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

4

POST OFFICE BOX 655303

schematics of inputs and outputs

R

VCC

Output

TYPICAL OF ALL OUTPUTS

Req

VCC

Input

EQUIVALENT OF EACH INPUT

EQUIVALENT OF EACH INPUT

9 k

Ω NOM

Input

VCC

’LS240. ’LS241, ’LS244: R = 50

Ω NOM

’S240, ‘S241, S244: R = 25

Ω NOM

GND

G and G inputs: Req = 2 kΩ NOM

A inputs: Req = 2.8 kΩ NOM

’LS240, ’LS241, ’LS244

’S240, ’S241, ’S244