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Renesas 71342SA55PF8
- Part No.:
- 71342SA55PF8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 64-LQFP
- Datasheet:
-
71342SA55PF8.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,407
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Product details
Overview
IDT71342SA55PF8 from Integrated Device Technology is a high-speed 4K × 8 dual-port static RAM with on-chip semaphore logic, operating at 55 ns read cycle time, supporting independent asynchronous access from left and right ports, and featuring TTL-compatible 5V ±10% supply - used in real-time interprocessor communication systems requiring concurrent memory access without software arbitration.
For engineers reviewing the IDT71342SA55PF8 datasheet, IDT71342SA55PF8 pinout, IDT71342SA55PF8 application, or IDT71342SA55PF8 equivalent, this page delivers verified timing specs (tRC = 55 ns), power behavior (ISB3 = 1.0 mA typical full standby), package mapping (64-pin TQFP), semaphore flag operation (A0–A2 address space, active-low), and validated alternatives for dual-ported memory coherency in embedded multiprocessor designs.
Technical Context
The IDT71342SA55PF8 implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port, enabling simultaneous read/write operations across non-semaphore memory locations. Its dedicated 3-bit address space (A0–A2) selects among eight hardware semaphore latches, each accessible only when SEM = VIH and CE = VIL.
Semaphore logic enforces atomic token-passing via write-zero claim and write-one release, with automatic contention resolution when both ports assert SEM = VIL simultaneously. The device uses CMOS process technology and supports industrial-grade temperature operation (−40°C to +85°C) with 5V ±10% supply, no battery backup (SA variant), and full TTL-level compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 8 bits (32,768 bits total), dual-port SRAM with separate left/right address/data/control paths |
| Read Cycle Time (tRC) | 55 ns maximum - defines minimum interval between successive reads on same port |
| Access Time (tAA) | 55 ns maximum - time from valid address to stable data output under CE/VIL, OE/VIL conditions |
| Full Standby Current (ISB3) | 1.0 mA typical - power consumed when both ports disabled with CMOS-level inputs (VCC − 0.2V or GND) |
| Supply Voltage | 4.5 V to 5.5 V - single TTL-compatible rail; no 3.3V or mixed-voltage support |
| Operating Temperature | −40°C to +85°C - industrial grade rating confirmed for SA/55 speed grade |
| Semaphore Address Space | A0–A2 only - eight dedicated flags accessed exclusively via SEM = VIL, CE = VIH, R/W = VIL/VIH |
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 (4K = 2¹²) |
| A0R–A11R | Right port address inputs | 12-bit address bus for right-side memory access, electrically isolated from left port |
| I/O0L–I/O7L | Left port bidirectional data | 8-bit data path; high-impedance when OE = VIH or CE = VIH |
| I/O0R–I/O7R | Right port bidirectional data | 8-bit data path; independent drive/receive capability per port |
| CEL / CER | Chip enable (left/right) | Active-low enables respective port; deassertion forces standby mode and high-Z I/O |
| OEL / OER | Output enable (left/right) | Active-low enables output drivers; does not affect internal memory state |
| R/WL / R/WR | Read/write control (left/right) | Active-low = write; high = read; controls direction of I/O pins during access |
| SEML / SEMR | Semaphore enable (left/right) | Active-low selects semaphore register space instead of RAM; must be used with CE = VIH |
| VCC | Power supply | Single 5V ±10% supply; all VCC pins must be connected to decoupled 5V rail |
| GND | Ground | Common reference; all GND pins must be connected to low-impedance ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Hardware semaphore logic | Eight independent binary flags with atomic claim/release via write-zero/write-one, resolving simultaneous requests deterministically |
| Asynchronous dual-port operation | No shared clocks or synchronization required; left/right ports operate independently with zero wait states |
| Low-power standby modes | ISB3 = 1.0 mA typical full standby (both ports disabled with CMOS inputs); ISB2 = 75 mA typical one-port active |
| TTL-compatible interface | VIH = 2.2 V min, VIL = 0.8 V max, VOH = 2.4 V min, VOL = 0.4 V max - interoperable with legacy 5V logic families |
| Industrial temperature range | Rated for −40°C to +85°C ambient; validated across full voltage (4.5–5.5 V) and timing (tRC = 55 ns) spec |
Applications
| Real-Time Multiprocessor Control | Digital Signal Processing Cores |
|---|---|
Use Scenario: Two ARM Cortex-M7 cores share sensor fusion data in an autonomous vehicle ECU, requiring lock-free memory exchange without CPU stalls. IC Role / Device Role / Timing Role: Dual-port SRAM serves as coherent shared buffer; semaphore flags coordinate access to FIFOs and configuration registers. Use Value: Eliminates software mutex overhead; tRC = 55 ns enables sub-20 MHz deterministic polling cycles between cores. |
Use Scenario: A TI C66x DSP and FPGA jointly process radar point-cloud data, with the FPGA writing raw samples and DSP reading processed frames. IC Role / Device Role / Timing Role: IDT71342SA55PF8 provides zero-latency memory bridge; left port connects to FPGA AXI, right port to DSP EMIF. Use Value: Asynchronous operation avoids clock domain crossing logic; 55 ns tAA ensures DSP read latency remains below 60 ns. |
| Industrial PLC Communication Modules | Avionics Data Concentrators |
Use Scenario: Redundant safety controllers in a programmable logic controller exchange status and command packets over a shared memory region. IC Role / Device Role / Timing Role: IDT71342SA55PF8 acts as fault-tolerant interlock buffer; semaphores enforce mutual exclusion on critical I/O update sequences. Use Value: Hardware arbitration prevents race conditions during hot-swappable module insertion; ISB3 < 1.5 mA reduces thermal load in sealed enclosures. |
