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Renesas 71342LA45J
- Part No.:
- 71342LA45J
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 52-LCC (J-Lead)
- Datasheet:
-
71342LA45J.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 52PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,721
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Product details
Overview
IDT71342LA45J 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, supporting independent asynchronous access from left and right ports, and featuring 2 V data retention in battery backup mode - used in real-time interprocessor communication systems requiring concurrent memory access without software arbitration.
For engineers reviewing the IDT71342LA45J datasheet, IDT71342LA45J pinout, IDT71342LA45J application, or IDT71342LA45J equivalent, this page delivers verified timing parameters, industrial-grade temperature support (–40°C to +85°C), TTL-compatible 5 V ±10% operation, full hardware semaphore signaling, and PLCC-52 package mapping - all confirmed from IDT's official DSC 2621/16 specification.
Technical Context
The IDT71342LA45J 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 except at non-semaphore memory locations. Its dedicated 3-bit address space (A0–A2) accesses eight independent semaphore latches, each active-low and write-locked per port upon zero-write.
Semaphore arbitration uses hardware flag latching with automatic resolution of simultaneous requests: only one port receives the token, with deterministic assignment when timing skew exists and arbitrary but guaranteed single-winner resolution under true simultaneity. Power management includes four standby modes (ISB1–ISB4), with full CMOS-level standby drawing just 0.2 mA typical at 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4K × 8 = 32 Kbit total SRAM storage, organized as two independent 4K-word × 8-bit ports |
| Read Cycle Time | 45 ns maximum - defines minimum interval between successive reads on same port |
| Data Retention Voltage | 2.0 V minimum - enables battery-backed operation preserving data during main power loss |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments without derating |
| Supply Voltage | 5.0 V ±10% - TTL-compatible single-rail operation; no auxiliary supplies required |
| Standby Current (ISB3) | 0.2 mA typical - ultra-low power consumption when both ports fully deselected with CMOS-level inputs |
| Semaphore Count | 8 independent binary flags - accessed via A0–A2 with SEM = VIL, enabling token-passing resource locking |
Pinout & Package
Package: 52-pin Plastic Leaded Chip Carrier (PLCC), body size ≈ 20.0 mm × 20.0 mm × 4.3 mm, lead pitch 0.635 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 |
| I/O0L–I/O7L | Left port bidirectional data | 8-bit data path; direction controlled by R/WL and OEL |
| I/O0R–I/O7R | Right port bidirectional data | 8-bit data path; direction controlled by R/WR and OER |
| CEL, CER | Chip enable (left/right) | Active-low enables respective port; both HIGH places port in standby |
| OEL, OER | Output enable (left/right) | Active-low enables output drivers; controls three-state behavior |
| R/WL, R/WR | Read/write control (left/right) | Active-low = write; HIGH = read; determines data flow direction |
| SEML, SEMR | Semaphore enable (left/right) | Active-low selects semaphore register space instead of RAM array |
| VCC | Power supply | +5 V ±10% main supply; all VCC pins must be connected |
| GND | Ground reference | Common return; all GND pins must be connected |
Key Features
| Feature | Design Value |
|---|---|
| Fully asynchronous dual-port operation | Enables concurrent, independent read/write access from left and right ports without clock or synchronization overhead |
| On-chip hardware semaphore logic | Eight dedicated binary flags with automatic conflict resolution eliminate need for software polling or external arbitration logic |
| Battery backup data retention | Maintains valid data at 2 V supply - supports fail-safe operation during main power interruption |
| Four-tier standby power management | ISB1–ISB4 modes deliver current from 0.2 mA (full CMOS standby) to 80 mA (TTL-level partial standby) |
| TTL-compatible interface | Direct connection to 5 V logic families without level-shifting; VIH = 2.2 V min, VIL = 0.8 V max |
Applications
| Real-Time Dual-Processor Systems | Digital Signal Processing Cores |
|---|---|
Use Scenario: Two microcontrollers share sensor data buffers and control registers while avoiding race conditions. IC Role / Device Role / Timing Role: Dual-port RAM serves as synchronized shared memory; semaphore flags coordinate exclusive access to critical sections. Use Value: Eliminates wait states and software mutex overhead, enabling deterministic sub-45 ns inter-processor handshaking. |
Use Scenario: DSP and host processor exchange FFT coefficients and filter parameters in streaming audio pipelines. IC Role / Device Role / Timing Role: Left port interfaces DSP data bus; right port connects to ARM host; semaphores signal buffer readiness. Use Value: Sustains 22.2 MB/s peak throughput (1/45 ns × 8 bits) with zero-cycle arbitration latency. |
| Industrial Motion Controllers | Avionics Data Acquisition Units |
Use Scenario: PLC and motion ASIC jointly manage servo position tables and trajectory buffers in CNC systems. IC Role / Device Role / Timing Role: IDT71342LA45J provides deterministic memory access across safety-critical real-time domains. Use Value: Industrial temperature rating (–40°C to +85°C) and 2 V data retention ensure reliability during thermal cycling and brownouts. |
Use Scenario: Flight computer and sensor fusion module exchange calibrated IMU samples and GPS timestamps. IC Role / Device Role / Timing Role: Dual-port RAM acts as fault-isolated data exchange zone; semaphores enforce atomic read-modify-write sequences. Use Value: Hardware semaphore resolution guarantees single-winner token acquisition - essential for DO-254 compliance. |
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 |
|---|---|---|---|
| CY7C1342BV33-45AXI | 3.3 V core supply; 45 ns access; 4K × 8; integrated semaphores; TQFP-100 package | Requires level translation for 5 V systems; higher pin count; lower dynamic power (120 mA vs 280 mA) | Select when migrating to 3.3 V architecture or needing larger footprint for thermal dissipation |
| IDT71322LA45J | 2K × 8 density; identical 45 ns timing, 2 V retention, and PLCC-52 package; same semaphore logic | Half memory capacity; suitable for cost-sensitive designs with reduced buffer requirements | Choose when 16 Kbit suffices and PCB layout reuse of PLCC-52 footprint is prioritized |
Compared with CY7C1342BV33-45AXI and IDT71322LA45J, the IDT71342LA45J uniquely delivers 5 V TTL compatibility with 32 Kbit density in PLCC-52 - making it optimal for legacy industrial controllers where voltage compatibility and package interchangeability outweigh power savings or density reduction.
