74LVC374A 데이터 시트보기 (PDF) - Philips Electronics
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74LVC374A
Philips Electronics
74LVC374A Datasheet PDF : 12 Pages
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Philips Semiconductors
Octal D-type flip-flop with 5-volt tolerant
inputs/outputs; positive edge-trigger (3-State)
Product specification
74LVC374A
AC WAVEFORMS
VM = 1.5V at VCC w 2.7V; VM = 0.5 VCC at VCC t 2.7V.
VOL and VOH are the typical output voltage drop that occur with the
output load.
VX = VOL + 0.3V at VCC w 2.7V; VX = VOL + 0.1 VCC at VCC t 2.7V
VY = VOH –0.3V at VCC w 2.7V; VY = VOH – 0.1 VCC at VCC t 2.7V
VI
CP INPUT
GND
VOH
Qn OUTPUT
VOL
1/fmax
VM
VM
tw
tPHL
VM
VM
tPLH
VM
SA00394
Waveform 1. Clock (CP) to output (Qn) propagation delays, the
clock pulse width, output transition times and the maximum
clock pulse frequency.
VI
CP
INPUT
VM
GND
tsu
tsu
VI
ÉÉÉÉ Dn
INPUT
VM
ÉÉÉÉÉÉÉÉ GND
ÉÉÉth ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉth ÉÉÉ
VOH
Qn
OUTPUT
VM
VOL
NOTE: The shaded areas indicate when the input is permitted to change
for predictable output performance.
SW00107
Waveform 2. Data setup and hold times for the Dn input to the
CP input.
VI
nOE INPUT
VM
GND
VCC
Qn OUTPUT
LOW-to-OFF
OFF-to-LOW
VOL
VOH
Qn OUTPUT
HIGH-to-OFF
OFF-to-HIGH
GND
tPLZ
tPZL
VX
tPHZ
VY
tPZH
outputs
enabled
outputs
disabled
Waveform 3. 3-State enable and disable times.
VM
VM
outputs
enabled
SW00207
TEST CIRCUIT
PULSE
VI
GENERATOR
VCC
D.U.T.
RT
VO
CL 50pF
S1
500Ω
2 x VCC
Open
GND
500Ω
VCC
t 2.7V
2.7V – 3.6V
VI
VCC
2.7V
Test
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
S1
Open
2 x VCC
GND
SY00003
Waveform 4. Load circuitry for switching times.
1998 Jul 29
7
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