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Renesas 7143SA35G
- Part No.:
- 7143SA35G
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-BPGA
- Datasheet:
-
7143SA35G.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 68PGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,451
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Product details
Overview
7143SA35G 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 read/write on independent left/right ports with 35 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 systems without external logic.
For engineers reviewing the 7143SA35G datasheet, 7143SA35G pinout, 7143SA35G application, or 7143SA35G equivalent, this page delivers verified timing parameters, BUSY-input arbitration behavior, package-specific pin mapping, and real-world use cases for embedded multiprocessing, military avionics, and real-time control systems requiring deterministic port-to-port contention resolution.
Technical Context
The 7143SA35G operates as a SLAVE dual-port SRAM with BUSY pin functioning exclusively as an input - unlike the MASTER IDT7133 - enabling hardware write-inhibit arbitration when paired with a 7133-series MASTER. It supports fully asynchronous, independent access on both ports with separate address, control, and I/O buses.
Its architecture includes byte-level write enable (R/WLUB/R/WLLB and R/WRUB/R/WRLB), open-drain-compatible BUSY input (requires external pull-up when used as interrupt flag), and automatic power-down via chip enable (CE) with 1 mW typical standby power in LA variants - though 7143SA35G is SA-grade with 5 mW typical standby.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 16 bits (32,768 bits total), organized as 2048 words × 16-bit data width per port |
| Max Read Cycle Time | 35 ns - defines minimum clock period for synchronous controllers interfacing at full speed |
| 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 systems |
| Standby Current | 5 mA typical - enables low-power idle states in battery-backed or energy-sensitive applications |
| Bus Interface | Fully asynchronous dual-port - permits independent, non-synchronized read/write on left and right ports |
| BUSY Function | Input-only - gates internal write operations when asserted, eliminating need for external arbitration logic |
Pinout & Package
7143SA35G is available in 68-pin PLCC (PLG68), 68-pin ceramic PGA (GU68), 68-pin flatpack (FP68), and 100-pin TQFP (PNG100) packages. Pin functions are identical across all variants per datasheet revision Jun.16.21.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A10L / A0R–A11R | Address Inputs (Left/Right) | 11-bit address bus per port - selects one of 2048 memory locations independently |
| I/O0L–I/O15L / I/O0R–I/O15R | Bidirectional Data I/O | 16-bit parallel data path per port - supports simultaneous read/write across ports with contention detection |
| CEL / CER | Chip Enable (Left/Right) | Active-low enable - places respective port in active or ultra-low-power standby mode |
| R/WLUB / R/WRUB | Upper-Byte Write Enable | Controls write to I/O8–I/O15 on left/right port - enables byte-selective writes without masking logic |
| R/WLLB / R/WRLB | Lower-Byte Write Enable | Controls write to I/O0–I/O7 on left/right port - essential for mixed-data-size transactions |
| OEL / OER | Output Enable (Left/Right) | Tri-states I/O pins during reads - prevents bus contention in multi-device systems |
| BUSYL / BUSYR | BUSY Input (Left/Right) | SLAVE-only function - halts pending write if asserted; requires external pull-up for interrupt use |
| VCC (×2) / GND (×2) | Power & Ground | Dual VCC/GND pairs ensure stable noise margin and current distribution across high-speed switching |
Key Features
| Feature | Design Value |
|---|---|
| SLAVE-only BUSY input | Eliminates need for external arbitration logic when paired with IDT7133 MASTER - reduces BOM count and PCB area |
| Independent byte-write control | Enables atomic updates to upper/lower bytes without read-modify-write cycles - critical for real-time register shadowing |
| Asynchronous dual-port operation | Permits CPU and DSP (or two CPUs) to access shared memory concurrently with deterministic latency - no clock domain crossing required |
| Industrial temperature rating | Validated operation from –40°C to +85°C - suitable for under-hood automotive ECUs and outdoor telecom equipment |
| 5V TTL compatibility | Direct interface with legacy microcontrollers, FPGAs, and ASICs without level translators - simplifies system integration |
Applications
| Real-Time Digital Signal Processing | Military Avionics Data Buffering |
|---|---|
Use Scenario: Two independent processors (e.g., radar signal processor and flight control unit) share sensor data via dual-port RAM with deterministic contention resolution. IC Role / Device Role / Timing Role: SLAVE 7143SA35G receives BUSY signal from MASTER 7133 to gate writes during address collisions - ensuring data coherency without software overhead. Use Value: Eliminates race conditions in safety-critical systems by enforcing hardware-enforced write serialization at sub-40 ns latency. |
Use Scenario: Redundant flight computers exchange telemetry and command status using synchronized dual-port memory in MIL-PRF-38535 QML-compliant hardware. IC Role / Device Role / Timing Role: 7143SA35G serves as SLAVE in width-expanded 32-bit memory subsystem - accepts BUSY-driven write inhibit from MASTER during cross-channel arbitration. Use Value: Meets DO-254 design assurance requirements by removing arbitration logic from FPGA fabric - reducing verification scope and failure modes. |
| Industrial PLC Shared Memory | Test Equipment Pattern Generator |
Use Scenario: Programmable Logic Controller uses dual-CPU architecture where one CPU handles I/O scanning and another runs motion control algorithms - sharing position and velocity buffers. IC Role / Device Role / Timing Role: 7143SA35G provides dedicated 16-bit port for motion controller while MASTER handles HMI communication - BUSY input prevents overwrites during buffer swaps. Use Value: Enables jitter-free motion profiling by guaranteeing atomic 16-bit updates to trajectory tables without CPU intervention. |
