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Renesas 71342SA55J8
- Part No.:
- 71342SA55J8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 52-LCC (J-Lead)
- Datasheet:
-
71342SA55J8.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 52PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,147
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Product details
Overview
IDT71342SA55J8 from Integrated Device Technology is a high-speed 4K × 8 dual-port static RAM with on-chip semaphore logic, operating at 55 ns max read cycle time, supporting independent asynchronous access from left and right ports, and featuring TTL-compatible 5V ±10% supply - used in real-time interprocessor communication systems requiring concurrent memory access without software arbitration.
For engineers reviewing the IDT71342SA55J8 datasheet, IDT71342SA55J8 pinout, IDT71342SA55J8 application, or IDT71342SA55J8 equivalent, this device delivers deterministic port-to-port timing (tDDD = 55 ns), hardware semaphore contention resolution (tSPS = 10 ns), low-power standby (ISB3 = 1.0 mA typ.), and industrial-grade reliability across –40°C to +85°C.
Technical Context
The IDT71342SA55J8 implements fully asynchronous dual-port architecture with separate address, control, and I/O buses for left (L) and right (R) ports, enabling simultaneous read/write operations without bus contention except at non-semaphore memory locations. Its dedicated 3-bit semaphore address space (A0–A2) and SEM pin enable hardware-level token passing between processors.
Semaphore logic uses dual request latches per flag with priority arbitration: only one side can write '0' to claim a flag, and the first valid write wins; subsequent writes from the other side are latched but deferred until release. Flag reads return uniform 8-bit values (all 0s or all 1s), latched on SEM/OE activation to prevent mid-cycle state changes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 8 bits (32,768 bits total), split into main RAM and 8 semaphore flag locations |
| Read Cycle Time (tRC) | 55 ns max - defines minimum interval between successive reads on same port |
| Address Access Time (tAA) | 55 ns max - determines earliest valid data output after address stabilization |
| Write Pulse Width (tWP) | 50 ns min - ensures reliable data capture during write cycles |
| Full Standby Current (ISB3) | 1.0 mA typical - power consumed when both ports disabled with CMOS-level inputs |
| Supply Voltage | 4.5 V to 5.5 V - supports standard TTL-compatible 5V systems with ±10% tolerance |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments without derating |
Pinout & Package
Package: 64-pin TQFP (PNG64), 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, electrically isolated |
| I/O0L–I/O7L | Left port bidirectional data | 8-bit data path; high-impedance when OE/CE inactive |
| I/O0R–I/O7R | Right port bidirectional data | 8-bit data path; independent timing and drive capability |
| CEL / CER | Chip enable (left/right) | Active-low enables respective port; controls power-down entry (ISB1–ISB4) |
| OEL / OER | Output enable (left/right) | Active-low enables data outputs; overrides R/W for tri-state control |
| R/WL / R/WR | Read/write control (left/right) | Active-low write; high = read; determines direction of I/O pins |
| SEML / SEMR | Semaphore enable (left/right) | Active-low selects semaphore register space (A0–A2 only); disables RAM access |
| VCC | Power supply | Single 5V ±10% supply; all VCC pins must be connected |
| GND | Ground | Reference for all signals; all GND pins must be connected |
Key Features
| Feature | Design Value |
|---|---|
| Hardware semaphore arbitration | Eight independent binary flags with guaranteed single-winner resolution (tSPS = 10 ns), eliminating software polling overhead |
| Dual-port concurrency | Fully asynchronous operation: left and right ports access memory simultaneously without timing penalty or arbitration delay |
| Low-power standby modes | Four selectable standby states (ISB1–ISB4) down to 1.0 mA typical, controlled by CE/SEM logic levels |
| TTL-compatible interface | Direct connection to 5V microcontrollers and FPGAs without level-shifting; VIH = 2.2 V min, VIL = 0.8 V max |
| Industrial temperature range | Validated operation from –40°C to +85°C with no parameter derating - suitable for embedded control and communications equipment |
Applications
| Real-Time Dual-Processor Systems | High-Speed Data Acquisition Front-Ends |
|---|---|
Use Scenario: Two independent CPUs share sensor data buffers and control registers in a motion-control PLC. IC Role / Device Role / Timing Role: Dual-port RAM acts as synchronized shared memory; semaphores coordinate access to critical I/O registers without CPU stalls. Use Value: Eliminates wait states during cross-processor data exchange; tDDD = 55 ns ensures sub-100 ns port-to-port write-read latency. |
Use Scenario: FPGA-based digitizer captures analog waveforms while ARM processor processes prior frames. IC Role / Device Role / Timing Role: Right port accepts streaming ADC data; left port feeds processed results to host interface - no DMA arbitration needed. Use Value: Enables continuous 55 ns-cycle-rate data ingestion and concurrent analysis; ISB3 = 1.0 mA reduces idle power in battery-backed modules. |
| Telecom Line Card Buffering | Avionics Sensor Fusion Units |
Use Scenario: DSP and network processor exchange packet headers and metadata in a 10Gbps line card. IC Role / Device Role / Timing Role: Acts as zero-latency mailbox memory; semaphore flags signal buffer full/empty status between domains. Use Value: Prevents packet loss under burst traffic via hardware-guaranteed flag ownership; tSWR = 10 ns ensures immediate post-write semaphore visibility. |
Use Scenario: Multiple flight computers read inertial and GPS data from shared memory in a triple-redundant navigation unit. IC Role / Device Role / Timing Role: Provides fault-isolated memory access; semaphores enforce strict read-before-write sequencing for integrity-critical updates. Use Value: Meets DO-254 deterministic timing requirements; –40°C to +85°C rating supports wide ambient operation in unpressurized bays. |
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 |
|---|---|---|---|
| CY7C1352BV33-55AXI | 3.3V supply, 55 ns access, 4K × 16 organization; no integrated semaphore logic | Requires external arbitration logic or software protocol; higher density but incompatible voltage | Select if system uses 3.3V core logic and can implement semaphore in firmware or companion CPLD |
| IDT71344SA55J8 | Same family, 8K × 8 organization; identical pinout, timing, and semaphore architecture | Provides double memory depth; requires PCB layout verification for signal integrity at extended trace lengths | Choose when application needs >4K bytes of shared memory without changing interface or timing margins |
Compared with CY7C1352BV33-55AXI and IDT71344SA55J8, the IDT71342SA55J8 uniquely balances 5V compatibility, hardware semaphore integration, and industrial temperature support in a proven 4K × 8 footprint - making it optimal for legacy 5V designs requiring deterministic interprocessor coordination.