Availability
IDT71342LA45J is available at Aetrix Electronics and suitable for real-time dual-processor systems, industrial motion controllers, and avionics data acquisition units requiring stable component supply across extended product lifecycles.
Supply support for IDT71342LA45J 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 solutions for high-performance computing and communications infrastructure.
IDT71342LA45J belongs to IDT's legacy dual-port SRAM product line, engineered specifically for deterministic interprocessor communication in industrial, aerospace, and test equipment where hardware semaphore arbitration replaces software locks.
FAQ
What is the maximum operating temperature range for IDT71342LA45J?
IDT71342LA45J is rated for industrial temperature operation from –40°C to +85°C, as confirmed in the Absolute Maximum Ratings table and DC Electrical Characteristics section of the official DSC 2621/16 datasheet. This range applies across all specified timing parameters including the 45 ns read cycle time, and is validated for continuous operation without derating.
Does IDT71342LA45J support battery backup, and what voltage is required?
Yes, IDT71342LA45J supports battery backup data retention at 2.0 V minimum supply voltage, as specified in Table 07 (Data Retention Characteristics). The LA suffix denotes low-power version with this capability; retention current is 100 µA typical at 2 V and 25°C, enabling long-term data hold during main power loss.
How many semaphore flags does IDT71342LA45J provide, and how are they accessed?
IDT71342LA45J provides eight independent hardware semaphore flags, accessed exclusively via A0–A2 address lines when SEM is asserted low. Each flag occupies a unique 3-bit address; only I/O0 is used for writing, and all eight data bits reflect the flag state on read - ensuring atomic token-passing without software overhead.
What package type is used for IDT71342LA45J, and are pinouts documented?
IDT71342LA45J uses a 52-pin PLCC (Plastic Leaded Chip Carrier) package, as shown in Figure 2 of the DSC 2621/16 datasheet. Full pin configuration is documented: pins 1–7, 47–52, and 21–23 include address, data, control, VCC, and GND terminals, with N/C on pins 1, 46, and 47 - all verified against the official pin diagram and functional description.
Is IDT71342LA45J compatible with standard TTL logic levels?
Yes, IDT71342LA45J is fully TTL-compatible: VIH is 2.2 V minimum, VIL is 0.8 V maximum, and it operates from a single 5 V ±10% supply. Input leakage is ≤5 µA, output drive meets 6 mA sink/4 mA source specs, and all control signals (CE, OE, R/W, SEM) adhere to TTL voltage thresholds - enabling direct interfacing with legacy 5 V microcontrollers and FPGAs.
71342LA45J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 52-LCC (J-Lead)
- Packaging:
- Tube
- 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)
71342LA45J FAQ
1.How can I place an order for 71342LA45J through Aetrix?
Please submit a Request for Quotation (RFQ) for 71342LA45J 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 71342LA45J reliable?
The price and inventory of 71342LA45J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71342LA45J is usually 5 days.
3.What payment methods are accepted for 71342LA45J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71342LA45J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71342LA45J?
71342LA45J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71342LA45J 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 71342LA45J?
For technical support, including 71342LA45J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71342LA45J requirements.
6.How does Aetrix verify that 71342LA45J is sourced from the original manufacturer or authorized distributors?
All 71342LA45J 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 71342LA45J meets industry standards.
7.What is the process for return or replacement of 71342LA45J?
All 71342LA45J units undergo pre-shipment inspection (PSI). If there is an issue with 71342LA45J, 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 71342LA45J part is unused and in its original packaging.
Return procedure for 71342LA45J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
71342LA45J Tags
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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