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Renesas 70V659S12DRGI
- Part No.:
- 70V659S12DRGI
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 208-BFQFP
- Datasheet:
-
70V659S12DRGI.pdf
- Description:
- IC SRAM 4.5MBIT PARALLEL 208PQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
70V659S12DRGI from IDT (now Renesas) is a high-speed, asynchronous dual-port static RAM with 128K × 36-bit organization (4.608 Mbit), supporting simultaneous independent access from left and right ports, 12 ns max access time (industrial grade), LVTTL-compatible I/Os, and on-chip semaphore arbitration - used in real-time inter-processor communication, FPGA co-processing buffers, and telecom packet buffering.
For engineers reviewing the 70V659S12DRGI datasheet, 70V659S12DRGI pinout, 70V659S12DRGI application, or 70V659S12DRGI equivalent, this page delivers verified technical context, validated pin functions, true dual-port timing behavior, industrial-grade thermal specs (–40°C to +85°C), and precise alternative part guidance for memory subsystem design.
Technical Context
The 70V659S12DRGI implements fully asynchronous dual-port architecture with independent address, control, and bidirectional I/O buses per port (36-bit wide each), enabling concurrent read/write operations to the same memory location without external arbitration logic. Its on-chip port arbitration logic resolves contention via BUSY flag assertion and supports MASTER/SLAVE cascading for 72-bit+ word systems.
Each port features selectable I/O voltage (3.3 V or 2.5 V via OPTL/OPTR pins), separate byte enables (BE0–BE3 per port), JTAG IEEE 1149.1 compliance, and hardware semaphore signaling across eight flags addressed by A0–A2. The device uses true dual-port SRAM cells - not pseudo-dual-port or FIFO-based emulation - ensuring deterministic latency and no internal pipelining.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 128K × 36 bits (4.608 Mbit); supports depth expansion via dual CE inputs and data-width expansion via Master/Slave mode |
| Access Time (tAA) | 12 ns max (industrial grade); guarantees full-speed operation at 83 MHz read cycle rate without wait states |
| I/O Voltage Support | Selectable 3.3 V (±150 mV) or 2.5 V (±100 mV) per port via OPTL/OPTR; enables mixed-voltage system interfacing |
| Operating Temperature | –40°C to +85°C; qualified for industrial embedded applications including baseband processing and motor control |
| Power Supply | VDD = 3.3 V ±150 mV (core only); VDDQL/VDDQR independently set per port based on OPT pin state |
| Arbitration Logic | On-chip semaphore and BUSY flag generation; eliminates need for external glue logic in multi-CPU shared-memory designs |
| JTAG Compliance | Fully compliant with IEEE 1149.1; supports boundary-scan testing of interconnects in high-density PCB layouts |
Pinout & Package
70V659S12DRGI is packaged in a 208-pin Plastic Quad Flatpack (PQFP), body size ≈ 28 mm × 28 mm × 3.5 mm, with 0.5 mm lead pitch. All VDD pins require 3.3 V connection; VDDQL/VDDQR must match selected I/O voltage (3.3 V or 2.5 V) per port; all VSS pins must be grounded.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE0L / CE0R | Chip Enable 0 (Left/Right) | Primary enable for port access; CE0X = VIL and CE1X = VIH required for valid memory access |
| R/WL / R/WR | Read/Write Control (Left/Right) | Active-low write enable; determines direction of data transfer on respective port's I/O bus |
| A0L–A16L / A0R–A16R | Address Inputs (Left/Right) | 17-bit address bus per port; A16 is NC for 64K/32K configurations (per datasheet note) |
| I/O0L–I/O35L / I/O0R–I/O35R | Bidirectional Data (Left/Right) | 36-bit parallel I/O per port; byte-enabled via BE0–BE3 (9-bit granularity) |
| SEML / SEMR | Semaphore Enable (Left/Right) | Enables access to 8-bit semaphore register (addressed by A0–A2); used for inter-port synchronization |
| BUSYL / BUSYR | Busy Flag (Left/Right) | Output when M/S = VIH (Master); input when M/S = VIL (Slave); indicates port contention during simultaneous access |
| M/S | Master/Slave Select | Configures device role: VIH → BUSY output (Master), VIL → BUSY input (Slave); enables cascaded multi-device systems |
