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Renesas 7133LA35G
- Part No.:
- 7133LA35G
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-BPGA
- Datasheet:
-
7133LA35G.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 68PGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,331
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Product details
Overview
7133LA35G from IDT is a high-speed 2K × 16 dual-port static RAM with master arbitration logic, 35 ns max read cycle time, 2V data retention capability, and industrial temperature range (–40°C to +85°C). It enables simultaneous asynchronous access from left and right ports in real-time systems such as digital signal processors and military avionics.
For engineers reviewing the 7133LA35G datasheet, 7133LA35G pinout, 7133LA35G application, or 7133LA35G equivalent, this page delivers verified timing parameters, BUSY arbitration behavior, byte-select write control, low-power standby current (1 µA typ.), and package-specific pin mapping for 68-pin PLCC.
Technical Context
The 7133LA35G implements fully asynchronous dual-port operation with independent address, control, and I/O buses per port. Its on-chip arbitration logic resolves contention when both ports access the same memory location, asserting open-drain BUSYL/BUSYR flags requiring external pull-up resistors.
It supports separate upper- and lower-byte write enables (R/WLUB/R/WLLB and R/WRUB/R/WRLB), TTL-compatible 5V ±10% supply, and battery backup mode with 2V VCC sustaining data retention - a key requirement for fail-safe embedded controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 16 bits (32 Kbit total); supports independent 16-bit word access per port |
| Max Read Cycle Time | 35 ns - defines minimum clock period for synchronous bus interfacing at full speed |
| Standby Current (ISB3) | 0.2 mA typ. - enables ultra-low-power hold mode during CPU sleep in portable systems |
| Data Retention Voltage | 2.0 V min. - allows direct connection to backup lithium cell without regulator |
| Operating Temperature | –40°C to +85°C - qualified for industrial automation and transportation electronics |
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5V TTL logic families and legacy backplanes |
| Bus Interface | Fully asynchronous dual-port - eliminates clock domain crossing and simplifies FPGA glue logic |
Pinout & Package
7133LA35G is packaged in a 68-pin PLCC (PLG68) with 0.95″ × 0.95″ footprint. Both VCC and GND pins must be connected to ensure reliable operation per datasheet note.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A10L / A0R–A10R | Address Inputs (Left/Right) | 11-bit address per port selects one of 2K locations; independent addressing enables concurrent access |
| I/O0L–I/O15L / I/O0R–I/O15R | Bidirectional Data Bus (Left/Right) | 16-bit parallel data path per port; high-impedance state controlled by OE and CE |
| CEL / CER | Chip Enable (Left/Right) | Active-low enable for respective port; controls power-down entry and output driver activation |
| R/WLUB / R/WRUB | Upper-Byte Write Enable (Left/Right) | Asserts write to I/O8–I/O15 only; enables byte-level granularity without masking logic |
| R/WLLB / R/WRLB | Lower-Byte Write Enable (Left/Right) | Asserts write to I/O0–I/O7 only; critical for mixed-endian or partial-word updates |
| OEL / OER | Output Enable (Left/Right) | Controls tri-state of I/O drivers; used with CE to manage bus sharing in multi-device systems |
| BUSYL / BUSYR | Busy Flag (Open-Drain Output) | Indicates port contention; requires external pull-up; used to stall CPU or trigger interrupt on conflict |
Key Features
| Feature | Design Value |
|---|---|
| On-chip arbitration logic | Resolves simultaneous access to identical addresses without external logic; prevents data corruption in real-time dual-CPU systems |
| Separate byte write enables | Enables atomic 8-bit updates to 16-bit words - essential for register-mapped peripherals and protocol stacks |
| 2V data retention mode | Maintains SRAM contents during main power loss using coin-cell backup; eliminates need for external nonvolatile storage |
| Low-power LA variant | 1 µA typical standby current (ISB3) - extends battery life in always-on monitoring devices beyond 10 years |
| TTL-compatible I/O | Direct interface with legacy 5V microcontrollers, FPGAs, and ASICs without level-shifting circuitry |
Applications
| Digital Signal Processor Memory | Military Avionics Data Buffer |
|---|---|
Use Scenario: Dual-CPU DSP system where one core processes sensor data while the other runs control algorithms. IC Role / Device Role / Timing Role: Shared memory buffer enabling zero-latency inter-core communication via simultaneous port access. Use Value: Eliminates software semaphores and polling; 35 ns access ensures deterministic response under worst-case load. |
Use Scenario: Flight control computer requiring fault-tolerant data exchange between redundant processing channels. IC Role / Device Role / Timing Role: Arbitrated dual-port RAM acting as synchronized data conduit with hardware-enforced write collision avoidance. Use Value: BUSY flag provides immediate hardware-level conflict detection, meeting DO-254 safety-critical timing requirements. |
| Industrial PLC I/O Mapping | Telecom Line Card Buffer |
Use Scenario: Programmable logic controller with separate scan engine and HMI update task running concurrently. IC Role / Device Role / Timing Role: Memory-mapped I/O register bank accessible by both tasks without bus contention. Use Value: Byte-select write enables allow atomic updates to individual status bits without corrupting adjacent registers. |
Use Scenario: High-density telecom line card buffering packet headers between ingress and egress ASICs. IC Role / Device Role / Timing Role: Dual-port SRAM serving as ping-pong buffer with one port feeding data to serializer, the other receiving from deserializer. Use Value: Asynchronous operation eliminates clock domain synchronization overhead; 2V retention preserves header context during hot-swap events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C133-35JC | 35 ns access, 2K × 16, but lacks on-chip arbitration logic and BUSY signaling | Requires external logic for contention resolution; unsuitable for master/slave expansion | Select only if arbitration is handled in FPGA or if single-chip usage avoids conflict scenarios |
| IDT7143LA35G | Identical timing and pinout, but functions as SLAVE only - BUSY is input-only, no arbitration logic | Used exclusively with IDT7133LA35G in 32-bit+ width-expansion configurations | Choose when building scalable memory arrays; cannot replace 7133LA35G in standalone or master-role designs |
Compared with CY7C133-35JC, 7133LA35G provides integrated hardware arbitration eliminating external logic; compared with IDT7143LA35G, it serves as the sole master with BUSY output capability - making it irreplaceable in systems requiring autonomous conflict resolution.
