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74LV373 Folha de dados(PDF) 7 Page - NXP Semiconductors

Nome de Peças 74LV373
Descrição Electrónicos  Octal D-type transparent latch 3-State
Download  12 Pages
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Fabricante Electrônico  PHILIPS [NXP Semiconductors]
Página de início  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74LV373 Folha de dados(HTML) 7 Page - NXP Semiconductors

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Philips Semiconductors
Product specification
74LV373
Octal D-type transparent latch (3-State)
1998 Jun 10
7
AC WAVEFORMS
VM = 1.5V at VCC w 2.7V and v 3.6V
VM = 0.5V * VCC at VCC t 2.7V and w 4.5V
VOL and VOH are the typical output voltage drop that occur with the
output load.
VX = VOL + 0.3V at VCC w 2.7V and v 3.6V
VX = VOL + 0.1VCC at VCC < 2.7V and w 4.5V
VY = VOH – 0.3V at VCC w 2.7V and v 3.6V
VY = VOH – 0.1VCC at VCC < 2.7V and w 4.5V
SV00662
VM
Dn INPUT
GND
VOH
VOL
VI
Qn OUTPUT
VM
tPLH
tPHL
Figure 1. Data input (Dn) to output (Qn) propagation delays and
the output transition times.
SV00663
VM
LE INPUT
VOL
GND
VOH
VI
Qn OUTPUT
VM
tPLH
tPHL
tW
Figure 2. Latch enable input (LE) pulse width, the latch enable
input to output (Qn) propagation delays
and the output transition times.
SV00664
outputs
disabled
outputs
enabled
outputs
enabled
tPHZ
tPZH
tPZL
tPLZ
VX
VY
VM
VM
VM
OE INPUT
VI
VCC
VOL
VOH
GND
GND
Qn OUTPUT
LOW-to-OFF
OFF-to-LOW
Qn OUTPUT
HIGH-to-OFF
OFF-to-HIGH
Figure 3. 3-State enable and disable times.
SV00665
VM
Dn INPUT
LE INPUT
GND
GND
VI
VI
VM
tsu
tsu
th
th
NOTE: The shaded areas indicate when the input is permitted
to change for predictable output performance.
Figure 4. Data set-up and hold times
for the Dn input to the LE input.
TEST CIRCUIT
SWITCH POSITION
PULSE
GENERATOR
RT
VI
D.U.T.
VO
CL
RL = 1k
VCC
Test Circuit for Outputs
DEFINITIONS
VCC
VI
< 2.7V
VCC
TEST
tPLH/tPHL
RT = Termination resistance should be equal to ZOUT of pulse generators.
2.7V
2.7–3.6V
w 4.5V
VCC
50 pF
SV00896
S1
tPLZ/tPZL
tPHZ/tPZH
Open
2 * VCC
GND
RL = 1k
Open
2 * VCC
GND
RL = Load resistor
CL = Load capacitance includes jig and probe capacitiance.
Figure 5. Load circuitry for switching times


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