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PDF HD74HC240 Data sheet ( Hoja de datos )
| Número de pieza | HD74HC240 | |
| Descripción | Octal Buffers/Line Drivers/Line Receivers | |
| Fabricantes | Renesas | |
| Logotipo |  |
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HD74HC240
Octal Buffers/Line Drivers/Line Receivers
(with inverted 3-state outputs)
REJ03D0594–0200
(Previous ADE-205-471)
Rev.2.00
Jan 31, 2006
Description
The HD74HC240 is an inverting buffer and has two active low enables (1G and 2G). Each enable independently
controls 4 buffers. This device does not have schmitt trigger inputs.
Features
• High Speed Operation: tpd = 10 ns typ (CL = 50 pF)
• High Output Current: Fanout of 15 LSTTL Loads
• Wide Operating Voltage: VCC = 2 to 6 V
• Low Input Current: 1 µA max
• Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)
• Ordering Information
Part Name
Package Type
Package Code
(Previous Code)
Package
Abbreviation
HD74HC240P
DILP-20 pin
PRDP0020AC-B
(DP-20NEV)
P
HD74HC240FPEL SOP-20 pin (JEITA)
PRSP0020DD-B
(FP-20DAV)
FP
HD74HC240RPEL SOP-20 pin (JEDEC)
PRSP0020DC-A RP
(FP-20DBV)
HD74HC240TELL TSSOP-20 pin
PTSP0020JB-A
(TTP-20DAV)
T
Note: Please consult the sales office for the above package availability.
Taping Abbreviation
(Quantity)
—
EL (2,000 pcs/reel)
EL (1,000 pcs/reel)
ELL (2,000 pcs/reel)
Function Table
Inputs
G
H
L
L
H : high level
L : low level
X : irrelevant
Z : off (high-impedance) state of a 3-state output
A
X
H
L
Output
Y
Z
L
H
Rev.2.00 Jan 31, 2006 page 1 of 7
1 page  
HD74HC240
Test Circuit
VCC
Input
Pulse Generator
Zout = 50 Ω
VCC
1G, 2G
Output
1Y1 to 2Y4
1A1 to 2A4
1 k Ω S1
CL =
50 pF
OPEN
GND
VCC
Note : 1. CL includes probe and jig capacitance.
TEST
tPLH / t PHL
tZH/ t HZ
tZL / t LZ
S1
OPEN
GND
VCC
Waveforms
• Waveform – 1
Input A
Output Y
tf
90 %
50 %
10 %
tPLH
tr
10 %
90 %
50 %
tPHL
50 %
10 %
90 %
tTLH
90 %
50 %
10 %
tTHL
VCC
0V
VOH
VOL
• Waveform – 2
tf
90 %
Input G
50 %
10 %
tZL
tr
10 %
90 %
50 %
tLZ
Waveform – A
Waveform – B
50 %
tZH
50 %
10 %
tHZ
90 %
VCC
0V
VOH
VOL
VOH
VOL
Notes : 1. Input waveform : PRR ≤ 1 MHz, duty cycle 50%, tr ≤ 6 ns, tf ≤ 6 ns
2. Waveform– A is for an output with internal conditions such that the
output is low except when disabled by the output control.
3. Waveform– B is for an output with internal conditions such that the
output is high except when disabled by the output control.
4. The output are measured one at a time with one transition per measurement.
Rev.2.00 Jan 31, 2006 page 5 of 7
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet HD74HC240.PDF ] | |
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