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Renesas ICS2304NZGI-1T
- Part No.:
- ICS2304NZGI-1T
- Manufacturer:
- Renesas
- Category:
- Clock Buffers, Drivers
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ICS2304NZGI-1T.pdf
- Description:
- IC CLK BUFFER 1:4 140MHZ 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,177
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Product details
Overview
ICS2304NZGI-1T from Integrated Device Technology (IDT) is a low-skew, low-jitter 1:4 PCI/PCI-X clock fanout buffer operating at 3.3 V ±10% across 0–140 MHz. It distributes one input clock to four synchronized CMOS outputs with ≤100 ps output-to-output skew and supports industrial temperature range (−40°C to +85°C). Used in PCI/PCI-X bus timing distribution for embedded industrial controllers and legacy server backplanes.
For engineers reviewing the ICS2304NZGI-1T datasheet, ICS2304NZGI-1T pinout, ICS2304NZGI-1T application, or ICS2304NZGI-1T equivalent, key selection criteria include guaranteed skew performance under full-load conditions, OE-controlled tri-state capability, TSSOP-8 thermal profile, and industrial-grade reliability without derating at 85°C ambient.
Technical Context
The ICS2304NZGI-1T implements a single-input, quad-output fanout architecture with active-high output enable (OE) controlling all four clock outputs simultaneously. Its internal logic ensures simultaneous edge alignment across CLK0–CLK3, minimizing inter-channel timing uncertainty critical for synchronous PCI-X data capture.
Designed specifically for legacy high-speed parallel bus systems, it meets PCI/PCI-X timing compliance requirements including cycle-to-cycle jitter ≤200 ps and propagation delay matching ≤3.8 ns (tPLH/tPHL). The device operates exclusively at 3.3 V and does not support mixed-voltage or level-shifting interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.3 V ±10% - Requires stable 3.3 V rail; no internal regulation or tolerance for 2.5 V or 5 V operation. |
| Frequency Range | 0–140 MHz - Fully characterized up to 140 MHz; usable for 33 MHz, 66 MHz, and 133 MHz PCI/PCI-X modes. |
| Output Skew | ≤100 ps - Ensures deterministic setup/hold margins across all four buffered clocks in multi-slot backplane designs. |
| Propagation Delay | 1.8–3.8 ns - Tight delay window enables precise clock tree budgeting in timing-critical control plane applications. |
| Operating Temperature | −40°C to +85°C - Qualified for industrial environments; no derating required across full range. |
| Jitter (1-Sigma) | 14–40 ps - Low phase noise preserves signal integrity in high-speed parallel bus sampling windows. |
| Output Drive | ±24 mA - Sufficient to drive four standard PCI loads (each ~25 pF + 50 Ω) without external buffering. |
Pinout & Package
Packaged in an 8-pin TSSOP (4.4 mm body width, 0.65 mm pitch), RoHS-compliant and lead-free, with JEDEC MO-153 compliant dimensions and thermal impedance of 230.5°C/W (θJA).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CLK_IN | Input | Single-ended CMOS clock reference input; accepts 0–140 MHz square wave with 50% duty cycle. |
| 2 - OE | Input | Active-high output enable; drives all four outputs into high-impedance state when low. |
| 3 - CLK0 | Output | Buffered clock output; identical phase and timing to CLK_IN when OE = high. |
| 4 - GND | Power | Digital ground reference; must be connected to system ground plane with low-inductance path. |
| 5 - CLK1 | Output | Buffered clock output; matched skew and delay to CLK0–CLK3 for synchronous fanout. |
| 6 - VDD | Power | 3.3 V supply input; requires local 0.1 µF ceramic decoupling capacitor placed within 5 mm. |
| 7 - CLK2 | Output | Buffered clock output; electrically identical to CLK0–CLK3; no internal phase offset. |
| 8 - CLK3 | Output | Buffered clock output; final channel in 1:4 distribution bank; shares same timing specs as others. |
Key Features
| Feature | Design Value |
|---|---|
| Low output skew | ≤100 ps between CLK0–CLK3 outputs - Enables reliable multi-slot PCI/PCI-X timing margin allocation. |
| Tri-state output control | Single OE pin disables all four outputs simultaneously - Simplifies clock gating in hot-plug or power-managed backplanes. |
| Industrial temperature rating | −40°C to +85°C operation without derating - Validated for deployment in uncooled industrial enclosures and telecom line cards. |
