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Renesas 7143SA55G
- Part No.:
- 7143SA55G
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-BPGA
- Datasheet:
-
7143SA55G.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 68PGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,509
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Product details
Overview
7143SA55G 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 55 ns 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 memory systems without external logic.
For engineers reviewing the 7143SA55G datasheet, 7143SA55G pinout, 7143SA55G application, or 7143SA55G equivalent, key selection criteria include BUSY input behavior (not output), byte-level write control per port, 55 ns timing compliance, 68-pin PLCC/TQFP package compatibility, and low-power standby current of 70 mA (TTL-level) or 4 mA (CMOS-level) at industrial temperature.
Technical Context
The 7143SA55G operates as a SLAVE dual-port SRAM with BUSY pin functioning exclusively as a write-inhibit input - unlike the MASTER IDT7133 which drives BUSY as an open-drain output. It lacks on-chip arbitration logic and relies entirely on external BUSY signaling from a MASTER device for contention resolution.
It supports fully asynchronous dual-port reads/writes with separate upper/lower byte write enables (R/WLUB/R/WLLB and R/WRUB/R/WRLB), independent chip enables (CEL/CER), and output enables (OEL/OER); all I/Os are bidirectional and TTL-compatible, with data retention down to 2V for battery backup applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 16 bits (32 Kbit total, organized as two independent 2K-word × 16-bit ports) |
| Read Cycle Time (tRC) | 55 ns max - defines minimum interval between successive read operations on same port |
| Supply Voltage | 5.0 V ±10% - single-rail TTL-compatible operation; no dual-supply or level-shifting required |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded and communications equipment |
| Standby Current (ISB1) | 70 mA max (TTL-level inputs) - power consumption when both ports disabled under active clock-like toggling |
| Full Standby Current (ISB3) | 4 mA max (CMOS-level inputs) - ultra-low quiescent draw during deep sleep with high-impedance control inputs |
| Data Retention Voltage | 2.0 V min - maintains stored data during brown-out or battery-backup mode without refresh |
Pinout & Package
7143SA55G is available in 68-pin PLCC (PLG68), 68-pin ceramic PGA (GU68), 68-pin flatpack (FP68), and 100-pin TQFP (PNG100) packages. Pin functions are identical across all variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Active-low enable controlling port activation; disables I/O drivers and reduces current draw when HIGH |
| R/WLUB / R/WRUB | Upper Byte Write Enable (Left / Right) | Controls write access to I/O8–I/O15; allows byte-selective writes without affecting lower byte |
| R/WLLB / R/WRLB | Lower Byte Write Enable (Left / Right) | Controls write access to I/O0–I/O7; enables independent 8-bit updates per port |
| OEL / OER | Output Enable (Left / Right) | Tri-states I/O pins during reads when asserted; required for bus sharing in multi-device systems |
| BUSYL / BUSYR | Busy Input (Left / Right) | SLAVE-only function: write-inhibit signal - forces high-impedance I/O and blocks writes when LOW |
| A0L–A10L / A0R–A10R | Address Inputs (Left / Right) | 11-bit address bus per port; supports full 2K-word addressing independently on each side |
| I/O0L–I/O15L / I/O0R–I/O15R | Bidirectional Data Bus (Left / Right) | 16-bit parallel data path per port; electrically isolated and asynchronously controllable |
Key Features
| Feature | Design Value |
|---|---|
| Dual-port asynchronous operation | Enables concurrent CPU and peripheral access to shared memory without software arbitration or wait states |
| Byte-selectable write control | Permits partial-word updates (upper/lower 8-bit) on either port, reducing bus traffic and avoiding read-modify-write cycles |
| BUSY-input-only SLAVE architecture | Eliminates need for external arbitration logic when paired with IDT7133 MASTER; simplifies 32-bit+ width expansion |
| 2V data retention | Preserves memory contents during power loss or battery-backed operation without external circuitry |
| Industrial temperature qualification | Validated for continuous operation from –40°C to +85°C, suitable for base stations, motor drives, and industrial controllers |
Applications
| Telecom Line Card Buffering | Real-Time Motion Control Memory |
|---|---|
Use Scenario: Dual-CPU communication buffer in TDM-based line cards where DSP handles signal processing and ARM manages protocol stack. IC Role / Device Role / Timing Role: SLAVE 7143SA55G synchronizes with MASTER 7133SA55G to form 32-bit shared memory; BUSY input prevents simultaneous writes to same address. Use Value: Eliminates external arbitration logic and guarantees deterministic latency under contention, meeting sub-100 ns real-time response requirements. |
Use Scenario: Shared memory between motion controller FPGA and safety PLC in servo drive systems requiring deterministic I/O exchange. IC Role / Device Role / Timing Role: 7143SA55G provides 55 ns-accessible dual-port RAM for position/velocity command exchange; byte-enable allows independent update of axis-specific parameters. Use Value: Enables lock-free, hardware-synchronized data transfer between safety-critical and performance-critical subsystems without software overhead. |
| Avionics Display Frame Buffer | Test Equipment Pattern Generator |
Use Scenario: Frame buffer coherency between graphics processor and display controller in ruggedized cockpit displays. IC Role / Device Role / Timing Role: 7143SA55G acts as SLAVE in 32-bit wide memory bank; BUSY input ensures display controller never overwrites active rendering data. Use Value: Prevents visual artifacts during rapid screen updates by enforcing hardware-enforced write serialization without CPU intervention. |
