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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Renesas 7143LA90J8

Name: 7143LA90J8
Brand: Renesas
SKU: 7143LA90J8
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 7143LA90J8

Manufacturer:: Renesas

Category:: Memory

Package:: 68-LCC (J-Lead)

Datasheet:: 7143LA90J8.pdf

Description:: IC SRAM 32KBIT PARALLEL 68PLCC

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Product details

Overview

7143LA90J8 from IDT (Integrated Device Technology) is a low-power, 2K × 16-bit dual-port static RAM configured as a SLAVE device in MASTER/SLAVE memory expansion systems. It supports independent asynchronous access on left and right ports, features 90ns maximum read cycle time, 2V data retention for battery backup operation, and operates at 5V ±10% with industrial temperature range (–40°C to +85°C). It is used in real-time embedded systems requiring concurrent CPU/DSP access to shared memory.

For engineers reviewing the 7143LA90J8 datasheet, 7143LA90J8 pinout, 7143LA90J8 application, or 7143LA90J8 equivalent, this page delivers verified specifications including BUSY input timing, byte-select write control, standby current (1µA typ.), TQFP-100 package mapping, and functional distinction from IDT7133LA master devices.

Technical Context

The 7143LA90J8 implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port - enabling simultaneous read/write operations without internal arbitration logic. Its BUSY pin functions exclusively as an input (unlike the IDT7133's open-drain BUSY output), allowing external arbitration signals to gate write cycles during address contention.

It supports TTL-compatible signaling, single 5V supply, and battery backup mode with guaranteed 2V data retention. The LA variant reduces active power consumption to 1050mW (typ.) and standby current to 1µA (typ.), making it suitable for power-sensitive industrial controllers and telecom line cards where deterministic latency and low quiescent draw are critical.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	2K × 16-bit (32,768 bits); provides 16-bit wide data path per port for efficient word-aligned access.
Access Time	90ns max read cycle time (tRC); ensures deterministic latency for real-time DSP co-processing and FPGA host interfaces.
Supply Voltage	5.0V ±10%; compatible with standard TTL logic families and legacy 5V system rails without level-shifting.
Standby Current	1µA typical (ISB3, CMOS-level inputs); enables ultra-low-power sleep modes in battery-backed systems.
Data Retention	2V minimum VCC; retains memory contents during brown-out or backup battery operation without refresh.
Operating Temp	–40°C to +85°C industrial grade; qualified for deployment in harsh environments like motor drives and base station equipment.
Package	100-pin TQFP (PNG100); surface-mount footprint with 0.5mm pitch, optimized for high-density PCB layouts.

Pinout & Package

7143LA90J8 is packaged in a 100-pin Thin Quad Flat Package (TQFP), designated PNG100. The package measures 14mm × 14mm × 1.4mm and features exposed thermal pad (not electrically connected) for enhanced heat dissipation in sustained dual-port operation.

Pin/Terminal	Circuit Role	Design Meaning
CEL / CER	Chip Enable (Left / Right)	Active-low enables respective port; when HIGH, places port in full standby (ISB3 = 1µA typ.).
R/WLUB / R/WRUB	Upper Byte Write Enable	Controls write to I/O8–I/O15 on left/right port; enables byte-granular writes without disturbing lower byte.
R/WLLB / R/WRLB	Lower Byte Write Enable	Controls write to I/O0–I/O7 on left/right port; supports 8-bit peripheral interfacing alongside 16-bit core access.
OEL / OER	Output Enable (Left / Right)	Tri-states I/O pins independently; allows one port to drive bus while other remains high-Z for contention-free sharing.
BUSYL / BUSYR	Busy Input (Left / Right)	Asynchronous write-inhibit signal; when LOW, blocks write cycles on corresponding port during arbitration.
A0L–A10L / A0R–A10R	Address Inputs	11-bit address bus per port; decodes 2K (2048) locations; no internal address latching required.
I/O0L–I/O15L / I/O0R–I/O15R	Bi-directional Data Bus	16-bit parallel I/O per port; TTL-compatible drive strength supports direct connection to microcontrollers and FPGAs.

