74LCX374_08 Datasheet, PDF (7/15 Pages) Fairchild Semiconductor – 74LCX374 Low Voltage Octal D-Type Flip-Flop with 5V Tolerant Inputs and Outputs

AC Loading and Waveforms (Generic for LCX Family)
TEST
SIGNAL
V_CC
DUT
500Ω
C_L
500Ω
OPEN
GND
V_I
t_PLH, t_PHL
t_PZH, t_PHZ
t_PZL, t_PLZ
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
OUTPUT
CONTROL
DATA
OUT
tPZH
Vmi
tPHZ
Vmo
VCC
GND
VOH
VY
Waveform for Inverting and
Non-Inverting Functions
3-STATE Output High Enable and
Disable Times for Logic
CONTROL
IN
CLOCK
OUTPUT
tW
tPHL
Vmo
Vmi
trec
VCC
GND
Vmi
tPLH
Vmo
DATA
IN
CONTROL
INPUT
MR
OR
CLEAR
t_S
tS _trec
Vmi ^VCC
GND
tH
VCC
Vmi
GND
Vmi
Propagation Delay. Pulse Width and
t_rec Waveforms
OUTPUT
CONTROL
t_PZL
DATA
OUT
Vmi
tPLZ
Vmo
VCC
GND
VX
VOL
Setup Time, Hold Time and
Recovery Time for Logic
tr
tf
ANY
OUTPUT
90%
10%
90%
10%
VOH
VOL
3-STATE Output Low Enable and
Disable Times for Logic
t_rise and t_fall
Figure 2. Waveforms (Input Characteristics; f =1MHz, t_r = t_f = 3ns)
Symbol
V_mi
V_mo
V_x
V_y
3.3V ± 0.3V
1.5V
1.5V
V_OL + 0.3V
V_OH – 0.3V
V_CC
2.7V
1.5V
1.5V
V_OL + 0.3V
V_OH – 0.3V
2.5V ± 0.2V
V_CC / 2
V_CC / 2
V_OL + 0.15V
V_OH – 0.15V
©2006 Fairchild Semiconductor Corporation
74LCX374 Rev. 1.6.0
7
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