Use Scenario: ARINC 664 (AFDX) end systems aggregate data from multiple Line Replaceable Units (LRUs), requiring deterministic memory handoff between network and application processors. IC Role / Device Role / Timing Role: Dual-port RAM buffers packet descriptors; semaphore flags signal descriptor readiness and ownership transfer. Use Value: tSWR = 10 ns SEM flag write-to-read ensures sub-microsecond coordination; −40°C to +85°C rating meets DO-160E environmental requirements. |
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 |
|---|---|---|---|
| CY7C024AV-55AXC | 55 ns tRC, 4K × 16 organization, 3.3V supply only, no built-in semaphore logic (requires external logic or firmware arbitration) | Requires external semaphore implementation; better suited for wider data paths but lacks hardware token passing | Select when 16-bit data bus is needed and system can implement software semaphores or add discrete arbitration logic. |
| IDT71322LA55PF8 | Same 55 ns speed, 2K × 8 organization, LA variant with 2V data retention, identical pinout and semaphore architecture | Half memory depth; battery backup support adds complexity for non-battery systems | Choose only if 2K capacity suffices and data retention during power loss is required; otherwise IDT71342SA55PF8 offers optimal balance of size, speed, and simplicity. |
Compared with CY7C024AV-55AXC and IDT71322LA55PF8, the IDT71342SA55PF8 uniquely delivers 4K × 8 capacity, 5V TTL compatibility, and integrated hardware semaphores in a single 64-pin TQFP - eliminating external arbitration components and simplifying design for industrial multiprocessor systems where deterministic, low-overhead resource sharing is mandatory.
Availability
IDT71342SA55PF8 is available at Aetrix Electronics and suitable for real-time multiprocessor control, digital signal processing cores, industrial PLC communication modules, and avionics data concentrators requiring stable component supply across extended product lifecycles.
Supply support for IDT71342SA55PF8 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 communications infrastructure.
IDT71342SA55PF8 belongs to IDT's legacy dual-port SRAM product line, designed specifically for deterministic interprocessor communication in industrial, aerospace, and telecom systems where hardware-enforced memory coherency eliminates software arbitration bottlenecks.
FAQ
What is the maximum operating temperature range for IDT71342SA55PF8?
IDT71342SA55PF8 is rated for industrial temperature operation from −40°C to +85°C. This specification is validated across all electrical parameters including tRC = 55 ns, ISB3 ≤ 1.5 mA, and VIH/VIL thresholds, ensuring reliable dual-port functionality in harsh environments such as factory automation controllers and avionics subsystems.
Does IDT71342SA55PF8 support battery backup for data retention?
No, IDT71342SA55PF8 does not support battery backup. It is the SA (standard power) variant; only the LA variant (e.g., IDT71342LA55PF8) provides 2V data retention capability. The SA version draws ISB3 = 1.0 mA typical in full standby and requires continuous 5V supply to maintain memory contents.
How are the semaphore flags addressed and controlled in IDT71342SA55PF8?
Semaphore flags in IDT71342SA55PF8 are accessed using A0–A2 only, with SEM = VIL and CE = VIH. Writing a zero to D0 sets the flag (claim token); writing a one releases it. All eight flags reside in a dedicated address space separate from main RAM, and reads return the flag state across all I/O pins (0x00 or 0xFF).
What is the pin compatibility between IDT71342SA55PF8 and IDT71342LA55PF8?
IDT71342SA55PF8 and IDT71342LA55PF8 share identical 64-pin TQFP pinout, timing specifications (tRC = 55 ns), and functional behavior - differing only in standby current (ISB3 = 1.0 mA vs. 0.2 mA typical) and data retention capability (LA supports 2V VCC). They are drop-in replacements except where battery backup is required.
Can both ports of IDT71342SA55PF8 perform simultaneous writes to the same memory location?
No - simultaneous writes to the same non-semaphore memory location by both ports result in undefined data. The IDT71342SA55PF8 datasheet explicitly warns against this condition. Hardware semaphores must be used to arbitrate access; concurrent writes are only safe to distinct addresses or to semaphore flags, which include built-in conflict resolution logic.
71342SA55PF8 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:
- 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)
71342SA55PF8 FAQ
1.How can I place an order for 71342SA55PF8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 71342SA55PF8 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 71342SA55PF8 reliable?
The price and inventory of 71342SA55PF8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71342SA55PF8 is usually 5 days.
3.What payment methods are accepted for 71342SA55PF8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71342SA55PF8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71342SA55PF8?
71342SA55PF8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71342SA55PF8 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 71342SA55PF8?
For technical support, including 71342SA55PF8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71342SA55PF8 requirements.
6.How does Aetrix verify that 71342SA55PF8 is sourced from the original manufacturer or authorized distributors?
All 71342SA55PF8 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 71342SA55PF8 meets industry standards.
7.What is the process for return or replacement of 71342SA55PF8?
All 71342SA55PF8 units undergo pre-shipment inspection (PSI). If there is an issue with 71342SA55PF8, 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 71342SA55PF8 part is unused and in its original packaging.
Return procedure for 71342SA55PF8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
71342SA55PF8 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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AT24C04C-SSHM-T
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24LC01BT-I/SN
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