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Renesas 71342SA35JI8
- Part No.:
- 71342SA35JI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 52-LCC (J-Lead)
- Datasheet:
-
71342SA35JI8.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 52PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,800
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Product details
Overview
IDT71342SA35JI8 from Integrated Device Technology is a high-speed 4K × 8 dual-port static RAM with on-chip semaphore logic, operating at 35 ns max access time, TTL-compatible with single 5V ±10% supply, and rated for commercial temperature range (0°C to +70°C). It enables concurrent asynchronous read/write access from left and right ports in real-time interprocessor communication systems such as industrial motion controllers.
For engineers reviewing the IDT71342SA35JI8 datasheet, IDT71342SA35JI8 pinout, IDT71342SA35JI8 application, or IDT71342SA35JI8 equivalent, this page delivers verified timing parameters, validated PLCC-52 package mapping, confirmed dual-port arbitration behavior, and precise semaphore flag control logic - all critical for deterministic shared-memory system design.
Technical Context
The IDT71342SA35JI8 implements fully independent left/right port control with separate address, data, and control lines (A0L–A11L/I/O0L–I/O7L/R/WL/CEL/OEL vs. A0R–A11R/I/O0R–I/O7R/R/WR/CER/OER), enabling true asynchronous operation without bus contention. Its dedicated 3-bit semaphore address space (A0–A2) and SEM pin enable hardware-assisted token passing between processors.
Semaphore flags are active-low latches isolated from main memory; write '0' to claim, write '1' to release, with automatic contention resolution guaranteeing exactly one side wins simultaneous requests. Power management uses CE and SEM to gate per-port circuitry into low-power standby modes (ISB3 = 1.0 mA typ. full standby).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 4K × 8 bits (4096 words × 8-bit wide), supporting independent dual-port addressing |
| Access time | 35 ns max (tAA, tACE), enabling 28.6 MHz sustained dual-port throughput |
| Supply voltage | 5.0 V ±10%, TTL-compatible I/O levels (VIH = 2.2 V min, VIL = 0.8 V max) |
| Operating temp | 0°C to +70°C (commercial grade), validated for stable timing across full range |
| Standby current | 1.0 mA typical (ISB3, both ports CMOS-disabled), critical for low-power idle states |
| Semaphore count | 8 independent binary flags, accessed via A0–A2 with SEM = VIL, enabling fine-grained resource locking |
| Package | 52-pin PLCC (PLG52), body size 20.0 mm × 20.0 mm × 4.3 mm, lead-free compatible |
Pinout & Package
Package: 52-pin Plastic Leaded Chip Carrier (PLCC), JEDEC MO-052 compliant, body dimensions 20.0 mm × 20.0 mm × 4.3 mm, with 0.65 mm lead pitch and gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A11L | Left port address inputs | 12-bit address bus for left-side memory access; no effect on right port or semaphore space |
| A0R–A11R | Right port address inputs | 12-bit address bus for right-side memory access; fully independent of left port |
| I/O0L–I/O7L | Left port bidirectional data | 8-bit data path for reads/writes; high-impedance when OEL = VIH or CEL = VIH |
| I/O0R–I/O7R | Right port bidirectional data | 8-bit data path for reads/writes; high-impedance when OER = VIH or CER = VIH |
| R/WL / R/WR | Left/right write-enable control | Active-low signal determining direction: LOW = write, HIGH = read (no effect on semaphore) |
| CEL / CER | Left/right chip enable | Active-low enables port access; both HIGH places port in ISB1/ISB2 standby mode |
| OEL / OER | Left/right output enable | Active-low enables data output drivers; controls high-impedance state independently of CE |
| SEML / SEMR | Semaphore flag status outputs | Active-low open-collector outputs indicating current ownership of semaphore flags |
| SEM | Semaphore select | Active-low chip select for semaphore register space (A0–A2 only); disables SRAM access when asserted |
| VCC / GND | Power supply | VCC = 5V ±10% (all VCC pins must be connected); GND = common reference (all GND pins tied) |
Key Features
| Feature | Design Value |
|---|---|
| Fully asynchronous dual-port operation | Independent left/right control allows simultaneous read/write without arbitration delay or wait states |
| Hardware semaphore logic | 8 dedicated binary flags with atomic set/test capability, resolving simultaneous claims deterministically |
| Low-power standby modes | Four distinct standby currents (ISB1–ISB4) down to 1.0 mA typ., enabling granular power gating per port |
| TTL-compatible interface | Direct connection to legacy 5V microcontrollers and FPGAs without level-shifting circuitry |
| PLCC-52 packaging | Robust, socket-compatible footprint with thermal performance suitable for convection-cooled industrial PCBs |
Applications
| Industrial Motion Controller | Real-Time Data Acquisition System |
|---|---|
|
Use Scenario: Two DSPs coordinate motor position updates and sensor feedback in closed-loop servo drives. IC Role / Device Role / Timing Role: Dual-port RAM serves as shared buffer for position commands and encoder counts; semaphores arbitrate write access to prevent overwrites. Use Value: 35 ns access ensures sub-microsecond interprocessor handshaking, eliminating jitter in 20 kHz PWM control loops. |
Use Scenario: FPGA-acquired analog samples and ARM processor logging share timestamped waveform buffers. IC Role / Device Role / Timing Role: Left port accepts streaming ADC data; right port services host reads; semaphores lock buffer segments during DMA transfers. Use Value: Hardware semaphore eliminates software polling overhead, reducing CPU load by >15% in continuous 1 MS/s acquisition. |
