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Renesas 7143SA55J
- Part No.:
- 7143SA55J
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
7143SA55J.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 68PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,708
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Product details
Overview
7143SA55J from IDT is a high-speed 2K × 16 dual-port static RAM configured as a SLAVE device in MASTER/SLAVE memory expansion systems, supporting asynchronous independent read/write access on left and right ports with 55 ns max read cycle time, TTL-compatible 5V ±10% operation, and industrial temperature range (–40°C to +85°C). It enables error-free 32-bit-or-wider word-width memory systems without external logic.
For engineers reviewing the 7143SA55J datasheet, 7143SA55J pinout, 7143SA55J application, or 7143SA55J equivalent, this page delivers verified electrical specs, BUSY-input arbitration behavior, byte-select write control, battery backup capability (2V data retention), and precise package mapping for 68-pin PLCC, PGA, flatpack, and 100-pin TQFP variants.
Technical Context
The 7143SA55J operates as a SLAVE dual-port SRAM with BUSY input (not output), requiring external BUSY signal from a MASTER IDT7133 to gate write operations during address contention. Its port arbitration is fully externalized-no on-chip arbitration logic exists.
It supports separate upper/lower byte write enables (R/WLUB/R/WLLB and R/WRUB/R/WRLB), independent chip enables (CEL/CER), and output enables (OEL/OER) per port, enabling fine-grained memory control in real-time multiprocessing systems where deterministic latency and conflict resolution are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 16 bits (32 KB total, organized as 2048 words × 16-bit wide) |
| Access Time | 55 ns max read cycle time - defines minimum clock period for synchronous interface or maximum bus frequency in asynchronous systems |
| Supply Voltage | 5.0 V ±10% - compatible with legacy TTL and 5V CMOS logic families without level shifting |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including factory automation and transportation control |
| Data Retention | 2 V minimum VCC - enables battery-backed operation during main power loss, preserving contents without refresh |
| Power Dissipation | Active: 1150 mW typ.; Standby: 5 mW typ. - low quiescent draw supports energy-sensitive embedded designs |
| I/O Interface | TTL-compatible inputs/outputs - ensures direct interfacing with standard microcontrollers, FPGAs, and ASICs |
Pinout & Package
7143SA55J is available in 68-pin PLCC (PLG68), 68-pin ceramic PGA (GU68), 68-pin flatpack (FP68), and 100-pin TQFP (PNG100) packages. All variants share identical pin functions and dual-port I/O mapping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Active-low enable per port; controls port power-down mode and memory access permission |
| R/WLUB / R/WRUB | Upper Byte Write Enable (L/R) | Enables write to I/O8–I/O15 on respective port; allows byte-level granularity without masking logic |
| R/WLLB / R/WRLB | Lower Byte Write Enable (L/R) | Enables write to I/O0–I/O7 on respective port; supports 8-bit peripheral interfacing alongside 16-bit paths |
| OEL / OER | Output Enable (Left / Right) | Tri-states I/O pins independently per port; essential for bus sharing and multi-drop configurations |
| BUSYL / BUSYR | Busy Input (Left / Right) | SLAVE-only function: active-low signal that gates writes when asserted by MASTER; no internal pull-up required |
| A0L–A10L / A0R–A10R | Address Inputs (L/R) | 11-bit address per port (2048 locations); fully asynchronous - no setup/hold timing between ports |
| I/O0L–I/O15L / I/O0R–I/O15R | Bi-directional Data (L/R) | 16-bit parallel I/O per port; direction controlled by R/W and CE states - no external transceivers needed |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent asynchronous ports | Enables true concurrent CPU/DSP access to shared memory without software locks or polling overhead |
| SLAVE-specific BUSY input architecture | Eliminates "busy lock-out" in width-expanded systems by centralizing arbitration in MASTER IDT7133 |
| Byte-select write control (upper/lower) | Reduces need for external byte-enable logic in mixed 8-bit/16-bit subsystems (e.g., legacy peripherals + modern processors) |
| 2V data retention mode | Supports seamless failover to backup battery without data loss - validated for industrial-grade reliability |
| Multiple industry-standard packages | 68-pin PLCC, PGA, flatpack, and 100-pin TQFP allow layout flexibility across cost, thermal, and density requirements |
Applications
| Industrial Motion Control | Avionics Data Buffering |
|---|---|
|
Use Scenario: Real-time servo loop coordination between FPGA-based motion controller and DSP-based trajectory planner sharing position/velocity buffers. IC Role / Device Role / Timing Role: SLAVE 7143SA55J provides deterministic, contention-resolved 16-bit data exchange with guaranteed write inhibition during address collisions. Use Value: Eliminates software arbitration delays; 55 ns access enables sub-10 µs loop update rates at 100 kHz sampling. |
Use Scenario: Dual-CPU flight management system (FMS) where ARINC-429 interface processor and navigation engine concurrently access shared waypoint tables. IC Role / Device Role / Timing Role: 7143SA55J acts as SLAVE in MASTER/SLAVE pair, receiving BUSY from IDT7133 to prevent simultaneous writes to same location. Use Value: Ensures atomic updates to critical navigation data without watchdog resets or data corruption under EMI stress. |
| Medical Imaging Frame Store | Test & Measurement Pattern Generator |
|
Use Scenario: Ultrasound beamformer module buffering echo data streams from ADC array while host processor reads completed frames. IC Role / Device Role / Timing Role: 7143SA55J serves as high-bandwidth frame buffer SLAVE, leveraging separate byte enables to align 12-bit ADC samples into 16-bit words. Use Value: 2K × 16 capacity supports 2048-sample lines at 16-bit depth; 2V retention preserves last valid frame during power interruption. |
Use Scenario: Automated test equipment generating synchronized stimulus patterns while capturing response waveforms on separate channels. IC Role / Device Role / Timing Role: 7143SA55J implements dual-port pattern memory - one port loads new vectors, other reads active sequence - with hardware BUSY coordination. Use Value: Enables zero-gap pattern streaming at 18.2 MHz (55 ns cycle), eliminating FIFO underrun/overflow in high-speed digital I/O testing. |
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 CY7C1371DV33-55AXC | 3.3V core, 55 ns, 2K × 16, QDR architecture with separate read/write ports - no BUSY arbitration logic | Requires external arbitration logic for contention handling; not drop-in for MASTER/SLAVE width expansion | Select only if migrating to 3.3V system and implementing custom arbitration; not suitable for legacy 5V IDT7133/43 replacement |
| IDT7133SA55J | MASTER variant with on-chip arbitration logic and open-drain BUSY output; identical speed, voltage, and pinout | Used as MASTER in same-width systems or paired with 7143SA55J for >32-bit expansion | Required when building MASTER/SLAVE pairs; shares same footprint but differs in BUSY functionality and internal logic |
Compared with CY7C1371DV33-55AXC, 7143SA55J offers native hardware BUSY arbitration for deterministic conflict resolution in 5V systems, while IDT7133SA55J complements it as the MASTER with integrated arbitration - together they eliminate external logic in width-expanded designs.
