AS6C4016A-45ZIN Equivalent & Substitute Parts

Part Overview

The AS6C4016A-45ZIN is a 4Mbit asynchronous SRAM with parallel interface manufactured by Alliance Memory, Inc. This device is organized as 256K x 16 and operates with a 45 ns access time. The part is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing system support and new designs requiring similar functionality.

Key Parameters

Parameter	Value
Memory Size	4Mbit
Memory Organization	256K x 16
Memory Format	SRAM
Technology	SRAM - Asynchronous
Memory Interface	Parallel
Access Time	45 ns
Voltage Supply Range	2.7V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package / Case	44-TSOP (0.400", 10.16mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution for the AS6C4016A-45ZIN is determined by the following critical parameters:

Memory capacity (4Mbit) and organization (256K x 16)
Asynchronous SRAM technology with parallel interface
44-TSOP surface mount package
Access time compatibility (45 ns or faster)
Voltage supply range overlap with system requirements
Operating temperature range (-40°C ~ 85°C)
RoHS3 compliance and MSL rating

The substitute parts listed maintain these core specifications while varying in access time and voltage supply ranges. Faster access times are backward compatible with designs requiring 45 ns operation.

Parameter Comparison

Parameter	AS6C4016A-45ZIN	AS6C4016-55ZIN	71V416S12PHGI	IS62WV25616EBLL-45TLI
Manufacturer	Alliance Memory, Inc.	Alliance Memory, Inc.	Renesas Electronics Corporation	ISSI, Integrated Silicon Solution Inc
Memory Size	4Mbit	4Mbit	4Mbit	4Mbit
Memory Organization	256K x 16	256K x 16	256K x 16	256K x 16
Access Time	45 ns	55 ns	12 ns	45 ns
Voltage Supply Range	2.7V ~ 5.5V	2.7V ~ 5.5V	3V ~ 3.6V	2.2V ~ 3.6V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	44-TSOP	44-TSOP II	44-TSOP II	44-TSOP II
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Discontinued at DiGi Electronics	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

AS6C4016-55ZIN is the primary substitute from Alliance Memory, Inc., maintaining identical voltage supply range (2.7V ~ 5.5V) and package specifications. The 55 ns access time is slower than the original 45 ns specification and is suitable for designs with relaxed timing requirements.

IS62WV25616EBLL-45TLI from ISSI matches the 45 ns access time of the original part. The voltage supply range (2.2V ~ 3.6V) is narrower than the original specification and requires verification of system voltage compatibility.

71V416S12PHGI from Renesas Electronics Corporation offers the fastest access time (12 ns) among the substitutes. The voltage supply range (3V ~ 3.6V) is the most restrictive and requires confirmation of system voltage requirements. This part is suitable for designs requiring enhanced performance.

All substitute parts maintain ROHS3 compliance, MSL rating 3, and the required 44-TSOP surface mount package configuration.

Frequently Asked Questions (FAQ)

Q: Can AS6C4016-55ZIN replace AS6C4016A-45ZIN directly?

A: Yes, for designs where 55 ns access time meets timing requirements. Both parts share identical voltage supply range (2.7V ~ 5.5V), operating temperature range, and package specifications. The slower access time is the only functional difference.

Q: What is the key difference between the 71V416S12PHGI and the original part?

A: The 71V416S12PHGI has a faster access time (12 ns versus 45 ns) and a narrower voltage supply range (3V ~ 3.6V versus 2.7V ~ 5.5V). System voltage must be verified to fall within the 3V ~ 3.6V range for this substitute.

Q: Is IS62WV25616EBLL-45TLI compatible with the original AS6C4016A-45ZIN?

A: Both parts have identical 45 ns access time and 44-TSOP package. The voltage supply range differs (2.2V ~ 3.6V for ISSI versus 2.7V ~ 5.5V for Alliance Memory). System voltage must be confirmed to operate within the 2.2V ~ 3.6V overlap range.

Q: Are all substitute parts in the same package?

A: All substitute parts use 44-TSOP surface mount packages. The original part specifies 44-TSOP2, while substitutes specify 44-TSOP II. Both designations refer to the same 0.400" (10.16mm) width package footprint.

Q: What compliance certifications apply to all parts?

A: All parts listed are ROHS3 compliant with MSL rating 3 (168 Hours) and share identical ECCN and HTSUS classifications.

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