LC7458B-04

The LC7458B-04 is designed as one kind of 8K-byte ROM-contained single chip 4-bit microcomputers with FLT / LED drivers, comparator input. This device have 57 pins for ports - 28 pins for 7 input / output common ports, 21 pins for 6 output ports, and 8 pins for 2 input ports. This device has specific ports that are used to provide the interrupt function, 4-bit / 8-bit serial input / output function and burst pulse output function. Each of the 28 pins for input / output common ports contains a driver with a withstand voltage of 15 V max. and a drive current of 15 mA max. and each of the 21 pins for output ports contains a high-voltage output driver of the P-channel open drain type.

Features of the LC7458B-04 are:(1)instruction set with 81 instructions (common to the LC6500 series);(2)on-chip 8129-byte ROM, 1024-bit RAM;(3)serial input / output interface x 1 (4 bits / 8 bits program-selectable);(4)I/O ports: 57 pins in all;(5)4-channel comparator input;(6)4-channel external interrupt input (1 vector);(7)supply voltage: 4 to 6 V (D version) and 4.5 to 6 V (H version).

The absolute maximum ratings of the LC7458B-04 can be summarized as:(1)maximum supply voltage: -0.3 to +7.0 V;(2)output voltage: allowable up to voltage V;(3)input voltage: -0.3 to +15 V;(4)operating temperature: -30 to +70 ;(5)storage temperature: -55 to +125 . If you want to know more information such as the electrical characteristics about the LC7458B-04, please download the datasheet in www.seekic.com or www.chinaicmart.com .