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Renesas 70T651S10BFGI8
- Part No.:
- 70T651S10BFGI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 208-LFBGA
- Datasheet:
-
70T651S10BFGI8.pdf
- Description:
- IC SRAM 9MBIT PARALLEL 208CABGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,413
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Product details
Overview
70T651S10BFGI8 from Integrated Device Technology is a high-speed 256K × 36-bit asynchronous dual-port static RAM with independent left/right ports, 10 ns read cycle time, 2.5 V core supply, and selectable 2.5 V/3.3 V I/O interface per port - used in real-time inter-processor communication, FPGA co-processing buffers, and telecom line-card memory arbitration.
For engineers reviewing the 70T651S10BFGI8 datasheet, 70T651S10BFGI8 pinout, 70T651S10BFGI8 application, or 70T651S10BFGI8 equivalent, this page delivers verified package mapping (BF-208 fpBGA), true dual-port timing behavior, RapidWrite mode operation, industrial temperature support (–40°C to +85°C), and JTAG-compliant IEEE 1149.1 test access.
Technical Context
The 70T651S10BFGI8 implements fully asynchronous dual-port architecture with on-chip arbitration logic and hardware semaphore signaling across both ports. It supports simultaneous read/write to the same memory location without external logic.
Each port features independent CE0/CE1 enables, R/W control, byte enables (BE0–BE3), output enable (OE), and dedicated OPT pins for per-port I/O voltage selection (2.5 V or 3.3 V). The device includes sleep mode (ZZL/ZZR), BUSY/INT flags, and Master/Slave cascading capability via M/S pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 256K × 36 bits (9,216 Kbit total); supports 72-bit+ expansion via Master/Slave cascading |
| Access Time (tAA) | 10 ns max (commercial grade); enables full-speed CPU/FPGA interface at ≤100 MHz effective throughput |
| Core Supply Voltage | 2.5 V ±100 mV; fixed VDD requirement - decoupling critical for noise-sensitive dual-port operation |
| I/O Interface Voltage | Selectable per port: 2.5 V or 3.3 V via OPTL/OPTR; requires matching VDDQL/VDDQR supply |
| Operating Temperature | –40°C to +85°C (industrial grade); validated for telecom and industrial control environments |
| Package | 208-ball fine-pitch BGA (BF-208); 15 mm × 15 mm body, 0.8 mm ball pitch, RoHS-compliant |
| JTAG Support | IEEE 1149.1 compliant (TCK, TMS, TDI, TDO, TRST); functional during sleep mode exclusion |
Pinout & Package
70T651S10BFGI8 is packaged in a 208-ball fpBGA (BF-208) with 0.8 mm pitch, 15 mm × 15 mm footprint, and 1.4 mm height. Ball assignments follow JEDEC MO-255 standard with dedicated power/ground arrays and symmetric I/O banks for left/right ports.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A17L, A0R–A17R | Address Inputs (Left/Right) | 18-bit address per port; A17L/A17R are NC for 128K variants but functional for 256K configuration |
| I/O0L–I/O35L, I/O0R–I/O35R | Bidirectional Data (36-bit wide) | True dual-port data paths; each port independently drives or latches 36-bit words |
| CE0L/CE1L, CE0R/CE1R | Chip Enable Pairs | Two enables per port - CE0L=VIH & CE1L=VIL disables left port; enables allow depth expansion without glue logic |
| R/WL/R/WR, OEL/OER | Control Inputs | Asynchronous read/write control; OE asserts outputs only when CE active and R/W = HIGH |
| BE0L–BE3L, BE0R–BE3R | Byte Enables (9-bit) | Four independent 9-bit byte masks per port - enables partial writes without read-modify-write overhead |
| OPTL/OPTR, VDDQL/VDDQR | I/O Voltage Select | OPT = VSS → 2.5 V I/O; OPT = VDD → 3.3 V I/O; VDDQ must match selected level |
| ZZL/ZZR, BUSYL/BUSYR | Sleep & Busy Flags | ZZ = VIH forces low-power sleep (IZZ ≤ 10 µA); BUSY is output (Master) or input (Slave) for port arbitration |
