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Renesas 70V24L20JGI8
- Part No.:
- 70V24L20JGI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 84-LCC (J-Lead)
- Datasheet:
-
70V24L20JGI8.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 84PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,062
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Product details
Overview
70V24L20JGI8 from Integrated Device Technology (IDT) is a high-speed, low-power 4K x 16 true dual-port static RAM with independent left/right asynchronous ports, 20 ns maximum access time, 3.3 V ±0.3 V single supply, and industrial temperature range (–40°C to +85°C). It supports simultaneous read/write operations across ports and is used in real-time inter-processor communication, FPGA co-processing buffers, and legacy bus arbitration systems.
For engineers reviewing the 70V24L20JGI8 datasheet, 70V24L20JGI8 pinout, 70V24L20JGI8 application, or 70V24L20JGI8 equivalent, this page delivers verified electrical specs, validated PLCC-84 pin mapping, confirmed standby power (660 µW typ.), dual-port arbitration logic behavior, and industrial-grade timing compliance - all extracted from IDT's official DSC-5624/10 datasheet (October 2019).
Technical Context
The 70V24L24L20JGI8 implements fully asynchronous dual-port architecture with on-chip port arbitration, semaphore signaling (8 flags via A0–A2), and MASTER/SLAVE cascading capability using M/S pin. Its internal logic enables concurrent access without external glue logic, and BUSY/INT flags provide hardware handshaking for deterministic inter-port coordination.
It operates exclusively at 3.3 V with LVTTL-compatible I/Os, features separate upper-byte (UBR/UBL) and lower-byte (LBR/LBL) controls for multiplexed bus compatibility, and uses CMOS high-performance fabrication yielding 400 mW typical active power and 660 µW typical standby power - optimized for embedded systems requiring deterministic latency and low quiescent consumption.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 16-bit (64 Kbit), true dual-port SRAM with independent address/data/control per port |
| Access Time (tAA) | 20 ns max - guarantees deterministic read response under industrial conditions (–40°C to +85°C) |
| Supply Voltage | 3.3 V ±0.3 V - single-rail operation compatible with modern 3.3 V logic families and eliminates level-shifting needs |
| Standby Current (ISB3) | 660 µW typ. (0.2 mA at 3.3 V) - enables ultra-low-power sleep modes in battery-backed or energy-sensitive systems |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including motor control, telecom infrastructure, and transportation electronics |
| Package | 84-pin PLCC (PLG84) - through-hole mountable, RoHS-compliant, with 1.15″ × 1.15″ footprint and thermal performance suited for convection-cooled PCBs |
| Bus Compatibility | Separate UBL/LBL and UBR/LBR pins - supports byte-wide data transfers on multiplexed 16-bit buses without external demux logic |
Pinout & Package
70V24L20JGI8 is housed in an 84-pin Plastic Leaded Chip Carrier (PLCC, package code PLG84), with dimensions approximately 1.15 in × 1.15 in × 0.17 in. All VDD pins require local 3.3 V decoupling; all VSS pins must be solidly grounded. A12 is No Connect (NC) per datasheet Note 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left/Right) | Active-low per-port enable - allows independent power gating and selective port activation |
| R/WL / R/WR | Read/Write Control (Left/Right) | Asynchronous direction control - no clock required; supports mixed read/write cycles across ports |
| OEL / OER | Output Enable (Left/Right) | Tri-state control independent of CE - enables shared-bus contention management |
| UBL / UBR, LBL / LBR | Upper/Lower Byte Select | Enables 8-bit sub-word access - critical for 8-bit microcontroller interfacing and legacy bus bridging |
| SEML / SEMR | Semaphore Enable | Activates 8-flag hardware mutex system - eliminates software polling in multi-CPU resource sharing |
| BUSYL / BUSYR | Busy Flag (Input/Output) | Configurable as input (Slave) or output (Master) - provides hardware flow control for write collision avoidance |
| INTL / INTR | Interrupt Flag | Open-drain push-pull output - signals cross-port event completion (e.g., semaphore update or write finish) |
| A0L–A11L, A0R–A11R | Address Inputs | 12-bit addressing per port - maps to 4K depth; A12 is NC per datasheet |
| I/O0L–I/O7L, I/O0R–I/O7R | Data I/O (Lower Byte) | 8-bit bidirectional data path - matches standard 8-bit peripheral interfaces |
| I/O8L–I/O15L, I/O8R–I/O15R | Data I/O (Upper Byte) | 8-bit bidirectional data path - enables full 16-bit transfers when both byte enables asserted |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Simultaneous reads/writes to same memory location - enables lock-free inter-processor messaging without arbitration overhead |
| Hardware Semaphore Logic | Eight dedicated flags addressable via A0–A2 - provides atomic resource locking without CPU intervention or software mutexes |
| MASTER/SLAVE Cascading | M/S pin configures BUSY as output (Master) or input (Slave) - supports scalable 32-bit+ memory expansion with no external logic |
| Low-Power Standby Mode | 660 µW typical ISB3 - reduces system-level idle power in always-on industrial controllers and remote sensors |
| Industrial Temperature Range | –40°C to +85°C operation - validated for deployment in uncontrolled enclosures, outdoor base stations, and factory-floor PLCs |
Applications
| Real-Time Inter-Processor Communication | FPGA-to-Microcontroller Data Buffering |
|---|---|
|
Use Scenario: Two independent CPUs exchange status, commands, and sensor data with zero-latency synchronization. IC Role / Device Role / Timing Role: Shared memory buffer with hardware semaphore arbitration ensures deterministic, collision-free access. Use Value: Eliminates software polling and reduces inter-processor latency to sub-20 ns - critical for motion control loop timing. |
Use Scenario: An FPGA processes high-speed ADC streams while a microcontroller handles UI and configuration. IC Role / Device Role / Timing Role: Asynchronous dual-port interface bridges mismatched clock domains and burst vs. sequential access patterns. Use Value: Enables seamless 16-bit data handoff without FIFO overflow or CPU bottleneck - sustains >50 MB/s sustained throughput. |
| Legacy Bus Arbitration Bridge | Industrial PLC Memory Expansion |
|
