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Renesas 70V658S12BFI8
- Part No.:
- 70V658S12BFI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 208-LFBGA
- Datasheet:
-
70V658S12BFI8.pdf
- Description:
- IC SRAM 2MBIT PARALLEL 208CABGA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
70V658S12BFI8 from IDT is a high-speed 64K × 36 asynchronous dual-port static RAM with independent left/right ports, 12 ns maximum access time (commercial grade), LVTTL-compatible 3.3 V core supply, and selectable 3.3 V/2.5 V I/O voltage per port via OPT pins - used in real-time inter-processor communication buffers and FPGA co-processor memory interfaces.
For engineers reviewing the 70V658S12BFI8 datasheet, 70V658S12BFI8 pinout, 70V658S12BFI8 application, or 70V658S12BFI8 equivalent, key selection criteria include simultaneous dual-port read/write capability, on-chip semaphore arbitration, JTAG IEEE 1149.1 compliance, BUSY flag behavior in Master/Slave configurations, and 208-pin PQFP package compatibility with industrial temperature support.
Technical Context
This device implements true dual-port SRAM architecture with fully asynchronous operation on both ports, enabling concurrent access to the same memory location without external arbitration logic. It integrates dedicated semaphore logic, interrupt flags (INTL/INTR), and BUSY signaling with configurable Master/Slave (M/S) mode for system-level resource coordination.
Each port supports independent chip enables (CE0/CE1), byte enables (BE0–BE3 for 9-bit bytes), output enables (OEL/OER), and read/write controls (R/WL/R/WR). The OPTL/OPTR pins configure per-port I/O voltage (3.3 V or 2.5 V), while VDD remains fixed at 3.3 V ±150 mV for the core.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 64K × 36 bits (2.25 Mbit total); supports depth expansion using dual CE inputs without external logic |
| Access Time (tAA) | 12 ns max - guarantees deterministic latency for real-time control loops and high-throughput data streaming |
| Operating Voltage | VDD = 3.3 V ±150 mV (core); VDDQL/VDDQR = 3.3 V ±150 mV or 2.5 V ±100 mV (I/Os, selected per port by OPTL/OPTR) |
| Temperature Range | –40°C to +85°C (industrial grade) - validated for embedded systems in harsh environments |
| JTAG Support | IEEE 1149.1 compliant (TCK, TMS, TDI, TDO, TRST) - enables boundary-scan testing and in-system debug |
| Power Consumption | ISB3 = 6 mA max (full standby, CMOS inputs); IDD = 490 mA max (dynamic, both ports active at fMAX) |
| Package | 208-pin Plastic Quad Flatpack (PQFP), 28 mm × 28 mm × 3.5 mm body - compatible with standard SMT reflow profiles |
Pinout & Package
208-pin PQFP package (DR208/DRG208), body size 28 mm × 28 mm × 3.5 mm; lead pitch 0.65 mm; RoHS-compliant green variant available.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A16L(1) | Left port address inputs | A16L is no-connect for 70V658; A0L–A15L select 64K addresses (216 = 65,536) |
| I/O0L–I/O35L | Left port bidirectional data bus | 36-bit wide interface; BE0L–BE3L enable 9-bit byte writes independently |
| CE0L, CE1L | Left port chip enables | Dual CE allows depth expansion; CE0L = VIL & CE1L = VIH enables left port |
| R/WL, OEL | Left port control signals | R/WL = VIL initiates write; OEL = VIL enables outputs during read |
| SEML, INTL, BUSYL | Left port arbitration signals | SEML enables semaphore access; INTL is totem-pole interrupt flag; BUSYL is totem-pole busy flag (Master output / Slave input) |
| M/S | Master/Slave configuration | M/S = VIH configures device as Master (BUSY output); M/S = VIL configures as Slave (BUSY input) |
| OPTL, VDDQL | Left port I/O voltage selector | OPTL = VDD → VDDQL = 3.3 V; OPTL = VSS → VDDQL = 2.5 V - sets I/O logic levels and drive strength |
| VDD, VSS | Power and ground | All VDD pins must be tied to 3.3 V; all VSS pins to ground - decoupling required per datasheet layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port architecture | Simultaneous independent read/write to identical memory locations - eliminates software locks and reduces inter-processor latency |
