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Renesas 70T633S15BC8
- Part No.:
- 70T633S15BC8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 256-LBGA
- Datasheet:
-
70T633S15BC8.pdf
- Description:
- IC SRAM 9MBIT PARALLEL 256CABGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,858
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Product details
Overview
70T633S15BC8 from Integrated Device Technology is a high-speed 512K × 18-bit asynchronous dual-port static RAM with true simultaneous access, 15 ns max read/write cycle time, 2.5 V core supply, and selectable 2.5 V/3.3 V I/O interface per port. It supports RapidWrite Mode for back-to-back writes and on-chip semaphore arbitration-used in real-time embedded systems requiring deterministic inter-processor communication.
For engineers reviewing the 70T633S15BC8 datasheet, 70T633S15BC8 pinout, 70T633S15BC8 application, or 70T633S15BC8 equivalent, this device delivers deterministic dual-port memory access with hardware semaphore signaling, JTAG-compliant boundary scan (BGA-256), and industrial-grade temperature support up to +85°C-critical for telecom line cards, avionics data buffers, and multi-CPU industrial controllers.
Technical Context
The 70T633S15BC8 implements fully asynchronous dual-port architecture with independent address, control, and data buses per port, enabling concurrent read/write operations to the same memory location without external arbitration logic. Its on-chip port arbitration resolves contention via BUSY flag and M/S master/slave configuration.
RapidWrite Mode eliminates R/W pulse requirements between consecutive writes by defining write end via address transition, reducing timing overhead at 15 ns cycle times. The device supports JTAG IEEE 1149.1 test access in BGA-256 packages and features separate byte enables (UBL/LBL, UBR/LBR) for 9-bit granularity access.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 512K × 18 bits (9,216 Kbit total); supports depth expansion to 36+ bits via Master/Slave cascading |
| Access Time (max) | 15 ns - guarantees worst-case read latency for commercial-grade timing-critical systems |
| Core Supply Voltage | 2.5 V ±100 mV - fixed low-voltage core enabling power-efficient operation without voltage translation |
| I/O Interface Voltage | Selectable 2.5 V or 3.3 V per port via OPTL/OPTR pins - allows mixed-voltage system integration |
| Operating Temperature | 0°C to +70°C (Commercial grade) - validated for stable operation in office and lab environments |
| Package | 256-ball BGA (17 mm × 17 mm, 1.0 mm pitch) - high-density footprint compatible with automated SMT assembly |
| Standby Current (ISB3) | 2–10 mA - ultra-low full-standby power when both ports are deselected with CMOS-level inputs |
Pinout & Package
256-ball Ball Grid Array (BGA) package with 17 mm × 17 mm body, 1.0 mm ball pitch, and standard JEDEC MO-275AC mechanical outline. All VDD pins require 2.5 V; VDDQ pins must match OPT pin selection (2.5 V if OPT = VSS, 3.3 V if OPT = VDD).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A18L / A0R–A18R | Address Inputs (Left/Right) | 19-bit address bus per port; A18 is NC for IDT70T631 variants only |
| I/O0L–I/O17L / I/O0R–I/O17R | Bidirectional Data I/O (18-bit) | True dual-port data path; supports simultaneous read/write to same location |
| CE0L/CE1L, CE0R/CE1R | Chip Enable Pairs | Dual-enable logic per port: CE0=VIL & CE1=VIH enables memory access |
| R/WL / R/WR | Read/Write Control | Active-low write enable; controls direction of data flow on respective port |
| OEL / OER | Output Enable | Tri-states outputs independently per port; required for bus sharing |
| UBL/LBL, UBR/LBR | Byte Select Controls | Enables upper (I/O9–I/O17) or lower (I/O0–I/O8) 9-bit byte independently |
| BUSYL / BUSYR | Busy Flag (I/O) | Output when M/S=VIH (Master); input when M/S=VIL (Slave) - enables hardware arbitration |
| SEML / SEMR | Semaphore Enable | Activates 8-bit semaphore register accessed via A0–A2; used for inter-port synchronization |
| INTL / INTR | Interrupt Flag | Push-pull output asserting on semaphore event or write completion - no external pull-up needed |
| M/S | Master/Slave Select | Configures BUSY as output (Master) or input (Slave); enables cascaded 36-bit+ memory systems |
| ZZL / ZZR | Sleep Mode Input | Asserting VIH disables dynamic inputs (except JTAG), reducing current to ≤10 mA |
| OPTL / OPTR | I/O Voltage Select | Set to VSS for 2.5 V I/O operation; set to VDD for 3.3 V I/O operation - independent per port |
| TCK/TMS/TDI/TDO/TRST | JTAG Boundary Scan | Fully compliant with IEEE 1149.1; supports in-system test and debug in BGA-256 package |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Memory Cells | Enables simultaneous, conflict-free access to identical memory locations from two independent buses - eliminates software arbitration overhead |
| RapidWrite Mode | Allows consecutive write cycles without toggling R/W, CE, or byte enables - simplifies timing-critical controller design at 15 ns cycle rates |
| On-Chip Port Arbitration Logic | Hardware-resolved BUSY flag and semaphore registers prevent race conditions during inter-processor data exchange |
| Independent I/O Voltage Selection | OPTL/OPTR pins configure each port for 2.5 V or 3.3 V signaling - enables seamless integration into mixed-voltage SoC subsystems |
| JTAG IEEE 1149.1 Support | Full boundary-scan capability in BGA-256 package - enables production testability and debug without physical probe access |
Applications
| Telecom Line Card Buffering | Avionics Flight Data Recorder |
|---|---|
Use Scenario: Dual-processor architecture where DSP handles signal processing while ARM manages protocol stack and storage. IC Role / Device Role / Timing Role: Shared memory buffer with hardware semaphore coordination between processors accessing flight telemetry streams. Use Value: Eliminates software mutex delays; 15 ns access ensures real-time response to sensor interrupts without jitter. |
