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Renesas 7133LA35PFI8
- Part No.:
- 7133LA35PFI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
7133LA35PFI8.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,342
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Product details
Overview
7133LA35PFI8 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, 35 ns maximum read cycle time, 2V data retention capability, and industrial temperature range (–40°C to +85°C). It enables error-free 32-bit-or-wider memory expansion when paired with IDT7143 SLAVE devices in real-time embedded control systems requiring concurrent CPU/DSP access.
For engineers reviewing the 7133LA35PFI8 datasheet, 7133LA35PFI8 pinout, 7133LA35PFI8 application, or 7133LA35PFI8 equivalent, this page delivers verified timing parameters, byte-select write control per port, BUSY arbitration behavior, low-power standby current (1 µA typ.), and package-specific pin validation for the 68-pin PLCC variant.
Technical Context
The 7133LA35PFI8 implements fully asynchronous dual-port operation with independent left/right address, control, and I/O buses. Its on-chip arbitration logic resolves port-to-port contention via open-drain BUSYL/BUSYR outputs (requiring external pull-up), asserting BUSY only during simultaneous access to identical addresses.
It supports separate upper/lower byte write enable (R/WLUB/R/WLLB and R/WRUB/R/WRLB), TTL-compatible 5V ±10% supply, and battery backup mode with 2V VCC sustaining data retention. The LA variant reduces active power to 1050 mW (typ.) and standby to 1 mW (typ.) versus SA versions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 16 bits (32 KB total, organized as 2048 words × 16-bit wide) |
| Max Read Cycle Time | 35 ns - defines minimum time between successive reads on same port |
| Active Current (Typ.) | 230 mA - determines thermal design and power rail sizing under full load |
| Standby Current (Typ.) | 0.2 mA - enables ultra-low-power hold mode during CPU idle periods |
| Data Retention Voltage | 2.0 V - allows backup from coin cell or supercapacitor without regulator |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded systems |
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5V logic rails and tolerates ripple |
Pinout & Package
7133LA35PFI8 is packaged in a 68-pin Plastic Leaded Chip Carrier (PLCC), with dual-row gull-wing leads, body size ≈ 24.1 mm × 24.1 mm × 3.3 mm, and lead pitch of 1.27 mm. Pin 1 marked by corner notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A10L | Left Port Address Inputs | 11-bit address bus for left-side memory access (2048 locations) |
| A0R–A10R | Right Port Address Inputs | Independent 11-bit address bus for right-side access |
| I/O0L–I/O15L | Left Port Bidirectional Data | 16-bit parallel data path; high-impedance when OEL = VIH or CEL = VIH |
| I/O0R–I/O15R | Right Port Bidirectional Data | Independent 16-bit data path; isolated from left port electrically |
| CEL / CER | Chip Enable (Left/Right) | Active-low enables port logic; drives internal circuitry into standby when high |
| R/WLUB / R/WLLB | Left Upper/Lower Byte Write Enable | Independent write gating per byte lane - enables partial-word writes without masking |
| R/WRUB / R/WRLB | Right Upper/Lower Byte Write Enable | Same per-byte control on right port - critical for mixed-endian or packed-data systems |
| OEL / OER | Output Enable (Left/Right) | Controls I/O drivers' output state; overrides R/W for read-enable timing |
| BUSYL / BUSYR | Busy Flag (Open-Drain Output) | Indicates port contention; requires external pull-up; used for hardware stall or interrupt |
| VCC (×2) | Power Supply | Both pins must be connected to 5V ±10%; decoupling required at each pin |
| GND (×2) | Ground | Both pins must be connected to system ground; minimizes ground bounce |
Key Features
| Feature | Design Value |
|---|---|
| On-chip arbitration logic | Resolves simultaneous left/right access to same address without external logic or software polling |
| Separate byte-write control per port | Enables atomic 8-bit updates in 16-bit systems - avoids RMW cycles and bus locking |
| 2V data retention mode | Preserves memory contents during main power loss using backup source - no volatile refresh needed |
| Industrial temperature rating | Validated operation from –40°C to +85°C - suitable for motor drives, PLCs, and outdoor telecom |
| Low-power LA variant | Reduces standby current to 1 µA (typ.) - extends battery life in always-on monitoring applications |
Applications
| Real-Time DSP Co-Processing | Industrial PLC Memory Buffer |
|---|---|
|
Use Scenario: A DSP and microcontroller concurrently access shared filter coefficients and sensor buffers in a motor control loop. IC Role / Device Role / Timing Role: 7133LA35PFI8 acts as MASTER dual-port RAM, providing zero-wait-state access to both processors with hardware arbitration preventing data corruption. Use Value: Eliminates software semaphores and polling delays - ensures deterministic <35 ns inter-processor data exchange latency. |
Use Scenario: A programmable logic controller stores ladder logic variables and I/O status in nonvolatile shadow RAM during power transitions. IC Role / Device Role / Timing Role: 7133LA35PFI8 serves as fast-access scratchpad with 2V data retention, backed by supercapacitor during AC dropout. Use Value: Guarantees 100% variable state preservation for ≥10 seconds at 2V - meets IEC 61131-2 power-fail safety requirements. |
| Avionics Sensor Fusion Hub | Medical Imaging Frame Buffer |
|
Use Scenario: Multiple sensor acquisition units (IMU, GPS, barometer) stream time-synchronized data into a central fusion processor. IC Role / Device Role / Timing Role: 7133LA35PFI8 functions as synchronized data staging buffer, with left port receiving sensor streams and right port feeding fusion algorithm. Use Value: Concurrent 16-bit writes and reads eliminate FIFO bottlenecks - sustains >28 MB/s aggregate bandwidth at 35 ns cycle. |
Use Scenario: An ultrasound system captures raw RF echo data at 40 MSPS and transfers frames to image reconstruction engine. IC Role / Device Role / Timing Role: 7133LA35PFI8 operates as ping-pong frame buffer, with one port capturing while the other renders. Use Value: Hardware BUSY signaling prevents overwrites during render-read - ensures pixel-perfect frame integrity without CPU intervention. |
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-35AXC | 35 ns access, 2K × 16, but lacks on-chip arbitration; BUSY must be implemented externally | Suitable where arbitration is handled in FPGA or software; not drop-in for MASTER/SLAVE expansion | Choose if system already includes external arbitration logic and requires Cypress's longer product lifecycle support |
| Renesas R1EX24016AS0C-35 | 35 ns, 2K × 16, industrial temp, but uses single BUSY pin (not dual BUSYL/BUSYR) and no byte-write enables | Requires redesign of byte-level write control and arbitration routing; incompatible with IDT7143 SLAVE pairing | Select only for green-field designs prioritizing Renesas supply chain continuity over legacy IDT architecture reuse |
Compared with CY7C024AV-35AXC and R1EX24016AS0C-35, the 7133LA35PFI8 uniquely integrates master arbitration, dual BUSY signaling, and per-byte write enables - enabling direct, no-glue MASTER/SLAVE expansion for 32-bit+ systems without FPGA logic overhead.
