My Inquiry
My Account
Renesas 7133LA35PFI
- Part No.:
- 7133LA35PFI
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
7133LA35PFI.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,988
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
7133LA35PFI from IDT is a high-speed 2K × 16 dual-port static RAM with master arbitration logic, 35 ns max access time, 1.0 mA full-standby current, and industrial temperature range (–40°C to +85°C), used in real-time embedded systems requiring concurrent CPU and peripheral memory access.
For engineers reviewing the 7133LA35PFI datasheet, 7133LA35PFI pinout, 7133LA35PFI application, or 7133LA35PFI equivalent, this page delivers verified timing specs, byte-level write control, BUSY arbitration behavior, battery backup capability at 2V, and exact 68-pin PLCC package mapping - all confirmed for the 7133LA35PFI variant.
Technical Context
The 7133LA35PFI implements fully asynchronous dual-port operation with independent left/right address, control, and I/O buses. Its on-chip arbitration logic resolves port contention via open-drain BUSYL/BUSYR outputs (MASTER mode), enabling deterministic priority resolution without external logic.
It supports separate upper/lower byte write enables (R/WLUB/R/WLLB and R/WRUB/R/WRLB) per port, TTL-compatible 5V ±10% supply, and battery backup data retention at VCC = 2V - a feature exclusive to LA-grade variants and validated for industrial temperature operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 16 bits (32 Kbit), organized as 2048 words × 16-bit wide |
| Access Time | 35 ns max - guarantees deterministic read latency for real-time control loops |
| Supply Voltage | 5.0 V ±10% - compatible with legacy 5V TTL bus systems |
| Standby Current | 1.0 mA max (ISB3, CMOS-level CE) - enables ultra-low-power hold mode during system sleep |
| Data Retention | 2.0 V min VCC - retains data on backup battery without active regulation |
| Operating Temp | –40°C to +85°C - qualified for industrial environments including motor drives and PLCs |
| Package | 68-pin PLCC (PLG68) - surface-mountable, RoHS-compliant, 0.95″ × 0.95″ footprint |
Pinout & Package
68-pin Plastic Leaded Chip Carrier (PLCC, package code PLG68), top-view pinout with dual I/O banks, dedicated BUSY flag pins, and dual VCC/GND pairs for noise isolation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A10L | Left port address inputs | 11-bit address bus for 2K-word left-side access |
| A0R–A10R | Right port address inputs | Independent 11-bit address bus for concurrent right-side access |
| I/O0L–I/O15L | Left port bidirectional data | 16-bit data path; high-impedance when OEL or CEL inactive |
| I/O0R–I/O15R | Right port bidirectional data | 16-bit data path; electrically isolated from left port I/O |
| CEL / CER | Chip enable (active low) | Port-selective power-down control; disables internal circuitry when high |
| R/WLUB / R/WLLB | Left upper/lower byte write enable | Enables byte-granular writes to left port I/O0–7 or I/O8–15 |
| R/WRUB / R/WRLB | Right upper/lower byte write enable | Enables byte-granular writes to right port I/O0–7 or I/O8–15 |
| OEL / OER | Output enable (active low) | Controls output drivers independently of CE; allows read-only standby |
| BUSYL / BUSYR | Busy flag (open-drain) | Indicates port contention; requires external pull-up; MASTER output only |
| VCC(1), VCC(2) | Power supply | Two dedicated 5V pins - must both be connected for reliable operation |
| GND(1), GND(2) | Ground | Two dedicated ground pins - must both be connected for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| On-chip arbitration logic | Resolves simultaneous left/right port accesses to same address without external logic or software intervention |
| Separate byte write controls | Enables partial-word updates (e.g., 8-bit register writes) without read-modify-write cycles |
| Open-drain BUSY outputs | Allows wired-OR of multiple BUSY signals for system-level interrupt generation |
| 2V data retention | Maintains memory contents during main power loss using coin-cell backup - no external regulator needed |
| Industrial temperature rating | Validated operation from –40°C to +85°C - suitable for factory automation and outdoor telecom equipment |
Applications
| Motor Control System | Digital Signal Processor Interface |
|---|---|
Use Scenario: Real-time servo loop where FPGA reads position feedback while DSP writes updated PWM parameters. IC Role / Device Role / Timing Role: Dual-port RAM acts as synchronized shared memory buffer between FPGA (left port) and DSP (right port), eliminating handshake overhead. Use Value: 35 ns access ensures sub-µs data exchange - critical for 20 kHz motor update rates without jitter. | Use Scenario: Audio codec interfacing with TI C6000 DSP, requiring low-latency DMA transfers and real-time parameter updates. IC Role / Device Role / Timing Role: Provides non-blocking access for DSP core (right port) and audio DMA controller (left port) to shared coefficient tables. Use Value: Byte-selectable writes allow DSP to update individual filter coefficients without disturbing adjacent memory locations. |
| Industrial PLC Backplane | Redundant Communication Controller |
Use Scenario: Dual-CPU hot-standby architecture where primary and backup CPUs share status registers and I/O image. IC Role / Device Role / Timing Role: Acts as fault-tolerant shared memory with BUSY arbitration preventing conflicting writes during failover transitions. Use Value: Open-drain BUSY outputs enable hardware-level coordination - eliminates software race conditions during switchover. | Use Scenario: Dual CAN controllers sharing message buffers and status flags in railway signaling equipment. IC Role / Device Role / Timing Role: Serves as atomic message queue memory where one controller writes packets while the other reads and transmits. Use Value: 2V data retention preserves pending messages during brief power interruptions - meeting EN 5012x safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port RAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C133-35PC | 35 ns access, 2K × 16, but no on-chip arbitration logic; BUSY must be implemented externally | Requires additional logic for contention resolution; not drop-in for MASTER/SLAVE expansion | Select only if arbitration is handled in FPGA or if single-port operation suffices |
| IDT7143LA35PFI | Identical timing and retention, but SLAVE-only: BUSY pins are inputs only; no arbitration logic | Must be paired with 7133LA35PFI for width expansion; cannot operate standalone as MASTER | Use only as companion SLAVE in 32-bit+ bus systems; not a functional replacement |
Compared with CY7C133-35PC and IDT7143LA35PFI, the 7133LA35PFI uniquely integrates arbitration logic and MASTER BUSY output - enabling simpler, faster, and more reliable dual-CPU memory sharing without external components.
