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

Renesas 7204L15SOGI

Name: 7204L15SOGI
Brand: Renesas
SKU: 7204L15SOGI
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 7204L15SOGI

Manufacturer:: Renesas

Category:: FIFOs Memory

Package:: 28-SOIC (0.345", 8.77mm Width)

Datasheet:: 7204L15SOGI.pdf

Description:: IC FIFO ASYNC 4KX9 15NS 28SOIC

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Product details

Overview

IDT7204L15SOGI from Integrated Device Technology is a 4,096 x 9-bit asynchronous CMOS FIFO memory buffer with 15 ns access time, industrial temperature range (–40°C to +85°C), and SOIC-28 package. It supports simultaneous read/write operations, features Empty/Full/Half-Full status flags, and enables retransmit functionality for data pointer reset - used in rate-matching interfaces between mismatched clock domains in industrial control systems.

For engineers reviewing the IDT7204L15SOGI datasheet, IDT7204L15SOGI pinout, IDT7204L15SOGI application, or IDT7204L15SOGI equivalent, key selection criteria include guaranteed 15 ns access time at industrial temperature, dual-port asynchronous operation without external arbitration, 9-bit data width supporting parity/control bit, and compatibility with depth/width expansion architectures for scalable buffering.

Technical Context

The IDT7204L15SOGI implements a fully asynchronous dual-port architecture with independent write and read pointers managed by internal logic. It uses Full (FF), Empty (EF), and Half-Full (XO/HF) flags to prevent overflow/underflow, and supports retransmit (RT) to reset the read pointer without affecting the write pointer.

It operates in Single Device Mode when Expansion In (XI) is grounded, enabling the Half-Full Flag; in Depth Expansion Mode, XI connects to XO of the prior device and HF/RT are disabled. The device requires no external clock synchronization and tolerates independent read/write timing with setup/hold constraints defined per AC specs.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Depth × Width	4,096 words × 9 bits - provides 36,864-bit buffer capacity with one bit available for parity or control signaling.
Access Time (t_A)	15 ns max - guarantees deterministic latency for read data valid after read enable assertion, critical for real-time buffering.
Supply Voltage (V_CC)	4.5 V to 5.5 V - compatible with standard 5 V TTL/CMOS logic families and industrial power rails.
Operating Temperature	–40°C to +85°C - qualified for industrial environments including factory automation and motor control cabinets.
Power Consumption	Active: ≤120 mA (660 mW max); Power-down: ≤2 mA (10 mW max) - enables low-power idle states in burst-mode systems.
Status Flags	EF (Empty), FF (Full), XO/HF (Half-Full or Expansion Out) - hardware-signaled flow control eliminating software polling overhead.
Retransmit Function	RT input resets read pointer to first location on LOW pulse - supports repeat-read protocols without data loss or pointer misalignment.

Pinout & Package

Package: 28-pin Small Outline Integrated Circuit (SOIC), surface-mount, 300 mil body width, compliant with JEDEC MS-012.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4, 5, 6, 7, 8, 9	Data Inputs (D0–D8)	9-bit parallel write data bus; latched on falling edge of W; supports parity or control bit assignment.
10, 11, 12, 13, 14, 15, 16, 17, 18	Data Outputs (Q0–Q8)	9-bit parallel read data bus; three-state enabled only when R = LOW; high-impedance otherwise.
19	Write Enable (W)	Falling-edge triggered write strobe; initiates storage of D0–D8 into next FIFO location if FF = HIGH.
20	Read Enable (R)	Falling-edge triggered read strobe; outputs Q0–Q8 from current read pointer if EF = HIGH.
21	Reset (RS)	Active-LOW synchronous reset; forces both read and write pointers to location zero; required before first write.
22	Expansion In / First Load (XI/FL)	Grounded for single-device mode (enables HF); tied to XO of prior device in depth expansion (disables HF/RT).
23	Retransmit / First Load (FL/RT)	Active-LOW retransmit trigger; resets read pointer to start address without altering write pointer or data contents.
24	Full Flag (FF)	Active-LOW open-drain output; asserts when FIFO is full (write pointer = read pointer – 1), blocking further writes.
25	Empty Flag (EF)	Active-LOW open-drain output; asserts when FIFO is empty (read pointer = write pointer), blocking further reads.
26	Expansion Out / Half-Full (XO/HF)	Dual-function: in single mode, active-LOW HF flag at 50% fill; in expansion mode, pulse output signaling end-of-memory to next device.
27	V_CC	+5 V supply pin - must be decoupled locally with 0.1 µF ceramic capacitor near pin.
28	GND	Signal and power ground reference - requires low-impedance connection to system ground plane.