| OPTL / OPTR | I/O Voltage Option (Left/Right) | VIH → 3.3 V I/O mode (VDDQX = 3.3 V); VIL → 2.5 V I/O mode (VDDQX = 2.5 V); independent per port |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Simultaneous independent read/write to identical addresses without conflict or arbitration delay - critical for lock-free IPC |
| Hardware Semaphore Logic | Eight dedicated flags accessible via A0–A2; enables atomic test-and-set operations between processors without software overhead |
| Asynchronous Operation | No clock required; timing governed solely by setup/hold and access parameters - simplifies integration with async logic or legacy buses |
| Flexible I/O Voltage per Port | Independent 3.3 V/2.5 V selection allows interfacing with mixed-voltage SoCs, FPGAs, or ASICs without level shifters |
| Depth & Width Expandability | Dual CE enables allow seamless depth expansion; Master/Slave mode supports 72-bit+ word systems using multiple devices |
| JTAG Boundary-Scan Support | Full IEEE 1149.1 compliance enables production testability and debug visibility in dense, high-reliability PCB assemblies |
Applications
| Telecom Packet Buffering | FPGA-CPU Co-Processing Interface |
|---|---|
|
Use Scenario: Storing incoming/outgoing Ethernet or TDM packets in real time while CPU performs header inspection and routing decisions. IC Role / Device Role / Timing Role: Dual-port SRAM acts as zero-wait-state shared buffer - left port connects to PHY/FPGA, right port to ARM Cortex-A processor. Use Value: 12 ns access ensures sub-100 ns round-trip latency for packet metadata exchange, enabling line-rate forwarding at 10 Gbps. |
Use Scenario: Offloading compute-intensive tasks (e.g., FFT, filtering) from an embedded CPU to an FPGA, with bidirectional parameter and result exchange. IC Role / Device Role / Timing Role: Acts as low-latency, deterministic memory bridge - FPGA writes results to one port while CPU reads from the other. Use Value: Hardware semaphore support enables atomic handshaking, eliminating race conditions during burst transfers without CPU polling. |
| Industrial Motion Controller Shared Memory | Multi-Core DSP Inter-Processor Communication |
|
Use Scenario: Synchronizing position commands and sensor feedback between real-time motion controller and safety PLC in servo drive systems. IC Role / Device Role / Timing Role: Dual-port RAM provides deterministic, interrupt-free data exchange; BUSY flag prevents overwrites during simultaneous access. Use Value: –40°C to +85°C rating and 12 ns timing ensure reliable operation in harsh factory environments with tight jitter budgets (< 5 ns). |
Use Scenario: Enabling cache-coherent data sharing between two SHARC or C6000 DSP cores executing parallel signal processing pipelines. IC Role / Device Role / Timing Role: Functions as shared scratchpad memory with hardware semaphore arbitration to coordinate task distribution and result aggregation. Use Value: On-chip arbitration eliminates need for external semaphores or custom logic, reducing BOM count and layout complexity in compact DSP modules. |
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, no JTAG, no per-port I/O voltage select, 256-ball BGA only | Lacks independent OPT-controlled I/O voltage per port; requires fixed 3.3 V interface on both sides | Choose when board space permits BGA and system uses uniform 3.3 V I/O; avoid if mixed-voltage interface needed. |
| AS7C312836B-12TCN | 128K × 36, 12 ns, 3.3 V core/I/O, no semaphore logic, no JTAG, PQFP-208 package | No hardware semaphore or BUSY arbitration; requires external logic for inter-processor sync | Choose only for cost-sensitive, single-processor auxiliary buffer roles where arbitration is handled in software or FPGA. |
Compared with CY7C1362BV33-12BGXI and AS7C312836B-12TCN, the 70V659S12DRGI uniquely delivers per-port I/O voltage flexibility, integrated semaphore registers, and JTAG testability - making it the only option among the three suitable for robust, mixed-voltage, multi-processor real-time systems requiring zero-software-arbitration latency.
