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

Renesas IDT723611L15PF

Name: IDT723611L15PF
Brand: Renesas
SKU: IDT723611L15PF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IDT723611L15PF

Manufacturer:: Renesas

Category:: FIFOs Memory

Package:: 120-LQFP

Datasheet:: IDT723611L15PF.pdf

Description:: IC FIFO SYNC 64X36 10NS 120TQFP

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Product details

Overview

IDT723611L15PF from Integrated Device Technology is a 64 × 36-bit synchronous dual-port FIFO memory IC with independent clock domains (CLKA/CLKB), supporting up to 66.7 MHz operation and 10 ns access time. It implements mailbox bypass registers, programmable Almost-Empty/Almost-Full flags, and passive parity checking on both 36-bit ports - used in high-speed data buffering between asynchronous microprocessor buses or DSP-to-ASIC interfaces.

For engineers reviewing the IDT723611L15PF datasheet, IDT723611L15PF pinout, IDT723611L15PF application, or IDT723611L15PF equivalent, key selection criteria include dual-clock synchronization latency, mailbox flag timing (MBF1/MBF2 propagation ≤9 ns), 120-pin TQFP package compatibility, and industrial-grade temperature support (–40°C to +85°C) confirmed for this speed grade.

Technical Context

The IDT723611L15PF employs a fully synchronous dual-port architecture where CLKA governs write operations and CLKB governs reads, with FF/AF flags synchronized to CLKA and EF/AE flags synchronized to CLKB via two-stage flip-flop staging to suppress metastability. Its internal 64 × 36 SRAM array supports concurrent read/write on a single clock edge when clocks are coincident.

Flag offset programming uses FS0/FS1 inputs latched on RST rising edge to select preset values (4, 8, 12, or 16) for Almost-Empty/Almost-Full thresholds. Mailbox registers (mail1/mail2) operate independently of FIFO storage and feature dedicated flags (MBF1/MBF2) with defined reset behavior and write-inhibit logic.

Key Specifications

Parameter	Value and Actual Design Meaning
Storage Capacity	64 × 36-bit words - provides 2,304-bit buffer depth for burst-mode data alignment between mismatched clock domains.
Max Clock Frequency	66.7 MHz - enables real-time streaming at 2.4 Gbps aggregate throughput across both ports.
Access Time	10 ns - guarantees deterministic read latency from CLKB↑ to valid B0–B35 output under 30 pF load.
Operating Temperature	–40°C to +85°C - qualified for industrial environments without derating; matches IDT723611L15PF's specified industrial temp grade.
Supply Voltage	4.5 V to 5.5 V - compatible with standard 5 V TTL/CMOS logic families and tolerant of ±10% rail variation.
Package	120-pin Thin Quad Flatpack (TQFP, PF code) - surface-mount footprint with 0.4 mm pitch, optimized for high-density PCB layouts.
Parity Support	Configurable odd/even parity per port with dedicated PEFA/PEFB flags - enables error detection in mission-critical communication links.

Pinout & Package

Package: 120-pin Thin Quad Flatpack (TQFP), order code PF, body size 14 mm × 14 mm, 0.4 mm lead pitch.

Pin/Terminal	Circuit Role	Design Meaning
A0–A35	Port-A bidirectional data bus	36-bit interface for writes to or reads from FIFO/mail2; high-impedance when CSA or W/RA HIGH.
B0–B35	Port-B bidirectional data bus	36-bit interface for writes to or reads from FIFO/mail1; high-impedance when CSB or W/RB HIGH.
CLKA / CLKB	Independent port clocks	Asynchronous or coincident clocks; all transfers gated to LOW-to-HIGH transition; FF/AF sync to CLKA, EF/AE sync to CLKB.
CSA / CSB	Port chip select inputs	Active-LOW enables port control logic; disables A0–A35/B0–B35 outputs when HIGH.
W/RA / W/RB	Port write/read select	Active-HIGH = write, LOW = read; controls direction of data flow on respective port.
MBA / MBB	Mailbox select inputs	HIGH selects mail2 (port A) or mail1 (port B); enables mailbox register access instead of FIFO.
AF / AE / FF / EF	Synchronized status flags	Open-drain outputs indicating FIFO fill level; AF/FF sync to CLKA, AE/EF sync to CLKB with two-stage metastability hardening.
RST	Asynchronous reset input	Requires four CLKA↑ and four CLKB↑ transitions while LOW to initialize pointers and flags; latches FS0/FS1 on rising edge.

