TECHNICAL DATA
Octal Buffer /Line Driver NINV (3-state)
IN74VHCT244 is high-speed logic IC made by CMOS
technology and designed for use in high-performance
calculating systems with a wide supply voltage range.
As for operation speed, IN74VHCT244 can be compared
with equivalent bipolar ICs based on Schottky TTL and two
times surpasses ICs of IN74НС series.
IN74VHCT244 tolerates operation under conditions
when voltage on input & output is exceeded up to 7V
without affecting characteristics and IC reliability. This
possibility allows to use IN74VHCT244 in radio-electronic
devices for interfacing with supply voltages 5V and 3V,
eliminate IC failure under supply voltage source emergency
outage.
Use of output edge shaping block in the microcircuit
allows to reduce noise amplitude of noises when switching
outputs into the same state simultaneously.
Input levels of IN74VHCT244 are compatible with TTL
level and output levels with CMOS levels.
IN74VHCT244
ORDERING INFORMATION
IN74VHCT244N Plastic
IN74VHCT244DW SOIC
T
A
= -40° to 85° C for all packages
Features:
•
Supply voltage range 4.5 to 5.5 V.
•
Output current 8 mA.
•
Low consumption current: 0.2 mkA (typical value) at
Та
= 25
°С.
•
Latchup current not less than 300 mA at
Та
= 85
°С.
•
Tolerable value of static potential not less than 2000 V as per human body model
(HBM) and not less than 200 V as per machine model (ММ).
•
Ambient operation temperature minus 40 to plus 85
°С.
•
Balanced signal propagation delay.
•
Ensures voltage exceeding mode on input
•
Low noise level at the simultaneous switching of outputs in the same state:
V
OLP
= 0.8 V (max).
•
For pins and functions, compatible with IN74HCT244.
.
1
IN74VHCT244
Absolute maximum conditions*
Parameter, unit
Supply voltage, V
Input voltage, V
Output voltage, V
Output voltage, V
Input diode current, mA
Current of common output and supply
output, mA
Output current, mA
Output diode current, mA
Dissipated power, mW
Symbol
V
CC
Vin
Vout
Vout1
Iik
Icc
Iout
Iok
Pd
min
-0.5
-0.5
-0.5
-0.5
-
Value
max
7.0
7.0
V
CC
+ 0.5B
7.0
-20
±75
±25
±20
180
*Under absolute maximum conditions operation of microcircuit is not guaranteed. Operation is
guaranteed under maximum conditions
Maximum conditions
Parameter, unit
Symbol
min
4.5
0
0
0
-
0
Value
max
5.5
V
CC
V
CC
5.5*
±8.0
20
Supply voltage, V
Input voltage,V
Output voltage, V
Output voltage, V
Output current, mA
Input rise and fall time, ns/V
* - Outputs in the third state
V
CC
Vin
Vout
Vout1
Iout
t
LH
, t
HL
3
IN74VHCT244
AC electrical characteristics
(t
LH
= t
HL
= 3.0 ns)
Value
Symbol
Parameter
Test conditions
V
CC
, V
C
L
,
pF
25
°C
min
–
–
–
max
7.4
8.4
11.4
–40
to 85
°C
min max
–
8.5
–
9.5
–
13.0
Unit
ns
ns
t
PHL
, t
PLH
Propagation delay time Fig 1
when switching "on",
"off"
t
PHZ
, t
PLZ
Propagation delay time Fig 2
under transition from
high , low level into "off"
state
t
PZH
, t
PZL
Propagation delay time Fig 2
under transition from
«off» state into high, low
level
delays -
t
OSLH
,
Propagation
between
t
OSHL
difference
outputs
5.0 ± 0.5 15
50
5.0 ± 0.5 50
5.0 ± 0.5 15
50
–
–
10.4
11.4
–
–
12.0
13.0
ns
5.0 ± 0.5 50
–
1.0
–
1.0
ns
Capacitance characteristics
Symbol
C
I
C
O
C
РD
Parameter
Input capacity
Output capacity
Dynamic capacity
Test conditions
-
-
V
I
= 0 V orV
CC
V
CC
, V
5.0
5.0
5.0
Value
25
°C
min
max
10
18
36
Unit
pF
pF
pF
Noise characteristics
(C
L
= 50 pF)
Parameter
Symbol
V
OLP
V
OLV
V
IHD
V
ILD
V
CC
, V
Positive noise of low output voltage
5.0
Negative noise of low output 5.0
voltage
Input dynamic high voltage
Input dynamic low voltage
5.0
5.0
min
-
-1.1
2.0
0.8
Value
max
1.1
-
Unit
V
5
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