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Renesas 7133SA55PFI8
- Part No.:
- 7133SA55PFI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
7133SA55PFI8.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,164
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Product details
Overview
7133SA55PFI8 from IDT is a high-speed 2K × 16 dual-port static RAM with master arbitration logic, 55 ns maximum read cycle time, TTL-compatible 5 V ±10% operation, and industrial temperature range (–40°C to +85°C). It enables independent asynchronous access from left and right ports in real-time systems such as digital signal processors and telecom line cards.
For engineers reviewing the 7133SA55PFI8 datasheet, 7133SA55PFI8 pinout, 7133SA55PFI8 application, or 7133SA55PFI8 equivalent, key selection criteria include BUSY arbitration timing (tBDD ≤ 35 ns), byte-selectable write control per port, dual-port data retention at 2 V, and compatibility with 68-pin PLCC packaging for legacy board designs.
Technical Context
The 7133SA55PFI8 implements fully asynchronous dual-port architecture with separate address, control, and I/O buses for left and right ports. Its on-chip arbitration logic resolves contention when both ports access the same memory location, asserting open-drain BUSYL/BUSYR outputs to stall conflicting writes.
It supports independent byte-write enable (R/WLUB/R/WLLB and R/WRUB/R/WRLB) and output enable (OEL/OER) per port, enabling partial-word updates without read-modify-write cycles. The device enters low-power standby (ISB3 ≤ 0.2 mA typ.) when both chip enables (CEL/CER) are deasserted at CMOS levels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 16 bits = 4,096 words × 16-bit data width; supports 32-bit bus expansion via MASTER/SLAVE configuration with IDT7143. |
| Read Cycle Time | 55 ns max - defines minimum time between successive reads; enables operation up to ~18 MHz sustained random access. |
| Supply Voltage | 5.0 V ±10% - single-rail TTL-compatible interface; requires both VCC pins connected for reliable operation. |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments; excludes military-grade variants (e.g., 7133SM55PFI8). |
| Standby Current | 0.2 mA typ. (ISB3) - ultra-low power retention mode with CMOS-level CE inputs; critical for battery-backed systems. |
| Data Retention | 2 V minimum - maintains stored data during brown-out or backup battery operation; verified for LA variants but applicable to SA under same conditions. |
| Package | 68-pin PLCC (PLG68) - surface-mount, leaded package with 0.95″ × 0.95″ footprint; compatible with legacy reflow and wave-solder processes. |
Pinout & Package
68-pin Plastic Leaded Chip Carrier (PLCC) package with dual-row gull-wing leads. Body size ≈ 0.95 in × 0.95 in × 0.17 in. Requires connection of both VCC and GND pins for stable operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A10L / A0R–A11R | Address Inputs | 11-bit address per port; selects one of 2K locations independently on left/right sides. |
| I/O0L–I/O15L / I/O0R–I/O15R | Bidirectional Data | 16-bit parallel data path per port; high-impedance when OEL/OER or CEL/CER inactive. |
| CEL / CER | Chip Enable | Active-low enable per port; controls power-down mode and memory access gating. |
| R/WLUB / R/WRUB R/WLLB / R/WRLB | Byte Write Enable | Separate upper/lower byte write control per port; enables 8-bit granularity writes without external logic. |
| OEL / OER | Output Enable | Active-low tri-state control for I/O drivers; allows shared bus usage with other devices. |
| BUSYL / BUSYR | Busy Flag | Open-drain output (7133SA) indicating port contention; requires external pull-up; used for hardware arbitration. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip arbitration logic | Resolves simultaneous access to identical addresses by asserting BUSY flags - eliminates need for external priority encoders or glue logic. |
| Independent byte-write control | Enables selective update of upper or lower 8 bits per port without read-modify-write overhead - reduces bus traffic in protocol processing. |
| 2 V data retention | Maintains valid memory contents during main supply dropout - supports seamless switchover to backup battery in telecom or avionics systems. |
| Asynchronous dual-port operation | Allows concurrent read/write from left and right ports with no clock synchronization - essential for real-time interprocessor communication. |
| TTL-compatible interface | Direct interfacing with legacy 5 V microcontrollers and FPGAs without level-shifting - simplifies integration into existing industrial control boards. |
Applications
| Digital Signal Processing Systems | Telecom Line Interface Cards |
|---|---|
Use Scenario: Two DSPs exchange filter coefficients and intermediate results via shared memory without software coordination. IC Role / Device Role / Timing Role: Dual-port SRAM acts as zero-latency inter-processor buffer with hardware arbitration preventing write collisions. Use Value: Eliminates CPU polling or semaphore overhead; 55 ns access ensures real-time response in voice/data packet processing. | Use Scenario: TDM frame buffers store incoming/outgoing PCM channels across multiple E1/T1 interfaces. IC Role / Device Role / Timing Role: Left port handles receive DMA, right port serves transmit DMA - independent timing avoids FIFO bottlenecks. Use Value: Sustained 18 MHz random access supports full-rate 2.048 Mbps E1 channel aggregation without cycle stealing. |
| Industrial Motion Controllers | Avionics Display Management Units |
Use Scenario: PLC CPU writes motion profiles while dedicated servo ASIC reads and executes trajectory points. IC Role / Device Role / Timing Role: 7133SA55PFI8 provides deterministic, contention-free access to shared parameter tables. Use Value: BUSY arbitration guarantees profile integrity during dynamic updates; 2 V retention preserves settings during brief power loss. | Use Scenario: Flight display processor writes graphics primitives while rendering engine reads and composites frames. IC Role / Device Role / Timing Role: Acts as dual-port framebuffer with separate read/write bandwidth paths for overlay composition. Use Value: Asynchronous operation prevents display tearing; PLCC package meets DO-254 mechanical reliability requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C133-55JC | 55 ns access, 2K × 16, but lacks on-chip arbitration logic; BUSY must be implemented externally. | Suitable only where software-managed access or external arbitration is acceptable. | Choose when cost sensitivity outweighs need for hardware contention resolution. |
| IDT7143SA55PFI8 | Same speed and pinout, but SLAVE-only; BUSY is input-only, no arbitration logic. | Used only in width-expanded systems with a 7133SA master; cannot operate standalone as arbitrator. | Select only as companion to 7133SA in 32-bit+ bus configurations. |
Compared with CY7C133-55JC and IDT7143SA55PFI8, the 7133SA55PFI8 uniquely integrates master arbitration logic and open-drain BUSY outputs - enabling drop-in replacement in legacy IDT-based systems requiring hardware-enforced mutual exclusion without redesigning control logic.
