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74VHC244 の電気的特性と機能

74VHC244のメーカーはSTMicroelectronicsです、この部品の機能は「OCTAL BUS BUFFER WITH 3 STATE OUTPUTS NON INVERTED」です。


製品の詳細 ( Datasheet PDF )

部品番号 74VHC244
部品説明 OCTAL BUS BUFFER WITH 3 STATE OUTPUTS NON INVERTED
メーカ STMicroelectronics
ロゴ STMicroelectronics ロゴ 




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74VHC244 Datasheet, 74VHC244 PDF,ピン配置, 機能
® 74VHC244
OCTAL BUS BUFFER
WITH 3 STATE OUTPUTS (NON INVERTED)
s HIGH SPEED: tPD = 3.9 ns (TYP.) at VCC = 5V
s LOW POWER DISSIPATION:
ICC = 4 µA (MAX.) at TA = 25 oC
s HIGH NOISE IMMUNITY:
VNIH = VNIL = 28% VCC (MIN.)
s POWER DOWN PROTECTION ON INPUTS
s SYMMETRICAL OUTPUT IMPEDANCE:
|IOH| = IOL = 8 mA (MIN)
s BALANCED PROPAGATION DELAYS:
tPLH tPHL
s OPERATING VOLTAGE RANGE:
VCC (OPR) = 2V to 5.5V
s PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 244
s IMPROVED LATCH-UP IMMUNITY
s LOW NOISE VOLP = 0.9V (Max.)
DESCRIPTION
The 74VHC244 is an advanced high speed
CMOS OCTAL BUS BUFFER (3-STATE)
fabricated with sub-micron silicon gate and
double-layer metal wiring C2MOS technology.
G output enable governs four BUS BUFFERs.
M
(Micro Package)
T
(TSSOP Package)
ORDER CODES :
74VHC244M
74VHC244T
This device is designed to be used with 3 state
memory address drivers, etc.
Power down protection is provided on all inputs
and 0 to 7V can be accepted on inputs with no
regard to the supply voltage. This device can be
used to interface 5V to 3V.
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
PIN CONNECTION AND IEC LOGIC SYMBOLS
June 1999
1/8

1 Page





74VHC244 pdf, ピン配列
74VHC244
DC SPECIFICATIONS
Symb ol
Parameter
VIH High Level Input
Voltage
VIL Low Level Input
Voltage
VOH High Level Output
Voltage
VOL Low Level Output
Voltage
IOZ High Impedance
Output Leakage
Current
II Input Leakage Current
ICC Quiescent Supply
Current
Test Conditions
V CC
( V)
2.0
3.0 to 5.5
2.0
3.0 to 5.5
2.0
3.0
4.5
3.0
4.5
2.0
3.0
4.5
3.0
4.5
5.5
IO=-50 µA
IO=-50 µA
IO=-50 µA
IO=-4 mA
IO=-8 mA
IO=50 µA
IO=50 µA
IO=50 µA
IO=4 mA
IO=8 mA
VI = VIH orVIL
VO = VCC orGND
0 to 5.5
5.5
VI = 5.5V or GND
VI = VCC orGND
Value
TA = 25 oC
-40 to 85 oC
Min. Typ . Max. Min . Max.
1.5 1.5
0.7VCC
0.7VCC
0.5 0.5
0.3VCC
0.3VCC
1.9 2.0
1.9
2.9 3.0
2.9
4.4 4.5
4.4
2.58 2.48
3.94 3.8
0.0 0.1
0.1
0.0 0.1
0.1
0.0 0.1
0.1
0.36 0.44
0.36 0.44
±0.25
±2.5
Un it
V
V
V
V
µA
±0.1 ±1.0 µA
4 40 µA
AC ELECTRICAL CHARACTERISTICS (Input tr = tf =3 ns)
Symb ol
Parameter
Test Condition
V CC
( V)
CL
(pF)
tPLH Propagation Delay
tPHL Time
3.3(*)
3.3(*)
15
50
5.0(**)
15
5.0(**)
50
tPZL Output Enable Time
tPZH
tPLZ
tPHZ
tOSLH
tOSHL
Output Disable Time
Output to Output Skew
Time (note 1)
3.3(*)
3.3(*)
5.0(**)
5.0(**)
3.3(*)
5.0(**)
3.3(*)
5.0(**)
15 RL = 1K
50 RL = 1K
15 RL= 1K
50 RL= 1K
50 RL = 1K
50 RL = 1K
50
50
(*) Voltage range is 3.3V ± 0.3V
(**) Voltage range is 5V ± 0.5V
Note 1: Parameter guaranteed by design. tsoLH = |tpLHm- tpLHn|, tsoHL = |tpHLm - tpHLn|
Value
TA = 25 oC
Min. Typ. Max.
5.8 8.4
8.3 11.9
3.9 5.5
5.4 7.5
6.6 10.6
9.1 14.1
4.7 7.3
6.2 9.3
10.3 14.0
6.7 9.2
1.5
1.0
-40 to 85 oC
Min . Max.
1.0 10.0
1.0 13.5
1.0 6.5
1.0 8.5
1.0 12.5
1.0 16.0
1.0 8.5
1.0 10.5
1.0 16.0
1.0 10.5
1.5
1.0
Unit
ns
ns
ns
ns
3/8


3Pages


74VHC244 電子部品, 半導体
74VHC244
DIM.
A
a1
a2
b
b1
C
c1
D
E
e
e3
F
L
M
S
MIN.
0.10
0.35
0.23
12.60
10.00
7.40
0.50
SO-20 MECHANICAL DATA
mm
TYP.
0.50
1.27
11.43
MAX.
2.65
0.20
2.45
0.49
0.32
MIN.
0.004
0.013
0.009
45 (typ.)
13.00
0.496
10.65
0.393
7.60 0.291
1.27 0.19
0.75
8 (max.)
inch
TYP.
0.020
0.050
0.450
MAX.
0.104
0.007
0.096
0.019
0.012
0.512
0.419
0.299
0.050
0.029
P013L
6/8

6 Page



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共有リンク

Link :


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