Programmable Counter
www.DataSheet4U.com
74F525 Programmable Counter
August 1995
74F525 Programmable Counter
General Description
The ’F525...
Description
www.DataSheet4U.com
74F525 Programmable Counter
August 1995
74F525 Programmable Counter
General Description
The ’F525 is a multi-function 28-pin device It consists of a 16-bit count-down counter logic to control the counter logic to control the state of the outputs and a PLA to decode the particular function selected by the user The list of highspeed timing applications include
Features
Y Y Y Y Y Y Y
Baud rate generator Digitally programmed monostable Variable system frequency generator Digital filter variable sampling rate 16-bit data path External trigger Extremely accurate one shot w pulse widths from 50 ns to 3 27 ms CP e 40 MHz
Commercial 74F525QC (Note 1) 74F525SC (Note 1) 74F525PC
Package Number V28A M28B N28B
Package Description 28-Lead Molded Plastic Leaded Chip Carrier 28-Lead (0 300 Wide) Molded Small Outline JEDEC 28-Lead (0 600 Wide) Molded Dual-In-Line Package
Note 1 Devices also available in 13 reel Use suffix e SCX and QCX
Connection Diagrams
Pin Assignment DIP and SOIC Pin Assignment for PCC
TL F 9547 – 3
TL F 9547 – 2
TRI-STATE is a registered trademark of National Semiconductor Corporation C1995 National Semiconductor Corporation TL F 9547 RRD-B30M105 Printed in U S A
Logic Symbol
TL F 9547 – 1
Unit Loading Fan Out
74F Pin Names Description UL HIGH LOW 50 33 3 50 33 3 10 10 10 10 10 20 10 10 10 10 10 20 10 10 Input IIH IIL Output IOH IOL
b 1 mA 20 mA b 1 mA 20 mA 20 mA b0 6 mA 20 mA b0 6 mA 20 mA b1 2 mA 20 mA b0 6 mA 20 mA b0 6 mA 20 mA b1 ...
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