Availability
70V659S12DRGI is available at Aetrix Electronics and suitable for telecom packet buffering, FPGA-CPU co-processing interfaces, and industrial motion controller shared memory requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for 70V659S12DRGI 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), now part of Renesas Electronics, is a fabless semiconductor company specializing in high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.
The 70V659S12DRGI belongs to IDT's high-speed asynchronous dual-port SRAM product line, designed specifically for deterministic, low-latency inter-processor communication in real-time embedded systems where software-managed memory coherency is unacceptable.
FAQ
What is the maximum operating temperature range for the 70V659S12DRGI?
The 70V659S12DRGI is rated for industrial temperature operation from –40°C to +85°C. This specification is guaranteed across all electrical parameters in the datasheet, including 12 ns access time, standby current (ISB1–ISB4), and BUSY timing (tBAA, tBDA). It is not rated for extended commercial (0°C to +70°C) or military ranges.
Does the 70V659S12DRGI support independent I/O voltage selection on left and right ports?
Yes, the 70V659S12DRGI supports independent I/O voltage selection per port via OPTL and OPTR pins. Setting OPTL = VIH configures the left port for 3.3 V I/O levels (with VDDQL = 3.3 V), while OPTL = VIL sets it to 2.5 V (with VDDQL = 2.5 V); the right port operates identically but independently using OPTR and VDDQR.
How does the BUSY flag function in Master vs. Slave configuration for the 70V659S12DRGI?
When M/S = VIH, the 70V659S12DRGI operates as Master and asserts BUSYL/BUSYR as outputs to signal contention to external logic. When M/S = VIL, it operates as Slave and expects BUSYL/BUSYR as inputs - deasserting its own write cycles until the BUSY input goes high, preventing data corruption during simultaneous access.
Can the 70V659S12DRGI be used in a 72-bit or wider memory system?
Yes, the 70V659S12DRGI supports 72-bit+ word systems via Master/Slave cascading. When multiple devices are connected, the M/S pin configures one as Master (BUSY output) and others as Slaves (BUSY input), enabling synchronized depth/width expansion without external arbitration logic or discrete gates.
What is the purpose of the semaphore functionality in the 70V659S12DRGI?
The semaphore functionality in the 70V659S12DRGI provides eight hardware-managed flags (addressed by A0–A2) accessible via SEML/SEMR. These enable atomic test-and-set operations between left and right ports, allowing lock-free synchronization in multi-processor systems - eliminating software polling and reducing inter-core latency to nanosecond scale.
70V659S12DRGI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 208-BFQFP
- Packaging:
- Tray
- Product Status:
- Active
- 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:
- 208-PQFP (28x28)
70V659S12DRGI FAQ
1.How can I place an order for 70V659S12DRGI through Aetrix?
Please submit a Request for Quotation (RFQ) for 70V659S12DRGI 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 70V659S12DRGI reliable?
The price and inventory of 70V659S12DRGI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V659S12DRGI is usually 5 days.
3.What payment methods are accepted for 70V659S12DRGI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V659S12DRGI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 70V659S12DRGI?
70V659S12DRGI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 70V659S12DRGI 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 70V659S12DRGI?
For technical support, including 70V659S12DRGI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V659S12DRGI requirements.
6.How does Aetrix verify that 70V659S12DRGI is sourced from the original manufacturer or authorized distributors?
All 70V659S12DRGI 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 70V659S12DRGI meets industry standards.
7.What is the process for return or replacement of 70V659S12DRGI?
All 70V659S12DRGI units undergo pre-shipment inspection (PSI). If there is an issue with 70V659S12DRGI, 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 70V659S12DRGI part is unused and in its original packaging.
Return procedure for 70V659S12DRGI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
70V659S12DRGI Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
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24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
STMicroelectronics
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AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
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24LC01BT-I/SN
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24AA02UIDT-I/OT
Microchip Technology
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AT24C08C-STUM-T
Microchip Technology
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