CY7C109B-15ZXC Equivalent & Substitute Parts

Part Overview

The CY7C109B-15ZXC is a 1Mbit asynchronous SRAM memory IC manufactured by Infineon Technologies, organized as 128K x 8 with parallel interface and 15 ns access time. This component is classified as obsolete, making substitute parts necessary for new designs, maintenance, or production continuity. The part operates within the 4.5V to 5.5V supply voltage range and is housed in a 32-TFSOP surface mount package.

Key Parameters

Parameter	Value
Memory Type	Volatile SRAM
Memory Size	1Mbit
Memory Organization	128K x 8
Memory Interface	Parallel
Access Time	15 ns
Write Cycle Time	15 ns
Voltage Supply Range	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package Type	32-TFSOP
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the CY7C109B-15ZXC is determined by the following critical parameters:

Memory capacity (1Mbit) and organization (128K x 8)
Parallel interface architecture
Supply voltage compatibility (4.5V ~ 5.5V)
Package form factor (32-TFSOP)
Access time equal to or faster than 15 ns
Surface mount technology

The IS61C1024AL-12TLI meets all substitution criteria. It maintains identical memory capacity, organization, interface type, and package specifications. The substitute part features 12 ns access time, which is faster than the original 15 ns specification, ensuring functional compatibility in circuits designed for the CY7C109B-15ZXC.

Parameter Comparison

Parameter	CY7C109B-15ZXC (Infineon)	IS61C1024AL-12TLI (ISSI)
Memory Size	1Mbit	1Mbit
Memory Organization	128K x 8	128K x 8
Memory Interface	Parallel	Parallel
Access Time	15 ns	12 ns
Write Cycle Time	15 ns	12 ns
Voltage Supply Range	4.5V ~ 5.5V	4.5V ~ 5.5V
Package Type	32-TFSOP	32-TFSOP
Mounting Type	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active

Engineering Selection Recommendations

The IS61C1024AL-12TLI is a direct functional substitute for the CY7C109B-15ZXC. Both parts are ROHS3 compliant and REACH unaffected, meeting regulatory requirements for equivalent component selection. The substitute part carries active product status, ensuring availability and supply chain continuity compared to the obsolete CY7C109B-15ZXC.

The faster access time (12 ns versus 15 ns) of the IS61C1024AL-12TLI provides performance margin without requiring circuit redesign. Pin-to-pin compatibility and identical package specifications enable direct replacement in existing PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can the IS61C1024AL-12TLI directly replace the CY7C109B-15ZXC in existing designs?

A: Yes. Both parts share identical memory capacity (1Mbit), organization (128K x 8), parallel interface, supply voltage range (4.5V ~ 5.5V), and 32-TFSOP package specifications. The faster access time of the substitute part ensures compatibility.

Q: What is the primary reason for substitution?

A: The CY7C109B-15ZXC is classified as obsolete. The IS61C1024AL-12TLI maintains active product status, providing reliable supply availability.

Q: Are there package or mounting differences between these parts?

A: No. Both parts use 32-TFSOP surface mount packaging with identical physical dimensions (0.724" × 18.40mm width), allowing direct PCB placement without modification.

Q: Do both parts meet the same regulatory standards?

A: Yes. Both the CY7C109B-15ZXC and IS61C1024AL-12TLI are ROHS3 compliant and REACH unaffected.

Q: What is the performance difference between these parts?

A: The IS61C1024AL-12TLI operates with 12 ns access and write cycle times, compared to 15 ns for the CY7C109B-15ZXC. This faster performance is backward compatible with circuits designed for the original part.

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