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74VHC245MのメーカーはSTMicroelectronicsです、この部品の機能は「OCTAL BUS TRANSCEIVER 3-STATE」です。 |
部品番号 | 74VHC245M |
| |
部品説明 | OCTAL BUS TRANSCEIVER 3-STATE | ||
メーカ | STMicroelectronics | ||
ロゴ | |||
このページの下部にプレビューと74VHC245Mダウンロード(pdfファイル)リンクがあります。 Total 8 pages
®
s HIGH SPEED: tPD = 4.0 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 CONTROL
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 245
s IMPROVED LATCH-UP IMMUNITY
s LOW NOISE VOLP = 0.9V (Max.)
DESCRIPTION
The 74VHC245 is an advanced high-speed
CMOS OCTAL BUS TRANSCEIVER (3-STATE)
fabricated with sub-micron silicon gate and
double-layer metal wiring C2MOS technology.
This IC is intended for two-way asynchronous
communication between data busses; the
direction of data trasmission is determined by the
level of the DIR input. The enable input G can be
PIN CONNECTION AND IEC LOGIC SYMBOLS
74VHC245
OCTAL BUS
TRANSCEIVER (3-STATE)
PRELIMINARY DATA
M
(Micro Package)
T
(TSSOP Package)
ORDER CODES :
74VHC245M
74VHC245T
used to disable the device so that the busses are
effectively isolated.
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2kV ESD immunity and transient excess
voltage.
IT IS PROHIBITED TO APPLY A SIGNAL TO A
TERMINAL WHEN IT IS IN OUTPUT MODE
AND WHEN A BUS TERMINAL IS FLOATING
(HIGH IMPEDANCE STATE) IT IS REQUESTED
TO FIX THE INPUT LEVEL BY MEANS OF
EXTERNAL PULL DOWN OR PULL UP
RESISTOR.
June 1999
1/8
1 Page 74VHC245
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 or VIL
VO = VCC or GND
0 to 5.5
5.5
VI = 5.5V or GND
VI = VCC or GND
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
±0.1
4
±1.0
40
Un it
V
V
V
V
µA
µA
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
tPLZ Output Disable Time
tPHZ
3.3(*)
3.3(*)
5.0(**)
15 RL = 1KΩ
50 RL = 1KΩ
15 RL = 1KΩ
tPZL Output Enable Time
5.0(**)
3.3(*)
50 RL = 1KΩ
50 RL = 1KΩ
tPZH
tOSLH Output to Output Skew
5.0(**)
3.3(*)
50 RL = 1KΩ
50
tOSHL Time (note 1)
5.0(**)
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
4.0 5.5
5.5 7.5
8.5 13.2
11.0 16.7
5.8 8.5
7.3 10.6
11.5 15.8
7.0 9.7
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 15.5
1.0 19.0
1.0 10.0
1.0 12.0
1.0 18.0
1.0 11.0
1.5
1.0
Unit
ns
ns
ns
ns
3/8
3Pages 74VHC245
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 | |||
ページ | 合計 : 8 ページ | ||
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PDF ダウンロード | [ 74VHC245M データシート.PDF ] |
データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
部品番号 | 部品説明 | メーカ |
74VHC245 | OCTAL BUS TRANSCEIVER 3-STATE | STMicroelectronics |
74VHC245 | Octal Bidirectional Transceiver with 3-STATE Outputs | Fairchild Semiconductor |
74VHC245M | OCTAL BUS TRANSCEIVER 3-STATE | STMicroelectronics |
74VHC245M | Octal Bidirectional Transceiver with 3-STATE Outputs | Fairchild Semiconductor |