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Renesas IDT7204L25SO
- Part No.:
- IDT7204L25SO
- Manufacturer:
- Renesas
- Category:
- FIFOs Memory
- Package:
- 28-SOIC (0.345", 8.77mm Width)
- Datasheet:
-
IDT7204L25SO.pdf
- Description:
- IC FIFO ASYNC 4KX9 25NS 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,312
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Product details
Overview
IDT7204L25SO from Integrated Device Technology is a 4,096 x 9-bit asynchronous FIFO memory IC designed for rate buffering and data flow synchronization between mismatched clock domains or bus protocols. It features 12ns access time, 25ns cycle timing, dual-port operation with independent read/write control, and status flags (Empty, Full, Half-Full) for overflow/underflow protection. Used in industrial communication gateways requiring deterministic latency and reliable handshaking.
For engineers reviewing the IDT7204L25SO datasheet, IDT7204L25SO pinout, IDT7204L25SO application, or IDT7204L25SO equivalent, key selection criteria include its 4Kx9 depth, SOIC-28 package, 5V supply compatibility, retransmit capability, and support for width/depth expansion in embedded data acquisition systems.
Technical Context
The IDT7204L25SO implements a fully asynchronous dual-port architecture with independent write and read pointers managed by internal logic. Its 9-bit data path supports parity or control bit insertion, and the Retransmit (RT) function resets the read pointer without affecting the write pointer - enabling repeat-read sequences after partial fills.
Status flag generation (EF, FF, XO/HF) is synchronous to respective control edges (R/W), with propagation delays specified down to 12ns. The device operates in Single Device Mode when Expansion In (XI) is grounded, and supports width expansion (bit-width scaling) and depth expansion (word-depth scaling) via daisy-chained XI/XO signals - though RT and HF are disabled in depth expansion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Depth × Width | 4,096 × 9 bits - provides 4K-word buffer capacity with dedicated parity/control bit lane. |
| Access Time (tA) | 25 ns max - defines minimum delay from address/strobe assertion to valid output data. |
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5V TTL/CMOS logic families and legacy 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), Power-down: ≤2 mA (10 mW) - enables low-idle-power system states without full shutdown. |
| Flag Outputs | EF (Empty), FF (Full), XO/HF (Half-Full or Expansion Out) - real-time status signaling for hardware handshaking without CPU polling. |
| Retransmit Pulse Width | 20 ns min - ensures reliable read-pointer reset during high-speed burst reads in test instrumentation applications. |
Pinout & Package
Package: SOIC-28 (SO28-3), surface-mount, 300-mil body width, standard JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D0–D8 | Data Input Bus | 9-bit parallel input path; accepts data on falling edge of W; supports parity or control bit assignment. |
| Q0–Q8 | Data Output Bus | Three-state outputs enabled only when R = LOW; high-impedance otherwise to prevent bus contention. |
| W | Write Enable | Falling-edge triggered; initiates write cycle if FF = HIGH; blocks writes when FIFO is full. |
| R | Read Enable | Falling-edge triggered; initiates read cycle if EF = HIGH; outputs go Hi-Z when R goes HIGH. |
| RS | Reset | Active-LOW; synchronously resets both read and write pointers to location zero; required before first write. |
| FL/RT | First Load / Retransmit | Dual-function: LOW = retransmit (read pointer → start); HIGH = normal operation; disabled in depth expansion. |
| XI | Expansion In | GND = single-device mode; tied to XO of prior device in depth expansion chain. |
| XO/HF | Expansion Out / Half-Full Flag | In single mode: HF asserts LOW at 50% fill; in depth mode: pulses on last write/read to cascade to next device. |
| EF | Empty Flag | Open-drain, active-LOW; inhibits further reads when read pointer = write pointer. |
| FF | Full Flag | Open-drain, active-LOW; inhibits further writes when FIFO contains 4,096 words. |
| VCC, GND | Power Supply | Single 5V supply; decoupling required per high-speed CMOS layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Asynchronous Dual-Port Operation | Independent read/write clocks not required - enables interface between unrelated bus domains (e.g., UART ↔ microcontroller). |
| Retransmit Capability | Hardware-level read-pointer reset via FL/RT pulse - eliminates software overhead in loopback testing and calibration sequences. |
| Expandable Architecture | Width expansion (bit-wise) and depth expansion (word-wise) supported without external glue logic - scales to 196K×9 in compound configurations. |
| Status Flag Logic | EF/FF/XO/HF generated internally with guaranteed timing - allows direct connection to FPGA control inputs or microcontroller GPIOs. |
| Industrial Temperature Range | –40°C to +85°C operation in SOIC package - validated for use in uncontrolled ambient enclosures without forced cooling. |
Applications
| Industrial Data Acquisition | Legacy Bus Bridge |
|---|---|
Use Scenario: High-speed analog-to-digital sampling at 1 MSPS feeds burst data into a slower host processor via SPI or parallel interface. IC Role / Device Role / Timing Role: Asynchronous FIFO buffers ADC output stream, absorbing timing jitter and preventing sample loss during host interrupt latency. Use Value: Eliminates need for DMA or complex double-buffering firmware; EF/FF flags enable lock-free hardware handshaking. | Use Scenario: Connecting an ISA-bus industrial controller to a modern ARM-based HMI over parallel I/O. IC Role / Device Role / Timing Role: Rate-matching FIFO isolates ISA's 8 MHz strobe domain from ARM's variable GPIO read timing. Use Value: Prevents bus hang on timing mismatch; retransmit feature supports diagnostic register dump replay without host intervention. |
| Test Equipment Pattern Generator | Motor Drive Communication Interface |