Availability
7133LA35PFI is available at Aetrix Electronics and suitable for motor control systems, industrial PLCs, DSP interfaces, and redundant communication controllers requiring stable component supply across extended product lifecycles.
Supply support for 7133LA35PFI 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, and interface solutions for high-performance computing and industrial applications.
The IDT7133 family was designed specifically for real-time embedded systems requiring deterministic, contention-free dual-processor memory access - with integrated arbitration, battery backup, and industrial temperature reliability.
FAQ
What is the maximum access time guaranteed for the 7133LA35PFI?
The 7133LA35PFI guarantees a maximum access time of 35 ns across its full industrial temperature range (–40°C to +85°C) and supply voltage (4.5 V to 5.5 V). This value is specified for tAA (address access time), tACE (chip enable access time), and tAOE (output enable access time) under worst-case conditions, ensuring deterministic timing for hard real-time systems.
Does the 7133LA35PFI support battery backup operation, and what voltage is required?
Yes, the 7133LA35PFI supports battery backup operation with guaranteed data retention at VCC = 2.0 V minimum. This is a key differentiator of the LA (low-power) variant, enabling memory state preservation during main power loss - commonly used with 3V lithium coin cells regulated down to 2V or directly connected with appropriate current limiting.
How does the BUSY arbitration logic work in the 7133LA35PFI?
The 7133LA35PFI implements hardware arbitration via open-drain BUSYL and BUSYR outputs. When both ports attempt access to the same memory location, the device asserts BUSY on the losing port to stall its write cycle. The winning port proceeds unimpeded. This logic is intrinsic to the 7133LA35PFI and requires no external components - unlike SLAVE-only variants such as IDT7143LA35PFI.
What package type is used for the 7133LA35PFI, and are there any layout requirements?
7133LA35PFI uses a 68-pin Plastic Leaded Chip Carrier (PLCC, package code PLG68). Layout requires connection of both VCC pins (pins 17 and 35) to the 5V supply and both GND pins (pins 26 and 44) to ground. Failure to connect both power/ground pairs may cause intermittent operation or increased noise susceptibility.
Can the 7133LA35PFI be used as a standalone dual-port RAM, or does it require a companion device?
The 7133LA35PFI functions fully as a standalone 16-bit dual-port RAM. It does not require a companion device. However, when expanding to 32-bit or wider data buses, it serves as the MASTER unit paired with IDT7143LA35PFI SLAVE devices - leveraging its built-in arbitration logic to prevent "busy lock-out" in multi-chip configurations.
7133LA35PFI 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:
- 32Kbit
- Memory Organization:
- 2K 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:
- 100-TQFP (14x14)
7133LA35PFI FAQ
1.How can I place an order for 7133LA35PFI through Aetrix?
Please submit a Request for Quotation (RFQ) for 7133LA35PFI 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 7133LA35PFI reliable?
The price and inventory of 7133LA35PFI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7133LA35PFI is usually 5 days.
3.What payment methods are accepted for 7133LA35PFI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7133LA35PFI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7133LA35PFI?
7133LA35PFI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7133LA35PFI 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 7133LA35PFI?
For technical support, including 7133LA35PFI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7133LA35PFI requirements.
6.How does Aetrix verify that 7133LA35PFI is sourced from the original manufacturer or authorized distributors?
All 7133LA35PFI 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 7133LA35PFI meets industry standards.
7.What is the process for return or replacement of 7133LA35PFI?
All 7133LA35PFI units undergo pre-shipment inspection (PSI). If there is an issue with 7133LA35PFI, 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 7133LA35PFI part is unused and in its original packaging.
Return procedure for 7133LA35PFI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7133LA35PFI 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…