Key Features

Feature	Design Value
Dual independent clock domains	Enables seamless bridging between systems operating at different frequencies (e.g., 66.7 MHz processor ↔ 50 MHz peripheral) without external handshaking logic.
Programmable Almost-Full/Almost-Empty flags	Four preset offset values (4/8/12/16 words) selected via FS0/FS1 allow precise buffer-level interrupt generation to prevent overflow/underflow in real-time pipelines.
Dedicated mailbox registers	Two 36-bit bypass registers (mail1/mail2) with MBF1/MBF2 flags enable low-latency command/control exchange alongside bulk FIFO data transfer - critical for protocol handshaking.
Passive parity checking & generation	Per-port parity (odd/even selectable via ODD/EVEN pin) with dedicated PEFA/PEFB flags and optional parity bit insertion on reads - supports IEC 61508-compliant safety architectures.
Industrial temperature qualification	Specified and tested over –40°C to +85°C at 10 ns access time - eliminates need for thermal derating in harsh-environment embedded designs.

Applications

Telecom Line Card Buffering	Industrial PLC Data Aggregation
Use Scenario: Bridging TDM backplane traffic between ASIC-based framer and FPGA-based packet processor with mismatched clock domains. IC Role / Device Role / Timing Role: Synchronous FIFO buffer with CLKA = 66.7 MHz (framer clock), CLKB = 50 MHz (FPGA clock), using AF/EF flags for DMA trigger management. Use Value: Eliminates external glue logic by providing native dual-clock handshake-free buffering; 10 ns access ensures sub-cycle latency for jitter-sensitive voice channels.	Use Scenario: Consolidating sensor data streams from multiple CAN nodes into a central ARM Cortex-M7 controller running RTOS. IC Role / Device Role / Timing Role: High-reliability data staging element where mail1 register handles configuration commands from host CPU and FIFO buffers analog acquisition bursts. Use Value: Mailbox flags (MBF1/MBF2) provide atomic command acknowledgment; parity checking meets SIL-2 functional safety requirements for industrial automation.
Medical Imaging Data Pipeline	Avionics Sensor Interface
Use Scenario: Transferring raw pixel data from high-speed CMOS image sensor (80 MSPS) to DDR3 memory controller (133 MHz) in ultrasound equipment. IC Role / Device Role / Timing Role: Clock domain crossing FIFO with CLKA = 80 MHz (sensor clock), CLKB = 133 MHz (memory controller clock), using AE flag to throttle sensor exposure timing. Use Value: 64-word depth prevents frame loss during memory arbitration stalls; 120-pin TQFP allows compact placement near sensor interface traces.	Use Scenario: Interfacing ARINC 429 transceivers to a radiation-hardened PowerPC processor in flight control computers. IC Role / Device Role / Timing Role: Deterministic latency buffer where CLKA synchronizes to ARINC TX clock (100 kHz), CLKB to processor bus (66 MHz), and mailbox registers handle discrete status updates. Use Value: Two-stage flag synchronization ensures reliable flag assertion under EMI stress; industrial temp rating supports extended operation in uncooled avionics bays.

Telecom Line Card Buffering

Industrial PLC Data Aggregation

Use Scenario: Bridging TDM backplane traffic between ASIC-based framer and FPGA-based packet processor with mismatched clock domains.

IC Role / Device Role / Timing Role: Synchronous FIFO buffer with CLKA = 66.7 MHz (framer clock), CLKB = 50 MHz (FPGA clock), using AF/EF flags for DMA trigger management.

Use Value: Eliminates external glue logic by providing native dual-clock handshake-free buffering; 10 ns access ensures sub-cycle latency for jitter-sensitive voice channels.

Use Scenario: Consolidating sensor data streams from multiple CAN nodes into a central ARM Cortex-M7 controller running RTOS.

IC Role / Device Role / Timing Role: High-reliability data staging element where mail1 register handles configuration commands from host CPU and FIFO buffers analog acquisition bursts.

Use Value: Mailbox flags (MBF1/MBF2) provide atomic command acknowledgment; parity checking meets SIL-2 functional safety requirements for industrial automation.

Medical Imaging Data Pipeline

Avionics Sensor Interface

Use Scenario: Transferring raw pixel data from high-speed CMOS image sensor (80 MSPS) to DDR3 memory controller (133 MHz) in ultrasound equipment.

IC Role / Device Role / Timing Role: Clock domain crossing FIFO with CLKA = 80 MHz (sensor clock), CLKB = 133 MHz (memory controller clock), using AE flag to throttle sensor exposure timing.

Use Value: 64-word depth prevents frame loss during memory arbitration stalls; 120-pin TQFP allows compact placement near sensor interface traces.

Use Scenario: Interfacing ARINC 429 transceivers to a radiation-hardened PowerPC processor in flight control computers.

IC Role / Device Role / Timing Role: Deterministic latency buffer where CLKA synchronizes to ARINC TX clock (100 kHz), CLKB to processor bus (66 MHz), and mailbox registers handle discrete status updates.

