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Renesas 70T633S12BFI8
- Part No.:
- 70T633S12BFI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 208-LFBGA
- Datasheet:
-
70T633S12BFI8.pdf
- Description:
- IC SRAM 9MBIT PARALLEL 208CABGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,499
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Product details
Overview
70T633S12BFI8 from IDT (now Renesas) is a high-speed 512K × 18-bit asynchronous dual-port static RAM with independent left/right ports, 12 ns max access time, 2.5V core supply, and selectable 2.5V/3.3V I/O interface per port. It enables simultaneous read/write to the same memory location and supports RapidWrite Mode for back-to-back writes-used in real-time DSP co-processing, FPGA-based data buffering, and telecom packet switching systems.
For engineers reviewing the 70T633S12BFI8 datasheet, 70T633S12BFI8 pinout, 70T633S12BFI8 application, or 70T633S12BFI8 equivalent, key selection criteria include true dual-port arbitration logic, on-chip semaphore signaling, JTAG IEEE 1149.1 compliance (BGA-256), industrial temperature support (–40°C to +85°C), and 256-ball BGA package with 1.0 mm pitch.
Technical Context
This device implements fully asynchronous operation: each port has independent address, control, and I/O buses with no clock required. Port arbitration is handled entirely on-chip via hardware semaphore logic and BUSY flag signaling between master/slave configurations.
It supports mixed-voltage I/O: OPTL/OPTR pins configure each port's VDDQ supply (2.5V or 3.3V), while VDD remains fixed at 2.5V ±100 mV. Sleep mode (ZZL/ZZR) disables dynamic inputs except JTAG, enabling ultra-low ISB3 standby current (2–10 mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 512K × 18 bits (9,216 Kbit); supports depth expansion to 36+ bits via Master/Slave cascading |
| Access Time | 12 ns max (industrial & commercial); defines minimum cycle time for reliable read setup |
| Core Supply | 2.5V ±100 mV; powers internal logic and memory array; requires all VDD pins tied to 2.5V |
| I/O Voltage | Selectable 2.5V or 3.3V per port via OPTL/OPTR; VDDQL/VDDQR must match selected level |
| Operating Temp | –40°C to +85°C (industrial grade); validated across full range for stable timing and leakage |
| Package | 256-ball BGA (BC256/BCG256); 17 mm × 17 mm × 1.4 mm body, 1.0 mm ball pitch |
| JTAG Support | IEEE 1149.1 compliant in BGA-256 package only; includes TCK, TMS, TDI, TDO, TRST |
Pinout & Package
256-ball fine-pitch BGA (BC256/BCG256), 17 mm × 17 mm × 1.4 mm, 1.0 mm ball pitch. All VDD pins require 2.5V; VDDQL/VDDQR depend on OPTL/OPTR configuration; VSS pins must be grounded.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A18L / A0R–A18R | Address Inputs | 19-bit address per port; A18X is NC for IDT70T631 but functional for 70T633 |
| I/O0L–I/O17L / I/O0R–I/O17R | Bidirectional Data Bus | 18-bit parallel I/O per port; supports byte-wide (LBL/LBR, UBL/UBR) or full-word access |
| CE0L/CE1L, CE0R/CE1R | Chip Enables | Dual CE per port enables depth expansion without external logic; CE0=VIL & CE1=VIH = active |
| R/WL, R/WR | Read/Write Control | Active-low; controls direction of data flow; held low during RapidWrite Mode for consecutive writes |
| OEL, OER | Output Enable | Tri-states outputs when high; used with UB/LB to select upper/lower byte output drivers |
| BUSYL, BUSYR | Busy Flag | Output when M/S=VIH (Master); input when M/S=VIL (Slave); signals port contention during simultaneous access |
| SEML, SEMR | Semaphore Enable | Enables 8-bit semaphore register access (A0–A2); allows inter-port synchronization without software overhead |
| OPTL, OPTR | I/O Voltage Select | Set to VDD (2.5V) → 3.3V I/O; set to VSS (0V) → 2.5V I/O; configures VDDQL/VDDQR voltage level |
| ZZL, ZZR | Sleep Mode Input | Asserted high disables dynamic inputs (except JTAG); reduces ICC to ≤10 mA in ISB3/IZZ modes |
| M/S | Master/Slave Select | VIH = BUSY output (Master); VIL = BUSY input (Slave); enables cascaded 36+ bit memory systems |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Simultaneous independent read/write to identical memory locations-enables lock-free inter-processor communication |
| RapidWrite Mode | Eliminates need to toggle R/W or CE between consecutive writes; reduces control logic complexity and timing margin pressure at 12 ns cycles |
| On-Chip Semaphore Logic | Hardware-managed 8-bit semaphore flags (A0–A2) accessible via I/O bus-avoids external arbitration ICs or polling loops |
| Configurable I/O Voltage | Per-port 2.5V/3.3V interface via OPT pins-allows seamless integration with mixed-voltage SoCs, FPGAs, or legacy 3.3V peripherals |
| JTAG Boundary Scan | IEEE 1149.1 support in BGA-256 package-enables in-system testability and debug without additional test points |
Applications
| Telecom Packet Buffering | FPGA-Based Real-Time Signal Processing |
|---|---|
Use Scenario: Storing incoming/outgoing Ethernet or SONET frames in line cards where ingress and egress paths operate independently. IC Role / Device Role / Timing Role: Dual-port SRAM acts as ping-pong buffer-left port accepts packets while right port forwards processed data, synchronized via BUSY/SEM flags. Use Value: Eliminates external arbitration logic and guarantees deterministic latency (<12 ns access) for jitter-sensitive voice/video traffic. | Use Scenario: Feeding streaming sensor data (e.g., radar ADC samples) into FPGA FFT engines while simultaneously writing results to host memory. IC Role / Device Role / Timing Role: Left port interfaces FPGA fabric for high-throughput write; right port connects to PCIe or AXI bus for DMA reads-both operating asynchronously. Use Value: Enables zero-wait-state data handoff between processing and I/O domains, sustaining >83 MHz sustained bandwidth (12 ns cycle). |
| Industrial Motion Controller Memory | Avionics Display Frame Buffer |
