Part A
70V659S12DRGI
美國瑞薩電子公司
- Lifecycle
- Active
- Stock
- 1522 件
- Package
- PQFP-208
- Series
- 記憶力
Replacement verdict
Compatible functional replacement candidate
The 70V659S12DRGI and 70V659S12DR are functionally equivalent dual-port SRAM devices from the same manufacturer, sharing identical memory density, organization, speed grade, and operating voltage. The primary distinction is the package option, with the DRGI suffix denoting a lead-free/RoHS-compliant green package while the DR suffix indicates the standard package variant. Both parts are suitable for direct functional substitution in new designs, provided the specific package and environmental compliance requirements of the target application are satisfied.
Memory Density and Organization
High match
Access Time / Speed Grade
High match
Supply Voltage
High match
Package and Environmental Compliance
Validation required
Parts at a glance
Part B
70V659S12DR
美國瑞薩電子公司
- Lifecycle
- Active
- Stock
- 2811 件
- Package
- BFQFP-208
- Series
- 記憶力
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | 70V659S12DRGI | 70V659S12DR | Why it matters |
|---|---|---|---|
| Manufacturer | Renesas Electronics America Inc | Renesas Electronics America Inc | Identical manufacturer ensures the same design, process, and quality standards for both parts. |
| Memory Type | SRAM - Dual Port, Asynchronous | SRAM - Dual Port, Asynchronous | Both are asynchronous dual-port SRAMs, so they serve the same functional role in a system. |
| Memory Size | 4Mbit (128K x 36) | 4Mbit (128K x 36) | Matching density and organization ensures identical storage capacity and addressing. |
| Access Time | 12 ns | 12 ns | Same access time means equivalent read/write speed and timing compatibility. |
| Supply Voltage | 3.15 V to 3.45 V | 3.15 V to 3.45 V | Identical voltage range ensures the same power supply requirements and logic levels. |
| Operating Temperature | -40°C to 85°C | 0°C to 70°C | The industrial temperature range of the DRGI version allows use in harsher environments than the commercial DR version. |
| Package / Case | 208-BGA | 208-BGA | Same package and pinout allow direct board-level substitution without layout changes. |
| Mounting Type | Surface Mount | Surface Mount | Identical mounting method ensures mechanical compatibility with the PCB. |
| RoHS Status | RoHS Compliant | Non-RoHS Compliant | RoHS compliance affects environmental regulations and may restrict use in certain markets. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 70V659S12DRGI | 70V659S12DR |
|---|---|---|
| Supplier | - | Renesas Electronics America Inc |
| Part Status | Active | Obsolete |
| Memory Type | Volatile | Volatile |
| Memory Format | SRAM | SRAM |
| Technology | SRAM - Dual Port, Asynchronous | SRAM - Dual Port, Asynchronous |
| Memory Size | 4.5Mb (128K x 36) | 4.5Mb (128K x 36) |
| Memory Interface | Parallel | Parallel |
| Write Cycle Time - Word Page | 12ns | 12ns |
| Access Time | 12 ns | 12 ns |
| Voltage - Supply | 3.15V ~ 3.45V | 3.15V ~ 3.45V |
| Operating Temperature | -40°C ~ 85°C (TA) | 0°C ~ 70°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What is the difference between the 70V659S12DRGI and the 70V659S12DR?
The 70V659S12DRGI and 70V659S12DR are both 128K x 36 dual-port static RAM devices from the IDT (now Renesas) 70V659 series with a 12 ns access time. The primary difference is the package and environmental rating: the 70V659S12DRGI is supplied in a 208-pin PQFP (Plastic Quad Flat Pack) with a green/lead-free (RoHS-compliant) construction and an industrial temperature range, while the 70V659S12DR is supplied in the same 208-pin PQFP but in a standard (non-green) construction and a commercial temperature range. The "GI" suffix denotes the green/industrial variant.
Are the 70V659S12DRGI and 70V659S12DR functionally interchangeable?
Functionally, both devices provide the same 128K x 36 dual-port SRAM architecture, 12 ns access time, and identical pinout in the 208-pin PQFP package. However, they are not drop-in interchangeable in all applications because the 70V659S12DRGI is rated for the industrial temperature range while the 70V659S12DR is rated for the commercial temperature range. A design requiring industrial temperature operation must use the 70V659S12DRGI or an equivalent industrial-rated device.
What is the operating temperature range of the 70V659S12DRGI versus the 70V659S12DR?
The 70V659S12DRGI is specified for the industrial temperature range of -40°C to +85°C. The 70V659S12DR is specified for the commercial temperature range of 0°C to +70°C. These ranges are defined in the respective IDT/Renesas datasheets for the 70V659 series.
Does the 70V659S12DRGI comply with RoHS while the 70V659S12DR does not?
Yes. The "G" in the 70V659S12DRGI suffix indicates a green/lead-free (RoHS-compliant) package construction. The 70V659S12DR does not carry the "G" designation and is a standard non-green construction. Designers with RoHS compliance requirements should select the 70V659S12DRGI or verify the specific RoHS status of the 70V659S12DR with the manufacturer.
What is the memory organization and access time of both the 70V659S12DRGI and 70V659S12DR?
Both devices are organized as 128K x 36 (4,718,592 bits) dual-port SRAM with a 12 ns maximum access time. The "12" in the part number denotes the 12 ns speed grade. These parameters are common to both the 70V659S12DRGI and the 70V659S12DR.
Can the 70V659S12DRGI be used as a direct replacement for the 70V659S12DR in a commercial-temperature design?
Yes, in most cases the 70V659S12DRGI can replace the 70V659S12DR in a commercial-temperature design because the industrial-rated device covers the commercial temperature range and has the same functionality, pinout, and package. However, the designer should verify that the green/lead-free construction and any minor parametric differences are acceptable for the specific application and that the board assembly process is compatible with the lead-free finish.
What package type do the 70V659S12DRGI and 70V659S12DR use?
Both the 70V659S12DRGI and the 70V659S12DR are supplied in a 208-pin Plastic Quad Flat Pack (PQFP). The package code "DR" in the part number refers to this 208-pin PQFP configuration. The physical dimensions and pinout are identical between the two variants.
Which device should be selected for an industrial-temperature application, the 70V659S12DRGI or the 70V659S12DR?
For an industrial-temperature application, the 70V659S12DRGI must be selected because it is rated for -40°C to +85°C. The 70V659S12DR is only rated for 0°C to +70°C and should not be used outside that range. Using the commercial-temperature device in an industrial environment may result in unreliable operation or device failure.