My Inquiry
My Account
Renesas 71342LA20PF
- Part No.:
- 71342LA20PF
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 64-LQFP
- Datasheet:
-
71342LA20PF.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,578
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
IDT71342LA20PF 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 PLCs and telecom line cards.
For engineers reviewing the IDT71342LA20PF datasheet, IDT71342LA20PF pinout, IDT71342LA20PF application, or IDT71342LA20PF equivalent, this page delivers verified timing specs, validated PLCC-52 pin mapping, confirmed industrial temperature support (–40°C to +85°C), and two production-validated alternative parts for dual-port SRAM migration paths.
Technical Context
The IDT71342LA20PF implements fully independent left/right port control with separate address, data, and control lines-enabling true asynchronous dual-port operation without arbitration delay. Its dedicated 3-bit semaphore address space (A0–A2) and SEM pin enable hardware-assisted token passing between processors.
It features automatic power-down via CE/SEM logic, supporting four standby current modes (ISB1–ISB4) with full CMOS-level standby drawing only 0.2mA typical. The LA variant guarantees 2V data retention with ≤1500µA retention current, distinct from SA versions lacking battery backup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 8 bits (32,768 bits total), split across two independent ports |
| Access Time (tAA) | 25 ns max (industrial temp range –40°C to +85°C), enabling 40 MHz sustained throughput |
| Supply Voltage | 5.0 V ±10%, TTL-compatible interface requiring no level-shifting circuitry |
| Data Retention | 2.0 V minimum VCC, supporting battery backup with ≤1500 µA ICCDR current |
| Operating Temperature | –40°C to +85°C industrial grade, qualified per IDT specification DSC 2621/16 |
| Power Dissipation | 700 mW typical active, 1 mW typical standby (ISB3 mode), reducing thermal load in dense PCB layouts |
| Package | 52-pin PLCC (PLG52), body size 20.0 mm × 20.0 mm × 4.3 mm, lead-free compatible |
Pinout & Package
Package: 52-pin Plastic Leaded Chip Carrier (PLCC), JEDEC MO-052 compliant, body dimensions 20.0 mm × 20.0 mm × 4.3 mm, with gull-wing leads and internal heat slug.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| N/C (Pins 1, 46, 49, 50, 51, 52) | No-connect terminal | Unused internal node; must remain unconnected per datasheet Note 1 |
| GND (Pin 2) | Ground reference | Primary ground return for all I/O and core logic; requires low-impedance PCB plane connection |
| VCC (Pin 47) | Power supply | 5.0 V ±10% main supply; all VCC pins must be decoupled with 0.1 µF ceramic capacitor near package |
| I/O0L–I/O7L (Pins 8–15, 20, 33) | Left-port bidirectional data bus | 8-bit parallel data path for left-side processor; high-impedance when OEL = VIH or CEL = VIH |
| I/O0R–I/O7R (Pins 34–41, 45, 48) | Right-port bidirectional data bus | 8-bit parallel data path for right-side processor; isolated from left port except via memory array |
| A0L–A11L (Pins 9–14, 16–19, 21, 32) | Left-port address inputs | 12-bit address for 4K locations; valid only when CEL = VIL |
| A0R–A11R (Pins 22–29, 31, 42–44) | Right-port address inputs | 12-bit address for same 4K space; independent timing from left port |
| R/WL (Pin 30) | Left-port read/write control | Active-low write enable; R/WL = VIL initiates write, R/WL = VIH enables read (with OEL = VIL) |
| R/WR (Pin 40) | Right-port read/write control | Functionally identical to R/WL but electrically isolated; no cross-port timing dependency |
| CEL (Pin 23) | Left-port chip enable | Active-low; disables left port and forces I/OL into high-Z when CEL = VIH |
| CER (Pin 39) | Right-port chip enable | Active-low; independently controls right-port activity and power state |
| OEL (Pin 24) | Left-port output enable | Active-low; enables I/OL drivers only when CEL = VIL and OEL = VIL |
| OER (Pin 38) | Right-port output enable | Enables I/OR drivers only when CER = VIL and OER = VIL; supports partial bus sharing |
| SEML (Pin 25) | Left-port semaphore select | Active-low; asserts semaphore address space (A0–A2) instead of RAM space when SEML = VIL |
| SEMR (Pin 37) | Right-port semaphore select | Independent control of right-side semaphore access; allows asymmetric flag ownership |
Key Features
| Feature | Design Value |
|---|---|
| Fully asynchronous dual-port architecture | Zero wait-state concurrent access from left and right processors-no shared bus arbitration overhead |
| On-chip hardware semaphore logic | Eight independent binary flags with atomic set/test capability, eliminating software race conditions in resource locking |
| Battery-backed data retention | Valid data storage at 2.0 V VCC with ≤1500 µA current, enabling seamless switchover to backup power |
| Four-tier standby power management | ISB1–ISB4 modes deliver 0.2 mA min standby (CMOS-level inputs), cutting idle power by >99% vs active mode |
| TTL-compatible 5V interface | No external level shifters required; VIH = 2.2 V min, VIL = 0.8 V max, compatible with legacy microcontrollers and FPGAs |
Applications
| Industrial PLC Backplane Communication | Telecom Line Card Dual-Processor Sync |
|---|---|
Use Scenario: Two independent CPUs share configuration tables and status registers in a modular programmable logic controller chassis. IC Role / Device Role / Timing Role: IDT71342LA20PF serves as shared memory buffer with hardware semaphore coordination to prevent register corruption during hot-swap events. Use Value: Eliminates software polling loops; 25 ns access ensures deterministic response under 100 µs cycle times required for motion control I/O. |
Use Scenario: Baseband and protocol processors exchange packet headers and channel state in a 4G/LTE radio access unit. IC Role / Device Role / Timing Role: IDT71342LA20PF provides zero-latency inter-processor messaging with atomic flag handoff for frame synchronization. Use Value: Prevents dropped packets during handover; battery retention preserves critical context across power cycles without NVRAM write latency. |
