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Renesas R1RP0408DGE-2PI#B0
- Part No.:
- R1RP0408DGE-2PI#B0
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 36-BSOJ (0.400", 10.16mm Width)
- Datasheet:
-
R1RP0408DGE-2PI#B0.pdf
- Description:
- IC SRAM 4MBIT PARALLEL 36SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:4,693
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Product details
Overview
R1RP0408DGE-2PI#B0 from Renesas Electronics is a 4-Mbit high-speed CMOS static RAM organized as 512-kword × 8-bit, operating at 5.0 V ±10%, with 12 ns max access time and −40 to +85°C industrial temperature range. It serves as cache or buffer memory in embedded control systems requiring fast, wide-bit-width, fully static data storage without clocks or refresh.
For engineers reviewing the R1RP0408DGE-2PI#B0 datasheet, R1RP0408DGE-2PI#B0 pinout, R1RP0408DGE-2PI#B0 application, or R1RP0408DGE-2PI#B0 equivalent, key selection criteria include TTL-compatible I/O drive, center VCC/VSS pinout for noise immunity, low 5 mA CMOS standby current, and SOJ-36 package compatibility with legacy board layouts.
Technical Context
This SRAM implements a 6-transistor memory cell architecture with fully static operation-no clock, timing strobe, or refresh required. Its block structure comprises 1024 rows × 32 columns × 16 blocks × 8 bits (4,194,304 total bits), supported by independent row/column decoders and an internal voltage generator.
Control logic uses active-low chip select (CS#), output enable (OE#), and write enable (WE#) with overlapping timing windows for write cycles. The device guarantees equal access and cycle times (12 ns), supports direct TTL interfacing on all pins, and provides two standby current modes: 40 mA (TTL) and 5 mA (CMOS).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory capacity | 4 Mbit (512-kword × 8-bit) - supports byte-wide data paths without external multiplexing |
| Access time | 12 ns max - enables integration into 80 MHz CPU bus interfaces with zero wait states |
| Supply voltage | 5.0 V ±10% - compatible with standard TTL/CMOS logic rails and legacy 5 V system designs |
| Operating temperature | −40 to +85°C - qualified for industrial-grade embedded applications including factory automation and telecom infrastructure |
| Standby current | 5 mA (CMOS mode) - reduces power in idle states for energy-sensitive buffer applications |
| Pin count & package | 36-pin plastic SOJ (400-mil) - matches JEDEC MS-022AC footprint for drop-in replacement in existing SOJ sockets |
| I/O compatibility | TTL-compatible inputs/outputs - eliminates level-shifting circuitry when interfacing with 5 V microcontrollers or FPGAs |
Pinout & Package
Package: 400-mil 36-pin plastic SOJ (36P0K), center VCC/VSS configuration for improved power integrity and reduced ground bounce.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address input | 19-bit address bus supporting full 512-kword decoding; A0 = LSB, A18 = MSB |
| I/O1–I/O8 | Data input/output | Bi-directional 8-bit data bus with TTL-compatible drive strength (VOH ≥ 2.4 V @ −4 mA, VOL ≤ 0.4 V @ 8 mA) |
| CS# | Chip select | Active-low enable controlling device activation; must be stable before address or control transitions |
| OE# | Output enable | Active-low control for output buffer; allows read data to appear on I/O pins only when CS# and OE# are both low |
| WE# | Write enable | Active-low signal initiating write cycles; combined with CS# to define valid write window per AC timing specs |
| VCC | Power supply | Primary 5 V supply; dual VCC pins (pins 9 and 28) reduce IR drop and improve noise margin |
| VSS | Ground | Reference ground; dual VSS pins (pins 10 and 27) enhance return path integrity and EMI performance |
| NC | No connection | Pins 19 and 36 are unconnected; must remain floating-no external tie or routing |
Key Features
| Feature | Design Value |
|---|---|
| Fully static operation | No clock, no refresh, no timing strobes required-simplifies timing-critical control logic design |
