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Renesas Electronics 551MILFT — Clock & Timing ICs

551MILFT Clock Fanout Buffer, 1:4, 160 MHz, 8-SOIC

MPN551MILFT
End of Life

Renesas ClockBlocks™ 551MILFT, Fanout Buffer (Distribution), 1:4 CMOS fanout, 160 MHz max, 3V to 5.5V supply, 8-SOIC package, -40°C to 85°C.

$2.81Ref. price · indicative, final on quote
Packaging8-SOIC (0.154", 3.90mm Width)
RoHSROHS3 Compliant
SeriesClockBlocks™
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

551MILFT specifications
ParameterValue
TypeFanout Buffer (Distribution)
SeriesClockBlocks™
MountingSurface Mount
Voltage3V ~ 5.5V
Frequency160 MHz
Operating temperature-40°C ~ 85°C
InputCMOS
OutputCMOS
PackageTape & Reel (TR); Cut Tape (CT)
Case8-SOIC (0.154\", 3.90mm Width)
Number of circuits1
Ratio - Input:Output1:4
Differential - Input:OutputNo/No

Product details

160 MHz CMOS fanout buffer for clock distribution

The Renesas 551MILFT is a single-circuit, 1:4 fanout buffer from the ClockBlocks™ family. It takes one CMOS input and delivers four CMOS outputs, with a maximum frequency of 160 MHz. The supply voltage range of 3V to 5.5V lets it sit on either a 3.3V or 5V rail without a level shifter. The non-differential I/O (CMOS in, CMOS out) makes it a straight drop-in for single-ended clock trees in industrial control, telecom, and data-acquisition systems where you need to distribute a reference clock to multiple loads without loading the source.

Industrial temperature range and package

The 8-SOIC package (0.154" body width, 3.90 mm) is a standard footprint that routes easily on two-layer boards. Surface-mount assembly with no exposed pad means no thermal-via planning; just standard decoupling at the supply pin.

Store the reels dry — standard MSL handling applies, though the specific level is not listed here.

Frequently asked questions

What is the closest functional second-source for 551MILFT?

A close functional peer is the 5PB1104CMGK/W, also a 1:4 clock buffer with LVCMOS outputs, but it operates at a lower supply voltage (1.71 V typical) and a higher maximum frequency (200 MHz). The 551MILFT's wider 3V-to-5.5V supply range makes it a better fit for legacy 5V logic systems, while the 5PB1104 targets lower-voltage, higher-speed designs. Verify pin-compatibility and timing margins before substituting.