DM74185A

Specifications

Supply Voltage                                                                          7V
Input Voltage                                                                         5.5V
Output Voltage                                                                         7V
Operating Free Air Temperature
Range                                                                       0 to +70
Storage Temperature Range                               -65 to +150



Description

  These DM74185A monolithic converters are derived from the 256-bit read only memories, DM5488, and DM7488. Emitter connections are made to provide direct read-out of converted codes at outputs Y8 through Y1, as shown in the function tables. These DM74185A converters demonstrate the versatility of a read only memory in that an unlimited number of reference tables or conversion tables may be built into a system. Both of these DM74185A converters comprehend that the least significant bits (LSB) of the binary and BCD codes are logically equal,and in each case the LSB bypasses the converter as illustrated in the typical applications. This means that a 6-bit converter is produced in each case. Both devices are cascadable to N bits

   An overriding enable input is provided on each DM74185A converter which when taken high inhibits the function, causing all outputs to go high. For this reason, and to minimize power consumption, unused outputs Y7 and Y8 of the 185A and all ``don't care'' conditions of the 184 are programmed high.The outputs are of the open-collector type