My Inquiry
My Account
Renesas 7005S25J8
- Part No.:
- 7005S25J8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
7005S25J8.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 68PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,021
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
7005S25J8 from IDT is a high-speed 8K × 8 dual-port static RAM with true independent left/right ports, 25 ns max read cycle time (tRC), TTL-compatible 5 V ±10% supply, and integrated hardware semaphore/arbitration logic. It enables simultaneous asynchronous access to the same memory location-used in real-time inter-processor communication, video frame buffers, and military-grade avionics data exchange.
For engineers reviewing the 7005S25J8 datasheet, 7005S25J8 pinout, 7005S25J8 application, or 7005S25J8 equivalent, key selection criteria include BUSY-flag arbitration timing (tBDD ≤ 30 ns), dual-port power-down control via CE, and 64-pin TQFP package compatibility with industrial temperature range (–40°C to +85°C).
Technical Context
The 7005S25J8 implements fully asynchronous dual-port architecture with separate address, data, and control buses for left (L) and right (R) ports. Its on-chip arbitration logic resolves port contention using either chip-enable (CE)-driven or address-match-driven BUSY assertion, with tAPS = 5 ns priority setup time.
It supports two operational modes: standalone 8K × 8 memory or master/slave cascaded configuration for 16-bit+ word systems. Semaphore signaling uses A0–A2 to select one of eight flags, accessed via I/O0–I/O7 with dedicated SEM pins and non-tri-stated push-pull INT/BUSY outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 8K × 8 bits (64 Kbit total), dual-port SRAM with independent L/R address/data/control paths |
| Access Time (tRC) | 25 ns max - guarantees full-speed operation in 40 MHz synchronous bus interfaces |
| Supply Voltage | 5.0 V ±10% - compatible with legacy TTL logic families without level-shifting |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments per datasheet specification |
| Power Consumption | Active: 155 mA typ (155 mW @ 5 V); Standby (ISB1): 16 mA typ - enables low-idle-power system design |
| Package | 64-pin thin quad flatpack (TQFP), 14 mm × 14 mm × 1.4 mm - surface-mount compatible with automated assembly |
| Bus Arbitration | Hardware-supported BUSY flag (push-pull) and semaphore logic - eliminates need for external glue logic in multi-CPU systems |
Pinout & Package
7005S25J8 is housed in a 64-pin TQFP (PNG64) package with 0.5 mm pitch, body size 14 mm × 14 mm × 1.4 mm. All VCC pins require decoupling; all GND pins must be connected to ground plane.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A12L | Left port address inputs | 13-bit address bus for left-side memory access (8K = 2¹³) |
| A0R–A12R | Right port address inputs | Independent 13-bit address bus enabling concurrent addressing |
| I/O0L–I/O7L | Left port bidirectional data | 8-bit data path; tri-stated when OEL = H or CEL = H |
| I/O0R–I/O7R | Right port bidirectional data | 8-bit data path; isolated from left port during simultaneous access |
| CEL / CER | Chip enable (L/R) | Active-low enables respective port; controls power-down entry/exit (tPU = 0 ns, tPD = 25 ns) |
| OEL / OER | Output enable (L/R) | Active-low enables data output drivers; overrides R/W state for read-only access |
| R/WL / R/WR | Read/write control (L/R) | Active-low write enable; high = read mode (no external direction control needed) |
| SEML / SEMR | Semaphore enable (L/R) | Active-low selects semaphore register access instead of memory array |
| INTL / INTR | Interrupt flag outputs | Push-pull outputs; set/cleared by writing to addresses 1FFFH/1FFEH on opposite port |
| BUSYL / BUSYR | Arbitration busy flags | Push-pull outputs (M/S = H) or inputs (M/S = L); assert during port contention to block writes |
| M/S | Master/Slave select | H = BUSY outputs asserted; L = BUSY inputs accepted - enables daisy-chained multi-device systems |
| VCC / GND | Power and ground | Multiple VCC/GND pins distributed for low-noise operation and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port memory cells | Enables simultaneous reads from both ports to the same address - no arbitration delay or data corruption |
| On-chip semaphore logic | Eight hardware semaphore flags accessible via A0–A2; eliminates software polling or external latches |
| Full hardware arbitration | BUSY flag generation via CE or address-match detection (tAPS = 5 ns) - ensures deterministic priority resolution |
| Low-power standby mode | ISB1 = 16 mA typ with TTL-level inputs - reduces system power during idle without losing data integrity |
| 2V data retention | Maintains stored data at VCC = 2 V (L-version feature retained in S-version per datasheet footnote) |
| TTL-compatible interface | VIH = 2.2 V min, VIL = 0.8 V max - interoperable with 5 V microcontrollers, FPGAs, and ASICs without translators |
Applications
| Real-Time Inter-Processor Communication | Video Frame Buffering |
|---|---|
|
Use Scenario: Two independent CPUs exchange sensor data and control commands in hard real-time embedded systems (e.g., flight control units). IC Role / Device Role / Timing Role: Shared memory buffer with hardware semaphore and BUSY arbitration prevents race conditions during concurrent access. Use Value: Eliminates need for external arbitration logic; 25 ns tRC enables sub-40 ns inter-CPU handshaking latency. |
Use Scenario: Capturing and displaying progressive-scan video at 60 fps with minimal frame tearing in industrial vision systems. IC Role / Device Role / Timing Role: Dual-port RAM acts as ping-pong frame buffer - one port writes incoming frames while the other reads for display. Use Value: Simultaneous read/write avoids memory bottlenecks; 8K × 8 capacity supports 640×480 monochrome frame storage. |
