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Renesas 7143LA20PF
- Part No.:
- 7143LA20PF
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
7143LA20PF.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,913
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Product details
Overview
7143LA20PF 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 20 ns read cycle time (commercial grade), 5 V ±10% supply, and 1 µA typical standby current. It enables error-free 32-bit-or-wider memory systems without external logic in industrial control and real-time DSP applications.
For engineers reviewing the 7143LA20PF datasheet, 7143LA20PF pinout, 7143LA20PF application, or 7143LA20PF equivalent, key selection considerations include BUSY input behavior (not output), LA low-power profile, 68-pin PLCC package compatibility, and precise timing alignment with IDT7133 MASTER devices for contention resolution.
Technical Context
The 7143LA20PF operates as a SLAVE dual-port SRAM with dedicated BUSY input pins (BUSYL, BUSYR) that gate write operations during port-to-port address contention-unlike the MASTER IDT7133 which drives BUSY outputs. Its arbitration logic is disabled; BUSY signals are purely input-controlled.
It supports fully asynchronous dual-port operation with separate byte-level write enables (R/WLUB/R/WLLB and R/WRUB/R/WRLB), TTL-compatible I/O, and battery backup data retention at 2 V. The device requires no external arbitration components when paired with an IDT7133 MASTER in width-expanded configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 16 bits = 4,096 words × 16-bit wide; sufficient for real-time buffer storage in dual-CPU systems. |
| Read Cycle Time | 20 ns max (commercial); defines minimum interval between successive reads on same port. |
| Standby Current | 1 µA typical (ISB3, CMOS-level CE); enables ultra-low-power hold mode during CPU idle periods. |
| Supply Voltage | 5.0 V ±10% (4.5–5.5 V); compatible with legacy 5 V TTL logic families without level shifting. |
| Data Retention | 2 V minimum VCC; preserves memory contents during brown-out or backup battery operation. |
| Operating Temp | –40°C to +85°C (industrial grade); validated for embedded control in harsh environments. |
| Package | 68-pin PLCC (PLG68); surface-mountable with 0.95″ × 0.95″ footprint and standard reflow profile. |
Pinout & Package
68-pin Plastic Leaded Chip Carrier (PLCC, PLG68) package with dual-row J-lead configuration. Requires both VCC (pins 17 & 51) and GND (pins 26 & 62) connections for reliable operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Active-low enable per port; controls power-down mode and memory access permission independently. |
| R/WLUB / R/WRUB | Upper Byte Write Enable | Asserts write to I/O8–I/O15 on respective port; enables byte-selective writes without disturbing lower byte. |
| R/WLLB / R/WRLB | Lower Byte Write Enable | Asserts write to I/O0–I/O7 on respective port; supports 8-bit sub-word updates in mixed-width systems. |
| OEL / OER | Output Enable (Left / Right) | Controls tri-state of I/O drivers; allows shared bus operation without external bus transceivers. |
| BUSYL / BUSYR | Busy Input (SLAVE only) | External BUSY signal from MASTER device; gates internal write cycles during contention-no pull-up required. |
| A0L–A10L / A0R–A10R | Address Inputs | 11-bit address per port (211 = 2K); supports independent addressing for concurrent access to same or different locations. |
| I/O0L–I/O15L / I/O0R–I/O15R | Data I/O (16-bit bidirectional) | Fully independent 16-bit data paths; eliminates inter-port data collision during simultaneous read/write. |
Key Features
| Feature | Design Value |
|---|---|
| SLAVE-only BUSY interface | Eliminates need for external arbitration logic when paired with IDT7133 MASTER; BUSY pins function solely as write-inhibit inputs. |
| Byte-selectable write control | Independent upper/lower byte enables per port allow partial-word writes-critical for efficient protocol stack buffering. |
| 2 V data retention | Preserves stored values during main power loss using backup battery; verified at 100 µA typical retention current. |
| Low-power LA variant | 1 µA full-standby current (ISB3) reduces system-level power budget by >90% vs. SA versions in idle states. |
| 68-pin PLCC packaging | Industry-standard footprint enables drop-in replacement and compatibility with existing PCB layouts for dual-port memory upgrades. |
Applications
| Industrial Motion Controller | DSP-Based Radar Signal Processor |
|---|---|
Use Scenario: Dual-CPU architecture where one processor handles motion trajectory planning while the other executes real-time servo loop updates. IC Role / Device Role / Timing Role: SLAVE dual-port RAM provides shared instruction/data buffer with hardware-enforced write collision avoidance via BUSY input from MASTER. Use Value: Enables deterministic 20 ns memory access latency across CPUs without software arbitration overhead or pipeline stalls. | Use Scenario: High-throughput radar front-end processing requiring simultaneous ADC sample ingestion and FFT coefficient lookup. IC Role / Device Role / Timing Role: Acts as synchronized ping-pong buffer between ADC DMA engine (right port) and DSP core (left port) with byte-granular write control. Use Value: 16-bit parallel I/O and independent port timing eliminate bottlenecks in 100+ MSPS real-time signal flow. |
| Avionics Display Management Unit | Redundant PLC Logic Solver |
