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Renesas 70T633S15BC
- Part No.:
- 70T633S15BC
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 256-LBGA
- Datasheet:
-
70T633S15BC.pdf
- Description:
- IC SRAM 9MBIT PARALLEL 256CABGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,277
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Product details
Overview
70T633S15BC from Integrated Device Technology is a high-speed 512K × 18-bit asynchronous dual-port static RAM with true simultaneous access, 15 ns max access time, single 2.5 V core supply, and selectable 2.5 V/3.3 V I/O interface per port. It supports master/slave cascading for 36-bit+ systems and is used in real-time inter-processor communication, FPGA co-processing buffers, and telecom packet buffering.
For engineers reviewing the 70T633S15BC datasheet, 70T633S15BC pinout, 70T633S15BC application, or 70T633S15BC equivalent, key selection criteria include dual-port arbitration latency, RapidWrite Mode timing compliance, BUSY flag behavior in master/slave configuration, and BGA-256 thermal/mechanical layout constraints.
Technical Context
The 70T633S15BC implements fully asynchronous dual-port architecture with on-chip arbitration logic, independent CE0/CE1 enables per port, and hardware semaphore signaling across ports. It supports JTAG IEEE 1149.1 boundary scan in BGA-256 package and features separate byte controls (UBL/LBL, UBR/LBR) for bus-matching compatibility.
RapidWrite Mode eliminates R/W pulsing between consecutive writes by defining write end via address transition, requiring strict tAAS ≤ 1 ns and tARF ≥ 1.5 V/ns. Sleep mode (ZZL/ZZR) disables dynamic inputs except JTAG, while OPTL/OPTR independently configure each port's I/O voltage (2.5 V or 3.3 V) via VDDQX supply selection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 512K × 18 bits (9,216 Kbit), true dual-port SRAM cells enabling simultaneous read/write to same location |
| Access Time (tAA) | 15 ns max - defines minimum time from address valid to stable data output under commercial temperature range |
| Core Supply Voltage | 2.5 V ± 100 mV - powers internal logic; requires all VDD pins connected to 2.5 V rail |
| I/O Interface Voltage | Selectable 2.5 V or 3.3 V per port via OPTL/OPTR pins - sets VIH/VIL thresholds and VDDQX supply requirement |
| Operating Temperature | 0°C to +70°C (Commercial grade) - validated for stable operation without derating at full speed |
| Package | 256-ball BGA (17 mm × 17 mm, 1.0 mm pitch) - requires controlled-impedance PCB routing and thermal vias for power integrity |
| Power Consumption | Max 305 mA dynamic current (both ports active); 10 mA full standby (ISB3) with CMOS-level inputs |
Pinout & Package
70T633S15BC is housed in a 256-ball fine-pitch BGA (package code BC256/BCG256), with 17 mm × 17 mm body and 1.0 mm ball pitch. Pin functions are strictly segregated per port: left port (L) and right port (R) each have independent address (A0L–A18L / A0R–A18R), data I/O (I/O0L–I/O17L / I/O0R–I/O17R), control (CE0L/CE1L/R/WL/OEL/UBL/LBL / CE0R/CE1R/R/WR/OER/UBR/LBR), and status (BUSYL/INTL/SEML / BUSYR/INTR/SEMR) signals. Dedicated JTAG (TCK/TMS/TDI/TDO/TRST), sleep (ZZL/ZZR), and master/slave (M/S) pins support system-level debug and multi-device synchronization.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A18L | Left port address input | 19-bit address bus for 512K depth; A18L is functional (unlike IDT70T631) |
| I/O0L–I/O17L | Left port bidirectional data | 18-bit data path; lower byte (I/O0L–I/O8L) and upper byte (I/O9L–I/O17L) controlled by LBL/UBL |
| CE0L, CE1L | Left port chip enable pair | Active-low decode: CE0L = VIL & CE1L = VIH enables port; dual CE allows depth expansion without external logic |
| R/WL | Left port read/write control | Low = write, high = read; held low during RapidWrite Mode for back-to-back writes |
| BUSYL | Left port busy flag | Output when M/S = VIH (master); input when M/S = VIL (slave) - enables hardware arbitration in cascaded systems |
| OPTL | Left port I/O voltage select | VIL → 2.5 V I/O operation (VDDQL = 2.5 V); VIH → 3.3 V I/O operation (VDDQL = 3.3 V) |
| ZZL | Left port sleep mode | VIH asserts sleep: disables dynamic inputs except JTAG; OPTL, INTL, M/S remain functional |