| SEML/SEMR, INTL/INTR | Semaphore & Interrupt | Hardware semaphore flags (8 shared registers) and interrupt assertion for inter-port event signaling |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Simultaneous independent access to same memory location by left/right ports - eliminates arbitration wait states in real-time systems |
| RapidWrite Mode | Back-to-back writes without pulsing R/W or CE; address transition defines write end - simplifies high-speed burst controller design |
| Per-Port I/O Voltage Flexibility | Independent 2.5 V/3.3 V interface on each port - enables mixed-voltage system integration (e.g., 2.5 V FPGA + 3.3 V microcontroller) |
| Hardware Semaphore Logic | On-chip 8-flag semaphore register accessible via A0–A2; eliminates external lock management logic and reduces latency |
| IEEE 1149.1 JTAG Test Access | Full boundary-scan support with TCK/TMS/TDI/TDO/TRST - enables in-system test and debug without halting operation |
| Industrial Temperature Range | –40°C to +85°C operation with validated DC/AC specs - suitable for base station, motor drive, and railway control applications |
Applications
| Telecom Line Card Buffer | FPGA-CPU Co-Processing Memory |
|---|---|
|
Use Scenario: High-throughput packet buffering between line interface ASIC and traffic manager ASIC in 10G/40G optical transport equipment. IC Role / Device Role / Timing Role: Dual-port SRAM acts as zero-latency FIFO between asymmetric data paths - left port accepts framed payload, right port feeds scheduler engine. Use Value: 10 ns tAA and simultaneous read/write eliminate pipeline stalls; BUSY flag prevents contention during shared-address updates. |
Use Scenario: Real-time data exchange between Xilinx Zynq SoC (ARM + PL) and external DSP in radar signal processing subsystem. IC Role / Device Role / Timing Role: Shared memory buffer enabling deterministic PL-to-ARM DMA transfers without software locks or cache coherency overhead. Use Value: Hardware semaphore (SEML/SEMR) synchronizes frame ownership; RapidWrite mode accelerates coefficient table updates at 100+ MB/s. |
| Industrial PLC Dual-Core Communication | Avionics Data Concentrator |
|
Use Scenario: Inter-core messaging between safety-critical ARM Cortex-R5 lockstep cores and application Cortex-A53 in modular PLC backplane. IC Role / Device Role / Timing Role: Memory-mapped mailbox with atomic flag access - left port serves R5 firmware, right port serves A53 Linux RTOS. Use Value: Industrial temp rating ensures reliability in cabinet environments; M/S pin enables master/slave failover without layout change. |
Use Scenario: Time-triggered data aggregation from ARINC 429 receivers and discrete sensor inputs in flight control computer. IC Role / Device Role / Timing Role: Deterministic dual-port buffer synchronizing asynchronous sensor reads with periodic ARINC transmit cycles. Use Value: JTAG test access supports DO-254 compliance; ZZL/ZZR sleep mode reduces idle power in battery-backed 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 |
|---|---|---|---|
| Cypress CY7C1362BV33 | 256K × 18-bit (half data width); 12 ns access; 3.3 V core/I/O; no per-port voltage select | Limited to 18-bit bus widths; requires two devices for 36-bit interface; lacks RapidWrite mode | Choose when 3.3 V-only system and lower density suffice; avoid if 2.5 V core or 36-bit native width required |
| Microchip 21CS02-25 | 128K × 36-bit; 25 ns access; 3.3 V core/I/O; no JTAG; no semaphore logic | Slower timing limits use in >40 MHz systems; no hardware arbitration - requires external logic for multi-master sync | Acceptable for cost-sensitive industrial controllers where latency <25 ns is acceptable and software semaphore is viable |
Compared with CY7C1362BV33 and 21CS02-25, the 70T651S10BFGI8 uniquely delivers 10 ns 36-bit dual-port performance with per-port I/O flexibility, integrated semaphores, and RapidWrite - making it irreplaceable in high-determinism, mixed-voltage, or space-constrained designs.
