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Renesas 7143LA25PF8
- Part No.:
- 7143LA25PF8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
7143LA25PF8.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,156
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Product details
Overview
7143LA25PF8 from IDT is a 2K × 16-bit high-speed 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 maximum access time (industrial temperature range), 1 mW typical standby power, and battery backup data retention at 2 V. It enables 32-bit-or-wider word-width systems without external arbitration logic.
For engineers reviewing the 7143LA25PF8 datasheet, 7143LA25PF8 pinout, 7143LA25PF8 application, or 7143LA25PF8 equivalent, key selection criteria include BUSY input functionality for write inhibition, industrial-grade temperature operation (–40°C to +85°C), 68-pin PLCC package compatibility, and low-power LA-series active/standby current specs.
Technical Context
The 7143LA25PF8 operates as a SLAVE dual-port SRAM with dedicated BUSY input (not output) to receive arbitration signals from a MASTER IDT7133 device; it lacks on-chip arbitration logic and does not assert BUSY - only responds to it as a write gate control. Its dual 11-bit address buses (A0L–A10L / A0R–A10R) and separate byte-level write enables (R/WLUB/R/WLLB and R/WRUB/R/WRLB) support independent port control.
It implements full TTL-compatible interfacing with single 5V ±10% supply, supports battery backup mode at VCC = 2V with 100–4000 µA retention current, and features CMOS-based low-power design yielding 1050 mW typical active power and 1 mW standby power - optimized for embedded real-time systems requiring deterministic dual-access latency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 16-bit (32 Kbit), enabling 16-bit parallel data paths per port |
| Access Time | 25 ns max (industrial temp), guaranteeing sub-40-MHz synchronous interface timing margins |
| Supply Voltage | 5.0 V ±10%, compatible with legacy 5V TTL logic families without level shifting |
| Standby Current | 1 mA typ. (ISB3, CMOS-level CE), enabling ultra-low-power sleep modes in battery-backed systems |
| Data Retention | 2 V minimum VCC, allowing operation from coin-cell backup without regulator |
| Operating Temp | –40°C to +85°C, qualified for industrial automation and transportation control environments |
| Package | 68-pin PLCC (PLG68), surface-mountable with 0.95″ × 0.95″ footprint and standard reflow profile |
Pinout & Package
68-pin Plastic Leaded Chip Carrier (PLCC), body size ≈ 0.95 in × 0.95 in × 0.17 in; requires both VCC pins connected to 5V and both GND pins tied to ground for reliable operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Active-low port selection; drives port into standby when HIGH (1 mA ISB3 current) |
| R/WLUB / R/WRUB | Upper Byte Write Enable | Controls write to I/O8–I/O15 on respective port; enables byte-selective writes |
| R/WLLB / R/WRLB | Lower Byte Write Enable | Controls write to I/O0–I/O7 on respective port; allows 8-bit granularity memory updates |
| OEL / OER | Output Enable (Left / Right) | Tri-states I/O bus when HIGH; required for bus sharing in multi-device systems |
| BUSYL / BUSYR | Busy Input (SLAVE mode) | Write-inhibit signal: LOW blocks writes on corresponding port; requires external MASTER's BUSY output |
| A0L–A10L / A0R–A10R | Address Inputs | 11-bit addressing per port (2048 locations); no internal address latching - fully combinatorial |
| I/O0L–I/O15L / I/O0R–I/O15R | Bi-directional Data Bus | 16-bit parallel I/O per port; high-impedance when CE or OE inactive |
Key Features
| Feature | Design Value |
|---|---|
| SLAVE-only BUSY interface | Eliminates need for external arbitration logic when paired with IDT7133 MASTER, reducing BOM count and PCB area |
| Byte-selectable write control | Independent upper/lower byte enables per port allow partial-word writes without read-modify-write cycles |
| 2V data retention | Enables seamless transition to battery backup during main power loss - no data corruption below 5V |
| Industrial temperature rating | Validated operation from –40°C to +85°C ensures reliability in factory-floor PLCs and railway signaling hardware |
| Low-power LA variant | 1050 mW active / 1 mW standby reduces thermal load in dense memory modules and extends battery life |
Applications
| Real-Time Industrial PLC | Dual-CPU Communication Buffer |
|---|---|
Use Scenario: Two independent microcontrollers exchange status and control commands via shared memory in a programmable logic controller cabinet. IC Role / Device Role / Timing Role: 7143LA25PF8 serves as SLAVE buffer in a MASTER/SLAVE pair, receiving BUSY-controlled write gating from IDT7133 to prevent simultaneous writes to same address. Use Value: Enables deterministic, lock-free inter-processor communication with 25 ns access - critical for sub-millisecond scan cycle times. | Use Scenario: Host CPU and DSP co-process sensor fusion data in automotive ADAS ECU, requiring low-latency shared memory access. IC Role / Device Role / Timing Role: 7143LA25PF8 provides second 16-bit port in width-expanded 32-bit memory subsystem, synchronized via MASTER arbitration. Use Value: Eliminates software semaphores and reduces interrupt overhead by 40% versus serial mailbox schemes. |
| Redundant Control System | Legacy 5V Bus Interface Module |
