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Renesas 71342SA25PFI8
- Part No.:
- 71342SA25PFI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 64-LQFP
- Datasheet:
-
71342SA25PFI8.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,259
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Product details
Overview
IDT71342SA25PFI8 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, supporting independent asynchronous reads/writes on left and right ports, and rated for industrial temperature range (–40°C to +85°C). It enables real-time interprocessor communication in tightly coupled dual-CPU systems such as motion controllers and industrial PLCs.
For engineers reviewing the IDT71342SA25PFI8 datasheet, IDT71342SA25PFI8 pinout, IDT71342SA25PFI8 application, or IDT71342SA25PFI8 equivalent, this device delivers deterministic port-to-port arbitration via hardware semaphores, low-power standby modes (1.0 mA full CMOS standby), TTL-compatible 5V ±10% operation, and 64-pin TQFP packaging - critical for deterministic embedded control designs requiring zero-wait-state resource sharing.
Technical Context
The IDT71342SA25PFI8 implements fully independent left/right port control logic with separate address decoders, I/O drivers, and CE/OE/R/W signal paths - enabling true concurrent access without timing coupling. Its semaphore block consists of eight dedicated binary latches accessible via A0–A2 under SEM = VIL, with active-low token semantics and automatic contention resolution.
All timing parameters are specified over –40°C to +85°C with VCC = 5.0 V ±10%; read cycle time tRC is 25 ns (max), write cycle time tWC is 25 ns (max), and semaphore address access time tSAA is 25 ns (max). Power-down is controlled independently per port via CE and SEM high states, achieving ISB3 = 1.0 mA (typ) full standby current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 8 bits (4096 words × 8 data lines) - supports byte-wide parallel data exchange between two processors. |
| Access Time (tAA) | 25 ns (max) - enables sub-40 MHz synchronous bus interfacing without wait states in FPGA or microcontroller co-processor designs. |
| Operating Voltage | 5.0 V ±10% - TTL-compatible supply eliminates level-shifting needs in legacy industrial control backplanes. |
| Temperature Range | –40°C to +85°C - qualified for deployment in uncontrolled industrial enclosures and factory automation environments. |
| Standby Current (ISB3) | 1.0 mA (typ) - allows continuous power-down during idle periods in battery-backed or energy-constrained edge nodes. |
| Semaphore Count | 8 independent flags - sufficient to coordinate access across multiple shared peripherals (e.g., ADC, DAC, UART, memory-mapped registers). |
| Package | 64-pin TQFP (PNG64), 14 mm × 14 mm × 1.4 mm - surface-mount compatible with automated PCB assembly and thermal management in dense control modules. |
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; no effect when accessing semaphores (only A0–A2 used). |
| A0R–A11R | Right-port address inputs | 12-bit address bus for right-side memory access; fully independent from left-port addressing. |
| I/O0L–I/O7L | Left-port bidirectional data bus | 8-bit parallel data path; high-impedance when OE = VIH or CE = VIH; supports byte-wide transfers. |
| I/O0R–I/O7R | Right-port bidirectional data bus | 8-bit parallel data path; electrically isolated from left-port I/O; enables simultaneous read/write operations. |
| CEL / CER | Left/right chip enable | Active-low enables respective port; both must be low for SRAM access; high disables port and enters standby mode. |
| OEL / OER | Left/right output enable | Active-low controls output driver state; used to tri-state I/O during writes or when port is inactive. |
| R/WL / R/WR | Left/right write enable | Active-low initiates write cycles; high enables read operations; determines direction of data flow on I/O pins. |
| SEML / SEMR | Left/right semaphore enable | Active-low selects semaphore register space (A0–A2 only); high enables normal SRAM access (CE-driven). |
| VCC / GND | Power and ground | Single 5V supply; all VCC pins must be connected to decoupled 5V rail; all GND pins tied to solid ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware semaphore logic | Eight independent, contention-resolving binary flags accessed via dedicated SEM control - eliminates software polling loops and guarantees atomic token acquisition. |
| Full port independence | No timing coupling between left and right ports - simultaneous read/write to same or different addresses incurs no performance penalty or arbitration delay. |
| Multi-level power management | Four standby modes (ISB1–ISB4) with CMOS-level input detection - achieves 1.0 mA full standby (ISB3) and supports battery backup retention (not applicable to SA grade). |
| TTL-compatible interface | VIH = 2.2 V min, VIL = 0.8 V max - interoperable with legacy 5V microcontrollers, FPGAs, and ASICs without level shifters. |
| Deterministic contention resolution | Simultaneous semaphore requests resolved in hardware with guaranteed single-token assignment - prevents deadlock and ensures bounded response latency. |
Applications
| Industrial Motion Controller | Redundant PLC Backplane |
|---|---|
|
Use Scenario: Two synchronized DSPs coordinate motor phase sequencing and safety monitoring in real time. IC Role / Device Role / Timing Role: Dual-port RAM serves as shared command buffer and status register; semaphores coordinate access to torque-limiting registers and fault-handling routines. Use Value: Eliminates 2–3 µs software arbitration delays per resource access, enabling 100 kHz servo loop updates with deterministic jitter < 50 ns. |
Use Scenario: Primary and backup CPU modules exchange I/O state snapshots and configuration data across a hot-swap backplane. IC Role / Device Role / Timing Role: Acts as coherent shared memory with hardware-enforced mutual exclusion; semaphores lock configuration update windows during firmware upgrades. Use Value: Prevents partial-write corruption during failover; guarantees atomic 8-byte state transitions without external arbitration logic or bus locking. |
| Avionics Display Processor | Medical Imaging Data Pipeline |
|
Use Scenario: Graphics processor renders UI while safety-critical monitor core validates rendering integrity frame-by-frame. IC Role / Device Role / Timing Role: Shared frame metadata buffer with semaphore-controlled access to timestamp, checksum, and validation flag registers. Use Value: Enables zero-copy, lock-free synchronization between safety-certified and non-certified partitions - satisfying DO-254 Level A timing assurance requirements. |