Use Value: Two-stage flag synchronization ensures reliable flag assertion under EMI stress; industrial temp rating supports extended operation in uncooled avionics bays.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor NB3N502DG	Single-clock 256 × 18 FIFO; no mailbox registers; max 133 MHz; 8-bit parallel interface only.	Lacks dual-clock domain support and 36-bit width - unsuitable for direct replacement in IDT723611L15PF's asymmetric bus bridging role.	Select only for cost-sensitive, single-clock, narrower-data applications where mailbox functionality is unnecessary.
Renesas 72V2113L15PF	Same 64 × 36 capacity and 120-pin TQFP package; identical 10 ns access time; supports same industrial temp range.	Pin-compatible with IDT723611L15PF but requires updated timing constraints for RST hold time (6 ns vs 5 ns) and CLKB skew tolerance.	Drop-in replacement for new designs; verify reset timing margin in existing layouts due to tighter tRSTH requirement.

Compared with NB3N502DG and 72V2113L15PF, the IDT723611L15PF uniquely delivers dual independent clock domains with mailbox registers and programmable flag offsets - making it irreplaceable in applications requiring concurrent command/data channel separation and precise buffer-level interrupt control.

Availability

IDT723611L15PF is available at Aetrix Electronics and suitable for telecom line card buffering, industrial PLC data aggregation, medical imaging pipelines, and avionics sensor interfaces requiring stable component supply across extended product lifecycles.

Supply support for IDT723611L15PF 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 timing, memory interface, and high-performance interconnect solutions for communications, computing, and industrial markets.

The IDT723611L15PF belongs to IDT's SyncFIFO™ family - designed specifically for deterministic, low-latency clock-domain crossing in real-time embedded systems where data coherency and flag reliability are critical.

FAQ

What is the maximum supported clock frequency for IDT723611L15PF?

IDT723611L15PF supports up to 66.7 MHz on both CLKA and CLKB inputs under commercial conditions (0°C to +70°C) and is rated for 66.7 MHz operation across its full industrial temperature range (–40°C to +85°C), as confirmed in the timing specifications table for the L15 speed grade.

Does IDT723611L15PF support programmable Almost-Empty and Almost-Full thresholds?

Yes, IDT723611L15PF supports programmable Almost-Empty (AE) and Almost-Full (AF) thresholds via the FS0 and FS1 pins, which load preset offset values (4, 8, 12, or 16 words) into an internal register on the rising edge of RST - enabling precise buffer-level interrupt triggering without external logic.

How does the mailbox functionality work in IDT723611L15PF?

IDT723611L15PF includes two independent 36-bit mailbox registers: mail1 (accessible via port B) and mail2 (accessible via port A). MBA and MBB select mailbox mode; MBF1 and MBF2 flags signal write completion and inhibit further writes until read - enabling atomic command exchange alongside FIFO data flow.

What package type is used for IDT723611L15PF?

IDT723611L15PF is packaged in a 120-pin Thin Quad Flatpack (TQFP) with order code PF, measuring 14 mm × 14 mm with 0.4 mm lead pitch - a space-efficient, surface-mount solution qualified for industrial reflow profiles and high-density PCB routing.

Is IDT723611L15PF qualified for industrial temperature operation?

Yes, IDT723611L15PF is explicitly characterized and guaranteed for operation from –40°C to +85°C, as stated in the device description and confirmed in the Recommended Operating Conditions table - making it suitable for deployment in harsh industrial, automotive under-hood, and outdoor telecommunications environments.

IDT723611L15PF Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: 7200

Package/Case:: 120-LQFP

Packaging:: Tube

Product Status:: Obsolete

Programmable:: Not Verified

Memory Size:: 2.25K (64 x 36)

Function:: Synchronous

Data Rate:: 66.7MHz

Access Time:: 10ns

Voltage - Supply:: 4.5 V ~ 5.5 V

Current - Supply (Max):: 130mA

Bus Directional:: Bi-Directional

Expansion Type:: Width

Programmable Flags Support:: Yes

Retransmit Capability:: No

FWFT Support:: No

Operating Temperature:: 0°C ~ 70°C

Mounting Type:: Surface Mount

Supplier Device Package:: 120-TQFP (14x14)

IDT723611L15PF FAQ

1.How can I place an order for IDT723611L15PF through Aetrix?

Please submit a Request for Quotation (RFQ) for IDT723611L15PF 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 IDT723611L15PF reliable?

The price and inventory of IDT723611L15PF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IDT723611L15PF is usually 5 days.

3.What payment methods are accepted for IDT723611L15PF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IDT723611L15PF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IDT723611L15PF?

IDT723611L15PF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IDT723611L15PF 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 IDT723611L15PF?

For technical support, including IDT723611L15PF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IDT723611L15PF requirements.

6.How does Aetrix verify that IDT723611L15PF is sourced from the original manufacturer or authorized distributors?

All IDT723611L15PF 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 IDT723611L15PF meets industry standards.

7.What is the process for return or replacement of IDT723611L15PF?

All IDT723611L15PF units undergo pre-shipment inspection (PSI). If there is an issue with IDT723611L15PF, 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 IDT723611L15PF part is unused and in its original packaging.

Return procedure for IDT723611L15PF:

1.Submit a request within 90 days.

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

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