Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Renesas 70V38L20PFI8

Name: 70V38L20PFI8
Brand: Renesas
SKU: 70V38L20PFI8
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: 70V38L20PFI8

Manufacturer:: Renesas

Category:: Memory

Package:: 100-LQFP

Datasheet:: 70V38L20PFI8.pdf

Description:: IC SRAM 1.125MBIT PAR 100TQFP

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:3,940

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

70V38L20PFI8 from Integrated Device Technology is a high-speed 3.3V 64K × 18 true dual-port static RAM with independent left/right ports, 20 ns max access time (industrial grade), LVTTL-compatible I/O, and on-chip semaphore/arbiter logic for multiprocessor synchronization. It enables simultaneous read/write to the same memory location in master/slave or stand-alone configurations for real-time inter-processor communication in embedded control systems.

For engineers reviewing the 70V38L20PFI8 datasheet, 70V38L20PFI8 pinout, 70V38L20PFI8 application, or 70V38L20PFI8 equivalent, this device delivers deterministic port-to-port arbitration, hardware semaphore flags (8-bit), BUSY/INT signaling, and full asynchronous operation - critical for lock-free shared-memory designs in industrial automation, telecom line cards, and radar signal processors.

Technical Context

The 70V38L20PFI8 implements fully independent left and right ports with separate address buses (A0–A15), control lines (CE0/CE1, R/W, OE, UB/LB), and 18-bit bidirectional I/Os (I/O0–I/O17 per port). Its arbitration logic uses push-pull BUSY outputs (not open-drain) and supports both master (M/S = VIH) and slave (M/S = VIL) modes, where BUSY acts as output or input respectively.

It integrates dedicated semaphore registers (addressed by A0–A2) accessible via CE = VIH / SEM = VIL, enabling atomic token-passing without software polling. Interrupt flags (INTL/INTR) are triggered by writes to fixed addresses FFFE_H (left port sets right flag) and FFFF_H (right port sets left flag), with hardware-level write-inhibit during contention.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Organization	64K × 18 bits (1,152 Kbit), true dual-port SRAM with simultaneous access capability
Access Time (tAA)	20 ns max (industrial temp range –40°C to +85°C), enabling 50 MHz sustained throughput per port
Supply Voltage	3.3 V ± 0.3 V - single LVTTL-compatible rail; all VCC pins require connection
Power Consumption	Active: 135 mA typ (205 mA max); Standby (ISB1): 35 mA typ (55 mA max) - low-power for always-on subsystems
Package	100-pin TQFP (14 mm × 14 mm × 1.4 mm body), RoHS-compliant green variant available
Arbitration Support	Hardware BUSY flag with tBAA ≤ 20 ns; tAPS = 5 ns priority setup ensures deterministic resolution of address-contention events
Semaphore Logic	8 independent binary flags (A0–A2), updated via I/O0 with tSOP = 10 ns pulse width; protected against simultaneous write conflicts

Pinout & Package

70V38L20PFI8 is housed in a 100-pin Thin Quad Flatpack (TQFP) with 0.5 mm pitch, 14 mm × 14 mm footprint, and exposed thermal pad (not electrically connected). Pin numbering follows standard counter-clockwise top-view layout starting at pin 1 (OER).

Pin/Terminal	Circuit Role	Design Meaning
CE0L, CE1L / CE0R, CE1R	Dual chip enable inputs per port	Enable depth expansion without external logic; CE0/CE1 allow TTL or CMOS-active selection modes
R/WL, R/WR	Read/write control per port	Active-low; controls direction of I/O bus and initiates write cycles when asserted with CE
OEL, OER	Output enable per port	Tri-states I/O drivers independently; required for bus sharing in multi-device systems
UBL, UBR / LBL, LBR	Upper/lower byte select per port	Enables 9-bit granularity access (I/O0–I/O8 = lower; I/O9–I/O17 = upper), supporting 16-bit bus matching
SEML, SEMR	Semaphore enable per port	High = RAM mode; Low = semaphore register access (A0–A2 address semaphore flags)
BUSYL, BUSYR	Busy status per port	Push-pull output (master) or input (slave); asserts when both ports access same address - gates write internally
INTL, INTR	Interrupt flag per port	Open-drain compatible (per datasheet note 2), asserted on write to FFFE_H/FFFF_H; requires external pull-up
M/S	Master/slave configuration	VIH = BUSY outputs active; VIL = BUSY inputs - determines arbitration behavior in cascaded systems
A0L–A15L / A0R–A15R	Address inputs per port	Fully independent 16-bit address buses; support non-aligned concurrent accesses across ports
I/O0L–I/O17L / I/O0R–I/O17R	Data I/O per port	18-bit bidirectional data paths; no internal latching - timing-critical for synchronous interface design

