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

Renesas 7133SA45J8

Name: 7133SA45J8
Brand: Renesas
SKU: 7133SA45J8
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 7133SA45J8

Manufacturer:: Renesas

Category:: Memory

Package:: 68-LCC (J-Lead)

Datasheet:: 7133SA45J8.pdf

Description:: IC SRAM 32KBIT PARALLEL 68PLCC

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Product details

Overview

7133SA45J8 from IDT is a high-speed 2K × 16 dual-port static RAM with master arbitration logic, 45 ns maximum read cycle time, TTL-compatible 5V ±10% operation, and industrial temperature range (–40°C to +85°C). It enables simultaneous independent access from two asynchronous ports in real-time systems such as digital signal processors and military avionics.

For engineers reviewing the 7133SA45J8 datasheet, 7133SA45J8 pinout, 7133SA45J8 application, or 7133SA45J8 equivalent, this page delivers verified timing specs, BUSY arbitration behavior, byte-select write control, power-down modes, and package-specific pin mapping for reliable integration into dual-CPU memory subsystems.

Technical Context

The 7133SA45J8 implements on-chip port arbitration logic exclusively in MASTER configuration, using open-drain BUSYL/BUSYR outputs requiring external pull-up resistors. It supports fully asynchronous dual-port reads/writes with separate upper/lower byte write enables (R/WLUB/R/WLLB and R/WRUB/R/WRLB) per port.

It features automatic power-down via chip enable (CE), with standby current as low as 1.0 mA (typ.) in full CMOS-level standby mode. Battery backup data retention at 2V is supported, with guaranteed 2.0 V_CC retention voltage and ≤4000 µA retention current under industrial conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	2K × 16 bits (32 Kbit), organized as 2048 words × 16-bit dual-port array
Access Time	45 ns max read cycle time (t_RC), enabling 22.2 MHz sustained dual-port throughput
Supply Voltage	5.0 V ±10% (4.5–5.5 V), single-rail TTL-compatible operation
Operating Temperature	–40°C to +85°C (industrial grade), qualified per MIL-PRF-38535 QML for ruggedized use
Dynamic Current	230 mA typ. (both ports active, f = f_MAX), supporting high-bandwidth real-time buffering
Standby Current	1.0 mA typ. (full CMOS standby, ISB3), enabling ultra-low-power hold mode during CPU idle
Data Retention	2.0 V minimum V_CC, ≤4000 µA ICCDR (industrial), allowing battery-backed SRAM operation

Pinout & Package

7133SA45J8 is packaged in a 68-pin PLCC (PLG68) with 0.95″ × 0.95″ footprint. Both VCC pins must be connected to 5V supply; both GND pins must be tied to ground for reliable operation.

Pin/Terminal	Circuit Role	Design Meaning
A0L–A10L / A0R–A11R	Address Inputs (Left/Right Port)	11-bit address bus per port, supporting full 2K-word addressing independently
I/O0L–I/O15L / I/O0R–I/O15R	Bidirectional Data I/O (16-bit each)	True dual-port data path; no multiplexing - simultaneous read/write possible
CEL / CER	Chip Enable (Left/Right)	Active-low per-port enable; controls power-down state and memory access gating
R/WLUB / R/WRUB	Upper Byte Write Enable (Left/Right)	Independent write control for I/O8–I/O15; enables byte-granular writes without masking logic
R/WLLB / R/WRLB	Lower Byte Write Enable (Left/Right)	Independent write control for I/O0–I/O7; critical for mixed-data-width peripheral interfacing
OEL / OER	Output Enable (Left/Right)	Tri-states I/O drivers when deasserted; allows shared bus usage with other devices
BUSYL / BUSYR	Busy Flag (Open-Drain Output)	Indicates port contention on same address; requires external pull-up; used for hardware arbitration

Key Features

Feature	Design Value
On-chip arbitration logic	Enables deterministic resolution of simultaneous accesses to identical addresses - eliminates need for external priority encoder
Separate upper/lower byte write control	Permits atomic 8-bit updates to either half of 16-bit word without read-modify-write cycles or external latch logic
Open-drain BUSY outputs with pull-up requirement	Allows wired-OR of multiple BUSY signals for system-level interrupt generation or multi-chip arbitration coordination
2V data retention capability	Supports nonvolatile memory hold during main power loss using coin-cell or supercap backup, with guaranteed 2.0 V_CC threshold
MASTER/SLAVE expandability	One 7133SA45J8 (MASTER) + multiple 7143SA45J8 (SLAVE) enables seamless 32-bit+ bus width expansion without external glue logic

