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STANDARD MICROSYSTEMS CORPORATION
COM 5026 cOM5026T
Baud Rate Generator
Programmable Divider
FEATURES
o On chip crystal oscillator or external frequency input
o Choice of 16 output frequencies
016 asynchronous/synchronous baud rates
o Direct UART/USRT/ ASTRO/USYNRT compatibility
o TTL, MOS compatibility
PIN CONFIGURATION
XTAL/EXT1 11 XTAL/EXT2 21
+5v 31 NC 41 GND 51
NC 61 + 12v 71
"-/
14 tOUT 13 A 12 B 11 C 10 0 9 ST 8 NC
I
BLOCK DIAGRAM
A REPROGRAMMABLE B FREQUENCY SELECT
C D ROM
XTALlEXTl XTALlEXT2
XTAL
~ ~----------~ CLOCK
BUFFER
DIVIDER
fOUT
~ AA
+5V ,GND +12V
169
GENERAL DESCRIPTION
The Standard Microsystems COM 5026 Baud Rate Generator/Programmable Divider is an N-channel COPLAMOS~ MaS/LSI device which, from a single crystal (on-chip oscillator) or input frequency is