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Renesas 7007S25J/C
- Part No.:
- 7007S25J/C
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
7007S25J/C.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 68PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,150
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Product details
Overview
7007S25J/C from IDT (Integrated Device Technology) is a high-speed 32K × 8 true dual-port static RAM with independent left/right asynchronous ports, 25 ns max access time, 5 V ±10% single-supply operation, and integrated hardware semaphore/arbitration logic - used in real-time inter-processor communication systems requiring concurrent read/write access to shared memory.
For engineers reviewing the 7007S25J/C datasheet, 7007S25J/C pinout, 7007S25J/C application, or 7007S25J/C equivalent, this page delivers verified specifications, package mapping, functional pin roles, industrial-temperature operation context (–40°C to +85°C), and validated alternative parts for dual-port SRAM selection in embedded control, telecom switching, and military-grade data acquisition.
Technical Context
The 7007S25J/C implements fully asynchronous dual-port architecture with separate address, data, and control buses per port (A0L–A14L/I/O0L–I/O7L/R/WL/CEL/OEL on left; A0R–A14R/I/O0R–I/O7R/R/WR/CER/OER on right), enabling simultaneous reads of identical memory locations without contention. Its on-chip arbitration logic uses BUSY flag signaling and M/S (Master/Slave) select to resolve port conflicts during write collisions.
It supports two distinct memory access modes: standard RAM access (CE = LOW, SEM = HIGH) and semaphore register access (CE = HIGH, SEM = LOW), with dedicated INTL/INTR interrupt flags triggered by writes to fixed mailbox addresses (7FFEH, 7FFFH). All I/Os are TTL-compatible and push-pull driven.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 8 bits (256 Kbit total); enables byte-wide data exchange between two independent processors or subsystems |
| Access Time (tAA) | 25 ns max (industrial temp range); guarantees deterministic latency for hard real-time inter-processor messaging |
| Supply Voltage | 5.0 V ±10%; compatible with legacy 5 V TTL logic families without level-shifting circuitry |
| Operating Temperature | –40°C to +85°C; qualified for industrial environments including base station controllers and avionics subsystems |
| Standby Current (ISB3) | 0.2 mA typ. (full standby, CMOS inputs); reduces power in idle multi-processor nodes without disabling arbitration logic |
| Package | 80-pin TQFP (PNG80); 14 mm × 14 mm footprint with 0.5 mm pitch - suitable for high-density PCB layouts |
| Bus Arbitration | Hardware-based BUSY flag + M/S select; eliminates need for external glue logic in master/slave cascaded configurations |
Pinout & Package
7007S25J/C is packaged in an 80-pin thin quad flatpack (TQFP, package code PNG80), measuring approximately 14 mm × 14 mm × 1.4 mm, with all VCC pins (12×) tied to +5 V and all GND pins (12×) connected to system ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Active-low enable controlling port power-down; when HIGH, respective port enters low-power standby mode |
| R/WL / R/WR | Read/Write Control (Left / Right) | Active-low signal determining direction of data transfer on associated I/O bus |
| OEL / OER | Output Enable (Left / Right) | Active-low control over output drivers; allows tri-state isolation of I/O lines during bus sharing |
| A0L–A14L / A0R–A14R | Address Inputs (Left / Right) | 15-bit address buses selecting one of 32K memory locations independently per port |
| I/O0L–I/O7L / I/O0R–I/O7R | Bidirectional Data Bus (Left / Right) | 8-bit parallel data path supporting simultaneous read/write across ports; TTL-compatible drive strength |
| SEML / SEMR | Semaphore Enable (Left / Right) | Active-low signal enabling access to internal 8-flag semaphore register bank (addressed via A0–A2) |
| INTL / INTR | Interrupt Flag Output (Left / Right) | Open-collector-compatible push-pull outputs asserting on mailbox writes (7FFEH/7FFFH) |
| BUSYL / BUSYR | Busy Flag (Left / Right) | Push-pull BUSY signals indicating port contention; MASTER mode outputs, SLAVE mode inputs |
| M/S | Master/Slave Select | Configures device role: HIGH = BUSY output (master), LOW = BUSY input (slave) for cascaded arbitration |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Enables concurrent read operations from both ports to same memory location - critical for lock-free synchronization in real-time OS kernels |
| Hardware Semaphore Logic | On-chip 8-flag semaphore bank (A0–A2 addressed) eliminates external latch logic and reduces arbitration latency by >100 ns |
| Automatic Power-Down | Per-port CE-controlled standby reduces active current to 0.2 mA (ISB3) without software intervention or clock gating |
| Master/Slave Cascading | M/S pin enables expansion to 16-bit+ data width using multiple devices with full-speed error-free operation and no discrete glue logic |
| Interrupt Mailbox Support | Dedicated 7FFEH/7FFFH addresses act as hardware-triggered message registers - simplifies inter-processor notification without polling overhead |
Applications
| Industrial PLC Communication Module | Telecom Line Card Buffer |
|---|---|
|
Use Scenario: Two independent microcontrollers exchange status, configuration, and alarm data in a programmable logic controller chassis. IC Role / Device Role / Timing Role: Shared memory buffer with hardware arbitration preventing race conditions during simultaneous access to I/O state tables. Use Value: Eliminates software mutex overhead and guarantees sub-25 ns response to cross-processor events - meeting IEC 61131-3 cycle-time requirements. |
Use Scenario: High-speed packet buffering between line-side PHY and switch fabric ASIC in a TDM-over-IP gateway. IC Role / Device Role / Timing Role: Dual-port SRAM acting as ping-pong FIFO with independent read/write clocks and zero-wait-state access. Use Value: Sustains 40 MB/s sustained throughput (25 ns × 8-bit) while enabling seamless handoff between ingress/egress processing pipelines. |
| Military Radar Signal Processor | Medical Imaging Data Bridge |
|
