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Renesas 7143SA20PF
- Part No.:
- 7143SA20PF
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
7143SA20PF.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,729
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Product details
Overview
7143SA20PF 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 20 ns maximum read cycle time, 5 V ±10% single supply, and industrial temperature range (–40°C to +85°C). It enables error-free 32-bit-or-wider memory systems without external logic.
For engineers reviewing the 7143SA20PF datasheet, 7143SA20PF pinout, 7143SA20PF application, or 7143SA20PF equivalent, key selection criteria include BUSY input behavior (not output), byte-selectable write control per port, TTL compatibility, 68-pin PLCC package, and low-power standby current of 1 mA (typ.) - critical for real-time embedded control and military-grade data coherency designs.
Technical Context
The 7143SA20PF operates fully asynchronously from either port, with separate address, control, and I/O pins for left (L) and right (R) interfaces. Its BUSY pin functions exclusively as an input for write inhibition - unlike the MASTER IDT7133 - enabling deterministic arbitration in width-expanded systems.
It supports battery backup data retention at 2 V (LA variant only; SA variant not rated for retention), features on-chip power-down via chip enable (CE), and uses CMOS high-performance technology. The device lacks internal arbitration logic - that resides solely in the IDT7133 MASTER - making it strictly dependent on external BUSY signaling for contention resolution.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 16 bits (32,768 bits total); supports independent 16-bit parallel access per port. |
| Access Time (tRC) | 20 ns max (commercial grade); defines minimum read cycle interval for full-speed operation. |
| Supply Voltage | 5.0 V ±10%; single-rail TTL-compatible interface eliminates level-shifting requirements. |
| Operating Temperature | –40°C to +85°C (industrial grade); validated for harsh-environment embedded control. |
| Standby Current | 1 mA (typ.) at VCC = 5 V; enables ultra-low-power hold mode during CPU idle cycles. |
| Package | 68-pin PLCC (PLG68); surface-mount compatible with standard reflow profiles. |
| I/O Voltage Levels | TTL-compatible inputs (VIH = 2.2 V min, VIL = 0.8 V max); ensures direct interfacing with legacy microcontrollers. |
Pinout & Package
68-pin Plastic Leaded Chip Carrier (PLCC, package code PLG68), top-view layout with pin 1 marked by corner notch. Dual-port architecture requires dedicated signal groups for left and right ports, plus shared power/ground pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Active-low port selection; controls power-down state and memory access enable per port. |
| R/WLUB / R/WRUB | Upper Byte Read/Write Enable (L/R) | Independent byte-level write control; enables partial-word writes without read-modify-write overhead. |
| R/WLLB / R/WRLB | Lower Byte Read/Write Enable (L/R) | Complements upper-byte control for granular 8-bit write operations on each port. |
| OEL / OER | Output Enable (L/R) | Tri-states I/O bus when deasserted; essential for bus sharing in multi-master systems. |
| A0L–A10L / A0R–A10R | Address Inputs (L/R) | 11-bit addressing per port; selects one of 2K (2048) locations within the 16-bit-wide memory array. |
| I/O0L–I/O15L / I/O0R–I/O15R | Data I/O (L/R) | Bidirectional 16-bit data path per port; supports simultaneous read/write across ports if non-conflicting addresses. |
| BUSYL / BUSYR | Busy Flag (L/R) | BUSYR is input-only on 7143SA20PF; used to gate write operations during contention - no internal arbitration logic. |
| VCC (×2), GND (×2) | Power Supply | Two VCC and two GND pins required for stable operation; reduces noise coupling and improves signal integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-port asynchronous operation | Enables concurrent CPU and DSP access to shared memory without clock synchronization or software arbitration. |
| Byte-selectable write control | Reduces bus turnaround time and eliminates unnecessary full-word writes - critical for real-time packet buffering. |
| BUSY-input-only architecture | Eliminates need for external pull-up resistors and simplifies timing-critical arbitration in MASTER/SLAVE configurations. |
| Industrial temperature support | Validated operation from –40°C to +85°C ensures reliability in avionics, motor drives, and industrial PLCs. |
| Low standby power (1 mA typ.) | Extends battery life in portable test equipment and maintains data integrity during brown-out conditions. |
Applications
| Real-Time Digital Signal Processing | Avionics Data Buffering |
|---|---|
|
Use Scenario: Simultaneous acquisition and processing of radar return signals using dual-CPU architecture. IC Role / Device Role / Timing Role: SLAVE dual-port RAM providing synchronized 16-bit data exchange between ADC controller (left port) and FFT processor (right port). Use Value: 20 ns access time enables sub-microsecond latency handoff; BUSY input prevents corrupted writes during address collisions in pulse-Doppler processing. |
Use Scenario: Redundant flight control system requiring deterministic memory access between primary and backup processors. IC Role / Device Role / Timing Role: SLAVE unit in 32-bit wide MASTER/SLAVE pair, receiving BUSY signal from IDT7133 to enforce atomic write sequencing. Use Value: Industrial temperature rating and MIL-PRF-38535 QML-compliant manufacturing ensure operational continuity under thermal stress and EMI exposure. |
| Industrial Programmable Logic Controllers | Medical Imaging Frame Buffers |
|
Use Scenario: High-speed I/O scanning where ladder logic execution must not stall during sensor data ingestion. IC Role / Device Role / Timing Role: SLAVE RAM interfaced to motion controller (left port) and HMI display engine (right port), coordinated via external BUSY handshake. Use Value: Byte-enable capability allows selective update of status registers without disturbing active control word fields - improving scan cycle determinism. |
