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Renesas 71342SA55PF
- Part No.:
- 71342SA55PF
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 64-LQFP
- Datasheet:
-
71342SA55PF.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,970
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Product details
Overview
IDT71342SA55PF from Integrated Device Technology is a high-speed 4K × 8 dual-port static RAM with on-chip semaphore logic, operating at 55 ns read/write cycle time, supporting independent asynchronous access from left and right ports, and featuring TTL-compatible 5 V ±10% supply - used in real-time interprocessor communication systems requiring concurrent memory access control.
For engineers reviewing the IDT71342SA55PF datasheet, IDT71342SA55PF pinout, IDT71342SA55PF application, or IDT71342SA55PF equivalent, key selection criteria include dual-port timing (tRC = 55 ns), semaphore flag arbitration latency (tSOP = 20 ns), industrial-grade temperature support (–40°C to +85°C), and PLCC-52 package compatibility for legacy embedded controller designs.
Technical Context
The IDT71342SA55PF implements fully asynchronous dual-port architecture with separate address, data, and control buses per port (A0L–A11L/I/O0L–I/O7L/R/WL/CEL/OEL/SEML and A0R–A11R/I/O0R–I/O7R/R/WR/CER/OER/SEMR), enabling simultaneous read/write operations without bus contention except at non-semaphore memory locations. Its semaphore block contains eight independent latches accessible via A0–A2 with SEM pin activation.
It uses CMOS process technology with automatic power-down controlled by CE and SEM inputs: when both are HIGH, the device enters full standby mode (ISB3 ≤ 4.0 mA typ.); battery backup data retention (2 V) applies only to LA variants, not this SA-grade part. The 55 ns speed grade is validated for commercial and industrial temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 8 bits (4096 words × 8-bit wide), dual-port SRAM with dedicated 3-bit address space (A0–A2) for 8 semaphore flags |
| Access Time (tAA) | 55 ns max - defines minimum address setup-to-data-valid delay for reliable read timing in high-throughput controllers |
| Read Cycle Time (tRC) | 55 ns max - determines maximum sustained read throughput (≈18.2 MHz) without cycle overlap violation |
| Write Pulse Width (tWP) | 50 ns min - ensures stable write data capture during R/W-controlled or CE-controlled write cycles |
| Supply Voltage | 5.0 V ±10% - compatible with legacy TTL logic families and eliminates need for level-shifting in 5 V systems |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including motor control, PLCs, and telecom line cards |
| Standby Current (ISB1) | 40 mA max (both ports TTL-level standby) - enables low-power idle states while retaining full port readiness |
Pinout & Package
Package: 52-pin Plastic Leaded Chip Carrier (PLCC), body size ≈ 20.0 mm × 20.0 mm × 4.3 mm, lead pitch 0.65 mm, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 47–52 | GND / VCC / N/C | Pin 1 = GND; Pins 47–52 = VCC (must all be connected); N/C pins (e.g., Pin 46) are no-connect, not to be tied |
| A0L–A11L, A0R–A11R | Address Inputs | Left port: A0L–A11L (12-bit, 4K addressing); Right port: A0R–A11R - fully independent, no shared lines |
| I/O0L–I/O7L, I/O0R–I/O7R | Bidirectional Data Bus | 8-bit parallel I/O per port; high-impedance when OE inactive or CE HIGH; no internal bus contention |
| R/WL, R/WR | Write Enable Control | Active LOW; controls direction of data flow per port - LOW = write, HIGH = read (output enabled if OE active) |
| CEL, CER | Chip Enable | Active LOW per port; disables memory array and I/O drivers when HIGH, entering standby (ISB1/ISB2 modes) |
| OEL, OER | Output Enable | Active LOW per port; enables output drivers independently of CE - allows read-only enable without full port activation |
| SEML, SEMR | Semaphore Select | Active LOW; enables access to 8 semaphore latches (A0–A2 only); writing D0=0 claims token, D0=1 releases it |
Key Features
| Feature | Design Value |
|---|---|
