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Renesas 7143SA25J8
- Part No.:
- 7143SA25J8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
7143SA25J8.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 68PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,964
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Product details
Overview
7143SA25J8 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 access on left and right ports with 25 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 memory systems without external logic.
For engineers reviewing the 7143SA25J8 datasheet, 7143SA25J8 pinout, 7143SA25J8 application, or 7143SA25J8 equivalent, key selection criteria include BUSY input behavior (not output), byte-selectable write control per port, 25 ns access timing, dual-port arbitration compatibility with IDT7133SA25J8, and 68-pin PLCC package mechanical fit.
Technical Context
The 7143SA25J8 operates as a SLAVE dual-port SRAM with BUSY pin functioning exclusively as an input for write inhibition-unlike the MASTER IDT7133, which drives BUSY as an open-drain output. It lacks on-chip arbitration logic and relies on external BUSY signaling from a MASTER device.
It supports fully asynchronous reads/writes on both ports, features separate upper/lower byte write enables (R/WLUB/R/WLLB and R/WRUB/R/WRLB), and implements automatic power-down via chip enable (CEL/CER) with standby current as low as 1.0 mA (typ.) under CMOS-level inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 16 bits (32 Kbit), enabling 16-bit data path per port |
| Access Time (tRC) | 25 ns max - defines minimum read cycle interval for reliable timing closure |
| Supply Voltage | 5.0 V ±10% - requires single TTL-compatible rail; no dual-supply or level-shifting needed |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments without derating |
| Standby Current (ISB3) | 1.0 mA typ. - enables ultra-low-power retention when both ports disabled via CMOS-level CE |
| Bus Interface | Independent left/right address/data/control - permits concurrent CPU/DSP access without software coordination |
| Battery Retention | Not supported - SA variant lacks 2V data retention; LA variant required for backup mode |
Pinout & Package
7143SA25J8 is packaged in a 68-pin Plastic Leaded Chip Carrier (PLCC), with lead count, footprint, and thermal profile compatible across IDT7133/7143 family variants. Both VCC and GND pins must be connected to ensure reliable operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A10L / A0R–A10R | Address Inputs (Left/Right) | 11-bit addressing per port → 2K depth; bidirectional routing required for shared bus architectures |
| I/O0L–I/O15L / I/O0R–I/O15R | Data I/O (Left/Right) | 16-bit bidirectional data bus per port; requires tristate management during writes |
| CEL / CER | Chip Enable (Left/Right) | Active-low enables respective port; controls power-down state and output impedance |
| R/WLUB / R/WRUB | Upper Byte Write Enable (L/R) | Enables write to I/O8–I/O15 only; allows partial-word updates without read-modify-write |
| R/WLLB / R/WRLB | Lower Byte Write Enable (L/R) | Enables write to I/O0–I/O7 only; critical for byte-aligned peripheral interfacing |
| OEL / OER | Output Enable (Left/Right) | Controls output drivers independently; enables simultaneous read/write on different ports |
| BUSYL / BUSYR | BUSY Input (Left/Right) | SLAVE-only function: asserts write inhibit when driven LOW by MASTER's BUSY output |
Key Features
| Feature | Design Value |
|---|---|
| SLAVE-only BUSY interface | Eliminates need for external arbitration logic when paired with IDT7133 MASTER; simplifies 32-bit+ width expansion |
| Byte-selectable write control | Reduces bus contention and eliminates unnecessary full-word writes in mixed-data-width systems |
| Asynchronous dual-port operation | Enables real-time co-processing between host CPU and DSP/FPGA without clock domain synchronization |
| Low standby power (1.0 mA typ.) | Extends system uptime in battery-backed industrial controllers where memory must retain state during sleep |
| TTL-compatible I/O | Direct interface with legacy microcontrollers and FPGAs without level translators or pull-up networks |
Applications
| Industrial Motion Controller | Telecom Line Card Buffer |
|---|---|
Use Scenario: Real-time servo loop execution and command buffering between FPGA motion engine and ARM host processor. IC Role / Device Role / Timing Role: SLAVE dual-port RAM providing synchronized data exchange with IDT7133 MASTER to avoid BUSY lockout during simultaneous axis updates. Use Value: 25 ns access ensures sub-µs latency for position feedback loops; byte-write enables precise register-mapped peripheral updates. |
Use Scenario: Packet buffering between TDM framer ASIC and packet processor in carrier-grade line cards. IC Role / Device Role / Timing Role: SLAVE port handles framer-side writes while MASTER port services packet processor reads - coordinated via BUSY handshake. Use Value: Asynchronous dual-port eliminates FIFO synchronization overhead; 68-pin PLCC fits dense telecom PCB layouts. |
| Avionics Display Processor | Medical Imaging Data Pipeline |
Use Scenario: Frame buffer sharing between graphics controller and safety-monitoring MCU in DO-254-certified displays. IC Role / Device Role / Timing Role: SLAVE 7143SA25J8 receives pixel data writes from GPU; MASTER IDT7133 reads for HUD overlay generation. Use Value: Industrial temp rating ensures reliability at cockpit operating extremes; no external arbitration reduces certification effort. |
Use Scenario: Real-time transfer of ADC-sampled sensor data from acquisition FPGA to image reconstruction processor. IC Role / Device Role / Timing Role: Dual-port acts as zero-latency pipeline stage - one port captures raw scan lines, other feeds reconstruction engine. Use Value: 2K × 16 capacity matches typical ultrasound line buffer depth; 25 ns timing supports >40 MHz pixel clocks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT7133SA25J8 | MASTER device with BUSY output, on-chip arbitration logic, and identical 25 ns timing | Required as controlling unit in MASTER/SLAVE pairs; cannot operate standalone as SLAVE | Select when implementing full arbitration-capable dual-port node or first device in width-expanded array |
| CY7C133-25JC | 2K × 16 dual-port SRAM with integrated BUSY arbitration, 25 ns access, but no SLAVE/Master distinction | Self-contained arbitration eliminates need for pairing; different pinout and control signal mapping | Choose for simpler two-chip systems where external BUSY routing is undesirable or board space limits PLCC use |
Compared with IDT7133SA25J8, the 7143SA25J8 provides no arbitration logic and requires external BUSY coordination, making it strictly dependent on a MASTER; compared with CY7C133-25JC, it trades self-contained arbitration for guaranteed compatibility within IDT's MASTER/SLAVE ecosystem and identical pinout.
