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Renesas 7143SA55GB
- Part No.:
- 7143SA55GB
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-BPGA
- Datasheet:
-
7143SA55GB.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 68PGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,558
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Product details
Overview
7143SA55GB from IDT is a high-speed 2K × 16 dual-port static RAM configured as a SLAVE device in MASTER/SLAVE memory expansion systems, supporting 55 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 word-width systems without external logic.
For engineers reviewing the 7143SA55GB datasheet, 7143SA55GB pinout, 7143SA55GB application, or 7143SA55GB equivalent, key selection criteria include BUSY input behavior (not output), byte-level write control per port, 2K × 16 asynchronous dual-access architecture, and compatibility with IDT7133SA55GB as MASTER in width-expanded configurations.
Technical Context
The 7143SA55GB operates as a SLAVE dual-port SRAM with BUSY pin functioning exclusively as an input for write inhibition-unlike the MASTER IDT7133, which drives BUSY as an open-drain output. It supports fully independent, asynchronous access on left and right ports with separate address, data, and control lines.
Its arbitration logic is disabled; contention resolution relies entirely on the connected MASTER's BUSY signal. The device implements separate upper/lower byte write enables (R/WLUB/R/WLLB and R/WRUB/R/WRLB) and uses CE-controlled power-down to achieve 70 mA typical standby current (ISB1) at 55 ns speed grade.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 16 bits (32,768 bits total); supports independent 16-bit reads/writes per port |
| Access Time | 55 ns max read cycle time (tRC); defines minimum clock-to-data timing in synchronous interfaces |
| Supply Voltage | 5.0 V ±10%; requires both VCC pins connected for reliable operation per datasheet note |
| Operating Temp | –40°C to +85°C (industrial grade); validated across full range for stable dual-port timing |
| Standby Current | 70 mA max (ISB1, both ports TTL-level standby); enables low-power hold during CPU idle cycles |
| Bus Interface | TTL-compatible I/O; no level-shifting required when interfacing with 5V microcontrollers or FPGAs |
| BUSY Function | Input-only pin; gates internal write when asserted-no arbitration logic or output driver on this device |
Pinout & Package
7143SA55GB is packaged in a 68-pin PLCC (PLG68) with 0.95″ × 0.95″ footprint. Both VCC and GND pins must be externally connected per datasheet requirement to ensure signal integrity and thermal stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left/Right) | Active-low enable per port; controls port-specific power-down and memory access |
| R/WLUB / R/WRUB | Upper Byte Write Enable | Independent write control for I/O8–I/O15 on each port; enables byte-select writes |
| R/WLLB / R/WRLB | Lower Byte Write Enable | Independent write control for I/O0–I/O7 on each port; supports 8-bit sub-word updates |
| OEL / OER | Output Enable (Left/Right) | Tri-states I/O bus when high; allows shared data bus usage in multi-device systems |
| BUSYL / BUSYR | BUSY Input (Left/Right) | Write-inhibit inputs only; must be driven by MASTER's BUSY outputs to prevent contention |
| A0L–A10L / A0R–A10R | Address Inputs | 11-bit address per port (2K = 211); supports independent addressing of same or different locations |
| I/O0L–I/O15L / I/O0R–I/O15R | Data I/O (16-bit bidirectional) | Fully independent 16-bit data paths; no internal multiplexing between ports |
Key Features
| Feature | Design Value |
|---|---|
| SLAVE-only BUSY interface | Eliminates need for external OR-gating or arbitration logic when paired with IDT7133 MASTER |
| Byte-select write control | Enables partial-word writes without read-modify-write cycles-critical for real-time control registers |
| Asynchronous dual-port operation | Allows simultaneous read/write from independent controllers (e.g., DSP + host CPU) with no clock domain synchronization |
| Industrial temperature support | Validated operation from –40°C to +85°C ensures reliability in embedded motor drives and industrial PLCs |
| 5V TTL compatibility | Direct interface with legacy microcontrollers, FPGAs, and ASICs without level translators or voltage regulators |
Applications
| Motor Control System | DSP-Host Data Bridge |
|---|---|
Use Scenario: Real-time servo loop running on DSP accesses position feedback while host CPU updates trajectory parameters. IC Role / Device Role / Timing Role: 7143SA55GB serves as SLAVE in 32-bit dual-port RAM bank, accepting synchronized writes from host and reads from DSP with zero wait states. Use Value: Eliminates software arbitration overhead and guarantees atomic 16-bit parameter updates without stalling either processor. | Use Scenario: FPGA-based video processing pipeline streams frame buffers to ARM host for analytics. IC Role / Device Role / Timing Role: 7143SA55GB provides non-blocking 16-bit data path between FPGA (left port) and ARM (right port) using CE-gated burst transfers. Use Value: Enables concurrent frame capture and analysis with deterministic latency bounded by 55 ns tRC-not dependent on OS scheduling. |
| Redundant Controller Sync | Avionics Data Logger |
Use Scenario: Dual-redundant flight computers maintain identical state via periodic cross-checks. IC Role / Device Role / Timing Role: 7143SA55GB acts as SLAVE in mirrored memory pair, receiving state snapshots from ACTIVE controller (MASTER) and serving reads to STANDBY controller. Use Value: Hardware-enforced write gating via BUSY prevents conflicting updates during failover transitions. | Use Scenario: Black-box recorder captures sensor telemetry at 10 kHz while allowing ground station readout over RS-422. IC Role / Device Role / Timing Role: 7143SA55GB buffers sensor data on left port (write) and streams logs on right port (read), isolated by separate CE timing. Use Value: Sustains continuous 55 ns-cycle writes while supporting asynchronous readouts-no FIFO overflow or dropped samples. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT7143SA45GB | 45 ns max access time; lower power (ISB1 = 65 mA); same 68-pin PLCC package and pinout | Suitable for cost-sensitive industrial systems where 55 ns timing margin is unnecessary | Select when system clock budget allows relaxed timing and lower standby current is prioritized |
| Cypress CY7C1371DV33-55BGXI | 3.3V core supply; 55 ns access; 2K × 16 configuration; 100-pin TQFP package | Requires level translation for 5V systems; not drop-in compatible due to voltage and package mismatch | Consider only for new 3.3V designs needing extended temperature support (–40°C to +105°C) |
Compared with IDT7143SA45GB and CY7C1371DV33-55BGXI, the 7143SA55GB delivers optimal balance of industrial-grade timing margin, 5V native interface, and SLAVE-specific BUSY input behavior-making it the preferred choice for upgrading existing IDT7133/7143 width-expanded systems.
