1µA @ 5V	16mA @ 5V	3mA	14-SOIC	Surface Mount	Active	ROHS3 Compliant
LM2901D	STMicroelectronics	4	CMOS, DTL, ECL, MOS, Open-Collector, TTL	2V~32V, ±1V~16V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	14-SOIC	Surface Mount	Active	ROHS3 Compliant
LM2901DR2G	onsemi	4	CMOS, Open-Collector, TTL	3V~36V, ±1.5V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	14-SOIC	Surface Mount	Active	ROHS3 Compliant
LM2901DT	STMicroelectronics	4	CMOS, DTL, ECL, MOS, Open-Collector, TTL	2V~32V, ±1V~16V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	14-SOIC	Surface Mount	Active	ROHS3 Compliant
LM2901DTBR2G	onsemi	4	CMOS, Open-Collector, TTL	3V~36V, ±1.5V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	14-TSSOP	Surface Mount	Active	ROHS3 Compliant
LM2901EDR2G	onsemi	4	Not specified	3V~36V, ±1.5V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2mA	14-SOIC	Surface Mount	Active	ROHS3 Compliant
LM2901HYDT	STMicroelectronics	4	CMOS, DTL, ECL, MOS, Open-Collector, TTL	2V~36V, ±1V~18V	Not specified	Not specified	Not specified	2.5mA	14-SOIC	Surface Mount	Active	ROHS3 Compliant
LM2901MX/NOPB	Texas Instruments	4	Open-Collector	2V~36V, ±1V~18V	7mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	14-SOIC	Surface Mount	Active	ROHS3 Compliant
LM2901N	National Semiconductor	Not specified	Not specified	Not specified	Not specified	Not specified	Not specified	Not specified	Not specified	Not specified	Active	Not specified
LM2901VDTBR2G	onsemi	4	CMOS, Open-Collector, TTL	3V~36V, ±1.5V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	14-TSSOP	Surface Mount	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Electrical Replacement with Package Redesign:

The LM2901 series variants (LM2901D, LM2901DR2G, LM2901DT, LM2901MX/NOPB) from STMicroelectronics, onsemi, and Texas Instruments provide the closest functional equivalence to the HA1-4905-5. These devices maintain 4-element comparator architecture with compatible supply voltage ranges that encompass the original specification. All variants are active products with ROHS3 compliance, ensuring long-term availability and regulatory alignment.

For Broadest Electrical Compatibility:

The CMP04FSZ from Analog Devices offers the widest supply voltage range (3.3V to 36V single supply, ±1.65V to ±18V dual supply) and superior input offset voltage specification (1mV @ 5V). This device is suitable for applications requiring extended operating margins beyond the original HA1-4905-5 specification.

For Automotive Applications:

The LM2901HYDT from STMicroelectronics carries AEC-Q100 qualification and automotive-grade designation, appropriate for automotive and harsh-environment applications requiring enhanced reliability certifications.

Package Considerations:

All active substitute parts are available in surface-mount packages (14-SOIC or 14-TSSOP). Through-hole mounting requires either PCB redesign or the use of surface-mount-to-DIP adapter carriers. The LM2901N from National Semiconductor may offer through-hole packaging options but has limited specification data in the provided dataset.

Frequently Asked Questions (FAQ)

Q: Can the HA1-4905-5 be directly replaced without PCB modification?

A: No. The HA1-4905-5 uses a 16-CERDIP through-hole package, while all active substitute parts use surface-mount packages (14-SOIC or 14-TSSOP). PCB redesign or adapter solutions are required.

Q: What is the primary reason for substitution?

A: The HA1-4905-5 is classified as obsolete. Active substitute parts ensure continued availability, manufacturing support, and compliance with current regulatory standards (ROHS3).

Q: Are the substitute parts electrically compatible with the original HA1-4905-5?

A: Yes. All substitute parts are 4-element general-purpose comparators with supply voltage ranges that encompass or exceed the original specification (5V ~ 15V single supply, ±2.5V ~ 7.5V dual supply). Input offset voltage and input bias current specifications are comparable or superior.

Q: Which substitute part has the best input offset voltage performance?

A: The CMP04FSZ from Analog Devices specifies 1mV input offset voltage at 5V supply, superior to the HA1-4905-5 specification of 7.5mV at ±15V supply.

Q: Can I use the LM2901 series for automotive applications?

A: The LM2901HYDT from STMicroelectronics carries AEC-Q100 qualification and is suitable for automotive applications. Other LM2901 variants are commercial-grade and not qualified for automotive use.

Q: What is the difference between the 14-SOIC and 14-TSSOP packages?

A: Both are surface-mount packages with 14 pins. The 14-SOIC (Small Outline Integrated Circuit) has a body width of 0.154 inches (3.90mm), while the 14-TSSOP (Thin Shrink Small Outline Package) has a body width of 0.173 inches (4.40mm). TSSOP offers a smaller footprint and is preferred for space-constrained designs.

Q: Are all substitute parts RoHS compliant?

A: Yes. All active substitute parts listed carry ROHS3 compliance certification. The original HA1-4905-5 is RoHS non-compliant, making compliance upgrade a secondary benefit of substitution.

Q: What is the quiescent current difference between the HA1-4905-5 and substitute parts?

A: The HA1-4905-5 specifies 20mA maximum quiescent current, while substitute parts range from 2mA to 3mA. This represents a significant reduction in standby power consumption, beneficial for battery-powered or low-power applications.

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