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Renesas 7133SA20J8
- Part No.:
- 7133SA20J8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
7133SA20J8.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 68PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,533
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Product details
Overview
7133SA20J8 from IDT (Integrated Device Technology) is a high-speed 2K × 16-bit dual-port static RAM configured as a MASTER device with on-chip arbitration logic, 20 ns maximum read cycle time, TTL-compatible 5V ±10% operation, and open-drain BUSY output requiring external pull-up. It enables error-free 32-bit+ memory expansion when paired with IDT7143 SLAVE devices in real-time embedded control systems.
For engineers reviewing the 7133SA20J8 datasheet, 7133SA20J8 pinout, 7133SA20J8 application, or 7133SA20J8 equivalent, this page delivers verified timing parameters, byte-select write control, BUSY arbitration behavior, industrial temperature support (–40°C to +85°C), and package-specific pin mapping for reliable system integration.
Technical Context
The 7133SA20J8 implements fully asynchronous dual-port access with independent left/right address, control, and I/O buses - enabling concurrent reads/writes to any memory location without internal synchronization overhead. Its on-chip arbitration logic resolves port contention by asserting BUSYL/BUSYR flags and gating writes on the losing port.
As a MASTER device, it features open-drain BUSY outputs (BUSYL, BUSYR) with defined access/disable timing (tBAA ≤ 20 ns, tBDC ≤ 17 ns), supports separate upper/lower byte write enables (R/WLUB/R/WLLB, R/WRUB/R/WRLB), and provides battery backup data retention down to 2V in LA variants - though 7133SA20J8 is the SA (standard power) version.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 2K × 16 bits (32,768 bits total); supports independent 16-bit word access per port |
| Max Read Cycle Time (tRC) | 20 ns - defines minimum interval between successive read operations on same port |
| Access Time (tAA) | 20 ns max - delay from valid address to stable data output; critical for CPU interface timing |
| Supply Voltage | 5.0 V ±10% - single-rail TTL-compatible operation; both VCC pins must be connected |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments; not military-grade (70/90ns variants are) |
| Active Current (ICC) | 250 mA typ. - dynamic current at fMAX; informs power rail sizing and thermal design |
| Standby Current (ISB1) | 25 mA typ. - both ports disabled (CEL/CER = VIH); key for low-power sleep modes |
Pinout & Package
7133SA20J8 is packaged in a 68-pin PLCC (PLG68), with 2×34-pin staggered layout. Pin 1 is marked by notch; both VCC and GND pins are duplicated for noise immunity and current distribution - all four must be connected per manufacturer note.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Active-low enable per port; controls port power-down (ISB1/ISB2 states) and arbitration participation |
| R/WLUB / R/WRUB | Upper Byte Write Enable (L/R) | Independent write strobe for I/O8–I/O15; enables byte-granular writes without affecting lower byte |
| R/WLLB / R/WRLB | Lower Byte Write Enable (L/R) | Independent write strobe for I/O0–I/O7; allows mixed-byte updates in shared-memory protocols |
| OEL / OER | Output Enable (L/R) | Tri-states I/O bus when deasserted; used with CE to manage bus contention during arbitration |
| BUSYL / BUSYR | BUSY Flag (L/R Output) | Open-drain MASTER outputs; indicate port contention; require external pull-up resistors |
| A0L–A10L / A0R–A10R | Address Inputs (L/R) | 11-bit address per port (2¹¹ = 2K locations); no internal address latching - fully asynchronous |
| I/O0L–I/O15L / I/O0R–I/O15R | Data I/O (L/R) | Bidirectional 16-bit data bus per port; high-impedance when OE/CE inactive; supports TTL-level signaling |
Key Features
| Feature | Design Value |
|---|---|
| On-chip port arbitration logic | Resolves simultaneous access to identical addresses without external logic; prevents data corruption via BUSY-driven write inhibition |
| Separate upper/lower byte write control | Enables atomic 8-bit updates in 16-bit systems - essential for protocol stacks and register-mapped peripherals |
| MASTER/SLAVE expandability | One 7133SA20J8 MASTER coordinates arbitration for multiple 7143 SLAVE devices, enabling seamless 32-bit+ data bus width scaling |
| Full asynchronous dual-port operation | Eliminates clock domain crossing; supports heterogeneous processors (e.g., DSP + microcontroller) sharing memory without synchronization overhead |
| TTL-compatible 5V interface | Direct connection to legacy 5V logic families (74LS, 74F); no level-shifting required in industrial control backplanes |
Applications
| Industrial PLC Memory Buffer | DSP + Microcontroller Shared Memory |
|---|---|
|
Use Scenario: Real-time I/O scanning and logic execution in programmable logic controllers where deterministic memory access latency is mandatory. IC Role / Device Role / Timing Role: MASTER dual-port RAM acting as zero-wait-state buffer between scan engine (left port) and ladder logic processor (right port). Use Value: 20 ns tRC and on-chip arbitration eliminate software polling or semaphores - guaranteeing sub-50 ns worst-case inter-processor handshaking. |
Use Scenario: High-throughput data exchange between a TI C6000 DSP (handling signal processing) and an ARM Cortex-M7 (managing peripherals and comms). IC Role / Device Role / Timing Role: Asynchronous shared memory hub with independent byte-write enables allowing DSP to update status flags while M7 handles packet headers. Use Value: Separate R/WLUB/R/WLLB control prevents bus lock during mixed-byte DMA transfers - sustaining >90% memory bandwidth utilization. |
| Avionics Sensor Fusion Node | Test Equipment Pattern Memory |
|
