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Analog Devices LTC6957IDD-3#PBF — Clock & Timing ICs

LTC6957IDD-3#PBF Fanout Buffer — 300 MHz, CMOS Output

MPNLTC6957IDD-3#PBF
End of Life

Analog Devices LTC6957IDD-3#PBF, Fanout Buffer (Distribution), 1:2 ratio, 300 MHz max, accepts CML, CMOS, LVDS, LVPECL inputs, single-ended CMOS output, 3.15V–3.45V supply, –40°C to 85°C, 12-WFDFN exposed-pad package.

$10.82Ref. price · indicative, final on quote
Analog Devices LTC6957IDD-3#PBF datasheet (PDF)
Packaging12-WFDFN Exposed Pad
RoHSROHS3 Compliant
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

LTC6957IDD-3#PBF specifications
ParameterValue
TypeFanout Buffer (Distribution)
MountingSurface Mount
Voltage3.15V ~ 3.45V
Frequency300 MHz
Operating temperature-40°C ~ 85°C
InputCML, CMOS, LVDS, LVPECL
OutputCMOS
PackageTube
Case12-WFDFN Exposed Pad
Number of circuits1
Ratio - Input:Output1:2
Differential - Input:OutputYes/No

Product details

Device identity and signal interface

The LTC6957IDD-3#PBF is a 1:2 fanout buffer from Analog Devices, part of the LTC6957 family. It accepts differential or single-ended clock inputs across CML, CMOS, LVDS, and LVPECL standards and delivers a single-ended CMOS output at up to 300 MHz. The supply rail is tight at 3.15V to 3.45V — a 3.3V rail with ±5% regulation stays inside the envelope; a 2.5V or 5V rail requires an intermediate regulator. Not rated for under-hood or avionics environments.

Housed in a 12-lead WFDFN with an exposed pad (3x3 mm body, supplier package 12-DFN). Surface-mount only; no through-hole variant. The 0.50 mm pitch demands careful PCB layout — a 2-layer board can work with proper fan-out, but 4-layer simplifies signal integrity for the 300 MHz clock path.

ROHS3 compliant (lead-free).

Active and available through our distribution network. Small quantities (tube quantities) are typically feasible.

Frequently asked questions

Can LTC6957IDD-3#PBF be used with LVPECL inputs?

Yes — the input stage accepts LVPECL, along with CML, CMOS, and LVDS. The output is single-ended CMOS, so the differential LVPECL signal is converted to a CMOS-level fan-out.

Is LTC6957IDD-3#PBF a lead-free part?

Yes, it is ROHS3 compliant, meaning it meets the lead-free and restricted-substance requirements of the ROHS directive.