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Renesas 7133SA25PFI8
- Part No.:
- 7133SA25PFI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
7133SA25PFI8.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,737
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Product details
Overview
7133SA25PFI8 from IDT is a high-speed 2K × 16 dual-port SRAM with master arbitration logic, 25ns max access time (industrial grade), TTL-compatible 5V ±10% operation, and open-drain BUSY output for port contention management - used in real-time DSP co-processing, military avionics bus interfaces, and redundant controller memory subsystems.
For engineers reviewing the 7133SA25PFI8 datasheet, 7133SA25PFI8 pinout, 7133SA25PFI8 application, or 7133SA25PFI8 equivalent, key selection criteria include industrial temperature support (–40°C to +85°C), byte-selectable write control per port, on-chip arbitration, battery backup data retention (2V), and compatibility with 68-pin PLCC packaging for legacy board integration.
Technical Context
The 7133SA25PFI8 implements fully asynchronous dual-port architecture with independent left/right address, control, and I/O buses. Its on-chip arbitration logic resolves simultaneous accesses to identical addresses by asserting BUSYL/BUSYR flags - with BUSY output active only on the MASTER (IDT7133) variant and configured as input on SLAVE (IDT7143).
It supports separate upper/lower byte write enables (R/WLUB/R/WLLB and R/WRUB/R/WRLB), enabling partial-word writes without read-modify-write cycles. The device enters low-power standby (<5mW typ.) when CE is high, and retains data down to 2V for battery backup operation - verified under industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 16 bits = 4,096 words × 16-bit wide - supports full 16-bit parallel data paths per port without external multiplexing. |
| Access Time | 25ns (max) at –40°C to +85°C - guarantees deterministic timing for hard real-time interrupt handlers and synchronous bus protocols. |
| Supply Voltage | 5.0V ±10% (4.5V–5.5V) - compatible with legacy 5V TTL logic families and eliminates level-shifting requirements. |
| Power Consumption | Active: 1150mW (typ); Standby: 5mW (typ) - enables low-duty-cycle operation in power-constrained embedded systems. |
| Data Retention | 2V minimum VCC - allows seamless switchover to backup battery during main supply interruption without data loss. |
| Operating Temp | –40°C to +85°C - qualified for industrial automation, transportation, and ruggedized communications equipment. |
| Package | 68-pin PLCC (PLG68) - surface-mount compatible with standard reflow profiles and repair-friendly socketing options. |
Pinout & Package
68-pin Plastic Leaded Chip Carrier (PLCC), body size ≈ 0.95 in × 0.95 in × 0.17 in. Dual-row, J-lead package with pin 1 index notch at top-left corner (top view). Requires both VCC and GND pins connected 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 2K locations; independent addressing enables concurrent access to different memory regions. |
| I/O0L–I/O15L / I/O0R–I/O15R | Bidirectional Data Bus (Left/Right) | 16-bit parallel I/O per port; high-impedance tri-state when OE inactive or CE high - prevents bus contention. |
| CEL / CER | Chip Enable (Left/Right) | Active-low enable per port; controls power-down mode - unselected port draws <5mW standby current. |
| R/WLUB/R/WLLB / R/WRUB/R/WRLB | Byte Write Enable (Upper/Lower) | Independent control of upper (I/O8–I/O15) and lower (I/O0–I/O7) bytes - enables atomic 8-bit updates without full-word reads. |
| OEL / OER | Output Enable (Left/Right) | Active-low gating of output drivers; allows shared bus usage with other peripherals via time-multiplexed read access. |
| BUSYL / BUSYR | Busy Flag (Left/Right) | Open-drain output (MASTER only); asserts when same-address contention occurs - requires external pull-up resistor for logic-high level. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip arbitration logic | Resolves simultaneous left/right port access to identical addresses without external logic - eliminates need for discrete priority encoders or glue logic. |
| Separate byte write enables | Enables independent 8-bit writes to upper/lower halves of 16-bit word - avoids destructive read-modify-write sequences in mixed-data-size applications. |
| 2V data retention | Maintains stored contents during brown-out or main supply failure - supports fail-safe state preservation in safety-critical controllers. |
| TTL-compatible I/O | Direct interface with 5V microcontrollers, FPGAs, and ASICs - no level translators required for legacy system integration. |
| Industrial temperature rating | Validated operation from –40°C to +85°C - suitable for under-hood automotive ECUs, factory-floor PLCs, and outdoor telecom base stations. |
Applications
| Real-Time DSP Co-Processor Memory | Military Avionics Bus Interface |
|---|---|
Use Scenario: Dual-CPU system where DSP handles signal processing while host MCU manages I/O and scheduling - both require low-latency, non-blocking access to shared coefficient tables and buffers. IC Role / Device Role / Timing Role: 7133SA25PFI8 serves as synchronized shared memory with hardware arbitration - eliminating software semaphores and reducing inter-processor latency to sub-25ns. Use Value: Enables deterministic, lock-free data exchange between asymmetric processors - critical for radar pulse compression and synthetic aperture imaging pipelines. | Use Scenario: Redundant flight control computer exchanging sensor fusion results and actuator commands across dual MIL-STD-1553B channels with strict timing deadlines. IC Role / Device Role / Timing Role: 7133SA25PFI8 acts as fault-tolerant cross-channel buffer - using BUSY signaling to serialize conflicting writes during transient synchronization faults. Use Value: Prevents inconsistent state propagation between redundant channels - satisfying DO-254 Level A design assurance requirements for airborne systems. |
| Industrial PLC I/O Mapping Table | Telecom Line Card Packet Buffer |