| On-chip semaphore logic | Eight hardware semaphore flags accessible via A0–A2 and I/O0–I/O35 - enables atomic resource sharing between CPUs/FPGAs without external logic |
| Configurable I/O voltage per port | Independent 3.3 V/2.5 V operation on left/right ports via OPTL/OPTR - simplifies interfacing with mixed-voltage SoCs and FPGAs |
| Master/Slave BUSY arbitration | BUSY flag asserts when contention occurs; M/S pin defines direction - ensures deterministic resolution of simultaneous accesses |
| JTAG boundary-scan testability | Fully compliant IEEE 1149.1 interface with TAP controller - supports production test, debug, and in-field diagnostics |
Applications
| High-Speed Inter-Processor Communication | FPGA Co-Processor Memory Buffer |
|---|---|
Use Scenario: Two microcontrollers exchange sensor fusion data and control commands in real time with zero software overhead. IC Role / Device Role / Timing Role: Dual-port SRAM acts as shared memory buffer; left port connects to MCU-A, right port to MCU-B; BUSY flag prevents race conditions during concurrent access. Use Value: Eliminates polling or interrupt-driven synchronization; 12 ns access enables sub-microsecond data handoff between processors. | Use Scenario: An FPGA offloads image processing tasks while an ARM processor manages I/O and system control. IC Role / Device Role / Timing Role: 70V658S12BFI8 serves as low-latency frame buffer; FPGA writes processed frames to one port, ARM reads results from the other - fully asynchronous operation avoids pipeline stalls. Use Value: 36-bit width matches common pixel data buses; per-port I/O voltage selection allows FPGA I/O banks (2.5 V) and ARM interface (3.3 V) to connect directly. |
| Real-Time Industrial PLC Memory | Telecom Line Card Packet Buffer |
Use Scenario: Programmable Logic Controller requires deterministic response to fieldbus interrupts and cyclic I/O updates. IC Role / Device Role / Timing Role: Left port handles real-time task data (motion control buffers), right port handles non-real-time HMI and diagnostics - isolated timing domains prevent jitter. Use Value: Industrial temperature rating (–40°C to +85°C) ensures reliability in cabinet-mounted controllers; ISB3 < 6 mA minimizes thermal load during idle cycles. | Use Scenario: Line card in carrier-grade switch buffers packets between ingress and egress ASICs operating at different clock domains. IC Role / Device Role / Timing Role: Acts as elastic buffer with independent clock domains on each port; semaphore logic coordinates packet ownership between ASICs. Use Value: JTAG support enables field-upgradable firmware and post-deployment validation; 208-pin PQFP provides mechanical robustness for high-vibration telecom chassis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C1362BV33-12BGXI | 64K × 36, 12 ns, 3.3 V only (no 2.5 V I/O option), 256-ball BGA package | Lacks per-port I/O voltage flexibility; requires redesign for mixed-voltage systems | Select when board space is constrained and BGA assembly is available; avoid if 2.5 V interface to FPGA is required. |
| IDT70V659S12BFI8 | 128K × 36 (2× memory depth), same pinout and timing, identical feature set | Provides double memory capacity without layout change - ideal for future-proofing or higher-bandwidth applications | Drop-in upgrade path; verify system address decoding supports extended A16 address line (active on 70V659, NC on 70V658). |
Compared with CY7C1362BV33-12BGXI, 70V658S12BFI8 offers flexible I/O voltage per port and PQFP packaging for easier prototyping; compared with IDT70V659S12BFI8, it delivers optimized cost and power for 64K-depth applications without unused memory overhead.
Availability
70V658S12BFI8 is available at Aetrix Electronics and suitable for high-reliability industrial control, telecommunications infrastructure, and FPGA-based embedded systems requiring stable component supply across long product lifecycles.
