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Renesas 70V657S10BCG
- Part No.:
- 70V657S10BCG
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 256-LBGA
- Datasheet:
-
70V657S10BCG.pdf
- Description:
- IC SRAM 1.125MBIT PAR 256CABGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,338
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Product details
Overview
70V657S10BCG from IDT is a high-speed 32K × 36 asynchronous dual-port static RAM with fully independent left/right ports, 10 ns max read/write cycle time (commercial grade), LVTTL-compatible I/Os, and on-chip semaphore arbitration logic-designed for real-time inter-processor communication in telecom line cards and industrial PLC backplanes.
For engineers reviewing the 70V657S10BCG datasheet, 70V657S10BCG pinout, 70V657S10BCG application, or 70V657S10BCG equivalent, this device supports simultaneous access to shared memory locations, master/slave cascading for 72-bit+ bus expansion, and JTAG IEEE 1149.1 compliance for boundary-scan testability in high-reliability embedded systems.
Technical Context
The 70V657S10BCG implements true dual-port SRAM cells enabling concurrent read/write operations from either port without external arbitration logic. Its port arbitration engine handles semaphore flag exchange, BUSY/INT signaling, and automatic contention resolution between left and right ports.
Each port features independent CE0/CE1 enables, R/W control, byte-enable (BE0–BE3) for 9-bit granularity, and selectable 3.3 V or 2.5 V I/O voltage via OPTL/OPTR pins-while core VDD remains fixed at 3.3 V ±150 mV. Address lines A0–A14 are functional; A15L/A15R and A16L/A16R are no-connects per datasheet Note 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 32K × 36 bits = 1.152 Mbit total; supports standalone 36-bit or cascaded 72-bit+ word systems via MASTER/SLAVE mode |
| Access Time | 10 ns (max) read/write cycle time; enables synchronization with 100 MHz bus interfaces without wait states |
| Supply Voltages | VDD = 3.3 V ±150 mV (core); VDDQL/VDDQR = 3.3 V ±150 mV or 2.5 V ±100 mV (I/Os), selected independently per port via OPT pins |
| Operating Temperature | Commercial grade: 0°C to +70°C; qualified for stable operation in telecom and industrial control enclosures |
| Package | 208-ball fine-pitch BGA (BCG256 package code); 15 mm × 15 mm body, 0.8 mm ball pitch, RoHS-compliant green variant available |
| JTAG Support | Fully compliant with IEEE 1149.1; includes TDI, TDO, TCK, TMS, TRST pins for production test and debug integration |
| Power Consumption | Dynamic current ≤500 mA (both ports active); full standby current ≤15 mA (CMOS-level inputs, f = 0) |
Pinout & Package
70V657S10BCG is housed in a 208-ball fine-pitch BGA (package code BCG256), with 15 mm × 15 mm footprint, 0.8 mm ball pitch, and standard JEDEC MO-245 mechanical outline. Ball assignments follow the top-view layout defined in IDT document 4869 drw 02b.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A14L A0R–A14R |
Address Inputs (Left/Right) | 15-bit address bus per port; A15/A16 are NC per datasheet Note 2-no routing required |
| I/O0L–I/O35L I/O0R–I/O35R |
Bidirectional Data I/O (36-bit per port) | Independent 36-bit data paths; BE0–BE3 enable 9-bit byte writes without bus turnaround overhead |
| CE0L/CE1L, CE0R/CE1R | Chip Enable Inputs | Dual CE per port allows depth expansion without external logic; CE0=VIL & CE1=VIH enables memory access |
| R/WL/R/WR | Read/Write Control | Active-low write enable; high = read, low = write; supports R/W-controlled or CE-controlled write timing modes |
| OEL/OER | Output Enable | Controls output drivers per port; when high, all I/Os enter high-impedance state regardless of R/W state |
| BE0L–BE3L, BE0R–BE3R | Byte Enable Inputs | Four independent 9-bit byte enables per port; enables partial-word writes (e.g., update only lower 18 bits) |
| SEML/SEMR | Semaphore Enable | Activates on-chip semaphore register (8 flags addressed by A0–A2); used for inter-port synchronization |
| BUSYL/BUSYR, INTL/INTR | Arbitration Flags | BUSY is totem-pole output (Master) or input (Slave); INT is non-tri-state interrupt flag for event notification |
| M/S | Master/Slave Select | M/S = VIH configures port as Master (BUSY output); M/S = VIL configures as Slave (BUSY input) |
