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Renesas 7133SA90J8
- Part No.:
- 7133SA90J8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
7133SA90J8.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 68PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,679
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Product details
Overview
7133SA90J8 from IDT is a high-speed 2K × 16 dual-port static RAM with master arbitration logic, 90ns max read cycle time, TTL-compatible 5V ±10% operation, and industrial temperature range (–40°C to +85°C). It enables simultaneous independent access from two asynchronous ports and supports 32-bit+ bus expansion via MASTER/SLAVE configuration with IDT7143 in real-time control systems.
For engineers reviewing the 7133SA90J8 datasheet, 7133SA90J8 pinout, 7133SA90J8 application, or 7133SA90J8 equivalent, key selection criteria include BUSY arbitration timing (tBDD ≤ 35ns), byte-selectable write control (R/WLUB/R/WLLB), dual-port data retention at 2V, and compatibility with 68-pin PLCC packaging for legacy industrial PCB layouts.
Technical Context
The 7133SA90J8 implements on-chip port arbitration logic exclusively in MASTER mode, generating open-drain BUSYL/BUSYR outputs requiring external pull-up resistors. Its dual independent ports support fully asynchronous reads/writes with separate address (A0L–A10L / A0R–A10R), control (CEL/CER, R/WLUB/R/WLLB, OEL/OER), and 16-bit I/O buses (I/O0L–I/O15L / I/O0R–I/O15R).
It features byte-level write enable per port, automatic power-down via chip enable (ISB3 ≤ 0.2mA full standby), and battery backup data retention at VCC = 2V. The device is fabricated in CMOS technology and complies with MIL-PRF-38535 QML for military-grade reliability when ordered in appropriate grade variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 16 bits (32,768 bits total); supports independent 16-bit word access per port |
| Max Read Cycle Time | 90ns - defines minimum clock period for synchronous interface or maximum burst rate in async controllers |
| Supply Voltage | 5.0V ±10% - compatible with legacy 5V TTL logic families without level-shifting |
| Operating Temperature | –40°C to +85°C - qualified for industrial embedded environments including motor drives and PLCs |
| Standby Current (ISB3) | 0.2mA typ. - enables low-power hold mode during CPU idle cycles without data loss |
| Data Retention Voltage | 2.0V min. - maintains memory state during brown-out or backup battery operation |
| Arbitration tBDD | ≤35ns - ensures deterministic resolution of port contention before valid read data appears |
Pinout & Package
7133SA90J8 is packaged in a 68-pin PLCC (Plastic Leaded Chip Carrier) with 0.05-inch lead pitch, body size ≈ 0.95 in × 0.95 in × 0.17 in. Both VCC and GND pins are duplicated (pins 17 & 51, pins 26 & 61) and must be connected for reliable operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Active-low port selection; controls power-down mode and output drivers independently |
| R/WLUB / R/WLLB R/WRUB / R/WRLB | Upper/Lower Byte Write Enable | Enables byte-granular writes per port - critical for mixed-endian or partial-word updates |
| OEL / OER | Output Enable (Left / Right) | Tri-states I/O bus independently of CE; allows shared data bus with other peripherals |
| BUSYL / BUSYR | Busy Flag (Open Drain Output) | Signals port contention; requires external pull-up; used for hardware flow control or interrupt generation |
| A0L–A10L / A0R–A10R | Address Inputs (11-bit) | Decodes 2K addresses per port; no internal address latching - fully combinatorial |
| I/O0L–I/O15L / I/O0R–I/O15R | Bi-directional Data Bus (16-bit) | True dual-port I/O - no multiplexing; supports concurrent read/write across ports |
Key Features
| Feature | Design Value |
|---|---|
| On-chip arbitration logic | Eliminates need for external priority encoder in MASTER configuration; resolves same-address contention deterministically |
| Separate upper/lower byte write control | Enables atomic 8-bit updates without disturbing adjacent bytes - essential for register-mapped peripherals |
| 2V data retention | Preserves memory contents during main power failure using backup battery or capacitor hold-up |
| TTL-compatible I/O | Direct interfacing with 5V microcontrollers, FPGAs, and ASICs without level translators or bus buffers |
| 68-pin PLCC package | Surface-mount compatible with proven reflow profiles; suitable for high-reliability industrial assembly |
Applications
| Industrial Motion Controller | Avionics Display Buffer |
|---|---|
Use Scenario: Real-time coordination between motion CPU and FPGA-based servo driver using shared memory for position setpoints and status feedback. IC Role / Device Role / Timing Role: Dual-port RAM acts as deterministic inter-processor communication channel with hardware BUSY arbitration preventing race conditions on joint memory locations. Use Value: 90ns access enables sub-100µs loop update rates; byte-write enables independent update of velocity vs. acceleration fields without lock overhead. |
Use Scenario: Frame buffer coherency between graphics processor and flight management system in multi-display cockpit systems. IC Role / Device Role / Timing Role: MASTER 7133SA90J8 arbitrates simultaneous pixel writes from GPU and overlay updates from FMS, ensuring flicker-free rendering. Use Value: Open-drain BUSY outputs interface directly to FPGA interrupt inputs; 2V retention preserves last known display state during power transition. |
| Telecom Line Card Buffer | Medical Imaging Data Pipeline |
Use Scenario: Packet buffering between network processor and DSP in TDM-over-IP gateways handling E1/T1 traffic. IC Role / Device Role / Timing Role: Left port handles packet ingress from PHY; right port feeds DSP for jitter correction - both operating asynchronously at line rate. Use Value: 16-bit width matches standard telecom data paths; 90ns cycle supports >10MB/s sustained throughput per port. |
Use Scenario: Real-time transfer of reconstructed CT scan slices between acquisition FPGA and display controller in portable imaging units. IC Role / Device Role / Timing Role: Dual-port RAM decouples high-speed ADC capture (left port) from GUI rendering (right port), eliminating software buffering latency. Use Value: Industrial temp rating ensures stable operation inside sealed medical enclosures; byte-write enables partial slice updates without full-frame reload. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT7143SA90J8 | SLAVE-only variant; BUSY pins are inputs only; no on-chip arbitration logic | Used only in width-expanded systems with external MASTER; cannot operate stand-alone as arbitrator | Select when building 32-bit+ bus with 7133SA90J8 as MASTER; not interchangeable in single-chip designs |
| CY7C133-90JC | 90ns 2K×16 dual-port; no built-in BUSY arbitration; requires external logic for contention resolution | Suitable for simpler dual-CPU systems where software manages memory access order | Choose when cost sensitivity outweighs need for hardware arbitration; requires additional gates and PCB area |
Compared with IDT7143SA90J8 and CY7C133-90JC, the 7133SA90J8 uniquely integrates master arbitration logic and open-drain BUSY signaling - enabling drop-in deterministic contention resolution without external components in industrial control and avionics applications.
