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Renesas 7024L35FB
- Part No.:
- 7024L35FB
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 84-FlatPack
- Datasheet:
-
7024L35FB.pdf
- Description:
- IC SRAM 64KBIT PAR 84FLATPAK
- Quantity:
- Payment:
- Shipping:
Inventory:1,950
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Product details
Overview
7024L35FB from IDT is a high-speed 4K × 16 true dual-port static RAM with independent left/right ports, 35 ns max read cycle time (tRC), TTL-compatible 5V ±10% supply, and battery backup data retention down to 2V. It supports simultaneous reads of the same memory location and is used in real-time inter-processor communication systems requiring deterministic arbitration and semaphore signaling.
For engineers reviewing the 7024L35FB datasheet, 7024L35FB pinout, 7024L35FB application, or 7024L35FB equivalent, this page delivers verified timing specs (tAA ≤35 ns, tPD ≤35 ns), standby current (ISB3 = 0.2 mA typ), dual-port arbitration behavior, and package-specific terminal mapping for PGA84 and TQFP100 variants.
Technical Context
The 7024L35FB implements full on-chip hardware semaphore logic with eight flags addressable via A0–A2, enabling atomic resource locking between asynchronous processors. Its port arbitration resolves contention without external logic using BUSY flag handshaking and M/S-selectable master/slave configuration.
It operates fully asynchronously from either port, supports separate upper-byte (UB/UBR) and lower-byte (LB/LBR) control for multiplexed bus compatibility, and enters ultra-low-power standby (≤0.2 mA) when both chip enables are deasserted with CMOS-level inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 16 bits (64 Kbit), true dual-port SRAM with independent address/data/control per port |
| Max Read Cycle Time (tRC) | 35 ns - defines minimum time between successive read operations on same port |
| Address Access Time (tAA) | 35 ns max - delay from stable address to valid data output, critical for timing-critical host interfaces |
| Standby Current (ISB3) | 0.2 mA typical - power consumed when both ports disabled with CMOS-level inputs, enabling battery backup |
| Data Retention Voltage | 2.0 V min - maintains stored data during brownout or backup battery operation |
| Operating Temperature | –40°C to +85°C - industrial-grade thermal range validated for embedded control and avionics |
| Supply Voltage | 4.5 V to 5.5 V - TTL-compatible single 5V rail, no auxiliary supplies required |
Pinout & Package
7024L35FB is available in 84-pin PGA (GU84) and 100-pin TQFP (PNG100) packages. Pin functions are identical across packages; physical layout differs per mechanical drawing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A11L / A0R–A11R | Address Inputs (Left/Right) | 12-bit address per port; enables independent access to any of 4K locations on each side |
| I/O0L–I/O15L / I/O0R–I/O15R | Bidirectional Data (Left/Right) | 16-bit parallel data path per port; supports simultaneous read/write across ports |
| CEL / CER | Chip Enable (Left/Right) | Active-low enable per port; controls power state and port activation independently |
| R/WL / R/WR | Read/Write Control (Left/Right) | Active-low write enable; determines direction of data transfer on respective port |
| UBL / UBR / LBL / LBR | Byte Select (Upper/Lower) | Enables 8-bit granularity writes; allows partial-word updates without disturbing adjacent bytes |
| SEML / SEMR | Semaphore Enable (Left/Right) | Activates on-chip semaphore register access (A0–A2) for inter-processor synchronization |
| BUSYL / BUSYR | Busy Flag (Master Output / Slave Input) | M/S = H: BUSY is output indicating port contention; M/S = L: BUSY is input for slave coordination |
| INTL / INTR | Interrupt Flag (Left/Right) | Open-drain push-pull interrupt output signals semaphore or arbitration events to host processor |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Simultaneous independent read/write access to same or different addresses on left/right ports without conflict |
| On-Chip Semaphore Logic | Eight hardware semaphore flags accessible via A0–A2; eliminates need for external lock registers or software polling |
| Master/Slave Cascading | M/S pin configures device as master (BUSY output) or slave (BUSY input), enabling error-free 32-bit+ bus expansion |
| Battery Backup Support | Retains data at VCC = 2.0 V with ISB3 ≤ 0.2 mA, enabling seamless transition to backup power during main supply loss |
| Full Asynchronous Operation | No clock required; all timing defined by setup/hold and access parameters (tAS, tAH, tAA, tOH), simplifying interface design |
Applications
| Real-Time Inter-Processor Communication | Digital Signal Processing Buffering |
|---|---|
|
Use Scenario: Two microcontrollers exchange sensor fusion data and control commands in hard real-time loop. IC Role / Device Role / Timing Role: Shared memory buffer with hardware semaphore arbitration prevents race conditions during concurrent access. Use Value: Eliminates software mutex overhead and guarantees sub-35 ns memory access latency for deterministic response. |
Use Scenario: DSP core streams audio samples to FPGA-based filter engine while host CPU loads new coefficients. IC Role / Device Role / Timing Role: Dual-port SRAM acts as zero-wait-state ping-pong buffer between asynchronous processing domains. Use Value: Enables continuous data flow without pipeline stalls; 35 ns tRC supports >28 MHz sustained throughput per port. |
| Avionics Flight Control Interface | Industrial PLC Redundancy Module |
|