| OPTL/OPTR | I/O Voltage Select | OPT = VDD → 3.3 V I/O levels; OPT = VSS → 2.5 V I/O levels; sets VDDQX supply requirement accordingly |
| VDD, VDDQL, VDDQR, VSS | Power/Ground | VDD = 3.3 V core supply (all VDD pins tied); VDDQX must match OPT setting; all VSS pins connected to ground plane |
| TDI, TDO, TCK, TMS, TRST | JTAG Test Interface | IEEE 1149.1 boundary-scan support; enables automated PCB test and in-system programming verification |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Simultaneous independent read/write access to same memory location from left and right ports-eliminates software arbitration overhead |
| On-Chip Semaphore Logic | Hardware-managed 8-flag semaphore register (A0–A2 addressable) with atomic read/write-enables deterministic inter-processor coordination |
| Configurable I/O Voltage | Per-port 3.3 V / 2.5 V I/O selection via OPT pins-supports mixed-voltage system interfacing without level shifters |
| Master/Slave Cascading | Supports >72-bit word widths using multiple devices; M/S pin configures BUSY direction-no external glue logic needed |
| Low-Power Standby Modes | Full standby current ≤15 mA (CMOS inputs); dynamic current scales with activity-optimized for burst-mode telecom processing |
| JTAG IEEE 1149.1 Compliance | Production-testable boundary-scan chain with dedicated TAP controller-reduces test development time and improves yield analysis |
Applications
| Telecom Line Card Buffering | Industrial PLC Backplane Memory |
|---|---|
|
Use Scenario: High-throughput packet buffering between DSP and FPGA on a 10Gbps line card, requiring zero-latency inter-processor data exchange. IC Role / Device Role / Timing Role: Dual-port SRAM acts as shared FIFO buffer; left port connects to DSP (3.3 V I/O), right port to FPGA (2.5 V I/O) with independent OPT configuration. Use Value: 10 ns access time eliminates pipeline stalls; hardware semaphore ensures deterministic ownership handoff during burst transfers. |
Use Scenario: Real-time motion control in modular PLC chassis where CPU and I/O modules share status and command data across backplane. IC Role / Device Role / Timing Role: Acts as synchronized shared memory between CPU and distributed I/O processors; BUSY/INT signals coordinate write contention. Use Value: On-chip arbitration prevents data corruption during simultaneous updates; industrial temp range (–40°C to +85°C) ensures field reliability. |
| Avionics Data Concentrator | Medical Imaging Frame Store |
|
Use Scenario: ARINC 664 (AFDX) end-system aggregating sensor data from multiple LRUs into unified health monitoring packets. IC Role / Device Role / Timing Role: Dual-port RAM buffers incoming sensor frames (left port) while CPU reads and packages them (right port) with timestamp alignment. Use Value: JTAG testability meets DO-254 tool qualification requirements; green RoHS packaging satisfies aerospace material compliance. |
Use Scenario: Ultrasound or MRI subsystem storing raw pixel data from ADC array before GPU-based reconstruction. IC Role / Device Role / Timing Role: Provides low-latency, deterministic frame storage with parallel acquisition (left port) and processing (right port) paths. Use Value: 36-bit width matches native ADC output; 10 ns access enables real-time streaming at >100 MB/s sustained bandwidth. |
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 | 32K × 36, 10 ns, 3.3 V core/I/O; no JTAG; no per-port I/O voltage select; 256-ball BGA (17 mm × 17 mm) | Lacks OPT-driven 2.5 V I/O support and IEEE 1149.1 test interface-requires external level shifters in mixed-voltage designs | Select when JTAG and flexible I/O voltage are not required; verify PCB keepout for larger package footprint |
| AS7C33256P-10BIN | 32K × 36, 10 ns, 3.3 V only; no semaphore logic; no BUSY/INT flags; 208-pin PQFP package | Relies on external arbitration logic; lacks hardware semaphore and port-to-port signaling-increases BOM count and firmware complexity | Choose for cost-sensitive, space-tolerant designs where external arbitration is acceptable and JTAG is unnecessary |
Compared with CY7C1362BV33-10BGXI and AS7C33256P-10BIN, the 70V657S10BCG delivers unique value through integrated JTAG testability, per-port I/O voltage configurability, and hardware semaphore-reducing system-level design risk and validation effort in safety-critical applications.
