RF5C67

The RF5C67 is a kind of filter IC that performs 5*5 elements two-dimension filtering. There are two methods of data input available: serial mode, that enters one data item for each line in main scanning direction; and odd-even mode, that enters two data items (odd and even) for each line. Operation speed is 20 MHz, enabling fast image processing: 50 ns/element in serial mode and 25 ns/element in odd-even mode. Input element data is a 6-bit absolute value, and the filter coefficient is signed 7-bit absolute two's compliment. The typical applications include digital copiers, CT scanners, raders, and other devices.

There are some features of RF5C67 as follows: (1)5*5 elements two-dimension filter; (2)operation speed: 40 MHz max (two ICs): odd/even mode and 20 MHz max. (one IC): serial mode; (3)filter coefficient: 7 bits (signal binary); (4)image data: 6 btis (absolute values); (5)overflow/underflow terminal; (6)image element output enable terminals; (7)8-bit and 16-bit CPU interface (coefficient setting); (8)silicon gate CMOS process; (9)5 V single power supply; (10)100-pin flat package.

The following is about the absolute maximum ratings of RF5C67: (1)VCC, supply voltage: -0.3 to 7 V when GND=0 V; (2)VTE, terminal voltage: -0.3 to VCC+0.3 V when GND=0 V; (3)PD, power dissipation: 700 mW; (4)Topr, operating ambient temperature: 0 to 70; (5)Tstg, storage temperature: -40 to 125.

The last one is about the DC electrical characteristics of RF5C67: (1)VIH, "H" input voltage: 2.2 V min and VCC+0.3 V max; (2)VIL, "L" input voltage: -0.3 V min and 0.8 V max; (3)ILI, input leakage current: ±10A when 0VIVCC; (4)VOH, "H" output voltage: 2.4 V min at IOH=-4.0 mA; (5)VOL, "L" output voltage: 0.4 V max at IOL=4.0 mA.