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

Renesas 7134LA35L48B

Name: 7134LA35L48B
Brand: Renesas
SKU: 7134LA35L48B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 7134LA35L48B

Manufacturer:: Renesas

Category:: Memory

Package:: 48-LCC

Datasheet:: 7134LA35L48B.pdf

Description:: IC SRAM 32KBIT PARALLEL 48LCC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

7134LA35L48B from Renesas Electronics is a high-speed 4K × 8 dual-port static RAM with independent left/right asynchronous ports, 35 ns maximum read cycle time, 2 V data retention capability, and 1 µA typical full-standby current (ISB3) at military temperature range (–55°C to +125°C). It enables real-time inter-processor communication in radar signal processors and avionics bus controllers.

For engineers reviewing the 7134LA35L48B datasheet, 7134LA35L48B pinout, 7134LA35L48B application, or 7134LA35L48B equivalent, key selection criteria include dual-port arbitration-free operation, battery-backed data retention at 2 V, military-grade reliability per MIL-PRF-38535 QML, and compatibility with TTL-level 5 V ±10% supply.

Technical Context

The 7134LA35L48B implements fully asynchronous dual-port architecture with separate address, control, and I/O pins per port-no on-chip arbitration logic required. Each port features independent chip enable (CEL/CER), output enable (OEL/OER), and read/write (R/WL/R/WR) controls, enabling concurrent but externally managed access to shared memory locations.

It uses CMOS high-performance fabrication for low power: active current ≤260 mA (typ.), full standby current ≤4.0 mA (ISB3, military grade), and data retention at 2 V with ≤4000 µA ICCDR. The device supports external contention resolution and requires user-managed synchronization when both ports access the same address simultaneously.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	4K × 8 bits (32 Kbit); supports two independent 8-bit data buses without internal arbitration.
Read Cycle Time	35 ns max (military grade); enables deterministic timing in hard real-time systems like flight control interfaces.
Data Retention Voltage	2.0 V min (LA only); allows backup from low-voltage batteries or supercaps during main power loss.
Full Standby Current	4.0 mA max (ISB3, military temp); reduces system power by >99% vs active mode while preserving data.
Operating Voltage	4.5 V to 5.5 V (±10% of 5 V); compatible with standard TTL logic rails and legacy 5 V avionics supplies.
Temperature Range	–55°C to +125°C; qualified per MIL-PRF-38535 QML for deployment in engine-mounted or space-constrained military platforms.
Package	48-pin LCC (LC48); hermetically sealed ceramic package with 0.57 in × 0.57 in footprint and leadless construction for high-reliability mounting.

Pinout & Package

48-pin Leadless Ceramic Chip Carrier (LC48) package with 0.050-inch pitch, 0.57 in × 0.57 in body size, and index mark indicating Pin 1 orientation. All VCC and GND pins must be connected per datasheet note.

Pin/Terminal	Circuit Role	Design Meaning
A0L–A11L	Left-port address inputs	12-bit address bus for left-side memory access; supports full 4K address space independently of right port.
I/O0L–I/O7L	Left-port bidirectional data	8-bit TTL-compatible I/O; tri-stated when OEL = VIH or CEL = VIH to prevent bus contention.
CEL, OEL, R/WL	Left-port control signals	Chip Enable, Output Enable, Read/Write select-fully decoupled from right-port controls for true dual-port autonomy.
A0R–A11R	Right-port address inputs	Independent 12-bit address path; no electrical or timing dependency on left-port address transitions.
I/O0R–I/O7R	Right-port bidirectional data	Separate 8-bit data path; enables simultaneous read/write between processors without shared bus arbitration logic.
CER, OER, R/WR	Right-port control signals	Asynchronous enable/control set-allows right port to operate while left port is in standby or contention state.
VCC, GND	Power and ground	Multiple VCC/GND pins distributed across package for low-impedance supply delivery and noise suppression in high-speed operation.
N/C	No-connect	Pins 1 and 48 are unconnected; must remain floating-no tie-to-rail or bypass capacitor required.

Key Features

Feature	Design Value
Battery backup data retention	Operates down to 2.0 V with ≤4000 µA retention current-enables seamless failover in mission-critical power-loss scenarios.
True dual-port asynchronous access	No internal arbitration logic required; each port operates fully independently with separate clocks, controls, and timing budgets.
MIL-PRF-38535 QML qualification	Manufactured and tested to military reliability standards including screening, burn-in, and lot traceability for aerospace use.
Low-power standby modes	Four distinct standby states (ISB1–ISB4) allow granular power management-e.g., one port active while other enters 0.2 mA CMOS-level sleep.
TTL-compatible 5 V interface	Direct connection to legacy 5 V microcontrollers, FPGAs, and ASICs without level-shifting circuitry or voltage translation.