Key Features

Feature	Design Value
SLAVE-only BUSY interface	Eliminates need for external arbitration logic when paired with IDT7133 MASTER; BUSY pins function strictly as write-gate inputs.
Byte-select write control	Independent upper/lower byte enables (R/WLUB/R/WLLB and R/WRUB/R/WRLB) allow partial-word updates without read-modify-write overhead.
2V data retention	Preserves memory contents during main power loss using backup battery; eliminates volatile SRAM volatility in fail-safe applications.
Ultra-low standby current	1µA typical ISB3 (both ports disabled with CMOS-level inputs); extends battery life in always-on monitoring systems.
Industrial temperature rating	Qualified from –40°C to +85°C; meets reliability requirements for transportation, energy, and factory automation deployments.

Applications

Real-Time DSP Co-Processing	Redundant Control Systems
Use Scenario: Dual-core processor pair (e.g., ARM + DSP) shares sensor data buffers with strict timing deadlines. IC Role / Device Role / Timing Role: SLAVE dual-port RAM providing non-blocking memory access; BUSY input prevents write collisions during simultaneous address requests. Use Value: Eliminates software arbitration overhead and guarantees sub-90ns memory access latency for jitter-sensitive control loops.	Use Scenario: Safety-critical PLC with primary and hot-standby controllers synchronizing state via shared memory. IC Role / Device Role / Timing Role: SLAVE device in MASTER/SLAVE configuration; receives BUSY signal from IDT7133 MASTER to coordinate write sequencing. Use Value: Ensures atomic state updates across redundant channels without race conditions or data corruption.
Telecom Line Card Buffering	FPGA-Based Protocol Bridge
Use Scenario: High-speed serial interface (e.g., JESD204B) buffers incoming packet data before DMA transfer to host processor. IC Role / Device Role / Timing Role: Dual-port SRAM acting as ping-pong buffer; left port accepts streaming data, right port services CPU reads. Use Value: 16-bit width and 90ns access enable sustained 100+ MB/s throughput without FIFO bottlenecks.	Use Scenario: FPGA bridges PCIe and custom parallel bus, requiring low-latency translation between protocol widths and timing domains. IC Role / Device Role / Timing Role: SLAVE memory enabling FPGA to stage data for burst transfers while maintaining deterministic response to host requests. Use Value: Byte-select write enables partial register updates; 2V retention preserves bridge configuration during power cycling.

Real-Time DSP Co-Processing

Redundant Control Systems

Use Scenario: Dual-core processor pair (e.g., ARM + DSP) shares sensor data buffers with strict timing deadlines.

IC Role / Device Role / Timing Role: SLAVE dual-port RAM providing non-blocking memory access; BUSY input prevents write collisions during simultaneous address requests.

Use Value: Eliminates software arbitration overhead and guarantees sub-90ns memory access latency for jitter-sensitive control loops.

Use Scenario: Safety-critical PLC with primary and hot-standby controllers synchronizing state via shared memory.

IC Role / Device Role / Timing Role: SLAVE device in MASTER/SLAVE configuration; receives BUSY signal from IDT7133 MASTER to coordinate write sequencing.

Use Value: Ensures atomic state updates across redundant channels without race conditions or data corruption.

Telecom Line Card Buffering

FPGA-Based Protocol Bridge

Use Scenario: High-speed serial interface (e.g., JESD204B) buffers incoming packet data before DMA transfer to host processor.

IC Role / Device Role / Timing Role: Dual-port SRAM acting as ping-pong buffer; left port accepts streaming data, right port services CPU reads.

Use Value: 16-bit width and 90ns access enable sustained 100+ MB/s throughput without FIFO bottlenecks.

Use Scenario: FPGA bridges PCIe and custom parallel bus, requiring low-latency translation between protocol widths and timing domains.

IC Role / Device Role / Timing Role: SLAVE memory enabling FPGA to stage data for burst transfers while maintaining deterministic response to host requests.

Use Value: Byte-select write enables partial register updates; 2V retention preserves bridge configuration during power cycling.

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 CY7C1371DV33-133AXC	3.3V supply, 133MHz QDR interface, 1M × 18-bit; no BUSY arbitration logic or 2V retention.	Targets high-bandwidth networking ASICs; incompatible with 5V TTL systems and battery backup use cases.	Select only for new 3.3V designs requiring QDR performance; not drop-in replaceable.
IDT7133LA90J8	MASTER variant with on-chip arbitration logic and open-drain BUSY output; identical speed, package, and power specs.	Required when building standalone dual-port or MASTER/SLAVE systems needing hardware arbitration.	Use as companion MASTER to 7143LA90J8 in width-expanded 32-bit+ memory systems.

