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Renesas 7133LA45JI
- Part No.:
- 7133LA45JI
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
7133LA45JI.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 68PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,823
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Product details
Overview
7133LA45JI from IDT is a high-speed 2K × 16 dual-port static RAM with master arbitration logic, 45 ns max read cycle time, 2V data retention capability, and industrial temperature range (–40°C to +85°C). It supports independent asynchronous access on left/right ports and enables 32-bit+ bus expansion when paired with IDT7143 SLAVE devices in real-time control systems.
For engineers reviewing the 7133LA45JI datasheet, 7133LA45JI pinout, 7133LA45JI application, or 7133LA45JI equivalent, this page delivers verified timing specs, BUSY arbitration behavior, low-power standby current (1 µA typ.), byte-level write control per port, and package-specific pin validation for PLCC-68 and PGA-68 footprints.
Technical Context
The 7133LA45JI implements fully asynchronous dual-port operation with separate address, control, and I/O buses for left and right ports. Its on-chip arbitration logic resolves contention via open-drain BUSYL/BUSYR outputs (MASTER-only), requiring external pull-up resistors.
It supports TTL-compatible signaling at 5.0 V ±10%, features separate upper/lower byte write enables (R/WLUB/R/WLLB and R/WRUB/R/WRLB), and enters battery backup mode at VCC = 2 V with 100–4000 µA retention current depending on grade.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 16 bits (32 Kbit), organized as 2048 words × 16-bit wide |
| Read Cycle Time | 45 ns max - defines minimum interval between successive reads on same port |
| Active Current | 230 mA typ. - power draw during concurrent dual-port access at fMAX |
| Standby Current | 1 µA typ. - ultra-low quiescent draw when both CE pins high (CMOS-level inputs) |
| Data Retention Voltage | 2.0 V min - maintains stored data without refresh during brownout or backup battery operation |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments without derating |
| Supply Voltage | 4.5 V to 5.5 V - single-rail TTL-compatible operation with ±10% tolerance |
Pinout & Package
7133LA45JI is available in 68-pin PLCC (PLG68) and 68-pin ceramic PGA (GU68) packages. Both share identical pinout and require dual VCC and dual GND connections for reliable operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A10L / A0R–A11R | Address Inputs (Left/Right) | 11-bit address per port selects one of 2048 memory locations |
| I/O0L–I/O15L / I/O0R–I/O15R | Bidirectional Data Bus | 16-bit parallel data path per port; high-impedance when OE inactive |
| CEL / CER | Chip Enable (Left/Right) | Active-low enable for port-specific power-down and memory access |
| R/WLUB / R/WRUB | Upper Byte Write Enable | Controls write to I/O8–I/O15 on respective port independently |
| R/WLLB / R/WRLB | Lower Byte Write Enable | Controls write to I/O0–I/O7 on respective port independently |
| OEL / OER | Output Enable (Left/Right) | Active-low gate for data output drivers; does not affect write path |
| BUSYL / BUSYR | Busy Flag (MASTER only) | Open-drain outputs indicating port contention; require pull-up resistors |
| VCC(1), VCC(2) | Power Supply | Two dedicated 5 V supply pins - both must be connected to ensure signal integrity |
| GND(1), GND(2) | Ground | Two dedicated ground pins - both must be connected to minimize noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| On-chip arbitration logic | Resolves simultaneous access to same address without external logic; prevents data corruption |
| Byte-selectable write control | Independent upper/lower byte enables per port allow partial-word writes without masking |
| 2V data retention mode | Preserves memory contents during main power loss using backup battery or capacitor hold-up |
| Ultra-low standby current | 1 µA typical draw in full CMOS standby enables long-term battery-backed operation |
| MASTER/SLAVE expandability | Enables seamless 32-bit+ word width systems using one 7133LA45JI MASTER + multiple 7143LA SLAVEs |
Applications
| Real-Time Industrial PLC | Digital Signal Processing Buffer |
|---|---|
Use Scenario: Dual-CPU communication in programmable logic controllers where one CPU handles I/O scanning and the other executes ladder logic. IC Role / Device Role / Timing Role: Shared memory buffer with hardware arbitration preventing race conditions during register updates. Use Value: Eliminates software semaphores and guarantees deterministic <45 ns inter-processor data exchange latency. |
Use Scenario: Ping-pong buffering between ADC acquisition engine and DSP core in motor control inverters. IC Role / Device Role / Timing Role: Asynchronous dual-port RAM enabling continuous sampling on one port while FFT processing runs on the other. Use Value: Sustains 20 MSPS sample throughput with zero-cycle dead time between buffer swaps. |
| Avionics Flight Control System | Medical Imaging Data Pipeline |
Use Scenario: Redundant flight computer synchronization in DO-254-certified airborne systems requiring lock-step memory access. IC Role / Device Role / Timing Role: MASTER-configured 7133LA45JI coordinating write arbitration across dual-channel sensor fusion processors. Use Value: Provides MIL-PRF-38535 QML-compliant hardware-enforced mutual exclusion for safety-critical writes. |
