IS43DR16640C-3DBI-TR Equivalent & Substitute Parts

Part Overview

The IS43DR16640C-3DBI-TR is a 1Gbit DDR2 SDRAM memory IC manufactured by ISSI (Integrated Silicon Solution Inc). This component features a 64M x 16 memory organization with parallel interface, operating at 333 MHz with 450 ps access time in an 84-TWBGA (8x12.5) package. The part is currently classified as obsolete, which necessitates identification of active equivalent alternatives for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Memory Type	Volatile DRAM
Technology	SDRAM - DDR2
Memory Size	1Gbit
Memory Organization	64M x 16
Memory Interface	Parallel
Clock Frequency	333 MHz
Access Time	450 ps
Write Cycle Time	15 ns
Voltage Supply	1.7V ~ 1.9V
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	84-TFBGA
Supplier Device Package	84-TWBGA (8x12.5)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the IS43DR16640C-3DBI-TR is determined by strict equivalence across the following critical parameters:

Group 1 - Pin-Compatible Substitutes (84-TWBGA Package): Substitutes maintaining identical memory organization (64M x 16), package footprint (84-TWBGA 8x12.5), and all electrical specifications are considered direct pin-compatible replacements. These parts preserve PCB layout and do not require design modification.

Group 2 - Functional Equivalents (Different Package): Substitutes with identical memory capacity (1Gbit) and electrical specifications but different package types (60-TWBGA) and memory organization (128M x 8) are functional equivalents. These require PCB redesign and are suitable only when layout flexibility exists.

Critical Parameters for Substitution:

Memory Size: 1Gbit (mandatory)
Technology: SDRAM - DDR2 (mandatory)
Clock Frequency: 333 MHz (mandatory)
Access Time: 450 ps (mandatory)
Voltage Supply: 1.7V ~ 1.9V (mandatory)
Operating Temperature: -40°C ~ 85°C (mandatory)
RoHS3 Compliance (mandatory for regulated applications)

Parameter Comparison

Parameter	IS43DR16640C-3DBI-TR (Main)	IS43DR16640C-3DBLI-TR	IS43DR81280C-3DBLI-TR	IS46DR16640C-3DBLA1-TR	IS46DR81280B-3DBLA1-TR
Product Status	Obsolete	Active	Active	Active	Active
Memory Size	1Gbit	1Gbit	1Gbit	1Gbit	1Gbit
Memory Organization	64M x 16	64M x 16	128M x 8	64M x 16	128M x 8
Technology	SDRAM - DDR2	SDRAM - DDR2	SDRAM - DDR2	SDRAM - DDR2	SDRAM - DDR2
Clock Frequency	333 MHz	333 MHz	333 MHz	333 MHz	333 MHz
Access Time	450 ps	450 ps	450 ps	450 ps	450 ps
Write Cycle Time	15 ns	15 ns	15 ns	15 ns	15 ns
Voltage Supply	1.7V ~ 1.9V	1.7V ~ 1.9V	1.7V ~ 1.9V	1.7V ~ 1.9V	1.7V ~ 1.9V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	84-TFBGA	84-TFBGA	60-TFBGA	84-TFBGA	60-TFBGA
Supplier Device Package	84-TWBGA (8x12.5)	84-TWBGA (8x12.5)	60-TWBGA (8x10.5)	84-TWBGA (8x12.5)	60-TWBGA (8x10.5)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

Direct Pin-Compatible Substitutes (No PCB Modification Required):

IS43DR16640C-3DBLI-TR and IS46DR16640C-3DBLA1-TR are recommended as primary substitutes for the obsolete IS43DR16640C-3DBI-TR. Both maintain identical memory organization (64M x 16), package footprint (84-TWBGA 8x12.5), and all electrical specifications. Both parts are active products with current manufacturing status and ROHS3 compliance. IS43DR16640C-3DBLI-TR is supplied in Tape & Reel packaging with 1011 units in stock. IS46DR16640C-3DBLA1-TR is also active with 790 units available.

Functional Equivalent Substitutes (PCB Redesign Required):

IS43DR81280C-3DBLI-TR and IS46DR81280B-3DBLA1-TR are functional equivalents with identical memory capacity (1Gbit) and electrical specifications but different package configuration (60-TWBGA 8x10.5) and memory organization (128M x 8). These substitutes require PCB layout modification and address line reconfiguration. Selection of these parts is appropriate only when design flexibility permits package change and memory organization adjustment.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance and identical moisture sensitivity levels (MSL 3, 168 Hours), ensuring regulatory and environmental compatibility with the original specification.

Frequently Asked Questions (FAQ)

Q: Can IS43DR16640C-3DBLI-TR be used as a direct replacement without PCB modification?

A: Yes. IS43DR16640C-3DBLI-TR is pin-compatible with the original IS43DR16640C-3DBI-TR. Both use the 84-TWBGA (8x12.5) package with identical pinout, memory organization (64M x 16), and electrical specifications. No PCB layout changes are required.

Q: What is the difference between the 84-TWBGA and 60-TWBGA package options?

A: The 84-TWBGA (8x12.5) package contains 84 pins and is used for 64M x 16 memory organization. The 60-TWBGA (8x10.5) package contains 60 pins and is used for 128M x 8 memory organization. These packages have different footprints and pin assignments, requiring PCB redesign for substitution.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (IS43DR16640C-3DBLI-TR, IS43DR81280C-3DBLI-TR, IS46DR16640C-3DBLA1-TR, and IS46DR81280B-3DBLA1-TR) are ROHS3 compliant with identical moisture sensitivity levels (MSL 3, 168 Hours).

Q: What are the critical electrical parameters that must match for substitution?

A: Memory size (1Gbit), technology (SDRAM - DDR2), clock frequency (333 MHz), access time (450 ps), write cycle time (15 ns), voltage supply (1.7V ~ 1.9V), and operating temperature range (-40°C ~ 85°C) must all match the original specification for functional equivalence.

Q: Can IS43DR81280C-3DBLI-TR replace IS43DR16640C-3DBI-TR in existing designs?

A: IS43DR81280C-3DBLI-TR is a functional equivalent with identical memory capacity and electrical specifications but requires PCB redesign. The different package (60-TWBGA vs. 84-TWBGA) and memory organization (128M x 8 vs. 64M x 16) necessitate address line reconfiguration and layout modification. This substitution is suitable only when design flexibility exists.

Q: What is the product status of available substitutes?

A: IS43DR16640C-3DBLI-TR, IS43DR81280C-3DBLI-TR, IS46DR16640C-3DBLA1-TR, and IS46DR81280B-3DBLA1-TR are all active products with current manufacturing status, ensuring long-term availability and supply chain continuity.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message