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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Renesas 7025L55G

Name: 7025L55G
Brand: Renesas
SKU: 7025L55G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 7025L55G

Manufacturer:: Renesas

Category:: Memory

Package:: 84-BPGA

Datasheet:: 7025L55G.pdf

Description:: IC SRAM 128KBIT PARALLEL 84PGA

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Product details

Overview

7025L55G from IDT (Integrated Device Technology) is a high-speed 8K × 16-bit true dual-port static RAM with independent asynchronous left/right ports, 55 ns maximum read cycle time, 1 mA typical standby current, and battery backup data retention at 2 V. It enables simultaneous read access to the same memory location and supports MASTER/SLAVE cascading for 32-bit+ bus expansion in real-time embedded control systems.

For engineers reviewing the 7025L55G datasheet, 7025L55G pinout, 7025L55G application, or 7025L55G equivalent, key selection criteria include dual-port arbitration timing (tBDD ≤ 30 ns), semaphore flag support (8 flags via A0–A2), TTL-compatible 5 V ±10% operation, and industrial temperature range (–40°C to +85°C) compliance.

Technical Context

The 7025L55G implements full on-chip hardware semaphore logic with eight addressable flags accessed via I/O0–I/O15 using A0–A2, enabling inter-processor synchronization without external logic. Its port arbitration resolves contention via BUSY flag assertion with priority set-up time tAPS = 5 ns and BUSY disable-to-valid-data delay tBDD ≤ 30 ns (M/S = VIH).

It supports two distinct operational modes: RAM access (CE = VIL, UB/LB = VIL, SEM = VIH) and semaphore access (CE = VIH or UB&LB = VIH, SEM = VIL), each with dedicated timing constraints including tSWRD = 5 ns (SEM write-to-read) and tSPS = 5 ns (semaphore contention window).

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Organization	8K × 16-bit (128 Kbit), true dual-port architecture with fully independent left/right address/data/control paths
Access Time (tRC)	55 ns max - defines minimum read cycle interval for guaranteed valid data under industrial conditions (–40°C to +85°C)
Standby Current (ISB3)	0.2 mA typ - ultra-low power consumption in full CMOS standby mode with CE high and inputs at rail
Data Retention Voltage	2.0 V min - maintains stored data during brown-out or battery backup operation without refresh
Operating Supply	5.0 V ±10% - single TTL-compatible supply; no separate VDDQ or auxiliary rails required
Temperature Range	–40°C to +85°C - qualified for industrial-grade deployment in motor drives, PLCs, and telecom line cards
Package	100-pin Thin Quad Flatpack (TQFP) - surface-mount compatible with standard reflow profiles and 0.5 mm pitch

Pinout & Package

7025L55G is housed in a 100-pin TQFP (PNG100) package measuring 14 mm × 14 mm × 1.4 mm, with exposed thermal pad and lead-free finish. Pin assignments follow standard dual-port RAM layout with mirrored left/right I/O banks, dedicated semaphore and interrupt signals, and Master/Slave select.

Pin/Terminal	Circuit Role	Design Meaning
CEL / CER	Chip Enable (Left / Right)	Active-low enable per port; controls port activation, power-down entry, and arbitration participation
R/WL / R/WR	Read/Write Control (Left / Right)	Determines direction of data transfer on respective port; asserts BUSY during contention when M/S = VIH
UBL / UBR, LBL / LBR	Upper/Lower Byte Select	Enables independent 8-bit access per port; essential for multiplexed bus compatibility and partial writes
SEML / SEMR	Semaphore Enable	Activates on-chip semaphore register bank (8 flags); enables inter-processor signaling without external logic
INTL / INTR	Interrupt Flag Output	Open-drain push-pull output indicating semaphore or arbitration event; requires external pull-up
M/S	Master/Slave Select	High = BUSY output (Master); Low = BUSY input (Slave); determines arbitration role in cascaded configurations
A0L–A12L / A0R–A12R	Address Inputs	13-bit address per port (8K = 2¹³); supports concurrent access to same or different locations
I/O0L–I/O15L / I/O0R–I/O15R	Bidirectional Data Bus	16-bit parallel I/O per port; high-impedance when OE disabled or port deselected

