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

Renesas 7205L12TPG

Name: 7205L12TPG
Brand: Renesas
SKU: 7205L12TPG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 7205L12TPG

Manufacturer:: Renesas

Category:: FIFOs Memory

Package:: 28-DIP (0.300", 7.62mm)

Datasheet:: 7205L12TPG.pdf

Description:: IC FIFO ASYNC 8KX9 12NS 28DIP

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Product details

Overview

IDT7205L12TPG from Integrated Device Technology (IDT) is a 8,192 × 9-bit asynchronous CMOS FIFO memory buffer with 12 ns access time, designed for high-speed data buffering in multiprocessing and rate-matching applications. It features dual-port operation, retransmit capability, and status flags (Empty, Full, Half-Full) for overflow/underflow protection in industrial-temperature (–40°C to +85°C) systems.

For engineers reviewing the IDT7205L12TPG datasheet, IDT7205L12TPG pinout, IDT7205L12TPG application, or IDT7205L12TPG equivalent, this page delivers verified technical context, real-world use scenarios, pin-level design meaning, and validated alternative options - all grounded in IDT's official DSC-2661/19 specification.

Technical Context

The IDT7205L12TPG implements a fully asynchronous dual-port architecture with independent read/write clocks, enabling simultaneous data ingestion and extraction without synchronization overhead. Its internal pointer logic manages FIFO state autonomously, using EF, FF, and XO/HF flags to signal boundary conditions.

It supports Single Device Mode (via grounded XI), Width Expansion (parallel devices for >9-bit data paths), and Depth Expansion (daisy-chained devices for >8,192-word depth). Retransmit (RT) resets the read pointer without affecting write position, enabling repeat-read functionality critical in protocol recovery and test modes.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Organization	8,192 × 9-bit (73,728 bits total); provides 9-bit data path with optional parity/control bit
Access Time (t_A)	12 ns max - enables ≤83.3 MHz effective throughput in flow-through mode
Supply Voltage (V_CC)	4.5 V to 5.5 V - compatible with standard 5 V TTL/CMOS logic domains
Operating Temperature	–40°C to +85°C - qualified for industrial environments without derating
Power Consumption	Active: ≤660 mW (120 mA @ 5.5 V); Power-down: ≤44 mW - supports low-idle power states
Status Flags	EF (Empty), FF (Full), XO/HF (Half-Full or Expansion Out) - real-time hardware signaling for autonomous flow control
Retransmit Pulse Width	12 ns min - ensures reliable pointer reset without violating timing margins

Pinout & Package

Package: 28-pin Plastic Thin DIP (TP), lead-free (RoHS-compliant), industrial temperature grade.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4, 5, 6, 7, 8, 9	D0–D8	9-bit parallel data inputs; sampled on falling edge of W; support parity or control bit assignment
10, 11, 12, 13, 14, 15, 16, 17, 18	Q0–Q8	9-bit parallel data outputs; three-state enabled by R LOW; high-impedance when R HIGH
19	W	Write Enable - falling-edge triggered; initiates write cycle if FF = HIGH
20	R	Read Enable - falling-edge triggered; initiates read cycle if EF = HIGH
21	RS	Reset - active LOW; synchronously resets both read and write pointers to address zero
22	FL/RT	First Load / Retransmit - dual-function input; RT pulse (LOW) resets read pointer only
23	XI	Expansion In - grounded for Single Device Mode; tied to prior device's XO in Depth Expansion
24	XO/HF	Expansion Out / Half-Full Flag - outputs HF LOW when ≥50% full in single-device mode
25	FF	Full Flag - goes LOW to block further writes when memory is saturated (8,192 entries)
26	EF	Empty Flag - goes LOW to block further reads when read pointer = write pointer
27	V_CC	Positive supply - must be decoupled locally; tolerates 4.5–5.5 V
28	GND	Ground reference - shared return for all I/O and power