Applications

Radar Signal Processor Buffer	Avionics Bus Controller Memory
Use Scenario: Real-time buffering of digitized RF samples between ADC front-end and DSP core in airborne pulse-Doppler radar. IC Role / Device Role / Timing Role: Dual-port SRAM acts as ping-pong memory-left port accepts streaming ADC data while right port feeds processed results to FPGA-based beamformer. Use Value: 35 ns read cycle ensures sub-microsecond latency for time-critical FFT windowing; 2 V retention preserves last valid frame during brief power dips.	Use Scenario: Shared memory between ARINC 429 protocol processor and host flight management computer in integrated modular avionics (IMA). IC Role / Device Role / Timing Role: Provides non-blocking memory access for concurrent message queuing (left port) and status reporting (right port) without software arbitration overhead. Use Value: MIL-qualified LC48 package withstands vibration and thermal cycling; ISB3 <4 mA standby extends battery life in emergency backup mode.
Missile Guidance System FIFO	Secure Crypto Module Key Store
Use Scenario: First-in-first-out buffer for inertial measurement unit (IMU) data in tactical missile guidance loop with tight jitter constraints. IC Role / Device Role / Timing Role: Left port writes raw gyroscope/accelerometer samples at 10 kHz; right port reads batches for Kalman filter computation with deterministic 35 ns access. Use Value: Asynchronous dual-port eliminates wait states-critical for maintaining 100 µs control loop timing budget under dynamic acceleration.	Use Scenario: Tamper-resistant storage of cryptographic keys and session tokens in secure communications module operating in contested EM environments. IC Role / Device Role / Timing Role: Stores AES-256 keys in battery-backed SRAM; left port handles key loading via secure boot loader, right port serves keys to crypto accelerator on demand. Use Value: 2 V data retention ensures keys persist through deliberate power interruption attacks; QML screening guarantees resistance to radiation-induced bit flips.

Radar Signal Processor Buffer

Avionics Bus Controller Memory

Use Scenario: Real-time buffering of digitized RF samples between ADC front-end and DSP core in airborne pulse-Doppler radar.

IC Role / Device Role / Timing Role: Dual-port SRAM acts as ping-pong memory-left port accepts streaming ADC data while right port feeds processed results to FPGA-based beamformer.

Use Value: 35 ns read cycle ensures sub-microsecond latency for time-critical FFT windowing; 2 V retention preserves last valid frame during brief power dips.

Use Scenario: Shared memory between ARINC 429 protocol processor and host flight management computer in integrated modular avionics (IMA).

IC Role / Device Role / Timing Role: Provides non-blocking memory access for concurrent message queuing (left port) and status reporting (right port) without software arbitration overhead.

Use Value: MIL-qualified LC48 package withstands vibration and thermal cycling; ISB3 <4 mA standby extends battery life in emergency backup mode.

Missile Guidance System FIFO

Secure Crypto Module Key Store

Use Scenario: First-in-first-out buffer for inertial measurement unit (IMU) data in tactical missile guidance loop with tight jitter constraints.

IC Role / Device Role / Timing Role: Left port writes raw gyroscope/accelerometer samples at 10 kHz; right port reads batches for Kalman filter computation with deterministic 35 ns access.

Use Value: Asynchronous dual-port eliminates wait states-critical for maintaining 100 µs control loop timing budget under dynamic acceleration.

Use Scenario: Tamper-resistant storage of cryptographic keys and session tokens in secure communications module operating in contested EM environments.

IC Role / Device Role / Timing Role: Stores AES-256 keys in battery-backed SRAM; left port handles key loading via secure boot loader, right port serves keys to crypto accelerator on demand.

Use Value: 2 V data retention ensures keys persist through deliberate power interruption attacks; QML screening guarantees resistance to radiation-induced bit flips.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
7134SA35L48B	Same 4K×8 dual-port, 35 ns, LC48, military temp-but SA version has higher standby current (70 mA ISB1 vs LA's 50 mA) and no 2 V data retention.	Lacks battery backup capability; suitable only where continuous 5 V supply is guaranteed and ultra-low standby is not required.	Select SA only if cost sensitivity outweighs retention need and system lacks backup power infrastructure.
7134LA55L48B	Same LA family, LC48, military temp, 2 V retention-but slower 55 ns read cycle and lower dynamic current (220 mA vs 260 mA at fMAX).	Acceptable for less timing-critical subsystems (e.g., telemetry logging) where 20 ns margin is available for timing closure.	Choose LA55 for cost-optimized designs where 55 ns meets system timing slack and lower power draw is prioritized over speed.

