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Renesas 7143LA35G
- Part No.:
- 7143LA35G
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-BPGA
- Datasheet:
-
7143LA35G.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 68PGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,074
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Product details
Overview
7143LA35G from IDT (Integrated Device Technology) 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 35 ns maximum read cycle time, 2V data retention capability, and TTL-compatible 5V ±10% operation - used in real-time digital signal processors, military avionics bus controllers, and industrial motion control I/O modules.
For engineers reviewing the 7143LA35G datasheet, 7143LA35G pinout, 7143LA35G application, or 7143LA35G equivalent, this page delivers verified timing parameters, BUSY-input arbitration behavior, low-power standby current (1 µA typ.), battery backup support, and exact package mapping for 68-pin PLCC, PGA, and flatpack variants - critical for deterministic dual-ported memory coherency in safety-critical embedded systems.
Technical Context
The 7143LA35G implements fully asynchronous dual-port architecture with separate address, control, and bidirectional I/O buses per port. Its BUSY pin functions exclusively as an input (unlike the MASTER 7133), enabling write-inhibit arbitration when driven by a 7133's open-drain BUSY output - eliminating external logic in 32-bit+ width expansions.
It supports byte-level write control (R/WLUB/R/WLLB and R/WRUB/R/WRLB), independent chip enable (CEL/CER), and output enable (OEL/OER) per port. The LA variant delivers 1050 mW typical active power and 1 µA typical standby current at 5V, with guaranteed 2V data retention during battery backup mode.
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 |
| Access Time (tRC) | 35 ns max - defines minimum read cycle interval; enables synchronization with 28.6 MHz CPU buses |
| Supply Voltage | 5.0 V ±10% - single-rail TTL-compatible operation; no level-shifting required in legacy 5V systems |
| Standby Current | 1 µA typical - enables ultra-low-power battery backup retention without external regulators |
| Data Retention | 2 V minimum VCC - preserves memory contents during main power loss using coin-cell backup |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including factory automation and railway signaling |
| Package Options | 68-pin PLCC, ceramic PGA, flatpack, and 100-pin TQFP - supports legacy socketed designs and surface-mount reflow |
Pinout & Package
7143LA35G is available in 68-pin PLCC (PLG68), 68-pin ceramic PGA (GU68), 68-pin flatpack (FP68), and 100-pin TQFP (PNG100). This entry covers the standard 68-pin PLCC configuration per datasheet drawing 2746 drw 02.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A10L | Left Port Address Inputs | 11-bit address bus for left port (2K = 211 locations); must be stable before CE or OE assertion |
| A0R–A10R | Right Port Address Inputs | Independent 11-bit address bus for right port; enables true concurrent access to same or different addresses |
| I/O0L–I/O15L | Left Port Bidirectional Data | 16-bit data bus; direction controlled by R/WLUB/R/WLLB and OEL; high-impedance when disabled |
| I/O0R–I/O15R | Right Port Bidirectional Data | 16-bit data bus with identical control logic; electrically isolated from left port I/O |
| CEL / CER | Chip Enable (Active Low) | Port-select enable; drives port into low-power standby when HIGH; controls internal power-down circuitry |
| R/WLUB / R/WRUB | Upper Byte Write Enable | Controls write enable for I/O8–I/O15 on respective port; allows byte-selective writes without masking logic |
| R/WLLB / R/WRLB | Lower Byte Write Enable | Controls write enable for I/O0–I/O7 on respective port; enables 8-bit granularity for partial-word updates |
| OEL / OER | Output Enable (Active Low) | Enables tristate output drivers; overrides R/W state - critical for read-modify-write sequences |
| BUSYL / BUSYR | Busy Input (SLAVE only) | Asynchronous write-inhibit inputs; must be driven HIGH for normal operation or LOW to block writes permanently |