Use Scenario: Safety-critical cockpit display system with primary and backup graphics processors sharing frame buffer memory. IC Role / Device Role / Timing Role: SLAVE device receives BUSY arbitration signal from MASTER to prevent conflicting pixel writes during failover transitions. Use Value: Guarantees atomic frame buffer updates and eliminates visual corruption during redundancy switchover. | Use Scenario: Dual-channel programmable logic controller executing identical ladder logic on redundant CPUs with cross-checked outputs. IC Role / Device Role / Timing Role: Shared memory resource for synchronized state variable exchange, with BUSY-driven write inhibition ensuring consistent state snapshots. Use Value: Achieves SIL-3 compliance by eliminating race conditions in safety-critical state synchronization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT7143LA25PF | 25 ns read cycle (vs. 20 ns); otherwise identical pinout, timing structure, and SLAVE functionality. | Suitable for cost-sensitive industrial designs where 5 ns latency margin is acceptable. | Select when system timing budget allows relaxed access time and lower unit cost is prioritized. |
| CY7C1372D-20ZXI | 20 ns access but uses 100-pin TQFP; includes on-chip arbitration logic (MASTER/SLAVE configurable); 3.3 V supply only. | Requires PCB redesign and level-shifting; suited for new 3.3 V designs needing flexible arbitration topology. | Choose only for greenfield 3.3 V systems where footprint change and voltage migration are acceptable. |
Compared with IDT7143LA25PF and CY7C1372D-20ZXI, the 7143LA20PF delivers the fastest commercial-grade access within its 68-pin PLCC footprint and maintains strict backward compatibility with legacy IDT7133-based MASTER/SLAVE systems-making it optimal for performance-critical upgrades without layout changes.
Availability
7143LA20PF is available at Aetrix Electronics and suitable for industrial motion control, avionics display management, and redundant PLC logic solver applications requiring stable component supply and long-term lifecycle support.
Supply support for 7143LA20PF 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 timing, memory interface, RF, and sensor solutions, now part of Renesas Electronics.
The IDT7143 product line delivers SLAVE-configured dual-port SRAMs designed specifically for width-expansion architectures with IDT7133 MASTER devices-enabling scalable, contention-free memory systems in real-time embedded applications.
FAQ
What is the role of BUSY pins on the 7143LA20PF?
The BUSY pins (BUSYL and BUSYR) on the 7143LA20PF function exclusively as inputs-not outputs-because it is a SLAVE device. They receive BUSY signals from a MASTER IDT7133 to inhibit write operations during port-to-port address contention. Unlike the MASTER, no pull-up resistors are needed, and these pins must be driven externally to ensure deterministic arbitration in width-expanded systems.
Can the 7143LA20PF operate standalone without an IDT7133 MASTER?
Yes, the 7143LA20PF can operate as a standalone 2K × 16 dual-port SRAM. Its BUSY pins default to inactive (high-impedance or pulled high) and do not affect normal read/write functionality. However, hardware arbitration for simultaneous access to the same address is disabled-software or external logic must manage contention if used alone.
What is the significance of "LA" in 7143LA20PF?
The "LA" suffix denotes the Low-Power version of the IDT7143, characterized by 1 µA typical full-standby current (ISB3) and 2 V data retention capability. This distinguishes it from the "SA" (Standard Active) variant, which draws ~5 µA standby current and lacks guaranteed 2 V retention-making the LA variant essential for battery-backed or energy-constrained applications.
Which package does 7143LA20PF use, and is it RoHS-compliant?
The 7143LA20PF uses a 68-pin Plastic Leaded Chip Carrier (PLCC) package, designated PLG68. Per IDT's ordering information and green parts documentation, this variant is RoHS-compliant and lead-free, meeting JEDEC J-STD-020 moisture sensitivity level 3 requirements for standard reflow assembly.
How does the 7143LA20PF handle simultaneous writes to the same address from both ports?
The 7143LA20PF itself does not resolve simultaneous writes-it relies on an external MASTER IDT7133 to assert BUSY and gate one port's write. When used standalone, simultaneous writes to the same location result in undefined data; system-level design must prevent such collisions via software coordination or external arbitration logic.
7143LA20PF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 100-LQFP
- 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:
- 20ns
- Access Time:
- 20 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-TQFP (14x14)
7143LA20PF FAQ
1.How can I place an order for 7143LA20PF through Aetrix?
Please submit a Request for Quotation (RFQ) for 7143LA20PF 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 7143LA20PF reliable?
The price and inventory of 7143LA20PF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7143LA20PF is usually 5 days.
3.What payment methods are accepted for 7143LA20PF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7143LA20PF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7143LA20PF?
7143LA20PF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7143LA20PF 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 7143LA20PF?
For technical support, including 7143LA20PF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7143LA20PF requirements.
6.How does Aetrix verify that 7143LA20PF is sourced from the original manufacturer or authorized distributors?
All 7143LA20PF 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 7143LA20PF meets industry standards.
7.What is the process for return or replacement of 7143LA20PF?
All 7143LA20PF units undergo pre-shipment inspection (PSI). If there is an issue with 7143LA20PF, 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 7143LA20PF part is unused and in its original packaging.
Return procedure for 7143LA20PF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7143LA20PF Tags
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