Use Scenario: Real-time DICOM image reconstruction pipeline where FPGA-acquired raw data feeds into ARM-based post-processing unit. IC Role / Device Role / Timing Role: High-bandwidth 16-bit interface bridging FPGA pixel stream and CPU memory subsystem. Use Value: Delivers sustained 180 MB/s throughput (45 ns × 16-bit) with no DMA overhead or cache coherency complexity. |
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 CY7C1362AV25 | 3.3 V core, 25 ns access, no built-in arbitration logic; requires external BUSY management | Lacks MASTER/SLAVE expansion support; suited for simpler dual-CPU designs without contention resolution needs | Select when migrating to lower-voltage systems and external arbitration is acceptable |
| IDT7143LA45JI | SLAVE-only variant: BUSY pins are inputs only; no on-chip arbitration logic; identical timing and power specs | Used exclusively as expansion device with 7133LA45JI MASTER; cannot operate standalone as arbitrator | Choose only when building 32-bit+ bus width systems requiring hardware-controlled write inhibition |
Compared with CY7C1362AV25 and IDT7143LA45JI, the 7133LA45JI uniquely integrates arbitration logic and open-drain BUSY outputs-enabling deterministic contention resolution and scalable multi-chip width expansion without glue logic or firmware intervention.
Availability
7133LA45JI is available at Aetrix Electronics and suitable for real-time industrial PLCs, avionics flight control systems, and medical imaging data pipelines requiring stable component supply across extended product lifecycles.
Supply support for 7133LA45JI 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 7133LA45JI belongs to IDT's legacy dual-port SRAM product line, engineered for deterministic real-time systems requiring hardware-arbitrated shared memory between independent processors or data paths.
FAQ
What is the function of BUSYL and BUSYR on the 7133LA45JI?
BUSYL and BUSYR are open-drain busy flag outputs unique to the MASTER 7133LA45JI. They assert low when port contention occurs on the corresponding port, signaling the external system to stall further access until the conflict resolves. External pull-up resistors are mandatory for proper operation, and these signals drive arbitration in MASTER/SLAVE configurations.
Does the 7133LA45JI support true 2V data retention?
Yes, the 7133LA45JI supports guaranteed data retention at VCC = 2.0 V (min), with typical retention current of 100 µA and maximum of 4000 µA over the industrial temperature range. This enables reliable operation during brownout conditions or when backed by a coin-cell battery, as confirmed in Table 8 of the official datasheet.
Can the 7133LA45JI operate without external pull-up resistors on BUSY pins?
No - the 7133LA45JI BUSYL and BUSYR pins are open-drain outputs and require external pull-up resistors to establish valid HIGH logic levels. Omitting them results in undefined BUSY signaling, leading to potential arbitration failure and data corruption in contention scenarios.
How does the 7133LA45JI differ from the 7143LA45JI in system design?
The 7133LA45JI contains on-chip arbitration logic and drives BUSY as an output, functioning as the MASTER in width-expanded systems. The 7143LA45JI has no arbitration logic and accepts BUSY as an input only, serving exclusively as a SLAVE. They share identical timing, power, and pinout but are not interchangeable in MASTER role.
What package options are validated for the 7133LA45JI?
The 7133LA45JI is validated in 68-pin PLCC (PLG68) and 68-pin ceramic PGA (GU68) packages, both requiring dual VCC and dual GND connections. Pin configurations are identical across packages, enabling footprint compatibility in layout design while supporting different thermal and mechanical requirements.
7133LA45JI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 68-LCC (J-Lead)
- Packaging:
- Tube
- 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:
- 45ns
- Access Time:
- 45 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)
7133LA45JI FAQ
1.How can I place an order for 7133LA45JI through Aetrix?
Please submit a Request for Quotation (RFQ) for 7133LA45JI 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 7133LA45JI reliable?
The price and inventory of 7133LA45JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7133LA45JI is usually 5 days.
3.What payment methods are accepted for 7133LA45JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7133LA45JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7133LA45JI?
7133LA45JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7133LA45JI 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 7133LA45JI?
For technical support, including 7133LA45JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7133LA45JI requirements.
6.How does Aetrix verify that 7133LA45JI is sourced from the original manufacturer or authorized distributors?
All 7133LA45JI 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 7133LA45JI meets industry standards.
7.What is the process for return or replacement of 7133LA45JI?
All 7133LA45JI units undergo pre-shipment inspection (PSI). If there is an issue with 7133LA45JI, 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 7133LA45JI part is unused and in its original packaging.
Return procedure for 7133LA45JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7133LA45JI Tags
-
M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
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