| VCC (×2) | Power Supply | Both pins must be connected to 5V ±10%; failure causes undefined operation or data corruption |
| GND (×2) | Ground Reference | Both pins must be connected to system ground; ensures signal integrity and noise immunity across both ports |
Key Features
| Feature | Design Value |
|---|---|
| SLAVE-only BUSY input interface | Eliminates need for external arbitration logic when paired with 7133 MASTER; reduces BOM count and PCB area |
| Byte-selectable write control | Independent upper/lower byte enables per port allow efficient 8-bit peripheral interfacing without software masking |
| 2V data retention mode | Preserves full memory contents during main power failure using low-current backup supply - validated per MIL-PRF-38535 |
| Ultra-low standby current (1 µA) | Reduces system-level power budget in always-on industrial controllers; extends battery life in portable test equipment |
| Full asynchronous dual-port operation | Enables deterministic latency for real-time DSP tasks where left port handles ADC streaming while right port services CPU DMA |
Applications
| Industrial Motion Control | Military Avionics Bus Interface |
|---|---|
Use Scenario: Real-time servo loop coordination between FPGA-based position controller and microcontroller-based safety monitor. IC Role / Device Role / Timing Role: SLAVE dual-port RAM buffers position setpoints and feedback data; BUSY input prevents conflicting writes during fault recovery. Use Value: Enables lock-step execution without software arbitration overhead; 35 ns access ensures sub-µs response in 10 kHz control loops. |
Use Scenario: ARINC 429 bus controller sharing telemetry data between flight management computer (FMC) and display processing unit (DPU). IC Role / Device Role / Timing Role: 7143LA35G acts as SLAVE in MASTER/SLAVE pair; FMC writes via left port, DPU reads via right port with hardware-enforced coherency. Use Value: Eliminates race conditions during simultaneous frame transmission/reception; -40°C to +85°C rating meets DO-160E environmental requirements. |
| Digital Signal Processor Co-Processor | Telecom Line Card Buffering |
Use Scenario: Offloading FFT computation from host processor to dedicated DSP core with shared coefficient and result memory. IC Role / Device Role / Timing Role: Dual-port RAM serves as zero-wait-state scratchpad; left port connects to DSP EMIF, right port to ARM AHB bus. Use Value: 2K × 16 capacity provides sufficient space for 1024-point complex FFT twiddle tables; 1 µA standby enables deep-sleep modes between bursts. |
Use Scenario: TDM voice channel aggregation in carrier-grade access concentrators requiring jitter-free buffering across multiple E1/T1 links. IC Role / Device Role / Timing Role: SLAVE device synchronizes write bursts from line interface ICs and read requests from packet processor - coordinated by 7133 MASTER. Use Value: Hardware BUSY arbitration prevents buffer overwrites during peak traffic; 68-pin PLCC supports through-hole mounting for high-reliability backplane cards. |
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 CY7C1371DV33-166AXC | 3.3V core, 166 MHz QDR interface, 18 Mb density - not pin-compatible; requires level shifters and layout redesign | Targeted at high-throughput networking ASIC interfaces, not legacy 5V industrial CPUs | Select only if migrating to 3.3V architecture and requiring >10× bandwidth; incompatible with 7143LA35G socket or timing model |
| IDT7133LA35G | MASTER variant with open-drain BUSY output, on-chip arbitration logic, and identical timing/package - pin-compatible but functionally distinct | Used where local arbitration is required without external master; cannot substitute directly as SLAVE | Choose only when implementing standalone dual-port or MASTER role; requires redesign of BUSY routing and arbitration topology |
Compared with CY7C1371DV33-166AXC and IDT7133LA35G, the 7143LA35G uniquely provides SLAVE-specific BUSY input behavior, 5V TTL compatibility, and 2V data retention - making it irreplaceable in existing 7133/7143 width-expansion systems requiring deterministic, low-power, drop-in SLAVE replacement.
