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Home > Products > Integrated Circuits (ICs) > Logic > Translators, Level Shifters

Renesas 85222AM-02LF

Name: 85222AM-02LF
Brand: Renesas
SKU: 85222AM-02LF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 85222AM-02LF

Manufacturer:: Renesas

Category:: Translators, Level Shifters

Package:

Datasheet:: 85222AM-02LF.pdf

Description:: IC TRANSLTR UNIDIRECTIONAL 8SOIC

Quantity:: RFQ Add To RFQ list

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Inventory:1,970

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Product details

Overview

85222AM-02LF from Integrated Device Technology (IDT) is a 1-to-2 LVCMOS/LVTTL-to-differential HSTL clock translator with one single-ended input and two differential HSTL output pairs, supporting up to 350 MHz operation at 3.3 V supply, 0°C to 70°C ambient, and used in high-speed memory interface timing paths.

For engineers reviewing the 85222AM-02LF datasheet, 85222AM-02LF pinout, 85222AM-02LF application, or 85222AM-02LF equivalent, this page delivers verified pin functions, HSTL-level translation behavior, part-to-part skew (250 ps max), propagation delay (1.25 ns max), and termination requirements for reliable DDR memory subsystem design.

Technical Context

The 85222AM-02LF implements a single-input, dual-output translation architecture where an LVCMOS/LVTTL clock signal is converted into two matched HSTL differential output pairs (Q0/nQ0 and Q1/nQ1), each requiring 50 Ω termination to ground per output leg. Internal CLK pulldown resistors (51 kΩ typical) ensure defined logic state during floating input conditions.

It operates exclusively at 3.3 V ±5% supply, delivers HSTL-compliant output voltage swing (0.6–1.4 V peak-to-peak), crossover voltage (0.68–0.9 V), and guarantees output skew ≤25 ps between Q0/nQ0 and Q1/nQ1 under matched load and supply conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Type	LVCMOS/LVTTL single-ended clock with internal 51 kΩ pulldown resistor
Output Format	Two independent HSTL differential output pairs (Q0/nQ0, Q1/nQ1)
Max Frequency	350 MHz - supports DDR2/DDR3 memory clock distribution
Propagation Delay	1.25 ns max - enables tight timing budget control in synchronous systems
Part-to-Part Skew	250 ps max - critical for multi-device clock tree synchronization
Supply Voltage	3.3 V ±5% - requires stable core rail; no dual-supply support
Operating Temp	0°C to 70°C ambient - industrial-grade rating for embedded computing

Pinout & Package

85222AM-02LF is housed in an 8-pin SOIC package (M suffix), 3.90 mm × 4.92 mm × 1.37 mm body, lead-free and RoHS compliant per ordering code ICS85222AM-02LF.

Pin/Terminal	Circuit Role	Design Meaning
1, 2 Q0, nQ0	Differential Output Pair	HSTL-compliant complementary outputs; require 50 Ω termination to ground per leg
3, 4 Q1, nQ1	Differential Output Pair	Second independent HSTL output pair; identical electrical specs to Q0/nQ0
5 GND	Power Ground	Primary return path for core and output currents; must be low-impedance
6 nc	No Connect	Internally unconnected; must remain floating - no external tie required
7 CLK	Single-Ended Input	LVCMOS/LVTTL-compatible clock input with internal 51 kΩ pulldown resistor
8 V_DD	Positive Supply	3.3 V ±5% core supply; decoupling capacitor (0.1 µF) required near pin

Key Features

Feature	Design Value
Dual HSTL output pairs	Enables fanout to two independent memory channels or PHYs without external buffering
Internal CLK pulldown	Eliminates need for external pull-down resistor on clock input, reducing BOM count and layout area
Matched output skew	≤25 ps skew between Q0/nQ0 and Q1/nQ1 ensures phase-aligned timing across parallel data paths
50 Ω output termination requirement	Defines mandatory external termination scheme for HSTL compliance and signal integrity
Lead-free SOIC packaging	Meets RoHS Directive 2011/65/EU; compatible with standard reflow profiles for automated assembly