Use Scenario: Coordinating servo motor position updates and safety-critical feedback loops in multi-axis CNC controllers. IC Role / Device Role / Timing Role: MCU writes motion profiles to left port; dedicated motion ASIC reads and executes from right port-semaphores coordinate state transitions. Use Value: Hardware semaphore signaling ensures atomic profile swaps without CPU intervention, meeting SIL-3 timing determinism requirements. | Use Scenario: Holding rendered graphics frames for cockpit displays where GPU and display controller operate on separate clocks. IC Role / Device Role / Timing Role: GPU writes completed frame to left port; display controller reads from right port-BUSY flag prevents tearing during partial updates. Use Value: Industrial temp rating (–40°C to +85°C) and 256-ball BGA ensure reliability in sealed avionics enclosures with no thermal derating needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C1372KV18 | 4M × 18 density, 10 ns access, 3.3V core, no RapidWrite Mode, supports QDR-II interface | Higher density and speed but lacks sleep mode and per-port I/O voltage flexibility | Preferred for bandwidth-constrained systems needing >512K depth; not drop-in due to different pinout and voltage architecture |
| AS7C3316PFS25 | 32K × 18 density, 25 ns access, 3.3V-only I/O, no JTAG or semaphore logic | Lower cost and simpler interface but no hardware arbitration or mixed-voltage support | Used in non-real-time embedded systems where latency and inter-port coordination are not critical |
Compared with CY7C1372KV18 and AS7C3316PFS25, the 70T633S12BFI8 uniquely balances industrial-grade reliability, per-port voltage configurability, and hardware semaphore support-making it optimal for deterministic, mixed-voltage, real-time dual-processor architectures.
Availability
70T633S12BFI8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, aerospace display systems, and FPGA-based signal processing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 70T633S12BFI8 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), now part of Renesas Electronics, designs high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.
The 70T633S12BFI8 belongs to IDT's high-speed asynchronous dual-port SRAM product line, engineered specifically for deterministic, low-latency inter-processor data exchange in real-time embedded systems.
FAQ
What is the maximum supported operating temperature for the 70T633S12BFI8?
The 70T633S12BFI8 is rated for industrial temperature operation from –40°C to +85°C. This specification is validated across all electrical parameters including access time (12 ns max), standby current (ISB1–ISB4), and I/O voltage margins. The device uses a 256-ball BGA package qualified for thermal cycling within this range, with no derating required up to +85°C ambient under specified DC and AC conditions.
Does the 70T633S12BFI8 support both 2.5V and 3.3V I/O on the same device?
Yes-the 70T633S12BFI8 supports independent I/O voltage selection per port via OPTL and OPTR pins. Setting OPTL to VDD (2.5V) configures the left port for 3.3V I/O (requiring VDDQL = 3.3V), while setting OPTR to VSS (0V) configures the right port for 2.5V I/O (requiring VDDQR = 2.5V). This enables mixed-voltage system interfacing without level shifters.
How does RapidWrite Mode function in the 70T633S12BFI8?
RapidWrite Mode in the 70T633S12BFI8 allows consecutive write operations without toggling R/W, CE, or byte enables between cycles. The write cycle end is defined by the *next* address transition-not R/W deassertion-reducing control timing constraints. Address skew (tAAS ≤1 ns) and rise/fall time (tARF ≥1.5 V/ns) must be met to prevent spurious writes during transitions.
Is JTAG boundary scan available on the 70T633S12BFI8?
Yes-JTAG IEEE 1149.1 support is implemented in the 70T633S12BFI8 when packaged in the 256-ball BGA (BC256/BCG256). Pins TCK, TMS, TDI, TDO, and TRST are dedicated and functional. JTAG remains operational during sleep mode (ZZ asserted), but boundary scan is not recommended in that state per datasheet guidance.
What is the role of the BUSY pin in master/slave configuration of the 70T633S12BFI8?
In master/slave configuration, BUSYL/BUSYR serves dual roles: when M/S = VIH (Master), BUSY is an output indicating port contention during simultaneous access to the same address; when M/S = VIL (Slave), BUSY is an input monitored by the slave to defer writes until the master releases the resource-enabling hardware-coordinated memory sharing without software polling.
70T633S12BFI8 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:
- 512K x 18
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 12ns
- Access Time:
- 12 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)
70T633S12BFI8 FAQ
1.How can I place an order for 70T633S12BFI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 70T633S12BFI8 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 70T633S12BFI8 reliable?
The price and inventory of 70T633S12BFI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70T633S12BFI8 is usually 5 days.
3.What payment methods are accepted for 70T633S12BFI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70T633S12BFI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 70T633S12BFI8?
70T633S12BFI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 70T633S12BFI8 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 70T633S12BFI8?
For technical support, including 70T633S12BFI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70T633S12BFI8 requirements.
6.How does Aetrix verify that 70T633S12BFI8 is sourced from the original manufacturer or authorized distributors?
All 70T633S12BFI8 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 70T633S12BFI8 meets industry standards.
7.What is the process for return or replacement of 70T633S12BFI8?
All 70T633S12BFI8 units undergo pre-shipment inspection (PSI). If there is an issue with 70T633S12BFI8, 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 70T633S12BFI8 part is unused and in its original packaging.
Return procedure for 70T633S12BFI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
70T633S12BFI8 Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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