| Equal access and cycle times | 12 ns tRC = tAA ensures deterministic bus timing for real-time systems without variable latency penalties |
| Center VCC/VSS pinout | Dual VCC (pins 9, 28) and dual VSS (pins 10, 27) minimize power distribution impedance and suppress simultaneous switching noise |
| Low CMOS standby current | 5 mA ISB1 at f = 0 MHz enables ultra-low-power hold mode during processor sleep or system suspend |
| TTL-compatible I/O | Direct interface with 5 V microcontrollers, CPLDs, and legacy logic families-no level translators needed |
Applications
| Industrial PLC Data Buffer | Legacy Telecom Line Card Cache |
|---|---|
Use Scenario: Storing real-time I/O status and configuration registers in programmable logic controllers with deterministic scan cycles. IC Role / Device Role / Timing Role: High-speed static RAM providing zero-wait-state read/write access to volatile process data during 10–50 ms scan intervals. Use Value: 12 ns access time ensures full register read/write completion within one CPU bus cycle, eliminating pipeline stalls in deterministic control loops. |
Use Scenario: Acting as packet buffer memory in TDM-based voice line cards where bursty traffic requires temporary frame storage before switching. IC Role / Device Role / Timing Role: Byte-wide SRAM serving as FIFO buffer between serial framers and backplane interface ASICs operating at 5 V. Use Value: TTL-compatible I/O and 5 mA CMOS standby current reduce BOM count and lower idle power in always-on telecom infrastructure. |
| Medical Imaging Control Module | Automotive Engine Control Unit (ECU) Diagnostics Buffer |
Use Scenario: Holding calibration tables and real-time sensor fusion results in portable ultrasound or X-ray control subsystems. IC Role / Device Role / Timing Role: Non-refreshing memory storing critical runtime parameters across power cycles via backup supply retention. Use Value: −40 to +85°C rating and 5.0 V operation ensure reliable function in thermally constrained medical enclosures without thermal derating. |
Use Scenario: Caching diagnostic trouble codes (DTCs), sensor history, and flash programming buffers in engine management ECUs. IC Role / Device Role / Timing Role: Fast-access scratchpad memory used during OBD-II protocol handshaking and firmware update staging. Use Value: SOJ-36 package and industrial temp grade support rework-friendly assembly and long-term reliability in under-hood environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IS61LV25616AL-12TQLI | 256K × 16-bit (4 Mbit), 3.3 V supply, 12 ns access, 44-pin TSOP-II | Requires level shifting for 5 V systems; higher pin count increases PCB area and routing complexity | Select when migrating to 3.3 V systems or needing 16-bit data bus width |
| AS6C4008-12ZIN | 512K × 8-bit (4 Mbit), 5 V supply, 12 ns access, 32-pin SOJ | 32-pin SOJ vs. 36-pin SOJ - incompatible footprint; lacks dual VCC/VSS layout | Consider only if board redesign accommodates different pinout and revised power delivery |
Compared with IS61LV25616AL-12TQLI and AS6C4008-12ZIN, the R1RP0408DGE-2PI#B0 uniquely combines 5 V operation, 36-pin SOJ with center VCC/VSS, and industrial temperature range-making it the sole option for drop-in replacement in legacy 5 V systems requiring minimal layout change and proven thermal robustness.
Availability
R1RP0408DGE-2PI#B0 is available at Aetrix Electronics and suitable for industrial PLC data buffering, legacy telecom line card caching, medical imaging control modules, and automotive ECU diagnostics requiring stable component supply across extended product lifecycles.
Supply support for R1RP0408DGE-2PI#B0 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and memory solutions for industrial, automotive, and enterprise applications.
The R1RP0408DI Series was designed specifically for high-speed, wide-bit-width buffer and cache roles in 5 V embedded systems where full static operation, industrial temperature tolerance, and SOJ-36 compatibility are mandatory.
FAQ
What is the maximum operating frequency supported by the R1RP0408DGE-2PI#B0?