Availability
7143LA35G is available at Aetrix Electronics and suitable for industrial motion control, military avionics bus interfaces, and telecom line card buffering requiring stable component supply across extended product lifecycles and temperature ranges.
Supply support for 7143LA35G 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) was a fabless semiconductor company specializing in high-performance timing, memory, and interface solutions, acquired by Renesas Electronics in 2019.
The 7143LA35G belongs to IDT's legacy dual-port SRAM product line, designed specifically for deterministic, contention-free memory sharing between heterogeneous processors in aerospace, defense, and industrial real-time systems.
FAQ
What is the key functional difference between 7143LA35G and 7133LA35G?
The 7143LA35G is a SLAVE-only dual-port SRAM with BUSY pins functioning strictly as inputs for write-inhibit arbitration, while the 7133LA35G is a MASTER device featuring on-chip arbitration logic and open-drain BUSY outputs. They share identical pinouts and timing but differ fundamentally in arbitration role - 7143LA35G cannot operate standalone as a MASTER and requires pairing with a 7133LA35G or compatible MASTER for BUSY-controlled width expansion.
Does 7143LA35G support battery backup operation, and what voltage is required?
Yes, the 7143LA35G supports battery backup data retention at VCC = 2.0 V minimum, as specified in datasheet Table 2746 tbl 08. During backup mode, it draws ≤4000 µA (military grade) or ≤1500 µA (commercial) while preserving all 32,768 bits - enabling seamless failover in systems like avionics flight recorders or industrial PLCs with nonvolatile memory requirements.
What package types are available for 7143LA35G, and which is most commonly used in industrial designs?
The 7143LA35G is offered in 68-pin PLCC (PLG68), 68-pin ceramic PGA (GU68), 68-pin flatpack (FP68), and 100-pin TQFP (PNG100). The 68-pin PLCC is most common in industrial designs due to its robustness, socket compatibility for prototyping and field upgrades, and proven reliability in vibration-prone environments such as factory automation and rail signaling equipment.
Can 7143LA35G be used without a MASTER device like 7133LA35G?
Yes - the 7143LA35G operates as a fully functional dual-port SRAM without a MASTER. Its BUSY pins default to inactive (HIGH) and can be tied high for normal operation. BUSY arbitration is optional: tie BUSYL/BUSYR HIGH for standard dual-port use, or drive them externally to implement custom write-inhibit schemes. Only MASTER/SLAVE expansion requires pairing with a 7133LA35G.
What is the standby current specification for 7143LA35G, and how is it measured?
The 7143LA35G exhibits 1 µA typical standby current (ISB3, both ports in full CMOS standby) at VCC = 5.0 V and TA = +25°C, per datasheet Table 2746 tbl 07a. This is measured with both CEL and CER held > VCC − 0.2 V (i.e., logic HIGH), all address/data lines at valid CMOS levels, and f = 0 - representing the lowest possible quiescent draw for battery-backed retention scenarios.
7143LA35G 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:
- 35ns
- Access Time:
- 35 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)
7143LA35G FAQ
1.How can I place an order for 7143LA35G through Aetrix?
Please submit a Request for Quotation (RFQ) for 7143LA35G 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 7143LA35G reliable?
The price and inventory of 7143LA35G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7143LA35G is usually 5 days.
3.What payment methods are accepted for 7143LA35G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7143LA35G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7143LA35G?
7143LA35G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7143LA35G 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 7143LA35G?
For technical support, including 7143LA35G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7143LA35G requirements.
6.How does Aetrix verify that 7143LA35G is sourced from the original manufacturer or authorized distributors?
All 7143LA35G 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 7143LA35G meets industry standards.
7.What is the process for return or replacement of 7143LA35G?
All 7143LA35G units undergo pre-shipment inspection (PSI). If there is an issue with 7143LA35G, 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 7143LA35G part is unused and in its original packaging.
Return procedure for 7143LA35G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7143LA35G Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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AT24C08C-STUM-T
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