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74LVC623AD Scheda tecnica(PDF) 6 Page - NXP Semiconductors

Il numero della parte 74LVC623AD
Spiegazioni elettronici  Octal transceiver with dual enable 3-State
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Produttore elettronici  PHILIPS [NXP Semiconductors]
Homepage  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74LVC623AD Scheda tecnica(HTML) 6 Page - NXP Semiconductors

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Philips Semiconductors
Product specification
74LVC623A
Octal transceiver with dual enable (3-State)
1998 Jul 29
6
AC WAVEFORMS
VM = 1.5V at VCC w 2.7V
VM = 0.5V * VCC at VCC t 2.7V
VOL and VOH are the typical output voltage drop that occur with the
output load.
VX = VOL at 0.3V w 2.7V
VX = VOL + 0.1VCC at VCC < 2.7V
VY = VOH – 0.3V at VCC w 2.7V
VY = VOH – 0.1VCC at VCC < 2.7V
An, Bn
INPUT
VM
tPHL
tPLH
VOL
VI
VM
GND
VOH
An, Bn
OUTPUT
SV00747
Figure 1. Input (An, Bn) to output (Bn, An) propagation delays.
tPLZ
tPZL
VI
OEBA
INPUT
GND
VCC
OUTPUT
LOW-to-OFF
OFF-to-LOW
VOL
VOH
OUTPUT
HIGH-to-OFF
OFF-to-HIGH
GND
outputs
enabled
outputs
enabled
outputs
disabled
tPHZ
VM
VM
VM
tPZH
VX
VY
SV00748
Figure 2. 3-State enable and disable times for OEBA input
tPLZ
tPZL
VI
OEAB
INPUT
GND
VCC
OUTPUT
LOW-to-OFF
OFF-to-LOW
VOL
VOH
OUTPUT
HIGH-to-OFF
OFF-to-HIGH
GND
outputs
enabled
outputs
enabled
outputs
disabled
tPHZ
VM
VM
VM
tPZH
VX
VY
SV00749
Figure 3. 3-State enable and disable times for OEAB input
TEST CIRCUIT
PULSE
GENERATOR
VI
RT
D.U.T.
VO
CL
50pF
S1
2 x VCC
Open
GND
500
500
VCC
VI
t 2.7V
VCC
2.7V – 3.6V
2.7V
Test
S1
GND
tPLZ/tPZL
2 x VCC
tPHZ/tPZH
tPLH/tPHL
Open
SY00003
VCC
Figure 4. Load circuitry for switching times


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