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74LVC240APW bảng dữ liệu(PDF) 6 Page - NXP Semiconductors

tên linh kiện 74LVC240APW
Giải thích chi tiết về linh kiện  Octal buffer/line driver with 5-volt tolerant inputs/outputs; inverting 3-State
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nhà sản xuất  PHILIPS [NXP Semiconductors]
Trang chủ  http://www.nxp.com
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74LVC240APW bảng dữ liệu(HTML) 6 Page - NXP Semiconductors

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Philips Semiconductors
Product specification
74LVC240A
Octal buffer/line driver with 5-volt
tolerant inputs/outputs; inverting (3-State)
1998 May 20
6
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
INPUTS
VM
tPHL
tPLH
VOL
VI
VM
GND
VOH
OUTPUTS
SW00221
Waveform 1. Inputs (1An, 2An) to outputs (1Yn, 2Yn)
propagation delays.
SV00613
outputs
disabled
outputs
enabled
outputs
enabled
tPHZ
tPZH
tPZL
tPLZ
Qn OUTPUT
HIGH-to-OFF
OFF-to-HIGH
Qn OUTPUT
LOW-to-OFF
OFF-to-LOW
VM
VM
nOE INPUT
VX
VOL
VOH
VY
GND
GND
VCC
VI
VM
Waveform 2. 3-State enable and disable times.
TEST CIRCUIT
PULSE
GENERATOR
RT
VIN
D.U.T.
VOUT
50pF
VCC
SWITCH POSITION
TEST
SWITCH
tPLH/tPHL
Open
tPLZ/tPZL
2
<VCC
tPHZ/tPZH
GND
Test Circuit for 3-State Outputs
Open
GND
S1
2
<VCC
DEFINITIONS
VCC
t 2.7V
2.7 – 3.6V
VI
VCC
2.7V
RT = Termination resistance should be equal to ZOUT
of pulse generators.
SW00233
500
Ω
500
Ω
Waveform 3. Load circuitry for switching times.



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