Use Scenario: High-integrity recording of aircraft sensor data across redundant flight control computers. IC Role / Device Role / Timing Role: Asynchronous dual-port SRAM acting as synchronized write buffer between primary and backup controllers. Use Value: BUSY flag prevents overwrites during simultaneous writes; RapidWrite mode sustains 66.7 MHz sustained write throughput. |
| Industrial PLC Multi-Core I/O Hub | Medical Imaging Real-Time Frame Buffer |
Use Scenario: Programmable logic controller with separate motion control and HMI cores sharing I/O status tables. IC Role / Device Role / Timing Role: Deterministic memory resource enabling lock-free updates of digital I/O state maps between cores. Use Value: On-chip semaphore flags coordinate access to shared safety-critical I/O registers without CPU intervention. |
Use Scenario: MRI or CT scanner front-end where FPGA acquires raw image frames and DSP performs reconstruction. IC Role / Device Role / Timing Role: High-bandwidth frame buffer allowing FPGA to write while DSP reads prior frame without pipeline stalls. Use Value: 512K × 18 organization provides 1.8 MB capacity; 15 ns access enables >66 MB/s sustained bandwidth per port. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C1371BV33-15BGXI | 3.3 V core; no selectable I/O voltage; 15 ns access but only 256K × 18 density | Lacks RapidWrite Mode and hardware semaphore; requires external arbitration logic for multi-core sync | Choose when system uses only 3.3 V rails and does not require inter-processor signaling primitives |
| AS7C331024B-15JIN | Single-port architecture; 15 ns access; 1M × 18 organization; 2.5 V core with 3.3 V tolerant I/O | No dual-port capability; cannot support simultaneous read/write or hardware arbitration | Use only when memory access is strictly sequential and no inter-processor coordination is needed |
Compared with CY7C1371BV33-15BGXI and AS7C331024B-15JIN, the 70T633S15BC8 uniquely delivers true dual-port operation with integrated semaphore and RapidWrite Mode-enabling deterministic, low-latency inter-core communication without external logic or firmware overhead.
Availability
70T633S15BC8 is available at Aetrix Electronics and suitable for telecom infrastructure, avionics data buffering, and industrial PLC I/O hub applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for 70T633S15BC8 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 RF solutions for communications, computing, and industrial markets.
The 70T633S15BC8 belongs to IDT's high-speed asynchronous dual-port SRAM product line, engineered specifically for deterministic inter-processor communication in real-time embedded systems with strict timing and reliability requirements.
FAQ
What is the maximum operating temperature range for the 70T633S15BC8?
The 70T633S15BC8 is rated for commercial temperature operation from 0°C to +70°C. While the broader 70T633/1 family includes industrial-grade variants (–40°C to +85°C), the specific 70T633S15BC8 speed grade and package configuration are qualified only for commercial temperature use per IDT documentation.
Does the 70T633S15BC8 support JTAG boundary scan?
Yes, the 70T633S15BC8 supports IEEE 1149.1 JTAG boundary scan in its BGA-256 package. Pins TCK, TMS, TDI, TDO, and TRST are dedicated for test access, enabling in-system verification and debug without physical probe contact.
How does RapidWrite Mode function in the 70T633S15BC8?
RapidWrite Mode in the 70T633S15BC8 allows consecutive write operations without pulsing R/W, CE, or byte enables between cycles. The write end is defined by the address transition, reducing controller timing complexity and enabling reliable 15 ns back-to-back writes.
Can the left and right ports of the 70T633S15BC8 operate at different I/O voltages?
Yes. The 70T633S15BC8 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, while OPTR = VDD configures the right port for 3.3 V I/O - enabling mixed-voltage system integration.
What is the role of the BUSY pin in master/slave configurations of the 70T633S15BC8?
In the 70T633S15BC8, BUSY is an output when M/S = VIH (Master) and an input when M/S = VIL (Slave). This enables hardware-based port arbitration: the Master asserts BUSY to block Slave writes during critical memory access, preventing data corruption.
70T633S15BC8 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:
- 9Mbit
- Memory Organization:
- 512K x 18
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 15ns
- Access Time:
- 15 ns
- Voltage - Supply:
- 2.4V ~ 2.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 256-CABGA (17x17)
70T633S15BC8 FAQ
1.How can I place an order for 70T633S15BC8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 70T633S15BC8 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 70T633S15BC8 reliable?
The price and inventory of 70T633S15BC8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70T633S15BC8 is usually 5 days.
3.What payment methods are accepted for 70T633S15BC8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70T633S15BC8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 70T633S15BC8?
70T633S15BC8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 70T633S15BC8 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 70T633S15BC8?
For technical support, including 70T633S15BC8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70T633S15BC8 requirements.
6.How does Aetrix verify that 70T633S15BC8 is sourced from the original manufacturer or authorized distributors?
All 70T633S15BC8 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 70T633S15BC8 meets industry standards.
7.What is the process for return or replacement of 70T633S15BC8?
All 70T633S15BC8 units undergo pre-shipment inspection (PSI). If there is an issue with 70T633S15BC8, 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 70T633S15BC8 part is unused and in its original packaging.
Return procedure for 70T633S15BC8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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