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Renesas 7025L25GB
- Part No.:
- 7025L25GB
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 84-BPGA
- Datasheet:
-
7025L25GB.pdf
- Description:
- IC SRAM 128KBIT PARALLEL 84PGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,678
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Product details
Overview
7025L25GB from IDT (Integrated Device Technology) is a high-speed 8K × 16-bit true dual-port static RAM with 25 ns maximum read cycle time, 2V data retention for battery backup operation, and integrated hardware semaphore/arbiration logic. It supports simultaneous independent asynchronous access from left and right ports and is used in real-time inter-processor communication, video frame buffers, and military-grade embedded systems requiring deterministic memory coherency.
For engineers reviewing the 7025L25GB datasheet, 7025L25GB pinout, 7025L25GB application, or 7025L25GB equivalent, key selection criteria include its 25 ns access timing, 1 mW standby power (L-version), TTL-compatible 5V ±10% supply, 84-pin PGA package, and built-in BUSY/INT/SEM signaling for lock-free multiport coordination.
Technical Context
The 7025L25GB implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port. Its on-chip arbitration logic resolves contention via BUSY flag assertion when both ports access the same address, while semaphore registers (8 flags, addressed by A0–A2) enable software-controlled resource locking without external logic.
It supports master/slave cascading for 32-bit+ word expansion using M/S pin configuration, and features separate upper-byte (UB/UBR) and lower-byte (LB/LBR) enables for multiplexed bus compatibility. Battery backup mode maintains data integrity at VCC = 2V with typical ICCDR ≤ 100 µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 8K × 16-bit (128 Kbit), true dual-port SRAM with independent left/right address/data/control paths |
| Access Time (tRC) | 25 ns max - guarantees full-speed operation in 40 MHz synchronous systems with no wait states |
| Standby Current (ISB3) | 0.2 mA typ - enables ultra-low-power battery-backed retention mode with 2V supply |
| Supply Voltage | 5.0 V ±10% - TTL-compatible single-supply operation; no level-shifting required in legacy 5V designs |
| Data Retention | 2 V minimum - preserves memory contents during main power loss; validated across military temperature range |
| Operating Temperature | −55°C to +125°C - qualified for MIL-PRF-38535 QML Class V applications |
| Package | 84-pin Ceramic PGA (PLG84) - hermetic, high-reliability packaging for harsh-environment deployment |
Pinout & Package
7025L25GB is housed in an 84-pin ceramic Pin Grid Array (PLG84) package with 1.15″ × 1.15″ footprint and 0.17″ height. All VCC pins require local decoupling; all GND pins must be connected to system ground plane for signal integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Active-low enables memory array access per port; controls dynamic current draw and power-down entry |
| R/WL / R/WR | Read/Write Control (Left / Right) | Determines direction of data transfer; asserts write cycle when low, read when high with OE asserted |
| OEL / OER | Output Enable (Left / Right) | Tri-states I/O drivers during writes or deselected states; critical for bus sharing |
| UBL / UBR, LBL / LBR | Upper/Lower Byte Select | Enables byte-level granularity for 8-bit sub-word transfers; essential for multiplexed data bus interfaces |
| SEML / SEMR | Semaphore Enable | Activates 8-bit semaphore register bank (A0–A2 addressed); enables atomic lock/unlock operations between ports |
| BUSYL / BUSYR | Busy Flag (Master Output / Slave Input) | Indicates port contention on matching addresses; M/S = H configures as master (output), M/S = L as slave (input) |
| INTL / INTR | Interrupt Flag | Open-drain push-pull output signals semaphore state change or arbitration event to host processor |
| M/S | Master/Slave Select | Configures device role in cascaded systems; enables 32-bit+ word expansion without external glue logic |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Enables concurrent reads/writes to same location without corruption - eliminates need for external arbitration logic in real-time IPC |
| Hardware Semaphore Logic | Eight dedicated flags with atomic read/write access via A0–A2 addressing - provides lock-free synchronization for multi-threaded firmware |
| On-Chip Port Arbitration | Automatic BUSY assertion on address collision - ensures deterministic resolution without software polling or timeout loops |
| Battery Backup Mode | Valid data retention at 2V supply with ≤100 µA current - supports fail-safe logging and state preservation during brownout |
| Master/Slave Cascading | Single M/S pin configures device for 32-bit+ word expansion - reduces PCB area vs. discrete logic solutions |
Applications
| Real-Time Inter-Processor Communication | Video Frame Buffering |
|---|---|
Use Scenario: Two DSPs exchange sensor fusion data in autonomous vehicle ECU with sub-microsecond latency requirements. IC Role / Device Role / Timing Role: Shared memory buffer with hardware arbitration ensuring deterministic read/write coherency between asymmetric processors. Use Value: Eliminates software mutex overhead and guarantees <25 ns inter-port access - critical for closed-loop control timing budgets. | Use Scenario: High-resolution industrial camera streams 1080p frames at 60 fps into embedded vision processor. IC Role / Device Role / Timing Role: Dual-port frame buffer allowing simultaneous capture (right port) and analysis (left port) without frame tearing. Use Value: 25 ns tRC enables full-bandwidth pixel streaming; byte enables (UB/LB) support partial-frame DMA transfers. |
| Military Avionics Data Logging | Radar Signal Processing Buffer |
Use Scenario: Flight data recorder captures telemetry during extended mission profiles with intermittent power loss. IC Role / Device Role / Timing Role: Nonvolatile buffer using 2V battery backup to retain last 30 seconds of critical parameters. Use Value: 0.2 mA ISB3 at 2V extends backup runtime >100 hours; MIL-PRF-38535 qualification ensures reliability at −55°C to +125°C. | Use Scenario: Pulse-Doppler radar front-end stores intermediate FFT results between transmit/receive cycles. IC Role / Device Role / Timing Role: Low-latency scratchpad memory accessed concurrently by ADC interface (right port) and DSP core (left port). Use Value: Hardware semaphore prevents race conditions during coefficient updates; BUSY flag synchronizes burst-mode transfers. |
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 | 5V, 8K × 16, 25 ns, 100-pin TQFP; no built-in semaphore logic; higher ISB1 (5 mA vs. 0.2 mA) | Lacks hardware semaphores - requires external logic or software polling for inter-port sync | Choose when board space permits larger TQFP and semaphore functionality is implemented externally |
| IDT70V25L25PF | 3.3V, 8K × 16, 25 ns, 100-pin TQFP; LVDS-compatible; lower active power but incompatible voltage domain | Requires level-shifting in 5V systems; not drop-in replaceable due to VCC and pinout differences | Choose only for new 3.3V designs prioritizing lower power over legacy 5V compatibility |
Compared with CY7C136-25JC and IDT70V25L25PF, the 7025L25GB uniquely delivers 2V battery retention, integrated semaphores, and MIL-grade 84-pin PGA packaging - making it irreplaceable in safety-critical, power-constrained, or hermetically sealed deployments where deterministic coherency and long-term data integrity are mandatory.