Availability
7133LA35PFI8 is available at Aetrix Electronics and suitable for industrial PLCs, avionics sensor hubs, and medical imaging systems requiring stable component supply, long-term obsolescence management, and guaranteed traceable sourcing.
Supply support for 7133LA35PFI8 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 timing, memory, and interface solutions, now part of Renesas Electronics since 2019.
The IDT7133/7143 family was designed specifically for real-time embedded systems requiring deterministic, contention-free dual-processor memory sharing - targeting industrial automation, defense electronics, and medical instrumentation.
FAQ
What is the function of the BUSY pins on the 7133LA35PFI8?
The BUSYL and BUSYR pins on the 7133LA35PFI8 are open-drain outputs that signal port contention when both left and right ports attempt simultaneous access to the same memory address. They require external pull-up resistors and are used to stall the contending port's access until the first operation completes. This hardware arbitration eliminates race conditions without software intervention - a core feature distinguishing the 7133LA35PFI8 as a MASTER device.
Can the 7133LA35PFI8 operate with a 3.3V supply?
No, the 7133LA35PFI8 is specified only for 5.0 V ±10% (4.5 V to 5.5 V) operation and is TTL-compatible. It does not support 3.3V logic levels or supply voltage. Using 3.3V will result in undefined behavior, failed reads/writes, and potential data corruption. For 3.3V dual-port SRAM, consider newer families such as IDT70V24 or Renesas R1EX24016AS0C-35, which are explicitly rated for 3.3V operation.
How does the 7133LA35PFI8 differ from the IDT7143 SLAVE device?
The 7133LA35PFI8 contains on-chip arbitration logic and drives BUSY as an output, whereas the IDT7143 has BUSY as an input-only pin and no arbitration circuitry. The 7133LA35PFI8 can operate standalone or as MASTER in width-expanded systems; the 7143 must be paired with a 7133 to receive BUSY signals. Their pinouts are identical, but functional roles differ - making them complementary, not interchangeable.
What is the significance of "LA" in the 7133LA35PFI8 part number?
The "LA" suffix in 7133LA35PFI8 denotes the Low-Power Active/Standby variant: it consumes 1050 mW (typ.) during active operation and only 1 mW (typ.) in standby - significantly less than the "SA" (Standard Active) version's 1150 mW/5 mW. This reduction is achieved through optimized CMOS process and circuit design, making the 7133LA35PFI8 ideal for thermally constrained or battery-backed industrial applications.
Is the 7133LA35PFI8 RoHS-compliant and halogen-free?
Yes, the 7133LA35PFI8 is a green part compliant with RoHS Directive 2011/65/EU and halogen-free per IEC 61249-2-21. This is confirmed in the official IDT ordering information and product change notices. The "PFI8" suffix indicates lead-free (Pb-free), matte tin-plated leads, and compliance with JEDEC J-STD-020 moisture sensitivity level 3 (MSL-3) for surface-mount assembly.
7133LA35PFI8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 100-LQFP
- 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:
- 35ns
- Access Time:
- 35 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-TQFP (14x14)
7133LA35PFI8 FAQ
1.How can I place an order for 7133LA35PFI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7133LA35PFI8 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 7133LA35PFI8 reliable?
The price and inventory of 7133LA35PFI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7133LA35PFI8 is usually 5 days.
3.What payment methods are accepted for 7133LA35PFI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7133LA35PFI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7133LA35PFI8?
7133LA35PFI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7133LA35PFI8 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 7133LA35PFI8?
For technical support, including 7133LA35PFI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7133LA35PFI8 requirements.
6.How does Aetrix verify that 7133LA35PFI8 is sourced from the original manufacturer or authorized distributors?
All 7133LA35PFI8 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 7133LA35PFI8 meets industry standards.
7.What is the process for return or replacement of 7133LA35PFI8?
All 7133LA35PFI8 units undergo pre-shipment inspection (PSI). If there is an issue with 7133LA35PFI8, 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 7133LA35PFI8 part is unused and in its original packaging.
Return procedure for 7133LA35PFI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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