Applications

DDR2 Memory Interface	DDR3 Clock Distribution
Use Scenario: Driving address/command clocks to dual-rank DDR2 SDRAM modules in networking line cards. IC Role / Device Role / Timing Role: Single-ended system clock translator generating two synchronized HSTL differential clocks for rank-select timing. Use Value: Reduces jitter accumulation versus discrete buffer solutions and maintains <250 ps part-to-part skew across temperature.	Use Scenario: Fanout of CPU memory controller clock to multiple DDR3 DIMM slots in industrial server motherboards. IC Role / Device Role / Timing Role: HSTL level-shifting translator ensuring clean, matched differential clocks for parallel memory channels. Use Value: Enables deterministic 350 MHz operation with guaranteed 1.25 ns max propagation delay and 50 Ω-terminated outputs.
FPGA Memory Controller Interface	ASIC High-Speed I/O Timing
Use Scenario: Providing HSTL clock signals from FPGA I/O banks to external DDR3 memory in test equipment. IC Role / Device Role / Timing Role: Bridge between FPGA's LVCMOS clock output and memory's HSTL clock input requirements. Use Value: Eliminates need for custom PCB-level level-shifting; supports full 350 MHz bandwidth with minimal added skew.	Use Scenario: Clock domain translation in ASIC-based storage controllers interfacing with HSTL-compliant DRAM buffers. IC Role / Device Role / Timing Role: Precision clock translator maintaining sub-250 ps inter-device skew across multi-chip timing domains. Use Value: Ensures setup/hold margin preservation in high-speed memory subsystems operating at 350 MHz.

DDR2 Memory Interface

DDR3 Clock Distribution

Use Scenario: Driving address/command clocks to dual-rank DDR2 SDRAM modules in networking line cards.

IC Role / Device Role / Timing Role: Single-ended system clock translator generating two synchronized HSTL differential clocks for rank-select timing.

Use Value: Reduces jitter accumulation versus discrete buffer solutions and maintains <250 ps part-to-part skew across temperature.

Use Scenario: Fanout of CPU memory controller clock to multiple DDR3 DIMM slots in industrial server motherboards.

IC Role / Device Role / Timing Role: HSTL level-shifting translator ensuring clean, matched differential clocks for parallel memory channels.

Use Value: Enables deterministic 350 MHz operation with guaranteed 1.25 ns max propagation delay and 50 Ω-terminated outputs.

FPGA Memory Controller Interface

ASIC High-Speed I/O Timing

Use Scenario: Providing HSTL clock signals from FPGA I/O banks to external DDR3 memory in test equipment.

IC Role / Device Role / Timing Role: Bridge between FPGA's LVCMOS clock output and memory's HSTL clock input requirements.

Use Value: Eliminates need for custom PCB-level level-shifting; supports full 350 MHz bandwidth with minimal added skew.

Use Scenario: Clock domain translation in ASIC-based storage controllers interfacing with HSTL-compliant DRAM buffers.

IC Role / Device Role / Timing Role: Precision clock translator maintaining sub-250 ps inter-device skew across multi-chip timing domains.

Use Value: Ensures setup/hold margin preservation in high-speed memory subsystems operating at 350 MHz.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
IDT 85222AM-01LF	Same 8-pin SOIC package and HSTL output structure, but rated for 250 MHz max frequency and lower propagation delay (1.1 ns max).	Suitable for DDR2-only designs where 350 MHz headroom is unnecessary; lower power consumption at reduced frequency.	Select when system clock rate ≤250 MHz and tighter propagation delay tolerance is required.
Renesas 85222AM-02LFT	Identical electrical specs and pinout; differs only in tape-and-reel packaging (vs. tube for -02LF) and same 0°C to 70°C temp grade.	No functional difference; selected for automated SMT production requiring reel-fed placement.	Choose for volume manufacturing with pick-and-place machines; same performance and compatibility as 85222AM-02LF.

Compared with 85222AM-02LF, the -01LF offers lower-frequency optimization with improved delay spec, while the -02LFT provides identical functionality in tape-and-reel form - both preserve pinout, HSTL output behavior, and thermal profile, enabling direct substitution in layout-constrained or high-volume contexts.