Availability
7143SA55J is available at Aetrix Electronics and suitable for industrial motion control, avionics data buffering, and medical imaging frame store applications requiring stable component supply, long-term lifecycle support, and MIL-PRF-38535-compliant manufacturing traceability.
Supply support for 7143SA55J 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.
The IDT7133/7143 family was designed for deterministic, contention-free dual-processor memory sharing in real-time industrial, aerospace, and medical systems - prioritizing hardware arbitration, low-latency access, and robust 5V operation.
FAQ
What is the role of BUSY pins on the 7143SA55J?
The BUSYL and BUSYR pins on the 7143SA55J are dedicated inputs-not outputs-used exclusively to receive BUSY signals from a MASTER IDT7133 device. When asserted low, they internally inhibit write operations on the corresponding port, preventing data corruption during address contention. Unlike the MASTER, the 7143SA55J contains no arbitration logic and requires external BUSY coordination. This design ensures deterministic resolution in width-expanded memory systems.
Can the 7143SA55J operate standalone without a MASTER IDT7133?
Yes, the 7143SA55J can operate as a standalone dual-port SRAM without a MASTER IDT7133, provided BUSYL and BUSYR are tied HIGH (e.g., via pull-up resistors) to disable write inhibition. In this configuration, both ports function independently with full read/write capability, but hardware arbitration for simultaneous accesses to the same address is disabled. Use this mode only when software-managed access or non-overlapping address usage is guaranteed.
Which packages are available for the 7143SA55J?
The 7143SA55J is offered in four industry-standard packages: 68-pin PLCC (PLG68), 68-pin ceramic PGA (GU68), 68-pin flatpack (FP68), and 100-pin TQFP (PNG100). All share identical pin functions and electrical specifications. The 100-pin TQFP includes additional N/C pins and revised corner pad assignments but maintains full functional compatibility with the 68-pin variants for board layout reuse where thermal or density requirements differ.
Does the 7143SA55J support battery backup operation?
Yes, the 7143SA55J supports battery backup operation with guaranteed data retention at VCC ≥ 2.0 V, as specified in the LA variant datasheet section. Though labeled "SA" (Standard Active), the 7143SA55J inherits the same 2V retention capability as the LA version due to identical process and cell design. This allows seamless integration into systems with backup batteries, preserving memory contents during main power failure without external circuitry.
How does byte-select write control work on the 7143SA55J?
The 7143SA55J provides independent upper-byte (R/WLUB/R/WRUB) and lower-byte (R/WLLB/R/WRLB) write enables per port. Asserting only R/WLUB enables writing to I/O8–I/O15 while leaving I/O0–I/O7 unchanged; asserting only R/WLLB writes to I/O0–I/O7. This eliminates need for external byte masking logic and supports mixed 8-bit/16-bit subsystems - e.g., connecting an 8-bit microcontroller to half the bus while a 16-bit DSP uses the full width.
7143SA55J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 68-LCC (J-Lead)
- Packaging:
- Tube
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 68-PLCC (24.21x24.21)
7143SA55J FAQ
1.How can I place an order for 7143SA55J through Aetrix?
Please submit a Request for Quotation (RFQ) for 7143SA55J 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 7143SA55J reliable?
The price and inventory of 7143SA55J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7143SA55J is usually 5 days.
3.What payment methods are accepted for 7143SA55J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7143SA55J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7143SA55J?
7143SA55J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7143SA55J 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 7143SA55J?
For technical support, including 7143SA55J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7143SA55J requirements.
6.How does Aetrix verify that 7143SA55J is sourced from the original manufacturer or authorized distributors?
All 7143SA55J 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 7143SA55J meets industry standards.
7.What is the process for return or replacement of 7143SA55J?
All 7143SA55J units undergo pre-shipment inspection (PSI). If there is an issue with 7143SA55J, 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 7143SA55J part is unused and in its original packaging.
Return procedure for 7143SA55J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7143SA55J Tags
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M24C02-WMN6TP
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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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