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Renesas 7143SA25PF
- Part No.:
- 7143SA25PF
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
7143SA25PF.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,678
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Product details
Overview
7143SA25PF from IDT is a high-speed 2K × 16 dual-port static RAM configured as a SLAVE device in MASTER/SLAVE memory expansion systems, supporting independent asynchronous read/write access on left and right ports with 25 ns max read cycle time (commercial & industrial temperature range), TTL-compatible 5V ±10% supply, and battery backup data retention down to 2V. It enables 32-bit-or-wider word-width systems without external arbitration logic.
For engineers reviewing the 7143SA25PF datasheet, 7143SA25PF pinout, 7143SA25PF application, or 7143SA25PF equivalent, this page delivers verified specifications, package mapping, port arbitration behavior, BUSY input timing, and real-world use cases for dual-CPU, real-time control, and legacy military avionics memory subsystems.
Technical Context
The 7143SA25PF operates as a SLAVE dual-port SRAM with BUSY pin functioning exclusively as an input-unlike the MASTER IDT7133-enabling hardware write inhibition during address contention. Its architecture supports fully asynchronous, independent port access with separate byte-level write controls (R/WLUB/R/WLLB and R/WRUB/R/WRLB) and dedicated chip enable (CEL/CER) and output enable (OEL/OER) per port.
It features automatic power-down via CE control, low-power active operation (typ. 1150 mW), and 1 µA typical standby current (LA variant), but the SA variant prioritizes speed over ultra-low standby. The device implements no on-chip arbitration logic-arbitration is delegated entirely to the MASTER IDT7133-and requires precise tWH (write hold after BUSY) timing (20 ns min) for reliable contention resolution in width-expanded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 2K × 16 (32,768 bits), dual-port, asynchronous SRAM |
| Max Read Cycle Time | 25 ns - defines minimum clock-to-clock interval for back-to-back reads on either port |
| Operating Voltage | 5.0 V ±10% - single-supply TTL compatibility; no level-shifting required in 5V systems |
| Temperature Range | –40°C to +85°C - qualified for industrial applications; not rated for military –55°C/+125°C |
| Active Current (Typ.) | 230 mA - determines thermal design margin and regulator sizing for sustained dual-port operation |
| Standby Current (Typ.) | 5 µA - enables low-power sleep modes when both ports are disabled (CE = VIH) |
| BUSY Function | Input-only - asserts write inhibit when MASTER signals contention; no internal arbitration logic |
Pinout & Package
7143SA25PF is packaged in a 68-pin PLCC (PLG68) with 0.95″ × 0.95″ footprint. Both VCC pins must be connected to 5V and both GND pins to ground for reliable operation. Pin 1 is marked by a corner notch; orientation follows standard PLCC top-view convention.
| 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 addresses |
| I/O0L–I/O15L / I/O0R–I/O15R | Bidirectional Data Bus (Left/Right) | 16-bit parallel data path per port; high-impedance state when OE/CE inactive prevents bus contention |
| CEL / CER | Chip Enable (Left/Right) | Active-low enables port logic and memory array; disables all outputs and reduces current to ISB1/ISB2 levels |
| OEL / OER | Output Enable (Left/Right) | Active-low enables I/O drivers; allows read data output while CE remains active for write-ready state |
| R/WLUB / R/WRUB | Upper Byte Write Enable (Left/Right) | Controls write to I/O8–I/O15; enables byte-selective writes without disturbing lower byte |
| R/WLLB / R/WRLB | Lower Byte Write Enable (Left/Right) | Controls write to I/O0–I/O7; supports partial-word updates critical in multi-processor synchronization |
| BUSYL / BUSYR | BUSY Input (Left/Right) | As SLAVE, BUSY pins accept arbitration signal from MASTER; write is gated if asserted (VIH) |
| VCC (Pins 17, 51) | Power Supply | Dual VCC pins ensure stable voltage distribution across high-current I/O switching; both must be decoupled |
| GND (Pins 26, 62) | Ground Reference | Dual GND pins minimize ground bounce during simultaneous 32-bit writes across MASTER/SLAVE pair |
Key Features
| Feature | Design Value |
|---|---|
| SLAVE-only BUSY interface | Eliminates need for external OR gates or arbitration logic when paired with IDT7133 MASTER; simplifies PCB routing and timing closure |
| Separate upper/lower byte write control | Enables atomic 8-bit updates in shared memory regions-critical for semaphore handling between independent processors |
| 25 ns commercial/industrial speed grade | Supports 40 MHz sustained dual-port throughput in real-time control loops without wait states |
| 5V TTL-compatible I/O | Direct interfacing with legacy microcontrollers (e.g., Motorola 68000, Intel 80C188) without level translators or bus buffers |
| 68-pin PLCC package | Provides robust thermal and mechanical performance for conduction-cooled industrial enclosures; compatible with wave-solder reflow profiles |
Applications
| Real-Time Dual-CPU Systems | Military Avionics Data Buffers |
|---|---|
Use Scenario: Two independent CPUs share sensor fusion data via a common memory region with strict coherency requirements. IC Role / Device Role / Timing Role: SLAVE 7143SA25PF receives BUSY-driven write inhibition from MASTER IDT7133 during address collisions, ensuring deterministic arbitration without software overhead. Use Value: Eliminates race conditions in flight control law updates by guaranteeing atomic 16-bit writes-even under worst-case 25 ns timing skew between CPU buses. |
Use Scenario: Radar signal processor and mission computer exchange processed track files through a hardened shared memory buffer. IC Role / Device Role / Timing Role: 7143SA25PF operates in industrial temperature range (–40°C to +85°C) with 2V data retention, enabling safe power-loss recovery in airborne platforms. Use Value: Maintains target list integrity during brownout events; no volatile data loss occurs when main 5V rail drops below 2V but backup battery sustains memory. |
