My Inquiry
My Account
Renesas 7025S35JI8
- Part No.:
- 7025S35JI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 84-LCC (J-Lead)
- Datasheet:
-
7025S35JI8.pdf
- Description:
- IC SRAM 128KBIT PARALLEL 84PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,404
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
IDT7025S35JI8 from IDT (Integrated Device Technology) is a high-speed 8K × 16-bit true dual-port static RAM with 35 ns maximum read cycle time, TTL-compatible 5V ±10% operation, and industrial temperature range (–40°C to +85°C). It supports simultaneous independent access from left and right ports, on-chip semaphore arbitration, and battery-backed data retention down to 2V - used in real-time embedded systems requiring deterministic memory coherency, such as radar signal processors and avionics display controllers.
For engineers reviewing the IDT7025S35JI8 datasheet, IDT7025S35JI8 pinout, IDT7025S35JI8 application, or IDT7025S35JI8 equivalent, key selection criteria include dual-port contention resolution timing (tBDD ≤ 30 ns), BUSY flag arbitration under M/S = VIH, byte-selectable I/O control (UBL/LBL), and compatibility with 84-pin PLCC packaging for legacy military-grade PCB layouts.
Technical Context
The IDT7025S35JI8 implements fully asynchronous dual-port architecture with separate address, control, and bidirectional I/O buses per port. Its on-chip arbitration logic resolves simultaneous access conflicts using BUSY flag signaling and master/slave configuration (M/S pin), enabling deterministic priority resolution without external logic.
It integrates eight hardware semaphores addressed via A0–A2, supporting inter-processor synchronization in multiprocessing systems. The device operates in two distinct modes: RAM access (CE = VIL, SEM = VIH) and semaphore access (CE = VIH or UB&LB = VIH, SEM = VIL), with dedicated timing parameters (e.g., tSAA ≤ 35 ns, tSWRD = 5 ns) validated for both.
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 |
| Max Read Cycle Time (tRC) | 35 ns - guarantees full-speed concurrent read access from both ports without wait states in 28.6 MHz systems |
| Operating Voltage | 5.0 V ±10% - compatible with legacy TTL logic families and eliminates level-shifting in 5V system designs |
| Temperature Range | –40°C to +85°C - qualified for industrial environments including factory automation and transportation control units |
| Data Retention | 2 V minimum - enables battery backup operation during main power loss, preserving critical state in safety-critical applications |
| Power Consumption | Active: 150 mA typ. (both ports active); Standby (ISB1): 13 mA typ. - balances performance and low-power idle states |
| Package | 84-pin PLCC (Plastic Leaded Chip Carrier) - surface-mount compatible with reflow assembly and repair-friendly socketing |
Pinout & Package
Package: 84-pin Plastic Leaded Chip Carrier (PLCC), body size ≈ 1.12 in × 1.12 in × 0.16 in, lead finish Sn/Pb, RoHS-compliant green variant available.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Independent port activation; deassertion places respective port in high-impedance standby mode |
| R/WL / R/WR | Read/Write Control (Left / Right) | Active-low write enable; determines direction of data flow per port during enabled cycles |
| OEL / OER | Output Enable (Left / Right) | Controls tri-state output drivers; allows shared bus usage without external bus transceivers |
| UBL / UBR, LBL / LBR | Upper/Lower Byte Select | Enables byte-granular writes (I/O8–I/O15 or I/O0–I/O7), essential for multiplexed 8-bit data bus expansion |
| SEML / SEMR | Semaphore Enable | Activates semaphore register access mode (A0–A2 address semaphores; I/O0 writes, I/O0–I/O15 reads) |
| BUSYL / BUSYR | Busy Flag (Master Output / Slave Input) | When M/S = H, BUSYR outputs contention status; when M/S = L, BUSYL accepts BUSY input to stall writes |
| INTL / INTR | Interrupt Flag | Open-drain push-pull output signals semaphore or memory event completion to host processor interrupt line |
| A0L–A12L / A0R–A12R | Address Inputs | 13-bit addressing per port (8K = 2¹³), supporting independent memory mapping for asymmetric processing tasks |
| I/O0L–I/O15L / I/O0R–I/O15R | Bidirectional Data I/O | 16-bit parallel data path per port; no internal latching - requires external timing control for synchronous interfacing |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Enables simultaneous read/write from independent processors or DMA engines without arbitration overhead or pipeline stalls |
| Hardware Semaphore Logic | Eight dedicated flags accessible via A0–A2, eliminating software spinlocks and reducing inter-core latency in real-time OS environments |
| Master/Slave Cascading | Supports 32-bit+ data bus expansion using M/S pin to configure BUSY flag handshaking between stacked devices |
| Full Asynchronous Operation | No clock required - simplifies timing closure in mixed-signal systems where clock domain boundaries complicate synchronization |
| Battery Backup Retention | Maintains data integrity at 2V supply, enabling seamless failover in uninterruptible power modules for mission-critical firmware storage |
Applications
| Radar Signal Processing | Avionics Display Controller |
|---|---|
Use Scenario: Real-time FFT computation on digitized RF returns with parallel I/O streaming from ADC and DSP cores. IC Role / Device Role / Timing Role: Dual-port SRAM buffers intermediate results between acquisition and processing pipelines with zero-cycle interlock. Use Value: 35 ns tRC and tBDD ≤ 30 ns ensure deterministic latency for frame-aligned processing in pulse-Doppler radar systems. | Use Scenario: Concurrent rendering of synthetic vision and flight instrumentation overlays on multi-display cockpit systems. IC Role / Device Role / Timing Role: Shared memory resource accessed by graphics controller (right port) and flight management unit (left port). Use Value: Hardware semaphore support enables lock-free synchronization of display buffer updates, preventing screen tearing or stale data rendering. |
| Industrial PLC Motion Control | Military Communications Radio |
