W97AH2KBVX2E Equivalent & Substitute Parts

Part Overview

The W97AH2KBVX2E is a 1Gbit Mobile LPDDR2 SDRAM memory integrated circuit manufactured by Winbond Electronics. This parallel interface DRAM operates at 400 MHz and is housed in a 134-VFBGA package measuring 10x11.5mm. The device is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing system support and new design implementations. Substitute parts must maintain electrical compatibility across memory capacity, interface type, clock frequency, voltage specifications, and thermal operating range.

Key Parameters

Parameter	Value
Memory Type	Volatile DRAM
Memory Format	SDRAM - Mobile LPDDR2
Memory Size	1Gbit
Memory Organization	32M x 32
Memory Interface	Parallel
Clock Frequency	400 MHz
Write Cycle Time	15ns
Voltage Supply Range	1.14V ~ 1.95V
Operating Temperature	-25°C ~ 85°C
Mounting Type	Surface Mount
Package Type	134-VFBGA (10x11.5)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	3 (168 Hours)

Substitute Part Grouping Explanation

Substitute parts for the W97AH2KBVX2E are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Matching Parameters:

Memory capacity: 1Gbit
Memory organization: 32M x 32
Interface type: Parallel
Clock frequency: 400 MHz
Write cycle time: 15ns
Voltage supply range: 1.14V ~ 1.95V (minimum overlap required)
Mounting type: Surface Mount
RoHS3 compliance
Moisture sensitivity level: 3

Package Compatibility: Substitute parts must use BGA packages with equivalent footprint dimensions (10x11.5mm). Minor package designation variations (VFBGA versus TFBGA) are acceptable provided pin count and pitch remain identical at 134 pins.

Operating Temperature Consideration: The substitute part may extend the lower operating temperature limit beyond the original specification without affecting substitution validity, as this represents an expanded operating envelope.

Parameter Comparison

Parameter	W97AH2KBVX2E (Winbond)	IS43LD32320C-25BLI (ISSI)
Manufacturer	Winbond Electronics	ISSI (Integrated Silicon Solution Inc)
Memory Type	Volatile DRAM	Volatile DRAM
Memory Format	SDRAM - Mobile LPDDR2	SDRAM - Mobile LPDDR2-S4
Memory Size	1Gbit	1Gbit
Memory Organization	32M x 32	32M x 32
Memory Interface	Parallel	Parallel
Clock Frequency	400 MHz	400 MHz
Write Cycle Time	15ns	15ns
Voltage Supply Range	1.14V ~ 1.95V	1.14V ~ 1.95V
Operating Temperature	-25°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount
Package / Case	134-VFBGA (10x11.5)	134-TFBGA (10x11.5)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	3 (168 Hours)	3 (168 Hours)
Product Status	Obsolete	Active

Engineering Selection Recommendations

The IS43LD32320C-25BLI manufactured by ISSI qualifies as a direct substitute for the W97AH2KBVX2E. Both devices share identical electrical specifications across memory capacity, organization, interface type, clock frequency, write cycle time, and voltage supply range. The ISSI part maintains ROHS3 compliance and equivalent moisture sensitivity classification.

The primary distinction between these parts is product status: the Winbond device is obsolete while the ISSI equivalent remains in active production. This status difference, combined with the ISSI part's extended lower operating temperature range (-40°C versus -25°C), positions the IS43LD32320C-25BLI as the preferred selection for new designs and ongoing system support.

Package designation differences (VFBGA versus TFBGA) do not preclude substitution, as both packages maintain identical pin counts, pitch, and physical dimensions at 134 pins in a 10x11.5mm footprint. PCB layout and reflow profiles remain compatible between these package variants.

Frequently Asked Questions (FAQ)

Q: Can the IS43LD32320C-25BLI directly replace the W97AH2KBVX2E in existing designs?

A: Yes. Both devices share identical memory capacity (1Gbit), organization (32M x 32), interface type (parallel), clock frequency (400 MHz), write cycle time (15ns), and voltage supply range (1.14V ~ 1.95V). Surface mount mounting type and package footprint dimensions (10x11.5mm) are equivalent. No circuit modifications are required.

Q: What is the difference between 134-VFBGA and 134-TFBGA packages?

A: Both designations refer to 134-pin ball grid array packages with identical physical dimensions (10x11.5mm) and pin pitch. The letter designation indicates minor variations in package construction or substrate material. These variations do not affect electrical performance or PCB compatibility for this application.

Q: Why does the ISSI part have a lower operating temperature limit of -40°C compared to -25°C for the Winbond part?

A: The ISSI IS43LD32320C-25BLI supports an extended operating temperature range. This expanded specification does not affect substitution validity; it represents an additional capability of the substitute part. Systems designed for the original -25°C to 85°C range operate within the ISSI part's qualified envelope.

Q: Are there any compliance or certification differences between these parts?

A: Both parts maintain ROHS3 compliance, identical moisture sensitivity levels (MSL 3 at 168 hours), and REACH unaffected status. Electrical and environmental certifications are equivalent.

Q: What inventory status should influence component selection?

A: The ISSI IS43LD32320C-25BLI is in active production with 2100 pieces available in stock, while the Winbond W97AH2KBVX2E is obsolete with 1146 pieces remaining. For new designs and long-term system support, the active ISSI part ensures supply continuity and future availability.

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