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Renesas 7133SA35JI8
- Part No.:
- 7133SA35JI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
7133SA35JI8.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 68PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,374
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Product details
Overview
7133SA35JI8 from IDT is a high-speed 2K × 16-bit dual-port SRAM with master arbitration logic, 35 ns maximum read cycle time, TTL-compatible 5V ±10% operation, and industrial temperature range (–40°C to +85°C), used in real-time embedded systems requiring concurrent CPU/DSP memory access.
For engineers reviewing the 7133SA35JI8 datasheet, 7133SA35JI8 pinout, 7133SA35JI8 application, or 7133SA35JI8 equivalent, this page delivers verified timing specs, BUSY arbitration behavior, byte-select write control, power-down modes, and package-specific pin mapping for immediate design integration.
Technical Context
The 7133SA35JI8 implements fully asynchronous dual-port operation with independent left/right address, control, and I/O buses. Its on-chip arbitration logic resolves port contention via open-drain BUSYL/BUSYR outputs and supports MASTER/SLAVE expansion for 32-bit+ data width without external logic.
It features separate upper/lower byte write enables (R/WLUB/R/WLLB and R/WRUB/R/WRLB), TTL-level compatibility, battery backup data retention at 2V, and four standby current modes (ISB1–ISB4) controlled by CE polarity and input voltage thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2,048 × 16 bits (32 KB total); enables compact dual-processor buffer sharing without external multiplexing. |
| Max Read Cycle Time | 35 ns (industrial grade); guarantees deterministic latency for real-time DSP or motion control loop buffers. |
| Supply Voltage | 5.0 V ±10%; operates directly from standard logic rails-no LDO required for system-level 5V domains. |
| Operating Temperature | –40°C to +85°C; qualified for industrial automation, motor drives, and telecom line cards. |
| Active Current (Typ.) | 240 mA (both ports active, f = fMAX); enables accurate thermal budgeting in dense PCB layouts. |
| Standby Current (ISB3) | 0.2 mA (full CMOS standby); supports low-power sleep states while retaining RAM contents. |
| Data Retention | 2 V minimum VCC; maintains memory state during brown-out or battery-backup operation. |
Pinout & Package
7133SA35JI8 is packaged in a 68-pin PLCC (PLG68), with dual-port symmetry: left port (L) and right port (R) each provide independent A0–A10, I/O0–I/O15, CEL/CER, R/WLUB/R/WLLB & R/WRUB/R/WRLB, OEL/OER, and BUSYL/BUSYR signals. Both VCC and GND pins must be connected for reliable operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Active-low enable per port; controls port activation and automatic power-down when HIGH. |
| R/WLUB / R/WRUB | Upper Byte Write Enable (L/R) | Independent write control for I/O8–I/O15; enables byte-granular writes without masking logic. |
| R/WLLB / R/WRLB | Lower Byte Write Enable (L/R) | Independent write control for I/O0–I/O7; supports mixed-endian or partial-word updates. |
| OEL / OER | Output Enable (L/R) | Tri-states I/O bus independently per port; allows shared bus architectures with external arbitration. |
| BUSYL / BUSYR | Busy Flag (L/R) | Open-drain output (MASTER) or input (SLAVE); signals port contention and gates write cycles during conflict. |
| A0L–A10L / A0R–A10R | Address Inputs (L/R) | 11-bit address per port; decodes full 2K × 16 space; no external address latching needed. |
| I/O0L–I/O15L / I/O0R–I/O15R | Data I/O (L/R) | Bidirectional 16-bit data bus per port; supports simultaneous read/write across ports with arbitration. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip port arbitration logic | Resolves simultaneous access to same address without external logic; eliminates risk of data corruption in multi-CPU systems. |
| Separate upper/lower byte write control | Enables atomic 8-bit updates to either half of 16-bit word-critical for protocol stack buffers and register-mapped peripherals. |
| Master/Slave expansion capability | One 7133SA35JI8 (MASTER) + multiple 7143SA35JI8 (SLAVE) enables 32-bit+ data width with single-point arbitration and no "busy lock-out". |
| 2V data retention mode | Maintains valid memory contents during main supply dropout; supports graceful shutdown and fast resume in battery-backed systems. |
| Four-tier standby current control | ISB1–ISB4 modes allow precise power optimization: full CMOS standby (0.2 mA), TTL-level standby (25 mA), or mixed-port disable states. |
Applications
| Industrial Motion Control | DSP-Based Signal Processing |
|---|---|
|
Use Scenario: Real-time servo loop running on dual-core controller-one core handles position calculation, the other manages PWM generation and feedback sampling. IC Role / Device Role / Timing Role: Dual-port SRAM acts as synchronized data exchange buffer between cores; left port writes sensor data, right port reads interpolated setpoints. Use Value: 35 ns access ensures sub-µs latency for closed-loop updates; BUSY arbitration prevents race conditions during simultaneous buffer access. |
Use Scenario: Radar baseband processor using two ADSP-21000 DSPs-one performs FFT, the other handles CFAR detection-sharing intermediate results. IC Role / Device Role / Timing Role: 7133SA35JI8 serves as zero-wait-state shared memory; left port feeds FFT output, right port consumes it for thresholding. Use Value: Asynchronous dual-port operation eliminates pipeline stalls; byte-select writes reduce bus traffic when updating only magnitude or phase arrays. |
| Telecom Line Card Buffering | Avionics Data Acquisition |
|
Use Scenario: T1/E1 framer ASIC and ARM host processor share packet metadata and status registers in a modular line card. IC Role / Device Role / Timing Role: 7133SA35JI8 provides non-blocking access to descriptor rings and statistics counters; left port for ASIC, right for ARM. Use Value: Industrial temp rating (–40°C to +85°C) ensures reliability in uncooled chassis; 5V tolerance matches legacy telecom power domains. |
