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Renesas 7133LA55GB
- Part No.:
- 7133LA55GB
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-BPGA
- Datasheet:
-
7133LA55GB.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 68PGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,054
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Product details
Overview
7133LA55GB from IDT (Integrated Device Technology) is a high-speed, low-power 2K × 16-bit dual-port static RAM configured as a MASTER device with on-chip arbitration logic, 55 ns maximum read cycle time, 2V data retention capability, and industrial temperature range (–40°C to +85°C). It enables error-free 32-bit-or-wider memory expansion when paired with IDT7143 SLAVE devices in real-time embedded control systems.
For engineers reviewing the 7133LA55GB datasheet, 7133LA55GB pinout, 7133LA55GB application, or 7133LA55GB equivalent, this page delivers verified timing parameters, byte-select write control, BUSY arbitration behavior, battery backup operation, and package-specific pin mapping for reliable system integration.
Technical Context
The 7133LA55GB implements fully asynchronous dual-port access with independent left/right address, control, and I/O buses. Its on-chip arbitration logic resolves port contention by asserting open-drain BUSYL/BUSYR outputs-requiring external pull-up resistors-and supports priority-based write inhibition during simultaneous access to identical addresses.
It features separate upper/lower byte write enables (R/WLUB/R/WLLB and R/WRUB/R/WRLB), TTL-compatible 5V ±10% single-supply operation, and automatic power-down via chip enable (CE/CER), achieving 1 mW typical standby power. The LA variant guarantees 2V data retention with ≤4 mA retention current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 2K × 16-bit (32,768 bits), dual-port SRAM with independent left/right access paths |
| Max Read Cycle Time | 55 ns - defines minimum time between successive reads on same port without data corruption |
| Data Retention Voltage | 2.0 V - enables battery-backed operation during main power loss; retains data without refresh |
| Standby Current (ISB3) | 0.2 mA typ. - ultra-low full-standby power when both CE pins held at CMOS high/low thresholds |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including motor drives and PLCs |
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5V TTL logic rails; no external regulation required |
| Bus Arbitration | Hardware BUSY flag with tBDD ≤ 35 ns - ensures deterministic resolution of port conflicts in real-time systems |
Pinout & Package
7133LA55GB is packaged in a 68-pin PLCC (PLG68) with 0.05-inch lead pitch and 0.95″ × 0.95″ body size. Both VCC and GND pins must be connected for reliable operation per datasheet Note 1 and 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A10L / A0R–A10R | Address Inputs (Left/Right) | 11-bit address bus per port; selects one of 2K locations independently |
| I/O0L–I/O15L / I/O0R–I/O15R | Bidirectional Data I/O (Left/Right) | 16-bit parallel data path per port; high-impedance when OE inactive or CE deasserted |
| CEL / CER | Chip Enable (Left/Right) | Active-low enable controlling port activation and power-down mode; ISB3 achieved when both > VCC−0.2V |
| R/WLUB / R/WRUB | Upper Byte Write Enable (Left/Right) | Controls write to I/O8–I/O15; allows byte-granular writes without disturbing lower byte |
| R/WLLB / R/WRLB | Lower Byte Write Enable (Left/Right) | Controls write to I/O0–I/O7; enables mixed-mode read/write operations on same cycle |
| OEL / OER | Output Enable (Left/Right) | Active-low control of output drivers; overrides R/W state for read-only access |
| BUSYL / BUSYR | Busy Flag (Open-Drain Output) | Indicates port contention; requires external pull-up; used to stall CPU or gate write signals |
| VCC (×2) / GND (×2) | Power Supply / Ground | Dual VCC/GND pairs ensure stable voltage distribution across high-speed switching I/O banks |
Key Features
| Feature | Design Value |
|---|---|
| On-chip arbitration logic | Resolves simultaneous left/right access to same address without external logic or software intervention |
| Separate upper/lower byte write control | Enables partial-word writes (8-bit granularity) while preserving integrity of adjacent byte in real-time buffers |
| 2V data retention mode | Retains stored data during main power failure using backup battery; validated at 100 µA typical ICCDR |
| Open-drain BUSY outputs | Allows wired-OR of multiple BUSY signals for system-level interrupt generation or global stall signaling |
| MASTER/SLAVE expandability | Supports seamless 32-bit+ data bus expansion using IDT7143 SLAVE devices with no added glue logic |
Applications
| Industrial Motion Control | Real-Time Communication Buffer |
|---|---|
Use Scenario: Synchronized servo axis coordination in CNC machines requiring deterministic memory access between motion controller and FPGA-based interpolator. IC Role / Device Role / Timing Role: MASTER 7133LA55GB acts as shared memory hub with hardware arbitration, enabling lock-free dual-CPU access to position/velocity tables. Use Value: 55 ns tRC and sub-35 ns tBDD guarantee jitter-free updates under worst-case contention, eliminating software mutex overhead. |
Use Scenario: Full-duplex packet buffering in industrial Ethernet gateways handling concurrent Modbus TCP and EtherCAT traffic. IC Role / Device Role / Timing Role: Dual-port SRAM serves as ping-pong buffer between MAC layer (right port) and protocol stack (left port), with BUSY managing cross-port write collisions. Use Value: Independent byte-write enables header/payload separation without read-modify-write cycles, reducing latency by ≥20% vs. single-port alternatives. |
| Redundant Power System Monitor | Avionics Data Acquisition |
Use Scenario: Battery-backed health monitoring in UPS systems where primary MCU logs events while backup controller verifies integrity during brownouts. IC Role / Device Role / Timing Role: 7133LA55GB provides nonvolatile shadow RAM; left port writes live telemetry, right port reads for watchdog validation. Use Value: 2V data retention ensures 72+ hours of event logging on coin-cell backup; ISB3 < 0.2 mA extends battery life beyond 5 years. |
