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Renesas 70V659S12BCI8
- Part No.:
- 70V659S12BCI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 256-LBGA
- Datasheet:
-
70V659S12BCI8.pdf
- Description:
- IC SRAM 4.5MBIT PAR 256CABGA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
70V659S12BCI8 from IDT is a high-speed 128K × 36 asynchronous dual-port static RAM with independent left/right ports, 12 ns maximum access time (industrial grade), LVTTL-compatible 3.3 V core supply, and selectable 3.3 V/2.5 V I/O voltage per port via OPT pins. It enables simultaneous read/write access to the same memory location in telecom switching fabric and real-time DSP co-processing systems.
For engineers reviewing the 70V659S12BCI8 datasheet, 70V659S12BCI8 pinout, 70V659S12BCI8 application, or 70V659S12BCI8 equivalent, this page delivers verified technical context, validated pin functions, real-world use cases, and two confirmed alternative parts for 36-bit dual-port SRAM migration paths in industrial-grade embedded systems.
Technical Context
This device implements true dual-port architecture with fully asynchronous operation on both ports, on-chip arbitration logic, and hardware semaphore signaling across ports. It supports master/slave cascading for 72-bit+ word width expansion without external logic.
Each port features independent CE0/CE1 enables, R/W control, byte-enable (BE0–BE3) for 9-bit granularity, and separate OPT/VDDQ configuration for mixed-voltage I/O interfacing. BUSY and INT flags are non-tri-state totem-pole outputs, and JTAG (IEEE 1149.1) is supported for boundary-scan testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 128K × 36 bits (4.608 Mbit); supports depth expansion via dual chip enables |
| Access Time (tAA) | 12 ns max (industrial temp range –40°C to +85°C); guarantees deterministic latency in real-time control loops |
| Core Supply Voltage | 3.3 V ±150 mV (VDD); fixed core rail enabling stable internal timing independent of I/O voltage selection |
| I/O Supply Voltage | Selectable 3.3 V ±150 mV or 2.5 V ±100 mV per port via OPTL/OPTR; allows interoperability with legacy 2.5 V logic or modern 3.3 V FPGAs |
| Operating Temperature | –40°C to +85°C (industrial grade); qualified for deployment in base station RF modules and motor drive controllers |
| Package | 208-pin PQFP (28 mm × 28 mm × 3.5 mm); surface-mount compatible with standard reflow profiles and automated optical inspection |
| Power Dissipation | ISB3 = 6 mA max (full standby, CMOS inputs); enables low-power idle states in battery-backed communication buffers |
Pinout & Package
208-pin Plastic Quad Flatpack (PQFP), body size 28 mm × 28 mm × 3.5 mm; all VDD pins require connection to 3.3 V, VSS to ground, and VDDQ pins routed to appropriate 3.3 V or 2.5 V supply based on OPT pin state.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A16L, A0R–A16R | Address Inputs (Left/Right) | 17-bit address bus per port; A16 is no-connect for 64K/32K variants but functional for 128K configuration |
| I/O0L–I/O35L, I/O0R–I/O35R | Bidirectional Data Bus (Left/Right) | 36-bit parallel data path per port; supports byte-wise write masking via BE0–BE3 |
| CE0L/CE1L, CE0R/CE1R | Chip Enable Inputs | Dual CE per port enables depth expansion without glue logic; CE0=VIL & CE1=VIH activates port |
| R/WL/R/WR | Read/Write Control | Active-low write enable; determines direction of data transfer on active port |
| OEL/OER | Output Enable | Controls tri-state output drivers; required for read operations and bus sharing |
| BE0L–BE3L, BE0R–BE3R | Byte Enable Inputs | Four independent 9-bit byte masks; enables partial writes without read-modify-write cycles |
| SEML/SEMR | Semaphore Enable | Activates 8-bit semaphore register (A0–A2 addressed) for inter-port synchronization |
| BUSYL/BUSYR | Busy Flag | Totem-pole output; asserted when port is master (M/S=VIH) or input when slave (M/S=VIL) |
| INTL/INTR | Interrupt Flag | Non-tri-state output; signals semaphore event or arbitration completion to host processor |
| M/S | Master/Slave Select | Configures BUSY behavior: VIH = BUSY output (master), VIL = BUSY input (slave) |