| M/S | Master/slave select | VIH configures device as master (BUSY output); VIL configures as slave (BUSY input) - required for 36-bit+ expansion |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Enables concurrent, asynchronous access to identical memory locations from two independent buses - eliminates software arbitration overhead in inter-processor links |
| RapidWrite Mode | Allows consecutive write cycles without toggling R/W, CE, or byte enables - reduces control logic complexity and improves sustained write bandwidth at 15 ns cycle times |
| Hardware Semaphore Signaling | Eight dedicated flags accessible via A0–A2 address bits - provides atomic resource locking between ports without CPU intervention or external logic |
| Independent I/O Voltage Control | OPTL/OPTR pins let left and right ports operate at 2.5 V or 3.3 V simultaneously - simplifies interfacing with mixed-voltage SoCs or FPGAs |
| On-Chip Port Arbitration | Automatic resolution of simultaneous access conflicts using BUSY handshake - ensures deterministic data coherency in real-time systems |
Applications
| Telecom Packet Buffering | FPGA Co-Processing Memory |
|---|---|
|
Use Scenario: Storing incoming/outgoing Ethernet or SONET frames in line cards where ingress and egress paths require independent, low-latency memory access. IC Role / Device Role / Timing Role: Dual-port SRAM acts as shared buffer between MAC controller (left port) and traffic manager (right port), with BUSY flag preventing write collisions during frame forwarding. Use Value: 15 ns access time enables sub-100 ns round-trip latency for 64-byte packets; RapidWrite Mode accelerates bursty control-plane updates without stalling data-plane throughput. |
Use Scenario: Providing high-bandwidth scratchpad memory between an FPGA fabric and an external processor in embedded vision or radar processing systems. IC Role / Device Role / Timing Role: Left port interfaces FPGA logic for real-time DMA writes; right port serves ARM Cortex-A processor for firmware-driven reads - both operating asynchronously at full speed. Use Value: Independent 2.5 V/3.3 V I/O per port matches FPGA bank voltage and processor interface specs; JTAG support enables in-system debugging of memory transactions. |
| Real-Time Inter-Processor Communication | Industrial Motion Controller Buffer |
|
Use Scenario: Exchanging sensor fusion data and control commands between two microcontrollers in automotive ADAS ECUs where deterministic response is safety-critical. IC Role / Device Role / Timing Role: Acts as mailbox memory with hardware semaphores ensuring atomic flag updates; BUSY signal synchronizes write readiness between CPUs. Use Value: On-chip arbitration eliminates race conditions; 15 ns access guarantees worst-case 30 ns inter-CPU handshaking - meeting ASIL-B timing budgets. |
Use Scenario: Buffering position feedback and motion profile data between servo drives and a central motion controller in CNC machines. IC Role / Device Role / Timing Role: Left port receives encoder samples from drive interface; right port supplies interpolated trajectory points to motion engine - both running at 10–20 MHz update rates. Use Value: Sleep mode (ZZL/ZZR) reduces idle power to 10 mA; industrial-grade thermal margin (−40°C to +85°C) ensures reliability in cabinet-mounted enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C1362BV33-15ZXI | 3.3 V core + I/O; 15 ns access; 256-ball BGA but 15 mm × 15 mm, 0.8 mm pitch | Lacks RapidWrite Mode and hardware semaphore; requires external arbitration logic for multi-CPU use | Choose when system uses only 3.3 V rails and does not require atomic flag operations or back-to-back write optimization |
| AS7C331024B-15TIN | Single-port SRAM; 15 ns; 100-pin TQFP; 3.3 V only; no JTAG or sleep mode | No dual-port capability - necessitates external FIFOs or glue logic for inter-processor sharing | Choose only for cost-sensitive, non-concurrent-access applications where board space permits discrete arbitration circuitry |
Compared with CY7C1362BV33-15ZXI and AS7C331024B-15TIN, the 70T633S15BC delivers deterministic dual-port concurrency, integrated arbitration, and RapidWrite Mode - reducing BOM count and PCB layer count in real-time embedded systems where memory coherency and timing predictability are critical.
