COM8046T

STANDARD MICROSYSTEMS CORPORATION COM 8046 cOM8046T Baud Rate Generator Programmable Divider FEATURES o On chip crystal oscillator or external frequency input o Single + 5v power supply o Choice of 32 output frequencies o 32 asynchronousl synchronous baud rates o Direct UARTIUSRTI ASTRO/USYNRT compatibility ORe-programmable ROM via CLASp® technology allows generation of other frequencies o TTL, MOS compatible o 1X Clock via fol 16 output o Crystal frequency output via fx and fxl 4 outputs o Output disable via FENA PIN CONFIGURATION XTALlEXT1 1 I XTALlEXT2 2 +5v 3 fx 4 GND 51 fo/16 61 FENA 71 E 81 \..J )16 fo 15 A 14 B 13 C 12 D 11 ST 10 fx/4 9 NC ST~--' A B C D E BLOCK DIAGRAM REPROGRAM MABLE FREQUENCY SELECT DIVIDER ROM I XTALlEXT1 XTALlEXT2 DIVIDER FENA~------------------------------4------------------------------------------------------------------~----------~ A ,l +5v GND 10 10/16 fx fx/4 179 General Description The Standard Microsystems COM 8046 is an enhanced version of the COM 5046 Baud Rate Generator. It is fabricated using SMC's patented COPLAMOS® and CLASp® technologies and employs depletion mode loads, allowing operation ·from a single +5v supply. The standard COM 8046 is specifically dedicated to generating the full spectrum of 16 asynchronousl synchronous data communication frequencies for 1X, 16X and 32X UARTI USRTI ASTRal USYNRT devices. The COM 8046 features an internal crystal oscillator which may be used to provide the master reference frequ...