Availability
7133LA35G is available at Aetrix Electronics and suitable for digital signal processing, industrial PLCs, military avionics, and telecom infrastructure requiring stable component supply across extended product lifecycles.
Supply support for 7133LA35G 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 high-performance memory, timing, and interface solutions for communications and computing markets.
The IDT7133 family was designed specifically for real-time dual-processor systems requiring deterministic, contention-free shared memory - targeting aerospace, defense, and industrial control applications.
FAQ
What is the function of the BUSY pin on the 7133LA35G?
The BUSY pin on the 7133LA35G is an open-drain output that signals port contention when both left and right ports attempt to access the same memory location simultaneously. It requires an external pull-up resistor and is used to stall the contending port's access until the ongoing operation completes. This hardware arbitration prevents data corruption without software intervention - a critical feature for real-time deterministic systems using the 7133LA35G.
Does the 7133LA35G support battery backup operation?
Yes, the 7133LA35G supports battery backup operation with guaranteed data retention at VCC = 2.0 V minimum. In this mode, standby current drops to 100 µA typical (ICCDR), allowing direct connection to a lithium coin cell for long-term memory preservation during main power loss. This capability is intrinsic to the LA (low-power) variant and is explicitly characterized in the 7133LA35G datasheet.
Can the 7133LA35G be used as a standalone dual-port RAM without arbitration?
Yes, the 7133LA35G can operate as a standalone dual-port RAM without using the BUSY arbitration feature. When BUSY is not needed, the BUSYL and BUSYR pins may be tied high (via pull-ups) to disable arbitration, allowing unrestricted concurrent reads/writes. However, in cases of simultaneous writes to the same address, data integrity is not guaranteed - so the 7133LA35G's arbitration remains recommended for mission-critical applications.
What package types are available for the 7133LA35G?
The 7133LA35G is available in multiple packages including 68-pin PLCC (PLG68), 68-pin ceramic PGA (GU68), 68-pin flatpack (FP68), and 100-pin TQFP (PNG100). The part number suffix "G" specifically denotes the 68-pin PLCC variant. All packages share identical pinouts and electrical specifications, enabling drop-in replacement across form factors where board space and thermal constraints permit.
How does the 7133LA35G differ from the IDT7143LA35G?
The 7133LA35G contains on-chip arbitration logic and outputs BUSY signals, functioning as the MASTER in width-expanded systems. In contrast, the IDT7143LA35G has no arbitration logic and accepts BUSY as an input only - serving exclusively as a SLAVE. They share identical timing (35 ns), pinout, and power specs, but the 7133LA35G is required to initiate and resolve contention; the 7143LA35G cannot substitute for it in master-role applications.
7133LA35G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 68-BPGA
- Packaging:
- Tray
- 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:
- 35ns
- Access Time:
- 35 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 68-PGA (29.46x29.46)
7133LA35G FAQ
1.How can I place an order for 7133LA35G through Aetrix?
Please submit a Request for Quotation (RFQ) for 7133LA35G 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 7133LA35G reliable?
The price and inventory of 7133LA35G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7133LA35G is usually 5 days.
3.What payment methods are accepted for 7133LA35G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7133LA35G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7133LA35G?
7133LA35G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7133LA35G 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 7133LA35G?
For technical support, including 7133LA35G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7133LA35G requirements.
6.How does Aetrix verify that 7133LA35G is sourced from the original manufacturer or authorized distributors?
All 7133LA35G 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 7133LA35G meets industry standards.
7.What is the process for return or replacement of 7133LA35G?
All 7133LA35G units undergo pre-shipment inspection (PSI). If there is an issue with 7133LA35G, 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 7133LA35G part is unused and in its original packaging.
Return procedure for 7133LA35G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7133LA35G Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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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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AT24C08C-STUM-T
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