Datasheet

   
  
  
SDLS213B − DECEMBER 1983 − REVISED NOVEMBER 2004
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
schematics of inputs and outputs
V
CC
R
eq
Input
V
CC
100 Ω NOM
Output
EQUIVALENT OF EACH INPUT TYPICAL OF ALL OUTPUTS
SN54/74221
SN54/74LS221
EQUIVALENT OF EACH INPUT TYPICAL OF ALL OUTPUTS
V
CC
R
eq
Input
V
CC
Output
120 Ω NOM
A Input: R
eq
= 4 kΩ NOM
B, CLR
Input: R
eq
= 2 kΩ NOM
A Input: R
eq
= 25 kΩ NOM
B Input: R
eq
= 15.4 kΩ NOM
CLR
: R
eq
= 12.5 kΩ NOM