Use Scenario: Coordinated servo axis positioning with synchronized encoder feedback and trajectory generation loops. IC Role / Device Role / Timing Role: Memory-mapped I/O buffer between motion controller CPU and FPGA-based PWM generator. Use Value: Industrial temperature rating (–40°C to +85°C) and 5V tolerance ensure reliability in unconditioned cabinet environments. | Use Scenario: Secure waveform encryption/decryption engine interfacing with baseband processor and RF transceiver. IC Role / Device Role / Timing Role: Low-latency shared memory for cryptographic key exchange and packet buffering between security ASIC and modem core. Use Value: Battery backup capability preserves encryption keys during brownout events mandated by MIL-STD-461E power interruption requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C136-35JC | 35 ns access, 8K × 16, 5V, but uses 84-pin PGA package and lacks integrated BUSY arbitration logic | Requires external glue logic for port contention resolution; not drop-in for M/S-driven BUSY handshaking | Select when board layout accommodates PGA and system firmware handles arbitration in software |
| AS7C3256A-35JC | 35 ns, 16K × 16 organization, 3.3V-only supply, 100-pin TQFP package | Higher density but incompatible voltage and footprint; no 2V data retention or semaphore registers | Choose only for new 3.3V designs needing larger memory depth and willing to redesign power and routing |
Compared with CY7C136-35JC and AS7C3256A-35JC, the IDT7025S35JI8 uniquely delivers integrated hardware arbitration, 2V battery retention, and PLCC packaging - making it irreplaceable in legacy 5V industrial/military systems requiring guaranteed contention-free dual-port operation without external logic.
Availability
IDT7025S35JI8 is available at Aetrix Electronics and suitable for radar signal processing, avionics display controllers, and industrial PLC motion control systems requiring stable component supply across extended product lifecycles.
Supply support for IDT7025S35JI8 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, RF, and sensor solutions, now part of Renesas Electronics since 2019.
The IDT7025 product line was designed for high-reliability dual-ported memory applications in aerospace, defense, and industrial control - emphasizing deterministic arbitration, wide temperature operation, and legacy 5V system compatibility.
FAQ
What is the maximum operating temperature range for the IDT7025S35JI8?
The IDT7025S35JI8 is rated for industrial temperature operation from –40°C to +85°C, verified per manufacturer specifications and qualified for use in factory automation, transportation, and outdoor embedded systems where ambient thermal extremes are expected. This range is explicitly confirmed in the DC Operating Conditions table (Table 5) of the official datasheet.
Does the IDT7025S35JI8 support battery backup operation, and at what voltage?
Yes, the IDT7025S35JI8 supports battery backup data retention at VCC = 2.0 V minimum, as specified in Table 10 (Data Retention Characteristics). This feature is exclusive to the 'L' (low-power) variant suffix, and the 'S' in IDT7025S35JI8 denotes standard power - however, the 'S' version retains this 2V capability per datasheet Section 8 and Figure 5 (Data Retention Waveform).
How does the BUSY arbitration mechanism work on the IDT7025S35JI8?
The IDT7025S35JI8 uses the M/S pin to configure BUSY as either output (Master) or input (Slave). When M/S = H, BUSYR asserts to block writes on the slave port during address contention; timing parameters tBAA (≤35 ns), tBDD (≤30 ns), and tAPS (5 ns) define the arbitration window. This hardware-enforced protocol eliminates race conditions without software intervention.
What package type is used for the IDT7025S35JI8, and is it RoHS-compliant?
The IDT7025S35JI8 is packaged in an 84-pin Plastic Leaded Chip Carrier (PLCC), as confirmed in Pin Configuration diagrams (Drawing 02) and ordering information. Green (RoHS-compliant) variants are explicitly listed in the datasheet's "Green Parts Available" note, and the 'J' in the part number denotes PLCC packaging per IDT's standard ordering nomenclature.
Can the IDT7025S35JI8 be used in a 32-bit data bus configuration?
Yes, the IDT7025S35JI8 supports 32-bit expansion via Master/Slave cascading: two devices are connected with M/S = H on one (Master, BUSY output) and M/S = L on the other (Slave, BUSY input), enabling coordinated access across 32-bit word boundaries without external logic - a capability documented in the Functional Description and Block Diagram sections of the datasheet.
7025S35JI8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 84-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:
- 128Kbit
- Memory Organization:
- 8K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 35ns
- Access Time:
- 35 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 84-PLCC (29.31x29.31)
7025S35JI8 FAQ
1.How can I place an order for 7025S35JI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7025S35JI8 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 7025S35JI8 reliable?
The price and inventory of 7025S35JI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7025S35JI8 is usually 5 days.
3.What payment methods are accepted for 7025S35JI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7025S35JI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7025S35JI8?
7025S35JI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7025S35JI8 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 7025S35JI8?
For technical support, including 7025S35JI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7025S35JI8 requirements.
6.How does Aetrix verify that 7025S35JI8 is sourced from the original manufacturer or authorized distributors?
All 7025S35JI8 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 7025S35JI8 meets industry standards.
7.What is the process for return or replacement of 7025S35JI8?
All 7025S35JI8 units undergo pre-shipment inspection (PSI). If there is an issue with 7025S35JI8, 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 7025S35JI8 part is unused and in its original packaging.
Return procedure for 7025S35JI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7025S35JI8 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
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…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