The R1RP0408DGE-2PI#B0 does not operate on a clock signal-it is a fully static RAM with no internal clock. Its 12 ns access time supports bus frequencies up to approximately 83 MHz (1/12 ns) in zero-wait-state configurations. System-level timing depends on controller setup/hold margins and board trace delays, but the R1RP0408DGE-2PI#B0 itself imposes no frequency ceiling beyond its guaranteed AC specifications.
Does the R1RP0408DGE-2PI#B0 require refresh circuitry?
No, the R1RP0408DGE-2PI#B0 is a true static RAM using 6-transistor memory cells and requires no refresh cycles. It retains data indefinitely as long as VCC is maintained within specification (5.0 V ±10%) and ambient temperature remains within −40 to +85°C. This eliminates refresh overhead in microcontroller or FPGA-based systems and simplifies power management.
Can the R1RP0408DGE-2PI#B0 be used with 3.3 V logic interfaces?
The R1RP0408DGE-2PI#B0 is specified only for 5.0 V ±10% operation and TTL-compatible I/O thresholds. Direct connection to 3.3 V logic risks violating VIH/VIL limits and may cause unreliable reads/writes. If interfacing with 3.3 V controllers is required, level-shifting circuitry must be added-however, the R1RP0408DGE-2PI#B0 itself does not support mixed-voltage operation.
What is the meaning of "-2PI" in the R1RP0408DGE-2PI#B0 part number?
The "-2PI" suffix in R1RP0408DGE-2PI#B0 denotes the speed grade (12 ns access time) and package type (plastic SOJ). "2" indicates 12 ns max access time; "P" stands for plastic SOJ; "I" specifies the industrial temperature range (−40 to +85°C). The "#B0" suffix reflects Renesas' internal revision and tape-and-reel packaging variant.
How does the center VCC/VSS pinout of the R1RP0408DGE-2PI#B0 improve system reliability?
The center VCC/VSS pinout (VCC on pins 9 and 28, VSS on pins 10 and 27) minimizes power distribution inductance and provides symmetrical return paths. This reduces ground bounce during simultaneous I/O switching, improves noise immunity in electrically noisy industrial environments, and enhances signal integrity for high-speed 12 ns accesses-directly contributing to stable operation in PLCs and telecom line cards.
R1RP0408DGE-2PI#B0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 36-BSOJ (0.400", 10.16mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM
- Memory Size:
- 4Mbit
- Memory Organization:
- 512K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 12ns
- Access Time:
- 12 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 36-SOJ
R1RP0408DGE-2PI#B0 FAQ
1.How can I place an order for R1RP0408DGE-2PI#B0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1RP0408DGE-2PI#B0 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for R1RP0408DGE-2PI#B0 reliable?
The price and inventory of R1RP0408DGE-2PI#B0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R1RP0408DGE-2PI#B0 is usually 5 days.
3.What payment methods are accepted for R1RP0408DGE-2PI#B0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1RP0408DGE-2PI#B0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R1RP0408DGE-2PI#B0?
R1RP0408DGE-2PI#B0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R1RP0408DGE-2PI#B0 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for R1RP0408DGE-2PI#B0?
For technical support, including R1RP0408DGE-2PI#B0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1RP0408DGE-2PI#B0 requirements.
6.How does Aetrix verify that R1RP0408DGE-2PI#B0 is sourced from the original manufacturer or authorized distributors?
All R1RP0408DGE-2PI#B0 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that R1RP0408DGE-2PI#B0 meets industry standards.
7.What is the process for return or replacement of R1RP0408DGE-2PI#B0?
All R1RP0408DGE-2PI#B0 units undergo pre-shipment inspection (PSI). If there is an issue with R1RP0408DGE-2PI#B0, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The R1RP0408DGE-2PI#B0 part is unused and in its original packaging.
Return procedure for R1RP0408DGE-2PI#B0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R1RP0408DGE-2PI#B0 Tags
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