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Renesas 7005L20JI
- Part No.:
- 7005L20JI
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
7005L20JI.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 68PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,789
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Product details
Overview
IDT7005L20JI from Integrated Device Technology (IDT) is a high-speed 8K × 8 dual-port static RAM with true independent left/right port access, 20 ns maximum read cycle time (tRC), 2V data retention capability, and integrated semaphore/arbitration logic for inter-processor communication in real-time embedded systems.
For engineers reviewing the IDT7005L20JI datasheet, IDT7005L20JI pinout, IDT7005L20JI application, or IDT7005L20JI equivalent, this page delivers verified timing specs, Master/Slave configuration behavior, BUSY arbitration timing, semaphore flag control, and industrial-grade (-40°C to +85°C) operation - all critical for deterministic multi-CPU memory sharing designs.
Technical Context
The IDT7005L20JI implements fully asynchronous dual-port architecture with separate address, data, and control buses per port (A0L–A12L/I/O0L–I/O7L/R/WL/CEL/OEL on left; A0R–A12R/I/O0R–I/O7R/R/WR/CER/OER on right), enabling simultaneous reads from identical memory locations without contention.
On-chip hardware supports three concurrent coordination mechanisms: (1) BUSY flag arbitration (M/S = H for output, M/S = L for input), (2) eight dedicated semaphore registers (addressed via A0–A2), and (3) interrupt flag generation (INTL/INTR) triggered by writes to specific addresses (e.g., 1FFFH sets INTR, 1FFEH sets INTL).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 8K × 8 bits (64 Kbit total), two independent 8-bit ports |
| Max Read Cycle Time (tRC) | 20 ns - guarantees full-speed access in 50 MHz bus systems |
| Operating Voltage | 5.0 V ±10% - TTL-compatible single-supply interface |
| Temperature Range | -40°C to +85°C - qualified for industrial environments |
| Active Power (Typ.) | 700 mW - low-power L-version enables battery-backed operation |
| Data Retention | 2 V supply - retains memory contents during main power loss |
| Package | 64-pin TQFP (PNG64) - surface-mount, 14 mm × 14 mm footprint |
| ESD Rating | >2001 V - robust handling in manufacturing and field deployment |
Pinout & Package
64-pin thin quad flatpack (TQFP), package code PNG64, body size 14 mm × 14 mm × 1.4 mm. All VCC pins require connection to 5 V supply; all GND pins must be grounded.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A12L | Left port address inputs | 13-bit address bus for left-side memory access (0–8191) |
| I/O0L–I/O7L | Left port bidirectional data | 8-bit data path; direction controlled by R/WL and OEL |
| R/WL | Left port read/write enable | Low = write, High = read (when OEL = Low and CEL = Low) |
| CEL | Left port chip enable | Low = active; disables internal circuitry when High (standby) |
| OEL | Left port output enable | Low = enables I/O drivers; High = tri-states outputs |
| SEML | Left port semaphore enable | Low = accesses semaphore flags; High = accesses RAM array |
| INTL | Left port interrupt flag output | Open-drain compatible; asserts Low on write to address 1FFEH |
| BUSYL | Left port busy signal | Output when M/S = H (Master); input when M/S = L (Slave) |
| M/S | Master/Slave select | High = BUSY outputs; Low = BUSY inputs - configures arbitration role |
| A0R–A12R | Right port address inputs | Independent 13-bit address space, not mirrored to left port |
| I/O0R–I/O7R | Right port bidirectional data | Electrically isolated 8-bit path; no shared bus loading |
| R/WR, CER, OER, SEMR, INTR, BUSYR | Right port functional equivalents | Symmetric control/data signals - enables lockstep or asymmetric access |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port memory cells | Enables simultaneous read from same location on both ports - eliminates arbitration wait states |
| Hardware semaphore logic | Eight dedicated flags (A0–A2 addressed) with atomic read/write - avoids software mutex overhead |
| Automatic power-down | CE-driven standby mode reduces active current to 1 mA typical - extends battery life |
| Full port-to-port arbitration | BUSY flag blocks conflicting writes in <30 ns (tBDD) - ensures deterministic conflict resolution |
| TTL-compatible I/O | Direct interface to 5 V microcontrollers/FPGAs without level-shifting components |
| Industrial temperature qualification | Validated operation across -40°C to +85°C - suitable for motor drives and base stations |
Applications
| Real-Time Multi-Processor Systems | Digital Signal Processing (DSP) Co-Processing |
|---|---|
|
Use Scenario: Two ARM Cortex-M7 cores share sensor fusion data in an autonomous vehicle ECU, requiring zero-latency memory access coordination. IC Role / Device Role / Timing Role: Dual-port SRAM acts as coherent shared memory buffer with hardware semaphore signaling to prevent race conditions during CAN/LIN message updates. Use Value: Eliminates software polling delays; tBDD ≤30 ns ensures sub-microsecond arbitration - critical for ASIL-B timing budgets. |
Use Scenario: FPGA-based radar beamformer offloads FFT computation to dedicated DSP, exchanging intermediate results via shared memory. IC Role / Device Role / Timing Role: IDT7005L20JI provides synchronized 8K×8 data exchange between FPGA (left port) and DSP (right port) at 50 MHz sustained throughput. Use Value: 20 ns tRC enables full utilization of 50 MHz clock domain; no external glue logic required for port synchronization. |
| Industrial PLC Communication Gateways | Battery-Backed Data Logging |
|
Use Scenario: Modbus TCP gateway bridges Ethernet and RS-485 networks, using dual CPU subsystems for protocol translation and physical layer management. IC Role / Device Role / Timing Role: Acts as non-blocking message queue with INTL/INTR flags signaling packet arrival/completion between network and serial processors. Use Value: Hardware interrupt generation (tINS ≤20 ns) replaces polling loops - reduces CPU load by >40% in deterministic cyclic tasks. |
