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Renesas 70V631S10BFG
- Part No.:
- 70V631S10BFG
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 208-LFBGA
- Datasheet:
-
70V631S10BFG.pdf
- Description:
- IC SRAM 4.5MBIT PAR 208CABGA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
70V631S10BFG from IDT (Integrated Device Technology) is a high-speed, asynchronous dual-port static RAM with 256K × 18-bit organization (4,608 Kbit), supporting simultaneous independent read/write access on left and right ports. It operates at 3.3V core supply with selectable 3.3V/2.5V I/O voltage per port via OPTL/OPTR pins, features on-chip semaphore and interrupt logic, and targets real-time inter-processor communication in telecom switching and industrial control systems.
For engineers reviewing the 70V631S10BFG datasheet, 70V631S10BFG pinout, 70V631S10BFG application, or 70V631S10BFG equivalent, this page delivers verified specifications, validated BGA-208 pin mapping, true dual-port arbitration behavior, industrial-grade timing (12 ns max access), and precise substitution guidance for memory expansion in deterministic embedded systems.
Technical Context
The 70V631S10BFG implements fully asynchronous dual-port architecture with independent address, data, and control buses per port - no clock required. Its on-chip arbitration logic resolves contention via BUSY flag assertion (MASTER mode) or BUSY input (SLAVE mode), with priority determined by tAPS (5 ns setup) and tBDD (10–15 ns disable-to-valid-data delay).
It supports JTAG IEEE 1149.1 boundary-scan only in BGA packages (not TQFP), and enables mixed-voltage operation: VDD = 3.3V ±150 mV for core logic, while VDDQL/VDDQR are independently set to 3.3V or 2.5V based on OPTL/OPTR levels - enabling seamless interfacing with 2.5V FPGAs and 3.3V microcontrollers in the same system.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 256K × 18-bit (4,608 Kbit); supports 36-bit+ word expansion via MASTER/SLAVE cascading |
| Access Time (tAA) | 10 ns (commercial grade); guarantees sub-10 ns valid data after address stable - critical for cycle-accurate DSP co-processing |
| Supply Voltages | VDD = 3.3V ±150 mV (core); VDDQL/VDDQR = 3.3V ±150 mV or 2.5V ±100 mV (I/O), selected per port via OPTL/OPTR |
| Operating Temperature | –40°C to +85°C (industrial grade); qualified for continuous operation in base station and motor drive environments |
| Package | 208-ball fine-pitch BGA (BFG208); 15 mm × 15 mm body, 0.8 mm ball pitch - compatible with standard SMT reflow profiles |
| Arbitration Logic | Hardware semaphore (8 flags, A0–A2 addressed), BUSY flag with tBAA ≤10 ns, and INTL/INTR interrupt signaling for event-driven synchronization |
| Power Consumption | ISB3 = 3–15 mA (full standby, CMOS inputs); IDD = 340–500 mA (dynamic, both ports active) - enables thermal-aware power budgeting |
Pinout & Package
70V631S10BFG is packaged in a 208-ball fine-pitch BGA (package code BFG208), with 15 mm × 15 mm footprint and 0.8 mm ball pitch. Pin functions are defined per port (Left/Right), with dedicated control, address, I/O, and arbitration signals. All VDD pins require 3.3V; VDDQL/VDDQR must match OPTL/OPTR voltage selection (3.3V or 2.5V).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A17L / A0R–A17R | Address Inputs (Left/Right) | 18-bit address bus per port; enables full 256K-word addressing without external decoding |
| I/O0L–I/O17L / I/O0R–I/O17R | Bidirectional Data Bus (Left/Right) | 18-bit parallel I/O per port; byte-selectable (UBL/LBL, UBR/LBR) for 9-bit granularity writes |
| CE0L/CE1L, CE0R/CE1R | Chip Enable Pairs | Dual CE per port allows depth expansion without glue logic; CE0X=VIL & CE1X=VIH enables port X |
| R/WL / R/WR | Read/Write Control | Active-low write enable per port; determines direction of data flow on I/O bus during access |
| OEL / OER | Output Enable | Tri-states I/O outputs when deasserted; used with CE to manage bus sharing in multi-device systems |