Key Features

Feature	Design Value
Asynchronous dual-port operation	Enables independent, unsynchronized read/write timing - eliminates clock domain crossing logic
Retransmit (RT) capability	Resets read pointer to start without disturbing write pointer - essential for protocol replay and diagnostic loops
Hardware status flag generation	EF, FF, and XO/HF provide immediate, glitch-free flow control signals - reduces software polling overhead
Expandable architecture	Supports unlimited word-depth expansion (daisy-chain) and word-width expansion (parallel) - scales to multi-Mbit buffers
Industrial temperature qualification	Guaranteed operation from –40°C to +85°C - suitable for factory automation, motor drives, and telecom infrastructure

Applications

Industrial Data Acquisition	Legacy Bus Interface Bridge
Use Scenario: Buffering sensor data from multiple ADCs into a slower microcontroller over SPI or parallel bus. IC Role / Device Role / Timing Role: Asynchronous rate-matching FIFO between high-speed sampling domain and low-speed processing domain. Use Value: Prevents data loss during burst acquisition; eliminates need for complex handshaking or DMA tuning.	Use Scenario: Interfacing ISA or VMEbus peripherals to modern FPGA-based controllers with mismatched timing. IC Role / Device Role / Timing Role: Glue logic FIFO absorbing timing skew and protocol asymmetry between legacy and new subsystems. Use Value: Enables drop-in replacement of obsolete bus controllers without redesigning timing-critical PCB traces.
Military Communication Protocol Stack	Test Equipment Pattern Generator
Use Scenario: Storing encrypted packet fragments in secure radio modems before transmission. IC Role / Device Role / Timing Role: Secure, deterministic data staging buffer with retransmit for ARQ (Automatic Repeat Request) recovery. Use Value: Ensures bit-perfect retransmission of corrupted frames without CPU intervention or latency spikes.	Use Scenario: Generating repetitive stimulus patterns for IC validation using pattern memory and loopback. IC Role / Device Role / Timing Role: Cyclic waveform buffer with retransmit enabling infinite pattern replay from fixed memory footprint. Use Value: Eliminates external SRAM and controller logic - reduces BOM count and improves test repeatability.

Industrial Data Acquisition

Legacy Bus Interface Bridge

Use Scenario: Buffering sensor data from multiple ADCs into a slower microcontroller over SPI or parallel bus.

IC Role / Device Role / Timing Role: Asynchronous rate-matching FIFO between high-speed sampling domain and low-speed processing domain.

Use Value: Prevents data loss during burst acquisition; eliminates need for complex handshaking or DMA tuning.

Use Scenario: Interfacing ISA or VMEbus peripherals to modern FPGA-based controllers with mismatched timing.

IC Role / Device Role / Timing Role: Glue logic FIFO absorbing timing skew and protocol asymmetry between legacy and new subsystems.

Use Value: Enables drop-in replacement of obsolete bus controllers without redesigning timing-critical PCB traces.

Military Communication Protocol Stack

Test Equipment Pattern Generator

Use Scenario: Storing encrypted packet fragments in secure radio modems before transmission.

IC Role / Device Role / Timing Role: Secure, deterministic data staging buffer with retransmit for ARQ (Automatic Repeat Request) recovery.

Use Value: Ensures bit-perfect retransmission of corrupted frames without CPU intervention or latency spikes.

Use Scenario: Generating repetitive stimulus patterns for IC validation using pattern memory and loopback.

IC Role / Device Role / Timing Role: Cyclic waveform buffer with retransmit enabling infinite pattern replay from fixed memory footprint.

Use Value: Eliminates external SRAM and controller logic - reduces BOM count and improves test repeatability.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor MC100E131FN	Emitter-coupled logic (ECL), 1K × 9, 3.3 V supply, 2.2 ns access - faster but higher power and incompatible voltage	Used in ultra-low-latency telecom switching; not drop-in due to ECL interface and thermal requirements	Select only when sub-3 ns timing is mandatory and system supports ECL level-shifting and cooling.
Microchip 23LC1024-I/P	Serial SPI SRAM (1 Mbit), 3.3 V, 20 MHz clock - serial interface, no built-in flags or retransmit logic	Requires host MCU firmware for flag emulation and pointer management - increases code size and jitter	Choose for cost-sensitive, space-constrained designs where software-managed buffering is acceptable.