Compared with 7134SA35L48B, the 7134LA35L48B delivers critical 2 V data retention and 4× lower full-standby current, while 7134LA55L48B trades 20 ns speed for reduced dynamic power-making the 7134LA35L48B optimal for timing-constrained, battery-resilient military systems.

Availability

7134LA35L48B is available at Aetrix Electronics and suitable for radar signal processors, avionics bus controllers, and missile guidance systems requiring stable component supply across extended military lifecycle requirements.

Supply support for 7134LA35L48B 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

Renesas Electronics Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and memory solutions for automotive, industrial, and aerospace markets.

The IDT7134 family-now part of Renesas' legacy high-reliability memory portfolio-was designed specifically for deterministic, arbitration-free dual-processor communication in safety-critical embedded systems.

FAQ

What is the minimum supply voltage required for data retention in the 7134LA35L48B?

The 7134LA35L48B guarantees data retention down to 2.0 V (VDR), as specified in Table 07. This applies only to the LA variant and enables operation from backup batteries or supercapacitors during main power failure. At VCC < 2.0 V, input leakage currents become undefined per Table 04, so system design must ensure retention voltage remains ≥2.0 V for reliable hold.

Does the 7134LA35L48B support simultaneous read/write operations on both ports?

Yes-the 7134LA35L48B permits fully independent asynchronous access: one port can read while the other writes, or both can read/write concurrently. However, the datasheet explicitly states that users must ensure data integrity when both ports access the same memory location simultaneously, as no internal arbitration or collision detection is provided.

What is the meaning of "L48B" in the 7134LA35L48B part number?

In the 7134LA35L48B ordering code, "L48B" denotes the LC48 package type-a 48-pin Leadless Ceramic Chip Carrier. Per the Ordering Information table (page 12), "L48B" maps directly to the LC48 footprint and is distinct from SB48 (sidebraze DIP), PDG48 (plastic DIP), or PLG52 (PLCC) variants.

How does the 7134LA35L48B handle bus contention between its two ports?

The 7134LA35L48B does not resolve bus contention internally-it places full responsibility on the system designer. When both ports drive the same data line simultaneously (e.g., one writing '1', the other reading '0'), contention occurs. Designers must implement external arbitration logic or strict software protocols to prevent overlapping writes to identical addresses, as stated in the Functional Description section.

Is the 7134LA35L48B compliant with RoHS or green manufacturing standards?

Yes-per the Features section (page 1) and Ordering Information notes (page 12), green (lead-free) versions of the 7134LA35L48B are available. Renesas confirms green parts are offered for this speed/package combination, though specific Pb-free suffixes (e.g., "G" or "#PBF") must be verified against current Renesas ordering documentation.

7134LA35L48B Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 48-LCC

Packaging:: Tube

Product Status:: Obsolete

Programmable:: Not Verified

Memory Type:: Volatile

Memory Format:: SRAM

Technology:: SRAM - Dual Port, Asynchronous

Memory Size:: 32Kbit

Memory Organization:: 4K x 8

Memory Interface:: Parallel

Clock Frequency:: -

Write Cycle Time - Word, Page:: 35ns

Access Time:: 35 ns

Voltage - Supply:: 4.5V ~ 5.5V

Operating Temperature:: -55°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 48-LCC (14.22x14.22)

7134LA35L48B FAQ

1.How can I place an order for 7134LA35L48B through Aetrix?

Please submit a Request for Quotation (RFQ) for 7134LA35L48B 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 7134LA35L48B reliable?

The price and inventory of 7134LA35L48B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7134LA35L48B is usually 5 days.

3.What payment methods are accepted for 7134LA35L48B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7134LA35L48B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 7134LA35L48B?

7134LA35L48B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 7134LA35L48B 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 7134LA35L48B?

For technical support, including 7134LA35L48B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7134LA35L48B requirements.

6.How does Aetrix verify that 7134LA35L48B is sourced from the original manufacturer or authorized distributors?

All 7134LA35L48B 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 7134LA35L48B meets industry standards.

7.What is the process for return or replacement of 7134LA35L48B?

All 7134LA35L48B units undergo pre-shipment inspection (PSI). If there is an issue with 7134LA35L48B, 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 7134LA35L48B part is unused and in its original packaging.

Return procedure for 7134LA35L48B:

1.Submit a request within 90 days.

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

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