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Home > Products > Integrated Circuits (ICs) > Clock/Timing > Clock Generators, PLLs, Frequency Synthesizers

Renesas 87321AMILF

Name: 87321AMILF
Brand: Renesas
SKU: 87321AMILF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 87321AMILF

Manufacturer:: Renesas

Category:: Clock Generators, PLLs, Frequency Synthesizers

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: 87321AMILF.pdf

Description:: IC CLOCK GENERATOR 8SOIC

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Product details

Overview

87321AMILF from Renesas Electronics (formerly IDT) is a high-performance ÷1/÷2 differential-to-LVPECL clock generator used for precision clock distribution in timing-critical systems. It accepts LVPECL, LVDS, LVHSTL, SSTL, or HCSL inputs, delivers one LVPECL output pair (Q/nQ), operates at up to 700 MHz input frequency, and guarantees ≤600 ps part-to-part skew across -40°C to +85°C ambient temperature.

For engineers reviewing the 87321AMILF datasheet, 87321AMILF pinout, 87321AMILF application, or 87321AMILF equivalent, this device is selected for low-jitter clock fanout, deterministic skew control in multi-chip synchronization, and compatibility with mixed-signaling environments requiring translation from single-ended (LVCMOS/LVTTL) or differential sources to LVPECL levels.

Technical Context

The 87321AMILF implements a dual-mode programmable divider (÷1 or ÷2) controlled by the F_SEL pin, with master reset (MR) enabling synchronous initialization of output states. Its internal architecture supports both differential and resistor-biased single-ended input drive on CLK/nCLK, leveraging internal 51 kΩ pullup/pulldown resistors for level adaptation.

It features fully differential LVPECL outputs (Q/nQ) terminated to V_CC–2V, with propagation delay ≤1.8 ns, additive phase jitter ≤0.18 ps RMS (12 kHz–20 MHz integration), and output duty cycle 45–55% - all specified across 2.5 V or 3.3 V supply operation and validated per JEDEC Standard 65 for skew measurement.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Frequency Max	700 MHz - supports high-speed serial link reference clocks (e.g., 155.52 MHz, 311.04 MHz, 622.08 MHz).
Output Type	Differential LVPECL - requires 50 Ω termination to V_CC–2V for proper logic levels and signal integrity.
Propagation Delay	≤1.8 ns - enables tight timing budget allocation in synchronous systems with minimal path delay uncertainty.
Additive Phase Jitter	0.18 ps RMS (12 kHz–20 MHz) - preserves signal spectral purity for jitter-sensitive applications like SONET/SDH or PCIe Gen1/2.
Part-to-Part Skew	≤600 ps - ensures deterministic inter-device timing alignment in parallel clock distribution networks.
Supply Voltage	2.5 V ±5% or 3.3 V ±5% - dual-voltage support simplifies integration into mixed-supply FPGA or ASIC timing subsystems.
Operating Temp	–40°C to +85°C - qualified for industrial and telecom infrastructure environments without derating.

Pinout & Package

87321AMILF is housed in an 8-lead lead-free SOIC package (M suffix), 3.90 mm × 4.90 mm × 1.37 mm body size, compliant with JEDEC MS-012 outline.

Pin/Terminal	Circuit Role	Design Meaning
1 - CLK	Differential Input (non-inverting)	Pulldown-biased; accepts LVPECL/LVDS/LVHSTL/SSTL/HCSL; supports single-ended LVCMOS/LVTTL with nCLK bias.
2 - nCLK	Differential Input (inverting)	Pullup-biased; forms differential pair with CLK; sets common-mode reference when biased for single-ended drive.
3 - MR	Control Input (active-high)	Resets internal dividers: forces Q low / nQ high; uses LVCMOS/LVTTL logic levels; internal pulldown.
4 - F_SEL	Control Input	Selects ÷1 (F_SEL = 0) or ÷2 (F_SEL = 1); internal pulldown; LVCMOS/LVTTL compatible.
5 - V_EE	Negative Supply	Ground reference for LVPECL outputs; must be connected to system ground (0 V) in standard configurations.
6,7 - nQ, Q	Differential LVPECL Output	True/inverted LVPECL pair; swing 0.4–1.0 V_PP; requires 50 Ω termination to V_CC–2V.
8 - V_CC	Positive Supply	Supplies core and output drivers; supports 2.5 V or 3.3 V; decoupling required near pin.

Key Features

Feature	Design Value
Dual-supply operation	Validated at both 2.5 V and 3.3 V - eliminates need for level-shifting in mixed-voltage timing trees.
Multi-standard input compatibility	Accepts LVPECL, LVDS, LVHSTL, SSTL, HCSL without external components - reduces BOM count and layout complexity.
Single-ended input support	Enables LVCMOS/LVTTL drive via resistor bias on nCLK - allows reuse of legacy clock sources without redesign.
Guaranteed skew performance	≤600 ps part-to-part skew - enables deterministic timing across multiple 87321AMILF devices in parallel clock fanout.
Low additive jitter	0.18 ps RMS additive phase jitter - maintains signal integrity for high-speed serial interfaces requiring <1 ps total jitter budgets.