Availability
7143SA55GB is available at Aetrix Electronics and suitable for motor control systems, DSP-host bridges, redundant controller synchronization, and avionics data loggers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 7143SA55GB 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, and RF solutions, now part of Renesas Electronics.
The IDT7143 product line delivers SLAVE-configured dual-port SRAMs designed specifically for width-expansion architectures with MASTER/SLAVE arbitration-targeting high-reliability industrial, aerospace, and real-time control applications.
FAQ
What is the role of BUSY pins on the 7143SA55GB?
The BUSY pins (BUSYL and BUSYR) on the 7143SA55GB function exclusively as inputs-not outputs-to receive write-inhibit signals from a MASTER device (e.g., IDT7133SA55GB). When asserted, they block internal write operations to prevent memory contention. Unlike the MASTER, the 7143SA55GB contains no arbitration logic or open-drain drivers on these pins.
Can the 7143SA55GB operate as a standalone dual-port RAM without a MASTER?
Yes, the 7143SA55GB can operate independently as a standalone 2K × 16 dual-port SRAM with full asynchronous access on both ports. Its BUSY inputs may be tied HIGH to disable write inhibition, enabling standard dual-port behavior. However, hardware arbitration during simultaneous same-address access must then be managed externally.
Which packages are available for the 7143SA55GB?
The 7143SA55GB is available in 68-pin PLCC (PLG68), 68-pin ceramic PGA (GU68), 68-pin flatpack (FP68), and 100-pin TQFP (PNG100) packages. All variants share identical pin functions and timing specifications; mechanical dimensions and thermal characteristics differ per package type as documented in the datasheet drawings.
Does the 7143SA55GB support battery backup operation?
No-the 7143SA55GB (SA suffix) is the standard-power version and does not support battery backup data retention. For 2V data retention capability, the LA-suffix variant (e.g., 7143LA55GB) must be selected, which reduces standby current to 5 µA typical and enables operation down to VCC = 2.0 V.
How does the 7143SA55GB differ from the IDT7133SA55GB in system design?
The 7143SA55GB is a SLAVE device with BUSY inputs only and no on-chip arbitration logic, whereas the IDT7133SA55GB is a MASTER with BUSY outputs and internal port arbitration. In width-expanded systems, only one IDT7133SA55GB drives BUSY signals to multiple 7143SA55GB SLAVEs-preventing "busy lock-out" and eliminating external logic.
7143SA55GB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 68-BPGA
- 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:
- 55ns
- Access Time:
- 55 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 68-PGA (29.46x29.46)
7143SA55GB FAQ
1.How can I place an order for 7143SA55GB through Aetrix?
Please submit a Request for Quotation (RFQ) for 7143SA55GB 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 7143SA55GB reliable?
The price and inventory of 7143SA55GB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7143SA55GB is usually 5 days.
3.What payment methods are accepted for 7143SA55GB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7143SA55GB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7143SA55GB?
7143SA55GB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7143SA55GB 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 7143SA55GB?
For technical support, including 7143SA55GB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7143SA55GB requirements.
6.How does Aetrix verify that 7143SA55GB is sourced from the original manufacturer or authorized distributors?
All 7143SA55GB 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 7143SA55GB meets industry standards.
7.What is the process for return or replacement of 7143SA55GB?
All 7143SA55GB units undergo pre-shipment inspection (PSI). If there is an issue with 7143SA55GB, 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 7143SA55GB part is unused and in its original packaging.
Return procedure for 7143SA55GB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7143SA55GB Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
Microchip Technology
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24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
STMicroelectronics
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AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
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24LC01BT-I/SN
Microchip Technology
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24AA02UIDT-I/OT
Microchip Technology
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AT24C08C-STUM-T
Microchip Technology
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