Availability
70T651S10BFGI8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and avionics data concentrators requiring stable component supply, long-life availability, and traceable sourcing.
Supply support for 70T651S10BFGI8 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, specializes in high-performance timing, memory interface, and RF power solutions for communications and computing markets.
The 70T651S10BFGI8 belongs to IDT's high-speed dual-port SRAM product line, engineered for deterministic inter-processor communication in real-time embedded systems where latency, reliability, and voltage flexibility are critical.
FAQ
What is the maximum operating frequency supported by the 70T651S10BFGI8?
The 70T651S10BFGI8 does not operate on a clock signal - it is an asynchronous dual-port SRAM. Its performance is defined by access times: 10 ns read cycle time (tRC), 10 ns address access (tAA), and 10 ns write cycle (tWC). These specifications enable reliable operation in systems with effective data rates up to 100 MHz when interfaced with appropriate controllers.
Does the 70T651S10BFGI8 support true simultaneous read/write to the same memory address?
Yes, the 70T651S10BFGI8 uses true dual-port memory cells that allow concurrent read and write operations to the identical address location - one port reading while the other writes. This eliminates arbitration delays and is essential for real-time inter-processor handshaking in applications like telecom line cards and radar processors.
How does the RapidWrite mode function in the 70T651S10BFGI8?
RapidWrite mode in the 70T651S10BFGI8 allows consecutive write operations without toggling R/W, CE, or BE signals between cycles. The write end is determined by the next address transition, not control signal deassertion. This reduces controller complexity and enables sustained write bandwidth exceeding 80 MB/s in optimized systems using the 70T651S10BFGI8.
Can the left and right ports of the 70T651S10BFGI8 operate at different I/O voltages?
Yes - the 70T651S10BFGI8 supports independent I/O voltage selection per port via OPTL and OPTR pins. Setting OPTL = VSS configures the left port for 2.5 V I/O (with VDDQL = 2.5 V), while OPTR = VDD configures the right port for 3.3 V I/O (with VDDQR = 3.3 V). This enables seamless interfacing between mixed-voltage subsystems without level shifters.
Is JTAG boundary-scan available during sleep mode on the 70T651S10BFGI8?
No - JTAG operation is disabled during sleep mode (when ZZL or ZZR = VIH). The 70T651S10BFGI8 specification explicitly states that boundary scan should not be operated during sleep mode, as dynamic inputs (including TCK/TMS) are shut off. To perform JTAG testing, ensure both ZZL and ZZR are held at VIL before initiating scan operations on the 70T651S10BFGI8.
70T651S10BFGI8 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:
- 9Mbit
- Memory Organization:
- 256K x 36
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 10ns
- Access Time:
- 10 ns
- Voltage - Supply:
- 2.4V ~ 2.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 208-CABGA (15x15)
70T651S10BFGI8 FAQ
1.How can I place an order for 70T651S10BFGI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 70T651S10BFGI8 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 70T651S10BFGI8 reliable?
The price and inventory of 70T651S10BFGI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70T651S10BFGI8 is usually 5 days.
3.What payment methods are accepted for 70T651S10BFGI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70T651S10BFGI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 70T651S10BFGI8?
70T651S10BFGI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 70T651S10BFGI8 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 70T651S10BFGI8?
For technical support, including 70T651S10BFGI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70T651S10BFGI8 requirements.
6.How does Aetrix verify that 70T651S10BFGI8 is sourced from the original manufacturer or authorized distributors?
All 70T651S10BFGI8 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 70T651S10BFGI8 meets industry standards.
7.What is the process for return or replacement of 70T651S10BFGI8?
All 70T651S10BFGI8 units undergo pre-shipment inspection (PSI). If there is an issue with 70T651S10BFGI8, 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 70T651S10BFGI8 part is unused and in its original packaging.
Return procedure for 70T651S10BFGI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
70T651S10BFGI8 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
Microchip Technology
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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
Microchip Technology
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24AA02UIDT-I/OT
Microchip Technology
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AT24C08C-STUM-T
Microchip Technology
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