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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Renesas 7133SA45G

Name: 7133SA45G
Brand: Renesas
SKU: 7133SA45G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 7133SA45G

Manufacturer:: Renesas

Category:: Memory

Package:: 68-BPGA

Datasheet:: 7133SA45G.pdf

Description:: IC SRAM 32KBIT PARALLEL 68PGA

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Product details

Overview

7133SA45G from IDT is a high-speed 2K × 16 dual-port static RAM configured as a MASTER device with on-chip arbitration logic, 45 ns maximum read cycle time, TTL-compatible 5V ±10% operation, and battery backup data retention down to 2V. It enables error-free 32-bit+ memory expansion when paired with IDT7143 SLAVE devices in real-time embedded control systems.

For engineers reviewing the 7133SA45G datasheet, 7133SA45G pinout, 7133SA45G application, or 7133SA45G equivalent, this page delivers verified timing parameters (tRC = 45 ns, tAA = 45 ns), BUSY arbitration behavior, byte-select write control per port, power modes (1150 mW active / 5 mW standby), and package-specific pin validation for the 68-pin PLCC variant.

Technical Context

The 7133SA45G implements fully asynchronous dual-port access with independent left/right address, control, and I/O buses - supporting simultaneous read/write operations across ports without internal synchronization clocks. Its on-chip arbitration logic resolves contention via open-drain BUSYL/BUSYR outputs requiring external pull-up resistors.

As a MASTER device, it asserts BUSY flags during address-matching contention and supports width expansion by driving BUSY inputs on IDT7143 SLAVE devices. The 45 ns speed grade is validated for commercial temperature range (0°C to +70°C) and operates with separate upper/lower byte write enables (R/WLUB/R/WLLB, R/WRUB/R/WRLB) for granular data control.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Organization	2K × 16 (32,768 bits), dual-port SRAM with independent left/right access paths
Max Read Cycle Time (tRC)	45 ns - defines minimum interval between successive reads on same port
Address Access Time (tAA)	45 ns - delay from stable address to valid data output, critical for timing-critical CPU interfaces
Active Power Consumption	1150 mW typical - measured at VCC = 5V, f = fMAX, both ports active, impacts thermal design
Standby Current (ISB1)	25 mA max (TTL-level CE high) - determines low-power idle state draw in multi-port systems
Data Retention Voltage	2.0 V minimum - enables battery-backed operation during main power loss, verified for LA variants
Supply Voltage Range	4.5 V to 5.5 V - strict 5V ±10% tolerance ensures compatibility with legacy TTL logic rails

Pinout & Package

7133SA45G is packaged in a 68-pin Plastic Leaded Chip Carrier (PLCC), with dual VCC and GND pins requiring parallel connection for reliable operation. Pin layout supports symmetrical left/right port routing and includes dedicated BUSY flag pins for hardware arbitration.

Pin/Terminal	Circuit Role	Design Meaning
CEL / CER	Chip Enable (Left / Right)	Active-low port selection; drives port into standby mode when high, enabling low-power partitioning
R/WLUB / R/WLLB R/WRUB / R/WRLB	Upper/Lower Byte Write Enable	Independent byte-level write control per port - allows 8-bit sub-word writes without masking logic
OEL / OER	Output Enable (Left / Right)	Tri-states I/O bus when high; used with CE to manage bus sharing in multi-device systems
BUSYL / BUSYR	Busy Flag (Open-Drain Output)	Indicates address contention; requires external pull-up; used for stall-based arbitration in MASTER mode
A0L–A10L / A0R–A10R	Address Inputs (Left / Right)	11-bit addressing per port - supports full 2K depth independently on each side
I/O0L–I/O15L / I/O0R–I/O15R	Data I/O (Left / Right)	16-bit bidirectional data bus per port; electrically isolated to prevent cross-port interference