| Fully asynchronous dual-port operation | Enables true concurrent access - left and right ports operate independently with no arbitration overhead or wait states |
| On-chip hardware semaphore logic | Eight dedicated binary flags with atomic claim/release via SEM-controlled address space (A0–A2), eliminating software-only spinlock latency |
| 55 ns read/write cycle time | Supports real-time interprocessor messaging in systems with sub-100 ns timing budgets, e.g., motion control and packet buffering |
| TTL-compatible 5 V interface | Direct connection to legacy microcontrollers (e.g., 80C51, 68HC11), FPGAs, and ASICs without level translation circuitry |
| Industrial temperature qualification | Validated operation from –40°C to +85°C ensures reliability in uncontrolled enclosures, factory automation, and outdoor base stations |
Applications
| Industrial Motion Controller | Telecom Line Card Buffer |
|---|---|
Use Scenario: Two DSPs coordinate servo positioning - one handles trajectory planning, the other executes real-time PWM updates. IC Role / Device Role / Timing Role: IDT71342SA55PF serves as shared memory with hardware semaphore arbitration, enabling lock-free exchange of position setpoints and status flags. Use Value: Eliminates CPU polling delays; 55 ns tRC ensures <100 ns round-trip data handoff, meeting 10 kHz servo loop timing constraints. |
Use Scenario: Dual-processor architecture in T1/E1 framer card - one processor manages HDLC framing, the other handles alarm reporting and statistics. IC Role / Device Role / Timing Role: IDT71342SA55PF provides synchronized buffer access between processors, with semaphores coordinating frame descriptor ownership. Use Value: Prevents descriptor corruption during concurrent read/write; tSOP = 20 ns guarantees deterministic flag update within framing overhead budget. |
| Avionics Display Processor | Medical Imaging Data Pipeline |
Use Scenario: Safety-critical cockpit display system with primary graphics processor and redundant monitoring processor sharing rendering buffers. IC Role / Device Role / Timing Role: IDT71342SA55PF acts as fault-tolerant shared memory with semaphore-based resource locking for overlay layer management. Use Value: Enables failover without memory inconsistency; industrial temp rating supports extended operation in non-climate-controlled avionics bays. |
Use Scenario: Real-time ultrasound image reconstruction pipeline - FPGA acquires raw RF data, ARM processor performs beamforming and display rendering. IC Role / Device Role / Timing Role: IDT71342SA55PF buffers intermediate scan-line data with semaphore-controlled handoff between acquisition and processing domains. Use Value: 55 ns tRC sustains >18 MByte/s sustained bandwidth; eliminates DMA stalls during high-frame-rate imaging (≥60 fps). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C1355KV18-55BGXI | 18-bit bus width, 512K × 18 organization, 55 ns access, QDR-II+ interface, 1.8 V core / 3.3 V I/O | Targeted at high-bandwidth networking ASICs; lacks integrated semaphore logic - requires external arbitration logic | Choose for wider data paths and higher density; avoid when semaphore-assisted interprocessor sync is required without added logic. |
| IDT71V3577SA55BQI | Same 4K × 8 organization and 55 ns speed, but 64-pin TQFP package and LVCMOS (3.3 V) interface | Requires level-shifting in 5 V systems; no PLCC-52 footprint compatibility; identical semaphore functionality | Choose for new 3.3 V designs with PCB space constraints; avoid for drop-in replacement in existing PLCC-52 layouts. |
Compared with CY7C1355KV18-55BGXI and IDT71V3577SA55BQI, the IDT71342SA55PF uniquely delivers 5 V TTL compatibility, PLCC-52 footprint, and integrated semaphore logic in a single chip - critical for cost-sensitive, legacy 5 V industrial controllers where board real estate and external logic count matter.
Availability
IDT71342SA55PF is available at Aetrix Electronics and suitable for industrial motion controllers, telecom line cards, avionics display processors, and medical imaging pipelines requiring stable component supply across long product lifecycles.