Key Features

Feature	Design Value
True dual-port architecture	Enables concurrent read/write to identical memory locations without cycle penalty or software coordination
Hardware semaphore engine	8 dedicated, atomic-access flags (A0–A2) eliminate race conditions in resource-locking protocols
Configurable BUSY arbitration	Master mode provides automatic write-inhibit on conflict; slave mode accepts external BUSY control for hierarchical systems
Asynchronous port independence	No timing dependency between left/right ports - each operates at its own maximum frequency up to 50 MHz
Low-power standby modes	ISB3 = 0.2 mA typ full standby (CMOS-level inputs); supports rapid wake-up without initialization delay
Industrial temperature rating	–40°C to +85°C operation verified; suitable for uncontrolled environments in motor drives and base stations

Applications

Industrial Motion Control	Telecom Line Card Buffering
Use Scenario: Two DSPs coordinate servo loop execution and sensor data acquisition in real time using shared memory. IC Role / Device Role / Timing Role: 70V38L20PFI8 serves as synchronized message-passing buffer with hardware semaphores preventing simultaneous write to motion command registers. Use Value: Eliminates software mutex overhead, guarantees sub-20 ns response to position error interrupts, and sustains 50 MHz data exchange under worst-case thermal stress.	Use Scenario: Line card ASIC and network processor share packet header metadata and status flags across a high-throughput backplane interface. IC Role / Device Role / Timing Role: 70V38L20PFI8 acts as dual-access FIFO controller with BUSY-driven flow control, decoupling variable-rate ingress/egress traffic. Use Value: Prevents packet loss during burst traffic by enabling zero-wait-state handshaking and deterministic arbitration at 50 MHz per port.
Radar Signal Processing	Medical Imaging Data Pipeline
Use Scenario: FPGA-based beamformer and ARM host processor exchange FFT coefficients and calibration tables during continuous RF sampling. IC Role / Device Role / Timing Role: 70V38L20PFI8 functions as low-latency inter-processor scratchpad with interrupt-triggered DMA transfers via INTL/INTR flags. Use Value: Achieves <1 µs latency from ADC capture to processing start, meeting real-time deadlines for Doppler shift analysis.	Use Scenario: Ultrasound front-end ASIC and image reconstruction CPU share raw echo data and scan parameters in a safety-critical imaging chain. IC Role / Device Role / Timing Role: 70V38L20PFI8 provides fault-tolerant dual-port buffer with semaphore-protected memory regions for DICOM header updates. Use Value: Ensures data coherency across power domains and prevents corruption during hot-swap of processing modules.

Industrial Motion Control

Telecom Line Card Buffering

Use Scenario: Two DSPs coordinate servo loop execution and sensor data acquisition in real time using shared memory.

IC Role / Device Role / Timing Role: 70V38L20PFI8 serves as synchronized message-passing buffer with hardware semaphores preventing simultaneous write to motion command registers.

Use Value: Eliminates software mutex overhead, guarantees sub-20 ns response to position error interrupts, and sustains 50 MHz data exchange under worst-case thermal stress.

Use Scenario: Line card ASIC and network processor share packet header metadata and status flags across a high-throughput backplane interface.

IC Role / Device Role / Timing Role: 70V38L20PFI8 acts as dual-access FIFO controller with BUSY-driven flow control, decoupling variable-rate ingress/egress traffic.

Use Value: Prevents packet loss during burst traffic by enabling zero-wait-state handshaking and deterministic arbitration at 50 MHz per port.

Radar Signal Processing

Medical Imaging Data Pipeline

Use Scenario: FPGA-based beamformer and ARM host processor exchange FFT coefficients and calibration tables during continuous RF sampling.

IC Role / Device Role / Timing Role: 70V38L20PFI8 functions as low-latency inter-processor scratchpad with interrupt-triggered DMA transfers via INTL/INTR flags.

Use Value: Achieves <1 µs latency from ADC capture to processing start, meeting real-time deadlines for Doppler shift analysis.

Use Scenario: Ultrasound front-end ASIC and image reconstruction CPU share raw echo data and scan parameters in a safety-critical imaging chain.

IC Role / Device Role / Timing Role: 70V38L20PFI8 provides fault-tolerant dual-port buffer with semaphore-protected memory regions for DICOM header updates.

Use Value: Ensures data coherency across power domains and prevents corruption during hot-swap of processing modules.