Use Scenario: FPGA-accelerated image reconstruction engine streams processed slices to ARM-based display controller. IC Role / Device Role / Timing Role: High-bandwidth pixel buffer with semaphores managing slice ownership between pipeline stages (FFT → filter → quantization → display). Use Value: Sustains 1.2 GB/s aggregate throughput (2 × 480 MB/s ports) with sub-30 ns interlock latency - avoids FIFO overflow in real-time CT/MRI reconstruction. |
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 |
|---|---|---|---|
| CY7C1355BV33-25AC | 3.3V-only operation, 25 ns access, 4K × 16 organization; no integrated semaphore logic - requires external arbitration logic or software protocol. | Requires redesign of power delivery and level-shifting; lacks hardware semaphore atomicity - increases software complexity and worst-case latency. | Select only if migrating to 3.3V system architecture and implementing custom semaphore firmware or external logic. |
| IDT71322LA25PFI | Same family, LA variant with 2V data retention; identical pinout and timing but higher standby current (4.0 mA ISB3 vs. 1.0 mA) and lower speed grade margin. | Compatible drop-in replacement where battery backup is required; not suitable for ultra-low-power standby-critical applications. | Choose when extended data retention during main power loss is mandatory, and 3× higher standby current is acceptable. |
Compared with CY7C1355BV33-25AC and IDT71322LA25PFI, the IDT71342SA25PFI8 provides native 5V TTL compatibility, deterministic hardware semaphore resolution, and lowest full-standby current (1.0 mA) - making it optimal for industrial control systems requiring robust, low-latency, zero-software-overhead resource sharing.
Availability
IDT71342SA25PFI8 is available at Aetrix Electronics and suitable for industrial motion controllers, redundant PLC backplanes, avionics display processors, and medical imaging data pipelines requiring stable component supply across extended product lifecycles.
Supply support for IDT71342SA25PFI8 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, RF, and sensor signal conditioning ICs for high-performance computing and industrial applications.
The IDT71342SA25PFI8 belongs to IDT's dual-port SRAM product line, designed specifically for deterministic interprocessor communication in real-time embedded systems where hardware-enforced mutual exclusion and zero-wait-state memory access are critical.
FAQ
What is the maximum operating temperature range for the IDT71342SA25PFI8?
The IDT71342SA25PFI8 is rated for industrial temperature operation from –40°C to +85°C. This specification is validated across all AC and DC electrical parameters in the official datasheet (DSC 2621/16, July 2019), and applies to both SRAM and semaphore functionality under VCC = 5.0 V ±10% conditions.
Does the IDT71342SA25PFI8 support battery backup data retention?
No, the IDT71342SA25PFI8 does not support battery backup data retention. That feature is exclusive to the LA-grade variants (e.g., IDT71342LA25PFI8), which specify VDR = 2.0 V minimum and ICCDR ≤ 1500 µA at 2V. The "SA" suffix denotes standard power grade without retention capability.
How many semaphore flags does the IDT71342SA25PFI8 provide, and how are they accessed?
The IDT71342SA25PFI8 provides eight independent hardware semaphore flags. They reside in a dedicated address space accessed only when SEM = VIL (active low); address bits A0–A2 select the flag (0–7), while D0 carries the write value (0 = request token, 1 = release). All eight I/O pins reflect the flag state during reads.
Is the IDT71342SA25PFI8 pin-compatible with other members of the IDT71342 family?
Yes, the IDT71342SA25PFI8 shares identical 64-pin TQFP (PNG64) pinout with all IDT71342X25 variants including LA-grade parts. Pin functions, voltage levels, timing relationships, and control logic are fully compatible - allowing direct substitution where power and retention requirements align.
What is the minimum pulse width required for reliable write operations on the IDT71342SA25PFI8?
The minimum write pulse width (tWP) for the IDT71342SA25PFI8 is 20 ns (max), as specified in Table 10a of the datasheet. To ensure reliable writes under worst-case conditions, the applied pulse must remain stable for ≥20 ns with valid address and data setup/hold times met - verified across –40°C to +85°C and VCC = 4.5 V to 5.5 V.
71342SA25PFI8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 64-LQFP
- 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:
- 64-TQFP (14x14)
71342SA25PFI8 FAQ
1.How can I place an order for 71342SA25PFI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 71342SA25PFI8 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 71342SA25PFI8 reliable?
The price and inventory of 71342SA25PFI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71342SA25PFI8 is usually 5 days.
3.What payment methods are accepted for 71342SA25PFI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71342SA25PFI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71342SA25PFI8?
71342SA25PFI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71342SA25PFI8 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 71342SA25PFI8?
For technical support, including 71342SA25PFI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71342SA25PFI8 requirements.
6.How does Aetrix verify that 71342SA25PFI8 is sourced from the original manufacturer or authorized distributors?
All 71342SA25PFI8 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 71342SA25PFI8 meets industry standards.
7.What is the process for return or replacement of 71342SA25PFI8?
All 71342SA25PFI8 units undergo pre-shipment inspection (PSI). If there is an issue with 71342SA25PFI8, 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 71342SA25PFI8 part is unused and in its original packaging.
Return procedure for 71342SA25PFI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
71342SA25PFI8 Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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M24C02-FMC6TG
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AT24C04C-SSHM-T
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AT24C08C-STUM-T
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