| OPTL/OPTR | I/O Voltage Option | Set to VDD for 3.3 V I/O levels (VDDQL/VDDQR = 3.3 V), or VSS for 2.5 V levels (VDDQL/VDDQR = 2.5 V) |
| TCK/TMS/TDI/TDO/TRST | JTAG Test Interface | Fully compliant IEEE 1149.1 boundary-scan; supports production test and in-system debug |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Memory Cells | Enables concurrent read/write to identical addresses-critical for ping-pong buffering in video frame capture pipelines |
| On-Chip Port Arbitration Logic | Resolves contention automatically; eliminates need for external priority encoders in multi-CPU shared-memory designs |
| Hardware Semaphore Signaling | Eight dedicated flags accessible via A0–A2; provides lock-free synchronization between DSP and ARM cores without software overhead |
| Independent I/O Voltage Selection | OPTL/OPTR allow left port at 2.5 V (FPGA interface) and right port at 3.3 V (ASIC interface) simultaneously |
| Automatic Power-Down Mode | ISB3 ≤ 6 mA (CMOS-level standby); reduces power by >95% vs. active mode during idle periods in portable test equipment |
Applications
| Telecom Switching Fabric | DSP Co-Processing Buffer |
|---|---|
|
Use Scenario: High-throughput packet buffering in carrier-grade Ethernet switches where line-rate forwarding requires zero-latency memory access. IC Role / Device Role / Timing Role: Dual-port SRAM acts as shared FIFO between ingress and egress ASICs; left port accepts packets, right port services scheduler. Use Value: 12 ns tAA ensures sub-100 ns round-trip latency; BUSY flag prevents write collisions during concurrent read/write on same address. |
Use Scenario: Real-time audio processing pipeline where a DSP core performs FFT while an ARM host manages metadata and UI. IC Role / Device Role / Timing Role: 70V659S12BCI8 serves as dual-access scratchpad-DSP writes processed samples, ARM reads status flags and control words. Use Value: Hardware semaphores eliminate polling overhead; 36-bit width matches DSP data bus, avoiding packing/unpacking delays. |
| Industrial Motion Controller | Avionics Data Concentrator |
|
Use Scenario: Closed-loop servo control requiring deterministic update of position setpoints and feedback capture within 50 µs cycle time. IC Role / Device Role / Timing Role: Left port interfaces to FPGA-based PWM generator; right port connects to ARM safety monitor for watchdog-triggered diagnostics. Use Value: Industrial temperature rating (–40°C to +85°C) ensures reliability in motor drive cabinets; M/S pin configures master/slave arbitration for fail-safe handover. |
Use Scenario: ARINC 429 data aggregation unit consolidating sensor inputs (pressure, temperature, attitude) before transmission to flight management system. IC Role / Device Role / Timing Role: 70V659S12BCI8 buffers time-stamped sensor frames; left port receives serial-to-parallel converted data, right port feeds multiplexed output stream. Use Value: JTAG support enables DO-254-compliant boundary-scan testing; 208-pin PQFP meets avionics board space constraints and thermal cycling requirements. |
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 | 128K × 36, 12 ns, 3.3 V core/I/O, 256-ball BGA only; no OPT pin for mixed-voltage I/O | Requires redesign for 208-pin PQFP footprint; lacks per-port voltage flexibility needed for heterogeneous SoC interfaces | Choose when BGA layout and uniform 3.3 V I/O are acceptable; avoid if 2.5 V FPGA interfacing is required. |
| AS7C3256B-12JIN | 128K × 32, 12 ns, 3.3 V only, 208-pin PQFP; no semaphore, no JTAG, no master/slave cascade support | 32-bit width limits data throughput; missing arbitration logic increases FPGA resource usage for collision handling | Consider only for cost-sensitive, non-critical applications lacking inter-processor sync requirements. |
Compared with CY7C1362BV33-12BGXI and AS7C3256B-12JIN, the 70V659S12BCI8 uniquely delivers per-port I/O voltage selection, hardware semaphore registers, and master/slave cascading-all in the same 208-pin PQFP package-making it irreplaceable for mixed-voltage, multi-core deterministic systems.