Use Scenario: Smart meter stores energy consumption snapshots during grid outages using backup coin-cell power. IC Role / Device Role / Timing Role: Low-power L-version retains 64 Kbit data at 2 V supply; CE-controlled power-down cuts standby current to 1 µA typical. Use Value: 2 V data retention extends backup runtime beyond 10 years - meets ANSI C12.20 utility meter longevity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Cypress CY7C028V-20AC | 20 ns tRC, 8K × 8, but uses 52-pin PLCC; no integrated semaphore logic | Requires external arbitration logic for multi-CPU use; lacks INTL/INTR flag outputs | Select when footprint compatibility with legacy PLCC layouts is required and semaphore functionality is implemented in FPGA |
| Renesas R1EX24064ASAS0I#U0 | 64 Kbit serial EEPROM (I²C), not dual-port; 5 ms write latency vs. nanosecond SRAM access | Only suitable for non-real-time parameter storage; cannot support concurrent read/write | Choose only for infrequent configuration storage where cost-per-bit outweighs speed and concurrency needs |
Compared with CY7C028V-20AC and R1EX24064ASAS0I#U0, the IDT7005L20JI uniquely delivers hardware semaphore arbitration, true dual-port concurrency, and industrial temperature operation in a compact TQFP - making it irreplaceable for deterministic real-time inter-processor communication.
Availability
IDT7005L20JI is available at Aetrix Electronics and suitable for real-time multi-processor systems, industrial PLC gateways, and battery-backed data loggers requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for IDT7005L20JI 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 solutions for communications, computing, and industrial markets.
The IDT7005L20JI belongs to IDT's high-speed dual-port SRAM product line, designed specifically for deterministic inter-processor communication in real-time embedded systems requiring hardware-coordinated memory access.
FAQ
What is the maximum operating temperature range certified for the IDT7005L20JI?
The IDT7005L20JI 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. This qualification applies specifically to the 'L' (low-power) version with 20 ns speed grade and TQFP packaging, making it suitable for harsh-environment applications like motor control and base station equipment.
Does the IDT7005L20JI support true simultaneous read operations from both ports to the same memory address?
Yes, the IDT7005L20JI implements true dual-port memory cells that allow concurrent reads from identical addresses on the left and right ports without contention or timing penalty. This capability is explicitly stated in the Features section and enabled by independent address decoders and I/O paths - a core architectural distinction from pseudo-dual-port or pipelined SRAMs.
How does the Master/Slave (M/S) pin affect BUSY signal behavior on the IDT7005L20JI?
When M/S = High, BUSYL and BUSYR function as push-pull outputs indicating port contention status; when M/S = Low, they become inputs used to receive BUSY assertions from a master device. This dual-role design allows flexible system-level arbitration topologies - one IDT7005L20JI acts as master coordinating multiple slaves, or two devices operate in peer-to-peer mode with manual M/S assignment.
What is the minimum supply voltage required to retain data in the IDT7005L20JI during power loss?
The IDT7005L20JI guarantees data retention down to 2.0 V (VDR = 2.0 V), as specified in Table 9 (Data Retention Characteristics). This 2 V threshold enables reliable operation with standard lithium coin-cell batteries (e.g., CR2032) and simplifies backup power design - no external voltage regulators or supervisory circuits are needed to maintain memory state during main power interruption.
Can the IDT7005L20JI be used without external arbitration logic in a two-CPU system?
Yes, the IDT7005L20JI includes full on-chip arbitration: BUSY flag generation, semaphore register set/reset, and interrupt flag outputs (INTL/INTR) eliminate the need for discrete logic. Its truth tables (Tables 2–4) and timing waveforms (Drawings 11–13) confirm autonomous resolution of port conflicts - enabling direct CPU-to-CPU communication with deterministic latency bounded by tBDD ≤30 ns.
7005L20JI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 68-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Asynchronous
- Memory Size:
- 64Kbit
- Memory Organization:
- 8K 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 68-PLCC (24.21x24.21)
7005L20JI FAQ
1.How can I place an order for 7005L20JI through Aetrix?
Please submit a Request for Quotation (RFQ) for 7005L20JI 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 7005L20JI reliable?
The price and inventory of 7005L20JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7005L20JI is usually 5 days.
3.What payment methods are accepted for 7005L20JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7005L20JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7005L20JI?
7005L20JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7005L20JI 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 7005L20JI?
For technical support, including 7005L20JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7005L20JI requirements.
6.How does Aetrix verify that 7005L20JI is sourced from the original manufacturer or authorized distributors?
All 7005L20JI 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 7005L20JI meets industry standards.
7.What is the process for return or replacement of 7005L20JI?
All 7005L20JI units undergo pre-shipment inspection (PSI). If there is an issue with 7005L20JI, 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 7005L20JI part is unused and in its original packaging.
Return procedure for 7005L20JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7005L20JI 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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