74ALS273 查看數據表（PDF） - Philips Electronics
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74ALS273 Datasheet PDF : 9 Pages
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Philips Semiconductors
Octal D-type flip-flop
Product specification
74ALS273
AC WAVEFORMS
For all waveforms, VM = 1.3V.
1/fmax
CP VM
tw(H)
tPHL
VM
tw(L)
VM
tPLH
Qn
VM
VM
SF00294
Waveform 1. Propagation Delay for Clock Input to Output,
Clock Pulse Width, and Maximum Clock Frequency
Dn
VM
VM
tsu(H) th(H)
VM
VM
tsu(L) th(L)
CP
VM
VM
SC00064
Waveform 3. Data Setup and Hold Times
MR
VM
tw(L)
CP
tPHL
VM
tREC
VM
Qn
VM
SC00065
Waveform 2. Master Reset Pulse Width, Master Reset to
Output Delay, and Master Reset to Clock Recovery Time
TEST CIRCUIT AND WAVEFORMS
VIN
PULSE
GENERATOR
VCC
VOUT
D.U.T.
90%
NEGATIVE
PULSE
tw
VM
10%
tTHL (tff)
VM
10%
tTLH (tr )
90%
AMP (V)
0.3V
RT
CL RL
Test Circuit for Totem-pole Outputs
POSITIVE
PULSE
10%
tTLH (tr )
90%
VM
tw
tTHL (tf )
90%
VM
AMP (V)
10%
0.3V
DEFINITIONS:
RL = Load resistor;
see AC electrical characteristics for value.
CL = Load capacitance includes jig and probe capacitance;
see AC electrical characteristics for value.
RT = Termination resistance should be equal to ZOUT of
pulse generators.
Input Pulse Definition
INPUT PULSE REQUIREMENTS
Family
Amplitude VM Rep.Rate tw tTLH
74ALS 3.5V 1.3V 1MHz 500ns 2.0ns
tTHL
2.0ns
SC00005
1991 Feb 08
5
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