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

Renesas 7143LA55G

Name: 7143LA55G
Brand: Renesas
SKU: 7143LA55G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 7143LA55G

Manufacturer:: Renesas

Category:: Memory

Package:: 68-BPGA

Datasheet:: 7143LA55G.pdf

Description:: IC SRAM 32KBIT PARALLEL 68PGA

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Product details

Overview

7143LA55G from IDT is a low-power, 2K × 16-bit (32 Kbit), dual-port static RAM with independent left/right asynchronous ports, 55 ns maximum read cycle time, TTL-compatible 5V ±10% operation, and battery backup data retention down to 2V - used in real-time embedded systems requiring concurrent CPU/DSP memory access without arbitration logic.

For engineers reviewing the 7143LA55G datasheet, 7143LA55G pinout, 7143LA55G application, or 7143LA55G equivalent, this page delivers verified timing specs, byte-select write control, BUSY input behavior, industrial temperature support (–40°C to +85°C), and master/slave expansion capability for 32-bit+ memory systems.

Technical Context

The 7143LA55G operates as a SLAVE dual-port SRAM in MASTER/SLAVE configurations: its BUSY pin functions exclusively as an input to accept arbitration signals from an IDT7133 MASTER, enabling seamless 32-bit-or-wider bus expansion without external logic. It supports fully asynchronous, independent read/write on both ports with separate upper/lower byte write enables (R/WLUB/R/WLLB and R/WRUB/R/WRLB).

No on-chip arbitration logic resides in the 7143LA55G - unlike the IDT7133 - making it strictly a slave device. Its low-power LA variant draws only 1 mW typical standby current and retains data at VCC = 2V, supporting battery-backed operation in mission-critical industrial controllers and avionics subsystems.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	2K × 16-bit (32 Kbit) - supports 16-bit parallel data paths per port with full addressability across A0–A10.
Access Time	55 ns max (tRC) - guarantees deterministic read latency for real-time DSP co-processing and FPGA interface applications.
Supply Voltage	5.0 V ±10% - compatible with legacy 5V TTL logic families without level-shifting circuitry.
Standby Current	1 mA typical (ISB3, CMOS-level inputs) - enables ultra-low-power sleep modes in battery-operated telemetry nodes.
Data Retention	2 V minimum VCC - preserves memory contents during brown-out or backup battery operation without refresh.
Operating Temp	–40°C to +85°C - qualified for industrial-grade deployment in motor drives, PLCs, and transportation electronics.
I/O Interface	TTL-compatible inputs/outputs - ensures direct interfacing with microcontrollers, FPGAs, and ASICs using standard 5V logic thresholds.

Pinout & Package

7143LA55G is packaged in a 68-pin PLCC (PLG68) with 2×34-pin staggered layout; requires connection of both VCC and GND pins for reliable operation per datasheet Note 1 & 2.

Pin/Terminal	Circuit Role	Design Meaning
CEL / CER	Chip Enable (Left / Right)	Active-low enable per port; controls port power-down state - high = standby, low = active.
R/WLUB / R/WRUB	Upper Byte Write Enable	Independent write control for I/O8–I/O15 on left/right port - enables byte-granular writes without masking logic.
R/WLLB / R/WRLB	Lower Byte Write Enable	Independent write control for I/O0–I/O7 on left/right port - critical for mixed-endian or partial-word updates.
OEL / OER	Output Enable	Tri-states I/O pins when high - allows shared bus operation and prevents contention during reads.
BUSYL / BUSYR	Busy Input (SLAVE)	Input-only BUSY signals - must be driven by IDT7133 MASTER to gate writes during address contention.
A0L–A10L / A0R–A10R	Address Inputs	11-bit address per port - decodes 2K locations; no internal address latching required.
I/O0L–I/O15L / I/O0R–I/O15R	Bi-directional Data	16-bit parallel I/O per port - supports simultaneous read/write across ports with no interlock delay.

Key Features

Feature	Design Value
Slave-only BUSY interface	Eliminates need for external arbitration logic when paired with IDT7133 MASTER - reduces BOM count and PCB area in width-expanded systems.
Byte-select write control	Separate upper/lower byte enables per port allow precise 8-bit updates without read-modify-write cycles - essential for protocol stack buffers.
2V data retention	Preserves memory contents during main power loss using backup battery - meets fail-safe requirements in industrial safety controllers.
Industrial temperature range	Validated operation from –40°C to +85°C - suitable for under-hood automotive ECUs and outdoor telecom equipment.
Low standby power	1 mA typical ISB3 current enables >1-year battery life in always-on monitoring devices with periodic wake-up intervals.