Supply support for 70V658S12BFI8 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
IDT (Integrated Device Technology) is a semiconductor company specializing in timing, memory interface, RF, and sensor solutions, now part of Renesas Electronics.
The IDT70V658 belongs to the 70V659/58/57 family of high-speed asynchronous dual-port SRAMs designed for deterministic, low-latency inter-processor communication in real-time embedded systems.
FAQ
What is the memory organization and density of the 70V658S12BFI8?
The 70V658S12BFI8 is organized as 64K × 36 bits, delivering 2.25 Mbit of true dual-port SRAM. This configuration supports 65,536 unique addresses with 36-bit-wide data paths on both left and right ports. The device uses A0L–A15L and A0R–A15R for addressing; A16L and A16R are no-connect pins specific to the 70V658S12BFI8 variant.
How does the Master/Slave (M/S) pin affect BUSY signal behavior in the 70V658S12BFI8?
When M/S = VIH, the 70V658S12BFI8 operates as a Master and drives BUSYL/BUSYR as totem-pole outputs that assert during port contention. When M/S = VIL, it operates as a Slave and accepts BUSYL/BUSYR as inputs to inhibit writes. This configuration enables hierarchical arbitration in multi-device systems - critical for deterministic access control in real-time applications using the 70V658S12BFI8.
Can the left and right ports of the 70V658S12BFI8 operate at different I/O voltages simultaneously?
Yes. The 70V658S12BFI8 supports independent I/O voltage selection per port: OPTL sets left-port I/O levels (3.3 V or 2.5 V), and OPTR sets right-port levels. VDDQL and VDDQR must be supplied accordingly. This allows the 70V658S12BFI8 to interface directly with heterogeneous systems - for example, a 2.5 V FPGA on the right port and a 3.3 V microcontroller on the left port - without level-shifting circuitry.
What is the role of the semaphore logic in the 70V658S12BFI8, and how is it accessed?
The 70V658S12BFI8 integrates eight hardware semaphore flags accessible via address lines A0–A2 and data lines I/O0–I/O35. Semaphore access requires CE = VIH and SEM = VIL (opposite of RAM access). This dedicated mechanism enables atomic resource locking between processors - for instance, ensuring exclusive access to a shared peripheral register - without software intervention or external arbitration logic in systems using the 70V658S12BFI8.
Does the 70V658S12BFI8 support JTAG boundary-scan, and which pins are used?
Yes, the 70V658S12BFI8 fully complies with IEEE 1149.1 JTAG boundary-scan. Pins TDI (pin 1), TDO (pin 2), TCK (pin 3), TMS (pin 4), and TRST (pin 5) implement the test access port. These pins enable production testing, in-circuit debugging, and verification of PCB interconnect integrity - essential for high-availability systems where the 70V658S12BFI8 is deployed.
70V658S12BFI8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 208-LFBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Asynchronous
- Memory Size:
- 2Mbit
- Memory Organization:
- 64K x 36
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 12ns
- Access Time:
- 12 ns
- Voltage - Supply:
- 3.15V ~ 3.45V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 208-CABGA (15x15)
70V658S12BFI8 FAQ
1.How can I place an order for 70V658S12BFI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 70V658S12BFI8 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 70V658S12BFI8 reliable?
The price and inventory of 70V658S12BFI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V658S12BFI8 is usually 5 days.
3.What payment methods are accepted for 70V658S12BFI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V658S12BFI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 70V658S12BFI8?
70V658S12BFI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 70V658S12BFI8 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 70V658S12BFI8?
For technical support, including 70V658S12BFI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V658S12BFI8 requirements.
6.How does Aetrix verify that 70V658S12BFI8 is sourced from the original manufacturer or authorized distributors?
All 70V658S12BFI8 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 70V658S12BFI8 meets industry standards.
7.What is the process for return or replacement of 70V658S12BFI8?
All 70V658S12BFI8 units undergo pre-shipment inspection (PSI). If there is an issue with 70V658S12BFI8, 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 70V658S12BFI8 part is unused and in its original packaging.
Return procedure for 70V658S12BFI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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