Availability
7133SA90J8 is available at Aetrix Electronics and suitable for industrial motion control, avionics display subsystems, and telecom line card designs requiring stable component supply, long-lifecycle support, and verified MIL-PRF-38535 compliance for harsh-environment deployment.
Supply support for 7133SA90J8 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 fabless semiconductor company specializing in timing, memory interface, and RF solutions, now part of Renesas Electronics since 2019.
The IDT7133/7143 family was designed specifically for deterministic real-time inter-processor communication in industrial automation, defense systems, and telecom infrastructure where hardware-arbitrated dual-port memory eliminates software synchronization overhead.
FAQ
What is the function of the BUSY pins on the 7133SA90J8?
The BUSYL and BUSYR pins on the 7133SA90J8 are open-drain outputs that signal port contention when both ports attempt simultaneous access to the same memory location. They require external pull-up resistors and are used to stall the contending port's access until resolution. This hardware arbitration eliminates race conditions in real-time systems without software intervention - a core capability distinguishing the 7133SA90J8 from SLAVE-only variants like IDT7143SA90J8.
Can the 7133SA90J8 operate with a 3.3V supply?
No, the 7133SA90J8 is specified only for 5.0V ±10% (4.5V to 5.5V) operation and is TTL-compatible. It does not support 3.3V supply rails. Attempting to power it at 3.3V will result in undefined behavior, failed data retention, and potential I/O incompatibility with connected 5V logic. For 3.3V systems, designers must use level translators or select a modern low-voltage dual-port SRAM such as the IDT70V25/70V26 series.
How does the 7133SA90J8 support data bus width expansion to 32 bits or more?
The 7133SA90J8 serves as the MASTER in a MASTER/SLAVE configuration with IDT7143 devices. Its on-chip arbitration logic generates BUSY signals that inhibit writes on SLAVE devices during contention, ensuring deterministic 32-bit+ operation without external logic. This architecture avoids "Busy Lock-Out" by centralizing arbitration - a key design advantage over discrete arbitration solutions. The 7133SA90J8's pinout and timing are explicitly optimized for this role.
What is the significance of the 'J8' suffix in 7133SA90J8?
The 'J8' suffix in 7133SA90J8 denotes the 68-pin PLCC package variant with industrial temperature range (–40°C to +85°C) and lead-free (RoHS-compliant) finish. It is distinct from 'JG' (ceramic PGA), 'JD' (flatpack), and 'JQ' (100-pin TQFP) variants. The 'SA' prefix indicates standard-power operation (vs. 'LA' for low-power), and '90' specifies the 90ns maximum access speed grade.
Does the 7133SA90J8 support battery backup operation?
Yes, the 7133SA90J8 supports battery backup operation with guaranteed data retention at VCC = 2.0V (minimum), consuming ≤4000µA typical in retention mode. This feature enables nonvolatile storage during main power loss in applications such as industrial HMIs and avionics displays. Retention current is characterized across the industrial temperature range and does not require external circuitry beyond a backup voltage source.
7133SA90J8 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:
- 90ns
- Access Time:
- 90 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 68-PLCC (24.21x24.21)
7133SA90J8 FAQ
1.How can I place an order for 7133SA90J8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7133SA90J8 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 7133SA90J8 reliable?
The price and inventory of 7133SA90J8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7133SA90J8 is usually 5 days.
3.What payment methods are accepted for 7133SA90J8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7133SA90J8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7133SA90J8?
7133SA90J8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7133SA90J8 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 7133SA90J8?
For technical support, including 7133SA90J8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7133SA90J8 requirements.
6.How does Aetrix verify that 7133SA90J8 is sourced from the original manufacturer or authorized distributors?
All 7133SA90J8 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 7133SA90J8 meets industry standards.
7.What is the process for return or replacement of 7133SA90J8?
All 7133SA90J8 units undergo pre-shipment inspection (PSI). If there is an issue with 7133SA90J8, 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 7133SA90J8 part is unused and in its original packaging.
Return procedure for 7133SA90J8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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