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Renesas 7024L55PFI
- Part No.:
- 7024L55PFI
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
7024L55PFI.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,766
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Product details
Overview
7024L55PFI from IDT is a high-speed 4K × 16 true dual-port static RAM with independent left/right ports, 55 ns max read cycle time, TTL-compatible 5V ±10% supply, and industrial temperature range (–40°C to +85°C). It supports simultaneous asynchronous access, on-chip semaphore signaling, and battery backup data retention down to 2V - enabling use in real-time interprocessor communication systems requiring deterministic arbitration.
For engineers reviewing the 7024L55PFI datasheet, 7024L55PFI pinout, 7024L55PFI application, or 7024L55PFI equivalent, key selection considerations include BUSY flag arbitration timing (tBDD ≤ 30 ns), dual-port write contention resolution via M/S select, full standby current of 0.2 mA (typ.), and compatibility with 84-pin PLCC packaging for legacy board designs.
Technical Context
The 7024L55PFI implements fully asynchronous dual-port operation with separate address, control, and I/O buses per port. Its on-chip arbitration logic resolves port conflicts using BUSY flag assertion (M/S = H) or input (M/S = L), and supports eight hardware semaphores addressed by A0–A2 for inter-processor synchronization.
It features separate upper-byte (UB/UBR) and lower-byte (LB/LBR) enables for multiplexed bus compatibility, and operates in three power states: active (750 mW typ.), standby (1 mW typ. for L version), and full standby (0.2 mA typ. at CMOS-level inputs). Data retention is guaranteed at VCC = 2V across –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 16 (64 Kbit), true dual-port SRAM with independent left/right address/data/control paths |
| Max Read Cycle Time | 55 ns - defines minimum time between consecutive reads on same port; critical for real-time system throughput |
| Supply Voltage | 5.0 V ±10% - TTL-compatible single supply; no auxiliary voltage rails required |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments without derating |
| Full Standby Current | 0.2 mA (typ.) - enables ultra-low-power hold mode during processor sleep or idle states |
| Data Retention Voltage | 2.0 V minimum - supports battery backup operation with standard 3V coin cell stepped down to 2V |
| Package | 84-pin PLCC - surface-mount compatible with proven thermal and mechanical reliability in embedded systems |
Pinout & Package
7024L55PFI is housed in an 84-pin Plastic Leaded Chip Carrier (PLCC) package with 0.050" lead pitch and JEDEC MO-047A outline. The body size is approximately 1.15 in × 1.15 in × 0.17 in.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Active-low enables memory array access on respective port; deassertion places port in low-power standby |
| R/WL / R/WR | Read/Write Control (Left / Right) | Active-low selects write mode; high enables read output drivers - determines data direction per port |
| OEL / OER | Output Enable (Left / Right) | Active-low enables I/O drivers; allows tri-state control independent of CE/R/W for bus sharing |
| UBL / UBR, LBL / LBR | Upper/Lower Byte Select | Enable byte-level writes to I/O8–I/O15 (upper) or I/O0–I/O7 (lower); essential for 8-bit bus interfacing |
| SEML / SEMR | Semaphore Enable | Active-low enables access to 8-bit semaphore register (addressed by A0–A2); used for inter-processor locking |
| BUSYL / BUSYR | Busy Flag (Master Output / Slave Input) | When M/S = H, BUSY is output indicating port contention; when M/S = L, BUSY is input for slave arbitration |
| INTL / INTR | Interrupt Flag | Open-drain push-pull output signals semaphore or arbitration event; requires external pull-up |
| M/S | Master/Slave Select | Configures device role in cascaded systems: H = master (BUSY output), L = slave (BUSY input) |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Enables simultaneous read/write to same memory location - eliminates software polling and guarantees deterministic latency |
| Hardware Semaphore Logic | Eight dedicated flags accessible via A0–A2 and SEM enable - provides atomic lock/unlock without external logic or CPU intervention |
| Automatic Power-Down | Chip enable (CE) control reduces active current to 1 mW (typ.) - extends battery life in backup mode without firmware overhead |
| On-Chip Arbitration | Dedicated logic resolves port contention via BUSY flag with tAPS = 5 ns setup - ensures priority resolution within one clock cycle |
| 2V Data Retention | Maintains stored data at VCC ≥ 2.0 V across full industrial temperature range - enables seamless switchover to backup power |
Applications
| Industrial PLC Backplane Memory | Avionics Cross-Channel Data Exchange |
|---|---|
Use Scenario: Two independent CPUs exchange status, sensor data, and control commands across a shared memory buffer in a safety-critical programmable logic controller. IC Role / Device Role / Timing Role: Acts as deterministic interprocessor communication buffer with hardware-enforced mutual exclusion via semaphores and BUSY arbitration. Use Value: Eliminates race conditions and software locks; 55 ns access time ensures sub-100 ns round-trip data transfer between channels. |
Use Scenario: Redundant flight control computers share telemetry and actuator commands via dual-port RAM in DO-254-compliant avionics modules. IC Role / Device Role / Timing Role: Provides fault-isolated, low-latency memory coupling with M/S configuration enabling master-slave failover coordination. Use Value: tBDD ≤ 30 ns guarantees valid read data within 30 ns after BUSY deassertion - meeting ARINC-653 partition timing budgets. |
| Medical Imaging Frame Buffer | Test Equipment Pattern Generator |