Applications

Digital Signal Processor Memory Buffer	Military Avionics Real-Time Data Exchange
Use Scenario: Dual-CPU DSP system where one processor handles sensor acquisition while another performs FFT computation on shared data. IC Role / Device Role / Timing Role: 7133SA45J8 serves as zero-wait-state shared memory buffer with hardware arbitration preventing race conditions during concurrent access. Use Value: Eliminates software semaphores and polling overhead; 45 ns access ensures pipeline continuity across both CPUs without stalling.	Use Scenario: Flight control computer exchanging telemetry and command data between redundant flight management units. IC Role / Device Role / Timing Role: 7133SA45J8 operates as MIL-PRF-38535-qualified dual-port RAM enabling deterministic inter-processor communication with BUSY-driven contention resolution. Use Value: Guarantees data coherency under EMI stress and thermal cycling; 2V retention preserves critical state during brownout events.
Industrial PLC Dual-Task Memory Sharing	Test Equipment Pattern Generator Buffer
Use Scenario: Programmable logic controller running motion control loop and HMI update task on separate microcontrollers sharing status registers and I/O maps. IC Role / Device Role / Timing Role: 7133SA45J8 provides isolated, byte-selectable memory space for each task, with CE-controlled power gating to reduce system idle power. Use Value: Enables deterministic real-time response (<1 µs arbitration latency) and eliminates bus contention-induced jitter in servo timing loops.	Use Scenario: Automated test equipment generating high-speed digital stimulus patterns while simultaneously capturing response waveforms. IC Role / Device Role / Timing Role: 7133SA45J8 acts as pattern storage and capture buffer, with left port feeding pattern generator and right port receiving digitizer output. Use Value: 45 ns access and independent port timing allow >22 MHz pattern rate without FIFO bottlenecks or synchronization logic.

Digital Signal Processor Memory Buffer

Military Avionics Real-Time Data Exchange

Use Scenario: Dual-CPU DSP system where one processor handles sensor acquisition while another performs FFT computation on shared data.

IC Role / Device Role / Timing Role: 7133SA45J8 serves as zero-wait-state shared memory buffer with hardware arbitration preventing race conditions during concurrent access.

Use Value: Eliminates software semaphores and polling overhead; 45 ns access ensures pipeline continuity across both CPUs without stalling.

Use Scenario: Flight control computer exchanging telemetry and command data between redundant flight management units.

IC Role / Device Role / Timing Role: 7133SA45J8 operates as MIL-PRF-38535-qualified dual-port RAM enabling deterministic inter-processor communication with BUSY-driven contention resolution.

Use Value: Guarantees data coherency under EMI stress and thermal cycling; 2V retention preserves critical state during brownout events.

Industrial PLC Dual-Task Memory Sharing

Test Equipment Pattern Generator Buffer

Use Scenario: Programmable logic controller running motion control loop and HMI update task on separate microcontrollers sharing status registers and I/O maps.

IC Role / Device Role / Timing Role: 7133SA45J8 provides isolated, byte-selectable memory space for each task, with CE-controlled power gating to reduce system idle power.

Use Value: Enables deterministic real-time response (<1 µs arbitration latency) and eliminates bus contention-induced jitter in servo timing loops.

Use Scenario: Automated test equipment generating high-speed digital stimulus patterns while simultaneously capturing response waveforms.

IC Role / Device Role / Timing Role: 7133SA45J8 acts as pattern storage and capture buffer, with left port feeding pattern generator and right port receiving digitizer output.

Use Value: 45 ns access and independent port timing allow >22 MHz pattern rate without FIFO bottlenecks or synchronization logic.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Cypress CY7C1371D-133AXC	133 MHz QDR interface, 3.3V core, no built-in BUSY arbitration	Requires external arbitration logic for contention handling; optimized for burst-mode networking buffers	Select only if migrating to 3.3V system with QDR protocol and external arbitration infrastructure
IDT7143SA45J8	Identical speed/package but SLAVE-only; BUSY pins are inputs (not outputs); no on-chip arbitration logic	Used only in width-expanded systems paired with 7133SA45J8 MASTER; cannot operate standalone as arbitrator	Choose only as companion device in 32-bit+ memory configurations - not a functional replacement

Compared with CY7C1371D-133AXC and IDT7143SA45J8, the 7133SA45J8 uniquely integrates master arbitration logic and open-drain BUSY signaling in a 5V industrial-grade package - making it irreplaceable for legacy dual-CPU systems requiring hardware-enforced deterministic access without redesign.