Use Scenario: Arbitrary waveform generator loads precomputed DAC values from SRAM into output pipeline at precise intervals. IC Role / Device Role / Timing Role: IDT7204L25SO holds 4K samples; RT signal triggers repeat playback of calibration sequence. Use Value: Enables deterministic sub-microsecond pattern restart without CPU involvement or memory reload. | Use Scenario: Isolating fieldbus (CANopen) message reception from real-time PWM update engine in servo drive. IC Role / Device Role / Timing Role: FIFO decouples non-deterministic CAN message arrival from fixed 100 μs PWM cycle. Use Value: Guarantees no command loss during transient bus load; EF/FF flags feed directly to safety monitor logic. |
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 | ECL-based, 2K×9, 3.3V supply, 2.5 ns access - faster but incompatible voltage and logic family. | Used in RF test gear requiring sub-ns timing; not suitable for 5V industrial systems. | Select only for ECL-compatible designs needing ultra-low latency; requires level-shifting and separate power rail. |
| Microchip 23LCV1024-I/SN | Serial SPI SRAM, 128K×8, 3.3V, 20 MHz clock - serial interface, no native flags or retransmit. | Used in space-constrained IoT nodes where pin count > speed; lacks hardware handshaking. | Choose when board area is critical and software-managed buffering is acceptable; no direct pin or functional replacement. |
Compared with MC100E131FN and 23LCV1024-I/SN, the IDT7204L25SO uniquely delivers 5V-compatible asynchronous dual-port operation with integrated status flags and retransmit in SOIC-28 - making it optimal for industrial rate buffering where voltage compatibility, deterministic latency, and hardware handshaking are mandatory.
Availability
IDT7204L25SO is available at Aetrix Electronics and suitable for industrial data acquisition, legacy bus bridging, and motor drive communication interfaces requiring stable component supply across extended product lifecycles.
Supply support for IDT7204L25SO 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, RF, and sensor signal conditioning ICs.
The IDT7204L25SO belongs to the IDT720x family of high-speed CMOS asynchronous FIFOs, engineered for deterministic data buffering in industrial, military, and communications equipment where clock domain isolation and hardware handshaking are essential.
FAQ
What is the memory organization of the IDT7204L25SO?
The IDT7204L25SO implements a 4,096-word deep × 9-bit wide First-In/First-Out buffer. The 9-bit width accommodates 8-bit data plus one parity or control bit. This configuration is fixed and cannot be reconfigured as 8K×4 or other variants. The IDT7204L25SO uses internal pointers and flag logic to manage data flow without external address decoding.
Does the IDT7204L25SO support both commercial and industrial temperature ranges?
Yes, the IDT7204L25SO is specified for industrial temperature operation from –40°C to +85°C. It is packaged in SOIC (SO28-3), which is explicitly listed in the datasheet as available for IDT7204 in industrial grade. The "L25" speed grade denotes 25ns access time, validated across this full industrial range.
Can the IDT7204L25SO be used in depth expansion configurations?
Yes, the IDT7204L25SO supports depth expansion via its XI (Expansion In) and XO/HF (Expansion Out) pins. In depth expansion mode, multiple IDT7204L25SO devices are daisy-chained to increase total word depth. However, the Retransmit (RT) and Half-Full (HF) functions are disabled in this mode, and composite EF/FF flags must be generated externally using OR logic.
What is the purpose of the FL/RT pin on the IDT7204L25SO?
The FL/RT pin on the IDT7204L25SO serves a dual function: in Single Device Mode, a LOW pulse triggers Retransmit, resetting the read pointer to location zero while preserving the write pointer. In Depth Expansion Mode, it designates the first device when grounded. The IDT7204L25SO requires this pin to be held HIGH during normal operation unless retransmit or first-load sequencing is needed.
Is the IDT7204L25SO pin-compatible with other members of the IDT720x family?
Yes, the IDT7204L25SO is pin- and functionally compatible with the entire IDT720x family (IDT7203 through IDT7208) in the same package variant. All share identical SOIC-28 pinouts, control signal definitions, and flag behavior. This allows drop-in upgrades - for example, replacing IDT7204L25SO with IDT7205L25SO increases depth to 8,192×9 without PCB changes.
IDT7204L25SO Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 7200
- Package/Case:
- 28-SOIC (0.345", 8.77mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Size:
- 36K (4K x 9)
- Function:
- Asynchronous
- Data Rate:
- 28.5MHz
- Access Time:
- 25ns
- 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
IDT7204L25SO FAQ
1.How can I place an order for IDT7204L25SO through Aetrix?
Please submit a Request for Quotation (RFQ) for IDT7204L25SO 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 IDT7204L25SO reliable?
The price and inventory of IDT7204L25SO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IDT7204L25SO is usually 5 days.
3.What payment methods are accepted for IDT7204L25SO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IDT7204L25SO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IDT7204L25SO?
IDT7204L25SO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IDT7204L25SO 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 IDT7204L25SO?
For technical support, including IDT7204L25SO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IDT7204L25SO requirements.
6.How does Aetrix verify that IDT7204L25SO is sourced from the original manufacturer or authorized distributors?
All IDT7204L25SO 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 IDT7204L25SO meets industry standards.
7.What is the process for return or replacement of IDT7204L25SO?
All IDT7204L25SO units undergo pre-shipment inspection (PSI). If there is an issue with IDT7204L25SO, 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 IDT7204L25SO part is unused and in its original packaging.
Return procedure for IDT7204L25SO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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