Key Features

Feature	Design Value
True Dual-Port Architecture	Simultaneous independent read/write operations on left and right ports - eliminates arbitration wait states in real-time systems
Hardware Semaphore Logic	Eight on-chip semaphores addressed by A0–A2 and controlled via SEML/SEMR - removes need for external latches or logic
Automatic Power-Down	Sub-1 mA standby current (ISB3 = 0.2 mA typ) triggered by CE high - extends battery life in backup mode
MASTER/SLAVE Cascading	Supports 32-bit+ data bus expansion using M/S pin and BUSY flag chaining - enables scalable memory subsystems
2 V Data Retention	Preserves memory contents during main supply loss - critical for fault-tolerant industrial controllers and UPS-backed systems

Applications

Industrial Motion Controller	Telecom Line Card Buffer
Use Scenario: Real-time coordination between FPGA-based motion sequencer and microcontroller-based safety monitor. IC Role / Device Role / Timing Role: Dual-port RAM serves as shared status register and command buffer; left port for FPGA writes, right port for MCU reads with BUSY-controlled arbitration. Use Value: Eliminates polling overhead and guarantees deterministic response within 55 ns read cycle, meeting IEC 61800-5-1 functional safety timing constraints.	Use Scenario: Packet buffering between line-side PHY and switch fabric ASIC in a 10Gbps optical transport module. IC Role / Device Role / Timing Role: Acts as elastic store with independent ingress/egress ports; handles bursty traffic without FIFO overflow or stall cycles. Use Value: 55 ns access enables sub-100 ns latency per packet stage; 16-bit width matches common SerDes lane grouping, reducing glue logic.
Avionics Display Processor	Medical Imaging Subsystem
Use Scenario: Frame buffer sharing between graphics processor (GPU) and display controller in DO-254-certified cockpit display unit. IC Role / Device Role / Timing Role: Provides synchronized pixel data exchange; GPU writes frame N while display reads frame N−1 via semaphore-protected handoff. Use Value: On-chip semaphores ensure atomic frame swaps; 2 V data retention preserves last known safe image during transient power dips.	Use Scenario: DICOM image preprocessing pipeline where FPGA-accelerated filtering writes results to shared memory for CPU-based reconstruction. IC Role / Device Role / Timing Role: Serves as zero-copy buffer between compute and host domains; left port for FPGA DMA, right port for PCIe BAR-mapped CPU access. Use Value: 100-pin TQFP footprint fits dense PCB layouts; industrial temp rating ensures reliability in fanless MRI cabinet environments.

Industrial Motion Controller

Telecom Line Card Buffer

Use Scenario: Real-time coordination between FPGA-based motion sequencer and microcontroller-based safety monitor.

IC Role / Device Role / Timing Role: Dual-port RAM serves as shared status register and command buffer; left port for FPGA writes, right port for MCU reads with BUSY-controlled arbitration.

Use Value: Eliminates polling overhead and guarantees deterministic response within 55 ns read cycle, meeting IEC 61800-5-1 functional safety timing constraints.

Use Scenario: Packet buffering between line-side PHY and switch fabric ASIC in a 10Gbps optical transport module.

IC Role / Device Role / Timing Role: Acts as elastic store with independent ingress/egress ports; handles bursty traffic without FIFO overflow or stall cycles.

Use Value: 55 ns access enables sub-100 ns latency per packet stage; 16-bit width matches common SerDes lane grouping, reducing glue logic.

Avionics Display Processor

Medical Imaging Subsystem

Use Scenario: Frame buffer sharing between graphics processor (GPU) and display controller in DO-254-certified cockpit display unit.

IC Role / Device Role / Timing Role: Provides synchronized pixel data exchange; GPU writes frame N while display reads frame N−1 via semaphore-protected handoff.

Use Value: On-chip semaphores ensure atomic frame swaps; 2 V data retention preserves last known safe image during transient power dips.

Use Scenario: DICOM image preprocessing pipeline where FPGA-accelerated filtering writes results to shared memory for CPU-based reconstruction.

IC Role / Device Role / Timing Role: Serves as zero-copy buffer between compute and host domains; left port for FPGA DMA, right port for PCIe BAR-mapped CPU access.