Use Scenario: Primary and backup flight control computers maintain mirrored state in avionics hardware using dual-port RAM for failover coordination. IC Role / Device Role / Timing Role: 7143LA25PF8 acts as SLAVE in triple-redundant memory array, accepting BUSY from primary MASTER to enforce write ordering during switchover. Use Value: Guarantees atomic state transfer with <35 ns arbitration delay - meets DO-254 Level A timing assurance requirements. | Use Scenario: Retrofitting modern FPGA-based I/O module into legacy 5V backplane system requiring direct memory-mapped register access. IC Role / Device Role / Timing Role: 7143LA25PF8 bridges FPGA and 5V microcontroller via dual-port interface, leveraging TTL-compatible voltage levels and 25 ns timing. Use Value: Avoids level translators and timing buffers - simplifies certification for industrial safety standards (IEC 61508). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT7143SA25PF8 | SA version: higher active power (1150 mW vs. 1050 mW), no 2V data retention | Suitable for non-battery-backed commercial systems where power budget allows | Select SA if industrial temp range is sufficient and backup retention is unnecessary |
| CY7C133-25JC | Cypress part: 2K × 16, 25 ns, but uses different BUSY protocol (bidirectional) and 52-pin SOJ package | Requires PCB redesign and firmware adaptation due to pinout and arbitration logic differences | Choose only if existing design already uses CY7C133 and migration cost outweighs performance trade-offs |
Compared with IDT7143SA25PF8, the 7143LA25PF8 delivers 1 mW standby and 2V retention at identical speed and temperature rating; versus CY7C133-25JC, it offers plug-compatible PLCC packaging and simpler MASTER/SLAVE wiring but requires IDT7133 pairing for arbitration.
Availability
7143LA25PF8 is available at Aetrix Electronics and suitable for real-time industrial PLCs, dual-CPU communication buffers, redundant control systems, and legacy 5V bus interface modules requiring stable component supply across extended product lifecycles.
Supply support for 7143LA25PF8 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, and interface solutions for high-performance computing and industrial systems.
The IDT7143 product line delivers SLAVE-configured dual-port SRAMs designed specifically for width-expansion architectures with MASTER/SLAVE arbitration - targeting deterministic, low-latency shared memory in safety-critical embedded control.
FAQ
What is the role of BUSY pins on the 7143LA25PF8?
The BUSYL and BUSYR pins on the 7143LA25PF8 function exclusively as inputs - not outputs - and serve as write-inhibit controls. When pulled LOW by an external MASTER device (e.g., IDT7133), they block write operations on the corresponding port. This eliminates contention in width-expanded memory systems. The 7143LA25PF8 itself contains no arbitration logic and never asserts BUSY.
Does the 7143LA25PF8 support battery backup operation?
Yes, the 7143LA25PF8 supports battery backup data retention at VCC = 2.0 V, drawing only 100–4000 µA depending on temperature grade. This feature is exclusive to LA variants and is not available in SA versions like IDT7143SA25PF8. Retention is guaranteed under no-load conditions with CMOS-level CE inputs.
Can the 7143LA25PF8 operate as a standalone dual-port RAM without a MASTER device?
Yes, the 7143LA25PF8 can operate standalone with both BUSY pins tied HIGH (via pull-up resistors), disabling write-inhibit functionality. In this configuration, it behaves as a standard dual-port SRAM with independent port access - though simultaneous writes to the same address will cause undefined data, unlike MASTER/SLAVE setups that enforce arbitration.
What package type does the 7143LA25PF8 use, and are there alternatives?
7143LA25PF8 uses a 68-pin Plastic Leaded Chip Carrier (PLCC), designated PLG68. Alternative packages for the same part number family include 68-pin ceramic PGA (GU68), 68-pin flatpack (FP68), and 100-pin TQFP (PNG100), but the "PF8" suffix specifically denotes the PLCC variant. Pinouts are identical across all packages.
How does the 7143LA25PF8 differ from the IDT7133LA25PF8?
The 7143LA25PF8 is the SLAVE device: it accepts BUSY as input and lacks on-chip arbitration logic. The IDT7133LA25PF8 is the MASTER: it generates BUSY as an open-drain output and includes internal arbitration logic. They share identical memory size, speed, power specs, and pinout - differing only in BUSY directionality and arbitration capability.
7143LA25PF8 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-TQFP (14x14)
7143LA25PF8 FAQ
1.How can I place an order for 7143LA25PF8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7143LA25PF8 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 7143LA25PF8 reliable?
The price and inventory of 7143LA25PF8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7143LA25PF8 is usually 5 days.
3.What payment methods are accepted for 7143LA25PF8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7143LA25PF8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7143LA25PF8?
7143LA25PF8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7143LA25PF8 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 7143LA25PF8?
For technical support, including 7143LA25PF8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7143LA25PF8 requirements.
6.How does Aetrix verify that 7143LA25PF8 is sourced from the original manufacturer or authorized distributors?
All 7143LA25PF8 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 7143LA25PF8 meets industry standards.
7.What is the process for return or replacement of 7143LA25PF8?
All 7143LA25PF8 units undergo pre-shipment inspection (PSI). If there is an issue with 7143LA25PF8, 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 7143LA25PF8 part is unused and in its original packaging.
Return procedure for 7143LA25PF8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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