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Renesas 71342SA25JI8
- Part No.:
- 71342SA25JI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 52-LCC (J-Lead)
- Datasheet:
-
71342SA25JI8.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 52PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,499
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Product details
Overview
IDT71342SA25JI8 from Integrated Device Technology is a high-speed 4K × 8 dual-port static RAM with on-chip semaphore logic, operating at 25 ns max access time over –40°C to +85°C industrial temperature range, powered by single 5V ±10% supply, and used in real-time interprocessor communication systems requiring concurrent memory access without software arbitration.
For engineers reviewing the IDT71342SA25JI8 datasheet, IDT71342SA25JI8 pinout, IDT71342SA25JI8 application, or IDT71342SA25JI8 equivalent, this device delivers deterministic port-to-port synchronization via hardware semaphores, supports battery-backed data retention (LA variant only), and enables lock-free resource sharing between independent CPU subsystems in embedded control and telecom infrastructure.
Technical Context
The IDT71342SA25JI8 implements fully asynchronous dual-port architecture with separate address, control, and I/O buses for left and right ports-enabling simultaneous read/write operations without bus contention. Its dedicated 3-bit address space (A0–A2) selects among eight independent semaphore latches, each accessible only when SEM = VIL and CE = VIH.
Semaphore flags operate as active-low token registers: writing '0' requests ownership (locking write access to the opposite port), while writing '1' releases it. The device uses CMOS process technology, achieves 700 mW typical active power, and enters ultra-low-power standby (1 mW typ.) when both CE and SEM are high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 8 bits (32 Kbit total), split into two independent 4K × 8 ports |
| Access Time (tAA) | 25 ns max - guarantees deterministic latency for real-time inter-processor handshaking |
| Operating Voltage | 5.0 V ±10% - compatible with legacy TTL-level system rails without level translation |
| Temperature Range | –40°C to +85°C - qualified for industrial-grade embedded control and base station applications |
| Semaphore Count | 8 independent binary flags - enables concurrent management of up to eight shared resources |
| Power Consumption | 700 mW typical active, 1 mW typical standby - reduces thermal load in dense multi-CPU modules |
| Package Type | 64-pin TQFP (PNG64) - surface-mount compatible with automated PCB assembly and thermal dissipation requirements |
Pinout & Package
Package: 64-pin Thin Quad Flat Package (TQFP), body size 14 mm × 14 mm × 1.4 mm, lead pitch 0.5 mm, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A11L | Left port address inputs | 12-bit address bus for left-side memory access (4K = 2¹²) |
| A0R–A11R | Right port address inputs | 12-bit address bus for right-side memory access - fully independent timing |
| I/O0L–I/O7L | Left port bidirectional data | 8-bit parallel data path; high-impedance when OE = VIH or CE = VIH |
| I/O0R–I/O7R | Right port bidirectional data | 8-bit parallel data path; electrically isolated from left port I/O lines |
| CEL / CER | Chip enable (left/right) | Active-low enables respective port; disables I/O drivers and reduces power when high |
| OEL / OER | Output enable (left/right) | Active-low controls output buffer state - allows shared bus operation |
| R/WL / R/WR | Read/write control (left/right) | Active-low write strobe; high = read mode, low = write mode |
| SEML / SEMR | Semaphore enable (left/right) | Active-low selects semaphore register space instead of RAM array |
| VCC | Power supply | Single 5V ±10% supply; all VCC pins must be decoupled locally |
| GND | Ground reference | All GND pins must be connected to common system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Fully asynchronous dual-port operation | Enables concurrent, independent read/write access from two CPUs without clock domain synchronization |
| On-chip hardware semaphore logic | Eight dedicated binary flags with atomic set/test behavior eliminate software race conditions in resource arbitration |
| Automatic power-down mode | CE + SEM high disables internal circuitry per port, reducing standby current to 1 mA typical |
| TTL-compatible interface | Direct connection to 5V microcontrollers and FPGAs without level shifters or external buffers |
| Industrial temperature qualification | Validated operation from –40°C to +85°C ensures reliability in harsh environments like factory automation and telecom equipment |
Applications
| Telecom Baseband Processing | Industrial PLC Dual-Core Coordination |
|---|---|
Use Scenario: Two DSPs share configuration tables and real-time packet buffers in a 4G/LTE baseband unit. IC Role / Device Role / Timing Role: IDT71342SA25JI8 serves as synchronized shared memory with hardware-enforced mutual exclusion for DMA descriptors and interrupt status registers. Use Value: Eliminates wait-state penalties during cross-core descriptor updates, sustaining 40 MB/s sustained throughput across both ports. |
Use Scenario: A safety-critical PLC uses dual ARM Cortex-M7 cores-one for control loop execution, one for diagnostics and HMI updates. IC Role / Device Role / Timing Role: IDT71342SA25JI8 provides lock-free exchange of sensor fusion results and actuator command queues via semaphore-gated memory regions. Use Value: Guarantees sub-25 ns inter-core signaling latency, meeting IEC 61508 SIL-3 timing constraints for fail-safe response. |
| Avionics Flight Control Interface | Medical Imaging Real-Time Buffering |
