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Renesas 71342LA45J8
- Part No.:
- 71342LA45J8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 52-LCC (J-Lead)
- Datasheet:
-
71342LA45J8.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 52PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,874
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Product details
Overview
IDT71342LA45J8 from Integrated Device Technology is a high-speed 4K × 8 dual-port static RAM with on-chip semaphore logic, operating at 45 ns max read cycle time, 5 V ±10% supply, and industrial temperature range (–40°C to +85°C). It supports fully asynchronous independent access from left and right ports and enables interprocessor resource arbitration in real-time embedded control systems.
For engineers reviewing the IDT71342LA45J8 datasheet, IDT71342LA45J8 pinout, IDT71342LA45J8 application, or IDT71342LA45J8 equivalent, this device delivers deterministic port-to-port timing, battery-backed data retention down to 2 V, and hardware semaphore flag management for conflict-free shared memory access in multi-CPU architectures.
Technical Context
The IDT71342LA45J8 implements two fully independent CMOS SRAM ports with separate address, data, and control lines-A0L–A11L/I/O0L–I/O7L/R/WL/CEL/OEL/SEML on the left and A0R–A11R/I/O0R–I/O7R/R/WR/CER/OER/SEMR on the right. Each port operates asynchronously without mutual timing dependency.
Semaphore logic resides in a dedicated 8-location address space (A0–A2 only), accessed via SEM = VIL while CE = VIH; writes use I/O0 only, reads replicate flag state across all eight I/O pins. Flag arbitration guarantees exclusive token assignment even under simultaneous write requests.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 8 bits (4096 words × 8-bit wide), dual-port architecture with physically separate left/right I/O paths |
| Access Time (tRC) | 45 ns maximum - defines minimum cycle time for reliable read operations at full speed |
| Supply Voltage | 5.0 V ±10% - TTL-compatible single-supply operation; no level-shifting required in 5 V systems |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including motor control and factory automation |
| Data Retention Voltage | 2.0 V minimum - enables battery backup operation with ultra-low standby current (100 µA typ.) |
| Standby Current (ISB3) | 0.2 mA typical - achieved when both ports are disabled with CMOS-level inputs (CE > VCC − 0.2 V) |
| Input/Output Compatibility | TTL input thresholds (VIH = 2.2 V min, VIL = 0.8 V max) and output drive (VOH = 2.4 V min at –4 mA, VOL = 0.4 V max at 6 mA) |
Pinout & Package
Package: 64-pin TQFP (PNG64), 14 mm × 14 mm × 1.4 mm body, lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A11L | Left port address inputs | 12-bit address bus for left-side memory access; A0L–A11L map directly to 4K address space |
| A0R–A11R | Right port address inputs | 12-bit address bus for right-side memory access; fully independent of left port addressing |
| I/O0L–I/O7L | Left port bidirectional data | 8-bit parallel data path; high-impedance when OEL = VIH or CEL = VIH |
| I/O0R–I/O7R | Right port bidirectional data | 8-bit parallel data path; isolated from left port I/O to prevent contention |
| R/WL / R/WR | Left/right write enable | Active-low control: LOW enables write, HIGH enables read (no separate OE needed for read direction) |
| CEL / CER | Left/right chip enable | Active-low enables port operation; HIGH places port in low-power standby (ISB1–ISB4 modes) |
| OEL / OER | Left/right output enable | Active-low controls I/O drivers; allows read data output while write is disabled |
| SEML / SEMR | Left/right semaphore select | Active-low enables semaphore register access (A0–A2 only); disables SRAM access when asserted |
| VCC | Power supply | 5 V ±10% main supply; all VCC pins must be connected and decoupled locally |
| GND | Ground reference | Common ground for all signals; all GND pins must be connected to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Fully asynchronous dual-port operation | Enables concurrent read/write from left and right ports without arbitration delay or wait states |
| On-chip hardware semaphore logic | Eight dedicated binary flags with atomic set/test capability prevent race conditions during interprocessor resource locking |
| Battery backup data retention | Retains memory contents at 2 V supply with ≤1500 µA ICCDR - supports nonvolatile operation during main power loss |
| Low-power standby modes | Four ISB modes (ISB1–ISB4) allow granular power gating per port or globally, down to 0.2 mA typical |
| TTL-compatible interface | Eliminates need for level translators in legacy 5 V microcontroller or DSP systems |
Applications
| Industrial Motion Control | Real-Time Communication Bridge |
|---|---|
Use Scenario: Two independent motion controllers coordinate axis positioning using shared trajectory buffers and status registers. IC Role / Device Role / Timing Role: Dual-port SRAM serves as zero-latency shared memory; semaphores lock buffer segments during update cycles. Use Value: Eliminates software polling or external arbitration logic; ensures deterministic <45 ns inter-processor data exchange. |
Use Scenario: A fieldbus master (e.g., CANopen) and application processor exchange configuration and diagnostics over a common memory region. IC Role / Device Role / Timing Role: IDT71342LA45J8 acts as a hardware-synchronized mailbox with semaphore-controlled access windows. Use Value: Prevents data corruption during concurrent read/write; supports burst transfers without CPU intervention or DMA stalls. |
| Redundant Safety PLC | Dual-Core Embedded Instrumentation |