Use Scenario: Real-time ultrasound image acquisition engine writes raw pixel data while display subsystem reads completed frames - both operating concurrently. IC Role / Device Role / Timing Role: Serves as zero-wait-state frame buffer with independent left/right I/O banks supporting simultaneous capture and render pipelines. Use Value: Separate UBL/LBR enables byte-granular writes during acquisition and full-word reads during display refresh - maximizing bandwidth utilization. |
Use Scenario: Automated test equipment uses two synchronized pattern generators to drive DUT inputs while capturing response data - requiring tightly coupled memory access. IC Role / Device Role / Timing Role: Functions as synchronized stimulus/response memory with semaphore-controlled handshaking between generator and capture engines. Use Value: Hardware semaphore update pulse (tSOP = 15 ns) ensures sub-20 ns lock acquisition - enabling nanosecond-precision test vector sequencing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C136-55JC | 55 ns access, 4K × 16, 5V, 84-pin PLCC - identical speed and package but Cypress implementation lacks integrated M/S cascade logic | Requires external glue logic for master/slave chaining; no native BUSY arbitration signal | Choose when existing design uses Cypress toolchain or requires pin-for-pin replacement without modifying arbitration firmware |
| IS61LV25616AL-10TL | 10 ns access, 16K × 16, 3.3V supply, 100-pin TQFP - faster and higher density but incompatible voltage and package | Not suitable for 5V industrial backplanes; requires level-shifting and PCB redesign | Consider only for new 3.3V designs needing higher bandwidth and capacity - not a drop-in replacement |
Compared with CY7C136-55JC and IS61LV25616AL-10TL, the 7024L55PFI uniquely integrates M/S-selectable BUSY arbitration and 2V data retention in a legacy 84-pin PLCC footprint - making it irreplaceable for maintaining industrial control system longevity without hardware revision.
Availability
7024L55PFI is available at Aetrix Electronics and suitable for industrial automation, avionics subsystems, and medical imaging equipment requiring stable component supply across extended product lifecycles.
Supply support for 7024L55PFI 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
IDT (Integrated Device Technology) is a fabless semiconductor company specializing in timing, memory interface, and RF solutions, now part of Renesas Electronics since 2019.
The 7024L55PFI belongs to IDT's legacy high-speed dual-port SRAM family, designed specifically for deterministic interprocessor communication in real-time embedded systems where arbitration latency and data integrity are mission-critical.
FAQ
What does the 'L' in 7024L55PFI signify?
The 'L' denotes the low-power variant of the IDT7024 family. For the 7024L55PFI, this means typical standby current is reduced to 1 mW (vs. 5 mW for the 'S' version), and full standby current drops to 0.2 mA - enabling extended battery-backed data retention in industrial systems where power budget is constrained.
How does the M/S pin affect BUSY signal behavior on the 7024L55PFI?
When M/S = H (high), the 7024L55PFI operates as a master: BUSYL and BUSYR become output signals that assert when port contention occurs. When M/S = L (low), it acts as a slave: BUSYL and BUSYR become inputs, allowing external master devices to control arbitration - enabling flexible cascading in multi-device memory systems.
Can the 7024L55PFI retain data at 2V across its full industrial temperature range?
Yes. The 7024L55PFI guarantees data retention at VCC ≥ 2.0 V over –40°C to +85°C, as confirmed in Table 10 of the datasheet. This is a defining feature of the 'L' variant and enables reliable operation during brownout conditions or when powered from a backup lithium battery without regulation.
What is the purpose of the semaphore function in the 7024L55PFI?
The semaphore function in the 7024L55PFI provides eight hardware-managed flags accessed via A0–A2 and SEM enable. These flags support atomic lock/unlock operations between processors - eliminating race conditions in shared-memory systems without requiring software-based spinlocks or external arbitration logic.
Which package type is used by the 7024L55PFI?
The 7024L55PFI uses an 84-pin Plastic Leaded Chip Carrier (PLCC) package, as indicated by the 'P' in the suffix. This is a surface-mount, thermally robust package with J-leads, widely adopted in industrial and aerospace applications for its reliability and repairability.
7024L55PFI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 100-LQFP
- Packaging:
- Tray
- 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:
- 55ns
- Access Time:
- 55 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-TQFP (14x14)
7024L55PFI FAQ
1.How can I place an order for 7024L55PFI through Aetrix?
Please submit a Request for Quotation (RFQ) for 7024L55PFI 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 7024L55PFI reliable?
The price and inventory of 7024L55PFI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7024L55PFI is usually 5 days.
3.What payment methods are accepted for 7024L55PFI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7024L55PFI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7024L55PFI?
7024L55PFI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7024L55PFI 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 7024L55PFI?
For technical support, including 7024L55PFI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7024L55PFI requirements.
6.How does Aetrix verify that 7024L55PFI is sourced from the original manufacturer or authorized distributors?
All 7024L55PFI 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 7024L55PFI meets industry standards.
7.What is the process for return or replacement of 7024L55PFI?
All 7024L55PFI units undergo pre-shipment inspection (PSI). If there is an issue with 7024L55PFI, 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 7024L55PFI part is unused and in its original packaging.
Return procedure for 7024L55PFI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7024L55PFI 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
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