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

Renesas 7143SA35J

Name: 7143SA35J
Brand: Renesas
SKU: 7143SA35J
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 7143SA35J

Manufacturer:: Renesas

Category:: Memory

Package:: 68-LCC (J-Lead)

Datasheet:: 7143SA35J.pdf

Description:: IC SRAM 32KBIT PARALLEL 68PLCC

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Product details

Overview

7143SA35J 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 memory systems without external logic.

For engineers reviewing the 7143SA35J datasheet, 7143SA35J pinout, 7143SA35J application, or 7143SA35J equivalent, this page delivers verified timing parameters, BUSY input behavior, byte-select write control, power consumption data, and validated alternatives for dual-port SRAM system design.

Technical Context

The 7143SA35J operates as a SLAVE dual-port SRAM with BUSY pin functioning exclusively as an input-unlike the MASTER IDT7133-which allows it to receive arbitration signals from a MASTER device and inhibit writes during contention. It supports fully asynchronous access on both ports with separate address, control, and I/O lines.

It implements independent upper/lower byte write enable (R/WLUB/R/WLLB and R/WRUB/R/WRLB), output enable per port (OEL/OER), and chip enable per port (CEL/CER). Its low-power SA variant draws 240 mA typical dynamic current and 25 mA typical standby current under industrial conditions at 35 ns speed grade.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	2K × 16 bits (32,768 bits total), organized as two independent 2K-word × 16-bit ports
Max Read Cycle Time	35 ns - defines minimum time between successive reads on same port
Operating Voltage	5.0 V ±10% - single-supply TTL-compatible interface requiring no level shifters
Temperature Range	–40°C to +85°C - qualified for industrial applications with guaranteed timing across range
Dynamic Current (Typ)	240 mA - measured at fMAX with both ports active, critical for thermal and PSU sizing
Standby Current (Typ)	25 mA - with both CEL and CER high, enabling low-power idle states in multi-port systems
BUSY Function	Input-only - used to gate internal write operations when asserted by MASTER device

Pinout & Package

7143SA35J is packaged in a 68-pin PLCC (PLG68) with 0.95″ × 0.95″ footprint. Both VCC pins must be connected to 5V supply and both GND pins to ground for reliable operation.

Pin/Terminal	Circuit Role	Design Meaning
CEL / CER	Chip Enable (Left / Right)	Active-low per-port enable controlling power-down and memory access
R/WLUB / R/WRUB	Upper Byte Write Enable (L/R)	Independent write control for I/O8–I/O15 on each port
R/WLLB / R/WRLB	Lower Byte Write Enable (L/R)	Independent write control for I/O0–I/O7 on each port
OEL / OER	Output Enable (L/R)	Controls tri-state of I/O drivers; does not affect write path
A0L–A10L / A0R–A10R	Address Inputs (L/R)	11-bit address bus per port selecting one of 2K locations
I/O0L–I/O15L / I/O0R–I/O15R	Data I/O (L/R)	16-bit bidirectional data bus per port; electrically isolated between ports
BUSYL / BUSYR	BUSY Input (L/R)	SLAVE-only function: asserts write inhibition when driven LOW by MASTER
VCC (×2)	Power Supply	Both pins must be connected to 5V ±10%; failure causes functional instability
GND (×2)	Ground	Both pins must be connected to system ground; ensures signal integrity and timing margin

Key Features

Feature	Design Value
SLAVE-only BUSY input	Eliminates need for external arbitration logic when paired with IDT7133 MASTER, reducing BOM count and layout complexity
Separate byte write enables	Enables partial-word writes (upper/lower 8-bit bytes) without read-modify-write cycles, improving system throughput
Asynchronous dual-port operation	Permits concurrent read/write on left and right ports-no clock required-ideal for CPU-to-peripheral or DSP-to-FPGA interfaces
Industrial temperature qualification	Guaranteed 35 ns timing performance from –40°C to +85°C, suitable for embedded control and avionics subsystems
Low-power SA variant	240 mA typical active current and 25 mA standby current enable thermally constrained designs without forced cooling