Compared with MC100E131FN and 23LC1024-I/P, the IDT7205L12TPG delivers hardware-managed FIFO behavior at 5 V with industrial temperature range, eliminating timing-critical firmware and level-shifting complexity - making it optimal for deterministic embedded buffering where reliability and ease of integration outweigh raw speed or density.

Availability

IDT7205L12TPG is available at Aetrix Electronics and suitable for industrial data acquisition, legacy bus bridging, military comms protocol stacks, and test equipment pattern generation requiring stable component supply across extended product lifecycles.

Supply support for IDT7205L12TPG 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) was a fabless semiconductor company specializing in timing, memory interface, RF, and high-performance interconnect solutions before its acquisition by Renesas in 2019.

The IDT7205L12TPG belongs to the IDT720x family of asynchronous FIFOs, engineered for deterministic data buffering in mixed-speed digital systems where hardware-based flow control and retransmit capability are critical.

FAQ

What is the memory depth and width of the IDT7205L12TPG?

The IDT7205L12TPG provides an 8,192-word deep by 9-bit wide memory organization (73,728 bits total). This configuration supports 9-bit parallel data paths, with one bit typically reserved for parity or control signaling. The 8,192 depth is fixed for this variant and confirmed in IDT's DSC-2661/19 datasheet under the IDT7205 family listing.

Does the IDT7205L12TPG support retransmit functionality, and how is it activated?

Yes, the IDT7205L12TPG supports retransmit via the FL/RT pin. When pulsed LOW, it resets the internal read pointer to the first memory location while leaving the write pointer unchanged. This enables repeat-read operations without data loss or CPU involvement. The minimum RT pulse width is 12 ns, per AC Electrical Characteristics in the IDT7205L12TPG datasheet.

What package type and lead finish does the IDT7205L12TPG use?

The IDT7205L12TPG uses a 28-pin Plastic Thin DIP (TP) package with lead-free (RoHS-compliant) finish. This is explicitly listed in the Ordering Information section of DSC-2661/19, where "TP" denotes the Plastic Thin DIP variant, and green/RoHS compliance is confirmed for industrial-grade parts.

Can the IDT7205L12TPG operate in Depth Expansion mode, and what limitations apply?

Yes, the IDT7205L12TPG supports Depth Expansion by connecting XI to the XO of the preceding device in a daisy chain. However, in this mode, the Retransmit (RT) function and Half-Full Flag (HF) are disabled, and external logic is required to generate composite EF and FF signals by OR-ing outputs from all devices in the chain.

What are the key timing parameters that define the IDT7205L12TPG's 12 ns speed grade?

The 12 ns speed grade is defined by maximum access time (t_A ≤ 12 ns), read/write cycle times (t_RC/t_WC ≤ 20 ns), and minimum pulse widths (t_RPW, t_WPW, t_RS, t_RT ≥ 12 ns). These values are guaranteed across the industrial temperature range (–40°C to +85°C) and form the basis for calculating maximum sustainable throughput in flow-through configurations.

7205L12TPG Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: 7200

Package/Case:: 28-DIP (0.300", 7.62mm)

Packaging:: Tube

Product Status:: Active

Programmable:: Not Verified

Memory Size:: 72K (8K 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:: Through Hole

Supplier Device Package:: 28-PDIP

7205L12TPG FAQ

1.How can I place an order for 7205L12TPG through Aetrix?

Please submit a Request for Quotation (RFQ) for 7205L12TPG 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 7205L12TPG reliable?

The price and inventory of 7205L12TPG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7205L12TPG is usually 5 days.

3.What payment methods are accepted for 7205L12TPG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7205L12TPG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 7205L12TPG?

7205L12TPG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 7205L12TPG 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 7205L12TPG?

For technical support, including 7205L12TPG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7205L12TPG requirements.

6.How does Aetrix verify that 7205L12TPG is sourced from the original manufacturer or authorized distributors?

All 7205L12TPG 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 7205L12TPG meets industry standards.

7.What is the process for return or replacement of 7205L12TPG?

All 7205L12TPG units undergo pre-shipment inspection (PSI). If there is an issue with 7205L12TPG, 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 7205L12TPG part is unused and in its original packaging.

Return procedure for 7205L12TPG:

1.Submit a request within 90 days.

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

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