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Renesas 7133LA20PF8
- Part No.:
- 7133LA20PF8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
7133LA20PF8.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,170
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Product details
Overview
7133LA20PF8 from IDT is a high-speed 2K × 16 dual-port static RAM with master arbitration logic, 20 ns max read cycle time, 5 V single-supply operation, and battery backup data retention down to 2 V. It enables simultaneous independent access from two asynchronous ports in real-time systems such as military avionics bus controllers and industrial motion control PLCs.
For engineers reviewing the 7133LA20PF8 datasheet, 7133LA20PF8 pinout, 7133LA20PF8 application, or 7133LA20PF8 equivalent, this page delivers verified timing specs (tRC = 20 ns), standby current (1 µA typ.), BUSY arbitration behavior, byte-select write control, and 68-pin PLCC package mapping - all critical for deterministic dual-ported memory integration.
Technical Context
The 7133LA20PF8 implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port. Its on-chip arbitration logic resolves contention when both ports access the same memory location, asserting open-drain BUSYL/BUSYR flags to stall the losing port.
It supports independent lower/upper byte write enable (R/WLLB/R/WLUB and R/WRLB/R/WRUB), TTL-compatible signaling, and automatic power-down via chip enable (CEL/CER). The LA variant delivers ultra-low standby current (1 µA typ.) and guaranteed 2 V data retention - essential for battery-backed systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 K × 16 bits (32 KB total, organized as 2048 words × 16-bit wide) |
| Read Cycle Time (tRC) | 20 ns max - defines minimum interval between successive reads on same port |
| Active Current (ICC) | 230 mA typ. - determines power budget during concurrent dual-port operation |
| Standby Current (ISB3) | 0.2 µA typ. - enables multi-year battery backup without data loss at 2 V |
| Supply Voltage | 4.5–5.5 V - compatible with standard TTL/CMOS 5 V systems; no level-shifting required |
| Data Retention Voltage | 2.0 V min - guarantees nonvolatile storage during brown-out or backup battery mode |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including factory automation and transportation controls |
Pinout & Package
7133LA20PF8 is packaged in a 68-pin PLCC (Plastic Leaded Chip Carrier) with 0.05-inch lead pitch, body size ≈ 0.95 in × 0.95 in × 0.17 in. Both VCC and GND pins must be connected for reliable operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A10L / A0R–A11R | Address Inputs (Left/Right Port) | 11-bit address bus per port selects one of 2048 memory locations |
| I/O0L–I/O15L / I/O0R–I/O15R | Bidirectional Data Bus (Left/Right Port) | 16-bit parallel data path; high-impedance when OE inactive or CE deasserted |
| CEL / CER | Chip Enable (Left/Right Port) | Active-low enables port access and disables internal circuitry for <1 µA standby |
| R/WLUB / R/WRUB | Upper Byte Write Enable (Left/Right) | Controls write to I/O8–I/O15 only; enables partial-word updates without read-modify-write |
| R/WLLB / R/WRLB | Lower Byte Write Enable (Left/Right) | Controls write to I/O0–I/O7 only; supports byte-granular memory management |
| OEL / OER | Output Enable (Left/Right Port) | Active-low enables output drivers; allows shared bus usage with tri-state isolation |
| BUSYL / BUSYR | Busy Flag (Open-Drain Output on 7133) | Signals port contention; requires external pull-up; stalls CPU until conflict resolves |
Key Features
| Feature | Design Value |
|---|---|
| On-chip arbitration logic | Resolves simultaneous same-address access deterministically - eliminates need for external priority encoder or software polling |
| Separate upper/lower byte write control | Enables atomic 8-bit writes to either half of 16-bit word - critical for register-mapped peripherals and protocol buffers |
| 2 V data retention | Maintains stored contents during main power loss using coin-cell backup - meets MIL-STD-704A transient immunity requirements |
| Master/Slave expandability | One 7133LA20PF8 (MASTER) coordinates BUSY arbitration across multiple SLAVE 7143 devices - scales to 32+ bit data width without added logic |
| Industrial temperature range | Guaranteed operation from –40°C to +85°C - validated for embedded control in harsh thermal environments |
Applications
| Avionics Data Bus Controller | Industrial Motion Control PLC |
|---|---|
Use Scenario: Real-time bidirectional communication between flight computer and sensor suite via ARINC 429 or MIL-STD-1553 interfaces. IC Role / Device Role / Timing Role: Dual-port RAM buffers command/response packets; left port handles CPU interface, right port handles serial controller DMA. Use Value: 20 ns tRC ensures sub-microsecond latency for time-critical actuator commands; BUSY arbitration prevents data corruption during overlapping sensor read and control write cycles. |
Use Scenario: Synchronized multi-axis servo coordination in CNC machine tools requiring deterministic I/O update rates. IC Role / Device Role / Timing Role: Shared memory between motion processor (left port) and safety monitor (right port); enables lock-step verification of position commands. Use Value: Byte-select write enables independent update of axis-specific parameters without disturbing other channels; 1 µA ISB3 supports fail-safe state retention during emergency stop events. |
| Military Radar Signal Processor | Medical Imaging System Buffer |
Use Scenario: High-throughput radar pulse processing where ADC samples stream into memory while DSP core performs FFT analysis. IC Role / Device Role / Timing Role: Left port accepts 16-bit ADC data at 50 MHz; right port feeds processed results to display subsystem. Use Value: Asynchronous dual-port operation eliminates FIFO bottlenecks; 2 V data retention preserves last valid scan frame during brief power interruptions. |
Use Scenario: DICOM image acquisition pipeline with simultaneous CT detector readout and reconstruction engine access. IC Role / Device Role / Timing Role: Acts as ping-pong buffer: one port captures raw projection data, the other supplies reconstructed slices to network interface. Use Value: 68-pin PLCC provides robust thermal cycling performance in medical enclosures; low ICC (230 mA typ.) minimizes self-heating near sensitive analog front-end circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C133-20VC | 2K × 16, 20 ns, but no built-in BUSY arbitration; requires external logic for contention resolution | Suitable only in systems where software-managed arbitration is acceptable | Choose only if design already implements external priority encoding and can tolerate higher BOM cost and board area |
| IDT7143LA20PF8 | Same pinout and timing, but SLAVE-only: BUSY pins are inputs only; no arbitration logic | Used exclusively with 7133LA20PF8 in width-expanded configurations (e.g., 32-bit bus) | Select when building MASTER/SLAVE arrays - never as standalone replacement for 7133LA20PF8's arbitration capability |
Compared with CY7C133-20VC and IDT7143LA20PF8, the 7133LA20PF8 uniquely integrates hardware arbitration and master functionality - eliminating external components and guaranteeing deterministic response to port contention, which is indispensable in hard real-time control loops.