Key Features

Feature	Design Value
Asynchronous Dual-Port Operation	Independent read/write clocks not required; eliminates clock domain crossing logic and simplifies interface design between mismatched subsystems.
Hardware Flow Control Flags	EF, FF, and HF signals provide immediate, cycle-accurate status without software intervention or timing-critical polling loops.
Retransmit Capability	RT input enables deterministic restart of read sequence from beginning - essential for protocol re-synchronization in communication bridges.
Expandable Architecture	Supports unlimited depth expansion (daisy-chain) and width expansion (parallel) using only standard control signals - scales buffer size without redesign.
Industrial Temperature Rating	Qualified from –40°C to +85°C in SOIC package - suitable for deployment in uncontrolled ambient environments like PLC backplanes and drive enclosures.

Applications

Industrial Data Acquisition	Motor Control Interface
Use Scenario: Buffering sensor data from multiple ADCs sampling at different rates into a centralized controller. IC Role / Device Role / Timing Role: Asynchronous FIFO decouples ADC sampling clock from controller processing clock, absorbing jitter and burst latency. Use Value: Prevents data loss during controller interrupt latency spikes; enables deterministic 4,096-word depth for worst-case burst capture.	Use Scenario: Isolating PWM command updates from motion controller to servo drives operating on separate timing domains. IC Role / Device Role / Timing Role: FIFO absorbs timing skew between command generation and execution clocks, ensuring monotonic command delivery. Use Value: Eliminates missed or duplicated commands due to clock phase misalignment; 9-bit width accommodates 8-bit command + 1-bit validity flag.
Legacy Bus Bridge	Real-Time Protocol Converter
Use Scenario: Interfacing an ISA-bus microcontroller (8 MHz) to a modern FPGA-based peripheral (50 MHz) with differing data throughput. IC Role / Device Role / Timing Role: Acts as rate-matching buffer between legacy and high-speed subsystems, handling asynchronous handshaking via EF/FF. Use Value: Enables drop-in replacement of aging controllers without redesigning timing-critical glue logic or adding complex clock-domain-crossing circuits.	Use Scenario: Converting Modbus RTU frames to CAN FD packets in industrial gateways where framing and timing differ significantly. IC Role / Device Role / Timing Role: Stores incoming serial frame bytes until complete, then releases them in parallel bursts to CAN controller - retransmit used for frame retry. Use Value: RT pin allows immediate re-read of last frame on CRC failure; 15 ns access ensures minimal delay in packet forwarding path.

Industrial Data Acquisition

Motor Control Interface

Use Scenario: Buffering sensor data from multiple ADCs sampling at different rates into a centralized controller.

IC Role / Device Role / Timing Role: Asynchronous FIFO decouples ADC sampling clock from controller processing clock, absorbing jitter and burst latency.

Use Value: Prevents data loss during controller interrupt latency spikes; enables deterministic 4,096-word depth for worst-case burst capture.

Use Scenario: Isolating PWM command updates from motion controller to servo drives operating on separate timing domains.

IC Role / Device Role / Timing Role: FIFO absorbs timing skew between command generation and execution clocks, ensuring monotonic command delivery.

Use Value: Eliminates missed or duplicated commands due to clock phase misalignment; 9-bit width accommodates 8-bit command + 1-bit validity flag.

Legacy Bus Bridge

Real-Time Protocol Converter

Use Scenario: Interfacing an ISA-bus microcontroller (8 MHz) to a modern FPGA-based peripheral (50 MHz) with differing data throughput.

IC Role / Device Role / Timing Role: Acts as rate-matching buffer between legacy and high-speed subsystems, handling asynchronous handshaking via EF/FF.

Use Value: Enables drop-in replacement of aging controllers without redesigning timing-critical glue logic or adding complex clock-domain-crossing circuits.

Use Scenario: Converting Modbus RTU frames to CAN FD packets in industrial gateways where framing and timing differ significantly.

IC Role / Device Role / Timing Role: Stores incoming serial frame bytes until complete, then releases them in parallel bursts to CAN controller - retransmit used for frame retry.

Use Value: RT pin allows immediate re-read of last frame on CRC failure; 15 ns access ensures minimal delay in packet forwarding path.

Equivalent & Alternatives

The following parts are listed as comparable options for similar FIFO memory applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74ACT7805N	2,048 × 9-bit, 15 ns access, commercial temp only (0°C to +70°C), PDIP-28 package	Lacks industrial temperature rating and retransmit function; no Half-Full flag	Select when cost-sensitive commercial designs require basic FIFO functionality without extended temp or advanced control features.
ICS7204AL15P	Same 4,096 × 9 organization and 15 ns speed, but plastic DIP-28, commercial temp only	No industrial qualification; incompatible pinout (DIP vs SOIC); lacks SOIC thermal/mechanical reliability	Choose only for prototyping or legacy through-hole boards where SOIC footprint is unavailable and industrial operation is not required.