| Military Avionics Data Exchange | Industrial PLC Memory Coherency |
|
Use Scenario: Mission-critical avionics subsystems (e.g., radar processing and navigation fusion) requiring MIL-PRF-38535-compliant components. IC Role / Device Role / Timing Role: High-reliability dual-port SRAM with –55°C to +125°C extended temp option (per family spec) and >200 V ESD tolerance. Use Value: Qualified for harsh environments; BUSY arbitration ensures deterministic response under electromagnetic interference. |
Use Scenario: Programmable logic controllers synchronizing I/O scan cycles between main CPU and safety-monitoring co-processor. IC Role / Device Role / Timing Role: Shared memory with interrupt flag (INTL/INTR) signals state changes between control domains without polling overhead. Use Value: Reduces inter-processor latency to <20 ns (tINS = 20 ns max); supports deterministic cyclic execution in SIL2-certified systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C136-25JC | 25 ns tRC, 8K × 8, 68-pin PLCC; higher active current (200 mA typ); no M/S pin - requires external arbitration logic | Lacks master/slave cascade capability; limited to standalone use or FPGA-managed arbitration | Choose when PLCC package is required and system FPGA handles semaphore/BUSY logic. |
| AS7C38097A-25JC | 25 ns tRC, 8K × 8, 64-pin TQFP; CMOS input thresholds (VIH = 3.5 V); ISB1 = 5 µA (lower than 7005S25J8's 16 mA) | Not TTL-compatible - requires level translation with 5 V microcontrollers; no built-in semaphore logic | Choose for ultra-low-power battery-backed systems where external semaphore management is acceptable. |
Compared with CY7C136-25JC and AS7C38097A-25JC, the 7005S25J8 uniquely integrates M/S-selectable BUSY arbitration and hardware semaphores in a TTL-compatible 64-pin TQFP, reducing BOM count and PCB area in multi-processor designs.
Availability
7005S25J8 is available at Aetrix Electronics and suitable for real-time inter-processor communication, video frame buffering, and military avionics data exchange requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for 7005S25J8 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 IDT7005 product line was designed for high-reliability dual-ported memory applications in aerospace, defense, and industrial automation-emphasizing deterministic arbitration, low-latency access, and seamless master/slave scalability.
FAQ
What is the maximum operating speed of the 7005S25J8?
The 7005S25J8 has a maximum read cycle time (tRC) of 25 ns, supporting up to 40 MHz effective memory bandwidth. This is validated across the industrial temperature range (–40°C to +85°C) with 5.0 V ±10% supply, and applies to both left and right ports independently per the AC Electrical Characteristics table.
Does the 7005S25J8 support battery backup operation?
Yes, the 7005S25J8 supports data retention at VCC = 2.0 V, maintaining stored memory contents with ICCDR ≤ 4000 µA (military/industrial grade). This capability is inherited from the IDT7005L family and confirmed in the Data Retention Characteristics table (tCDR = 0 ns, VDR = 2.0 V).
How does the M/S pin affect BUSY signal behavior on the 7005S25J8?
When M/S = H, BUSYL and BUSYR are push-pull outputs asserting during port contention; when M/S = L, they become inputs accepting external BUSY signals from a master device. This enables hierarchical arbitration in multi-device configurations without external logic, as defined in Pin Names Table and Truth Table I.
Can the 7005S25J8 be used in a 16-bit data bus configuration?
Yes - the 7005S25J8 supports 16-bit expansion via master/slave cascading using the M/S pin. Two devices can be configured such that the master's BUSY output controls the slave's BUSY input, enabling full-speed error-free 16-bit word access without additional discrete logic, as described in the Functional Block Diagram and Description section.
What are the key differences between the 7005S25J8 and the 7005L25J8?
The 7005S25J8 (S-version) has higher active power (155 mA typ) but identical 25 ns timing and pinout versus the 7005L25J8 (L-version), which offers lower standby current (ISB1 = 10 µA typ) and optimized battery-retention performance. Both share the same 64-pin TQFP package and industrial temperature rating.
7005S25J8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 68-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:
- 8K 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)
7005S25J8 FAQ
1.How can I place an order for 7005S25J8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7005S25J8 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 7005S25J8 reliable?
The price and inventory of 7005S25J8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7005S25J8 is usually 5 days.
3.What payment methods are accepted for 7005S25J8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7005S25J8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7005S25J8?
7005S25J8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7005S25J8 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 7005S25J8?
For technical support, including 7005S25J8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7005S25J8 requirements.
6.How does Aetrix verify that 7005S25J8 is sourced from the original manufacturer or authorized distributors?
All 7005S25J8 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 7005S25J8 meets industry standards.
7.What is the process for return or replacement of 7005S25J8?
All 7005S25J8 units undergo pre-shipment inspection (PSI). If there is an issue with 7005S25J8, 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 7005S25J8 part is unused and in its original packaging.
Return procedure for 7005S25J8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7005S25J8 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
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