Availability
IDT71342SA55J8 is available at Aetrix Electronics and suitable for real-time dual-processor systems, high-speed data acquisition front-ends, and telecom line card buffering requiring stable component supply across extended production lifecycles.
Supply support for IDT71342SA55J8 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, is a fabless semiconductor company specializing in timing, memory interface, and RF power solutions for high-performance computing and communications infrastructure.
IDT71342SA55J8 belongs to IDT's legacy dual-port SRAM product line, designed specifically for deterministic interprocessor communication in industrial, telecom, and avionics systems where hardware semaphore arbitration eliminates software-induced latency.
FAQ
What is the maximum operating temperature range for the IDT71342SA55J8?
The IDT71342SA55J8 is rated for industrial operation from –40°C to +85°C. This range is validated across all electrical parameters including tRC = 55 ns max, ISB3 = 1.0 mA typical, and VIH/VIL thresholds - no derating required. The device uses CMOS process technology optimized for thermal stability in embedded control environments.
Does the IDT71342SA55J8 support battery backup for data retention?
No, the IDT71342SA55J8 does not support battery backup. Only the LA variant (e.g., IDT71342LA55J8) provides 2V data retention capability. The SA suffix indicates standard active power profile without retention mode; ICC = 140 mA typical during dual-port operation at 55 ns speed grade.
How many semaphore flags does the IDT71342SA55J8 provide, and how are they accessed?
The IDT71342SA55J8 provides eight hardware semaphore flags, each accessible via A0–A2 address lines when SEM is asserted low. Only I/O0 is used for writing; reads return uniform 8-bit values (all 0s or all 1s). Flag ownership is resolved in hardware with tSPS = 10 ns contention window - no external logic required.
What is the pin compatibility between IDT71342SA55J8 and IDT71344SA55J8?
IDT71342SA55J8 and IDT71344SA55J8 share identical 64-pin TQFP (PNG64) packaging, pinout, and timing specifications. The only functional difference is memory depth: 4K × 8 vs. 8K × 8. Address lines A12–A13 are N/C on IDT71342SA55J8 but used on IDT71344SA55J8 - allowing drop-in replacement where additional memory is not required.
Can both ports of the IDT71342SA55J8 perform read and write operations simultaneously?
Yes, both ports operate fully asynchronously: left and right ports can execute independent read or write cycles concurrently. Conflict occurs only when both attempt to write to the same non-semaphore memory location. Semaphore flags are protected against simultaneous writes - hardware guarantees exclusive ownership with tSPS = 10 ns resolution.
71342SA55J8 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:
- 55ns
- Access Time:
- 55 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 52-PLCC (19.13x19.13)
71342SA55J8 FAQ
1.How can I place an order for 71342SA55J8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 71342SA55J8 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 71342SA55J8 reliable?
The price and inventory of 71342SA55J8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71342SA55J8 is usually 5 days.
3.What payment methods are accepted for 71342SA55J8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71342SA55J8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71342SA55J8?
71342SA55J8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71342SA55J8 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 71342SA55J8?
For technical support, including 71342SA55J8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71342SA55J8 requirements.
6.How does Aetrix verify that 71342SA55J8 is sourced from the original manufacturer or authorized distributors?
All 71342SA55J8 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 71342SA55J8 meets industry standards.
7.What is the process for return or replacement of 71342SA55J8?
All 71342SA55J8 units undergo pre-shipment inspection (PSI). If there is an issue with 71342SA55J8, 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 71342SA55J8 part is unused and in its original packaging.
Return procedure for 71342SA55J8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
71342SA55J8 Tags
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