32R104

The SSI 32R104 time base generator provides a programmable reference generator,channel filter control and data rate control for constant density recording applications.It is optimized to operate with the 32D53xx series data separators and contains a high performance programmable PLL for 1% reference frequency control.A 7-bit DAC is provided to program the IREF current which sets the data separator PLL operating center frequency.A 7-bit DAC is provided to program the hysteresis level in the SSI 32P3000 series pulse detectors.Two additional 7-bit DACs are provided for programmable electronic filter control,A single latched TTL output is provided to control filter multiplexers,A serial microprocessor interface reduces pin count andprovides convenient access to the internal program storage registers,The 32R104 only requires a +5V supply and will be available in 24-lead SOL packages.

Features of 32R104 can be summerized as:(1)for constant denslty recording applications;(2)reference frequency control;(3)channel filter control;(4)internal DAC available to program data separator data rate(DACI);(5)internal DAC available to program pluse detector hysteresis(DACP);(6)up to 72 MHz operation;(7)1% frequency resolution;(8)no external active components required;(9)+5V only operation;(10)low power mode;(11)24-lead SOL package.

Absolute maximum ratings of this part are:(1)storage temperature:-65 to +150;(2)junction operating temperature,Tj:+150;(3)supply voltage,VCA,VCB,VCD:-0.5 to 7V;(4)voltage applied to logic input:-0.5 to 5.5 V.