| Industrial PLC Memory Expansion | Legacy Test Equipment Memory Subsystem |
Use Scenario: Programmable logic controller expands I/O mapping table beyond 16-bit width using multiple dual-port RAMs. IC Role / Device Role / Timing Role: As SLAVE, 7143SA25PF accepts delayed write pulses synchronized to MASTER's BUSY deassertion, enabling seamless 32-bit word construction. Use Value: Achieves full 32-bit bandwidth without FPGA glue logic-reducing BOM cost and increasing field-replaceability of memory modules. |
Use Scenario: Automated test system uses dual-port RAM to buffer high-speed digitizer samples while host PC performs post-processing. IC Role / Device Role / Timing Role: Left port captures 25 ns-cycle data from ADC; right port streams to PCI bus via DMA controller-no software intervention required. Use Value: Sustains 40 MB/s continuous streaming (25 ns × 16 bits = 40 Mwords/s) with zero dropped samples due to asynchronous port isolation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT7133SA25PF | MASTER device with on-chip arbitration logic and open-drain BUSY output; includes port arbitration priority setup (tAPS) | Required when building standalone dual-port system or first device in width-expanded chain; cannot operate as SLAVE | Select IDT7133SA25PF only as the MASTER in any multi-chip width-expansion configuration |
| CY7C024AV-25AXC | 2K × 16 dual-port SRAM with integrated busy logic, 3.3V supply, and 25 ns access; no separate SA/LA variants | Requires level-shifting for 5V legacy systems; lacks 2V data retention and MIL-PRF-38535 QML qualification | Choose CY7C024AV-25AXC only for new 3.3V designs where QML compliance is not mandated |
Compared with IDT7133SA25PF and CY7C024AV-25AXC, the 7143SA25PF uniquely serves as a drop-in SLAVE in existing IDT MASTER/SLAVE architectures-preserving proven timing margins, eliminating redesign risk, and maintaining QML-38535 traceability for defense programs.
Availability
7143SA25PF is available at Aetrix Electronics and suitable for real-time dual-CPU systems, military avionics data buffers, and industrial PLC memory expansion requiring stable component supply, long-term obsolescence management, and MIL-PRF-38535 QML-compliant sourcing.
Supply support for 7143SA25PF 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 since 2019.
The IDT7133/7143 family was designed specifically for high-reliability dual-processor memory sharing in aerospace, defense, and industrial control-emphasizing deterministic arbitration, 5V TTL compatibility, and QML-38535 qualification.
FAQ
What is the role of 7143SA25PF in a MASTER/SLAVE dual-port RAM configuration?
The 7143SA25PF functions exclusively as a SLAVE device: its BUSY pins (BUSYL/BUSYR) serve as inputs that receive arbitration signals from a MASTER IDT7133. When BUSY is asserted, internal write gating prevents data corruption during address contention. Unlike the MASTER, it contains no arbitration logic-its sole purpose is scalable width expansion with guaranteed timing alignment.
Does 7143SA25PF support battery backup data retention?
No-7143SA25PF is the SA (Standard Active) variant and does not support battery backup. Only LA variants (e.g., 7143LA25PF) provide 2V data retention. The SA version prioritizes 25 ns speed and higher active current (1150 mW typ.) over ultra-low standby power, making it unsuitable for battery-backed applications.
Can 7143SA25PF operate as a standalone dual-port RAM without a MASTER device?
Yes-but with critical limitations: BUSY pins must be tied HIGH to disable write inhibition, and no hardware arbitration is available. Concurrent writes to the same address from both ports will result in undefined data. For deterministic operation under contention, pairing with IDT7133SA25PF as MASTER is mandatory.
What is the significance of the 'PF' suffix in 7143SA25PF?
The 'PF' suffix denotes the 68-pin PLCC (Plastic Leaded Chip Carrier) package-specifically the PLG68 variant with 0.95″ × 0.95″ body size and JEDEC-standard pin layout. This package is RoHS-compliant, reflow-solderable, and mechanically robust for industrial vibration environments, distinguishing it from PGA (GU68), flatpack (FP68), or TQFP (PNG100) variants.
How does 7143SA25PF handle simultaneous read operations on both ports?
Simultaneous reads to different addresses on left and right ports are fully supported with no timing penalty-the device guarantees tRC = 25 ns for each port independently. BUSY has no effect during non-contenting reads; valid data appears after tAA (25 ns max) from address assertion, with no inter-port delay or arbitration overhead.
7143SA25PF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 100-LQFP
- 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:
- 25ns
- Access Time:
- 25 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-TQFP (14x14)
7143SA25PF FAQ
1.How can I place an order for 7143SA25PF through Aetrix?
Please submit a Request for Quotation (RFQ) for 7143SA25PF 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 7143SA25PF reliable?
The price and inventory of 7143SA25PF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7143SA25PF is usually 5 days.
3.What payment methods are accepted for 7143SA25PF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7143SA25PF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7143SA25PF?
7143SA25PF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7143SA25PF 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 7143SA25PF?
For technical support, including 7143SA25PF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7143SA25PF requirements.
6.How does Aetrix verify that 7143SA25PF is sourced from the original manufacturer or authorized distributors?
All 7143SA25PF 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 7143SA25PF meets industry standards.
7.What is the process for return or replacement of 7143SA25PF?
All 7143SA25PF units undergo pre-shipment inspection (PSI). If there is an issue with 7143SA25PF, 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 7143SA25PF part is unused and in its original packaging.
Return procedure for 7143SA25PF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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