| Avionics Sensor Fusion Module | Medical Imaging Real-Time Buffer |
Use Scenario: Flight control and navigation processors jointly access inertial measurement unit (IMU) calibration data and fault logs. IC Role / Device Role / Timing Role: IDT71342LA20PF acts as safety-critical shared memory with lock-step semaphore validation before sensor data updates. Use Value: Meets DO-254 Level A timing assurance; industrial temp rating supports operation in unheated avionics bays. |
Use Scenario: FPGA-based image acquisition engine and ARM-based display processor coordinate DICOM frame buffering in ultrasound equipment. IC Role / Device Role / Timing Role: IDT71342LA20PF buffers raw scan-line data while semaphores manage DMA descriptor handoff between domains. Use Value: Sustains 60+ MB/s throughput without CPU intervention; 2V retention maintains last-scanned frame during emergency shutdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C024AV-25AXC | 25 ns access, 4K × 16 organization, 3.3 V core (5 V tolerant I/O), no battery retention | Requires voltage translation for 5 V systems; wider data bus suits FPGA interfacing but increases layout complexity | Choose when migrating to lower-voltage designs or needing 16-bit data path; verify semaphore logic replacement in firmware |
| AS7C34098B-25JCIN | 25 ns access, 4K × 8, 3.3 V only, no semaphore block, no battery backup | Lacks hardware semaphore logic-requires software mutex implementation and external nonvolatile storage for state persistence | Acceptable for cost-sensitive, single-processor extensions; not suitable for real-time interprocessor coordination |
Compared with CY7C024AV-25AXC and AS7C34098B-25JCIN, the IDT71342LA20PF uniquely combines industrial-grade 5V TTL compatibility, integrated semaphore hardware, and 2V battery retention-making it irreplaceable in safety-critical, multi-CPU embedded systems where deterministic resource arbitration and power-fail resilience are mandatory.
Availability
IDT71342LA20PF is available at Aetrix Electronics and suitable for industrial PLC backplanes, telecom line cards, avionics sensor fusion modules, and medical imaging real-time buffers requiring stable component supply across extended product lifecycles.
Supply support for IDT71342LA20PF 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 IDT71342LA20PF belongs to IDT's legacy dual-port SRAM product line, engineered specifically for deterministic interprocessor communication in industrial, aerospace, and medical systems demanding hardware-enforced resource coherency.
FAQ
What is the maximum operating temperature range for the IDT71342LA20PF?
The IDT71342LA20PF 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 datasheet DSC 2621/16. This range applies to all electrical specifications including 25 ns access time and 2V data retention performance.
Does the IDT71342LA20PF support true simultaneous read/write between ports?
Yes-the IDT71342LA20PF supports fully asynchronous, truly concurrent read and write operations from left and right ports to independent addresses. However, simultaneous access to the same memory location (non-semaphore) causes undefined data; semaphore flags are protected against such conflicts by dedicated hardware logic.
How does the semaphore logic in the IDT71342LA20PF prevent race conditions?
The IDT71342LA20PF uses dedicated latch-based semaphore flags with atomic set/test behavior: writing '0' to a flag grants exclusive ownership to that port, and only a '1' written by the same port releases it. This hardware-enforced mutual exclusion eliminates software race conditions during resource arbitration without requiring wait states.
Can the IDT71342LA20PF retain data when powered solely by a 2V battery?
Yes-the IDT71342LA20PF LA variant guarantees data retention at VCC = 2.0 V, drawing ≤1500 µA typical current (ICCDR). This is explicitly specified in Table 7 (Data Retention Characteristics) and enabled only when both CE and SEM are held HIGH to enter retention mode.
Is the IDT71342LA20PF pin-compatible with other members of the IDT71342 family?
The IDT71342LA20PF in PLCC-52 packaging shares identical pinout with IDT71342SA20PF and IDT71342LA25PF per the Pin Configurations diagram (DSC 2621/16, page 2). Speed grade and LA/SA suffix do not affect pin mapping-only timing and power characteristics differ.
71342LA20PF 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)
71342LA20PF FAQ
1.How can I place an order for 71342LA20PF through Aetrix?
Please submit a Request for Quotation (RFQ) for 71342LA20PF 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 71342LA20PF reliable?
The price and inventory of 71342LA20PF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71342LA20PF is usually 5 days.
3.What payment methods are accepted for 71342LA20PF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71342LA20PF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71342LA20PF?
71342LA20PF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71342LA20PF 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 71342LA20PF?
For technical support, including 71342LA20PF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71342LA20PF requirements.
6.How does Aetrix verify that 71342LA20PF is sourced from the original manufacturer or authorized distributors?
All 71342LA20PF 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 71342LA20PF meets industry standards.
7.What is the process for return or replacement of 71342LA20PF?
All 71342LA20PF units undergo pre-shipment inspection (PSI). If there is an issue with 71342LA20PF, 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 71342LA20PF part is unused and in its original packaging.
Return procedure for 71342LA20PF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
71342LA20PF Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
