74LVC27 데이터 시트보기 (PDF) - Philips Electronics
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74LVC27 Datasheet PDF : 10 Pages
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Philips Semiconductors
Triple 3-input NOR gate
Product specification
74LVC27
AC CHARACTERISTICS
GND = 0 V; tr = tf v 2.5 ns; CL = 50 pF; RL = 500W; Tamb = –40_C to +85_C
SYMBOL
PARAMETER
WAVEFORM
tPHL/
tPLH
Propagation delay
nA, nB, nC to nY
Figure 1, 2
NOTE:
1. These typical values are at VCC = 3.3V and Tamb = 25°C.
LIMITS
VCC = 3.3V ±0.3V
MIN
TYP1
MAX
–
3.4
5.9
VCC = 2.7V
MIN
MAX
–
7.0
UNIT
ns
AC WAVEFORMS
VM = 1.5 V at VCC w 2.7 V
VM = 0.5 S VCC at VCC < 2.7 V
VOL and VOH are the typical output voltage drop that occur with the
output load.
VI
nA, nB, nC
INPUT
GND
VOH
VM
t PHL
t PLH
nY OUTPUT
VM
VOL
SV00420
Figure 1. Input (nA, nB, nC) to output (nY) propagation delays.
TEST CIRCUIT
PULSE
GENERATOR
VI
RT
VCC
D.U.T.
S1
2 * VCC
Open
GND
500Ω
VO
50pF
CL
500Ω
SWITCH POSITION
TEST
S1
tPLH/tPHL
Open
VCC
< 2.7V
2.7–3.6V
VI
VCC
2.7V
SV00903
Figure 2. Load circuitry for switching times.
1998 Apr 28
5
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