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Renesas 7133SA70JI8
- Part No.:
- 7133SA70JI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
7133SA70JI8.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 68PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,850
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Product details
Overview
7133SA70JI8 from IDT (Integrated Device Technology) is a high-speed 2K × 16 dual-port static RAM configured as a MASTER device with on-chip arbitration logic, 70 ns maximum read cycle time, industrial temperature range (–40°C to +85°C), and TTL-compatible 5V ±10% single-supply operation. It enables error-free 32-bit-or-wider memory expansion when paired with IDT7143 SLAVE devices in real-time embedded control systems.
For engineers reviewing the 7133SA70JI8 datasheet, 7133SA70JI8 pinout, 7133SA70JI8 application, or 7133SA70JI8 equivalent, key selection criteria include BUSY arbitration timing (tBDD ≤ 40 ns), dual-port asynchronous access latency, byte-selectable write control (R/WLUB/R/WLLB), battery backup capability (2V data retention), and 68-pin PLCC package compatibility with legacy military/industrial PCB layouts.
Technical Context
The 7133SA70JI8 implements fully asynchronous dual-port architecture with independent left/right address, control, and I/O buses - enabling concurrent read/write operations without internal synchronization overhead. Its on-chip arbitration logic resolves port contention via open-drain BUSYL/BUSYR outputs requiring external pull-up resistors.
As a MASTER device, it generates BUSY flags for both ports during address-matching contention and supports width expansion by driving BUSY inputs of IDT7143 SLAVE devices. It features separate upper/lower byte write enables per port and automatic power-down via chip enable (CE) control, reducing standby current to 1.0 mA (typ.) under CMOS-level inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 2K × 16 (32,768 bits), dual-port SRAM with independent left/right access paths |
| Max Read Cycle Time | 70 ns - defines minimum time between successive reads on same port; critical for real-time interrupt servicing |
| Operating Voltage | 5.0 V ±10% - single TTL-compatible supply; no auxiliary voltage rails required |
| Temperature Range | –40°C to +85°C - qualified for industrial environments including motor drives and PLCs |
| Standby Current (ISB3) | 1.0 mA (typ.) - achieved when both CE pins held > VCC – 0.2 V; enables low-power sleep modes |
| Data Retention | 2 V minimum - retains memory contents during brownout or backup-battery operation |
| Package | 68-pin PLCC (PLG68) - surface-mount compatible with standard reflow profiles and legacy repair workflows |
Pinout & Package
68-pin Plastic Leaded Chip Carrier (PLCC, package code PLG68), body size ≈ 0.95 in × 0.95 in × 0.17 in. Requires connection of both VCC and GND pins for reliable operation per datasheet Note 1 & 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Active-low port selection; controls power-down mode and arbitration activation |
| R/WLUB / R/WRUB | Upper Byte Write Enable (Left / Right) | Enables write to I/O8–I/O15; allows byte-granular memory updates without disturbing lower byte |
| R/WLLB / R/WRLB | Lower Byte Write Enable (Left / Right) | Enables write to I/O0–I/O7; supports mixed-mode data writes in 16-bit systems |
| OEL / OER | Output Enable (Left / Right) | Controls tri-state output drivers; decouples bus loading during inactive cycles |
| BUSYL / BUSYR | Busy Flag (Left / Right) | Open-drain output (MASTER only); signals port contention; requires external pull-up resistor |
| A0L–A10L / A0R–A10R | Address Inputs (Left / Right) | 11-bit address bus per port; selects one of 2K locations independently |
| I/O0L–I/O15L / I/O0R–I/O15R | Data I/O (Left / Right) | 16-bit bidirectional data path per port; supports simultaneous read/write across ports |
Key Features
| Feature | Design Value |
|---|---|
| On-chip arbitration logic | Resolves simultaneous access to identical addresses without external logic; eliminates "busy lock-out" in multi-chip width-expansion configurations |
| Byte-selectable write control | Independent R/WLUB/R/WLLB and R/WRUB/R/WRLB enables allow partial-word writes - essential for protocol stack buffer management |
| 2V data retention | Maintains stored data during main power loss using backup battery; validated at TA = +25°C per Table 8 |
| TTL-compatible interface | Direct interfacing with 5V microcontrollers, FPGAs, and ASICs without level-shifting circuitry |
| Master/Slave expansion support | Enables seamless 32-bit+ word width systems using one 7133SA70JI8 MASTER and multiple IDT7143 SLAVE devices |
Applications
| Real-Time Motor Control | Digital Signal Processor (DSP) Co-Processing |
|---|---|
Use Scenario: Simultaneous position feedback capture (left port) and PWM command generation (right port) in servo drive firmware. IC Role / Device Role / Timing Role: Dual-port RAM acts as synchronized data exchange buffer between motion controller CPU and field-oriented control (FOC) hardware accelerator. Use Value: Eliminates software polling delays; 70 ns access ensures sub-microsecond latency for closed-loop current regulation. |
Use Scenario: Shared memory between host ARM processor and TI C6000-series DSP executing FFT-based spectral analysis. IC Role / Device Role / Timing Role: Provides zero-wait-state memory window for DMA transfers and real-time interrupt handling across heterogeneous processors. Use Value: Enables deterministic 16-bit sample exchange at ≥10 MSPS without bus arbitration overhead or FIFO bottlenecks. |
| Industrial PLC I/O Module | Military Avionics Data Logger |
Use Scenario: Concurrent scan of discrete input states (left port) and update of analog output registers (right port) in cyclic 10 ms scan tasks. IC Role / Device Role / Timing Role: Serves as deterministic shared memory between safety-certified scan engine and fieldbus communication coprocessor. Use Value: Guarantees atomic read-modify-write sequences across ports; prevents race conditions during hot-swap I/O module insertion. |