| Avionics Display Processor | Medical Imaging Subsystem |
|
Use Scenario: Safety-critical graphics engine and flight management unit exchange navigation overlays and symbology data. IC Role / Device Role / Timing Role: IDT71342SA35JI8 provides deterministic latency for overlay buffer writes and reads across redundant processing paths. Use Value: Guaranteed 35 ns max access and zero-wait-state arbitration meet DO-254 timing closure requirements for Level A systems. |
Use Scenario: Ultrasound beamformer FPGA and image reconstruction CPU share raw RF data frames before FFT processing. IC Role / Device Role / Timing Role: Dual-port RAM acts as ping-pong buffer; semaphores coordinate frame ownership transitions without data corruption. Use Value: Atomic semaphore flag updates ensure lossless frame handoff at 120 fps, meeting IEC 62304 Class C data integrity mandates. |
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 |
|---|---|---|---|
| CY7C1352BV33-100AXC | 3.3V core, 100 MHz max (10 ns access), 64-pin TQFP only; no battery backup support | Requires level translation for 5V systems; higher speed suits newer FPGA-based designs | Choose when migrating to 3.3V infrastructure and needing faster timing margins |
| IDT71342LA35JI8 | Same speed (35 ns), but industrial temp (−40°C to +85°C) and 2V data retention in LA variant | Validated for extended temperature environments; supports battery-backed retention during main power loss | Choose when operating outside 0°C–70°C range or requiring non-volatile data hold during brownouts |
Compared with CY7C1352BV33-100AXC and IDT71342LA35JI8, the IDT71342SA35JI8 offers optimal fit for cost-sensitive commercial-grade 5V systems where deterministic 35 ns dual-port latency and PLCC-52 socketability are prioritized over voltage scaling or extended temperature operation.
Availability
IDT71342SA35JI8 is available at Aetrix Electronics and suitable for industrial motion controllers, real-time data acquisition systems, avionics display processors, and medical imaging subsystems requiring stable component supply with traceable sourcing and long-term lifecycle support.
Supply support for IDT71342SA35JI8 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.
IDT71342SA35JI8 belongs to IDT's legacy dual-port SRAM product line, engineered specifically for deterministic interprocessor communication in real-time embedded systems where hardware semaphore arbitration eliminates software overhead and timing uncertainty.
FAQ
What is the maximum guaranteed access time for IDT71342SA35JI8?
The IDT71342SA35JI8 has a maximum guaranteed access time of 35 ns for both address access (tAA) and chip enable access (tACE), measured under commercial temperature conditions (0°C to +70°C) with VCC = 5.0 V ±10%. This value is production-tested and specified in the official IDT datasheet DSC 2621/16.
Does IDT71342SA35JI8 support battery backup operation?
No, IDT71342SA35JI8 does not support battery backup operation. Battery backup with 2V data retention is exclusive to the LA variant (e.g., IDT71342LA35JI8). The SA suffix denotes standard power consumption without retention capability below 4.5V.
How many semaphore flags does IDT71342SA35JI8 provide, and how are they addressed?
IDT71342SA35JI8 provides eight independent binary semaphore flags, accessed exclusively via address lines A0–A2 while SEM = VIL. Only I/O0 is used for writing semaphore values; reads return the flag state across all eight I/O lines (00H or FFH).
What package type is used for IDT71342SA35JI8?
IDT71342SA35JI8 is packaged in a 52-pin Plastic Leaded Chip Carrier (PLCC), designated PLG52 per IDT documentation. Pin layout matches the top-view diagram in datasheet Figure 2, with N/C pins at positions 1, 46, and 47.
Can both ports of IDT71342SA35JI8 perform simultaneous read/write operations on the same memory location?
No - simultaneous read/write to the same non-semaphore memory location causes undefined data. The IDT71342SA35JI8 permits concurrent access only to *different* addresses. Semaphore flags are protected against conflict, but main memory requires software coordination or address partitioning to avoid corruption.
71342SA35JI8 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:
- 35ns
- Access Time:
- 35 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)
71342SA35JI8 FAQ
1.How can I place an order for 71342SA35JI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 71342SA35JI8 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 71342SA35JI8 reliable?
The price and inventory of 71342SA35JI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71342SA35JI8 is usually 5 days.
3.What payment methods are accepted for 71342SA35JI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71342SA35JI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71342SA35JI8?
71342SA35JI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71342SA35JI8 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 71342SA35JI8?
For technical support, including 71342SA35JI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71342SA35JI8 requirements.
6.How does Aetrix verify that 71342SA35JI8 is sourced from the original manufacturer or authorized distributors?
All 71342SA35JI8 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 71342SA35JI8 meets industry standards.
7.What is the process for return or replacement of 71342SA35JI8?
All 71342SA35JI8 units undergo pre-shipment inspection (PSI). If there is an issue with 71342SA35JI8, 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 71342SA35JI8 part is unused and in its original packaging.
Return procedure for 71342SA35JI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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