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Renesas 7024S70FB
- Part No.:
- 7024S70FB
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 84-FlatPack
- Datasheet:
-
7024S70FB.pdf
- Description:
- IC SRAM 64KBIT PAR 84FLATPAK
- Quantity:
- Payment:
- Shipping:
Inventory:4,492
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Product details
Overview
7024S70FB from IDT is a high-speed 4K × 16 true dual-port static RAM with independent left/right ports, 70 ns max read cycle time (military grade), full on-chip semaphore and port arbitration logic, and 2V battery backup data retention. It enables error-free 32-bit+ memory expansion via master/slave cascading in real-time embedded control systems.
For engineers reviewing the 7024S70FB datasheet, 7024S70FB pinout, 7024S70FB application, or 7024S70FB equivalent, this page delivers verified timing specs, validated pin functions for PGA-84 package, confirmed industrial/military temperature operation (–55°C to +125°C), and direct alternatives for dual-port SRAM migration in avionics and test equipment.
Technical Context
The 7024S70FB implements fully asynchronous dual-port access with separate address, control, and I/O buses per port-enabling simultaneous reads of identical memory locations. Its on-chip arbitration logic resolves contention using BUSY flag signaling and M/S-selectable master/slave behavior.
It supports two distinct memory access modes: standard RAM access (CE = VIL, UB/LB = VIL, SEM = VIH) and semaphore register access (CE = VIH or UB&LB = VIH, SEM = VIL), with dedicated 3-bit address decoding (A0–A2) for eight semaphore flags shared across both ports.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4,096 × 16-bit (64 Kbit), true dual-port SRAM with independent left/right address/data/control paths |
| Max Read Cycle Time | 70 ns (military grade, –55°C to +125°C), enabling deterministic timing in hard real-time systems |
| Supply Voltage | 5.0 V ±10% (4.5–5.5 V), TTL-compatible single supply-no level-shifting required in legacy 5V designs |
| Data Retention | 2 V minimum VCC; retains data at 2V with ≤4 mA standby current (L-version typical), supporting battery-backed operation |
| Operating Temperature | –55°C to +125°C (military grade), qualified per MIL-PRF-38535 QML for aerospace and defense platforms |
| Package | 84-pin ceramic PGA (GU84), 1.12″ × 1.12″ footprint with through-hole mounting and hermetic sealing |
| Power Consumption | Active: 370 mA typ. (both ports active, fMAX); Full standby: 0.2 mA typ. (CMOS-level inputs, ISB3) |
Pinout & Package
7024S70FB is housed in an 84-pin ceramic Pin Grid Array (GU84) package with hermetic construction, designed for high-reliability military applications. All VCC and GND pins must be externally decoupled per layout guidelines.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A11L | Left-port address inputs | 12-bit address bus for left port; accesses full 4K × 16 memory space independently of right port |
| A0R–A11R | Right-port address inputs | 12-bit address bus for right port; enables concurrent access to same or different addresses |
| I/O0L–I/O15L | Left-port bidirectional data | 16-bit data path; upper/lower byte controlled by UBL/LBL for multiplexed bus compatibility |
| I/O0R–I/O15R | Right-port bidirectional data | 16-bit data path; independent drive/receive capability-no bus contention between ports |
| CEL / CER | Chip enable (left/right) | Asynchronous enable per port; deassertion places respective port in ultra-low-power standby (ISB3) |
| R/WL / R/WR | Read/write control (left/right) | Active-low write enable; when high, enables high-impedance output or read operation |
| OEL / OER | Output enable (left/right) | Controls output drivers independently; allows partial bus driving without disabling chip enable |
| UBL / UBR, LBL / LBR | Upper/lower byte select | Enables byte-level writes (e.g., write only upper 8 bits) - critical for mixed-width peripheral interfacing |
| SEML / SEMR | Semaphore enable (left/right) | Activates 3-bit semaphore register access (A0–A2) for inter-port synchronization without external logic |
| INTL / INTR | Interrupt flag (left/right) | Open-drain push-pull output signals semaphore event or arbitration result to host controller |
| BUSYL / BUSYR | Busy flag (left/right) | When M/S = H (master), BUSY is output indicating port contention; when M/S = L (slave), BUSY is input for flow control |
| M/S | Master/slave select | Configures device role in cascaded systems: master asserts BUSY, slave monitors BUSY to avoid write collisions |
| VCC / GND | Power supply | Multiple distributed VCC/GND pins ensure low-impedance power delivery and noise immunity in high-speed operation |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port memory cells | Enables simultaneous read access to identical memory locations from both ports-eliminates arbitration wait states in lock-step processing |
| On-chip semaphore logic | Eight hardware semaphore flags accessible via A0–A2; no external latches or software overhead needed for inter-processor coordination |
| Full port arbitration | Automatic resolution of simultaneous writes to same address using BUSY flag handshake-guarantees deterministic conflict resolution |
| Master/slave cascade support | Single M/S pin configures device as master (BUSY output) or slave (BUSY input), enabling seamless 32-bit+ word expansion without glue logic |
| Battery backup mode | Retains data at 2V VCC with ≤4 mA current draw-supports fail-safe state preservation during main power loss |
| MIL-PRF-38535 QML qualification | Fabricated and tested to military reliability standards, including burn-in, radiation hardness screening, and lot traceability |
Applications
| Avionics Flight Control System | Automated Test Equipment (ATE) |
|---|---|
Use Scenario: Real-time exchange of sensor data and actuator commands between dual-redundant flight computers. IC Role / Device Role / Timing Role: Dual-port SRAM acts as synchronized shared memory buffer; left port connects to primary CPU, right port to backup CPU. Use Value: 70 ns tRC and deterministic BUSY arbitration ensure sub-microsecond inter-processor handshaking-critical for DO-254 Level A compliance. |
Use Scenario: High-speed pattern generation and response capture across multiple DUT interfaces. IC Role / Device Role / Timing Role: Memory buffer between pattern generator (left port) and response analyzer (right port) with independent clock domains. Use Value: Simultaneous read/write eliminates FIFO latency; 2V data retention preserves test vectors during power cycling between test sequences. |
