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Renesas 7143SA25J
- Part No.:
- 7143SA25J
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
7143SA25J.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 68PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,714
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Product details
Overview
7143SA25J 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 maximum read cycle time (commercial & industrial temperature range), TTL-compatible 5V ±10% supply, and battery-backed data retention down to 2V. It enables error-free 32-bit-or-wider memory systems without external logic.
For engineers reviewing the 7143SA25J datasheet, 7143SA25J pinout, 7143SA25J application, or 7143SA25J equivalent, this page delivers verified timing parameters, BUSY input behavior, byte-select write control, power-down modes, and validated alternatives for dual-port SRAM system design.
Technical Context
The 7143SA25J operates as a SLAVE dual-port SRAM with BUSY pin functioning exclusively as an input - unlike the MASTER IDT7133 - enabling hardware arbitration in width-expanded systems. It supports separate upper/lower byte write enables (R/WLUB/R/WLLB and R/WRUB/R/WRLB) and fully asynchronous operation from either port.
It features automatic power-down via chip enable (CE), with four standby current modes (ISB1–ISB4) depending on CE state and input voltage levels. The device retains data at VCC = 2V (LA version only), but 7143SA25J is SA-grade and does not support data retention - confirmed by absence of VDR/ICCDR specs in SA characterization tables.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 16 bits (32,768 bits total); supports independent 16-bit access per port |
| Access Time (tRC) | 25 ns max (commercial & industrial temp range); defines minimum read cycle interval |
| Supply Voltage | 5.0 V ±10% (4.5–5.5 V); single-supply TTL-compatible interface |
| Operating Temperature | –40°C to +85°C (industrial grade); validated across full range for reliability |
| Dynamic Current (ICC) | 230 mA typ. (both ports active, f = fMAX); critical for thermal and PSU sizing |
| Standby Current (ISB1) | 25 mA max (both CE high, TTL-level inputs); determines low-power idle consumption |
| Input/Output Capacitance | 11 pF max (CIN/COUT); impacts signal integrity and trace routing in high-speed designs |
Pinout & Package
7143SA25J is available in 68-pin PLCC (PLG68), 68-pin ceramic PGA (GU68), 68-pin flatpack (FP68), and 100-pin TQFP (PNG100) packages. This entry corresponds to the 68-pin PLCC variant per standard ordering code suffix "J".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A10L | Left port address inputs | 11-bit address bus for left-side memory access (2K = 2¹¹ locations) |
| A0R–A10R | Right port address inputs | Independent 11-bit address bus for right-side access |
| I/O0L–I/O15L | Left port bidirectional data | 16-bit data path; direction controlled by R/WLUB/R/WLLB and OEL |
| I/O0R–I/O15R | Right port bidirectional data | 16-bit data path; direction controlled by R/WRUB/R/WRLB and OER |
| CEL / CER | Chip enable (left/right) | Active-low enables respective port; controls power-down mode when high |
| R/WLUB / R/WLLB | Left upper/lower byte write enable | Independent byte-level write control for left port (TTL-compatible) |
| R/WRUB / R/WRLB | Right upper/lower byte write enable | Independent byte-level write control for right port |
| OEL / OER | Output enable (left/right) | Active-low enables I/O drivers; high-Z when disabled |
| BUSYL / BUSYR | Busy flag (input only on 7143) | BUSYR is input-only; used to stall writes during contention (no pull-up required) |
| VCC (×2) | Power supply | Both pins must be connected to 5V ±10%; ensures stable core and I/O operation |
| GND (×2) | Ground | Both pins must be connected to system ground; reduces noise and improves timing margin |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent asynchronous ports | Enables concurrent CPU/DSP access without software arbitration or clock synchronization |
| SLAVE BUSY input architecture | Eliminates "busy lock-out" in width-expanded systems by deferring arbitration to MASTER IDT7133 |
| Byte-selectable write control | Permits partial-word writes (upper/lower byte) without read-modify-write cycles |
| Four-tier standby power management | Supports ISB1–ISB4 modes for granular power optimization based on CE and input voltage states |
| TTL-compatible 5V interface | Direct connection to legacy microcontrollers and FPGAs without level-shifting circuitry |
Applications
| Industrial Motion Control | Avionics Data Buffering |
|---|---|
Use Scenario: Real-time coordination between motion controller and servo drive firmware using shared memory for position setpoints and status feedback. IC Role / Device Role / Timing Role: SLAVE dual-port RAM synchronizing deterministic updates between two independent real-time processors. Use Value: Eliminates software semaphore overhead and guarantees atomic 16-bit transfers with ≤25 ns latency per read cycle. |
Use Scenario: Buffering sensor fusion data (IMU, GPS, air data) between flight management computer and display processor in DO-254-compliant avionics. IC Role / Device Role / Timing Role: High-reliability SLAVE memory enabling simultaneous read/write access under MIL-PRF-38535 QML compliance. Use Value: Supports concurrent access without bus contention, validated for –40°C to +85°C operation and radiation-tolerant packaging options. |
| Medical Imaging Pipeline | Test Equipment Pattern Memory |
Use Scenario: Storing frame buffers between FPGA-based image acquisition engine and ARM-based UI processor in portable ultrasound devices. IC Role / Device Role / Timing Role: Dual-port SRAM acting as zero-latency inter-processor bridge with byte-select write capability for partial frame updates. Use Value: Enables 25 ns read cycles and independent port arbitration - critical for maintaining real-time video throughput without dropped frames. |
