AT28C17E-20PI Equivalent & Substitute Parts

Part Overview

The AT28C17E-20PI is a 16Kbit parallel EEPROM memory IC manufactured by Microchip Technology, housed in a 28-DIP package with 200 ns access time. This component is classified as obsolete, indicating discontinued production and limited availability in the market. Finding equivalent or substitute parts is necessary to ensure project continuity, maintain supply chain reliability, and support long-term product maintenance or redesign initiatives.

Key Parameters

Parameter	Value
Manufacturer Part Number	AT28C17E-20PI
Manufacturer	Microchip Technology
Memory Type	Non-Volatile EEPROM
Memory Size	16Kbit
Memory Organization	2K x 8
Memory Interface	Parallel
Access Time	200 ns
Write Cycle Time	200 µs
Supply Voltage	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package Type	28-DIP (0.600", 15.24mm)
Mounting Type	Through Hole
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the AT28C17E-20PI is determined by the following critical parameters:

Mechanical Compatibility:

Package type: 28-DIP (0.600", 15.24mm)
Mounting type: Through Hole
Pin count and physical dimensions must match for direct board-level replacement

Electrical Compatibility:

Memory interface: Parallel
Supply voltage range: 4.5V ~ 5.5V
Operating temperature range: -40°C ~ 85°C
Memory organization: 2K x 8 (minimum requirement for address and data bus compatibility)

Functional Compatibility:

Memory type: Non-Volatile EEPROM
Technology: EEPROM

The AT28C64B-15PU qualifies as a substitute because it maintains identical mechanical packaging, electrical voltage and temperature specifications, parallel interface architecture, and EEPROM technology. The substitute part offers increased memory capacity (64Kbit vs. 16Kbit) and faster access time (150 ns vs. 200 ns), providing enhanced performance while maintaining full backward compatibility with the original design.

Parameter Comparison

Parameter	AT28C17E-20PI (Main Part)	AT28C64B-15PU (Substitute)
Manufacturer	Microchip Technology	Microchip Technology
Memory Type	Non-Volatile EEPROM	Non-Volatile EEPROM
Memory Format	EEPROM	EEPROM
Memory Size	16Kbit	64Kbit
Memory Organization	2K x 8	8K x 8
Memory Interface	Parallel	Parallel
Access Time	200 ns	150 ns
Write Cycle Time	200 µs	10 ms
Supply Voltage	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C
Package Type	28-DIP (0.600", 15.24mm)	28-DIP (0.600", 15.24mm)
Mounting Type	Through Hole	Through Hole
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

The AT28C64B-15PU is the recommended substitute for the obsolete AT28C17E-20PI based on the following engineering criteria:

Product Status & Availability: The AT28C17E-20PI is obsolete with limited stock availability. The AT28C64B-15PU is an active product with verified availability (3308 units in stock), ensuring reliable supply for current and future production requirements.

Compliance & Certifications: The AT28C64B-15PU achieves ROHS3 compliance, meeting modern environmental and regulatory standards. Both parts maintain REACH Unaffected status and EAR99 export classification. The substitute part's compliance posture aligns with contemporary manufacturing and procurement standards.

Mechanical & Electrical Compatibility: Both parts share identical 28-DIP packaging, through-hole mounting, and electrical specifications (4.5V ~ 5.5V supply, -40°C ~ 85°C operating range). Direct board-level substitution is possible without PCB redesign or layout modifications.

Performance Enhancement: The AT28C64B-15PU provides superior access time (150 ns vs. 200 ns) and quadruple memory capacity (64Kbit vs. 16Kbit), delivering performance improvement while maintaining full backward compatibility with existing designs.

Frequently Asked Questions (FAQ)

Q: Can the AT28C64B-15PU be used as a direct replacement for the AT28C17E-20PI without PCB modifications?

A: Yes. Both parts use identical 28-DIP packaging with 0.600" (15.24mm) body dimensions and through-hole mounting. Pin-to-pin compatibility is maintained, allowing direct board-level substitution without PCB redesign.

Q: What are the key differences between these two parts?

A: The primary differences are memory capacity (16Kbit vs. 64Kbit), access time (200 ns vs. 150 ns), write cycle time (200 µs vs. 10 ms), product status (obsolete vs. active), and RoHS compliance (non-compliant vs. ROHS3 compliant). Electrical specifications and package type remain identical.

Q: Are the supply voltage and operating temperature ranges compatible?

A: Yes. Both parts operate within the identical voltage range (4.5V ~ 5.5V) and temperature range (-40°C ~ 85°C). No power supply or thermal management modifications are required.

Q: Does the increased memory capacity of the AT28C64B-15PU affect compatibility?

A: No. The larger memory capacity is transparent to the system. The substitute part's 8K x 8 organization accommodates the original 2K x 8 address space. Firmware or software modifications are not required for basic substitution.

Q: What is the significance of the RoHS compliance difference?

A: The AT28C64B-15PU meets ROHS3 compliance standards, restricting hazardous substances in manufacturing. The original AT28C17E-20PI is RoHS non-compliant. For new designs or products subject to environmental regulations, the substitute part is the appropriate choice.

Q: Is the AT28C64B-15PU programmable?

A: Yes. The AT28C64B-15PU is verified as programmable by DiGi-Electronics, confirming full programming capability and functionality.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message