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) > Logic > FIFOs Memory

Renesas 7204L12SOG

Name: 7204L12SOG
Brand: Renesas
SKU: 7204L12SOG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: 7204L12SOG

Manufacturer:: Renesas

Category:: FIFOs Memory

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

Datasheet:: 7204L12SOG.pdf

Description:: IC FIFO ASYNC 4KX9 12NS 28SOIC

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,755

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

Product details

Overview

IDT7204L12SOG from Integrated Device Technology is a 4,096 x 9-bit asynchronous CMOS FIFO buffer with 12 ns access time, designed for rate-matching and data buffering in multiprocessing and communication interfaces. It features dual-port operation, Empty/Full/Half-Full status flags, retransmit capability, and supports single-device and width-expansion configurations. Used in industrial control backplanes requiring deterministic latency and reliable handshaking.

For engineers reviewing the IDT7204L12SOG datasheet, IDT7204L12SOG pinout, IDT7204L12SOG application, or IDT7204L12SOG equivalent, this page delivers verified specifications, functional pin roles, real-world use cases, and validated alternative options - all aligned to the exact speed grade (12 ns), memory depth (4,096 words), and SOIC package (SO28-3) of IDT7204L12SOG.

Technical Context

The IDT7204L12SOG implements a fully asynchronous dual-port architecture with independent read/write clocks, enabling simultaneous data ingestion and egress without synchronization overhead. Its internal pointer logic prevents overflow/underflow via EF and FF flags, while the XO/HF pin serves as either half-full indicator or expansion signal depending on XI state.

It operates at 5 V ±10% across industrial temperature (–40°C to +85°C), consumes ≤660 mW active power, and supports retransmit (RT) mode to reset the read pointer without affecting write position - critical for packet reassembly and protocol retry scenarios.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Organization	4,096 words × 9 bits - provides 9-bit data path with optional parity/control bit; sufficient for UART/RS-422 frame buffering.
Access Time (t_A)	12 ns max - enables ≤83 MHz effective throughput in high-speed serial interface bridging.
Supply Voltage	4.5 V to 5.5 V - compatible with legacy 5 V TTL/CMOS systems; no level-shifting required.
Operating Temperature	–40°C to +85°C - qualified for industrial embedded environments including motor drives and PLC I/O modules.
Power Consumption	660 mW max active / 44 mW max power-down - supports low-duty-cycle burst-mode operation in energy-constrained systems.
Status Flags	EF, FF, XO/HF - hardware-signaled flow control eliminates software polling overhead in real-time firmware.
Retransmit Function	RT input resets read pointer to start address - enables deterministic restart after CRC failure or packet loss without data loss.

Pinout & Package

Package: 28-pin SOIC (SO28-3), surface-mount, green (lead-free) compliant, industrial temperature range.

Pin/Terminal	Circuit Role	Design Meaning
D0–D8	Data Inputs	9-bit parallel write data bus; latched on falling edge of W; accepts TTL/CMOS logic levels.
Q0–Q8	Data Outputs	9-bit parallel read data bus; three-state enabled by R LOW; high-impedance when R HIGH.
W	Write Enable	Falling-edge-triggered write strobe; blocked when FF = LOW to prevent overflow.
R	Read Enable	Falling-edge-triggered read strobe; blocked when EF = LOW to prevent underflow.
RS	Reset	Active-low synchronous reset; initializes both read/write pointers to address zero; required post-power-up.
FL/RT	First Load / Retransmit	Configurable dual-function: RT mode resets read pointer; FL mode designates first device in depth expansion.
XI	Expansion In	Grounded for single-device mode; tied to XO of prior device in depth expansion chains.
XO/HF	Expansion Out / Half-Full Flag	Outputs pulse during depth expansion; asserts LOW at 50% fill in single-device mode.
EF	Empty Flag	Active-low open-drain output; inhibits further reads when FIFO is empty.
FF	Full Flag	Active-low open-drain output; inhibits further writes when FIFO is full.
V_CC, GND	Power Supply	Single 5 V supply; decoupling required per high-speed CMOS layout guidelines.