Availability
7143SA25J8 is available at Aetrix Electronics and suitable for industrial motion control, telecom line card buffering, avionics display systems, and medical imaging data pipelines requiring stable component supply across extended product lifecycles.
Supply support for 7143SA25J8 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 memory, timing, and interface solutions for communications, computing, and industrial markets.
The IDT7133/7143 family was designed specifically for deterministic, low-latency dual-processor and co-processor memory sharing in real-time embedded systems - prioritizing bus concurrency, arbitration robustness, and industrial reliability over density or cost-per-bit.
FAQ
Is 7143SA25J8 pin-compatible with IDT7133SA25J8?
Yes, 7143SA25J8 shares identical pinout and package with IDT7133SA25J8, including 68-pin PLCC layout and signal assignments. However, functional differences exist: BUSYL/BUSYR are inputs on 7143SA25J8 but open-drain outputs on IDT7133SA25J8, requiring appropriate pull-up configuration on the MASTER side. This compatibility enables drop-in replacement in width-expanded designs when role assignment is preserved.
What is the role of BUSY pins on 7143SA25J8?
On 7143SA25J8, BUSYL and BUSYR serve exclusively as write-inhibit inputs - not outputs. When driven LOW by a MASTER device (e.g., IDT7133SA25J8), they block pending write operations on the corresponding port. This behavior eliminates internal arbitration logic, making 7143SA25J8 dependent on external BUSY coordination and unsuitable as a standalone arbitrator.
Does 7143SA25J8 support battery backup operation?
No, 7143SA25J8 does not support battery backup. The "SA" suffix denotes standard power version; only "LA" variants (e.g., 7143LA25J8) provide 2V data retention capability. For applications requiring data persistence during main power loss, the LA variant must be selected - it draws ≤100 µA typical in retention mode at 2V.
Can 7143SA25J8 operate without a MASTER device?
Yes, 7143SA25J8 can operate as a standalone dual-port SRAM without a MASTER, provided BUSYL and BUSYR are tied HIGH (e.g., via pull-up resistors) to disable write inhibition. In this mode, it functions identically to a standard dual-port RAM with independent left/right access - but loses hardware contention resolution, requiring software-managed arbitration.
What is the maximum operating frequency implied by 25 ns access time?
The 25 ns maximum read cycle time (tRC) of 7143SA25J8 implies a theoretical maximum sustained read throughput of 40 MHz (1/25 ns). However, actual system clock rate depends on bus protocol overhead, address setup/hold, and output enable timing - tAOE (15 ns max) and tHZ (15 ns max) further constrain achievable bandwidth in real-world interfaces.
7143SA25J8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 68-LCC (J-Lead)
- 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:
- 68-PLCC (24.21x24.21)
7143SA25J8 FAQ
1.How can I place an order for 7143SA25J8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7143SA25J8 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 7143SA25J8 reliable?
The price and inventory of 7143SA25J8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7143SA25J8 is usually 5 days.
3.What payment methods are accepted for 7143SA25J8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7143SA25J8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7143SA25J8?
7143SA25J8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7143SA25J8 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 7143SA25J8?
For technical support, including 7143SA25J8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7143SA25J8 requirements.
6.How does Aetrix verify that 7143SA25J8 is sourced from the original manufacturer or authorized distributors?
All 7143SA25J8 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 7143SA25J8 meets industry standards.
7.What is the process for return or replacement of 7143SA25J8?
All 7143SA25J8 units undergo pre-shipment inspection (PSI). If there is an issue with 7143SA25J8, 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 7143SA25J8 part is unused and in its original packaging.
Return procedure for 7143SA25J8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7143SA25J8 Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
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24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
STMicroelectronics
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AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
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24LC01BT-I/SN
Microchip Technology
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24AA02UIDT-I/OT
Microchip Technology
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AT24C08C-STUM-T
Microchip Technology
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