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Texas Instruments CDCE421RGERG4 — Clock & Timing ICs
Texas Instruments

CDCE421RGERG4 Clock Generator, 1.2 GHz, LVDS/LVPECL

MPNCDCE421RGERG4
Obsolete

Texas Instruments CDCE421RGERG4 clock generator, PLL, 1.2 GHz max, LVDS/LVPECL outputs, 3V-3.6V supply, -40°C to 85°C, 24-VQFN (4x4).

CDCE421RGERG4 datasheet
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Specifications

CDCE421RGERG4 Technical Specifications
ParameterValue
TypeClock Generator
Mounting typeSurface Mount
Voltage3V ~ 3.6V
Frequency1.2GHz
Operating temperature-40°C~85°C
PLLYes
InputLVCMOS, Crystal
OutputLVDS, LVPECL
PackageTape & Reel (TR)
Case24-VFQFN Exposed Pad
Divider (Multiplier)Yes/No
Number of circuits1
Ratio - Input:Output1:1
Differential - Input:OutputNo/Yes

Product details

1.2 GHz PLL clock generator — what it delivers

The Texas Instruments CDCE421RGERG4 is a single-circuit PLL-based clock generator that accepts LVCMOS or crystal inputs and delivers differential LVDS or LVPECL outputs up to 1.2 GHz. The 1:1 input-to-output ratio means it synthesises a clean high-frequency clock from a lower-frequency reference — typical use is generating the serial line rate for gigabit Ethernet, Fibre Channel, or RF local-oscillator chains.

Obsolete — sourcing reality

This part carries an obsolete product status.

Package and footprint check

Housed in a 24-VQFN with exposed pad (4 mm x 4 mm), this is a surface-mount part with a centre thermal pad.

Frequently asked questions

Is CDCE421RGERG4 obsolete?

Yes, the product status is listed as obsolete. Texas Instruments no longer manufactures this device. For existing designs, we can source it through independent channels against an RFQ; for new designs, evaluate current TI clock generators with similar PLL and output capabilities.

Does CDCE421RGERG4 support LVDS and LVPECL outputs?

Yes, the output type is listed as both LVDS and LVPECL. The differential outputs can be configured for either standard, which covers the two most common high-speed differential clock interfaces without external level translation.

What is the maximum output frequency of CDCE421RGERG4?

The maximum output frequency is 1.2 GHz, making it suitable for generating high-speed serial clocks in applications such as gigabit Ethernet, Fibre Channel, and RF LO generation.