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Renesas 71342SA20PF
- Part No.:
- 71342SA20PF
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 64-LQFP
- Datasheet:
-
71342SA20PF.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,538
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Product details
Overview
IDT71342SA20PF from Integrated Device Technology is a high-speed 4K × 8 dual-port static RAM with on-chip semaphore logic, TTL-compatible 5V operation, 20ns max read cycle time (commercial grade), and full asynchronous port independence. It enables concurrent left/right port access in real-time interprocessor communication systems such as industrial motion controllers and telecom line cards.
For engineers reviewing the IDT71342SA20PF datasheet, IDT71342SA20PF pinout, IDT71342SA20PF application, or IDT71342SA20PF equivalent, key selection considerations include its 20ns access timing, dual-port arbitration via hardware semaphore flags, 52-pin PLCC package compatibility, and support for battery-backed data retention in LA variants (not applicable to SA).
Technical Context
The IDT71342SA20PF implements two fully independent CMOS SRAM ports-left (L) and right (R)-each with dedicated address (A0–A11), data (I/O0–I/O7), and control lines (CE, OE, R/W). Semaphore logic resides in a separate 8-location address space (A0–A2 only), accessed via SEM pin assertion and active-low flag semantics.
It uses TTL-level signaling with single 5V ±10% supply, supports automatic power-down when CE and SEM are high, and delivers 170mA typical dynamic current (both ports active) at 20ns speed grade. The SA suffix denotes commercial-temperature (0°C to +70°C) and standard-power operation-distinct from LA's 2V data retention capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 8 bits (4096 words × 8-bit wide), dual-port architecture with physically separate I/O and control paths per port |
| Access Time (tAA) | 20 ns max - determines minimum clock-to-data valid delay in synchronous bus interfaces |
| Read Cycle Time (tRC) | 20 ns max - sets maximum sustained read throughput of 50 MHz per port |
| Supply Voltage | 4.5 V to 5.5 V - compatible with legacy 5V TTL logic families without level translation |
| Operating Temperature | 0°C to +70°C - commercial-grade qualification suitable for office/industrial indoor environments |
| Dynamic Current (ICC) | 170 mA typ. (both ports active) - informs thermal design and power rail sizing for multi-port memory subsystems |
| Standby Current (ISB3) | 1.0 mA typ. (full CMOS standby) - enables low-power sleep modes during processor idle periods |
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 |
|---|---|---|
| A0L–A11L | Left port address inputs | 12-bit address bus for left-side memory access; no effect on semaphore operations |
| A0R–A11R | Right port address inputs | 12-bit address bus for right-side memory access; fully asynchronous with left port |
| I/O0L–I/O7L | Left port bidirectional data | 8-bit parallel data path; high-impedance when OE = VIH or CE = VIH |
| I/O0R–I/O7R | Right port bidirectional data | 8-bit parallel data path; electrically isolated from left port I/O lines |
| CEL / CER | Chip enable (left/right) | Active-low enables respective port; deassertion places port in low-power standby |
| OEL / OER | Output enable (left/right) | Active-low controls output drivers; allows read-only access without disabling port |
| R/WL / R/WR | Read/write control (left/right) | Active-low initiates write; high enables read; must be stable during address setup |
| SEML / SEMR | Semaphore flag control (left/right) | Active-low selects semaphore address space (A0–A2 only); enables token-passing arbitration |
| VCC | Power supply | +5V ±10% main supply; all VCC pins must be connected and decoupled locally |
| GND | Ground reference | Common return path; all GND pins must be connected to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Fully asynchronous dual-port operation | Enables simultaneous, independent read/write access from left and right buses without arbitration delay or wait states |
| On-chip hardware semaphore logic | Eight dedicated binary flags (A0–A2 addressable) provide lock-free interprocessor synchronization without software polling overhead |
| TTL-compatible 5V interface | Direct connection to legacy microcontrollers, FPGAs, and ASICs without level-shifting circuitry |
| Automatic power-down mode | Reduces standby current to 1.0 mA typ. when both CE and SEM are high-critical for energy-constrained embedded systems |
| Commercial-speed 20ns timing | Supports 50 MHz burst reads in high-throughput applications like packet buffering and real-time DSP co-processing |
Applications
| Industrial Motion Controller | Telecom Line Card Buffer |
|---|---|
Use Scenario: Dual-CPU architecture where one processor handles trajectory planning and the other manages servo loop execution. IC Role / Device Role / Timing Role: Shared memory buffer with hardware semaphore coordination ensures deterministic handoff of motion profiles without CPU intervention. Use Value: Eliminates software mutex latency; guarantees sub-20ns memory access consistency between real-time tasks. |
Use Scenario: High-speed TDM frame assembly/disassembly across multiple DSPs on a carrier-grade line card. IC Role / Device Role / Timing Role: Dual-port SRAM acts as ping-pong buffer between ingress and egress processing engines, synchronized via semaphore flags. Use Value: Enables zero-wait-state data transfer at OC-48 line rates; avoids FIFO overflow under bursty traffic conditions. |
| Medical Imaging Subsystem | Avionics Display Processor |
Use Scenario: CT scanner image reconstruction pipeline with FPGA-accelerated filtering and ARM-based UI rendering. IC Role / Device Role / Timing Role: Frame buffer memory shared between FPGA (write) and ARM (read), arbitrated by hardware semaphores. Use Value: Prevents pixel corruption during concurrent write/read; sustains 20ns access for real-time display updates at 60 Hz. |