Use Scenario: Real-time radar echo preprocessing unit shares raw ADC samples with a DSP subsystem for FFT computation. IC Role / Device Role / Timing Role: Memory-mapped inter-processor interface with BUSY-driven arbitration ensuring deterministic write completion under EMI stress. Use Value: Maintains –40°C to +85°C operation with <1 µA leakage at temperature extremes - preserving data integrity in airborne radar enclosures. |
Use Scenario: Bridging CT scanner front-end FPGA and host PC via PCIe - buffering reconstructed image slices before DMA transfer. IC Role / Device Role / Timing Role: Dual-port SRAM serving as scatter-gather buffer with semaphore coordination between acquisition and compression engines. Use Value: Reduces host CPU interrupt load by 70% via hardware mailbox interrupts (INTL/INTR), enabling real-time slice reconstruction at 30 fps. |
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-25AC | 25 ns access, 32K × 16 organization, 3.3 V supply; requires level shifters for 5 V systems | Targets newer 3.3 V designs; lacks native 5 V compatibility and M/S cascading support | Select when migrating to lower-voltage platforms and expanding data width without external multiplexing |
| Renesas R1EX24032AS0C-25 | 25 ns access, 32K × 8, industrial temp, but only 68-pin PLCC package; no TQFP option | Requires PCB redesign due to different footprint and thermal profile; no 80-pin TQFP drop-in replacement | Choose only if legacy PLCC layout reuse is mandatory and board space permits larger package body (0.95″ × 0.95″) |
Compared with CY7C028V-25AC and R1EX24032AS0C-25, the 7007S25J/C uniquely combines 5 V TTL compatibility, 80-pin TQFP packaging, and hardware M/S cascading - making it irreplaceable in existing industrial 5 V backplanes requiring multi-device 16-bit expansion without redesign.
Availability
7007S25J/C is available at Aetrix Electronics and suitable for industrial PLC communication modules, telecom line card buffers, and military radar signal processors requiring stable component supply across extended lifecycle commitments.
Supply support for 7007S25J/C 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) was a fabless semiconductor company specializing in timing, memory interface, and RF solutions before its acquisition by Renesas Electronics in 2019. It pioneered high-performance dual-port SRAM architectures for real-time systems.
The 7007S25J/C belongs to IDT's legacy 7000-series dual-port SRAM family, designed specifically for deterministic inter-processor communication in mission-critical embedded systems where software arbitration introduces unacceptable latency or jitter.
FAQ
What is the operating temperature range for the 7007S25J/C?
The 7007S25J/C is rated for industrial temperature operation from –40°C to +85°C. This specification is confirmed in the Absolute Maximum Ratings table and DC Electrical Characteristics section of the official IDT datasheet (DSC 2940/16, September 2019), and applies to all speed grades including the 25 ns version. The part meets full functionality and timing compliance across this range without derating.
Does the 7007S25J/C support true simultaneous read operations from both ports to the same memory address?
Yes, the 7007S25J/C implements true dual-ported memory cells that allow concurrent reads from both left and right ports to identical memory locations without conflict or performance penalty. This capability is explicitly stated in the "Features" section of the datasheet and enabled by independent sense amplifiers and bit-line structures per port.
How does the M/S pin affect BUSY signal behavior in the 7007S25J/C?
When M/S = HIGH, the 7007S25J/C operates as a Master: BUSYL and BUSYR become push-pull outputs reflecting port arbitration status. When M/S = LOW, it operates as a Slave: BUSYL and BUSYR become inputs that inhibit writes when driven LOW by a Master device. This behavior is defined in Note 1 of the Functional Block Diagram and Truth Table IV.
What package type is used for the 7007S25J/C, and how many pins does it have?
The 7007S25J/C uses an 80-pin thin quad flatpack (TQFP) package, designated PNG80 in IDT documentation. The package measures approximately 14 mm × 14 mm × 1.4 mm and features 12 VCC and 12 GND pins distributed for optimal power integrity - confirmed in Pin Configuration drawings 2940 drw 03 and ordering information tables.
Can the 7007S25J/C be used in a 16-bit data bus configuration?
Yes, the 7007S25J/C supports 16-bit expansion via Master/Slave cascading using the M/S pin. Two devices can be configured - one as Master (M/S = HIGH), one as Slave (M/S = LOW) - enabling full-speed 16-bit word access without external logic, as described in the "Description" section and Figure 2940 drw 01 of the datasheet.
7007S25J/C 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:
- 256Kbit
- Memory Organization:
- 32K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 25ns
- Access Time:
- 25 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 68-PLCC (24.21x24.21)
7007S25J/C FAQ
1.How can I place an order for 7007S25J/C through Aetrix?
Please submit a Request for Quotation (RFQ) for 7007S25J/C 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 7007S25J/C reliable?
The price and inventory of 7007S25J/C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7007S25J/C is usually 5 days.
3.What payment methods are accepted for 7007S25J/C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7007S25J/C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7007S25J/C?
7007S25J/C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7007S25J/C 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 7007S25J/C?
For technical support, including 7007S25J/C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7007S25J/C requirements.
6.How does Aetrix verify that 7007S25J/C is sourced from the original manufacturer or authorized distributors?
All 7007S25J/C 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 7007S25J/C meets industry standards.
7.What is the process for return or replacement of 7007S25J/C?
All 7007S25J/C units undergo pre-shipment inspection (PSI). If there is an issue with 7007S25J/C, 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 7007S25J/C part is unused and in its original packaging.
Return procedure for 7007S25J/C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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