Use Scenario: High-speed stimulus/response memory in automated test equipment generating and capturing digital patterns at >10 MHz rates. IC Role / Device Role / Timing Role: 7143SA55G stores pattern sequences on one port while test sequencer reads results on the other - both operating asynchronously at 55 ns timing. Use Value: Delivers deterministic 55 ns access latency and zero-software-latency data handoff between generation and capture engines. |
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 CY7C1362AV-55AXC | 55 ns access, 2K × 16, but uses active-HIGH BUSY and includes internal arbitration; pinout incompatible | Requires redesign of BUSY routing and arbitration logic; not drop-in for IDT7143-based systems | Select only if migrating to integrated arbitration architecture and redesigning PCB layout |
| ISSI IS61WV204816BLL-55NLI | 55 ns, 2K × 16, single-port only; no BUSY or dual-port arbitration features | Cannot replace 7143SA55G in MASTER/SLAVE configurations; requires external FIFO or dual-CPU coordination logic | Consider only for cost-sensitive non-contention applications where true dual-port concurrency is unnecessary |
Compared with CY7C1362AV-55AXC and IS61WV204816BLL-55NLI, the 7143SA55G uniquely delivers SLAVE-specific BUSY-input behavior and identical pinout to IDT7133 MASTER devices - enabling seamless width expansion without gate count penalty or timing recalculations.
Availability
7143SA55G is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, and avionics display systems requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.
Supply support for 7143SA55G 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 family was designed specifically as SLAVE dual-port SRAMs to pair with IDT7133 MASTER devices, enabling scalable, contention-free memory expansion in high-reliability embedded systems.
FAQ
What is the role of BUSY pins on the 7143SA55G?
The BUSY pins (BUSYL and BUSYR) on the 7143SA55G function exclusively as write-inhibit inputs - not outputs. When pulled LOW, they block write operations on the corresponding port and force I/O pins into high-impedance state. This SLAVE-only behavior enables clean integration with IDT7133 MASTER devices that drive BUSY signals. The 7143SA55G contains no internal arbitration logic.
Can the 7143SA55G operate standalone without a MASTER device?
Yes, the 7143SA55G can operate as a standalone dual-port SRAM without a MASTER device. In this configuration, BUSYL and BUSYR must be tied HIGH to enable normal write functionality. Its dual-port architecture still permits independent asynchronous access on left and right ports - but hardware contention detection and resolution require external logic or software coordination.
Which packages are available for the 7143SA55G?
The 7143SA55G is offered in four industry-standard packages: 68-pin PLCC (PLG68), 68-pin ceramic PGA (GU68), 68-pin flatpack (FP68), and 100-pin TQFP (PNG100). All variants share identical pinout and electrical specifications; mechanical dimensions and thermal characteristics differ per package type as documented in IDT's packaging drawings.
Does the 7143SA55G support battery backup operation?
Yes, the 7143SA55G supports battery backup operation with guaranteed data retention down to VCC = 2.0 V. This feature is inherent to the SA/LA process and requires no external components. During retention mode, CE must be held HIGH and inputs biased to valid logic levels (VIL < 0.8 V or VIH > 2.2 V) to minimize leakage current.
How does the 7143SA55G differ from the 7133SA55G in system design?
The 7143SA55G is a SLAVE device with BUSY inputs and no internal arbitration, while the 7133SA55G is a MASTER with BUSY outputs and on-chip arbitration logic. In width-expanded systems, only one 7133SA55G drives BUSY signals to multiple 7143SA55G SLAVE devices. Using 7143SA55G as MASTER - or vice versa - will cause functional failure due to incompatible BUSY directionality and missing arbitration logic.
7143SA55G 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)
7143SA55G FAQ
1.How can I place an order for 7143SA55G through Aetrix?
Please submit a Request for Quotation (RFQ) for 7143SA55G 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 7143SA55G reliable?
The price and inventory of 7143SA55G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7143SA55G is usually 5 days.
3.What payment methods are accepted for 7143SA55G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7143SA55G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7143SA55G?
7143SA55G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7143SA55G 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 7143SA55G?
For technical support, including 7143SA55G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7143SA55G requirements.
6.How does Aetrix verify that 7143SA55G is sourced from the original manufacturer or authorized distributors?
All 7143SA55G 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 7143SA55G meets industry standards.
7.What is the process for return or replacement of 7143SA55G?
All 7143SA55G units undergo pre-shipment inspection (PSI). If there is an issue with 7143SA55G, 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 7143SA55G part is unused and in its original packaging.
Return procedure for 7143SA55G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7143SA55G 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
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24LC01BT-I/OT
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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
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24AA02UIDT-I/OT
Microchip Technology
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AT24C08C-STUM-T
Microchip Technology
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