Use Scenario: Safety-critical flight computer shares telemetry and actuator commands with backup controller via shared memory. IC Role / Device Role / Timing Role: Master/slave configured 7024L35FB ensures primary system controls arbitration while backup monitors status. Use Value: Hardware BUSY flag and tBDD ≤35 ns guarantee fail-safe handover within defined safety window. |
Use Scenario: Redundant PLC CPUs maintain synchronized I/O state using shared memory with atomic flag updates. IC Role / Device Role / Timing Role: On-chip semaphore registers provide lock-free synchronization for process image updates. Use Value: Prevents inconsistent state during switchover; 5 ns tSPS ensures reliable flag acquisition under worst-case timing skew. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C133-35JC | 35 ns tRC, 4K × 16, but uses 3.3V supply and lacks native 2V data retention | Requires level-shifting for 5V systems; unsuitable for battery-retention designs | Select only if migrating to 3.3V architecture and external retention circuitry is acceptable |
| IDT7025L35PF | Same 4K × 16 organization and 35 ns speed, but in 100-pin PQFP (not TQFP); higher ISB3 (0.5 mA typ) | Pin-compatible with 7024L35FB in TQFP footprint but requires PCB revision for PQFP | Consider for legacy board reuse where PQFP is already populated; verify thermal derating for industrial temp |
Compared with CY7C133-35JC and IDT7025L35PF, the 7024L35FB uniquely combines 5V TTL compatibility, 2V data retention, and M/S-configurable master/slave operation-making it irreplaceable in mixed-voltage, battery-backed, or cascaded dual-processor systems.
Availability
7024L35FB is available at Aetrix Electronics and suitable for real-time inter-processor communication, avionics data exchange, and industrial redundancy modules requiring stable component supply across extended product lifecycles.
Supply support for 7024L35FB 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.
The 7024L35FB belongs to IDT's legacy high-speed dual-port SRAM family, designed specifically for deterministic inter-processor communication in military, industrial, and aerospace systems demanding hardware arbitration and low-power retention.
FAQ
What is the maximum operating temperature range for the 7024L35FB?
The 7024L35FB is rated for industrial temperature operation from –40°C to +85°C, as confirmed in the Absolute Maximum Ratings table and supported by DC/AC characterization across this range. This makes it suitable for under-hood automotive ECUs, factory-floor controllers, and outdoor communications equipment where ambient thermal stress is significant.
Does the 7024L35FB support true simultaneous read operations on both ports?
Yes, the 7024L35FB features true dual-ported memory cells that allow concurrent reads from the same or different addresses on left and right ports without contention or arbitration delay. This capability is explicitly stated in the Features section and verified by the functional block diagram showing independent I/O control paths per port.
How does the M/S pin affect BUSY signal behavior in the 7024L35FB?
When M/S = H, the 7024L35FB operates as a master and drives BUSYL/BUSYR as outputs indicating port contention; when M/S = L, it operates as a slave and accepts BUSYL/BUSYR as inputs for coordinated access. This dual-mode behavior is documented in Note 1 of the Functional Block Diagram and Truth Table I.
What is the minimum supply voltage required to retain data in the 7024L35FB?
The 7024L35FB guarantees data retention down to VCC = 2.0 V, as specified in the Data Retention Characteristics table (VDR = 2.0 V min). This applies only to the 'L' (low-power) version and enables operation from backup batteries or brownout conditions without data loss.
Can the 7024L35FB be used in a 32-bit data bus configuration?
Yes, the 7024L35FB supports 32-bit expansion via master/slave cascading: two devices are connected with M/S pins set to H (master) and L (slave), using BUSY handshaking to coordinate access. This method is explicitly described in the first bullet of the Features section and enables full-speed, error-free 32-bit word systems without external logic.
7024L35FB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 84-FlatPack
- 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:
- 35ns
- Access Time:
- 35 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 84-FPACK
7024L35FB FAQ
1.How can I place an order for 7024L35FB through Aetrix?
Please submit a Request for Quotation (RFQ) for 7024L35FB 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 7024L35FB reliable?
The price and inventory of 7024L35FB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7024L35FB is usually 5 days.
3.What payment methods are accepted for 7024L35FB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7024L35FB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7024L35FB?
7024L35FB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7024L35FB 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 7024L35FB?
For technical support, including 7024L35FB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7024L35FB requirements.
6.How does Aetrix verify that 7024L35FB is sourced from the original manufacturer or authorized distributors?
All 7024L35FB 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 7024L35FB meets industry standards.
7.What is the process for return or replacement of 7024L35FB?
All 7024L35FB units undergo pre-shipment inspection (PSI). If there is an issue with 7024L35FB, 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 7024L35FB part is unused and in its original packaging.
Return procedure for 7024L35FB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7024L35FB 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
-
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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