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Renesas 71342LA20PFG
- Part No.:
- 71342LA20PFG
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 64-LQFP
- Datasheet:
-
71342LA20PFG.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:263
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Product details
Overview
IDT71342LA20PFG from Integrated Device Technology is a high-speed 4K × 8 dual-port static RAM with on-chip semaphore logic, TTL-compatible 5V operation, 25ns max access time (industrial grade), and battery-backed data retention down to 2V. It enables concurrent asynchronous read/write access from left and right ports in real-time interprocessor communication systems such as industrial motion controllers and avionics data concentrators.
For engineers reviewing the IDT71342LA20PFG datasheet, IDT71342LA20PFG pinout, IDT71342LA20PFG application, or IDT71342LA20PFG equivalent, this device delivers deterministic port-to-port arbitration via hardware semaphores, supports full standby current as low as 0.2mA, and operates across –40°C to +85°C with verified 52-pin PLCC packaging and validated I/O pin isolation between ports.
Technical Context
The IDT71342LA20PFG implements fully independent left/right address, control, and data buses with separate CE, OE, R/W, and SEM enables-enabling true asynchronous dual-port operation without bus contention. Its semaphore block consists of eight dedicated latches accessible only via A0–A2 when SEM = VIL, with active-low token semantics and automatic contention resolution.
Each port features CMOS-level power-down control: ISB3 full-standby current is 0.2mA (typ.) at VCC = 5V, and data retention mode activates at VCC ≥ 2.0V with ICCDR ≤ 1500µA. The device uses standard TTL input thresholds (VIH = 2.2V, VIL = 0.8V) and drives 6mA loads with VOL ≤ 0.4V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 8 bits (4096 words × 8-bit data bus per port) |
| Access Time (tAA) | 25ns max - guarantees sub-40MHz sustained dual-port throughput |
| Supply Voltage | 4.5V to 5.5V - compatible with standard 5V TTL logic rails |
| Data Retention Voltage | 2.0V min - enables battery backup during main power loss |
| Operating Temperature | –40°C to +85°C - qualified for industrial embedded environments |
| Standby Current (ISB3) | 0.2mA typ. - enables ultra-low-power sleep states in portable systems |
| Output Drive Strength | 6mA sink / 4mA source - directly interfaces with 74LS/74HC logic families |
Pinout & Package
Package: 52-pin Plastic Leaded Chip Carrier (PLCC), body size 20.0mm × 20.0mm × 4.3mm, lead pitch 0.635mm, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A11L | Left port address inputs | 12-bit address bus for left-side memory access (4K space) |
| A0R–A11R | Right port address inputs | 12-bit address bus for right-side memory access (independent decoding) |
| I/O0L–I/O7L | Left port bidirectional data | 8-bit data path isolated from right port; high-impedance when OE or CE inactive |
| I/O0R–I/O7R | Right port bidirectional data | 8-bit data path electrically and timing-isolated from left port |
| CEL, CER | Chip enable (left/right) | Active-low enables; deassertion places respective port in standby (ISB1–ISB4) |
| OEL, OER | Output enable (left/right) | Active-low controls output drivers; allows read-only access without disabling chip |
| R/WL, R/WR | Read/write control (left/right) | Active-low write strobe; high = read, low = write; no bus turnaround delay |
| SEML, SEMR | Semaphore enable (left/right) | Active-low selects semaphore register space (A0–A2 only); disables RAM access |
| VCC, GND | Power supply | All VCC pins must be decoupled locally; all GND pins tied to common ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Hardware semaphore arbitration | Eight dedicated binary flags with atomic set/test semantics prevent software race conditions in multi-CPU systems |
| Asynchronous dual-port operation | No shared clocks or synchronization required-ports operate independently at full speed |
| Battery-backed data retention | Maintains stored data at 2V supply, enabling seamless switchover to backup power in critical systems |
| Ultra-low standby power | 0.2mA typical full-standby current (ISB3) reduces system-level power budget in always-on applications |
| TTL-compatible interface | Direct connection to legacy 5V microcontrollers and FPGAs without level-shifting circuitry |
Applications
| Industrial Motion Controller | Avionics Data Concentrator |
|---|---|
Use Scenario: Two DSPs coordinate motor trajectory generation and real-time feedback sampling in CNC systems. IC Role / Device Role / Timing Role: Dual-port RAM serves as shared buffer for position commands and encoder data; semaphores arbitrate write access to command queue. Use Value: Eliminates software polling delays-token-passing semaphore ensures deterministic <100ns flag acquisition, enabling 20kHz servo loop updates. |
Use Scenario: Flight management unit and display processor share sensor fusion results in real-time cockpit displays. IC Role / Device Role / Timing Role: IDT71342LA20PFG acts as synchronized data exchange hub; left port receives ARINC-429 decoded values, right port supplies rendered graphics metadata. Use Value: Hardware semaphore prevents frame corruption during simultaneous read/write-guarantees zero-frame-drop video overlay in safety-critical HUDs. |
| Medical Imaging Subsystem | Telecom Baseband Processor |
Use Scenario: FPGA-accelerated image reconstruction engine and ARM-based UI controller access DICOM pixel buffers. IC Role / Device Role / Timing Role: Dual-port SRAM stores 16-bit raw CT scan lines; semaphores lock region-specific buffers during histogram equalization passes. Use Value: 25ns access time sustains >1.2Gbps aggregate bandwidth across both ports-meets PACS DICOM transfer latency requirements. |
