AS7C3256A-10TCN Equivalent & Substitute Parts

Part Overview

The AS7C3256A-10TCN is a 256Kbit asynchronous SRAM memory IC manufactured by Alliance Memory, Inc., configured as 32K x 8 with parallel interface and 10 ns access time. The device is packaged in 28-TSSOP surface mount format and operates from 3V to 3.6V supply voltage across the commercial temperature range of 0°C to 70°C. This part maintains Active product status with ROHS3 compliance and is currently in stock inventory.

Equivalent and substitute parts are necessary when the original part becomes unavailable, when extended temperature range operation is required, or when alternative manufacturers' devices meet the same functional and electrical specifications within acceptable performance parameters.

Key Parameters

Parameter	Value
Memory Type	Volatile SRAM
Memory Size	256Kbit
Memory Organization	32K x 8
Memory Interface	Parallel
Access Time	10 ns
Write Cycle Time	10 ns
Voltage Supply Range	3V to 3.6V
Operating Temperature	0°C to 70°C
Package Type	28-TSSOP
RoHS Status	ROHS3 Compliant
MSL Rating	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution eligibility for the AS7C3256A-10TCN is determined by the following critical parameters:

Core Electrical Requirements:

Memory capacity: 256Kbit minimum
Memory organization: 32K x 8 configuration
Interface type: Parallel interface
Access time: 10 ns or faster
Supply voltage range: Must encompass 3V to 3.6V
Package: 28-TSSOP form factor

Compliance Requirements:

RoHS3 compliance mandatory
MSL rating 3 or better
REACH unaffected status

Substitute parts are grouped into two categories based on operating temperature range compatibility:

Category A - Commercial Temperature Range (0°C to 70°C): Parts with identical or narrower temperature specifications suitable for direct replacement in commercial applications.

Category B - Extended Temperature Range (-40°C to 85°C): Parts with broader temperature specifications providing enhanced operational flexibility for industrial and extended-range applications.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Organization	Access Time (ns)	Write Cycle (ns)	Supply Voltage	Operating Temp	Package	Product Status
AS7C3256A-10TCN	Alliance Memory	256Kbit	32K x 8	10	10	3V to 3.6V	0°C to 70°C	28-TSSOP	Active
AS7C3256A-10TIN	Alliance Memory	256Kbit	32K x 8	10	10	3V to 3.6V	-40°C to 85°C	28-TSSOP	Active
AS7C3256A-12TCN	Alliance Memory	256Kbit	32K x 8	12	12	3V to 3.6V	0°C to 70°C	28-TSSOP	Active
IS61LV256AL-10TLI	ISSI	256Kbit	32K x 8	10	10	3.135V to 3.6V	-40°C to 85°C	28-TSSOP	Active
IS62LV256AL-45TLI	ISSI	256Kbit	32K x 8	45	45	3V to 3.6V	-40°C to 85°C	28-TSSOP	Active
71V256SA15PZGI	Renesas Electronics	256Kbit	32K x 8	15	15	3V to 3.6V	-40°C to 85°C	28-TSSOP	Obsolete

Engineering Selection Recommendations

Direct Replacement (Identical Specifications): AS7C3256A-10TIN is the primary equivalent, offering identical electrical performance with extended temperature range operation. Both parts are manufactured by Alliance Memory with Active product status and ROHS3 compliance. The AS7C3256A-10TIN is suitable for applications requiring broader temperature coverage while maintaining 10 ns access time performance.

Performance-Compatible Substitutes: IS61LV256AL-10TLI from ISSI provides equivalent 10 ns access time with Active product status and ROHS3 compliance. The supply voltage range begins at 3.135V, which encompasses the 3V to 3.6V specification of the original part. Extended temperature range operation is supported.

Slower Access Time Alternatives: AS7C3256A-12TCN and 71V256SA15PZGI are substitutes for applications where slower access times are acceptable. The AS7C3256A-12TCN maintains commercial temperature range operation with 12 ns access time. The 71V256SA15PZGI from Renesas provides 15 ns access time with extended temperature range but carries Obsolete product status.

IS62LV256AL-45TLI is suitable only for applications with relaxed timing requirements, offering 45 ns access time with Active product status and extended temperature range.

Compliance Verification: All recommended substitutes maintain ROHS3 compliance, MSL rating 3, and REACH unaffected status consistent with the original AS7C3256A-10TCN specification.

Frequently Asked Questions (FAQ)

Q: Can AS7C3256A-10TIN replace AS7C3256A-10TCN in all applications? A: Yes, AS7C3256A-10TIN is a direct functional equivalent with identical electrical specifications and access time. The extended temperature range (-40°C to 85°C) provides broader operational capability. Both parts are manufactured by Alliance Memory with Active status and ROHS3 compliance.

Q: What is the difference between AS7C3256A-10TCN and AS7C3256A-12TCN? A: The primary difference is access time: AS7C3256A-10TCN operates at 10 ns while AS7C3256A-12TCN operates at 12 ns. Both maintain identical memory capacity, organization, and commercial temperature range. AS7C3256A-12TCN is suitable only for applications where 12 ns access time meets timing requirements.

Q: Is IS61LV256AL-10TLI compatible with AS7C3256A-10TCN? A: IS61LV256AL-10TLI is electrically compatible with identical 10 ns access time and 256Kbit capacity. The supply voltage range begins at 3.135V, which is within the 3V to 3.6V specification. Both devices use 28-TSSOP packaging. IS61LV256AL-10TLI is manufactured by ISSI with Active product status.

Q: Why is 71V256SA15PZGI listed as Obsolete? A: The 71V256SA15PZGI from Renesas Electronics carries Obsolete product status, indicating discontinued manufacturing. While electrically compatible for applications accepting 15 ns access time, this part should not be selected for new designs or long-term supply requirements.

Q: Can IS62LV256AL-45TLI be used as a direct replacement? A: IS62LV256AL-45TLI is not a direct replacement due to significantly slower 45 ns access time compared to the 10 ns specification of AS7C3256A-10TCN. This part is suitable only for applications with relaxed timing requirements that can tolerate the performance reduction.

Q: Are all substitute parts available in the same 28-TSSOP package? A: Yes, all listed substitute parts use 28-TSSOP (0.465", 11.80mm Width) surface mount packaging, ensuring mechanical and electrical compatibility with the original AS7C3256A-10TCN footprint.

Q: What supply voltage range must be verified for substitution? A: The original AS7C3256A-10TCN operates from 3V to 3.6V. All substitute parts must support this voltage range. IS61LV256AL-10TLI specifies 3.135V to 3.6V, which encompasses the required range. Other substitutes maintain the 3V to 3.6V specification.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message