Availability
70V657S10BCG is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, avionics data concentrators, and medical imaging systems requiring stable component supply across extended product lifecycles.
Supply support for 70V657S10BCG 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 power management ICs for communications, computing, and industrial markets.
The 70V657S10BCG belongs to IDT's high-speed asynchronous dual-port SRAM product line, engineered for deterministic inter-processor communication in real-time embedded systems demanding sub-10 ns latency and hardware arbitration.
FAQ
What is the maximum operating frequency supported by the 70V657S10BCG?
The 70V657S10BCG does not operate at a clock frequency-it is an asynchronous SRAM. Its performance is specified by access times: 10 ns maximum read/write cycle time (tRC), enabling reliable interface with 100 MHz bus systems without wait states. Timing is controlled by CE, R/W, OE, and BE signal transitions-not a system clock.
Does the 70V657S10BCG support 2.5 V I/O operation on both ports simultaneously?
Yes. The 70V657S10BCG supports independent I/O voltage selection per port via OPTL and OPTR pins. Setting both OPTL and OPTR to VSS configures both ports for 2.5 V ±100 mV I/O operation, with corresponding VDDQL and VDDQR supplies set to 2.5 V. This enables seamless integration into mixed-voltage SoC interfaces.
How are A15 and A16 handled in the 70V657S10BCG?
Per IDT datasheet Note 2, A15L, A15R, A16L, and A16R are no-connect (NC) pins on the 70V657S10BCG. Only A0–A14 are functional address inputs on each port. These NC pins must remain unconnected-no pull-up, pull-down, or routing is required, simplifying PCB layout.
Can the 70V657S10BCG be used in industrial temperature applications?
No-the 70V657S10BCG is rated for commercial temperature range only (0°C to +70°C). For industrial applications (–40°C to +85°C), IDT specifies the 70V657S12BCG or 70V657S15BCG variants. Using the 70V657S10BCG outside its rated range may result in timing violations or data retention failure.
What is the function of the M/S pin on the 70V657S10BCG?
The M/S (Master/Slave) pin configures BUSY signal behavior: when M/S = VIH, the device operates as Master and asserts BUSY as an output to block the opposing port during contention; when M/S = VIL, it operates as Slave and accepts BUSY as an input. This enables hierarchical arbitration in multi-device cascades without external logic.
70V657S10BCG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 256-LBGA
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Asynchronous
- Memory Size:
- 1.125Mbit
- Memory Organization:
- 32K x 36
- 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:
- 256-CABGA (17x17)
70V657S10BCG FAQ
1.How can I place an order for 70V657S10BCG through Aetrix?
Please submit a Request for Quotation (RFQ) for 70V657S10BCG 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 70V657S10BCG reliable?
The price and inventory of 70V657S10BCG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V657S10BCG is usually 5 days.
3.What payment methods are accepted for 70V657S10BCG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V657S10BCG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 70V657S10BCG?
70V657S10BCG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 70V657S10BCG 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 70V657S10BCG?
For technical support, including 70V657S10BCG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V657S10BCG requirements.
6.How does Aetrix verify that 70V657S10BCG is sourced from the original manufacturer or authorized distributors?
All 70V657S10BCG 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 70V657S10BCG meets industry standards.
7.What is the process for return or replacement of 70V657S10BCG?
All 70V657S10BCG units undergo pre-shipment inspection (PSI). If there is an issue with 70V657S10BCG, 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 70V657S10BCG part is unused and in its original packaging.
Return procedure for 70V657S10BCG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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