Use Scenario: Ultrasound beamforming subsystem requiring ping-pong frame storage between analog front-end and digital post-processing. IC Role / Device Role / Timing Role: SLAVE device in dual-RAM configuration, accepting pixel data bursts (left port) while feeding processed frames to display controller (right port). Use Value: 68-pin PLCC package enables compact PCB layout; TTL compatibility avoids level translators in cost-sensitive diagnostic equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT7133SA20PF | MASTER device with on-chip arbitration logic and open-drain BUSY output; requires external pull-up resistor. | Used as primary arbitrator in width-expanded systems; cannot operate standalone as SLAVE. | Select when implementing full MASTER/SLAVE pair; not interchangeable with 7143SA20PF due to BUSY direction and arbitration logic presence. |
| CY7C133-25JC | 2K × 16 dual-port SRAM with integrated busy logic and 25 ns access; Cypress Semiconductor part, 5 V only, 68-pin PLCC. | Self-contained arbitration; no MASTER/SLAVE dependency - simpler for small-scale dual-CPU systems. | Choose for drop-in replacement where BUSY output functionality and autonomous arbitration are required, but verify timing compatibility with 20 ns target. |
Compared with IDT7133SA20PF, the 7143SA20PF provides no arbitration logic and accepts BUSY as input only - making it strictly dependent on a MASTER device. Against CY7C133-25JC, it offers faster 20 ns access but requires external arbitration coordination rather than self-contained busy resolution.
Availability
7143SA20PF is available at Aetrix Electronics and suitable for real-time digital signal processing, avionics data buffering, and industrial programmable logic controllers requiring stable component supply, long-term lifecycle support, and MIL-PRF-38535 qualified manufacturing.
Supply support for 7143SA20PF 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 high-performance timing, memory, and interface solutions, acquired by Renesas Electronics in 2019.
The IDT7133/7143 family was designed specifically for deterministic dual-processor memory sharing in military, aerospace, and industrial control systems - emphasizing hardware-enforced coherency over software-managed locking.
FAQ
What is the role of BUSY on the 7143SA20PF?
The BUSY pin on the 7143SA20PF functions exclusively as an input - unlike the IDT7133 MASTER - and serves as a write-inhibit signal. When asserted HIGH, it blocks write operations on the corresponding port. This design enables clean integration into MASTER/SLAVE systems where arbitration is centralized in the IDT7133, and the 7143SA20PF acts as a passive, timing-predictable memory extension.
Can the 7143SA20PF be used as a standalone dual-port RAM without a MASTER device?
Yes, the 7143SA20PF can operate as a standalone dual-port RAM, but without hardware arbitration, simultaneous writes to the same address from both ports will result in undefined data. For deterministic behavior in contention scenarios, it must be paired with an IDT7133 MASTER or managed via external logic - the 7143SA20PF itself contains no arbitration circuitry.
Does the 7143SA20PF support battery backup data retention?
No - battery backup data retention at 2 V is specified only for the LA (low-power) variants (e.g., 7143LA20PF). The 7143SA20PF is the standard-power version and is not characterized for data retention below 4.5 V; its minimum operating VCC is 4.5 V per DC electrical specifications.
What is the significance of the 'PF' suffix in 7143SA20PF?
The 'PF' suffix denotes the 68-pin Plastic Leaded Chip Carrier (PLCC) package - specifically the PLG68 variant. This package is RoHS-compliant, surface-mountable, and thermally rated for industrial temperature operation. It is mechanically and electrically identical to the flatpack (FP68) and ceramic PGA (GU68) variants in pinout but differs in material and reflow profile.
How does the 7143SA20PF handle byte-level writes?
The 7143SA20PF supports independent upper- and lower-byte write enables per port (R/WLUB/R/WLLB for left; R/WRUB/R/WRLB for right). This allows precise 8-bit writes without read-modify-write sequences - reducing bus occupancy and improving throughput in applications like register-mapped peripherals or segmented buffer management within the 7143SA20PF's 2K × 16 memory space.
7143SA20PF 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)
7143SA20PF FAQ
1.How can I place an order for 7143SA20PF through Aetrix?
Please submit a Request for Quotation (RFQ) for 7143SA20PF 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 7143SA20PF reliable?
The price and inventory of 7143SA20PF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7143SA20PF is usually 5 days.
3.What payment methods are accepted for 7143SA20PF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7143SA20PF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7143SA20PF?
7143SA20PF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7143SA20PF 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 7143SA20PF?
For technical support, including 7143SA20PF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7143SA20PF requirements.
6.How does Aetrix verify that 7143SA20PF is sourced from the original manufacturer or authorized distributors?
All 7143SA20PF 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 7143SA20PF meets industry standards.
7.What is the process for return or replacement of 7143SA20PF?
All 7143SA20PF units undergo pre-shipment inspection (PSI). If there is an issue with 7143SA20PF, 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 7143SA20PF part is unused and in its original packaging.
Return procedure for 7143SA20PF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7143SA20PF Tags
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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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AT24C04C-SSHM-T
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