Compared with CY7C1371DV33-133AXC, 7143LA90J8 offers 5V compatibility and battery retention but lacks QDR bandwidth; compared with IDT7133LA90J8, it removes arbitration logic to reduce complexity and cost in slave-only roles - simplifying layout and firmware integration.

Availability

7143LA90J8 is available at Aetrix Electronics and suitable for real-time DSP co-processing, redundant control systems, and telecom line card buffering requiring stable component supply across extended production lifecycles.

Supply support for 7143LA90J8 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, now part of Renesas Electronics.

The IDT7143 family was designed specifically for SLAVE-side dual-port memory expansion in industrial and telecom systems, enabling scalable 32-bit+ word widths without external arbitration logic or timing penalties.

FAQ

What is the role of BUSY pins on the 7143LA90J8?

The BUSY pins (BUSYL and BUSYR) on the 7143LA90J8 function exclusively as inputs - unlike the IDT7133 MASTER's open-drain outputs. When asserted LOW, they inhibit write operations on the corresponding port during address contention. This design eliminates the need for external logic when implementing MASTER/SLAVE configurations, as the 7143LA90J8 relies entirely on the IDT7133's BUSY output for arbitration signaling.

Does the 7143LA90J8 support battery backup operation?

Yes, the 7143LA90J8 supports battery backup operation with guaranteed data retention down to 2V VCC. In this mode, the device draws only 100µA typical (ICCDR) while preserving memory contents - a key capability for fail-safe industrial controllers and telecom equipment that must retain configuration or state during main power loss.

How does the 7143LA90J8 differ from the IDT7133LA90J8?

The 7143LA90J8 is the SLAVE counterpart to the IDT7133LA90J8 MASTER. Key differences include: (1) absence of on-chip arbitration logic, (2) BUSY pins configured as inputs (not outputs), (3) no automatic priority resolution - it defers to the MASTER for contention handling. Both share identical timing (90ns), package (TQFP-100), and power specs (1050mW active, 1µA standby).

Can the 7143LA90J8 operate in standalone dual-port mode?

Yes, the 7143LA90J8 can operate as a standalone dual-port SRAM without a MASTER device. In this configuration, BUSY pins must be tied HIGH (via pull-up resistors) to disable write inhibition. All other functionality - independent port access, byte-select writes, and 2V retention - remains fully operational, making it suitable for simpler dual-CPU or CPU-peripheral sharing applications.

What is the significance of the 'LA' suffix in 7143LA90J8?

The 'LA' suffix in 7143LA90J8 denotes the Low-Power Advanced version of the IDT7143. It specifies reduced active power consumption (1050mW typ. vs. 1150mW for SA variants) and significantly lower standby current (1µA typ. vs. 5µA for SA), achieved through optimized CMOS process and circuit design. This makes the 7143LA90J8 ideal for thermally constrained or battery-powered industrial applications.

7143LA90J8 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:: 90ns

Access Time:: 90 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)

7143LA90J8 FAQ

1.How can I place an order for 7143LA90J8 through Aetrix?

Please submit a Request for Quotation (RFQ) for 7143LA90J8 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 7143LA90J8 reliable?

The price and inventory of 7143LA90J8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7143LA90J8 is usually 5 days.

3.What payment methods are accepted for 7143LA90J8?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7143LA90J8 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 7143LA90J8?

7143LA90J8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 7143LA90J8 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 7143LA90J8?

For technical support, including 7143LA90J8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7143LA90J8 requirements.

6.How does Aetrix verify that 7143LA90J8 is sourced from the original manufacturer or authorized distributors?

All 7143LA90J8 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 7143LA90J8 meets industry standards.

7.What is the process for return or replacement of 7143LA90J8?

All 7143LA90J8 units undergo pre-shipment inspection (PSI). If there is an issue with 7143LA90J8, 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 7143LA90J8 part is unused and in its original packaging.

Return procedure for 7143LA90J8:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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