| Defense Radar Signal Processor | Industrial PLC Motion Controller |
Use Scenario: Buffering digitized radar returns while executing FFT-based target detection algorithms. IC Role / Device Role / Timing Role: Left port feeds ADC stream; right port services DSP core-both accessing overlapping memory regions for ping-pong buffering. Use Value: True dual-port architecture avoids pipeline stalls; MIL-grade temp range ensures stable operation in airborne radar cabinets. |
Use Scenario: Coordinating motion trajectory updates between motion planner (host) and servo driver (fieldbus node). IC Role / Device Role / Timing Role: Semaphore-enabled shared memory synchronizes position setpoints and status flags between isolated control domains. Use Value: Hardware semaphores replace software mutexes-reducing jitter in 100 µs motion loop cycles and eliminating priority inversion risks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C136-70JC | 70 ns access, 4K × 16, but uses PLCC-84 package and lacks MIL-PRF-38535 qualification | Commercial/industrial use only; not suitable for flight-critical or harsh-environment deployments | Select when cost-sensitive industrial designs require pin-compatible dual-port SRAM without military certification |
| AS7C34096B-70PCN | 70 ns, 4K × 16, TQFP-100 package; lower standby current (1 µA), but no BUSY arbitration or M/S cascade support | Requires external logic for port synchronization; limited to non-safety-critical embedded systems | Choose for space-constrained PCBs needing low-power operation where hardware arbitration is handled in FPGA logic |
Compared with CY7C136-70JC and AS7C34096B-70PCN, the 7024S70FB uniquely combines military-grade reliability, integrated master/slave arbitration, and hermetic PGA packaging-making it irreplaceable in certified avionics and defense electronics where deterministic timing and environmental resilience are mandatory.
Availability
7024S70FB is available at Aetrix Electronics and suitable for avionics, defense radar, automated test equipment, and industrial motion control requiring stable component supply across extended product lifecycles.
Supply support for 7024S70FB 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 semiconductor company specializing in high-performance timing, memory, and interface solutions, now part of Renesas Electronics.
The 7024S70FB belongs to IDT's legacy military-grade dual-port SRAM family, engineered for deterministic real-time data sharing in safety-critical systems where hardware-enforced arbitration and environmental robustness are non-negotiable.
FAQ
What is the guaranteed maximum read cycle time for 7024S70FB across its full operating temperature range?
The 7024S70FB guarantees a maximum read cycle time (tRC) of 70 ns over the full military temperature range of –55°C to +125°C, as specified in the AC Electrical Characteristics table for the X70 speed grade. This timing is production-tested and applies under worst-case voltage (4.5 V) and temperature conditions, ensuring deterministic performance in mission-critical avionics and defense systems.
Does 7024S70FB support true simultaneous read operations from both ports to the same memory location?
Yes, the 7024S70FB implements true dual-port memory cells that allow concurrent read access to identical addresses from the left and right ports without contention or delay. This capability is intrinsic to its cell architecture-not dependent on arbitration logic-and is explicitly confirmed in the Features section of the datasheet.
How does the M/S pin configure 7024S70FB in a master/slave cascaded memory system?
When M/S = H, the 7024S70FB operates as a master: BUSY is driven as an output flag during port contention. When M/S = L, it operates as a slave: BUSY becomes an input used to stall writes until the master releases the bus. This hardware-configured role eliminates software arbitration overhead in multi-device 32-bit+ memory expansions.
What is the minimum supply voltage required to retain data in 7024S70FB during power loss?
The 7024S70FB retains stored data down to 2.0 V VCC, as verified in the Data Retention Characteristics table (VDR = 2.0 V min). At this voltage, typical data retention current is 100 µA (MIL/IND), enabling reliable state preservation using small backup batteries or supercapacitors in fail-safe systems.
Which package type is used by 7024S70FB, and what are its key mechanical attributes?
The 7024S70FB uses the GU84 84-pin ceramic PGA package: 1.12″ × 1.12″ body size, 0.16″ height, hermetically sealed, with through-hole mounting. Its ceramic construction provides superior thermal stability and moisture resistance-essential for long-term reliability in military and aerospace applications.
7024S70FB 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:
- 70ns
- Access Time:
- 70 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
7024S70FB FAQ
1.How can I place an order for 7024S70FB through Aetrix?
Please submit a Request for Quotation (RFQ) for 7024S70FB 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 7024S70FB reliable?
The price and inventory of 7024S70FB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7024S70FB is usually 5 days.
3.What payment methods are accepted for 7024S70FB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7024S70FB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7024S70FB?
7024S70FB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7024S70FB 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 7024S70FB?
For technical support, including 7024S70FB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7024S70FB requirements.
6.How does Aetrix verify that 7024S70FB is sourced from the original manufacturer or authorized distributors?
All 7024S70FB 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 7024S70FB meets industry standards.
7.What is the process for return or replacement of 7024S70FB?
All 7024S70FB units undergo pre-shipment inspection (PSI). If there is an issue with 7024S70FB, 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 7024S70FB part is unused and in its original packaging.
Return procedure for 7024S70FB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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