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 CY7C028V-20AC	64K × 16 organization, 20 ns access, 3.3 V supply; lacks integrated semaphore logic and M/S pin	Requires external arbitration logic for multiprocessor use; limited to 16-bit data path	Select when 16-bit bus width suffices and semaphore functionality is implemented in FPGA firmware
Renesas R1EX24064AS0C-20	64K × 18, 20 ns, 3.3 V; includes JTAG debug interface but no BUSY/INT hardware signals	No native port arbitration - relies on software polling or external CPLD for conflict resolution	Prefer for debug-rich environments where traceability outweighs real-time determinism

Compared with CY7C028V-20AC and R1EX24064AS0C-20, the 70V38L20PFI8 uniquely integrates hardware semaphore, BUSY arbitration, and interrupt generation - reducing BOM count, eliminating timing-critical software locks, and guaranteeing sub-20 ns contention resolution in safety-critical systems.

Availability

70V38L20PFI8 is available at Aetrix Electronics and suitable for industrial motion control, telecom line card buffering, radar signal processing, and medical imaging data pipeline applications requiring stable component supply across extended product lifecycles.

Supply support for 70V38L20PFI8 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

Integrated Device Technology (IDT), now part of Renesas Electronics, is a fabless semiconductor company specializing in high-performance timing, memory interface, and RF power solutions for communications and computing infrastructure.

The 70V38L20PFI8 belongs to IDT's legacy high-speed dual-port SRAM family, engineered specifically for deterministic inter-processor communication in real-time embedded systems where hardware-enforced synchronization eliminates software-induced jitter.

FAQ

What is the operating temperature range certified for the 70V38L20PFI8?

The 70V38L20PFI8 is rated for industrial temperature operation from –40°C to +85°C, with all AC/DC specifications guaranteed across this range. This includes 20 ns maximum access time (tAA), 55 mA maximum standby current (ISB1), and full functionality of BUSY/INT/SEM logic under thermal stress - validated per datasheet revision DSC-4850/7.

How does the M/S pin affect BUSY pin behavior in the 70V38L20PFI8?

When M/S = VIH, BUSYL and BUSYR operate as push-pull outputs that assert HIGH during address-contention events and gate writes internally. When M/S = VIL, both BUSY pins become inputs - allowing external arbitration logic to drive them LOW to inhibit writes on the corresponding port. This dual-mode supports both autonomous and hierarchical system architectures.

Can the 70V38L20PFI8 be used without enabling the semaphore or interrupt features?

Yes. The 70V38L20PFI8 functions as a standard dual-port SRAM when SEM = VIH and INTL/INTR addresses (FFFE_H/FFFF_H) are treated as regular memory locations. Semaphore and interrupt logic remain inactive but do not impact timing or power - all 64K × 18 bits remain fully accessible for general-purpose storage.

What package variant does the suffix 'PFI8' indicate for the 70V38L20PFI8?

The 'PFI8' suffix denotes a 100-pin TQFP package (PNG100) with lead-free, RoHS-compliant green construction, industrial temperature rating (–40°C to +85°C), and tape-and-reel packaging (800 units per reel). This matches the mechanical dimensions and pinout specified in datasheet drawing 4850 drw 02.

Does the 70V38L20PFI8 support depth expansion, and how is it implemented?

Yes. The 70V38L20PFI8 supports depth expansion using dual CE0/CE1 enables per port - enabling cascading of multiple devices without external decode logic. For example, two 70V38L20PFI8 units can form a 128K × 18 memory with CE1L/CE1R selecting the upper half and CE0L/CE0R selecting the lower half, maintaining full 20 ns access performance.

70V38L20PFI8 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:: 1.125Mbit

Memory Organization:: 64K x 18

Memory Interface:: Parallel

Clock Frequency:: -

Write Cycle Time - Word, Page:: 20ns

Access Time:: 20 ns

Voltage - Supply:: 3V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 100-TQFP (14x14)

70V38L20PFI8 FAQ

1.How can I place an order for 70V38L20PFI8 through Aetrix?

Please submit a Request for Quotation (RFQ) for 70V38L20PFI8 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 70V38L20PFI8 reliable?

The price and inventory of 70V38L20PFI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V38L20PFI8 is usually 5 days.

3.What payment methods are accepted for 70V38L20PFI8?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V38L20PFI8 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 70V38L20PFI8?

70V38L20PFI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 70V38L20PFI8 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 70V38L20PFI8?

For technical support, including 70V38L20PFI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V38L20PFI8 requirements.

6.How does Aetrix verify that 70V38L20PFI8 is sourced from the original manufacturer or authorized distributors?

All 70V38L20PFI8 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 70V38L20PFI8 meets industry standards.

7.What is the process for return or replacement of 70V38L20PFI8?

All 70V38L20PFI8 units undergo pre-shipment inspection (PSI). If there is an issue with 70V38L20PFI8, 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 70V38L20PFI8 part is unused and in its original packaging.

Return procedure for 70V38L20PFI8:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…