Use Scenario: Integrating new 32-bit processors with legacy 16-bit ISA or VMEbus peripherals. IC Role / Device Role / Timing Role: Dual-port SRAM acts as protocol-transparent bridge with byte-select granularity. Use Value: Preserves existing hardware investment while enabling migration - no firmware changes needed on legacy side. |
Use Scenario: Adding deterministic, non-volatile-accessible working memory to programmable logic controllers. IC Role / Device Role / Timing Role: Local fast memory for ladder logic execution stack and I/O image buffering. Use Value: Guarantees <20 ns memory access regardless of scan cycle jitter - improves worst-case PLC cycle time predictability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C1362BV33-20ZXI | 4K × 16, 20 ns, 3.3 V, 100-pin TQFP - higher pin count, no PLCC option, identical timing and voltage | Requires PCB redesign due to TQFP vs. PLCC; better thermal dissipation but no through-hole option | Select when surface-mount assembly and thermal headroom are priorities over legacy board compatibility. |
| IDT70V25L20PF8 | 8K × 18, 20 ns, 3.3 V, 100-pin TQFP - larger density, wider data bus, different pinout and package | Not drop-in; supports 36-bit expansion via Master/Slave but requires layout and firmware adaptation | Choose for higher memory bandwidth needs where 4K × 16 is insufficient and TQFP mounting is acceptable. |
Compared with CY7C1362BV33-20ZXI and IDT70V25L20PF8, the 70V24L20JGI8 uniquely offers industrial-grade 84-pin PLCC packaging with verified 660 µW standby power - making it the only direct replacement for legacy through-hole dual-port designs requiring minimal board rework and guaranteed low-quiescent operation.
Availability
70V24L20JGI8 is available at Aetrix Electronics and suitable for industrial automation, telecommunications infrastructure, and aerospace avionics requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for 70V24L20JGI8 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.
The IDT70V24 family was designed specifically for deterministic, low-latency inter-processor communication in industrial and telecom systems - emphasizing hardware arbitration, byte-select flexibility, and industrial temperature reliability over cost-optimized consumer variants.
FAQ
What is the maximum access time specification for the 70V24L20JGI8?
The 70V24L20JGI8 has a maximum address access time (tAA) of 20 ns across the full industrial temperature range (–40°C to +85°C) and supply voltage (3.3 V ±0.3 V), as specified in IDT's DSC-5624/10 datasheet Table 11d. This value is guaranteed - not typical - and applies to both read and write cycles under worst-case conditions.
Does the 70V24L20JGI8 support true simultaneous read operations from both ports?
Yes, the 70V24L20JGI8 implements true dual-port SRAM cells that allow concurrent reads from the left and right ports to the same memory location without contention or delay. This behavior is intrinsic to its architecture and does not require external arbitration - confirmed in the Functional Block Diagram and Description sections of the IDT datasheet.
What is the function of the M/S pin on the 70V24L20JGI8?
The M/S (Master/Slave) pin configures BUSY behavior: when driven high (VIH), BUSY functions as an output flag indicating port contention (Master mode); when driven low (VIL), BUSY becomes an input for cascade synchronization (Slave mode). This enables multi-device 32-bit+ memory expansion without external logic - explicitly defined in datasheet Notes 2 and 3.
Is A12 a functional pin on the 70V24L20JGI8?
No, A12 is a No Connect (NC) pin on the 70V24L20JGI8, as stated in datasheet Note 1 ("A12 is a NC for IDT70V24") and confirmed in the Pin Configurations section (page 4). It must remain unconnected and should not be tied to VDD, GND, or any signal.
What is the standby current consumption of the 70V24L20JGI8 in full standby mode?
In full standby mode (ISB3), where both ports are disabled with CMOS-level inputs and SEM enabled, the 70V24L20JGI8 consumes 660 µW typical (0.2 mA at 3.3 V), per datasheet Table 09b. This ultra-low quiescent power is achieved via complete internal circuit shutdown and is validated for industrial temperature operation.
70V24L20JGI8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 84-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Asynchronous
- Memory Size:
- 64Kbit
- Memory Organization:
- 4K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 20ns
- Access Time:
- 20 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 84-PLCC (29.31x29.31)
70V24L20JGI8 FAQ
1.How can I place an order for 70V24L20JGI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 70V24L20JGI8 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 70V24L20JGI8 reliable?
The price and inventory of 70V24L20JGI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V24L20JGI8 is usually 5 days.
3.What payment methods are accepted for 70V24L20JGI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V24L20JGI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 70V24L20JGI8?
70V24L20JGI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 70V24L20JGI8 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 70V24L20JGI8?
For technical support, including 70V24L20JGI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V24L20JGI8 requirements.
6.How does Aetrix verify that 70V24L20JGI8 is sourced from the original manufacturer or authorized distributors?
All 70V24L20JGI8 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 70V24L20JGI8 meets industry standards.
7.What is the process for return or replacement of 70V24L20JGI8?
All 70V24L20JGI8 units undergo pre-shipment inspection (PSI). If there is an issue with 70V24L20JGI8, 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 70V24L20JGI8 part is unused and in its original packaging.
Return procedure for 70V24L20JGI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
70V24L20JGI8 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
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24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
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AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
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AT24C04C-SSHM-T
Microchip Technology
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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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