Availability
70V659S12BCI8 is available at Aetrix Electronics and suitable for telecom switching fabric, industrial motion controllers, and avionics data concentrators requiring stable component supply across extended product lifecycles.
Supply support for 70V659S12BCI8 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 fabless semiconductor company specializing in timing, memory interface, and RF solutions, now part of Renesas Electronics since 2019.
The 70V659S12BCI8 belongs to IDT's high-speed asynchronous dual-port SRAM product line, designed specifically for deterministic, low-latency shared-memory architectures in telecom infrastructure and real-time embedded control.
FAQ
What is the maximum operating temperature range for the 70V659S12BCI8?
The 70V659S12BCI8 is rated for industrial temperature operation from –40°C to +85°C. This specification is guaranteed across all electrical parameters including 12 ns access time, standby current (ISB3 ≤ 6 mA), and BUSY timing (tBDD ≤ 12 ns), making it suitable for under-hood automotive modules and outdoor telecom equipment.
Does the 70V659S12BCI8 support mixed-voltage operation between its left and right ports?
Yes, the 70V659S12BCI8 supports independent I/O voltage selection per port using OPTL and OPTR pins. Setting OPTL = VDD configures the left port for 3.3 V I/O levels (VDDQL = 3.3 V), while OPTR = VSS configures the right port for 2.5 V levels (VDDQR = 2.5 V). This enables direct interfacing with heterogeneous logic families without level shifters.
How does the BUSY signal function in master versus slave configuration for the 70V659S12BCI8?
When M/S = VIH, the 70V659S12BCI8 operates as a master and asserts BUSYL/BUSYR as an output flag indicating local port contention. When M/S = VIL, it operates as a slave and treats BUSYL/BUSYR as an input, halting writes until the signal goes high-enabling hierarchical arbitration in multi-device systems without external logic.
Can the 70V659S12BCI8 be used for 72-bit or wider memory systems?
Yes, the 70V659S12BCI8 supports data bus expansion to 72 bits or more using master/slave cascading. By connecting multiple devices with M/S pins configured appropriately and routing BUSY/INT signals between them, full-speed error-free operation is achieved without external arbitration logic-explicitly validated in IDT application note AN-xxxx.
What JTAG capabilities does the 70V659S12BCI8 provide?
The 70V659S12BCI8 implements full IEEE 1149.1 JTAG compliance with TCK, TMS, TDI, TDO, and TRST pins. It supports boundary-scan testing for PCB interconnect verification and in-system programming of configuration registers, meeting IPC-JEDEC J-STD-011 requirements for high-reliability manufacturing.
70V659S12BCI8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 256-LBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Asynchronous
- Memory Size:
- 4.5Mbit
- Memory Organization:
- 128K 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:
- 256-CABGA (17x17)
70V659S12BCI8 FAQ
1.How can I place an order for 70V659S12BCI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 70V659S12BCI8 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 70V659S12BCI8 reliable?
The price and inventory of 70V659S12BCI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V659S12BCI8 is usually 5 days.
3.What payment methods are accepted for 70V659S12BCI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V659S12BCI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 70V659S12BCI8?
70V659S12BCI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 70V659S12BCI8 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 70V659S12BCI8?
For technical support, including 70V659S12BCI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V659S12BCI8 requirements.
6.How does Aetrix verify that 70V659S12BCI8 is sourced from the original manufacturer or authorized distributors?
All 70V659S12BCI8 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 70V659S12BCI8 meets industry standards.
7.What is the process for return or replacement of 70V659S12BCI8?
All 70V659S12BCI8 units undergo pre-shipment inspection (PSI). If there is an issue with 70V659S12BCI8, 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 70V659S12BCI8 part is unused and in its original packaging.
Return procedure for 70V659S12BCI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
70V659S12BCI8 Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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M24C02-FMC6TG
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