Applications

Real-Time DSP Co-Processor Memory	Redundant Control System Buffer
Use Scenario: Dual-core system where DSP core writes processed sensor data while host MCU reads results - both accessing same memory region concurrently. IC Role / Device Role / Timing Role: 7143LA55G serves as SLAVE in MASTER/SLAVE pair with IDT7133, accepting BUSY-driven write inhibition to prevent corruption during address collisions. Use Value: Enables deterministic, lock-free memory sharing with 55 ns access - eliminates software semaphores and reduces interrupt latency by >3 µs per transaction.	Use Scenario: Fault-tolerant PLC with primary and backup CPUs synchronizing status via shared memory, requiring guaranteed data integrity during switchover. IC Role / Device Role / Timing Role: 7143LA55G provides battery-backed 32 Kbit storage for critical state variables - retains values at 2V during AC power failure. Use Value: Ensures zero-data-loss handover between controllers; 1 mA standby current extends backup battery life to >72 hours.
Avionics Sensor Fusion Hub	FPGA-Based Video Frame Buffer
Use Scenario: Multi-sensor aircraft navigation unit fusing GPS, IMU, and barometer data in real time - requires concurrent read/write from multiple processing engines. IC Role / Device Role / Timing Role: 7143LA55G acts as SLAVE in 32-bit-wide memory bank (with IDT7133 MASTER), handling lower 16 bits of fused output vector. Use Value: Eliminates external glue logic for width expansion; -40°C to +85°C rating ensures reliability at cruise altitude temperatures.	Use Scenario: High-speed video capture system where FPGA writes raw frames while processor reads compressed output - overlapping access patterns. IC Role / Device Role / Timing Role: 7143LA55G supplies dedicated 16-bit port for FPGA-side frame writes, with byte-select enables optimizing bandwidth for YUV422 pixel packing. Use Value: 55 ns tRC enables ≥18 MB/s sustained write throughput; TTL compatibility avoids level-shifter components on dense FPGA carrier boards.

Real-Time DSP Co-Processor Memory

Redundant Control System Buffer

Use Scenario: Dual-core system where DSP core writes processed sensor data while host MCU reads results - both accessing same memory region concurrently.

IC Role / Device Role / Timing Role: 7143LA55G serves as SLAVE in MASTER/SLAVE pair with IDT7133, accepting BUSY-driven write inhibition to prevent corruption during address collisions.

Use Value: Enables deterministic, lock-free memory sharing with 55 ns access - eliminates software semaphores and reduces interrupt latency by >3 µs per transaction.

Use Scenario: Fault-tolerant PLC with primary and backup CPUs synchronizing status via shared memory, requiring guaranteed data integrity during switchover.

IC Role / Device Role / Timing Role: 7143LA55G provides battery-backed 32 Kbit storage for critical state variables - retains values at 2V during AC power failure.

Use Value: Ensures zero-data-loss handover between controllers; 1 mA standby current extends backup battery life to >72 hours.

Avionics Sensor Fusion Hub

FPGA-Based Video Frame Buffer

Use Scenario: Multi-sensor aircraft navigation unit fusing GPS, IMU, and barometer data in real time - requires concurrent read/write from multiple processing engines.

IC Role / Device Role / Timing Role: 7143LA55G acts as SLAVE in 32-bit-wide memory bank (with IDT7133 MASTER), handling lower 16 bits of fused output vector.

Use Value: Eliminates external glue logic for width expansion; -40°C to +85°C rating ensures reliability at cruise altitude temperatures.

Use Scenario: High-speed video capture system where FPGA writes raw frames while processor reads compressed output - overlapping access patterns.

IC Role / Device Role / Timing Role: 7143LA55G supplies dedicated 16-bit port for FPGA-side frame writes, with byte-select enables optimizing bandwidth for YUV422 pixel packing.