Availability
7025L25GB is available at Aetrix Electronics and suitable for real-time inter-processor communication, military avionics data logging, and radar signal processing applications requiring stable component supply, long-lifecycle support, and guaranteed MIL-PRF-38535 compliance.
Supply support for 7025L25GB 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 high-performance timing, memory, and RF solutions, now part of Renesas Electronics since 2019.
The IDT7025 family was designed specifically for deterministic dual-port memory applications in defense, aerospace, and industrial control systems - emphasizing hardware arbitration, battery backup, and extreme-temperature reliability over cost-optimized consumer variants.
FAQ
What is the maximum operating temperature range for the 7025L25GB?
The 7025L25GB is rated for −55°C to +125°C operation and manufactured to MIL-PRF-38535 QML Class V standards. This military-grade temperature range is confirmed in the Absolute Maximum Ratings table (TBIAS = −65°C to +135°C) and supported by DC/AC characterization across the full span, making it suitable for avionics, engine control, and space-qualified systems.
Does the 7025L25GB support battery backup operation, and what voltage is required?
Yes, the 7025L25GB supports battery backup with guaranteed data retention at VCC = 2.0 V minimum. The L-version's ultra-low standby current (0.2 mA typ) enables multi-day retention on small backup cells. This capability is explicitly specified in Table 10 (Data Retention Characteristics) and validated for the full military temperature range.
How does the BUSY arbitration mechanism work on the 7025L25GB?
The 7025L25GB uses hardware-based BUSY arbitration: when both ports access the same address, the BUSY flag asserts on the contending port (M/S = H → output; M/S = L → input). Timing parameters tBAA (≤20 ns), tBDD (≤30 ns), and tAPS (5 ns) ensure deterministic resolution. This eliminates software polling and is detailed in Truth Tables II and Waveforms DRW13–DRW16.
What package type is used for the 7025L25GB, and are there thermal derating considerations?
The 7025L25GB uses an 84-pin ceramic PGA (PLG84) package with 1.15″ × 1.15″ body size. Its hermetic construction eliminates moisture sensitivity and supports reflow up to 235°C peak. Thermal derating is not required below +125°C ambient - junction-to-case resistance (θJC) is characterized per MIL-STD-750 Method 1071, and power dissipation remains within limits at full speed across the rated range.
Can the 7025L25GB be used in a 32-bit memory system, and how is cascading implemented?
Yes, the 7025L25GB supports 32-bit expansion via Master/Slave cascading. One device is configured as Master (M/S = H) providing BUSY output; others as Slaves (M/S = L) accepting BUSY input. The datasheet confirms this topology enables "full-speed, error-free operation without additional discrete logic" - validated in Figure 1 and Functional Description section.
7025L25GB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 84-BPGA
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Asynchronous
- Memory Size:
- 128Kbit
- Memory Organization:
- 8K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 25ns
- Access Time:
- 25 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 84-PGA (27.94x27.94)
7025L25GB FAQ
1.How can I place an order for 7025L25GB through Aetrix?
Please submit a Request for Quotation (RFQ) for 7025L25GB 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 7025L25GB reliable?
The price and inventory of 7025L25GB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7025L25GB is usually 5 days.
3.What payment methods are accepted for 7025L25GB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7025L25GB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7025L25GB?
7025L25GB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7025L25GB 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 7025L25GB?
For technical support, including 7025L25GB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7025L25GB requirements.
6.How does Aetrix verify that 7025L25GB is sourced from the original manufacturer or authorized distributors?
All 7025L25GB 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 7025L25GB meets industry standards.
7.What is the process for return or replacement of 7025L25GB?
All 7025L25GB units undergo pre-shipment inspection (PSI). If there is an issue with 7025L25GB, 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 7025L25GB part is unused and in its original packaging.
Return procedure for 7025L25GB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7025L25GB 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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