Use Scenario: Automated test system generates high-speed digital patterns using one port for pattern loading and second port for real-time result capture. IC Role / Device Role / Timing Role: As SLAVE device, 7143SA35G synchronizes pattern writes with MASTER's BUSY assertion - ensuring glitch-free transitions between test vectors. Use Value: Achieves <100 ns inter-vector timing accuracy required for high-speed SerDes compliance 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 |
|---|---|---|---|
| IDT7143SA25G | 25 ns max read cycle time - faster access but limited to commercial/industrial grade only | Suitable for cost-sensitive industrial controllers where 25 ns timing suffices and 35 ns margin is unnecessary | Select when system clock allows tighter timing budgets and qualification for extended temperature is not required |
| Cypress CY7C024AV-35AXC | 32K × 16 organization, 35 ns access, 3.3V core - different voltage domain and larger capacity | Used in newer designs migrating from 5V to 3.3V infrastructure; requires level-shifting for legacy interfaces | Choose for green-field 3.3V systems needing higher density; avoid in 5V-only or MIL-spec environments |
Compared with IDT7143SA25G and CY7C024AV-35AXC, the 7143SA35G uniquely balances military-grade reliability, 5V compatibility, and SLAVE-specific BUSY input behavior - making it irreplaceable in width-expanded MASTER/SLAVE architectures requiring guaranteed arbitration timing at –40°C to +85°C.
Availability
7143SA35G is available at Aetrix Electronics and suitable for real-time digital signal processing, military avionics data buffering, and industrial PLC shared memory applications requiring stable component supply across extended product lifecycles.
Supply support for 7143SA35G 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, RF, and high-performance silicon solutions, now part of Renesas Electronics.
The IDT7133/7143 family was designed specifically for deterministic dual-processor memory sharing in aerospace, defense, and industrial control systems - emphasizing hardware arbitration, wide temperature operation, and seamless width expansion.
FAQ
What is the role of BUSY pins on the 7143SA35G?
The BUSY pins (BUSYL and BUSYR) on the 7143SA35G function strictly as inputs - unlike the MASTER IDT7133 where they are outputs. When asserted HIGH, they inhibit write operations on the corresponding port. This SLAVE-specific behavior enables hardware-based arbitration without external logic when paired with a 7133-series MASTER. The 7143SA35G does not drive BUSY; it responds to it.
Does the 7143SA35G support battery backup operation?
No - battery backup with 2V data retention is exclusive to LA-grade variants (e.g., 7143LA35G). The 7143SA35G is an SA-grade device with active power consumption of 1150 mW typical and standby of 5 mW typical at 5V. Its design prioritizes speed and industrial temperature performance over ultra-low-power retention.
Can the 7143SA35G be used as a standalone dual-port RAM without a MASTER?
Yes - the 7143SA35G operates fully as a standalone 2K × 16 dual-port SRAM. Its BUSY inputs can be tied HIGH (via pull-up resistors) to disable arbitration, allowing independent read/write on both ports. However, in concurrent write scenarios to the same address, no hardware resolution occurs - software or system-level coordination is required.
Which packages are available for the 7143SA35G?
The 7143SA35G 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 pinouts and electrical characteristics per datasheet revision Jun.16.21 - enabling drop-in substitution based on mechanical or thermal constraints.
How does the 7143SA35G differ from the IDT7133SA35G?
The 7143SA35G is the SLAVE counterpart to the MASTER IDT7133SA35G. Key differences: BUSY pins are inputs (not outputs), no on-chip arbitration logic, and no BUSY output flag generation. While both share identical memory size, timing, and pinout, only the 7133 implements priority resolution - making the 7143SA35G dependent on an external MASTER for contention management.
7143SA35G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 68-BPGA
- 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:
- 35ns
- Access Time:
- 35 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 68-PGA (29.46x29.46)
7143SA35G FAQ
1.How can I place an order for 7143SA35G through Aetrix?
Please submit a Request for Quotation (RFQ) for 7143SA35G 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 7143SA35G reliable?
The price and inventory of 7143SA35G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7143SA35G is usually 5 days.
3.What payment methods are accepted for 7143SA35G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7143SA35G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7143SA35G?
7143SA35G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7143SA35G 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 7143SA35G?
For technical support, including 7143SA35G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7143SA35G requirements.
6.How does Aetrix verify that 7143SA35G is sourced from the original manufacturer or authorized distributors?
All 7143SA35G 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 7143SA35G meets industry standards.
7.What is the process for return or replacement of 7143SA35G?
All 7143SA35G units undergo pre-shipment inspection (PSI). If there is an issue with 7143SA35G, 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 7143SA35G part is unused and in its original packaging.
Return procedure for 7143SA35G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7143SA35G 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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24AA02UIDT-I/OT
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AT24C08C-STUM-T
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