Supply support for IDT71342SA55PF 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.
The IDT71342 product line was designed for real-time embedded systems requiring deterministic interprocessor communication - specifically targeting dual-CPU architectures in industrial automation, telecom, and aerospace where hardware semaphore arbitration reduces software complexity and jitter.
FAQ
What is the maximum operating temperature range for the IDT71342SA55PF?
The IDT71342SA55PF is rated for industrial temperature operation from –40°C to +85°C. This specification is validated per manufacturer test conditions and applies across all DC and AC electrical parameters in the datasheet. The IDT71342SA55PF maintains full timing compliance (tRC ≤ 55 ns, tAA ≤ 55 ns) and functional integrity within this range, making it suitable for deployment in non-climate-controlled factory or outdoor telecom environments.
Does the IDT71342SA55PF support battery backup data retention?
No, the IDT71342SA55PF does not support battery backup data retention. That feature is exclusive to the LA variant (e.g., IDT71342LA55PF), which specifies VDR = 2.0 V and ICCDR ≤ 1500 µA. The SA suffix denotes standard power grade with active current optimized for performance, not low-voltage retention. The IDT71342SA55PF requires continuous 5 V ±10% supply for data retention.
How many semaphore flags does the IDT71342SA55PF provide, and how are they accessed?
The IDT71342SA55PF provides eight independent hardware semaphore flags, each implemented as a binary latch. They are accessed exclusively through the SEM pin (active LOW) combined with address lines A0–A2 - only these three bits decode the semaphore space. All other address lines (A3–A11) are ignored during semaphore access. Writing I/O0 = 0 claims the flag; writing I/O0 = 1 releases it. The IDT71342SA55PF reads flag state across all I/O pins (I/O0–I/O7) simultaneously.
Is the IDT71342SA55PF pin-compatible with other members of the IDT71342 family?
The IDT71342SA55PF in PLCC-52 package shares identical pinout with all other PLCC-52 variants of the IDT71342 family (e.g., IDT71342SA20PF, IDT71342LA55PF). Pin functions, voltage tolerances, and timing relationships are preserved across speed grades and power variants within the same package type. However, it is not pin-compatible with the 64-pin TQFP versions (e.g., IDT71342SA55PFG), which have different pin assignments and additional N/C pins.
What is the meaning of "SA" in the IDT71342SA55PF part number?
The "SA" in IDT71342SA55PF denotes Standard Power grade - indicating typical active current consumption (ICC ≈ 240 mA max at fMAX) and absence of battery backup capability. It distinguishes the part from the "LA" (Low Power) variant, which offers reduced standby current (ISB3 ≤ 4.0 mA typ.) and 2 V data retention. The "55" specifies 55 ns read cycle time, and "PF" indicates PLCC-52 packaging. The IDT71342SA55PF is optimized for performance in continuously powered industrial systems.
71342SA55PF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 64-LQFP
- Packaging:
- Tray
- 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:
- 64-TQFP (14x14)
71342SA55PF FAQ
1.How can I place an order for 71342SA55PF through Aetrix?
Please submit a Request for Quotation (RFQ) for 71342SA55PF 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 71342SA55PF reliable?
The price and inventory of 71342SA55PF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71342SA55PF is usually 5 days.
3.What payment methods are accepted for 71342SA55PF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71342SA55PF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71342SA55PF?
71342SA55PF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71342SA55PF 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 71342SA55PF?
For technical support, including 71342SA55PF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71342SA55PF requirements.
6.How does Aetrix verify that 71342SA55PF is sourced from the original manufacturer or authorized distributors?
All 71342SA55PF 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 71342SA55PF meets industry standards.
7.What is the process for return or replacement of 71342SA55PF?
All 71342SA55PF units undergo pre-shipment inspection (PSI). If there is an issue with 71342SA55PF, 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 71342SA55PF part is unused and in its original packaging.
Return procedure for 71342SA55PF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
71342SA55PF Tags
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