Applications

Real-Time Data Buffering	DSP-to-Peripheral Interface
Use Scenario: Bidirectional streaming of sensor data between microcontroller and FPGA with zero-latency handshaking. IC Role / Device Role / Timing Role: SLAVE dual-port RAM provides non-blocking memory conduit where MCU writes to left port while FPGA reads from right port. Use Value: Eliminates software-managed semaphores; hardware BUSY input prevents data corruption during simultaneous access to same address.	Use Scenario: High-throughput audio sample exchange between TI C6000 DSP and ADC/DAC peripherals. IC Role / Device Role / Timing Role: Acts as 32-bit-wide memory bridge using MASTER/SLAVE pairing to avoid "busy lock-out" in multi-chip configurations. Use Value: Enables full-speed 35 ns transfers across both ports without external arbitration gates or timing-critical glue logic.
Industrial PLC Memory Expansion	Military Avionics Bus Interface
Use Scenario: Extending local memory capacity in programmable logic controllers handling deterministic I/O scanning. IC Role / Device Role / Timing Role: SLAVE device synchronized to MASTER IDT7133 to scale data bus width beyond 16 bits while preserving cycle timing. Use Value: Achieves 32-bit word access with identical 35 ns latency as single-port operation-no performance penalty for width scaling.	Use Scenario: Secure, radiation-tolerant memory buffer between flight computer and mission-critical sensor subsystems. IC Role / Device Role / Timing Role: Industrial-grade 7143SA35J deployed in MIL-qualified systems leveraging its –40°C to +85°C operation and robust BUSY arbitration. Use Value: Guarantees deterministic response to contention events via hardware BUSY gating-critical for DO-254 safety-critical designs.

Real-Time Data Buffering

DSP-to-Peripheral Interface

Use Scenario: Bidirectional streaming of sensor data between microcontroller and FPGA with zero-latency handshaking.

IC Role / Device Role / Timing Role: SLAVE dual-port RAM provides non-blocking memory conduit where MCU writes to left port while FPGA reads from right port.

Use Value: Eliminates software-managed semaphores; hardware BUSY input prevents data corruption during simultaneous access to same address.

Use Scenario: High-throughput audio sample exchange between TI C6000 DSP and ADC/DAC peripherals.

IC Role / Device Role / Timing Role: Acts as 32-bit-wide memory bridge using MASTER/SLAVE pairing to avoid "busy lock-out" in multi-chip configurations.

Use Value: Enables full-speed 35 ns transfers across both ports without external arbitration gates or timing-critical glue logic.

Industrial PLC Memory Expansion

Military Avionics Bus Interface

Use Scenario: Extending local memory capacity in programmable logic controllers handling deterministic I/O scanning.

IC Role / Device Role / Timing Role: SLAVE device synchronized to MASTER IDT7133 to scale data bus width beyond 16 bits while preserving cycle timing.

Use Value: Achieves 32-bit word access with identical 35 ns latency as single-port operation-no performance penalty for width scaling.

Use Scenario: Secure, radiation-tolerant memory buffer between flight computer and mission-critical sensor subsystems.

IC Role / Device Role / Timing Role: Industrial-grade 7143SA35J deployed in MIL-qualified systems leveraging its –40°C to +85°C operation and robust BUSY arbitration.

Use Value: Guarantees deterministic response to contention events via hardware BUSY gating-critical for DO-254 safety-critical designs.

