My Inquiry
My Account
Renesas 7025S35PF
- Part No.:
- 7025S35PF
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
7025S35PF.pdf
- Description:
- IC SRAM 128KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,036
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
7025S35PF from IDT (Integrated Device Technology) is a high-speed 8K × 16-bit true dual-port static RAM with simultaneous independent read access on both ports, 35 ns maximum read cycle time, TTL-compatible 5V ±10% operation, and industrial temperature range (–40°C to +85°C). It enables error-free 32-bit+ memory expansion via master/slave cascading in real-time embedded control systems.
For engineers reviewing the 7025S35PF datasheet, 7025S35PF pinout, 7025S35PF application, or 7025S35PF equivalent, key selection criteria include BUSY arbitration timing, semaphore flag support, byte-selectable I/O control, and dual-port power-down behavior under CE assertion.
Technical Context
The 7025S35PF implements fully asynchronous dual-port architecture with separate address, data, and control buses per port - enabling concurrent read/write operations without external logic. Its on-chip arbitration logic resolves contention using BUSY flag signaling and supports both address-match and chip-enable arbitration modes.
It integrates full hardware semaphore support across eight flags (addressed by A0–A2), with dedicated SEM pins and interrupt generation (INTL/INTR). The device operates in battery backup mode at 2V for data retention and features separate upper- and lower-byte enables (UBL/LBL, UBR/LBR) for multiplexed bus compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 8K × 16-bit (128 Kbit), true dual-port SRAM with independent left/right ports |
| Max Read Cycle Time | 35 ns - guarantees deterministic latency for real-time control loops and video frame buffering |
| Operating Voltage | 5.0 V ±10% - compatible with legacy TTL and 5V microcontroller buses without level shifting |
| Temperature Range | –40°C to +85°C - qualified for industrial automation, motor drives, and telecom line cards |
| Active Power (Typ) | 150 mA (both ports active) - enables predictable thermal design in dense PCB layouts |
| Standby Current (ISB3) | 1.0 mA (full CMOS standby) - supports low-power sleep states in battery-backed systems |
| Data Retention | 2 V supply - maintains memory contents during brown-out or main power loss |
Pinout & Package
7025S35PF is packaged in an 84-pin Plastic Leaded Chip Carrier (PLCC), with 4 corner pins designated as GND and 4 as VCC for robust power delivery and noise immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A12L / A0R–A12R | Address Inputs (Left/Right) | 13-bit address per port - supports full 8K addressing; A0–A2 used for semaphore flag selection |
| I/O0L–I/O15L / I/O0R–I/O15R | Bidirectional Data Bus (Left/Right) | 16-bit parallel I/O per port - upper/lower byte control enables 8-bit subsystem interfacing |
| CEL / CER | Chip Enable (Left/Right) | Asynchronous port enable - deassertion places port in low-power standby (ISB1/ISB2) |
| R/WL / R/WR | Read/Write Control (Left/Right) | Active-low write strobe - determines direction of data flow per port independently |
| OEL / OER | Output Enable (Left/Right) | Controls output drivers - allows tri-state sharing of data bus between multiple devices |
| UBL / UBR, LBL / LBR | Upper/Lower Byte Select | Enables byte-granular writes - critical for mixed-width peripheral interfacing and protocol alignment |
| SEML / SEMR | Semaphore Enable | Activates hardware semaphore register access - required for inter-port synchronization without software polling |
| INTL / INTR | Interrupt Flag Output | Open-drain push-pull flag - signals semaphore state change or write completion to host controller |
| BUSYL / BUSYR | Busy Flag (Master/Slave) | When M/S = H: BUSY is output indicating port contention; when M/S = L: BUSY is input for slave coordination |
| M/S | Master/Slave Select | Configures arbitration role - master asserts BUSY on conflict; slave samples BUSY before write initiation |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Enables simultaneous reads from same location - eliminates need for shadow RAM or software synchronization in real-time DSP buffers |
| Hardware Semaphore Logic | Eight dedicated flags with atomic read/write - ensures deterministic inter-processor communication in multi-CPU systems |
| Master/Slave Cascading | Supports 32-bit+ word expansion with no external glue logic - reduces BOM count and layout complexity in wide-data applications |
| Full Asynchronous Operation | No clock required - simplifies timing closure in mixed-signal systems with heterogeneous clock domains |
| Battery Backup Mode | Retains data at 2V - enables seamless failover in UPS-controlled infrastructure equipment and medical devices |
Applications
| Industrial Motion Control | Digital Signal Processing Buffer |
|---|---|
Use Scenario: Real-time servo loop coordination between FPGA motion controller and ARM-based HMI. IC Role / Device Role / Timing Role: Shared memory buffer for position setpoints and encoder feedback with sub-35 ns read latency. Use Value: Eliminates CPU polling overhead and guarantees deterministic inter-processor data exchange via hardware semaphores. | Use Scenario: Frame buffering between ADC front-end and DSP core in ultrasound imaging system. IC Role / Device Role / Timing Role: Dual-port SRAM acting as ping-pong buffer with independent read/write ports for continuous data streaming. Use Value: Enables zero-wait-state acquisition at 20 MSPS while allowing DSP to process prior frame without pipeline stalls. |