Use Scenario: Multi-core flight management computer sharing navigation database updates between safety-critical and non-critical partitions. IC Role / Device Role / Timing Role: Secure shared memory region with semaphore-enforced access control between partitioned processors. Use Value: Meets DO-254/DO-178C requirements for deterministic inter-partition communication without kernel involvement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C1352BV25AC | 25ns access, 64-pin TQFP, supports -40°C to +85°C industrial temp; no integrated semaphore logic | Requires external arbitration logic or software semaphores; higher PCB footprint | Choose when extended temperature range is required and external semaphore implementation is acceptable |
| IDT71344SA20PF | Same 20ns speed and PLCC-52 package; 8K × 8 organization (double capacity); identical semaphore architecture | Provides larger shared memory space for complex multi-threaded firmware; pin-compatible upgrade path | Choose when application requires >4KB shared buffer while retaining same timing and footprint |
Compared with CY7C1352BV25AC and IDT71344SA20PF, the IDT71342SA20PF offers unique on-die semaphore logic in a compact 52-pin PLCC at 20ns speed-enabling lower-system-latency interprocessor coordination without layout changes or external components.
Availability
IDT71342SA20PF is available at Aetrix Electronics and suitable for industrial motion controllers, telecom line cards, medical imaging subsystems, and avionics display processors requiring stable component supply across multi-year production cycles.
Supply support for IDT71342SA20PF 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.
IDT71342SA20PF 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-induced latency.
FAQ
What is the operating temperature range of the IDT71342SA20PF?
The IDT71342SA20PF is rated for commercial temperature operation from 0°C to +70°C. This distinguishes it from the LA variant (e.g., IDT71342LA25PF), which supports industrial range (–40°C to +85°C) and 2V data retention. The 'SA' suffix explicitly denotes commercial-grade thermal specification.
Does the IDT71342SA20PF support battery backup for data retention?
No, the IDT71342SA20PF does not support battery backup or low-voltage data retention. That capability is exclusive to the LA variant (e.g., IDT71342LA), which specifies 2.0V minimum VCC for data retention and 100 µA typical retention current. The SA version operates only within the standard 4.5V–5.5V supply range.
How many semaphore flags does the IDT71342SA20PF provide, and how are they addressed?
The IDT71342SA20PF provides eight hardware semaphore flags, accessed exclusively through address lines A0–A2 while SEM is asserted low. All other address bits (A3–A11) are ignored during semaphore operations. Each flag is a binary latch with active-low semantics: writing '0' requests the token, writing '1' releases it.
Is the IDT71342SA20PF pin-compatible with other members of the IDT7134x family?
Yes, the IDT71342SA20PF in 52-pin PLCC shares identical pinout with IDT71342LA20PF and IDT71342SA25PF. However, it is not pin-compatible with the 64-pin TQFP variants (e.g., IDT71342SA20PG), which have different pin assignments, additional N/C pins, and distinct power/ground distribution.
What is the significance of the '20' in IDT71342SA20PF?
The '20' in IDT71342SA20PF specifies a maximum read cycle time (tRC) and address access time (tAA) of 20 ns for commercial-grade operation. This speed grade defines the device's timing performance envelope-critical for synchronizing with 50 MHz bus clocks-and is validated under VCC = 5.0 V ±10% and TA = +25°C conditions.
71342SA20PF 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:
- 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)
71342SA20PF FAQ
1.How can I place an order for 71342SA20PF through Aetrix?
Please submit a Request for Quotation (RFQ) for 71342SA20PF 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 71342SA20PF reliable?
The price and inventory of 71342SA20PF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71342SA20PF is usually 5 days.
3.What payment methods are accepted for 71342SA20PF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71342SA20PF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71342SA20PF?
71342SA20PF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71342SA20PF 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 71342SA20PF?
For technical support, including 71342SA20PF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71342SA20PF requirements.
6.How does Aetrix verify that 71342SA20PF is sourced from the original manufacturer or authorized distributors?
All 71342SA20PF 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 71342SA20PF meets industry standards.
7.What is the process for return or replacement of 71342SA20PF?
All 71342SA20PF units undergo pre-shipment inspection (PSI). If there is an issue with 71342SA20PF, 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 71342SA20PF part is unused and in its original packaging.
Return procedure for 71342SA20PF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
71342SA20PF Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
Microchip Technology
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24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
STMicroelectronics
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AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
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24LC01BT-I/SN
Microchip Technology
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24AA02UIDT-I/OT
Microchip Technology
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AT24C08C-STUM-T
Microchip Technology
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