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Renesas 7133LA70JI8
- Part No.:
- 7133LA70JI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
7133LA70JI8.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 68PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,735
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Product details
Overview
7133LA70JI8 from IDT is a high-speed 2K × 16 dual-port static RAM with master arbitration logic, 70 ns max read cycle time, 2V data retention capability, and industrial temperature range (–40°C to +85°C). It enables concurrent asynchronous access from two independent ports in real-time embedded systems requiring deterministic memory arbitration - such as radar signal processors and avionics display controllers.
For engineers reviewing the 7133LA70JI8 datasheet, 7133LA70JI8 pinout, 7133LA70JI8 application, or 7133LA70JI8 equivalent, key selection criteria include BUSY arbitration timing (tBDD ≤ 40 ns), low standby current (ISB3 = 0.2 mA typ.), byte-selectable write control per port, and compatibility with 5V ±10% TTL-level interfaces in width-expanded MASTER/SLAVE configurations.
Technical Context
The 7133LA70JI8 implements on-chip port arbitration logic that resolves simultaneous accesses to identical addresses by asserting BUSYL/BUSYR open-drain outputs (requiring external pull-up) to stall the lower-priority port. Its dual independent control paths support separate upper/lower byte write enables (R/WLUB/R/WLLB and R/WRUB/R/WRLB) and output enables (OEL/OER) per port.
It operates fully asynchronously: address, CE, OE, and R/W transitions are independent per port, with no clock required. The LA variant delivers ultra-low standby power (1 mW typ.) and battery backup operation at VCC = 2V, enabling nonvolatile data retention during main power loss in mission-critical systems.
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 without external data bus multiplexing. |
| Access Time | 70 ns max read cycle time (tRC); guarantees deterministic latency for real-time interrupt handlers and DMA engines. |
| Supply Voltage | 5.0 V ±10% (4.5–5.5 V); compatible with legacy 5V TTL logic families without level-shifting. |
| Standby Current | 0.2 mA typical (ISB3, CMOS-level inputs); enables >10-year battery-backed retention with standard coin cells. |
| Data Retention | 2 V minimum VCC (VDR); maintains stored data during brown-out or controlled power-down sequences. |
| Operating Temp | –40°C to +85°C (industrial grade); qualified for under-hood automotive ECUs and outdoor telecom base stations. |
| Arbitration Logic | On-chip BUSY flag generation (IDT7133-only); eliminates need for external arbitration ICs in dual-CPU shared-memory designs. |
Pinout & Package
7133LA70JI8 is packaged in a 68-pin PLCC (PLG68) with 0.95″ × 0.95″ footprint and 0.17″ height. Both VCC and GND pins must be connected to ensure reliable operation per datasheet Note 1 and 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A10L / A0R–A10R | Address Inputs (Left/Right Port) | 11-bit address bus per port; selects one of 2K locations independently; no shared address lines between ports. |
| I/O0L–I/O15L / I/O0R–I/O15R | Bidirectional Data Bus (Left/Right Port) | 16-bit parallel I/O per port; high-impedance when CE or OE inactive; supports byte-wide writes via R/WxxB controls. |
| CEL / CER | Chip Enable (Left/Right Port) | Active-low enable; drives port into low-power standby (ISB3 = 0.2 mA) when HIGH; required for arbitration gating. |
| R/WLUB / R/WRUB R/WLLB / R/WRLB |
Upper/Lower Byte Write Enable | Independent 8-bit write control per port; enables partial-word updates without read-modify-write cycles. |
| OEL / OER | Output Enable (Left/Right Port) | Active-low; places I/O pins in high-Z state when deasserted; allows bus sharing with other devices. |
| BUSYL / BUSYR | Busy Flag (Open-Drain Output) | IDT7133-specific arbitration signal; requires external pull-up; asserts when address contention occurs on same location. |
| VCC (×2) / GND (×2) | Power & Ground | Dual VCC/GND pairs reduce switching noise and improve signal integrity in high-speed dual-port operation. |
Key Features
| Feature | Design Value |
|---|---|
| Master Arbitration Logic | Hardware-resolved port contention via BUSY signaling eliminates software arbitration overhead and race conditions in dual-CPU systems. |
| Byte-Selectable Write Control | Separate upper/lower byte write enables per port allow atomic 8-bit updates - critical for status register shadowing and protocol buffer management. |
| 2V Data Retention | Retains memory contents at VCC ≥ 2V; enables seamless transition to battery backup without data loss during primary power failure. |
| Ultra-Low Standby Power | 1 mW typical standby power (ISB3); extends battery life in portable test equipment and remote sensor nodes. |
| Width Expansion Support | MASTER/SLAVE architecture (with IDT7143LA) enables 32-bit+ data buses without external logic or timing penalties. |
Applications
| Radar Signal Processing | Avionics Display Controller |
|---|---|
|
Use Scenario: Dual-CPU architecture where DSP handles real-time FFT processing while microcontroller manages GUI rendering and input handling. IC Role / Device Role / Timing Role: Shared memory buffer with deterministic arbitration ensures zero-latency access to frame buffers and metadata tables. Use Value: 70 ns tRC and hardware BUSY resolution prevent pipeline stalls during simultaneous read/write to radar return buffers. |
Use Scenario: Integrated cockpit display unit requiring synchronized video overlay and flight parameter logging. IC Role / Device Role / Timing Role: Dual-port RAM serves as pixel FIFO and telemetry scratchpad, accessed concurrently by GPU and ARM core. Use Value: Independent OEL/OER and R/WxxB controls enable concurrent pixel streaming and timestamped logging without bus contention. |
| Industrial PLC Communication Module | Medical Imaging Front-End |
|