Use Scenario: Multi-sensor data aggregation (IMU, GPS, barometer) in DO-254-compliant airborne systems requiring fault-tolerant memory access. IC Role / Device Role / Timing Role: MASTER device coordinating two sensor acquisition channels; BUSY signals routed to FPGA for hardware-level contention logging. Use Value: Open-drain BUSY outputs allow wired-OR interrupt generation - enabling immediate fault detection without CPU intervention. |
Use Scenario: High-speed digital pattern generator storing stimulus/response vectors for ATE systems verifying ASIC functionality at 50 MHz. IC Role / Device Role / Timing Role: Dual-port RAM interfaced to pattern sequencer (left port) and comparator (right port), running back-to-back read/write cycles. Use Value: 20 ns tRC and tAOE ≤ 12 ns ensure full-speed vector streaming with no pipeline stalls - critical for <100 ns test cycle times. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port RAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Cypress CY7C1362AV25 | 2K × 16, 25 ns tRC, 3.3V core (5V tolerant I/O), no built-in arbitration logic - requires external BUSY management | Lacks on-chip arbitration; suitable only where FPGA or processor handles contention resolution | Select when migrating to 3.3V systems and external logic already exists for BUSY coordination |
| IDT7143SA20J8 | Same speed grade and pinout, but SLAVE-only: BUSY pins are inputs (not outputs); no arbitration logic; requires companion 7133 MASTER | Cannot operate standalone as MASTER; must be used in pair with 7133SA20J8 for width expansion | Choose only as secondary device in multi-chip 32-bit+ configurations - never as direct replacement for 7133SA20J8 |
Compared with CY7C1362AV25 and IDT7143SA20J8, the 7133SA20J8 uniquely integrates arbitration logic and open-drain BUSY outputs - eliminating external glue logic and enabling true plug-and-play dual-CPU memory sharing in industrial and avionics designs.
Availability
7133SA20J8 is available at Aetrix Electronics and suitable for industrial PLCs, avionics sensor nodes, test equipment pattern memory, and DSP/microcontroller co-processing systems requiring stable component supply across extended product lifecycles.
Supply support for 7133SA20J8 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 timing, memory interface, RF, and sensor solutions before its acquisition by Renesas Electronics in 2019. Its dual-port RAM portfolio remains widely deployed in mission-critical systems.
The 7133SA20J8 belongs to IDT's high-speed dual-port SRAM family designed specifically for real-time embedded systems requiring deterministic, contention-free memory access between heterogeneous processors or subsystems.
FAQ
What is the operating temperature range for the 7133SA20J8?
The 7133SA20J8 is rated for industrial temperature operation from –40°C to +85°C. This is confirmed in the "Maximum Operating Temperature and Supply Voltage" table, where the Industrial grade specifies that exact range under VCC = 5.0V ±10%. It is not qualified for military (–55°C to +125°C) or commercial (0°C to +70°C) grades.
Does the 7133SA20J8 include on-chip arbitration logic?
Yes, the 7133SA20J8 includes on-chip arbitration logic - a defining feature of the IDT7133 MASTER series. This logic detects simultaneous accesses to the same memory address across ports and asserts BUSYL/BUSYR to inhibit the losing write, preventing data corruption without external components.
What package type is used for the 7133SA20J8?
The 7133SA20J8 uses a 68-pin PLCC (Plastic Leaded Chip Carrier), designated PLG68 in IDT documentation. The pin configuration matches the top-view diagram labeled "7133/43 PLG68(4)" - with dual VCC and GND pins requiring connection per manufacturer note.
How does the BUSY function differ between 7133SA20J8 and 7143SA20J8?
In the 7133SA20J8, BUSYL and BUSYR are open-drain outputs used to signal port contention and drive external arbitration. In contrast, the 7143SA20J8 has BUSYL and BUSYR as inputs only - it relies on a companion 7133 to provide the BUSY signal, making it a SLAVE-only device with no internal arbitration.
Can the 7133SA20J8 operate with a 3.3V supply?
No, the 7133SA20J8 requires a 5.0V ±10% supply (4.5V to 5.5V) as specified in the "Recommended DC Operating Conditions" table. Its input thresholds (VIH min = 2.2V, VIL max = 0.8V) and output drive characteristics are designed for TTL compatibility, not 3.3V logic levels.
7133SA20J8 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:
- 20ns
- Access Time:
- 20 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)
7133SA20J8 FAQ
1.How can I place an order for 7133SA20J8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7133SA20J8 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 7133SA20J8 reliable?
The price and inventory of 7133SA20J8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7133SA20J8 is usually 5 days.
3.What payment methods are accepted for 7133SA20J8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7133SA20J8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7133SA20J8?
7133SA20J8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7133SA20J8 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 7133SA20J8?
For technical support, including 7133SA20J8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7133SA20J8 requirements.
6.How does Aetrix verify that 7133SA20J8 is sourced from the original manufacturer or authorized distributors?
All 7133SA20J8 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 7133SA20J8 meets industry standards.
7.What is the process for return or replacement of 7133SA20J8?
All 7133SA20J8 units undergo pre-shipment inspection (PSI). If there is an issue with 7133SA20J8, 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 7133SA20J8 part is unused and in its original packaging.
Return procedure for 7133SA20J8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7133SA20J8 Tags
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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24AA02UIDT-I/OT
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