| PCI/PCI-X timing compliance | Meets cycle-to-cycle jitter ≤200 ps and pulse skew ≤300 ps - Directly supports PCI-X 133 MHz timing budgets. |
| Lead-free packaging | Pb-free TSSOP-8 with "L" marking - Complies with RoHS Directive 2011/65/EU and IDT PDN U-09-01 green transition. |
Applications
| PCI Bus Timing Distribution | Industrial Backplane Clocking |
|---|---|
|
Use Scenario: Distributing a single 66 MHz system clock to multiple PCI slots on a ruggedized industrial motherboard. IC Role / Device Role / Timing Role: 1:4 low-skew fanout buffer ensuring simultaneous clock arrival at all slot connectors. Use Value: Eliminates need for discrete RC networks or additional buffers; maintains <100 ps inter-slot skew for reliable 66 MHz data capture. |
Use Scenario: Providing synchronized clocks to FPGA-based I/O modules in a modular PLC chassis with hot-swap capability. IC Role / Device Role / Timing Role: Clock distribution hub with OE-controlled tri-state enabling dynamic clock isolation during module insertion/removal. Use Value: Prevents clock contention and metastability during live reconfiguration; supports seamless hot-swap without system reset. |
| Legacy Server Control Plane | Test Equipment Timing Subsystem |
|
Use Scenario: Driving clock inputs of multiple ASICs and bridge chips on a PCI-X 133 MHz server motherboard. IC Role / Device Role / Timing Role: High-fidelity clock repeater preserving edge integrity and minimizing jitter accumulation across long traces. Use Value: Meets PCI-X 133 MHz cycle-to-cycle jitter spec (≤200 ps) without requiring external termination or layout tuning. |
Use Scenario: Generating four phase-aligned test clocks for parallel digital pattern generators in ATE systems. IC Role / Device Role / Timing Role: Deterministic fanout node delivering matched-delay clocks to independent DUT interface channels. Use Value: Enables sub-nanosecond inter-channel timing correlation essential for multi-port functional test vector alignment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar clock fanout applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICS2304MGI-1T | Same pinout and electrical specs, but uses MSOP-8 package (3.0 × 3.0 mm); higher θJA (260°C/W). | Preferred where board space is constrained but thermal headroom allows higher junction temperature rise. | Select ICS2304MGI-1T only if footprint reduction outweighs thermal penalty; verify PCB copper area per MSOP-8 thermal guidelines. |
| PI6C20400LEX | 4-output LVCMOS fanout buffer with 0.5–200 MHz range; 3.3 V only; max skew 75 ps; different pinout (SOIC-8). | Offers wider frequency coverage and slightly lower skew, but lacks OE control and has non-compatible pin assignment. | Choose PI6C20400LEX only when OE functionality is unnecessary and board layout permits SOIC-8 rework; not drop-in replaceable. |
Compared with ICS2304MGI-1T and PI6C20400LEX, the ICS2304NZGI-1T uniquely combines industrial temperature rating, OE-controlled tri-state, TSSOP-8 manufacturability, and documented PCI-X 133 MHz compliance - making it optimal for legacy infrastructure upgrades requiring zero-layout change and proven field reliability.
Availability
ICS2304NZGI-1T is available at Aetrix Electronics and suitable for PCI/PCI-X timing distribution, industrial backplane clocking, and legacy server control plane applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ICS2304NZGI-1T 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 solutions for communications, computing, and industrial markets.
The ICS2304NZGI-1T belongs to IDT's legacy PCI/PCI-X clock buffer product line, engineered specifically for deterministic, low-jitter clock distribution in high-reliability parallel bus systems deployed in industrial and telecom infrastructure.
FAQ
What is the maximum supported clock frequency for the ICS2304NZGI-1T?
The ICS2304NZGI-1T is fully characterized and guaranteed to operate up to 140 MHz across its entire industrial temperature range (−40°C to +85°C). This covers all standard PCI (33/66 MHz) and PCI-X (100/133 MHz) frequencies. Operation beyond 140 MHz is not specified or tested, and timing parameters such as skew and jitter are not guaranteed above this limit. The ICS2304NZGI-1T datasheet confirms 140 MHz as the absolute maximum rated frequency.