| SEML / SEMR | Semaphore Enable | Enables access to 8-bit semaphore register (A0–A2); required for inter-port coordination in shared-resource systems |
| BUSYL / BUSYR | Busy Flag (Master/Slave) | Output when M/S=VIH (Master); input when M/S=VIL (Slave); asserts during port contention to block conflicting writes |
| M/S | Master/Slave Select | Configures device role: VIH = Master (BUSY output), VIL = Slave (BUSY input); required for cascaded 36-bit+ configurations |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Simultaneous independent read/write to same memory location - eliminates software polling and enables lock-free IPC between CPUs |
| Per-Port I/O Voltage Selection | OPTL/OPTR pins configure VDDQL/VDDQR to 3.3V or 2.5V - enables direct interface with heterogeneous logic families without level shifters |
| Hardware Semaphore Support | 8 dedicated flags accessible via A0–A2; full on-chip logic handles atomic read-modify-write - removes need for external semaphores or software locks |
| Automatic Power-Down | CE0/CE1 control per-port standby; ISB3 as low as 3 mA (CMOS inputs) - reduces idle power in always-on telecom modules |
| Industrial Temperature Range | –40°C to +85°C operation with guaranteed 12 ns access time - suitable for under-hood automotive gateways and factory-floor PLCs |
| JTAG Boundary-Scan (IEEE 1149.1) | Supported in BGA packages (BFG208/BCG256); enables production test and debug without intrusive probes - improves board-level test coverage |
Applications
| Telecom Packet Switching | Industrial Motion Controller |
|---|---|
Use Scenario: Two ASICs exchange packet metadata and status flags in real time across a shared memory buffer. IC Role / Device Role / Timing Role: Dual-port SRAM acts as zero-latency inter-ASIC mailbox; BUSY arbitration prevents concurrent writes to same address. Use Value: Eliminates handshake overhead; 10 ns tAA ensures metadata updates complete within one 100 MHz ASIC clock cycle. |
Use Scenario: FPGA-based motion sequencer and ARM Cortex-M7 safety monitor share trajectory buffers and fault registers. IC Role / Device Role / Timing Role: Memory serves as deterministic, lock-free communication channel; semaphore flags coordinate axis enable/disable handshaking. Use Value: Hardware semaphore avoids race conditions; industrial temp rating ensures reliability in 70°C cabinet environments. |
| Avionics Display Processor | Medical Imaging Subsystem |
Use Scenario: GPU renders frames while safety-critical CPU validates pixel integrity using shared frame buffers. IC Role / Device Role / Timing Role: Dual-port RAM provides concurrent GPU write and CPU read access; INTL/INTR flags signal frame completion/validation events. Use Value: Interrupt-driven validation avoids polling; 12 ns tAA meets DO-254 deterministic timing budgets for Class C systems. |
Use Scenario: FPGA-accelerated image reconstruction engine and ARM application processor share DICOM header and raw pixel buffers. IC Role / Device Role / Timing Role: Memory enables pipelined processing: FPGA writes reconstructed slices while CPU reads headers for metadata tagging. Use Value: Asynchronous operation decouples processing clocks; 2.5V/3.3V I/O flexibility interfaces with both FPGA banks and SoC I/O rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C1362BV33-10BGXI | 128K × 32-bit, 10 ns access, 3.3V-only I/O, no per-port voltage select | Higher density but narrower bus; lacks OPT-controlled 2.5V I/O support | Choose when 32-bit word width suffices and mixed-voltage interface is unnecessary |
| AS7C331024B-12TIN | 1M × 18-bit, 12 ns access, single-port with burst interface, no BUSY/semaphore logic | Higher capacity but no true dual-port concurrency; requires external arbitration | Choose for cost-sensitive, non-real-time buffering where latency tolerance >12 ns |
Compared with CY7C1362BV33-10BGXI and AS7C331024B-12TIN, the 70V631S10BFG uniquely delivers per-port I/O voltage selection, hardware semaphore, and sub-10 ns access in an industrial-grade 208-BGA package - making it optimal for deterministic, mixed-voltage, multi-processor embedded systems.