Compared with SN74ACT7805N and ICS7204AL15P, the IDT7204L15SOGI uniquely delivers industrial temperature operation, retransmit capability, and Half-Full flag support in a surface-mount SOIC package - making it the sole option for robust, field-deployable buffering in automated equipment.

Availability

IDT7204L15SOGI is available at Aetrix Electronics and suitable for industrial data acquisition, motor control interface, and legacy bus bridge applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for IDT7204L15SOGI 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, designs high-performance timing, memory interface, and RF solutions for communications, computing, and industrial markets.

The IDT7204L15SOGI belongs to the IDT720x family of asynchronous FIFOs, engineered specifically for deterministic, low-latency data buffering in systems with asynchronous clock domains and strict real-time response requirements.

FAQ

What is the maximum operating frequency supported by the IDT7204L15SOGI?

The IDT7204L15SOGI does not operate on a clock signal - it is fully asynchronous. Its timing is governed by access time (t_A ≤ 15 ns) and cycle time parameters (e.g., t_RC ≥ 25 ns). Maximum effective throughput is determined by minimum read/write cycle times, enabling up to 40 MHz sustained data transfer under ideal conditions with proper setup/hold timing.

Does the IDT7204L15SOGI support daisy-chaining for deeper memory capacity?

Yes, the IDT7204L15SOGI supports depth expansion via its XI and XO pins. When configured in Depth Expansion Mode (XI tied to XO of previous device), multiple IDT7204L15SOGI units can be cascaded to create larger FIFO depths. Note that HF and RT functions are disabled in this mode, and composite EF/FF flags require external OR logic.

Can the IDT7204L15SOGI be used in a 3.3 V system?

No - the IDT7204L15SOGI is a 5 V-only device with V_CC specified from 4.5 V to 5.5 V. Its input thresholds (VIH = 2.0 V min) and output drive levels (VOH ≥ 2.4 V at –2 mA) are designed for 5 V TTL/CMOS compatibility. Direct interfacing with 3.3 V logic requires level-shifting circuitry.

What happens to the read pointer during a retransmit operation on the IDT7204L15SOGI?

During a retransmit operation (RT pulsed LOW), the read pointer is reset to the first memory location (address zero), while the write pointer remains unchanged. This allows repeated reading of the same data sequence without disturbing ongoing write operations - a feature confirmed in the functional description and truth tables of the IDT7204L15SOGI datasheet.

Is the IDT7204L15SOGI RoHS-compliant?

Yes - the "G" in the suffix "SOGI" denotes green (lead-free) packaging. The IDT7204L15SOGI uses SnAgCu (SAC) solder finish and complies with RoHS Directive 2011/65/EU. This is explicitly stated in the Ordering Information section of the datasheet under "Green parts available."

7204L15SOGI Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: 7200

Package/Case:: 28-SOIC (0.345", 8.77mm Width)

Packaging:: Tube

Product Status:: Active

Programmable:: Not Verified

Memory Size:: 36K (4K x 9)

Function:: Asynchronous

Data Rate:: 40MHz

Access Time:: 15ns

Voltage - Supply:: 4.5 V ~ 5.5 V

Current - Supply (Max):: 120mA

Bus Directional:: Uni-Directional

Expansion Type:: Depth, Width

Programmable Flags Support:: No

Retransmit Capability:: Yes

FWFT Support:: No

Operating Temperature:: -40°C ~ 85°C

Mounting Type:: Surface Mount

Supplier Device Package:: 28-SOIC

7204L15SOGI FAQ

1.How can I place an order for 7204L15SOGI through Aetrix?

Please submit a Request for Quotation (RFQ) for 7204L15SOGI 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 7204L15SOGI reliable?

The price and inventory of 7204L15SOGI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7204L15SOGI is usually 5 days.

3.What payment methods are accepted for 7204L15SOGI?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7204L15SOGI transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 7204L15SOGI?

7204L15SOGI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 7204L15SOGI 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 7204L15SOGI?

For technical support, including 7204L15SOGI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7204L15SOGI requirements.

6.How does Aetrix verify that 7204L15SOGI is sourced from the original manufacturer or authorized distributors?

All 7204L15SOGI 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 7204L15SOGI meets industry standards.

7.What is the process for return or replacement of 7204L15SOGI?

All 7204L15SOGI units undergo pre-shipment inspection (PSI). If there is an issue with 7204L15SOGI, 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 7204L15SOGI part is unused and in its original packaging.

Return procedure for 7204L15SOGI:

1.Submit a request within 90 days.

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

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