Does the ICS2304NZGI-1T support 2.5 V or 5 V operation?
No, the ICS2304NZGI-1T operates exclusively at 3.3 V ±10% (3.0 V to 3.6 V). It is not compatible with 2.5 V or 5 V supply rails. The absolute maximum ratings specify VDD up to 4.3 V, but functional operation outside the 3.0–3.6 V range is not guaranteed. Using incorrect voltage may cause timing violations or damage. The ICS2304NZGI-1T requires a clean, well-decoupled 3.3 V source per its recommended operating conditions.
Is the ICS2304NZGI-1T pin-compatible with the commercial-grade ICS2304NZG-1T?
Yes, the ICS2304NZGI-1T is pin-compatible with the commercial-grade ICS2304NZG-1T. Both share identical 8-pin TSSOP packaging, pin numbering, pin functions, and electrical interface. The sole difference is the extended industrial temperature rating (−40°C to +85°C) of the ICS2304NZGI-1T versus the commercial range (0°C to +70°C) of the ICS2304NZG-1T. No PCB changes are required when upgrading from ICS2304NZG-1T to ICS2304NZGI-1T.
What is the function of the OE pin on the ICS2304NZGI-1T?
The OE (Output Enable) pin on the ICS2304NZGI-1T is an active-high control input that enables or disables all four clock outputs (CLK0–CLK3) simultaneously. When OE is high, outputs mirror CLK_IN with low skew and delay. When OE is low, all outputs enter high-impedance (tri-state) mode, isolating downstream loads. This feature supports dynamic clock gating in hot-plug systems and power management schemes. The ICS2304NZGI-1T functionality table explicitly defines this behavior.
Does the ICS2304NZGI-1T require external termination resistors?
No, the ICS2304NZGI-1T does not require external series or parallel termination resistors for standard PCI/PCI-X loads. Its CMOS outputs are designed to drive typical 50 Ω transmission lines with ~25 pF load capacitance directly. The datasheet specifies output drive strength of ±24 mA, which matches PCI bus loading requirements. External termination may be needed only in non-standard layouts with excessive stub length or mismatched impedance - not inherent to the ICS2304NZGI-1T itself.
ICS2304NZGI-1T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Fanout Buffer (Distribution)
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 1:4
- Differential - Input:Output:
- No/No
- Input:
- LVTTL
- Output:
- Clock
- Frequency - Max:
- 140 MHz
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-TSSOP
ICS2304NZGI-1T FAQ
1.How can I place an order for ICS2304NZGI-1T through Aetrix?
Please submit a Request for Quotation (RFQ) for ICS2304NZGI-1T 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 ICS2304NZGI-1T reliable?
The price and inventory of ICS2304NZGI-1T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICS2304NZGI-1T is usually 5 days.
3.What payment methods are accepted for ICS2304NZGI-1T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICS2304NZGI-1T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICS2304NZGI-1T?
ICS2304NZGI-1T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICS2304NZGI-1T 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 ICS2304NZGI-1T?
For technical support, including ICS2304NZGI-1T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICS2304NZGI-1T requirements.
6.How does Aetrix verify that ICS2304NZGI-1T is sourced from the original manufacturer or authorized distributors?
All ICS2304NZGI-1T 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 ICS2304NZGI-1T meets industry standards.
7.What is the process for return or replacement of ICS2304NZGI-1T?
All ICS2304NZGI-1T units undergo pre-shipment inspection (PSI). If there is an issue with ICS2304NZGI-1T, 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 ICS2304NZGI-1T part is unused and in its original packaging.
Return procedure for ICS2304NZGI-1T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ICS2304NZGI-1T Tags
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PL133-37TC-R
Microchip Technology
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PL133-27GC-R
Microchip Technology
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LMK1C1102DQFR
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LMK1C1102PWR
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LMK1C1104DQFR
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CDC3RL02YFPR
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SY75602ATWL-TR
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SY75603ATWL-TR
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5PB1102CMGI8
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PL133-27GI-R
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551MLFT
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