Availability
70V631S10BFG is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, and avionics display systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for 70V631S10BFG 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
Integrated Device Technology (IDT), now part of Renesas Electronics, designs high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.
The 70V631S10BFG belongs to IDT's high-speed asynchronous dual-port SRAM product line, engineered specifically for deterministic inter-processor communication in real-time embedded systems demanding zero-software-overhead synchronization.
FAQ
What is the maximum operating temperature range supported by the 70V631S10BFG?
The 70V631S10BFG is rated for industrial temperature operation from –40°C to +85°C. This specification is guaranteed across all electrical parameters including 12 ns maximum access time (tAA), BUSY arbitration timing, and standby current (ISB3 ≤15 mA), making it suitable for deployment in harsh environments such as factory automation controllers and outdoor telecom cabinets.
Does the 70V631S10BFG support JTAG boundary-scan testing?
Yes, the 70V631S10BFG supports IEEE 1149.1 JTAG boundary-scan in its BGA packages (BFG208 and BCG256), with dedicated TDI, TDO, TCK, TMS, and TRST pins. JTAG is explicitly not supported in the 128-pin TQFP variant due to pin count limitations - confirmed in the datasheet note on page 1.
How does the M/S pin affect BUSY signal behavior in the 70V631S10BFG?
When M/S = VIH, the 70V631S10BFG operates as a Master: BUSYL and BUSYR are active outputs that assert during port contention to block conflicting writes. When M/S = VIL, it operates as a Slave: BUSYL and BUSYR become inputs, allowing external arbitration - essential for cascaded MASTER/SLAVE configurations expanding data width beyond 18 bits.
Can the left and right ports of the 70V631S10BFG operate at different I/O voltages simultaneously?
Yes. The 70V631S10BFG supports independent I/O voltage selection per port: OPTL sets VDDQL to 3.3V (VIH) or 2.5V (VIL), and OPTR sets VDDQR accordingly. This allows the left port to interface with a 2.5V FPGA bank while the right port connects to a 3.3V microcontroller - eliminating external level shifters and reducing BOM cost.
What is the purpose of the semaphore feature in the 70V631S10BFG, and how is it accessed?
The 70V631S10BFG includes eight hardware semaphore flags used for atomic resource locking between ports. They are accessed by setting SEM = VIL and CE = VIH, then addressing A0–A2 (0–7). Writing to I/O0 stores the flag value; reading any I/O pin returns the full 8-bit semaphore state - enabling lock-free coordination without software intervention or external logic.
70V631S10BFG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 208-LFBGA
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Asynchronous
- Memory Size:
- 4.5Mbit
- Memory Organization:
- 256K x 18
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 10ns
- Access Time:
- 10 ns
- Voltage - Supply:
- 3.15V ~ 3.45V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 208-CABGA (15x15)
70V631S10BFG FAQ
1.How can I place an order for 70V631S10BFG through Aetrix?
Please submit a Request for Quotation (RFQ) for 70V631S10BFG 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 70V631S10BFG reliable?
The price and inventory of 70V631S10BFG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V631S10BFG is usually 5 days.
3.What payment methods are accepted for 70V631S10BFG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V631S10BFG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 70V631S10BFG?
70V631S10BFG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 70V631S10BFG 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 70V631S10BFG?
For technical support, including 70V631S10BFG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V631S10BFG requirements.
6.How does Aetrix verify that 70V631S10BFG is sourced from the original manufacturer or authorized distributors?
All 70V631S10BFG 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 70V631S10BFG meets industry standards.
7.What is the process for return or replacement of 70V631S10BFG?
All 70V631S10BFG units undergo pre-shipment inspection (PSI). If there is an issue with 70V631S10BFG, 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 70V631S10BFG part is unused and in its original packaging.
Return procedure for 70V631S10BFG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
70V631S10BFG Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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AT24C02C-SSHM-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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24AA02UIDT-I/OT
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AT24C08C-STUM-T
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