Use Scenario: Buffered telemetry storage during GPS-denied flight phases using backup lithium battery supply. IC Role / Device Role / Timing Role: MASTER dual-port RAM stores mission-critical sensor data while supporting concurrent health-monitoring reads by fault-tolerant watchdog processor. Use Value: 2V data retention preserves 32 KB of flight data for ≥100 hours without main power; MIL-PRF-38535 QML compliance ensures radiation tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Cypress CY7C024AV-70AXC | 70 ns access, 2K × 16, but lacks on-chip arbitration logic and BUSY signaling; requires external glue logic for contention resolution | Not suitable for MASTER/SLAVE width expansion; limited to standalone dual-port use or systems with software-managed arbitration | Select only if arbitration is handled externally and board space permits added logic; not drop-in compatible with 7133SA70JI8 pinout |
| IDT7143SA70JI8 | Identical speed grade and package, but SLAVE-only: BUSY pins are inputs only; no arbitration logic; no BUSY output capability | Used exclusively as expansion device with 7133SA70JI8 MASTER; cannot operate stand-alone in arbitration-required roles | Required companion part for 32-bit+ systems; must be paired with 7133SA70JI8 - not a functional substitute |
Compared with CY7C024AV-70AXC, the 7133SA70JI8 integrates hardware arbitration to eliminate external components and reduce system latency; compared with IDT7143SA70JI8, it provides the essential MASTER functionality - on-chip BUSY generation and priority resolution - required for autonomous contention management.
Availability
7133SA70JI8 is available at Aetrix Electronics and suitable for industrial motor control, avionics data logging, and programmable logic controller (PLC) I/O modules requiring stable component supply across extended product lifecycles.
Supply support for 7133SA70JI8 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) was a fabless semiconductor company specializing in high-performance timing, memory, and interface solutions before its acquisition by Renesas Electronics in 2019.
The IDT7133/7143 family was designed specifically for real-time embedded systems requiring deterministic dual-port memory access, such as industrial automation, military computing, and digital signal processing subsystems.
FAQ
What is the function of the BUSY pins on the 7133SA70JI8?
The BUSYL and BUSYR pins on the 7133SA70JI8 are open-drain outputs that signal port contention when both ports attempt simultaneous access to the same memory location. As a MASTER device, the 7133SA70JI8 asserts these signals to stall the contending port; external pull-up resistors are mandatory per datasheet Note 1. This hardware arbitration eliminates race conditions without software intervention.
Can the 7133SA70JI8 operate with a 3.3V supply?
No. The 7133SA70JI8 is specified strictly for 5.0 V ±10% (4.5 V to 5.5 V) operation per DC Operating Conditions Table 4. It is TTL-compatible and not 3.3V tolerant; applying 3.3V will result in undefined behavior, excessive leakage, or failure to meet timing specifications including the guaranteed 70 ns read cycle.
How does the 7133SA70JI8 differ from the IDT7143SA70JI8?
The 7133SA70JI8 is the MASTER device with on-chip arbitration logic and BUSY outputs, while the IDT7143SA70JI8 is the SLAVE device with BUSY inputs only and no arbitration circuitry. They share identical pinouts and speed grades but are functionally asymmetric: the 7133SA70JI8 must initiate width expansion, and the 7143SA70JI8 extends data width under its control.
Is battery backup supported on the 7133SA70JI8?
Yes - the 7133SA70JI8 (SA suffix) supports 2V data retention per Table 8, maintaining stored memory contents during main power loss. This is validated at TA = +25°C with VCC = 2V; typical data retention current is 100 µA, enabling long-term backup using coin-cell batteries in industrial and avionics applications.
What package type is used for the 7133SA70JI8?
The 7133SA70JI8 uses a 68-pin Plastic Leaded Chip Carrier (PLCC), designated PLG68 in IDT documentation. Its body dimensions are approximately 0.95 in × 0.95 in × 0.17 in, and it requires soldering both VCC and GND pins to ensure reliable operation per datasheet Notes 1 and 2.
7133SA70JI8 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:
- 70ns
- Access Time:
- 70 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)
7133SA70JI8 FAQ
1.How can I place an order for 7133SA70JI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7133SA70JI8 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 7133SA70JI8 reliable?
The price and inventory of 7133SA70JI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7133SA70JI8 is usually 5 days.
3.What payment methods are accepted for 7133SA70JI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7133SA70JI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7133SA70JI8?
7133SA70JI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7133SA70JI8 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 7133SA70JI8?
For technical support, including 7133SA70JI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7133SA70JI8 requirements.
6.How does Aetrix verify that 7133SA70JI8 is sourced from the original manufacturer or authorized distributors?
All 7133SA70JI8 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 7133SA70JI8 meets industry standards.
7.What is the process for return or replacement of 7133SA70JI8?
All 7133SA70JI8 units undergo pre-shipment inspection (PSI). If there is an issue with 7133SA70JI8, 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 7133SA70JI8 part is unused and in its original packaging.
Return procedure for 7133SA70JI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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