Use Scenario: Redundant flight computers exchange attitude estimates and servo commands in fly-by-wire systems. IC Role / Device Role / Timing Role: IDT71342SA25JI8 acts as deterministic shared memory with hardware semaphore arbitration for critical control data exchange. Use Value: Prevents priority inversion during simultaneous read/write attempts, ensuring worst-case 25 ns response for command validation. |
Use Scenario: MRI scanner front-end FPGA streams raw ADC data to host processor while simultaneously receiving reconstruction parameters. IC Role / Device Role / Timing Role: IDT71342SA25JI8 functions as zero-latency ping-pong buffer with semaphore-controlled buffer ownership handoff. Use Value: Enables continuous 12-bit, 100 MSPS data flow without FIFO overflow or CPU polling overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM with semaphore applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C024AV-25AXC | 25 ns access, 4K × 8, but uses separate semaphore enable pin (SEM#) and lacks integrated flag arbitration logic | Requires external logic or firmware coordination for semaphore conflict resolution | Select when existing design uses Cypress toolchain and can accommodate added software complexity |
| IS61LV25616AL-10TLI | 10 ns access, 256K × 16, no built-in semaphore logic; requires external arbiter IC or FPGA logic | Higher density but no hardware semaphore - increases BOM count and firmware development effort | Choose only if bandwidth and capacity outweigh need for deterministic inter-core synchronization |
Compared with CY7C024AV-25AXC and IS61LV25616AL-10TLI, the IDT71342SA25JI8 uniquely integrates atomic semaphore latches with full port independence, eliminating external arbitration components and guaranteeing sub-25 ns interprocessor handshake latency without software intervention.
Availability
IDT71342SA25JI8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, avionics control units, and medical imaging systems requiring stable component supply across extended product lifecycles.
Supply support for IDT71342SA25JI8 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
Integrated Device Technology (IDT), now part of Renesas Electronics, designs high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.
The IDT71342SA25JI8 belongs to IDT's dual-port SRAM product line, engineered specifically for deterministic, low-latency interprocessor communication in safety- and performance-critical embedded systems.
FAQ
What is the maximum guaranteed access time for IDT71342SA25JI8?
The IDT71342SA25JI8 has a maximum access time (tAA) of 25 ns across the full industrial temperature range (–40°C to +85°C) under VCC = 5.0 V ±10%. This value is production-tested and guaranteed per the datasheet AC Electrical Characteristics table for the 'X25' speed grade.
Does IDT71342SA25JI8 support battery backup for data retention?
No - the IDT71342SA25JI8 is the SA (standard power) variant and does not support battery backup. Only the LA variant (e.g., IDT71342LA25JI8) guarantees 2 V data retention with typical ICCDR ≤ 1500 µA. The SA version lacks the low-voltage retention circuitry and is optimized for higher-speed operation.
How many semaphore flags does IDT71342SA25JI8 provide, and how are they addressed?
The IDT71342SA25JI8 provides eight independent hardware semaphore flags, accessed exclusively via address bits A0–A2 while SEM = VIL and CE = VIH. All other address lines (A3–A11) are ignored during semaphore access, and only I/O0 is used for writing flag state ('0' to request, '1' to release).
Can both ports of IDT71342SA25JI8 perform simultaneous read and write operations on the same memory location?
No - simultaneous read and write to the same non-semaphore memory location causes undefined data output and potential bus contention. The IDT71342SA25JI8 permits concurrent access only to *different* addresses. Semaphore locations are protected against such conflicts via dedicated latch architecture.
What package type is used for IDT71342SA25JI8, and is it lead-free?
IDT71342SA25JI8 is packaged in a 64-pin TQFP (PNG64) with 0.5 mm pitch, 14 mm × 14 mm body, and 1.4 mm height. It is RoHS-compliant and lead-free per JEDEC J-STD-020 moisture sensitivity level 3, rated for reflow peak temperature of 260°C.
71342SA25JI8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 52-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Asynchronous
- Memory Size:
- 32Kbit
- Memory Organization:
- 4K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 25ns
- Access Time:
- 25 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 52-PLCC (19.13x19.13)
71342SA25JI8 FAQ
1.How can I place an order for 71342SA25JI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 71342SA25JI8 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 71342SA25JI8 reliable?
The price and inventory of 71342SA25JI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71342SA25JI8 is usually 5 days.
3.What payment methods are accepted for 71342SA25JI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71342SA25JI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71342SA25JI8?
71342SA25JI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71342SA25JI8 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 71342SA25JI8?
For technical support, including 71342SA25JI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71342SA25JI8 requirements.
6.How does Aetrix verify that 71342SA25JI8 is sourced from the original manufacturer or authorized distributors?
All 71342SA25JI8 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 71342SA25JI8 meets industry standards.
7.What is the process for return or replacement of 71342SA25JI8?
All 71342SA25JI8 units undergo pre-shipment inspection (PSI). If there is an issue with 71342SA25JI8, 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 71342SA25JI8 part is unused and in its original packaging.
Return procedure for 71342SA25JI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
71342SA25JI8 Tags
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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