Availability

7133SA45J8 is available at Aetrix Electronics and suitable for digital signal processing, military avionics, and industrial PLC applications requiring stable component supply, long-term obsolescence management, and MIL-PRF-38535-compliant sourcing.

Supply support for 7133SA45J8 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 interface, and RF solutions, now part of Renesas Electronics since 2019.

The IDT7133 family was designed specifically for deterministic dual-processor memory sharing in real-time embedded systems - emphasizing hardware arbitration, low-latency access, and ruggedized industrial/military operation.

FAQ

What is the function of the BUSY pins on the 7133SA45J8?

The BUSYL and BUSYR pins on the 7133SA45J8 are open-drain outputs that signal port contention when both ports attempt simultaneous access to the same memory location. They require external pull-up resistors and are used to stall the contending port's write operation. This hardware arbitration eliminates race conditions without software intervention - a core feature distinguishing the 7133SA45J8 from standard SRAMs.

Can the 7133SA45J8 operate with only one port enabled?

Yes, the 7133SA45J8 supports independent port operation: either port can be fully active while the other remains in standby by holding its CE pin high. In that mode, the enabled port consumes dynamic current (230 mA typ.), while the disabled port draws only 1.0 mA (typ.) in full CMOS standby (ISB3). This enables flexible power management in asymmetric dual-processor architectures.

Is the 7133SA45J8 pin-compatible with the IDT7143SA45J8?

Yes, the 7133SA45J8 and IDT7143SA45J8 share identical 68-pin PLCC pinouts and timing specifications. However, their BUSY pin functionality differs fundamentally: 7133SA45J8 has BUSY as an output (with internal arbitration logic), while IDT7143SA45J8 uses BUSY as an input only. Thus, they are mechanically compatible but not functionally interchangeable without board-level redesign.

Does the 7133SA45J8 support battery backup operation?

Yes, the 7133SA45J8 (SA variant) guarantees data retention at V_CC = 2.0 V, with typical retention current of 100 µA and maximum of 4000 µA under industrial temperature conditions. This allows direct connection to a backup battery or supercapacitor to preserve memory contents during main power failure - a key requirement in avionics and medical systems.

What is the purpose of separate upper and lower byte write enables on the 7133SA45J8?

The R/WLUB/R/WLLB (left) and R/WRUB/R/WRLB (right) pins provide independent write control for the upper (I/O8–I/O15) and lower (I/O0–I/O7) bytes of each 16-bit port. This enables atomic 8-bit updates without read-modify-write sequences - essential for interfacing with 8-bit peripherals, status registers, or mixed-width data paths while maintaining data integrity across concurrent accesses.

7133SA45J8 Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 68-LCC (J-Lead)

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:: 45ns

Access Time:: 45 ns

Voltage - Supply:: 4.5V ~ 5.5V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 68-PLCC (24.21x24.21)

7133SA45J8 FAQ

1.How can I place an order for 7133SA45J8 through Aetrix?

Please submit a Request for Quotation (RFQ) for 7133SA45J8 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 7133SA45J8 reliable?

The price and inventory of 7133SA45J8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7133SA45J8 is usually 5 days.

3.What payment methods are accepted for 7133SA45J8?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7133SA45J8 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 7133SA45J8?

7133SA45J8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 7133SA45J8 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 7133SA45J8?

For technical support, including 7133SA45J8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7133SA45J8 requirements.

6.How does Aetrix verify that 7133SA45J8 is sourced from the original manufacturer or authorized distributors?

All 7133SA45J8 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 7133SA45J8 meets industry standards.

7.What is the process for return or replacement of 7133SA45J8?

All 7133SA45J8 units undergo pre-shipment inspection (PSI). If there is an issue with 7133SA45J8, 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 7133SA45J8 part is unused and in its original packaging.

Return procedure for 7133SA45J8:

1.Submit a request within 90 days.

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

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