Use Scenario: Dual-core baseband processor handles LTE uplink/downlink scheduling with shared channel estimation tables. IC Role / Device Role / Timing Role: IDT71342LA20PFG provides coherently accessed LUT storage; semaphores serialize writes to MIMO precoding coefficients. Use Value: Battery-retention capability preserves calibration data during hot-swap power transitions-ensures RF alignment continuity in macrocell radios. |
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 |
|---|---|---|---|
| CY7C1354V25 | 3.3V core, 25ns access, 64-pin TQFP only; no battery retention | Requires level-shifting in 5V systems; unsuitable for battery-backup designs | Select when migrating to 3.3V infrastructure and external retention is acceptable |
| IDT71322LA25PFI | 2K × 16 organization, same 5V/25ns/–40°C to +85°C spec, 52-pin PLCC | Half memory depth but double data width; better for 16-bit bus architectures | Choose when system bus is 16-bit and 2K-word depth suffices for buffer allocation |
Compared with CY7C1354V25 and IDT71322LA25PFI, the IDT71342LA20PFG uniquely combines 5V TTL compatibility, 2V data retention, and 4K × 8 density in a 52-pin PLCC-making it irreplaceable in legacy industrial controllers requiring drop-in 5V upgrade paths with battery hold-up.
Availability
IDT71342LA20PFG is available at Aetrix Electronics and suitable for industrial motion controllers, avionics data concentrators, medical imaging subsystems, and telecom baseband processors requiring stable component supply across extended product lifecycles.
Supply support for IDT71342LA20PFG 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 IDT71342LA20PFG belongs to IDT's legacy dual-port SRAM product line, engineered specifically for deterministic interprocessor communication in real-time embedded systems where hardware arbitration eliminates software overhead and timing uncertainty.
FAQ
What is the maximum operating temperature range for the IDT71342LA20PFG?
The IDT71342LA20PFG is rated for industrial temperature operation from –40°C to +85°C. This specification is confirmed in the Absolute Maximum Ratings table and DC Electrical Characteristics section of the official datasheet, with all timing parameters (including 25ns access time) guaranteed across this full range.
Does the IDT71342LA20PFG support true simultaneous read/write between ports?
Yes-the IDT71342LA20PFG supports fully asynchronous, simultaneous read/write operations on left and right ports. However, writing to the same non-semaphore memory location from both ports concurrently is undefined; the semaphore logic prevents such conflicts by design, ensuring safe resource sharing without wait states.
How does the semaphore logic in the IDT71342LA20PFG resolve simultaneous token requests?
When both ports attempt to write '0' to the same semaphore flag simultaneously, the IDT71342LA20PFG's on-chip logic guarantees that exactly one port receives the token. If timing skew exists, the earlier request wins; if perfectly aligned, assignment is deterministic but arbitrary-never resulting in deadlock or indeterminate state.
Can the IDT71342LA20PFG retain data during main power loss?
Yes-the IDT71342LA20PFG (LA variant) supports battery-backed data retention at VCC ≥ 2.0V, with typical retention current of 100µA and maximum of 1500µA. This is explicitly documented in the Data Retention Characteristics table and applies only to the LA version, not SA variants.
What package type is used for the IDT71342LA20PFG?
The IDT71342LA20PFG uses a 52-pin Plastic Leaded Chip Carrier (PLCC) package, as confirmed by the Pin Configurations diagram and package code "PFG" in the part number. The PLCC footprint measures 20.0mm × 20.0mm × 4.3mm with 0.635mm lead pitch and is RoHS-compliant.
71342LA20PFG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 64-LQFP
- Packaging:
- Tray
- Product Status:
- Active
- 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:
- 20ns
- Access Time:
- 20 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)
71342LA20PFG FAQ
1.How can I place an order for 71342LA20PFG through Aetrix?
Please submit a Request for Quotation (RFQ) for 71342LA20PFG 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 71342LA20PFG reliable?
The price and inventory of 71342LA20PFG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71342LA20PFG is usually 5 days.
3.What payment methods are accepted for 71342LA20PFG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71342LA20PFG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71342LA20PFG?
71342LA20PFG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71342LA20PFG 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 71342LA20PFG?
For technical support, including 71342LA20PFG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71342LA20PFG requirements.
6.How does Aetrix verify that 71342LA20PFG is sourced from the original manufacturer or authorized distributors?
All 71342LA20PFG 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 71342LA20PFG meets industry standards.
7.What is the process for return or replacement of 71342LA20PFG?
All 71342LA20PFG units undergo pre-shipment inspection (PSI). If there is an issue with 71342LA20PFG, 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 71342LA20PFG part is unused and in its original packaging.
Return procedure for 71342LA20PFG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
71342LA20PFG 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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24LC01BT-I/SN
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24AA02UIDT-I/OT
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AT24C08C-STUM-T
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