Use Scenario: Primary and backup safety processors maintain mirrored I/O states and cross-validate outputs before actuation. IC Role / Device Role / Timing Role: IDT71342LA45J8 provides fault-tolerant shared memory with independent port monitoring and watchdog-triggered semaphore release. Use Value: Enables sub-microsecond state synchronization and automatic failover coordination without external logic. |
Use Scenario: ARM Cortex-M7 and RISC-V co-processor share sensor fusion results and calibration tables in real time. IC Role / Device Role / Timing Role: Dual-port RAM functions as low-overhead inter-core communication channel with hardware semaphore-based critical section protection. Use Value: Reduces inter-core latency by >90% vs. message-passing APIs; eliminates cache coherency overhead in heterogeneous SoC designs. |
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 |
|---|---|---|---|
| CY7C1355BV33-100AXC | 3.3 V supply, 100 MHz (10 ns) access, 8K × 16 organization, no battery retention | Requires level-shifting in 5 V systems; larger memory but incompatible voltage domain | Select when migrating to 3.3 V platforms and higher bandwidth is prioritized over data retention |
| IDT71322LA25J8 | 2K × 8 organization, 25 ns access, same 5 V/industrial spec and semaphore architecture | Half memory depth; suitable for cost-sensitive or space-constrained designs with lower buffer requirements | Choose when 2K capacity suffices and faster timing (25 ns) is needed without changing footprint or firmware |
Compared with CY7C1355BV33-100AXC and IDT71322LA25J8, the IDT71342LA45J8 uniquely balances industrial-grade 5 V operation, 4K depth, 45 ns timing, and 2 V battery retention-making it optimal for legacy 5 V safety-critical systems requiring nonvolatile shared memory.
Availability
IDT71342LA45J8 is available at Aetrix Electronics and suitable for industrial motion control, redundant safety PLCs, real-time communication bridges, and dual-core embedded instrumentation requiring stable component supply across extended product lifecycles.
Supply support for IDT71342LA45J8 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 industrial applications.
IDT71342LA45J8 belongs to IDT's legacy dual-port SRAM product line, designed specifically for deterministic interprocessor communication in real-time control systems where hardware semaphore arbitration replaces software-based locking.
FAQ
What is the maximum guaranteed access time for IDT71342LA45J8?
IDT71342LA45J8 has a maximum read cycle time (tRC) of 45 ns across the full industrial temperature range (–40°C to +85°C) and 5 V ±10% supply. This value is production-tested and guaranteed-not a typical or characterization-only figure-and applies to both ports under worst-case voltage and temperature conditions.
Does IDT71342LA45J8 support battery backup operation?
Yes, IDT71342LA45J8 supports battery backup data retention at VCC = 2.0 V minimum, drawing ≤1500 µA typical (ICCDR). This LA-series feature enables nonvolatile memory hold during main power interruption-critical for safety-critical and industrial control applications where state persistence is mandatory.
How are the semaphore flags accessed on IDT71342LA45J8?
Semaphore flags are accessed by asserting SEM = VIL while holding CE = VIH; address decoding uses only A0–A2 (eight locations), and I/O0 carries write data. Reads return the flag state replicated across all eight I/O pins. No other address bits affect semaphore access, and R/W determines direction-LOW for write, HIGH for read.
What package type is used for IDT71342LA45J8?
IDT71342LA45J8 is packaged in a 64-pin TQFP (PNG64) with 14 mm × 14 mm × 1.4 mm dimensions, lead-free and RoHS compliant. Pinout matches the standard IDT71342 family layout for drop-in compatibility with existing PCB footprints designed for the PNG64 variant.
Can both ports of IDT71342LA45J8 operate simultaneously without conflict?
Yes-IDT71342LA45J8 supports true concurrent access: one port may read while the other writes to a different memory location, or both may read independently. Conflict only arises during simultaneous write to the same address (non-semaphore) or simultaneous semaphore request, which the on-chip logic resolves deterministically with guaranteed single-token assignment.
71342LA45J8 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:
- 45ns
- Access Time:
- 45 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)
71342LA45J8 FAQ
1.How can I place an order for 71342LA45J8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 71342LA45J8 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 71342LA45J8 reliable?
The price and inventory of 71342LA45J8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71342LA45J8 is usually 5 days.
3.What payment methods are accepted for 71342LA45J8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71342LA45J8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71342LA45J8?
71342LA45J8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71342LA45J8 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 71342LA45J8?
For technical support, including 71342LA45J8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71342LA45J8 requirements.
6.How does Aetrix verify that 71342LA45J8 is sourced from the original manufacturer or authorized distributors?
All 71342LA45J8 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 71342LA45J8 meets industry standards.
7.What is the process for return or replacement of 71342LA45J8?
All 71342LA45J8 units undergo pre-shipment inspection (PSI). If there is an issue with 71342LA45J8, 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 71342LA45J8 part is unused and in its original packaging.
Return procedure for 71342LA45J8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
71342LA45J8 Tags
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