W9425G6JB-5I Equivalent & Substitute Parts

Part Overview

The W9425G6JB-5I is a 256Mbit SDRAM DDR memory IC manufactured by Winbond Electronics in a 60-TFBGA (8x13) package. This part operates at 200 MHz with a 55 ns access time and is designed for parallel memory applications requiring 2.3V to 2.7V supply voltage. The product is classified as obsolete, making equivalent substitute parts necessary for ongoing system support, maintenance, and new production requirements where legacy compatibility is required.

Key Parameters

Parameter	Value
Manufacturer Part Number	W9425G6JB-5I
Manufacturer	Winbond Electronics
Memory Type	Volatile DRAM
Memory Format	SDRAM - DDR
Memory Size	256Mbit
Memory Organization	16M x 16
Memory Interface	Parallel
Clock Frequency	200 MHz
Access Time	55 ns
Write Cycle Time	15 ns
Voltage Supply	2.3V ~ 2.7V
Operating Temperature	-40°C ~ 85°C
Package / Case	60-TFBGA (8x13)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	3 (168 Hours)

Substitute Part Grouping Explanation

Substitute parts for the W9425G6JB-5I are selected based on strict electrical and mechanical compatibility criteria. The following parameters must align for functional substitution:

Critical Matching Parameters:

Memory Size: 256Mbit
Memory Organization: 16M x 16
Memory Format: SDRAM - DDR
Memory Interface: Parallel
Package / Case: 60-TFBGA (8x13)
Voltage Supply: 2.3V ~ 2.7V
Mounting Type: Surface Mount
Write Cycle Time: 15 ns

Allowable Variation Parameters:

Clock Frequency: 166 MHz to 200 MHz (backward compatible)
Access Time: 700 ps or faster (improved performance acceptable)
Operating Temperature: -40°C ~ 85°C (full range preferred; 0°C ~ 70°C acceptable for limited applications)
Packaging Format: Tray or Tape & Reel (TR) both acceptable

Substitute parts are grouped by manufacturer and operating temperature range to facilitate selection based on application requirements and inventory availability.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Organization	Clock Frequency	Access Time	Operating Temperature	Package	Packaging Format	Product Status
W9425G6JB-5I	Winbond Electronics	256Mbit	16M x 16	200 MHz	55 ns	-40°C ~ 85°C	60-TFBGA (8x13)	Tray	Obsolete
AS4C16M16D1-5BCN	Alliance Memory, Inc.	256Mbit	16M x 16	200 MHz	700 ps	0°C ~ 70°C	60-TFBGA (8x13)	Tray	Active
AS4C16M16D1-5BCNTR	Alliance Memory, Inc.	256Mbit	16M x 16	200 MHz	700 ps	0°C ~ 70°C	60-TFBGA (8x13)	Tape & Reel (TR)	Active
AS4C16M16D1-5BIN	Alliance Memory, Inc.	256Mbit	16M x 16	200 MHz	700 ps	-40°C ~ 85°C	60-TFBGA (8x13)	Tray	Active
AS4C16M16D1-5BINTR	Alliance Memory, Inc.	256Mbit	16M x 16	200 MHz	700 ps	-40°C ~ 85°C	60-TFBGA (8x13)	Tape & Reel (TR)	Active
IS43R16160F-5BL-TR	Integrated Silicon Solution	256Mbit	16M x 16	200 MHz	700 ps	0°C ~ 70°C	60-TFBGA (8x13)	Tape & Reel (TR)	Active
IS43R16160F-5BLI	ISSI, Integrated Silicon Solution Inc	256Mbit	16M x 16	200 MHz	700 ps	-40°C ~ 85°C	60-TFBGA (8x13)	Tray	Active
IS43R16160F-5BLI-TR	ISSI, Integrated Silicon Solution Inc	256Mbit	16M x 16	200 MHz	700 ps	-40°C ~ 85°C	60-TFBGA (8x13)	Tape & Reel (TR)	Active
IS43R16160F-6BLI	ISSI, Integrated Silicon Solution Inc	256Mbit	16M x 16	166 MHz	700 ps	-40°C ~ 85°C	60-TFBGA (8x13)	Tray	Active
IS43R16160F-6BLI-TR	ISSI, Integrated Silicon Solution Inc	256Mbit	16M x 16	166 MHz	700 ps	-40°C ~ 85°C	60-TFBGA (8x13)	Tape & Reel (TR)	Active
IS46R16160F-5BLA1	ISSI, Integrated Silicon Solution Inc	256Mbit	16M x 16	200 MHz	700 ps	-40°C ~ 85°C	60-TFBGA (8x13)	Tray	Active