Availability
7133SA55PFI8 is available at Aetrix Electronics and suitable for digital signal processing systems, telecom line interface cards, and industrial motion controllers requiring stable component supply and long-term obsolescence management.
Supply support for 7133SA55PFI8 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 requiring deterministic, contention-free dual-port memory access - particularly in telecom infrastructure, industrial automation, and aerospace avionics.
FAQ
What is the maximum operating temperature range for the 7133SA55PFI8?
The 7133SA55PFI8 is rated for industrial temperature operation from –40°C to +85°C. This is confirmed in the "Maximum Operating Temperature and Supply Voltage" table, where the Industrial grade specifies this range at 5.0 V ±10%. It does not meet military-grade specifications (–55°C to +125°C), which apply only to SM-suffixed variants.
Does the 7133SA55PFI8 support battery backup operation?
Yes, the 7133SA55PFI8 supports data retention at 2 V, as specified in the Data Retention Characteristics table. While the LA variant is explicitly characterized for low-current retention (ICCDR ≤ 4000 µA), the SA variant shares the same 2 V VDR threshold and retains data under brown-out conditions - verified by device characterization per Table 8.
Is the 7133SA55PFI8 pin-compatible with the IDT7143SA55PFI8?
Yes, the 7133SA55PFI8 and IDT7143SA55PFI8 share identical pinouts across all packages including 68-pin PLCC, as stated in the "Description" section: "The IDT7133/7143 devices have identical pinouts." However, BUSYL/BUSYR function differs: output on 7133SA, input on 7143SA - requiring schematic review before substitution.
What is the purpose of the tAPS parameter in the 7133SA55PFI8 timing specifications?
tAPS (Arbitration Priority Set-up Time) is the minimum time required between address assertion on both ports before BUSY arbitration activates. For the 7133SA55PFI8, tAPS is 5 ns min - ensuring the master logic correctly determines which port gains access when addresses match. Failure to meet tAPS may result in undefined BUSY assertion per Timing Waveform Note 2.
Can the 7133SA55PFI8 operate with only one port enabled?
Yes, the 7133SA55PFI8 supports asymmetric operation: one port can be active (CEL or CER = VIL) while the other remains in full standby (ISB4 ≤ 100 mA typ. for SA). This is validated in Table 7a/b under ISB2 and ISB4 test conditions, enabling power-optimized designs where only one side communicates intermittently.
7133SA55PFI8 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:
- 55ns
- Access Time:
- 55 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)
7133SA55PFI8 FAQ
1.How can I place an order for 7133SA55PFI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7133SA55PFI8 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 7133SA55PFI8 reliable?
The price and inventory of 7133SA55PFI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7133SA55PFI8 is usually 5 days.
3.What payment methods are accepted for 7133SA55PFI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7133SA55PFI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7133SA55PFI8?
7133SA55PFI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7133SA55PFI8 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 7133SA55PFI8?
For technical support, including 7133SA55PFI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7133SA55PFI8 requirements.
6.How does Aetrix verify that 7133SA55PFI8 is sourced from the original manufacturer or authorized distributors?
All 7133SA55PFI8 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 7133SA55PFI8 meets industry standards.
7.What is the process for return or replacement of 7133SA55PFI8?
All 7133SA55PFI8 units undergo pre-shipment inspection (PSI). If there is an issue with 7133SA55PFI8, 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 7133SA55PFI8 part is unused and in its original packaging.
Return procedure for 7133SA55PFI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7133SA55PFI8 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
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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
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24AA02UIDT-I/OT
Microchip Technology
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AT24C08C-STUM-T
Microchip Technology
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