Applications

Telecom Line Card Clock Distribution	High-Speed FPGA Reference Clocking
Use Scenario: Distributing synchronized 155.52 MHz or 622.08 MHz clocks across multiple SerDes PHYs on a line card. IC Role / Device Role / Timing Role: Low-skew LVPECL clock generator translating backplane LVDS or on-board LVPECL sources to local FPGA/ASIC clock domains. Use Value: ≤600 ps part-to-part skew ensures deterministic inter-chip setup/hold margins; 0.18 ps jitter preserves BER in OC-48/OC-192 links.	Use Scenario: Providing clean, divided reference clocks to Xilinx or Intel FPGAs with LVPECL-capable clock inputs. IC Role / Device Role / Timing Role: ÷1/÷2 programmable clock buffer generating matched Q/nQ outputs for differential clock tree routing. Use Value: Dual-voltage support (2.5 V/3.3 V) aligns with FPGA I/O bank voltage; 1.8 ns propagation delay enables precise clock network modeling.
Industrial PLC Synchronization	Test Equipment Clock Fanout
Use Scenario: Aligning real-time clocks across distributed I/O modules in modular PLC chassis operating at –40°C to +85°C. IC Role / Device Role / Timing Role: Industrial-grade clock repeater accepting LVDS from central controller and distributing LVPECL to local timing ICs. Use Value: Guaranteed operation over full industrial temperature range; internal pull resistors simplify control pin interfacing (MR/F_SEL).	Use Scenario: Multiplying/dividing a master 10 MHz OCXO output to generate multiple test frequencies (e.g., 100 MHz, 200 MHz) for ATE channel clocks. IC Role / Device Role / Timing Role: Precision clock generator providing low-jitter, skew-controlled outputs to multiple DUT interface boards. Use Value: 0.18 ps additive jitter minimizes measurement uncertainty; 700 MHz input capability supports wideband frequency synthesis chains.

Telecom Line Card Clock Distribution

High-Speed FPGA Reference Clocking

Use Scenario: Distributing synchronized 155.52 MHz or 622.08 MHz clocks across multiple SerDes PHYs on a line card.

IC Role / Device Role / Timing Role: Low-skew LVPECL clock generator translating backplane LVDS or on-board LVPECL sources to local FPGA/ASIC clock domains.

Use Value: ≤600 ps part-to-part skew ensures deterministic inter-chip setup/hold margins; 0.18 ps jitter preserves BER in OC-48/OC-192 links.

Use Scenario: Providing clean, divided reference clocks to Xilinx or Intel FPGAs with LVPECL-capable clock inputs.

IC Role / Device Role / Timing Role: ÷1/÷2 programmable clock buffer generating matched Q/nQ outputs for differential clock tree routing.

Use Value: Dual-voltage support (2.5 V/3.3 V) aligns with FPGA I/O bank voltage; 1.8 ns propagation delay enables precise clock network modeling.

Industrial PLC Synchronization

Test Equipment Clock Fanout

Use Scenario: Aligning real-time clocks across distributed I/O modules in modular PLC chassis operating at –40°C to +85°C.

IC Role / Device Role / Timing Role: Industrial-grade clock repeater accepting LVDS from central controller and distributing LVPECL to local timing ICs.

Use Value: Guaranteed operation over full industrial temperature range; internal pull resistors simplify control pin interfacing (MR/F_SEL).

Use Scenario: Multiplying/dividing a master 10 MHz OCXO output to generate multiple test frequencies (e.g., 100 MHz, 200 MHz) for ATE channel clocks.

IC Role / Device Role / Timing Role: Precision clock generator providing low-jitter, skew-controlled outputs to multiple DUT interface boards.

Use Value: 0.18 ps additive jitter minimizes measurement uncertainty; 700 MHz input capability supports wideband frequency synthesis chains.

Equivalent & Alternatives

The following parts are listed as comparable options for similar clock generator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
IDT 87322AMILF	Two independent LVPECL output pairs (Q1/nQ1, Q2/nQ2); same ÷1/÷2 function per channel.	Supports dual-output clock trees without cascading; higher channel count increases PCB routing density.	Choose when two synchronized but isolated LVPECL outputs are required instead of single-pair fanout.
Renesas 8T49N241	Programmable 2-output femtoClock™ synthesizer with integrated PLL; supports fractional-N synthesis and I²C configuration.	Replaces crystal+buffer+divider combinations; adds frequency flexibility but requires firmware initialization.	Choose when dynamic frequency reconfiguration or ultra-low jitter (<0.1 ps) is needed, not just fixed-ratio division.

