74LCX540_06 Datasheet, PDF (6/14 Pages) Fairchild Semiconductor – Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs

AC Loading and Waveforms (Generic for LCX Family)
TEST
SIGNAL
VCC
DUT
500Ω
CL
500Ω
OPEN
GND
V_I
tPLH, tPHL
tPZH, tPHZ
tPZL, tPLZ
Figure 1. AC Test Circuit (C_L includes probe and jig capacitance)
Test
t_PLH, t_PHL
t_PZL, t_PLZ
t_PZH, t_PHZ
Switch
Open
6V at V_CC = 3.3 ± 0.3V
V_CC x 2 at V_CC = 2.5 ± 0.2V
GND
DATA
IN
t_pxx
DATA
OUT
Vmi
tpxx
VCC
GND
Vmo
Waveform for Inverting and
Non-Inverting Functions
CONTROL
IN
CLOCK
OUTPUT
tW
tPHL
Vmo
Vmi
trec
VCC
GND
Vmi
tPLH
Vmo
Propagation Delay, Pulse Width and
t_rec Waveforms
OUTPUT
CONTROL
tPZL
DATA
OUT
Vmi
tPLZ
Vmo
VCC
GND
VX
VOL
3-STATE Output Low Enable and
Disable Times for Logic
OUTPUT
CONTROL
DATA
OUT
t_PZH
Vmi
tPHZ
Vmo
VCC
GND
VOH
VY
3-STATE Output High Enable and
Disable Times for Logic
DATA
IN
CONTROL
INPUT
MR
OR
CLEAR
t_S
tS _trec
Vmi ^VCC
GND
tH
VCC
Vmi
GND
Vmi
Setup Time, Hold Time and
Recovery Time for Logic
tr
tf
ANY
OUTPUT
90%
10%
90%
10%
VOH
VOL
t_rise and t_fall
Figure 2. Waveforms (Input Characteristics; f = 1MHz, t_r = t_f = 3ns)
Symbol 3.3V ± 0.3V
V_CC
2.7V
2.5V ± 0.2V
V_mi
1.5V
1.5V
V_CC / 2
V_mo
1.5V
1.5V
V_CC / 2
V_x
V_OL + 0.3V
V_OL + 0.3V
V_OL + 0.15V
V_y
V_OH − 0.3V
V_OH − 0.3V
V_OH − 0.15V
6
74LCX540 Rev. 1.0.0
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