Use Scenario: Sensor fusion in flight control units aggregating inertial, pressure, and temperature data from multiple ADCs before FPGAs process Kalman filters. IC Role / Device Role / Timing Role: MASTER SRAM buffers raw sensor streams (left port) and feeds processed results (right port) to safety-critical ARM core. Use Value: Industrial temp rating (–40°C to +85°C) and MIL-PRF-38535 QML-compliant variants ensure operation across aircraft thermal zones. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT7143LA55GB | SLAVE-only variant; BUSY pins are inputs only; no arbitration logic; identical timing and pinout | Used exclusively in width-expanded systems with a 7133LA master; cannot operate stand-alone as memory hub | Select when building 32-bit+ memory arrays requiring hardware-controlled write blocking without local arbitration |
| CY7C028V-55AXC | Cypress 2K × 16 dual-port with 55 ns speed, but lacks 2V data retention and uses different BUSY implementation (push-pull) | Requires external level-shifting for battery backup; no native support for IDT-style MASTER/SLAVE chaining | Choose for legacy Cypress-based designs where pin compatibility is secondary to supply chain continuity |
Compared with IDT7143LA55GB and CY7C028V-55AXC, the 7133LA55GB uniquely integrates on-chip arbitration and open-drain BUSY for deterministic contention resolution, making it the only option for standalone dual-CPU shared memory without external logic.
Availability
7133LA55GB is available at Aetrix Electronics and suitable for industrial motion control, real-time communication buffers, and redundant power system monitors requiring stable component supply across extended product lifecycles.
Supply support for 7133LA55GB 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.
The IDT7133/7143 family was designed specifically for deterministic dual-processor systems requiring hardware-arbitrated shared memory in industrial automation, avionics, and telecom infrastructure.
FAQ
What is the function of the BUSY pin on the 7133LA55GB?
The BUSY pin on the 7133LA55GB is an open-drain output that signals port contention when both left and right ports attempt simultaneous access to the same memory location. It must be externally pulled up and is used to stall the contending port's write operation until arbitration completes. This behavior is intrinsic to the MASTER role and differs from the SLAVE-only IDT7143LA55GB, where BUSY is an input.
Does the 7133LA55GB support true 2V data retention, and what conditions apply?
Yes, the 7133LA55GB supports guaranteed 2V data retention per datasheet Table 8. When VCC drops to 2.0 V, the device maintains stored data with ICCDR ≤ 4000 µA (military grade) or ≤ 1500 µA (commercial/industrial), provided CE pins are held at valid CMOS levels and ambient temperature remains within specification. No refresh is required during retention mode.
Can the 7133LA55GB operate as a stand-alone dual-port RAM without a SLAVE device?
Yes, the 7133LA55GB functions fully as a stand-alone 16-bit dual-port SRAM with complete arbitration, BUSY signaling, and byte-select write control. Its MASTER capability is optional-used only when expanding data width beyond 16 bits with IDT7143 SLAVE devices. All timing, control, and memory functions operate identically in stand-alone mode.
What is the significance of the 'LA' suffix in 7133LA55GB?
The 'LA' suffix in 7133LA55GB denotes the Low-Power Active/Standby variant: it consumes 1050 mW typical active power and only 1 mW typical standby power-significantly lower than the SA (Standard Active) version's 1150 mW/5 mW. This enables thermally constrained designs and extends battery life in retention mode without sacrificing 55 ns performance.
How does the 7133LA55GB handle simultaneous writes to the same address from both ports?
The 7133LA55GB uses hardware arbitration to resolve simultaneous writes: the port asserting address first wins, while the losing port's BUSY pin activates, gating its write signal internally. The tAPS (Arbitration Priority Set-up Time) of 5 ns ensures deterministic resolution. Valid data appears on the winning port's I/O after tBDD ≤ 35 ns, preventing metastability or corrupted writes.
7133LA55GB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 68-BPGA
- Packaging:
- Tube
- 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:
- 55ns
- Access Time:
- 55 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 68-PGA (29.46x29.46)
7133LA55GB FAQ
1.How can I place an order for 7133LA55GB through Aetrix?
Please submit a Request for Quotation (RFQ) for 7133LA55GB 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 7133LA55GB reliable?
The price and inventory of 7133LA55GB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7133LA55GB is usually 5 days.
3.What payment methods are accepted for 7133LA55GB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7133LA55GB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7133LA55GB?
7133LA55GB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7133LA55GB 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 7133LA55GB?
For technical support, including 7133LA55GB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7133LA55GB requirements.
6.How does Aetrix verify that 7133LA55GB is sourced from the original manufacturer or authorized distributors?
All 7133LA55GB 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 7133LA55GB meets industry standards.
7.What is the process for return or replacement of 7133LA55GB?
All 7133LA55GB units undergo pre-shipment inspection (PSI). If there is an issue with 7133LA55GB, 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 7133LA55GB part is unused and in its original packaging.
Return procedure for 7133LA55GB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7133LA55GB Tags
-
M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
Microchip Technology
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24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
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24LC01BT-I/SN
Microchip Technology
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24AA02UIDT-I/OT
Microchip Technology
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AT24C08C-STUM-T
Microchip Technology
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