Availability

85222AM-02LF is available at Aetrix Electronics and suitable for DDR2 memory interface, DDR3 clock distribution, and FPGA memory controller interface applications requiring stable component supply, consistent lead-free sourcing, and guaranteed 0°C to 70°C industrial temperature operation.

Supply support for 85222AM-02LF 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 power management ICs for communications, computing, and industrial markets.

The 85222AM-02LF belongs to IDT's HiPerClockS™ family of high-performance clock translators, designed specifically for low-skew, high-frequency clock distribution in DDR memory subsystems and high-speed digital interfaces.

FAQ

What is the maximum operating frequency supported by the 85222AM-02LF?

The 85222AM-02LF supports a maximum output frequency of 350 MHz, validated under 3.3 V ±5% supply and 0°C to 70°C ambient conditions. This rating applies to both differential output pairs simultaneously when properly terminated with 50 Ω to ground per leg, as specified in the AC Characteristics table of the official datasheet revision B.

Does the 85222AM-02LF require external termination resistors?

Yes, the 85222AM-02LF requires external 50 Ω termination resistors to ground on all four differential output pins (Q0, nQ0, Q1, nQ1). The device does not integrate termination; failure to apply correct termination results in signal integrity degradation, incorrect HSTL voltage levels, and violation of output crossover voltage (0.68–0.9 V) and swing (0.6–1.4 V) specifications.

What is the function of the 'nc' pin (pin 6) on the 85222AM-02LF?

Pin 6 of the 85222AM-02LF is marked 'nc' (no connect) and is internally unconnected. It must remain electrically floating - no external connection, pull-up, or pull-down is permitted. This pin serves no circuit function and is reserved for future use or package compatibility; connecting it may compromise device reliability or violate absolute maximum ratings.

Can the 85222AM-02LF operate with a 2.5 V supply voltage?

No, the 85222AM-02LF is specified exclusively for 3.3 V ±5% operation (3.135 V to 3.465 V). Its internal circuitry, including input threshold levels (V_IH = 2 V min, V_IL = 0.8 V max) and HSTL output drive characteristics (V_OH = 1.0–1.4 V, V_OL = 0–0.4 V), are designed and tested only at 3.3 V. Operation at 2.5 V is outside specification and may result in undefined logic states or failure to meet timing parameters.

How is part-to-part skew measured for the 85222AM-02LF?

Part-to-part skew for the 85222AM-02LF is defined as the maximum time difference (250 ps) between corresponding differential output crossing points (e.g., Q0 vs. Q0 on another unit) across separate devices under identical supply voltage, load, and input stimulus conditions. It is measured per JEDEC Standard 65 and reflects worst-case variation between units in production, not within a single device.

85222AM-02LF Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:

Packaging:: Tube

Product Status:: Obsolete

Translator Type:: Mixed Signal

Channel Type:: Unidirectional

Number of Circuits:: 1

Channels per Circuit:: 2

Voltage - VCCA:: -

Voltage - VCCB:: -

Input Signal:: LVCMOS, LVTTL

Output Signal:: HSTL

Output Type:: Differential

Data Rate:: -

Operating Temperature:: 0°C ~ 70°C (TA)

Grade:: -

Qualification:: -

Features:: -

Mounting Type:: Surface Mount

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

85222AM-02LF FAQ

1.How can I place an order for 85222AM-02LF through Aetrix?

Please submit a Request for Quotation (RFQ) for 85222AM-02LF 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 85222AM-02LF reliable?

The price and inventory of 85222AM-02LF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 85222AM-02LF is usually 5 days.

3.What payment methods are accepted for 85222AM-02LF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 85222AM-02LF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 85222AM-02LF?

85222AM-02LF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 85222AM-02LF 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 85222AM-02LF?

For technical support, including 85222AM-02LF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 85222AM-02LF requirements.

6.How does Aetrix verify that 85222AM-02LF is sourced from the original manufacturer or authorized distributors?

All 85222AM-02LF 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 85222AM-02LF meets industry standards.

7.What is the process for return or replacement of 85222AM-02LF?

All 85222AM-02LF units undergo pre-shipment inspection (PSI). If there is an issue with 85222AM-02LF, 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 85222AM-02LF part is unused and in its original packaging.

Return procedure for 85222AM-02LF:

1.Submit a request within 90 days.

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

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