Use Scenario: EtherCAT slave node with real-time I/O mapping and diagnostics storage. IC Role / Device Role / Timing Role: Memory-mapped interface between FPGA-based protocol engine and ARM application processor. Use Value: 2V data retention preserves configuration and error logs during brief AC mains interruptions. |
Use Scenario: Ultrasound beamformer ASIC interfacing with host controller for raw RF data buffering. IC Role / Device Role / Timing Role: High-bandwidth dual-port buffer decouples ADC sampling (left port) from host DMA transfers (right port). Use Value: 70 ns tRC and full asynchrony guarantee uninterrupted 100+ MSPS data capture without dropped samples. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT7143LA70JI8 | SLAVE-only variant; BUSY pins are inputs only; no on-chip arbitration logic. | Used only in width-expanded systems paired with IDT7133LA; cannot operate standalone as master. | Select when building 32-bit+ memory arrays with IDT7133LA as master; not a drop-in replacement. |
| CY7C1371BV33-100AXC | 3.3V core, 100 MHz QDR interface; no BUSY arbitration; different pinout and voltage domain. | Targets high-throughput networking buffers; lacks battery backup and industrial temp rating. | Choose for 3.3V systems needing higher bandwidth; requires level shifters and redesign for 5V environments. |
Compared with IDT7143LA70JI8 and CY7C1371BV33-100AXC, the 7133LA70JI8 uniquely combines 5V TTL compatibility, on-chip arbitration, 2V data retention, and industrial temperature operation - making it irreplaceable in legacy avionics and ruggedized control systems where deterministic contention resolution and power-fail resilience are mandatory.
Availability
7133LA70JI8 is available at Aetrix Electronics and suitable for radar signal processing, avionics display controllers, and industrial PLC communication modules requiring stable component supply across extended product lifecycles.
Supply support for 7133LA70JI8 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.
The IDT7133/7143 family was designed for real-time embedded systems demanding concurrent memory access, hardware arbitration, and battery-backed data retention - particularly in defense, aerospace, and industrial automation.
FAQ
What is the maximum operating temperature range for the 7133LA70JI8?
The 7133LA70JI8 is rated for industrial temperature operation from –40°C to +85°C. This specification is confirmed in Table 4 of the datasheet under "Maximum Operating Temperature and Supply Voltage", and applies to all LA-speed variants including the 70 ns version. It is not rated for military-grade –55°C to +125°C operation.
Does the 7133LA70JI8 support true dual-port concurrent read/write operations?
Yes, the 7133LA70JI8 supports fully asynchronous concurrent access: either port may perform reads or writes independently at any time. However, when both ports access the same memory address simultaneously, on-chip arbitration asserts BUSYL or BUSYR to stall the lower-priority port - ensuring data coherency without external logic.
What is the purpose of the two VCC and two GND pins on the 7133LA70JI8?
The dual VCC and GND pins on the 7133LA70JI8 are required for stable high-speed operation. Per datasheet Notes 1 and 2, both VCC pins must be connected to the 5V supply and both GND pins to ground to ensure reliable signal integrity and minimize switching noise across the 68-pin PLCC package.
Can the 7133LA70JI8 operate with a 2V supply for data retention only?
Yes - the 7133LA70JI8 guarantees data retention at VCC ≥ 2.0 V (VDR parameter, Table 8). In this mode, dynamic operation ceases, but stored data remains valid. This is a key feature of the LA (low-power) variant and is explicitly characterized for the 7133LA70JI8 in the datasheet's Data Retention Characteristics section.
Is the 7133LA70JI8 pin-compatible with the IDT7143LA70JI8?
Yes, the 7133LA70JI8 and IDT7143LA70JI8 share identical pinouts per the datasheet statement: "The IDT7133/7143 devices have identical pinouts." However, their BUSY pin functionality differs: 7133LA70JI8 has BUSY as an open-drain output (requires pull-up), while 7143LA70JI8 uses BUSY as an input only.
7133LA70JI8 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)
7133LA70JI8 FAQ
1.How can I place an order for 7133LA70JI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7133LA70JI8 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 7133LA70JI8 reliable?
The price and inventory of 7133LA70JI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7133LA70JI8 is usually 5 days.
3.What payment methods are accepted for 7133LA70JI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7133LA70JI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7133LA70JI8?
7133LA70JI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7133LA70JI8 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 7133LA70JI8?
For technical support, including 7133LA70JI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7133LA70JI8 requirements.
6.How does Aetrix verify that 7133LA70JI8 is sourced from the original manufacturer or authorized distributors?
All 7133LA70JI8 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 7133LA70JI8 meets industry standards.
7.What is the process for return or replacement of 7133LA70JI8?
All 7133LA70JI8 units undergo pre-shipment inspection (PSI). If there is an issue with 7133LA70JI8, 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 7133LA70JI8 part is unused and in its original packaging.
Return procedure for 7133LA70JI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7133LA70JI8 Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
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24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
STMicroelectronics
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AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
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24LC01BT-I/SN
Microchip Technology
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24AA02UIDT-I/OT
Microchip Technology
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AT24C08C-STUM-T
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