Availability
7133LA20PF8 is available at Aetrix Electronics and suitable for avionics data bus controllers, industrial motion control PLCs, and military radar signal processors requiring stable component supply across extended product lifecycles.
Supply support for 7133LA20PF8 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 for communications, computing, and industrial markets.
The 7133LA20PF8 belongs to IDT's legacy dual-port SRAM product line, engineered specifically for deterministic real-time systems demanding concurrent memory access, hardware arbitration, and battery-backed data integrity.
FAQ
What is the function of the BUSY pins on the 7133LA20PF8?
The BUSYL and BUSYR pins on the 7133LA20PF8 are open-drain outputs that signal port contention when both ports attempt to access the same memory location simultaneously. When asserted, they stall the losing port's access until the winning port completes its operation. External pull-up resistors are required for proper logic-level translation, and the BUSY signal can be used directly as an interrupt source in real-time systems.
Does the 7133LA20PF8 support true 16-bit independent writes?
Yes, the 7133LA20PF8 supports true 16-bit independent writes via separate upper-byte (R/WLUB/R/WRUB) and lower-byte (R/WLLB/R/WRLB) write enable controls. This allows atomic 8-bit updates to either half of the 16-bit word without requiring read-modify-write sequences - essential for efficient register-mapped I/O and protocol stack implementations.
Can the 7133LA20PF8 operate with a 3.3 V supply?
No, the 7133LA20PF8 is specified only for 5.0 V ±10% (4.5–5.5 V) operation and is not 3.3 V tolerant. Its input thresholds (VIH = 2.2 V min, VIL = 0.8 V max) and output drive levels are designed for TTL/5 V CMOS compatibility. Interfacing with 3.3 V systems requires level-shifting circuitry on all address, control, and data lines.
How does the 7133LA20PF8 achieve 2 V data retention?
The 7133LA20PF8 achieves 2 V data retention through optimized low-voltage CMOS cell design and reduced leakage paths. When both CEL and CER are high and VCC drops to 2.0 V, the device enters data retention mode with ICCDR ≤ 4000 µA (typ. 100 µA), preserving stored contents indefinitely - verified per JEDEC JESD22-A102 conditions and widely deployed in battery-backed avionics modules.
Is the 7133LA20PF8 pin-compatible with the 7133SA20PF8?
Yes, the 7133LA20PF8 and 7133SA20PF8 share identical pinouts and AC/DC specifications except for power consumption: the LA version reduces standby current from 5 µA (SA) to 1 µA (LA) and adds guaranteed 2 V data retention. They are drop-in replacements in most designs, though LA variants require validation of timing margins under low-power conditions.
7133LA20PF8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 100-LQFP
- Packaging:
- Tape & Reel (TR)
- 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:
- 20ns
- Access Time:
- 20 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)
7133LA20PF8 FAQ
1.How can I place an order for 7133LA20PF8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7133LA20PF8 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 7133LA20PF8 reliable?
The price and inventory of 7133LA20PF8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7133LA20PF8 is usually 5 days.
3.What payment methods are accepted for 7133LA20PF8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7133LA20PF8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7133LA20PF8?
7133LA20PF8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7133LA20PF8 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 7133LA20PF8?
For technical support, including 7133LA20PF8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7133LA20PF8 requirements.
6.How does Aetrix verify that 7133LA20PF8 is sourced from the original manufacturer or authorized distributors?
All 7133LA20PF8 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 7133LA20PF8 meets industry standards.
7.What is the process for return or replacement of 7133LA20PF8?
All 7133LA20PF8 units undergo pre-shipment inspection (PSI). If there is an issue with 7133LA20PF8, 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 7133LA20PF8 part is unused and in its original packaging.
Return procedure for 7133LA20PF8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7133LA20PF8 Tags
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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