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 CY7C1371DV33-35AXI	3.3V core, LVCMOS interface; 35 ns access, 2K × 18 organization; no native BUSY arbitration logic	Requires external logic for MASTER/SLAVE arbitration; incompatible voltage domain with 5V TTL systems	Select only if migrating to 3.3V infrastructure and redesigning level-shifting and arbitration circuitry
IDT7133SA35J	MASTER counterpart: includes on-chip arbitration logic and open-drain BUSY output; identical pinout and timing	Used as primary controller in MASTER/SLAVE pairs; cannot operate standalone as SLAVE without companion 7143	Required when building scalable dual-port memory arrays-must be paired with 7143SA35J for width expansion

Compared with CY7C1371DV33-35AXI, 7143SA35J offers native 5V TTL compatibility and hardware BUSY input for seamless arbitration, eliminating external gates. Against IDT7133SA35J, it serves strictly as SLAVE-reducing cost and complexity where only subordinate memory expansion is needed.

Availability

7143SA35J is available at Aetrix Electronics and suitable for real-time data buffering, DSP-to-peripheral interfacing, industrial PLC memory expansion, and military avionics bus interface applications requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.

Supply support for 7143SA35J 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 high-performance silicon solutions, now part of Renesas Electronics.

The IDT7133/7143 family was designed for high-reliability dual-port memory applications in industrial control, telecommunications infrastructure, and defense systems requiring deterministic arbitration and wide-bus expansion.

FAQ

What is the role of BUSY pins on the 7143SA35J?

The BUSY pins (BUSYL and BUSYR) on the 7143SA35J function exclusively as inputs-unlike the MASTER IDT7133-allowing external arbitration signals to gate write operations. When asserted LOW by a MASTER device, they prevent writes to the corresponding port, ensuring data coherency during address contention. This eliminates need for external logic in width-expanded systems.

Can the 7143SA35J operate as a standalone dual-port RAM without a MASTER device?

Yes, the 7143SA35J can operate independently as a dual-port SRAM with full asynchronous read/write capability on both ports. However, its BUSY pins serve only as write-inhibit inputs-if unused, tie them HIGH to enable normal operation. No MASTER device is required unless BUSY-based arbitration or width expansion is needed.

What package options are available for the 7143SA35J?

The 7143SA35J is offered in 68-pin PLCC (PLG68), 68-pin ceramic PGA (GU68), 68-pin flatpack (FP68), and 100-pin TQFP (PNG100). The PLCC variant is most common for industrial applications due to its robustness and reworkability; all packages share identical pinouts and electrical specifications.

How does the 7143SA35J differ from the 7133SA35J in system design?

The 7143SA35J is the SLAVE device: it accepts BUSY as input and lacks on-chip arbitration logic. The 7133SA35J is the MASTER: it generates BUSY as an open-drain output and contains arbitration logic. In width-expanded systems, one 7133SA35J controls multiple 7143SA35J devices-ensuring deterministic resolution of port contention without "busy lock-out."

Is battery backup supported on the 7143SA35J?

No-battery backup data retention is exclusive to the LA (low-power) variants (e.g., 7143LA35J), which specify 2V data retention and sub-200 µW standby per port. The 7143SA35J is the standard-power variant and does not guarantee data retention below 4.5V; it requires continuous 5V ±10% supply for operation.

7143SA35J 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:: 35ns

Access Time:: 35 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)

7143SA35J FAQ

1.How can I place an order for 7143SA35J through Aetrix?

Please submit a Request for Quotation (RFQ) for 7143SA35J 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 7143SA35J reliable?

The price and inventory of 7143SA35J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7143SA35J is usually 5 days.

3.What payment methods are accepted for 7143SA35J?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7143SA35J transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 7143SA35J?

7143SA35J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 7143SA35J 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 7143SA35J?

For technical support, including 7143SA35J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7143SA35J requirements.

6.How does Aetrix verify that 7143SA35J is sourced from the original manufacturer or authorized distributors?

All 7143SA35J 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 7143SA35J meets industry standards.

7.What is the process for return or replacement of 7143SA35J?

All 7143SA35J units undergo pre-shipment inspection (PSI). If there is an issue with 7143SA35J, 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 7143SA35J part is unused and in its original packaging.

Return procedure for 7143SA35J:

1.Submit a request within 90 days.

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

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