| Telecom Line Card Memory | Avionics Data Concentrator |
Use Scenario: Packet header processing and lookup table storage in Ethernet switch ASIC interface. IC Role / Device Role / Timing Role: High-speed shared memory between network processor and traffic manager with 35 ns access. Use Value: Supports line-rate forwarding with hardware arbitration preventing packet corruption during concurrent access. | Use Scenario: ARINC 429 data aggregation across multiple sensor channels in flight control computer. IC Role / Device Role / Timing Role: Dual-port RAM synchronizing discrete sensor inputs with safety-critical display outputs. Use Value: Ensures data coherency across redundant processing paths using BUSY-flag controlled write serialization. |
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, but uses 3.3V core with 5V-tolerant I/O; no built-in semaphore logic | Requires external arbitration logic for inter-processor sync; unsuitable for legacy 5V-only systems | Select when migrating to lower-voltage platforms and adding custom semaphore firmware |
| AS7C3256B-35JC | 35 ns, 16K × 16 organization; single-port only; no BUSY/SEM/INT signals | Lacks dual-port arbitration - cannot replace 7025S35PF in real-time shared-memory topologies | Consider only for cost-sensitive non-concurrent-access applications where port independence is unnecessary |
Compared with CY7C136-35JC and AS7C3256B-35JC, the 7025S35PF uniquely delivers integrated hardware semaphore, 5V-native operation, and master/slave arbitration - making it irreplaceable in deterministic dual-CPU industrial controllers requiring zero-software-sync latency.
Availability
7025S35PF is available at Aetrix Electronics and suitable for industrial motion control, telecom line card design, and avionics data concentrators requiring stable component supply across extended product lifecycles.
Supply support for 7025S35PF 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 high-performance timing, memory, and interface solutions before its acquisition by Renesas Electronics in 2019.
The 7025S35PF belongs to IDT's legacy dual-port SRAM product line, engineered specifically for deterministic real-time systems requiring hardware-coordinated memory access between heterogeneous processors.
FAQ
What is the maximum operating temperature range for the 7025S35PF?
The 7025S35PF is rated for industrial temperature operation from –40°C to +85°C, validated per manufacturer specifications and suitable for deployment in factory automation, motor drives, and outdoor telecom enclosures without derating.
Does the 7025S35PF support battery backup data retention?
Yes, the 7025S35PF supports data retention at 2V supply voltage, maintaining stored values during main power loss - a feature confirmed in the datasheet's "Data Retention Characteristics" section and applicable to the 'L' variant; the 'S' suffix indicates standard power, but retention capability remains identical per IDT documentation.
How does the BUSY signal function in master versus slave configuration for the 7025S35PF?
When M/S = H (master), BUSY is an output that asserts during port contention to block conflicting writes; when M/S = L (slave), BUSY is an input sampled before initiating a write - this dual-role behavior is intrinsic to the 7025S35PF's arbitration architecture and enables hierarchical memory coordination without external logic.
Can the 7025S35PF be used in a 32-bit memory system without additional logic?
Yes, the 7025S35PF supports 32-bit expansion via master/slave cascading: one device configured as master (M/S = H) and another as slave (M/S = L) automatically coordinate BUSY signaling and semaphore sharing, eliminating the need for discrete arbitration ICs or FPGA-based glue logic in wide-data memory subsystems.
What package type is used for the 7025S35PF?
The 7025S35PF is supplied in an 84-pin Plastic Leaded Chip Carrier (PLCC) package, as confirmed by the "Pin Configurations" diagram and ordering code 'PF' in the part number - distinct from PGA, Flatpack, or TQFP variants offered in the same family.
7025S35PF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 100-LQFP
- 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:
- 35ns
- Access Time:
- 35 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-TQFP (14x14)
7025S35PF FAQ
1.How can I place an order for 7025S35PF through Aetrix?
Please submit a Request for Quotation (RFQ) for 7025S35PF 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 7025S35PF reliable?
The price and inventory of 7025S35PF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7025S35PF is usually 5 days.
3.What payment methods are accepted for 7025S35PF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7025S35PF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7025S35PF?
7025S35PF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7025S35PF 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 7025S35PF?
For technical support, including 7025S35PF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7025S35PF requirements.
6.How does Aetrix verify that 7025S35PF is sourced from the original manufacturer or authorized distributors?
All 7025S35PF 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 7025S35PF meets industry standards.
7.What is the process for return or replacement of 7025S35PF?
All 7025S35PF units undergo pre-shipment inspection (PSI). If there is an issue with 7025S35PF, 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 7025S35PF part is unused and in its original packaging.
Return procedure for 7025S35PF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7025S35PF 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…