Use Value: 100-pin TQFP footprint fits dense PCB layouts; industrial temp rating ensures reliability in fanless MRI cabinet environments.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-port SRAM applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
CY7C1362BV33-55AC	3.3 V core supply, 55 ns access, 8K × 16 organization; LVCMOS I/O, no built-in semaphores	Requires external arbitration logic and level-shifting for 5 V systems; suited for low-voltage digital signal processors	Select when migrating to 3.3 V domain and external control logic is acceptable
AS7C38099B-55PCN	5 V supply, 55 ns access, 8K × 16; no BUSY arbitration or semaphore logic; simpler control interface	Lacks hardware inter-port coordination - demands software-managed locking or external arbiter ICs	Choose for cost-sensitive designs where deterministic arbitration is not required

Compared with CY7C1362BV33-55AC and AS7C38099B-55PCN, the 7025L55G uniquely integrates BUSY-flag arbitration and 8-semaphore hardware, reducing BOM count and eliminating timing-critical software locks in real-time multi-processor systems.

Availability

7025L55G is available at Aetrix Electronics and suitable for industrial motion controllers, telecom line cards, avionics display processors, and medical imaging subsystems requiring stable component supply across extended product lifecycles.

Supply support for 7025L55G 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 interface solutions, now part of Renesas Electronics since 2019.

The 7025L55G belongs to IDT's legacy dual-port SRAM product line, engineered for deterministic real-time inter-processor communication in industrial automation, aerospace, and communications infrastructure.

FAQ

What is the maximum operating temperature range for the 7025L55G?

The 7025L55G is rated for industrial temperature operation from –40°C to +85°C, as confirmed in the DC Operating Conditions table (Table 5) and validated across all AC timing parameters at this range. This makes it suitable for deployment in harsh environments such as factory-floor PLCs and outdoor telecom cabinets without derating.

Does the 7025L55G support battery backup operation, and what voltage is required?

Yes, the 7025L55G supports battery backup operation with guaranteed data retention at VCC = 2.0 V, as specified in Table 10 (Data Retention Characteristics). The L-version's ultra-low ISB3 standby current (0.2 mA typ) enables multi-year retention on small coin cells, critical for fail-safe systems like emergency shutdown controllers.

How does the BUSY arbitration mechanism work on the 7025L55G?

When configured as Master (M/S = VIH), the 7025L55G asserts BUSY on the opposing port during address/contention events. Arbitration priority is established via tAPS = 5 ns setup time, and valid data appears after tBDD ≤ 30 ns. As Slave (M/S = VIL), BUSY is an input that gates write operations - ensuring deterministic resolution without software intervention.

Can the 7025L55G be used in a 32-bit data bus configuration?

Yes, the 7025L55G supports 32-bit expansion via MASTER/SLAVE cascading: two devices operate in lockstep with one as Master (BUSY output) and the other as Slave (BUSY input), using the M/S pin and shared control lines. This eliminates external logic and maintains full 55 ns speed across the wider bus, as described in the device description and functional block diagram.

What package type is used for the 7025L55G, and are thermal pads supported?

The 7025L55G is supplied in a 100-pin Thin Quad Flatpack (TQFP, package code PNG100) measuring 14 mm × 14 mm × 1.4 mm. The package includes an exposed thermal pad on the bottom surface, which must be soldered to a PCB copper pour for optimal thermal performance - confirmed in the Pin Configuration drawing (Dwg 03) and mechanical notes.

7025L55G Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 84-BPGA

Packaging:: Tray

Product Status:: Active

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:: 55ns

Access Time:: 55 ns

Voltage - Supply:: 4.5V ~ 5.5V

Operating Temperature:: 0°C ~ 70°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 84-PGA (27.94x27.94)

7025L55G FAQ

1.How can I place an order for 7025L55G through Aetrix?

Please submit a Request for Quotation (RFQ) for 7025L55G 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 7025L55G reliable?

The price and inventory of 7025L55G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7025L55G is usually 5 days.

3.What payment methods are accepted for 7025L55G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7025L55G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 7025L55G?

7025L55G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 7025L55G 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 7025L55G?

For technical support, including 7025L55G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7025L55G requirements.

6.How does Aetrix verify that 7025L55G is sourced from the original manufacturer or authorized distributors?

All 7025L55G 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 7025L55G meets industry standards.

7.What is the process for return or replacement of 7025L55G?

All 7025L55G units undergo pre-shipment inspection (PSI). If there is an issue with 7025L55G, 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 7025L55G part is unused and in its original packaging.

Return procedure for 7025L55G:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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