Use Scenario: Programmable logic controller storing dynamic I/O mapping tables and ladder logic state variables - accessed concurrently by scan engine and HMI update task. IC Role / Device Role / Timing Role: 7133SA25PFI8 provides deterministic read/write isolation between cyclic scan and event-driven HMI updates - with byte-select writes minimizing bus occupancy. Use Value: Guarantees cycle-time predictability in safety-rated SIL3 applications - avoiding jitter-induced watchdog timeouts during high-priority diagnostics. | Use Scenario: High-density line card buffering Ethernet frames between PHY and switch fabric - requiring zero-wait-state access for ingress/egress packet steering. IC Role / Device Role / Timing Role: 7133SA25PFI8 functions as dual-port frame descriptor cache - allowing simultaneous descriptor fetch (by MAC) and status update (by DMA engine). Use Value: Eliminates descriptor queue bottlenecks at 100Mbps+ line rates - sustaining full wire-speed forwarding without packet loss under burst traffic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port RAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C133-25JC | 2K × 16, 25ns, 5V, 68-pin PLCC - lacks on-chip arbitration; BUSY must be implemented externally with discrete logic. | No native contention resolution - requires additional gates and PCB area; unsuitable for systems needing guaranteed atomicity without firmware intervention. | Select when cost sensitivity outweighs arbitration requirement and board space permits external logic. |
| IDT7143SA25PFI8 | Same speed, package, and pinout - but SLAVE-only variant with BUSY input only (no arbitration logic or BUSY output). | Must be paired with IDT7133 as MASTER; cannot operate standalone in arbitration-required roles. | Choose only for width-expansion configurations where IDT7133 handles arbitration centrally. |
Compared with CY7C133-25JC and IDT7143SA25PFI8, the 7133SA25PFI8 uniquely integrates arbitration logic and open-drain BUSY output in a single 68-pin PLCC - delivering hardware-enforced mutual exclusion without layout overhead or timing uncertainty from external components.
Availability
7133SA25PFI8 is available at Aetrix Electronics and suitable for real-time DSP co-processing, military avionics bus interfaces, and industrial PLC I/O mapping requiring stable component supply across extended product lifecycles.
Supply support for 7133SA25PFI8 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, computing, and industrial markets.
The IDT7133 family was designed specifically for deterministic, contention-free dual-processor memory sharing - targeting aerospace, defense, and industrial control systems demanding hardware-level arbitration and 25ns industrial-grade timing.
FAQ
What is the operating temperature range specified for the 7133SA25PFI8?
The 7133SA25PFI8 is rated for industrial temperature operation from –40°C to +85°C. This specification is explicitly confirmed in the datasheet's "Maximum Operating Temperature and Supply Voltage" table and applies to all speed grades marked "SA" or "LA" with industrial qualification. The 7133SA25PFI8 meets this range with 25ns access time guaranteed across the full span.
Does the 7133SA25PFI8 include on-chip arbitration logic, and how does it function?
Yes, the 7133SA25PFI8 includes dedicated on-chip arbitration logic - a defining feature distinguishing it from SLAVE variants like IDT7143. When both ports attempt access to the same memory address simultaneously, the 7133SA25PFI8 asserts BUSYL or BUSYR (open-drain outputs) to stall the contending port. This hardware arbitration eliminates race conditions without software intervention or external logic.
What package type is used for the 7133SA25PFI8, and what are its mechanical dimensions?
The 7133SA25PFI8 uses a 68-pin Plastic Leaded Chip Carrier (PLCC), designated PLG68 in IDT documentation. Its body measures approximately 0.95 inches × 0.95 inches × 0.17 inches (24.1 mm × 24.1 mm × 4.3 mm), with J-leads suitable for standard surface-mount reflow processes and socket-based prototyping.
Can the 7133SA25PFI8 retain data during power loss, and at what voltage threshold?
Yes, the 7133SA25PFI8 supports battery backup data retention down to 2.0V (VDR = 2.0V min), as specified in Table 08 of the datasheet. This capability is inherent to the SA/LA family and enables nonvolatile state preservation during main supply interruption - critical for fail-safe operation in industrial and avionics applications.
How does the byte-write enable functionality work on the 7133SA25PFI8?
The 7133SA25PFI8 provides separate upper-byte (R/WLUB/R/WRUB) and lower-byte (R/WLLB/R/WRLB) write enables for each port. Activating only one pair allows writing to either I/O0–I/O7 (lower byte) or I/O8–I/O15 (upper byte) independently - enabling efficient 8-bit updates without read-modify-write cycles or bus locking, directly supported by the internal memory array architecture.
7133SA25PFI8 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:
- 25ns
- Access Time:
- 25 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)
7133SA25PFI8 FAQ
1.How can I place an order for 7133SA25PFI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7133SA25PFI8 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 7133SA25PFI8 reliable?
The price and inventory of 7133SA25PFI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7133SA25PFI8 is usually 5 days.
3.What payment methods are accepted for 7133SA25PFI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7133SA25PFI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7133SA25PFI8?
7133SA25PFI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7133SA25PFI8 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 7133SA25PFI8?
For technical support, including 7133SA25PFI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7133SA25PFI8 requirements.
6.How does Aetrix verify that 7133SA25PFI8 is sourced from the original manufacturer or authorized distributors?
All 7133SA25PFI8 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 7133SA25PFI8 meets industry standards.
7.What is the process for return or replacement of 7133SA25PFI8?
All 7133SA25PFI8 units undergo pre-shipment inspection (PSI). If there is an issue with 7133SA25PFI8, 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 7133SA25PFI8 part is unused and in its original packaging.
Return procedure for 7133SA25PFI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7133SA25PFI8 Tags
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M24C02-WMN6TP
STMicroelectronics
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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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