Use Scenario: Storing stimulus/response patterns in automated test equipment (ATE) where pattern generator and comparator operate concurrently. IC Role / Device Role / Timing Role: SLAVE memory in MASTER/SLAVE configuration ensuring deterministic write inhibition during address collisions. Use Value: Prevents erroneous writes during simultaneous access, leveraging hardware BUSY input to gate R/W signals - no firmware intervention required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT7143SA35J | Slower 35 ns access time; military temperature range (–55°C to +125°C) supported | Suitable for aerospace or defense platforms requiring extended thermal qualification | Select when environmental robustness outweighs speed; same pinout and function as 7143SA25J |
| Cypress CY7C028V-25AXC | 2K × 16, 25 ns, but includes on-chip arbitration logic and BUSY output (MASTER-capable) | Can operate standalone or as MASTER; lacks dedicated SLAVE BUSY-input-only behavior | Choose if system requires flexible MASTER/SLAVE reconfiguration or integrated arbitration without external IDT7133 |
Compared with IDT7143SA35J, 7143SA25J delivers faster timing for latency-critical industrial control; compared with CY7C028V-25AXC, it provides stricter SLAVE semantics and guaranteed BUSY-input-only operation - essential for deterministic width-expansion topologies.
Availability
7143SA25J is available at Aetrix Electronics and suitable for industrial motion control, avionics data buffering, and medical imaging pipeline applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for 7143SA25J 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 semiconductor company specializing in timing, memory interface, RF, and sensor solutions, now part of Renesas Electronics since 2019.
The IDT7143 product line was designed specifically as SLAVE dual-port SRAMs to pair with IDT7133 MASTER devices, enabling scalable, contention-free memory expansion in real-time embedded systems.
FAQ
What is the role of BUSYR on the 7143SA25J?
BUSYR on the 7143SA25J functions exclusively as an input - unlike the MASTER IDT7133 - and is used to receive BUSY arbitration signals from the MASTER device. When asserted low, it gates internal write operations on the right port to prevent contention. No pull-up resistor is required, as BUSYR is not an open-drain output. This behavior is fundamental to the SLAVE role of the 7143SA25J in width-expanded systems.
Does the 7143SA25J support battery backup data retention?
No, the 7143SA25J does not support battery backup data retention. That feature is exclusive to LA-grade variants (e.g., 7143LA25J), which specify VDR = 2.0 V and ICCDR ≤ 4000 µA. The "SA" suffix denotes standard power grade, and all DC electrical characteristics tables for SA versions omit data retention parameters - confirming its absence in the 7143SA25J.
Can the 7143SA25J operate as a standalone dual-port RAM without a MASTER device?
Yes, the 7143SA25J can operate as a standalone dual-port RAM. Its two independent ports support fully asynchronous reads and writes without external arbitration. However, BUSYR must be tied HIGH (or driven high externally) to disable write inhibition - since no MASTER is present to assert BUSY. In this mode, contention resolution relies on system-level software or external logic.
What is the significance of the "J" suffix in 7143SA25J?
The "J" suffix in 7143SA25J indicates the 68-pin PLCC (plastic leaded chip carrier) package per IDT's standard ordering nomenclature. This matches the PLG68 footprint shown in the functional diagrams and pin configurations. Other variants include "F" (flatpack), "G" (ceramic PGA), and "N" (100-pin TQFP). Package selection affects thermal performance, board space, and rework feasibility.
How does the 7143SA25J differ from the IDT7133SA25J in system integration?
The 7143SA25J is a SLAVE-only device: BUSYR is an input, no on-chip arbitration logic, and no BUSY output capability. In contrast, IDT7133SA25J is a MASTER with BUSYL as open-drain output, built-in arbitration logic, and BUSY-driven priority resolution. They are complementary - not interchangeable - and intended for paired use in width-expanded systems where only one MASTER arbitrates across multiple SLAVES.
7143SA25J 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:
- 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:
- 68-PLCC (24.21x24.21)
7143SA25J FAQ
1.How can I place an order for 7143SA25J through Aetrix?
Please submit a Request for Quotation (RFQ) for 7143SA25J 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 7143SA25J reliable?
The price and inventory of 7143SA25J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7143SA25J is usually 5 days.
3.What payment methods are accepted for 7143SA25J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7143SA25J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7143SA25J?
7143SA25J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7143SA25J 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 7143SA25J?
For technical support, including 7143SA25J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7143SA25J requirements.
6.How does Aetrix verify that 7143SA25J is sourced from the original manufacturer or authorized distributors?
All 7143SA25J 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 7143SA25J meets industry standards.
7.What is the process for return or replacement of 7143SA25J?
All 7143SA25J units undergo pre-shipment inspection (PSI). If there is an issue with 7143SA25J, 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 7143SA25J part is unused and in its original packaging.
Return procedure for 7143SA25J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7143SA25J Tags
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