Electronic Products & Technology

4-8-Bit monolithic programmable delay lines boost versatility

Stephen Law   

Semiconductors CMOS data delay digitally Lines monolithic programmable semiconductors

DATA DELAY DEVICES 4- and 8-Bit monolithic digitally programmable delay Lines are used in medical imaging, industrial, aerospace and other timing-critical applications. The 8-bit lines are available with step sizes ranging from 50ps through 20ns, and a quad 4-bit line with step sizes from 1ns through 400ns. Devices use all-silicon, CMOS technology and are vapor-phase, IR and wave solderable. Temperature stability is typically ±1.5% (-40°C to 85°C).

The 4-bit 3D3424 and 3D7424 devices have four independent programmable lines on one chip and have a low quiescent current (5mA typical). They also both have delay tolerance of 3% or 2ns, line-to-line matching of 1% or 1ns typical and a minimum input pulse width of 10% of total delay. The 3D3424 has is available in steps sizes of 1ns through 300ns and has a Vdd stability of ±0.5% typical (3.0V to 3.6V), while the 3D7424 step size range is 0.75ns through 400ns with a typical Vdd stability of ±0.5% (4.75V to 5.25V).

The 8-bit 3D3428, 3D3438, 3D7428 and 3D7438 are programmable via serial or parallel interface and have a delay tolerance of 0.5% and typical supply currents of 2mA or 3mA. The 3D3428 and 3D3438 have 3.3V CMOS compatible inputs and outputs while the other two have TTL/CMOS compatible inputs and outputs.

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