Compared with 87321AMILF, the 87322AMILF offers dual-output capability without added latency or jitter penalty, while the 8T49N241 provides programmable synthesis at the cost of increased design complexity and non-drop-in replacement requirements.

Availability

87321AMILF is available at Aetrix Electronics and suitable for telecom infrastructure, FPGA-based embedded systems, industrial automation controllers, and automated test equipment requiring stable component supply and long-term lifecycle support.

Supply support for 87321AMILF 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

Renesas Electronics Corporation is a global semiconductor leader formed from the merger of NEC Electronics, Renesas Technology, and IDT, delivering high-performance analog, mixed-signal, and timing solutions.

The 87321AMILF belongs to Renesas' HiPerClockS™ family of high-precision clock generators, designed specifically for low-skew, low-jitter clock distribution in telecom, datacom, and high-end computing systems.

FAQ

What input signal standards does the 87321AMILF support?

The 87321AMILF supports LVPECL, LVDS, LVHSTL, SSTL, and HCSL differential inputs directly on its CLK/nCLK pins. It also accepts single-ended LVCMOS and LVTTL signals when the nCLK pin is resistor-biased to V_CC/2, using internal 51 kΩ pullup/pulldown resistors to establish proper common-mode voltage. This eliminates external biasing circuitry in many legacy designs.

Can the 87321AMILF operate from both 2.5 V and 3.3 V supplies?

Yes, the 87321AMILF is fully characterized and guaranteed to operate across both 2.5 V ±5% and 3.3 V ±5% supply ranges. DC and AC specifications - including propagation delay (≤1.8 ns), part-to-part skew (≤600 ps), and additive phase jitter (0.18 ps RMS) - are validated under both conditions. No configuration change is required when switching supply voltages.

How is the divide ratio selected on the 87321AMILF?

The divide ratio on the 87321AMILF is selected via the F_SEL pin: logic low (0) configures ÷1 operation, and logic high (1) configures ÷2 operation. The pin has an internal pulldown resistor, so it defaults to ÷1 when left unconnected. MR (Master Reset) must be held low during normal operation to enable the divider; asserting MR high resets outputs (Q low, nQ high) regardless of F_SEL state.

What is the recommended termination for the LVPECL outputs of the 87321AMILF?

The 87321AMILF LVPECL outputs (Q/nQ) require 50 Ω termination to V_CC–2V. For 3.3 V operation, this is 1.3 V; for 2.5 V operation, it approximates ground (0.5 V), allowing simplified termination to GND with appropriate resistor values (e.g., 50 Ω to GND). Layout best practices include placing termination close to the output pins and using controlled-impedance 50 Ω transmission lines.

Does the 87321AMILF require external components for basic operation?

No external components are required for basic differential input operation. The 87321AMILF integrates 51 kΩ internal pullup (nCLK) and pulldown (CLK, MR, F_SEL) resistors. Only power supply decoupling capacitors (recommended: 0.1 µF ceramic + 4.7 µF tantalum near V_CC) and proper LVPECL output termination (50 Ω to V_CC–2V) are mandatory. Resistor biasing for single-ended inputs is optional and board-specific.

87321AMILF Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Obsolete

Programmable:: Not Verified

Type:: Clock Generator

PLL:: No

Input:: HCSL, LVDS, LVHSTL, LVPECL, SSTL

Output:: LVPECL

Number of Circuits:: 1

Ratio - Input:Output:: 1:1

Differential - Input:Output:: Yes/Yes

Frequency - Max:: 700MHz

Divider/Multiplier:: Yes/No

Voltage - Supply:: 2.375V ~ 3.465V

Operating Temperature:: -40°C ~ 85°C

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

Supplier Device Package:: 8-SOIC

87321AMILF FAQ

1.How can I place an order for 87321AMILF through Aetrix?

Please submit a Request for Quotation (RFQ) for 87321AMILF 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 87321AMILF reliable?

The price and inventory of 87321AMILF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 87321AMILF is usually 5 days.

3.What payment methods are accepted for 87321AMILF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 87321AMILF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 87321AMILF?

87321AMILF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 87321AMILF 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 87321AMILF?

For technical support, including 87321AMILF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 87321AMILF requirements.

6.How does Aetrix verify that 87321AMILF is sourced from the original manufacturer or authorized distributors?

All 87321AMILF 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 87321AMILF meets industry standards.

7.What is the process for return or replacement of 87321AMILF?

All 87321AMILF units undergo pre-shipment inspection (PSI). If there is an issue with 87321AMILF, 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 87321AMILF part is unused and in its original packaging.

Return procedure for 87321AMILF:

1.Submit a request within 90 days.

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

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