Engineering Selection Recommendations

Full Temperature Range Substitutes (-40°C ~ 85°C):

For applications requiring the complete operating temperature range of the original W9425G6JB-5I, the following active parts provide direct substitution:

AS4C16M16D1-5BIN (Tray) or AS4C16M16D1-5BINTR (Tape & Reel): Alliance Memory DDR SDRAM with 700 ps access time, matching all critical electrical parameters and full temperature range.
IS43R16160F-5BLI (Tray) or IS43R16160F-5BLI-TR (Tape & Reel): ISSI DDR SDRAM at 200 MHz with 700 ps access time and full temperature range support.
IS43R16160F-6BLI (Tray) or IS43R16160F-6BLI-TR (Tape & Reel): ISSI DDR SDRAM at 166 MHz with 700 ps access time and full temperature range support. Clock frequency is reduced but backward compatible.
IS46R16160F-5BLA1 (Tray): ISSI DDR SDRAM at 200 MHz with 700 ps access time and full temperature range support.

Limited Temperature Range Substitutes (0°C ~ 70°C):

For applications with restricted operating temperature requirements:

AS4C16M16D1-5BCN (Tray) or AS4C16M16D1-5BCNTR (Tape & Reel): Alliance Memory DDR SDRAM with 700 ps access time, suitable for 0°C to 70°C environments.
IS43R16160F-5BL-TR (Tape & Reel): ISSI DDR SDRAM at 200 MHz with 700 ps access time for 0°C to 70°C operating range.

All substitute parts are ROHS3 compliant and carry MSL 3 (168 Hours) moisture sensitivity rating, matching the original part's environmental compliance profile.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a different clock frequency?

A: Yes. The W9425G6JB-5I operates at 200 MHz. Substitute parts operating at 166 MHz (such as IS43R16160F-6BLI and IS43R16160F-6BLI-TR) are backward compatible and function correctly in systems designed for the original part. Lower clock frequencies do not create compatibility issues in DDR SDRAM applications.

Q: What is the difference between Tray and Tape & Reel packaging?

A: Both packaging formats contain identical memory ICs. Tray packaging is used for manual handling and smaller quantity orders. Tape & Reel (TR) packaging is used for automated assembly processes and higher volume production. Selection depends on manufacturing process requirements, not electrical performance.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts are ROHS3 compliant, matching the environmental compliance of the original W9425G6JB-5I.

Q: Why is the access time listed as 700 ps for substitutes instead of 55 ns?

A: The original part specifies 55 ns access time. Substitute parts specify 700 ps (0.7 ns), which represents improved performance. This faster access time is fully compatible with systems designed for the original part and does not create functional issues.

Q: Which substitute should I choose for extended temperature applications?

A: For applications requiring operation across the full -40°C to 85°C temperature range, select from: AS4C16M16D1-5BIN, AS4C16M16D1-5BINTR, IS43R16160F-5BLI, IS43R16160F-5BLI-TR, IS43R16160F-6BLI, IS43R16160F-6BLI-TR, or IS46R16160F-5BLA1. Parts specified for 0°C to 70°C operation (AS4C16M16D1-5BCN, AS4C16M16D1-5BCNTR, IS43R16160F-5BL-TR) are not suitable for full temperature range applications.

Q: Can I mix different substitute parts in the same system?

A: All listed substitute parts share identical memory capacity (256Mbit), organization (16M x 16), interface (Parallel), package (60-TFBGA), and voltage requirements (2.3V ~ 2.7V). They are electrically interchangeable and can be used together in the same system.

Q: Is the W9425G6JB-5I still available?

A: The W9425G6JB-5I is classified as obsolete. Current inventory of 3,838 pieces is available, but no new production is occurring. For new designs or long-term supply requirements, selection of an active substitute part is necessary.

Q: What does MSL 3 (168 Hours) mean?

A: MSL (Moisture Sensitivity Level) 3 indicates the component can be exposed to moisture for up to 168 hours at specified humidity and temperature conditions before soldering. All listed parts, including the original and substitutes, carry this same MSL rating.

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