SN54LS240, SN54LS241, SN54LS244, SN54S240, SN54S241, SN54S244
SN74LS240, SN74LS241, SN74LS244, SN74S240, SN74S241, SN74S244
OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS
SDLS144B – APRIL 1985 – REVISED FEBRUARY 2002
schematics of inputs and outputs
’LS240, ’LS241, ’LS244
EQUIVALENT OF EACH INPUT
VCC
9 kΩ NOM
’S240, ’S241, ’S244
EQUIVALENT OF EACH INPUT
VCC
Req
Input
Input
G and G inputs: Req = 2 kΩ NOM
A inputs: Req = 2.8 kΩ NOM
TYPICAL OF ALL OUTPUTS
VCC
R
Output
GND
’LS240. ’LS241, ’LS244: R = 50
Ω
NOM
’S240, ‘S241, S244: R = 25
Ω
NOM
4
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DALLAS, TEXAS 75265