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Infineon Technologies IMIFS741BZB — Clock & Timing ICs

IMIFS741BZB Spread Spectrum Clock Generator, 8-SOIC

MPNIMIFS741BZB
End of Life

Infineon IMIFS741BZB — PLL-based spread spectrum clock generator, 68 MHz, CMOS/TTL inputs and outputs, 8-SOIC surface-mount package, commercial temperature range 0°C to 70°C.

$1.2Ref. price · indicative, final on quote
Infineon Technologies IMIFS741BZB datasheet (PDF)
Packaging8-SOIC (0.154", 3.90mm Width)
RoHSRoHS non-compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

IMIFS741BZB specifications
ParameterValue
TypeSpread Spectrum Clock Generator
MountingSurface Mount
Supply voltage3.135V ~ 3.465V, 4.5V ~ 5.5V
Operating temperature0°C ~ 70°C (TA)
PLLYes
InputCMOS, TTL, Crystal
OutputCMOS, TTL
PackageBulk
Case8-SOIC (0.154\", 3.90mm Width)
Divider (Multiplier)Yes/No
Number of circuits1
Ratio - Input:Output1:2
Differential - Input:OutputNo/No

Product details

Spread spectrum clock generator — 68 MHz, 8-SOIC

The IMIFS741BZB is a PLL-based spread spectrum clock generator from Infineon, designed to reduce electromagnetic interference (EMI) by modulating the output clock frequency around a centre frequency. It accepts CMOS, TTL, or crystal inputs and delivers CMOS/TTL outputs at up to 68 MHz. The 1:2 input-to-output ratio means a single reference clock drives two spread-spectrum outputs, suitable for distributing a low-EMI clock to multiple peripherals on the same board.

The device operates from either a 3.3V rail (3.135V to 3.465V) or a 5V rail (4.5V to 5.5V), allowing it to slot into designs with different logic-level supplies without a separate regulator. It is not qualified for industrial or automotive temperature ranges.

Package and rework — 8-SOIC

For reel quantities, confirm the packing option with your sourcing contact.

It is listed as RoHS non-compliant (lead-bearing termination finish), which may restrict its use in RoHS-mandated markets unless an exemption applies.

Frequently asked questions

When sourcing IMIFS741BZB, what is the closest functional second-source — CY2305SXI-1HT?

The CY2305SXI-1HT is a PLL-based fanout buffer and zero-delay buffer from Infineon (formerly Cypress), not a direct spread-spectrum generator. The IMIFS741BZB provides spread-spectrum modulation, dual supply range (3.3V/5V), and a 1:2 output ratio. They are not pin-compatible or functionally equivalent for EMI reduction.

Can IMIFS741BZB replace a standard crystal oscillator?

Yes, in many designs the IMIFS741BZB can replace a fixed-frequency crystal oscillator when a spread-spectrum clock is needed to pass EMI testing. It accepts a crystal input and generates a modulated output, but the modulation depth and centre frequency must match the downstream timing budget.