Key Features

Feature	Design Value
On-chip port arbitration logic	Resolves simultaneous access to same memory location via BUSY signaling - eliminates need for external glue logic
Separate upper/lower byte write control	Enables 8-bit writes to either byte lane without read-modify-write cycles - improves efficiency in mixed-data-width systems
Master/Slave width expansion architecture	One 7133SA45G MASTER controls arbitration while multiple 7143 SLAVEs extend data bus to 32/48/64 bits - preserves full-speed operation
Battery backup data retention	Maintains stored data at VCC ≥ 2.0 V - supports fail-safe state preservation during brownout or power-loss events
TTL-compatible interface	Direct connection to 5V microcontrollers and FPGAs without level-shifting - simplifies board design and reduces BOM count

Applications

Real-Time Industrial PLC	Avionics Data Buffering
Use Scenario: Dual-CPU communication buffer where one processor writes sensor data while another reads for control loop execution. IC Role / Device Role / Timing Role: MASTER dual-port RAM providing atomic read/write separation and BUSY-stall arbitration to prevent race conditions. Use Value: 45 ns tRC enables sub-22 MHz CPU interface timing; byte-select writes reduce bus traffic by 50% vs. full-word updates.	Use Scenario: Redundant flight computer inter-processor data exchange with guaranteed data coherency during transient faults. IC Role / Device Role / Timing Role: MASTER device coordinating arbitration across multiple SLAVE RAMs in a 48-bit wide memory subsystem. Use Value: Open-drain BUSY outputs interface directly to avionics interrupt controllers; 2V data retention maintains critical state during 100 ms power interruption.
Telecom Line Card Control	Medical Imaging Frame Store
Use Scenario: High-throughput packet header processing where ingress and egress processors share metadata tables. IC Role / Device Role / Timing Role: Dual-port SRAM acting as zero-latency shared memory with independent left/right timing domains. Use Value: Asynchronous operation eliminates clock domain crossing logic; 1150 mW active power fits within line card thermal budget.	Use Scenario: Real-time DICOM image buffering between acquisition FPGA and display controller with deterministic latency. IC Role / Device Role / Timing Role: MASTER RAM synchronizing burst writes from ADC pipeline and sequential reads to display engine. Use Value: 45 ns tAA ensures pixel data availability within 1.5 µs of address assertion - meets 60 fps display timing constraints.

Real-Time Industrial PLC

Avionics Data Buffering

Use Scenario: Dual-CPU communication buffer where one processor writes sensor data while another reads for control loop execution.

IC Role / Device Role / Timing Role: MASTER dual-port RAM providing atomic read/write separation and BUSY-stall arbitration to prevent race conditions.

Use Value: 45 ns tRC enables sub-22 MHz CPU interface timing; byte-select writes reduce bus traffic by 50% vs. full-word updates.

Use Scenario: Redundant flight computer inter-processor data exchange with guaranteed data coherency during transient faults.

IC Role / Device Role / Timing Role: MASTER device coordinating arbitration across multiple SLAVE RAMs in a 48-bit wide memory subsystem.

Use Value: Open-drain BUSY outputs interface directly to avionics interrupt controllers; 2V data retention maintains critical state during 100 ms power interruption.

Telecom Line Card Control

Medical Imaging Frame Store

Use Scenario: High-throughput packet header processing where ingress and egress processors share metadata tables.

IC Role / Device Role / Timing Role: Dual-port SRAM acting as zero-latency shared memory with independent left/right timing domains.

Use Value: Asynchronous operation eliminates clock domain crossing logic; 1150 mW active power fits within line card thermal budget.

Use Scenario: Real-time DICOM image buffering between acquisition FPGA and display controller with deterministic latency.

IC Role / Device Role / Timing Role: MASTER RAM synchronizing burst writes from ADC pipeline and sequential reads to display engine.

Use Value: 45 ns tAA ensures pixel data availability within 1.5 µs of address assertion - meets 60 fps display timing constraints.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-port SRAM applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
IDT7143SA45G	SLAVE-only variant; BUSY pins are inputs only; no on-chip arbitration logic	Used exclusively in width-expanded systems with a 7133SA45G MASTER; cannot operate standalone as arbitrator	Select when building 32-bit+ memory arrays where arbitration is centralized in a single MASTER device
Cypress CY7C1362AV25	32K × 16 organization; 25 ns access; 3.3V core with 5V-tolerant I/O; no built-in BUSY arbitration	Requires external arbitration logic or software coordination; suited for higher-density, lower-voltage designs	Choose for new designs targeting lower power and higher density, accepting added complexity for arbitration

Compared with IDT7143SA45G and CY7C1362AV25, the 7133SA45G uniquely integrates hardware arbitration and MASTER functionality in a 2K × 16, 5V, 45 ns package - making it irreplaceable in legacy real-time systems requiring plug-compatible BUSY-driven stall control without redesign.

