AT24C01A-10PC EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The AT24C01A-10PC is a 1Kbit EEPROM memory integrated circuit manufactured by Microchip Technology, designed for non-volatile data storage applications requiring I2C serial interface communication. This device operates at 400 kHz clock frequency with 900 ns access time and is housed in an 8-DIP through-hole package.

The AT24C01A-10PC is classified as obsolete. Locating equivalent or substitute components is necessary for new designs, production continuity, and system upgrades where this legacy device is no longer readily available or preferred for new implementations.

Key Parameters

Parameter	Value
Memory Type	Non-Volatile EEPROM
Memory Size	1Kbit
Memory Organization	128 x 8
Memory Interface	I2C
Clock Frequency	400 kHz
Access Time	900 ns
Write Cycle Time	5 ms
Supply Voltage	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package Type	8-DIP (0.300", 7.62mm)
Mounting Type	Through Hole

Substitute Part Grouping Explanation

Substitution of the AT24C01A-10PC is determined by strict equivalence across the following critical parameters:

Memory capacity (1Kbit) and organization (128 x 8 bits)
Serial interface protocol (I2C)
Clock frequency support (400 kHz minimum)
Access time (900 ns)
Physical package (8-DIP through-hole)
Supply voltage range (4.5V ~ 5.5V compatible)

The 24C01C-I/P qualifies as a direct substitute based on matching all core electrical and mechanical specifications. Variations in write cycle time, operating temperature range, product status, and compliance certifications do not affect functional substitutability for applications within the specified parameter envelope.

Parameter Comparison

Parameter	AT24C01A-10PC	24C01C-I/P	Compatibility
Memory Size	1Kbit	1Kbit	Equivalent
Memory Organization	128 x 8	128 x 8	Equivalent
Memory Interface	I2C	I2C	Equivalent
Clock Frequency	400 kHz	400 kHz	Equivalent
Access Time	900 ns	900 ns	Equivalent
Supply Voltage	4.5V ~ 5.5V	4.5V ~ 5.5V	Equivalent
Package / Case	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	Equivalent
Mounting Type	Through Hole	Through Hole	Equivalent
Write Cycle Time	5 ms	1 ms	24C01C-I/P is faster
Operating Temperature	0°C ~ 70°C	-40°C ~ 85°C	24C01C-I/P has wider range
Product Status	Obsolete	Active	24C01C-I/P actively manufactured
RoHS Status	RoHS non-compliant	ROHS3 Compliant	24C01C-I/P meets RoHS3

Engineering Selection Recommendations

The 24C01C-I/P is a direct functional substitute for the AT24C01A-10PC across all core memory and interface specifications. Selection of the 24C01C-I/P is supported by the following factors:

Active product status ensures ongoing availability and supply chain continuity
ROHS3 compliance satisfies modern regulatory requirements for new designs and manufacturing
Identical electrical interface and memory organization guarantee pin-for-pin and software compatibility
Improved write cycle time (1 ms versus 5 ms) provides performance enhancement
Extended operating temperature range (-40°C ~ 85°C) accommodates broader environmental conditions

For applications constrained to the original AT24C01A-10PC operating temperature range (0°C ~ 70°C) and supply voltage specifications, the 24C01C-I/P operates within these boundaries without functional degradation.

Frequently Asked Questions (FAQ)

Q: Can the 24C01C-I/P directly replace the AT24C01A-10PC in existing circuit designs?

A: Yes. Both devices share identical memory capacity (1Kbit), organization (128 x 8), I2C interface, clock frequency (400 kHz), access time (900 ns), supply voltage range (4.5V ~ 5.5V), and 8-DIP package dimensions. Pin-for-pin and functional compatibility is confirmed.

Q: What are the differences between these two parts?

A: The 24C01C-I/P offers three improvements: faster write cycle time (1 ms versus 5 ms), wider operating temperature range (-40°C ~ 85°C versus 0°C ~ 70°C), and ROHS3 compliance versus non-compliance. These differences do not affect substitutability for applications within the AT24C01A-10PC's original specifications.

Q: Is the 24C01C-I/P suitable for applications requiring the 0°C ~ 70°C temperature range?

A: Yes. The 24C01C-I/P operating range of -40°C ~ 85°C fully encompasses the 0°C ~ 70°C specification of the AT24C01A-10PC. Operation within the narrower temperature band is fully supported.

Q: Does the faster write cycle time of the 24C01C-I/P affect compatibility?

A: No. Faster write cycle time is a performance enhancement that does not impact functional compatibility. Systems designed for the 5 ms write cycle of the AT24C01A-10PC will operate correctly with the 1 ms write cycle of the 24C01C-I/P.

Q: Are there packaging differences between these devices?

A: No. Both devices are supplied in 8-DIP (0.300", 7.62mm) through-hole packages. PCB layout and mechanical mounting are identical.

Q: Why is the AT24C01A-10PC classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The 24C01C-I/P is the active equivalent maintained in current production by Microchip Technology.

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