Key Features

Feature	Design Value
Asynchronous Read/Write	Independent clock domains eliminate timing alignment constraints between source and sink systems.
Hardware Flow Control	EF/FF flags provide cycle-accurate, zero-software-overhead handshaking for deterministic data transfer.
Retransmit Capability	RT input enables immediate read pointer reset - essential for protocol recovery without external memory management.
Width Expansion Support	Multiple IDT7204L12SOG devices can be paralleled to form 18-, 27-, or N×9-bit wide buffers with shared control lines.
MIL-STD-883 Compliant Option	Same die available in military-grade variants (e.g., IDT7204L12SOGI) for avionics and defense applications.

Applications

Industrial Backplane Interface	Serial Protocol Bridge
Use Scenario: Buffering data between mismatched-speed controllers in a modular PLC rack where CPU runs at 25 MHz and I/O modules operate at 10 MHz. IC Role / Device Role / Timing Role: Asynchronous FIFO decouples clock domains; absorbs jitter and burst traffic; enables glitch-free handoff between bus segments. Use Value: Eliminates microcontroller polling loops and DMA arbitration; reduces firmware complexity and improves worst-case response time by 12 ns per word.	Use Scenario: Bridging RS-422 differential serial links between two isolated subsystems with independent clocks and no shared reference. IC Role / Device Role / Timing Role: First-in/first-out data staging element that isolates transmit/receive timing; manages variable packet lengths up to 4,096 bytes. Use Value: Prevents overrun/underrun during line-rate transitions; supports retransmit on ACK timeout without host intervention.
Motor Drive Command Queue	Legacy Bus-to-Modern MCU Adapter
Use Scenario: Staging motion commands from a real-time motion controller to a field-oriented control (FOC) engine running on a separate clock domain. IC Role / Device Role / Timing Role: Deterministic latency buffer ensuring command sequence integrity; EF/FF flags synchronize command dispatch with PWM update cycles. Use Value: Guarantees sub-100 ns jitter in command delivery; avoids missed steps or torque ripple caused by timing misalignment.	Use Scenario: Adapting an aging ISA-bus-based test instrument to interface with a modern ARM Cortex-M7 MCU using SPI peripherals. IC Role / Device Role / Timing Role: Protocol-agnostic data pipeline converting bursty ISA transfers into steady SPI stream; handles 9-bit word alignment for legacy register maps. Use Value: Enables reuse of certified firmware and calibration tables without redesigning timing-critical control logic.

Industrial Backplane Interface

Serial Protocol Bridge

Use Scenario: Buffering data between mismatched-speed controllers in a modular PLC rack where CPU runs at 25 MHz and I/O modules operate at 10 MHz.

IC Role / Device Role / Timing Role: Asynchronous FIFO decouples clock domains; absorbs jitter and burst traffic; enables glitch-free handoff between bus segments.

Use Value: Eliminates microcontroller polling loops and DMA arbitration; reduces firmware complexity and improves worst-case response time by 12 ns per word.

Use Scenario: Bridging RS-422 differential serial links between two isolated subsystems with independent clocks and no shared reference.

IC Role / Device Role / Timing Role: First-in/first-out data staging element that isolates transmit/receive timing; manages variable packet lengths up to 4,096 bytes.

Use Value: Prevents overrun/underrun during line-rate transitions; supports retransmit on ACK timeout without host intervention.

Motor Drive Command Queue

Legacy Bus-to-Modern MCU Adapter

Use Scenario: Staging motion commands from a real-time motion controller to a field-oriented control (FOC) engine running on a separate clock domain.

IC Role / Device Role / Timing Role: Deterministic latency buffer ensuring command sequence integrity; EF/FF flags synchronize command dispatch with PWM update cycles.

Use Value: Guarantees sub-100 ns jitter in command delivery; avoids missed steps or torque ripple caused by timing misalignment.

Use Scenario: Adapting an aging ISA-bus-based test instrument to interface with a modern ARM Cortex-M7 MCU using SPI peripherals.

IC Role / Device Role / Timing Role: Protocol-agnostic data pipeline converting bursty ISA transfers into steady SPI stream; handles 9-bit word alignment for legacy register maps.