Use Scenario: Flight data recorder acquiring analog sensor streams via ADC and storing timestamped samples for post-flight analysis. IC Role / Device Role / Timing Role: Acts as high-speed circular buffer-left port accepts streaming ADC data, right port transfers completed frames to flash via DMA. Use Value: 2V data retention preserves last 2K samples during power loss; BUSY flag synchronizes frame boundary handoff to avoid partial writes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 7133SA25JI8 | 25 ns max read cycle; higher speed grade but identical pinout, voltage, and temperature range. | Suitable where tighter loop timing demands <25 ns latency; requires validation of downstream timing margins. | Select when system clock domain or bus interface requires faster access than 35 ns permits. |
| 7133LA35JI8 | Same 35 ns timing but LA variant: lower active power (1050 mW typ. vs. 1150 mW) and 1 µW standby (vs. 5 µW); retains data at 2V. | Preferred in battery-powered or thermally constrained environments where power efficiency outweighs marginal speed gain. | Choose for portable test equipment or remote sensors needing extended battery life without sacrificing timing performance. |
Compared with 7133SA25JI8, the 7133SA35JI8 trades 10 ns of speed for broader timing margin and lower cost; compared with 7133LA35JI8, it offers higher active drive strength at the expense of 4 µW higher standby current-critical for always-on industrial controllers.
Availability
7133SA35JI8 is available at Aetrix Electronics and suitable for industrial motion control, telecom line card buffering, and avionics data acquisition requiring stable component supply across extended production lifecycles.
Supply support for 7133SA35JI8 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, and RF solutions, now part of Renesas Electronics.
The IDT7133 family was designed as high-reliability dual-port SRAMs for real-time embedded systems demanding concurrent access, hardware arbitration, and industrial-grade environmental resilience.
FAQ
What is the operating temperature range for the 7133SA35JI8?
7133SA35JI8 is rated for industrial temperature operation from –40°C to +85°C. This specification is confirmed in the Absolute Maximum Ratings table and supported by DC/AC electrical characteristics tested across that range. The 'I' suffix in the part number explicitly denotes industrial grade, distinguishing it from commercial (C) or military (M) variants.
Does the 7133SA35JI8 include on-chip arbitration logic?
Yes, the 7133SA35JI8 includes dedicated on-chip arbitration logic-specifically, it functions as the MASTER device in IDT's MASTER/SLAVE dual-port architecture. This logic generates BUSYL/BUSYR outputs to resolve port contention and is absent in the SLAVE-only 7143 series. The functional block diagram and description confirm arbitration logic is present only in IDT7133 devices.
What is the maximum read cycle time specified for the 7133SA35JI8?
The maximum read cycle time for the 7133SA35JI8 is 35 ns, as stated in the Features section and confirmed in AC Electrical Characteristics Table 10a under the 7133X35 row. This value applies across the full industrial temperature range and is measured under standard AC test conditions with VCC = 5.0 V ±10%.
How does the BUSY signal function on the 7133SA35JI8?
On the 7133SA35JI8, BUSYL and BUSYR are open-drain output signals indicating port contention. When both ports access the same address simultaneously, the arbitration logic asserts BUSY to stall the later-accessing port. These outputs require external pull-up resistors, as explicitly noted in the Functional Block Diagram footnote and Pin Names table.
Is the 7133SA35JI8 pin-compatible with other members of the IDT7133/7143 family?
Yes, the 7133SA35JI8 shares identical pinout with all IDT7133/7143 variants-including different speed grades (e.g., 20 ns, 25 ns) and power types (SA/LA)-across all supported packages (68-pin PLCC, PGA, flatpack, and 100-pin TQFP). The datasheet states: "The IDT7133/7143 devices have identical pinouts," enabling drop-in replacement within the same package footprint.
7133SA35JI8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 68-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Asynchronous
- Memory Size:
- 32Kbit
- Memory Organization:
- 2K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 35ns
- Access Time:
- 35 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 68-PLCC (24.21x24.21)
7133SA35JI8 FAQ
1.How can I place an order for 7133SA35JI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7133SA35JI8 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 7133SA35JI8 reliable?
The price and inventory of 7133SA35JI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7133SA35JI8 is usually 5 days.
3.What payment methods are accepted for 7133SA35JI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7133SA35JI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7133SA35JI8?
7133SA35JI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7133SA35JI8 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 7133SA35JI8?
For technical support, including 7133SA35JI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7133SA35JI8 requirements.
6.How does Aetrix verify that 7133SA35JI8 is sourced from the original manufacturer or authorized distributors?
All 7133SA35JI8 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 7133SA35JI8 meets industry standards.
7.What is the process for return or replacement of 7133SA35JI8?
All 7133SA35JI8 units undergo pre-shipment inspection (PSI). If there is an issue with 7133SA35JI8, 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 7133SA35JI8 part is unused and in its original packaging.
Return procedure for 7133SA35JI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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