Use Value: 55 ns tRC enables ≥18 MB/s sustained write throughput; TTL compatibility avoids level-shifter components on dense FPGA carrier boards.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-port SRAM applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
CY7C1362BV33-55AXI	3.3V core, 55 ns, 2K × 16, QCC56 package - no BUSY arbitration, no 2V retention.	Requires level shifters for 5V systems; unsuitable for battery backup or MASTER/SLAVE expansion.	Select only for new 3.3V designs where arbitration is handled in FPGA logic.
IDT7133LA55G	Same family, MASTER variant - includes on-chip arbitration logic and open-drain BUSY output.	Enables standalone dual-port use or MASTER role in width expansion - cannot operate as SLAVE-only device.	Choose when single-chip arbitration is needed or when replacing IDT7133 in existing MASTER designs.

Compared with CY7C1362BV33-55AXI, the 7143LA55G offers native 5V operation and hardware BUSY-based arbitration; compared with IDT7133LA55G, it removes arbitration logic to reduce power and cost in SLAVE-only roles - ideal for scalable multi-chip memory banks.

Availability

7143LA55G is available at Aetrix Electronics and suitable for industrial automation, avionics subsystems, and real-time DSP co-processor memory requiring stable component supply, long-term lifecycle support, and MIL-PRF-38535-compliant manufacturing traceability.

Supply support for 7143LA55G 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 signal conditioning ICs, now part of Renesas Electronics.

The IDT7133/7143 family was designed specifically for high-reliability, concurrent-access memory applications in military, industrial, and telecommunications systems - emphasizing hardware arbitration, low-power retention, and seamless bus width scalability.

FAQ

What is the function of the BUSY pins on the 7143LA55G?

The BUSYL and BUSYR pins on the 7143LA55G are inputs only - unlike the IDT7133 MASTER, this SLAVE device uses them to receive arbitration signals. When asserted low by an IDT7133 MASTER, they inhibit writes to the corresponding port, preventing data corruption during address contention. Pull-up resistors are not required, as these are true inputs.

Can the 7143LA55G operate as a standalone dual-port RAM without an IDT7133 MASTER?

Yes, the 7143LA55G can operate standalone - but without hardware arbitration, concurrent writes to the same address from both ports will cause undefined data. For deterministic operation in shared-memory systems, pairing with an IDT7133 MASTER is recommended. The 7143LA55G itself contains no arbitration logic.

Does the 7143LA55G support battery backup, and what voltage threshold maintains data retention?

Yes, the 7143LA55G supports battery backup with guaranteed data retention at VCC ≥ 2.0 V (per Table 8). At this voltage, typical data retention current is 100 µA, enabling multi-day hold-up with small coin-cell batteries - a key feature distinguishing the LA variant from SA versions.

What is the difference between the 7143LA55G and 7143SA55G?

The 7143LA55G is the low-power variant: it consumes 1 mW typical standby current vs. 5 mW for the 7143SA55G, and supports 2V data retention - the SA version does not. Both share identical timing (55 ns), pinout, and functionality, but only the LA version is rated for industrial temperature and battery backup operation.

Which packages are available for the 7143LA55G, and is the PLCC RoHS-compliant?

The 7143LA55G is offered in 68-pin PLCC (PLG68), 68-pin ceramic PGA, 68-pin flatpack, and 100-pin TQFP. Per IDT documentation, green (RoHS-compliant) versions are available - ordering code suffix "G" (as in 7143LA55G) explicitly denotes lead-free, halogen-free packaging meeting JEDEC J-STD-020 standards.

7143LA55G 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:: 55ns

Access Time:: 55 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)

7143LA55G FAQ

1.How can I place an order for 7143LA55G through Aetrix?

Please submit a Request for Quotation (RFQ) for 7143LA55G 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 7143LA55G reliable?

The price and inventory of 7143LA55G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7143LA55G is usually 5 days.

3.What payment methods are accepted for 7143LA55G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7143LA55G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 7143LA55G?

7143LA55G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 7143LA55G 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 7143LA55G?

For technical support, including 7143LA55G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7143LA55G requirements.

6.How does Aetrix verify that 7143LA55G is sourced from the original manufacturer or authorized distributors?

All 7143LA55G 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 7143LA55G meets industry standards.

7.What is the process for return or replacement of 7143LA55G?

All 7143LA55G units undergo pre-shipment inspection (PSI). If there is an issue with 7143LA55G, 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 7143LA55G part is unused and in its original packaging.

Return procedure for 7143LA55G:

1.Submit a request within 90 days.

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

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