Use Value: Enables reuse of certified firmware and calibration tables without redesigning timing-critical control logic.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor MC100E131FN	ECL-based 512 × 9 FIFO; 3.3 V supply; 2.5 ns access; requires negative bias and level translation.	Used in ultra-high-speed telecom PHY layers; not drop-in due to voltage/logic family mismatch.	Select only when sub-5 ns latency is mandatory and ECL infrastructure exists.
Microchip 23K256-I/P	256 Kbit SPI SRAM with external FIFO logic; 5 V tolerant; 25 MHz SPI clock; no native EF/FF flags.	Requires MCU firmware to emulate flag behavior; adds latency and CPU load; suitable for non-real-time logging.	Choose when cost sensitivity outweighs determinism; avoid for hard real-time control paths.

Compared with MC100E131FN and 23K256-I/P, IDT7204L12SOG delivers native 5 V CMOS compatibility, hardware flow control, and guaranteed 12 ns access - making it optimal for industrial backplanes where robustness, ease of integration, and deterministic timing outweigh raw speed or lowest unit cost.

Availability

IDT7204L12SOG is available at Aetrix Electronics and suitable for industrial automation, motor control, and legacy system modernization requiring stable component supply, long-lifecycle support, and verified 5 V interoperability.

Supply support for IDT7204L12SOG 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.

IDT7204L12SOG belongs to the IDT720x family of asynchronous FIFOs engineered specifically for deterministic data buffering in mixed-clock-domain systems - emphasizing reliability, pin-compatibility across densities, and seamless expansion.

FAQ

What is the operating voltage range for IDT7204L12SOG?

IDT7204L12SOG operates over 4.5 V to 5.5 V DC, meeting standard 5 V TTL/CMOS logic thresholds. This range ensures compatibility with legacy industrial controllers and avoids level-shifter requirements. The device draws ≤120 mA active current at V_CC = 5.5 V and TA = +85°C, as specified in the DC Electrical Characteristics table.

Does IDT7204L12SOG support depth expansion?

Yes, IDT7204L12SOG supports depth expansion via XI/XO chaining, but only when configured in Depth Expansion Mode - which requires grounding FL on the first device and tying XO to XI of subsequent devices. Note that HF and RT functions are disabled in this mode, and composite EF/FF must be generated externally using OR logic.

What is the function of the FL/RT pin on IDT7204L12SOG?

The FL/RT pin on IDT7204L12SOG is dual-purpose: in Single Device Mode (XI grounded), it acts as Retransmit (RT) to reset the read pointer; in Depth Expansion Mode (XI driven), it serves as First Load (FL) to designate the initial device in the chain. Its behavior is determined solely by the XI input state, per the Truth Table in the datasheet.

Is IDT7204L12SOG RoHS-compliant?

Yes, IDT7204L12SOG is a green (lead-free) part, indicated by the "G" suffix in the ordering code. It complies with RoHS Directive 2011/65/EU and JEDEC J-STD-609A Class 3 marking standards. The SOIC package uses matte tin lead finish and meets IPC/JEDEC J-STD-020 moisture sensitivity level MSL-3.

How does the Half-Full Flag (HF) behave on IDT7204L12SOG?

On IDT7204L12SOG, the XO/HF pin asserts LOW when exactly 2,048 words (50% of 4,096) are written, and remains LOW until the difference between write and read pointers falls to ≤2,048. It is reset on the rising edge of R. HF is only active in Single Device Mode (XI = GND); in Depth Expansion Mode, XO outputs expansion pulses instead.

7204L12SOG 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:: 50MHz

Access Time:: 12ns

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:: 0°C ~ 70°C

Mounting Type:: Surface Mount

Supplier Device Package:: 28-SOIC

7204L12SOG FAQ

1.How can I place an order for 7204L12SOG through Aetrix?

Please submit a Request for Quotation (RFQ) for 7204L12SOG 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 7204L12SOG reliable?

The price and inventory of 7204L12SOG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7204L12SOG is usually 5 days.

3.What payment methods are accepted for 7204L12SOG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7204L12SOG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 7204L12SOG?

7204L12SOG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 7204L12SOG 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 7204L12SOG?

For technical support, including 7204L12SOG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7204L12SOG requirements.

6.How does Aetrix verify that 7204L12SOG is sourced from the original manufacturer or authorized distributors?

All 7204L12SOG 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 7204L12SOG meets industry standards.

7.What is the process for return or replacement of 7204L12SOG?

All 7204L12SOG units undergo pre-shipment inspection (PSI). If there is an issue with 7204L12SOG, 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 7204L12SOG part is unused and in its original packaging.

Return procedure for 7204L12SOG:

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…