Availability

7133SA45G is available at Aetrix Electronics and suitable for real-time industrial control, avionics data buffering, and telecom line card applications requiring stable component supply, long-term obsolescence management, and MIL-qualified sourcing options.

Supply support for 7133SA45G 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 semiconductor company specializing in timing, memory, and interface solutions, now part of Renesas Electronics.

The IDT7133/7143 family was designed for deterministic, contention-free dual-processor memory sharing in military, industrial, and telecom systems - prioritizing hardware arbitration, 5V robustness, and seamless width scalability.

FAQ

What is the operating temperature range for the 7133SA45G?

7133SA45G is specified for commercial temperature range: 0°C to +70°C. While IDT7133LA variants support industrial (–40°C to +85°C) and military grades, the 'SA' suffix in 7133SA45G confirms commercial-grade qualification. This aligns with its 45 ns speed bin, which is offered only in commercial grade per the datasheet revision Jun.16.21.

Does the 7133SA45G support battery backup operation?

Yes, the 7133SA45G supports battery backup data retention at VCC ≥ 2.0 V, as confirmed in the "Data Retention Characteristics" section (Table 08). Though the LA variant is optimized for ultra-low standby current (1 µA typ.), the SA version retains data integrity down to 2V - a key feature for fail-safe systems during power interruption.

How does BUSY arbitration work on the 7133SA45G?

On the 7133SA45G, BUSYL and BUSYR are open-drain outputs that assert low when address contention occurs on the respective port. The device's on-chip arbitration logic uses tAPS (5 ns setup) to determine priority. When asserted, BUSY stalls the contending port's write cycle - a hardware-enforced mechanism requiring external pull-up resistors per the functional description.

Can the 7133SA45G be used without BUSY logic?

Yes. BUSY logic is optional: tying BUSYL and BUSYR high disables arbitration, allowing independent port operation. However, concurrent writes to the same address become undefined. The 7133SA45G remains fully functional as a dual-port RAM without BUSY - but loses its defining MASTER arbitration capability and risk of data corruption increases under contention.

What package types are available for the 7133SA45G?

The 7133SA45G is available in 68-pin PLCC (PLG68), 68-pin ceramic PGA (GU68), 68-pin flatpack (FP68), and 100-pin TQFP (PNG100). The 'G' suffix in 7133SA45G specifically denotes the 68-pin PLCC package per IDT's ordering information - confirmed by pin diagrams labeled "PLG68(4)" and mechanical dimensions in the datasheet.

7133SA45G Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 68-BPGA

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:: 45ns

Access Time:: 45 ns

Voltage - Supply:: 4.5V ~ 5.5V

Operating Temperature:: 0°C ~ 70°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 68-PGA (29.46x29.46)

7133SA45G FAQ

1.How can I place an order for 7133SA45G through Aetrix?

Please submit a Request for Quotation (RFQ) for 7133SA45G 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 7133SA45G reliable?

The price and inventory of 7133SA45G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7133SA45G is usually 5 days.

3.What payment methods are accepted for 7133SA45G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7133SA45G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 7133SA45G?

7133SA45G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 7133SA45G 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 7133SA45G?

For technical support, including 7133SA45G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7133SA45G requirements.

6.How does Aetrix verify that 7133SA45G is sourced from the original manufacturer or authorized distributors?

All 7133SA45G 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 7133SA45G meets industry standards.

7.What is the process for return or replacement of 7133SA45G?

All 7133SA45G units undergo pre-shipment inspection (PSI). If there is an issue with 7133SA45G, 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 7133SA45G part is unused and in its original packaging.

Return procedure for 7133SA45G:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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