Availability
70T633S15BC is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, and automotive ADAS applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for 70T633S15BC 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 70T633S15BC belongs to IDT's high-speed asynchronous dual-port SRAM product line, engineered specifically for deterministic, low-latency inter-processor communication and real-time buffer applications in safety- and performance-critical systems.
FAQ
What is the maximum operating temperature range for the 70T633S15BC?
The 70T633S15BC is rated for commercial temperature range only: 0°C to +70°C. It is not qualified for industrial (−40°C to +85°C) operation - this is explicitly stated in the datasheet's Recommended Operating Conditions table and confirmed by AC timing specifications that list "Com'l Only" for the 15 ns speed grade. Using it outside 0°C–70°C may result in timing violations or data corruption.
Does the 70T633S15BC support JTAG boundary scan?
Yes, the 70T633S15BC supports IEEE 1149.1 JTAG boundary scan, but only in the BGA-256 package variant (BC256/BCG256). The pinout includes dedicated TCK, TMS, TDI, TDO, and TRST signals, and JTAG functionality remains active even during sleep mode (ZZL/ZZR asserted), though the datasheet recommends avoiding boundary scan during sleep for reliability.
How does RapidWrite Mode work on the 70T633S15BC?
RapidWrite Mode on the 70T633S15BC allows consecutive write cycles without pulsing R/W, CE, or byte enables between addresses. Write termination is triggered by the ending address transition, not R/W deassertion. This requires strict adherence to tAAS ≤ 1 ns (address skew) and tARF ≥ 1.5 V/ns (address slew rate) to prevent spurious writes - verified in the AC Electrical Characteristics table.
Can both ports of the 70T633S15BC operate at different I/O voltages?
Yes - OPTL and OPTR pins independently configure left and right port I/O voltage levels. Setting OPTL = VIL selects 2.5 V I/O (requiring VDDQL = 2.5 V), while OPTL = VIH selects 3.3 V I/O (requiring VDDQL = 3.3 V). The same applies to OPTR/VDDQR. This enables mixed-voltage interfacing, e.g., left port to a 2.5 V FPGA bank and right port to a 3.3 V microcontroller.
What is the function of the M/S pin on the 70T633S15BC?
The M/S (Master/Slave Select) pin configures the 70T633S15BC for cascaded 36-bit+ memory systems. When M/S = VIH, the device operates as master: BUSYL/BUSYR become outputs indicating port contention. When M/S = VIL, it operates as slave: BUSYL/BUSYR become inputs, allowing external arbitration. This pin is essential for depth/width expansion without external logic.
70T633S15BC 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:
- 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)
70T633S15BC FAQ
1.How can I place an order for 70T633S15BC through Aetrix?
Please submit a Request for Quotation (RFQ) for 70T633S15BC 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 70T633S15BC reliable?
The price and inventory of 70T633S15BC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70T633S15BC is usually 5 days.
3.What payment methods are accepted for 70T633S15BC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70T633S15BC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 70T633S15BC?
70T633S15BC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 70T633S15BC 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 70T633S15BC?
For technical support, including 70T633S15BC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70T633S15BC requirements.
6.How does Aetrix verify that 70T633S15BC is sourced from the original manufacturer or authorized distributors?
All 70T633S15BC 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 70T633S15BC meets industry standards.
7.What is the process for return or replacement of 70T633S15BC?
All 70T633S15BC units undergo pre-shipment inspection (PSI). If there is an issue with 70T633S15BC, 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 70T633S15BC part is unused and in its original packaging.
Return procedure for 70T633S15BC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
70T633S15BC Tags
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