Datasheet

SN54LS240, SN54LS241, SN54LS244, SN54S240, SN54S241, SN54S244
SN74LS240, SN74LS241, SN74LS244, SN74S240, SN74S241, SN74S244
OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS
SDLS144C − APRIL 1985 − REVISED MAY 2010
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
schematics of inputs and outputs
R
V
CC
Output
TYPICAL OF ALL OUTPUTS
Req
V
CC
Input
EQUIVALENT OF EACH INPUT
EQUIVALENT OF EACH INPUT
9 kΩ NOM
Input
V
CC
’LS240. ’LS241, ’LS244: R = 50 Ω NOM
’S240, ‘S241, S244: R = 25 Ω NOM
GND
G and G inputs: R
eq
= 2 kΩ NOM
A inputs: R
eq
= 2.8 kΩ NOM
’LS240, ’LS241, ’LS244
’S240, ’S241, ’S244